CN113295095B - High fill side slope geotechnical centrifugal model measurement control system - Google Patents
High fill side slope geotechnical centrifugal model measurement control system Download PDFInfo
- Publication number
- CN113295095B CN113295095B CN202110850710.3A CN202110850710A CN113295095B CN 113295095 B CN113295095 B CN 113295095B CN 202110850710 A CN202110850710 A CN 202110850710A CN 113295095 B CN113295095 B CN 113295095B
- Authority
- CN
- China
- Prior art keywords
- angle
- unit
- laser
- light source
- standard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a high fill side slope geotechnical centrifugal model measurement control system, which relates to the technical field of measurement and comprises a measurement point coordinate acquisition unit, a comparison unit, a data storage unit and a result output unit, wherein the measurement point coordinate acquisition unit is used for acquiring measurement three-dimensional coordinate data (Xt, Yt, Zt) of a measurement point in a model box, the comparison unit compares the measurement point height data Zt with standard height data Zm, and the compared height data difference is output through the result output unit. The high fill slope geotechnical centrifugal model measurement control system can be used for rapidly and accurately measuring the model, can be compared with a standard model, can assist workers to rapidly adjust and correct the model, enables the manufactured model to be consistent with an actual model, and improves the accuracy of model manufacturing.
Description
Technical Field
The invention relates to a measuring technology of irregular surfaces and profiles in the technical field of measurement, in particular to a high fill side slope geotechnical centrifugal model measurement control system based on laser ranging.
Background
The geotechnical centrifugal model test is a test technique for simulating gravity by using centrifugal force provided by a centrifugal machine, proportionally reducing the geometric shape of a prototype according to a similar criterion, and making a model by using soil bodies with the same physical properties to ensure that the stress state of the model in a centrifugal force field is consistent with that of the prototype in a gravity field so as to research engineering properties. On the premise of ensuring that the geometric dimensions of the prototype and the model are similar, the stress strain, the failure mechanism and the deformation of the prototype and the model are the same, the sedimentation and the deformation characteristics of the prototype can be reproduced through a centrifugal model test in a short time, and the method is widely applied to deformation prediction and analysis of high fill or soil foundation.
In the geotechnical centrifugal model test, it is important to ensure that the model manufactured indoors is highly similar or consistent with the prototype in the aspects of geometric dimension, shape and the like, and the accuracy and precision of model manufacture are ensured by the measurement technology, which is beneficial to improving the actual effect of the centrifugal model test. In the existing model making, the measurement of the size of the model is mainly carried out manually through a measuring scale, or scales are arranged on one side of a model box, although the measurement mode can be used for measuring a single filling model with a regular shape, the problems of low manual measurement precision and unsatisfactory measurement efficiency exist, and particularly for a multi-layer filling model with a complicated shape structure, the existing measurement mode is difficult to realize more accurate and efficient measurement, so that the preparation requirement of the model is difficult to meet. Therefore, how to ensure the prototype is highly similar or consistent with the model by a more effective measurement mode during modeling becomes an urgent problem to be solved.
Disclosure of Invention
In order to solve the problems, the invention adopts the technical scheme that:
a high fill side slope geotechnical centrifugal model measurement control system includes: the device comprises a measuring point coordinate acquisition unit, a comparison unit, a data storage unit and a result output unit;
the measurement point coordinate acquisition unit is used for acquiring measurement three-dimensional coordinate data (Xt, Yt, Zt) of a measurement point in the model box;
the data storage unit stores standard three-dimensional coordinate data (Xm, Ym, Zm) of the top surface of each filling layer;
the comparison unit acquires the horizontal and vertical coordinate data (Xt, Yt) of the measuring point, inquires standard height data Zm corresponding to the standard horizontal and vertical coordinate data (Xm, Ym) which are the same as the horizontal and vertical coordinate data (Xt, Yt) of the measuring point in the standard three-dimensional coordinate data (Xm, Ym, Zm), compares the height data Zt of the measuring point with the standard height data Zm, and outputs the difference value of the height data after comparison through the result output unit.
Preferably, the measurement control system further comprises a layer control unit, wherein the layer control unit is used for adjusting and recording the number F of the test points undergoing molding;
the standard three-dimensional coordinate data (Xm, Ym, Zm, Fm) stored in the data storage unit also comprises standard layer data Fm;
the comparison unit acquires the horizontal and vertical coordinate data (Xt, Yt) of the measuring point and the number of testing point layers F recorded by the layer control unit, inquires the standard horizontal and vertical coordinate data (Xt, Yt) of the measuring point and the same number of testing point layers F and the standard height data Zm corresponding to the standard layer data Fm from the standard three-dimensional coordinate data (Xm, Ym, Zm, Fm), and compares the height data Zt of the measuring point with the standard height data Zm.
Preferably, the measurement control system further comprises a laser ranging unit, wherein the laser ranging unit comprises a laser range finder, a pitching angle sensor and a vertical angle sensor;
the laser range finder is used for measuring and outputting a distance value L between the laser range finder and a measuring point;
the vertical angle sensor is used for measuring and outputting a pitch angle A of a laser beam generated by the laser range finder;
the pitching angle sensor is used for measuring and outputting a horizontal angle B of a laser beam generated by the laser range finder;
the measuring point coordinate acquisition unit comprises an input module and a three-dimensional coordinate data calculation module;
the input module acquires a distance value L, a pitch angle A and a horizontal angle B, and sends the distance value L, the pitch angle A and the horizontal angle B to the three-dimensional coordinate data calculation module, and the three-dimensional coordinate data calculation module is used for calculating three-dimensional coordinate data (Xt, Yt, Zt) of the measuring point.
Preferably, the three-dimensional coordinate data calculation module calculates the three-dimensional coordinate data (Xt, Yt, Zt) of the measurement point by:
Xt=X0-L sinA×cosB
Yt=Y0-L sinA×sinB
Zt=Z0-L cosA
wherein (X)0,Y0,Z0) Is the three-dimensional coordinate data, X, of a preset laser range finder0Abscissa value, Y, representing laser rangefinder0Ordinate value, Z, representing laser rangefinder0Indicating the height of the laser rangefinder, L the distance from the laser rangefinder to the measurement point, aThe pitch angle of the laser beam generated by the measuring laser rangefinder, B, represents the horizontal angle of the laser beam generated by the measuring laser rangefinder.
Preferably, the measurement control system further comprises a direction calibration unit, wherein the direction calibration unit comprises an X-direction laser receiver and a Y-direction laser receiver;
when the X-direction laser receiver receives a laser beam generated by the laser range finder, calibrating the current direction of the laser receiver into the X direction, wherein the X direction is the length direction of the model box;
when the Y-direction laser receiver receives the laser beam generated by the laser range finder, the current direction of the laser receiver is calibrated to be the Y direction, and the Y direction is the width direction of the model box.
Preferably, the measurement control system further comprises a scanning control unit, the scanning control unit comprises an angle array generation module, the angle array generation module is used for generating a plurality of detection angles, and each detection angle comprises a pitch angle a and a horizontal angle B;
the laser range finder unit also comprises an angle adjusting platform, the laser range finder is arranged on the angle adjusting platform, and the angle adjusting platform can adjust the pitch angle and the horizontal angle of the laser range finder;
the scanning control unit is connected with the angle adjusting platform, controls the angle adjusting platform to adjust the laser range finder to each angle according to the plurality of detection angles generated by the angle array generating module, and controls the measurement angular coordinate obtaining unit to obtain measurement three-dimensional coordinate data (Xt, Yt, Zt) of each measurement angle;
the scanning control unit controls the comparison unit to compare the measured three-dimensional coordinate data (Xt, Yt, Zt) of each measurement angle one by one to form a scanning result, and stores the scanning result in the data storage unit.
Preferably, the measurement control system further comprises a visual output unit, the visual output unit comprises a coaxial light source and a light source color control module, the coaxial light source is arranged on the angle adjusting platform and can move synchronously with the laser range finder, and a light beam generated by the coaxial light source is coaxial with a light beam generated by the laser range finder;
the light source color control module is connected with the coaxial light source and used for controlling the color of the coaxial light source;
the light source color control module is connected with the comparison unit, obtains the height data difference value output by the comparison unit, and changes the color of the coaxial light source according to the corresponding relation between the preset height data difference value range and the color.
Preferably, the scanning control unit further comprises a correction tracking module, the correction tracking module obtains the scanning results recorded by the data storage unit, and compares the height data difference value with a preset standard difference value one by one;
if the absolute value of the height data difference value is larger than the standard difference value, controlling the angle adjusting platform to move to a pitch angle A and a horizontal angle B corresponding to the height data difference value, and controlling the light source color control module to adjust the color of the coaxial light source;
the measuring point coordinate obtaining unit and the comparing unit recalculate the measuring point coordinate in real time, compare the measuring point height data Zt with the standard height data Zm to obtain a new height data difference value, and write the new height data difference value into the data storage unit;
if the absolute value of the height data difference is less than or equal to the standard difference, the next height data difference is compared with the preset standard difference, and the process is repeated until the absolute values of all the height data differences are less than or equal to the standard difference.
Preferably, the visual output unit is provided with a focal length adjusting module, and the focal length adjusting module is connected with the coaxial light source and can adjust the focal length of the coaxial light source;
the correction tracking module acquires a scanning result recorded by the data storage unit, and judges whether the absolute value of the height data difference value of a certain measuring point and an adjacent measuring point is greater than a standard difference value in the scanning result;
and controlling the angle adjusting platform to move to a pitch angle A and a horizontal angle B corresponding to the height data difference value, controlling the focal length adjusting module to shorten the focal length of the coaxial light source, and controlling the light source color control module to adjust the color of the coaxial light source.
The model box device comprises a box body and a high fill slope geotechnical centrifugal model measurement control system.
The invention has the beneficial effects that:
the high fill side slope geotechnical centrifugal model measurement control system provided can realize accurate measurement of the thickness of each layer of filled soil and the top surface profile based on the laser ranging technology, greatly improves the measurement efficiency and accuracy, and is beneficial to realizing rapid and accurate modeling. Wherein the scanning control unit can measure the model and compare with the standard model; the angle array generating module can automatically generate a plurality of test points, an angle array is generated aiming at each test point, and the scanning control unit can automatically compare each test point one by one and generate a scanning result; the correction tracking module and the visual output unit can guide the adjustment and correction of the model according to the scanning result, and the model is adjusted and corrected quickly in an auxiliary manual mode through the errors of the visual color display test points.
Drawings
Fig. 1 is a schematic view of a high fill slope geotechnical centrifugal model measurement control system according to an embodiment of the invention;
fig. 2 is a schematic diagram of a layer control unit of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention;
FIG. 3 is a schematic diagram of a laser ranging unit of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention;
FIG. 4 is a schematic diagram of a direction calibration unit of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention;
FIG. 5 is a schematic view of a visual output unit of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention;
FIG. 6 is a schematic view of a mold box assembly according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a direction calibration unit of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention;
FIG. 8 is a schematic diagram of a three-dimensional coordinate calculation module of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention;
fig. 9 is a schematic diagram of a scanning control unit of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention;
fig. 10 is a schematic diagram of a layer control unit principle of the high fill slope geotechnical centrifugal model measurement control system according to the embodiment of the invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and embodiments thereof.
Example 1
Referring to fig. 1, the high fill slope geotechnical centrifugal model measurement control system includes: the device comprises a measuring point coordinate acquisition unit, a comparison unit, a data storage unit and a result output unit;
the measuring point coordinate obtaining unit is used for obtaining measuring three-dimensional coordinate data (Xt, Yt, Zt) of a measuring point in the model box 1;
the data storage unit stores standard three-dimensional coordinate data (Xm, Ym, Zm) of the top surface of the filling layer;
the comparison unit acquires the horizontal and vertical coordinate data (Xt, Yt) of the measuring point, inquires standard height data Zm corresponding to the standard horizontal and vertical coordinate data (Xm, Ym) which are the same as the horizontal and vertical coordinate data (Xt, Yt) of the measuring point in the standard three-dimensional coordinate data (Xm, Ym, Zm), compares the height data Zt of the measuring point with the standard height data Zm, and outputs the difference value of the height data after comparison through the result output unit.
In this embodiment, the standard three-dimensional coordinate data (Xm, Ym, Zm) of the top surface of the filling layer is a model data if a measurement point (Xt) is known1,Yt1) Let Xm = Xt1And Ym = Yt1Then Xm = Xt can be queried1、Ym=Yt1Zm, Zm in time is standard height data corresponding to standard horizontal and vertical coordinate data (Xm, Ym) identical to the horizontal and vertical coordinate data (Xt, Yt) of the measurement point.
The comparison unit compares the height data Zt of the measuring point with the standard height data Zm, and outputs the difference value of the compared height data through the result output unit.
The result output by the comparison unit comprises a height data difference value and an absolute value of the height data difference value, the comparison unit can also preset a standard difference value, the absolute value of the height data difference value is compared with the preset standard difference value, if the absolute value of the height data difference value is smaller than or equal to the standard difference value, the measuring point is qualified, otherwise, the measuring point is unqualified; the comparison unit can also directly output the comparison result.
The preset standard deviation value can be set and adjusted by people.
In the specific implementation process, before the centrifugal test is started, the prototype is scaled down to be a standard model, filling soil needs to be manually operated in the model box 1, and the shape of the filling soil is consistent with that of the standard model.
After the manual filling is initially completed, the measured three-dimensional coordinate data (Xt, Yt, Zt) of the measuring point is acquired by the measuring point coordinate acquisition unit, and the comparison unit compares the measured three-dimensional coordinate data (Xt, Yt, Zt) with the standard three-dimensional coordinate data (Xm, Ym, Zm) and outputs a comparison result.
After obtaining the comparison result, the operator can adjust the filling soil body in the model box 1 according to the comparison result, so that the shape of the filling soil body is close to that of the standard model, the model is closer to the prototype geometry, and the damage mechanism and the deformation of the model in the centrifugal test can be closer to the damage and the deformation of the real situation.
Further, referring to fig. 2, the measurement control system further includes a layer control unit, where the layer control unit is configured to adjust and record the number F of test points undergoing molding;
the standard three-dimensional coordinate data (Xm, Ym, Zm, Fm) stored in the data storage unit also comprises standard layer data Fm;
the comparison unit acquires the horizontal and vertical coordinate data (Xt, Yt) of the measuring point and the number of testing point layers F recorded by the layer control unit, inquires the standard horizontal and vertical coordinate data (Xt, Yt) of the measuring point and the same number of testing point layers F and the standard height data Zm corresponding to the standard layer data Fm from the standard three-dimensional coordinate data (Xm, Ym, Zm, Fm), and compares the height data Zt of the measuring point with the standard height data Zm.
In this embodiment, the operator specifies the number of layers being filled by the layer control unit, and the standard three-dimensional coordinate data (Xm, Ym, Zm, Fm) also records the standard three-dimensional coordinate data of the top surface of each filling layer in the case of multiple layers.
For example, (Xm)1,Ym1,Zm11) denotes the top surface of the first standard layer with a standard abscissa of (Xm)1,Ym1) Standard height data of standard point 1 of (1) is Zm1。
(Xm1,Ym1,Zm22) denotes the top surface of the second standard layer with a standard abscissa of (Xm)1,Ym1) Standard height data of standard point 1 of (1) is Zm2。
In the concrete implementation process, the prototype may include a plurality of soil layers with different materials, the standard model includes model data of each filling soil layer, and considering that the filling soil layers have different composition and strength, if the same material is used for simulation, the strength of different filling soil layers and soil layer interfaces and the influence on the settlement and stability of the high filling side slope cannot be truly simulated.
Therefore, model soil bodies with the same layer number, the same components and the same shape as those of each soil layer in a standard model (an actual filling side slope prototype) are filled in the model box 1, so that the geometric size, the shape and the material composition of the indoor centrifugal model and the prototype are close to or consistent, the settlement, the deformation and the failure mechanism of the high filling side slope can be better simulated in a centrifugal test, and the condition is consistent with the real condition.
Further, referring to fig. 3, the measurement control system further includes a laser ranging unit including a laser range finder 2, a pitch angle sensor, and a vertical angle sensor;
the laser range finder 2 is used for measuring and outputting a distance value L between the laser range finder and a measuring point;
the vertical angle sensor is used for measuring and outputting a pitch angle A of the laser beam generated by the laser range finder 2;
the pitching angle sensor is used for measuring and outputting a horizontal angle B of the laser beam generated by the laser range finder 2;
the measuring point coordinate acquisition unit comprises an input module and a three-dimensional coordinate data calculation module;
the input module acquires a distance value L, a pitch angle A and a horizontal angle B, and sends the distance value L, the pitch angle A and the horizontal angle B to the three-dimensional coordinate data calculation module, and the three-dimensional coordinate data calculation module is used for calculating three-dimensional coordinate data (Xt, Yt, Zt) of the measuring point.
In this embodiment, a laser ranging unit is arranged in the model box 1, the laser ranging unit includes a laser range finder 2, a pitch angle sensor and a vertical angle sensor, and the coordinate acquisition unit calculates three-dimensional coordinate data (Xt, Yt, Zt) of measurement points through a distance value L, a pitch angle a and a horizontal angle B.
Further, the three-dimensional coordinate data calculation module calculates the measurement point three-dimensional coordinate data (Xt, Yt, Zt) by:
Xt=X0-L sinA×cosB
Yt=Y0-L sinA×sinB
Zt=Z0-L cosA
wherein (X)0,Y0,Z0) Is the preset three-dimensional coordinate data, X, of the laser range finder 20Abscissa value, Y, representing laser range finder 20Ordinate value, Z, indicating the laser range finder 20Indicating the height value of the laser range finder 2, L indicating the distance value of the laser range finder 2 from the measuring point, a indicating the pitch angle of the laser beam generated by the measuring laser range finder 2, and B indicating the horizontal angle of the laser beam generated by the measuring laser range finder 2.
In this embodiment, as shown in fig. 8, S1 is a measurement point, the origin of the model coordinates is on the bottom plane inside the model box 1,
the axis is the length direction of the model box 1, the Y axis is the width direction of the model box 1, and the Z axis is the height direction of the model box 1.
In a specific implementation process, L sinA represents the projection length of a connecting line between the laser range finder 2 and the measuring point S1 on an XY plane; l sinA multiplied by cosB represents the length of the projection of the connecting line of the measuring point S1 on the X axis; x0-L sinAThe X cosB represents the length of the connection line of the measuring point S1 subtracted from the abscissa of the laser range finder 2 projected on the X-axis, which is the abscissa of the measuring point S1.
L sinA multiplied by sinB represents the projection length of the connecting line of the measuring point S1 on the Y axis;
Y0l sinA × sinB represents the ordinate of the laser range finder 2 minus the length of the Y-axis projection of the connecting line of the measuring point S1, i.e. the ordinate of the measuring point S1.
L cosA represents the length of the projection of the connecting line of the measuring point S1 on the Z axis; z0L cosA represents the height value of the laser range finder 2 minus the length of the Z-axis projection of the connecting line of the measuring point S1, namely the height value of the measuring point S1.
Referring to fig. 6, 7 and 9, further, the measurement control system further includes a direction calibration unit, where the direction calibration unit includes an X-direction laser receiver 3 and a Y-direction laser receiver 4;
when the X-direction laser receiver 3 receives the laser beam generated by the laser range finder 2, the current direction of the laser receiver is calibrated to be the X direction, and the X direction is the length direction of the model box 1;
when the Y-direction laser receiver 4 receives the laser beam generated by the laser range finder 2, the current direction of the laser receiver is calibrated to be the Y direction, and the Y direction is the width direction of the model box 1.
In the embodiment, the position of the laser range finder 2 in the model box 1 is fixed, so that the coordinate of the laser range finder 2 in the model coordinate system is fixed;
however, the pitch angle and the horizontal angle of the laser range finder 2 can be changed, and the pitch angle and the horizontal angle of the laser range finder 2 need to be calibrated each time the measurement is started, in this embodiment, during direction calibration, the direction calibration unit controls the light beam of the laser range finder 2 to point to the vertical direction, then controls the pitch angle of the laser range finder 2 to rotate, and when the X-direction laser receiver 3 receives the laser beam generated by the laser range finder 2, the current direction is calibrated to the X direction;
then the direction calibration unit controls the laser range finder 2 to direct the light beam to the vertical direction, then controls the laser range finder 2 to rotate horizontally, and when the Y-direction laser receiver 4 receives the laser beam generated by the laser range finder 2, the current direction is calibrated to be the Y direction.
In the specific implementation process, the measurement control system is automatically initialized after being electrified, and the direction calibration of the laser range finder 2 is automatically completed during the initialization process, so that the rapid calibration is realized without manual intervention.
Referring to fig. 4, further, the measurement control system further includes a scanning control unit, the scanning control unit includes an angle array generation module, the angle array generation module is configured to generate a plurality of detection angles, each detection angle includes a pitch angle a and a horizontal angle B;
the laser range finder unit further comprises an angle adjusting platform, the laser range finder 2 is mounted on the angle adjusting platform, and the angle adjusting platform can adjust the pitch angle and the horizontal angle of the laser range finder 2;
the scanning control unit is connected with the angle adjusting platform, controls the angle adjusting platform to adjust the laser range finder 2 to each angle according to the plurality of detection angles generated by the angle array generating module, and controls the measurement angular coordinate obtaining unit to obtain measurement three-dimensional coordinate data (Xt, Yt, Zt) of each measurement angle;
the scanning control unit controls the comparison unit to compare the measured three-dimensional coordinate data (Xt, Yt, Zt) of each measurement angle one by one to form a scanning result, and stores the scanning result in the data storage unit.
In this embodiment, as shown in fig. 9 and 10, the angle array generating module generates an angle array according to a preset horizontal angle increment value and a preset pitch angle increment value, and in this embodiment, the angle array includes 5 horizontal angles and 4 pitch angles, so that a total of 20 measurement points (measurement point 1-measurement point 20) are generated.
The number F of the testing points recorded by the layer control unit is 1, the scanning control unit controls the angle adjusting platform to adjust the laser range finder 2 to the measuring point 1, and the measured three-dimensional coordinate data (Xt) of the measuring point 1 is obtained1,Yt1,Zt1) Comparing the measured three-dimensional coordinate data (Xt) of the measuring points by the unit1,Yt1,Zt1) And standard three-dimensional coordinate data (Xm)1,Ym1,Zm11) comparison, recording Zt1And Zm1A difference of (d);
then the scanning control unit controls the angle adjusting platform to adjust the laser range finder 2 to the measuring point 2, and the process is repeated until the scanning measurement of 20 measuring points is completed.
In a specific implementation process, the horizontal angle increment value and the pitch angle increment value can be designated manually or can be used as preset values, the scanning control unit can scan the array points one by one according to the angle array and the scanning control logic, and each scanning point is measured to finally generate a scanning result. The similarity of the model and the prototype can be verified through the scanning result, the scanning result can prompt the error value of each measuring point, and an operator can correct the model according to the scanning result, so that the geometric size and the shape of the model and the prototype are consistent with the thickness and the distribution of a soil layer, and the settlement, the deformation and the slope failure mechanism of the model in the centrifugal test are ensured to be closer to the real condition.
Referring to fig. 5, further, the measurement control system further includes a visual output unit, the visual output unit includes a coaxial light source and a light source color control module, the coaxial light source is disposed on the angle adjustment platform and can move synchronously with the laser range finder 2, and a light beam generated by the coaxial light source is coaxial with a light beam generated by the laser range finder 2;
the light source color control module is connected with the coaxial light source and used for controlling the color of the coaxial light source;
the light source color control module is connected with the comparison unit, obtains the height data difference value output by the comparison unit, and changes the color of the coaxial light source according to the corresponding relation between the preset height data difference value range and the color.
In this embodiment, the height data difference value output by the comparison unit and the color of the coaxial light source can be adjusted by the light source color control module according to the preset corresponding relationship between the height data difference value range and the color, so as to prompt an operator.
For example, the height data difference range includes three segments:
the height data difference Ht < -Hm represents that the height of the test point is unqualified and is lower than a standard value;
the height data difference value Ht < Hm is smaller than or equal to Hm, and the height of the test point is qualified;
and if the height data difference Ht is greater than Hm, the height of the test point is unqualified and is higher than the standard value.
The laser range finder 2 is aligned with the measuring point 1, and the difference value of the height data output by the comparison unit is Ht1；
If Ht is present1<Hm, the light source color control module adjusts the color of the light source to be blue, and an operator can quickly know that the height of the position pointed by the coaxial light source is lower than a standard value;
if Ht is more than or equal to-Hm and less than Hm, the light source color control module adjusts the color of the light source to be green, and an operator can quickly know that the height of the position pointed by the coaxial light source is qualified;
if Ht > Hm, the light source color control module adjusts the light source color to be red, and an operator can quickly know that the position height pointed by the coaxial light source is higher than a standard value.
In the specific implementation process, the visual output unit can prompt an operator according to the preset corresponding relation between the height data difference range and the color and the height data difference output by the comparison unit in a mode of adjusting the color of the light source, whether the model of the coaxial light source pointing position is qualified or not, the operator can quickly know the position information and the color information, and the correction can be quickly carried out according to the color information.
Furthermore, the scanning control unit also comprises a correction tracking module, the correction tracking module acquires the scanning results recorded by the data storage unit and compares the height data difference value with a preset standard difference value one by one;
if the absolute value of the height data difference value is larger than the standard difference value, controlling the angle adjusting platform to move to a pitch angle A and a horizontal angle B corresponding to the height data difference value, and controlling the light source color control module to adjust the color of the coaxial light source;
the measuring point coordinate obtaining unit and the comparing unit recalculate the coordinates of the measuring points in real time and the high data of the measuring points
Comparing the height data with the standard height data Zm to obtain a new height data difference value, and writing the new height data difference value into a data storage unit;
if the absolute value of the height data difference is less than or equal to the standard difference, the next height data difference is compared with the preset standard difference, and the process is repeated until the absolute values of all the height data differences are less than or equal to the standard difference.
In this embodiment, the correction tracking module can guide an operator to correct each measuring point one by one after scanning is completed until all the measuring points are in a qualified state, at this time, the shape of the top plane of the current layer of the model and the prototype is within a preset reasonable error, the model is closer to the prototype geometry, and the damage mechanism and the deformation of the model in the centrifugal test can be closer to the damage and the deformation of the real situation.
Further, the visual output unit is provided with a focal length adjusting module, and the focal length adjusting module is connected with the coaxial light source and can adjust the focal length of the coaxial light source;
the correction tracking module acquires a scanning result recorded by the data storage unit, and judges whether the absolute value of the height data difference value of a certain measuring point and an adjacent measuring point is greater than a standard difference value in the scanning result;
the angle adjusting platform is controlled to move to the pitch angle corresponding to the height data difference value
And horizontal angle
And controlling the focal length adjusting module to shorten the focal length of the coaxial light source and controlling the light source color control module to adjust the color of the coaxial light source.
In this embodiment, because the difference between the first-time filled shape and the prototype is large under normal conditions, the correction and tracking module can judge the overall error condition and guide the operator to perform large-scale adjustment.
For example, the correction tracking module obtains the scanning result information, and if the difference between the measurement point 5 and the prototype is the largest among 20 measurement points, and there are errors in the same direction in the measurement points near the measurement point 5, the correction tracking module controls the coaxial light source to point to the measurement point 5, and adjusts the focal length of the coaxial light source, so that the irradiation range of the coaxial light source is wider, and the adjustment of the focal length of the coaxial light source may be performed according to preset parameters, specifically, the focal length of the coaxial light source includes 5 steps from near to far, which are respectively: k1, K2, K3, K4, K5, visual output unit presets the corresponding relation between coaxial light source focal length, measuring point height Zt, scope.
In the specific process, the height Zt of the measurement point is low, 8 measurement points near the measurement point 5 have errors in the same direction, 9 measurement points need to be irradiated by the coaxial light source, the focal length is selected to be K3 according to the correspondence, and then the focal length of the coaxial light source is adjusted to be K3 and the coaxial light source points to the measurement point 5.
In this case, the operator can widely and entirely correct the model height at the measurement point 5 and its vicinity.
When the correction tracking module detects that the unqualified measuring points are distributed discretely, the focal length of the coaxial light source is readjusted, and each measuring point is corrected one by one until all the measuring points are in a qualified state.
In a specific implementation process, as shown in fig. 9, after the first layer is filled and corrected, the number F of test point layers recorded by the layer control unit is manually operated to be 2, the second layer is filled, and the scanning control and correction tracking process for the second layer shown in fig. 10 is restarted.
The model box 1 device comprises a box body and a high fill slope geotechnical centrifugal model measurement control system.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "inner", "outer", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for the purpose of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Where "inside" refers to an interior or enclosed area or space. "periphery" refers to an area around a particular component or a particular area.
In the description of the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the embodiments of the invention, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the embodiments of the present invention, it is to be understood that "-" and "-" denote ranges of two numerical values, and the ranges include endpoints. For example, "A-B" means a range greater than or equal to A and less than or equal to B. "A to B" represents a range of A or more and B or less.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. High fill side slope geotechnique centrifugal model measurement control system, its characterized in that includes: the device comprises a measuring point coordinate acquisition unit, a comparison unit, a data storage unit, a layer control unit and a result output unit;
the measurement point coordinate acquisition unit is used for acquiring measurement three-dimensional coordinate data (Xt, Yt, Zt) of a measurement point in the model box;
the data storage unit stores standard three-dimensional coordinate data (Xm, Ym, Zm) of the top surface of each filling layer;
the layer control unit is used for adjusting and recording the number F of the test points which are performing molding;
the standard three-dimensional coordinate data (Xm, Ym, Zm, Fm) stored in the data storage unit also comprises standard layer data Fm;
the method comprises the steps that a comparison unit obtains measuring point horizontal and vertical coordinate data (Xt, Yt) and test point layer number F recorded by a layer control unit, the comparison unit inquires standard horizontal and vertical coordinate data (Xt, Yt) which are the same as the measuring point horizontal and vertical coordinate data (Xt, Yt) and the test point layer number F and standard height data Zm corresponding to the standard layer data Fm in standard three-dimensional coordinate data (Xm, Ym, Zm, Fm), compares the measuring point height data Zt with the standard height data Zm, and outputs a height data difference value after comparison through a result output unit;
the measurement control system also comprises a laser ranging unit, wherein the laser ranging unit comprises a laser range finder, a pitching angle sensor and a vertical angle sensor;
the laser range finder is used for measuring and outputting a distance value L between the laser range finder and a measuring point;
the vertical angle sensor is used for measuring and outputting a pitch angle A of a laser beam generated by the laser range finder;
the pitching angle sensor is used for measuring and outputting a horizontal angle B of a laser beam generated by the laser range finder;
the measuring point coordinate obtaining unit comprises an input module and a three-dimensional coordinate data calculating module, wherein the input module obtains a distance value L, a pitch angle A and a horizontal angle B, and sends the distance value L, the pitch angle A and the horizontal angle B to the three-dimensional coordinate data calculating module, and the three-dimensional coordinate data calculating module is used for calculating three-dimensional coordinate data (Xt, Yt and Zt) of the measuring point;
the measurement control system also comprises a scanning control unit, wherein the scanning control unit comprises an angle array generation module, the angle array generation module is used for generating a plurality of detection angles, and each detection angle comprises a pitch angle A and a horizontal angle B;
the laser range finder unit also comprises an angle adjusting platform, the laser range finder is arranged on the angle adjusting platform, and the angle adjusting platform can adjust the pitch angle and the horizontal angle of the laser range finder;
the scanning control unit is connected with the angle adjusting platform, controls the angle adjusting platform to adjust the laser range finder to each angle according to the plurality of detection angles generated by the angle array generating module, and controls the measurement angular coordinate obtaining unit to obtain measurement three-dimensional coordinate data (Xt, Yt, Zt) of each measurement angle; the scanning control unit controls the comparison unit to compare the measured three-dimensional coordinate data (Xt, Yt, Zt) of each measured angle one by one to form a scanning result, and the scanning result is stored in the data storage unit;
the measurement control system also comprises a visual output unit, the visual output unit comprises a coaxial light source and a light source color control module, the coaxial light source is arranged on the angle adjusting platform and can move synchronously with the laser range finder, and a light beam generated by the coaxial light source is coaxial with a light beam generated by the laser range finder;
the light source color control module is connected with the coaxial light source and used for controlling the color of the coaxial light source; the light source color control module is connected with the comparison unit, obtains the height data difference value output by the comparison unit, and changes the color of the coaxial light source according to the corresponding relation between the preset height data difference value range and the color;
the scanning control unit also comprises a correction tracking module, and the correction tracking module acquires the scanning results recorded by the data storage unit and compares the height data difference value with a preset standard difference value one by one; if the absolute value of the height data difference value is larger than the standard difference value, controlling the angle adjusting platform to move to a pitch angle A and a horizontal angle B corresponding to the height data difference value, and controlling the light source color control module to adjust the color of the coaxial light source; the measuring point coordinate obtaining unit and the comparing unit recalculate the measuring point coordinate in real time, compare the measuring point height data Zt with the standard height data Zm to obtain a new height data difference value, and write the new height data difference value into the data storage unit; if the absolute value of the height data difference is less than or equal to the standard difference, comparing the next height data difference with a preset standard difference; repeating the process of acquiring the scanning result recorded by the data storage unit and comparing the height data difference values with the preset standard difference value one by the correction tracking module until the absolute values of all the height data difference values are less than or equal to the standard difference value;
the visual output unit is provided with a focal length adjusting module, and the focal length adjusting module is connected with the coaxial light source and can adjust the focal length of the coaxial light source;
the correction tracking module obtains a scanning result recorded by the data storage unit, and if the absolute value of the height data difference value of a certain measuring point and an adjacent measuring point in the scanning result is larger than a standard difference value, the correction tracking module controls the angle adjusting platform to move to a pitch angle A and a horizontal angle B corresponding to the height data difference value, controls the focal length adjusting module to shorten the focal length of the coaxial light source, and controls the light source color control module to adjust the color of the coaxial light source.
2. The high fill slope geotechnical centrifugal model measurement control system according to claim 1, characterized in that: the three-dimensional coordinate data calculation module calculates the three-dimensional coordinate data (Xt, Yt, Zt) of the measurement point by:
Xt=X0-L sinA×cosB
Yt=Y0-L sinA×sinB
Zt=Z0-L cosA
wherein (X)0,Y0,Z0) Is the three-dimensional coordinate data, X, of a preset laser range finder0Abscissa value, Y, representing laser rangefinder0Ordinate value, Z, representing laser rangefinder0The height value of the laser distance meter is represented, the distance value between the laser distance meter and the measuring point is represented by L, the pitch angle of the laser beam generated by the laser distance meter is represented by A, and the horizontal angle of the laser beam generated by the laser distance meter is represented by B.
3. The high fill slope geotechnical centrifugal model measurement control system according to claim 1 or 2, characterized in that: the measurement control system also comprises a direction calibration unit, wherein the direction calibration unit comprises an X-direction laser receiver and a Y-direction laser receiver;
when the X-direction laser receiver receives a laser beam generated by the laser range finder, calibrating the current direction of the laser receiver into the X direction, wherein the X direction is the length direction of the model box;
when the Y-direction laser receiver receives the laser beam generated by the laser range finder, the current direction of the laser receiver is calibrated to be the Y direction, and the Y direction is the width direction of the model box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110850710.3A CN113295095B (en) | 2021-07-27 | 2021-07-27 | High fill side slope geotechnical centrifugal model measurement control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110850710.3A CN113295095B (en) | 2021-07-27 | 2021-07-27 | High fill side slope geotechnical centrifugal model measurement control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113295095A CN113295095A (en) | 2021-08-24 |
| CN113295095B true CN113295095B (en) | 2021-10-15 |
Family
ID=77331298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110850710.3A Active CN113295095B (en) | 2021-07-27 | 2021-07-27 | High fill side slope geotechnical centrifugal model measurement control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113295095B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6122065A (en) * | 1996-08-12 | 2000-09-19 | Centre De Recherche Industrielle Du Quebec | Apparatus and method for detecting surface defects |
| JP2006210795A (en) * | 2005-01-31 | 2006-08-10 | Sanyo Electric Co Ltd | Compound semiconductor light emitting device |
| CN102507139A (en) * | 2011-10-29 | 2012-06-20 | 成都理工大学 | Diving geological model experimental device |
| CN104697445A (en) * | 2013-12-10 | 2015-06-10 | 湖南三德科技股份有限公司 | Volume measurement method for stock pile with uneven base level |
| CN105034613A (en) * | 2014-03-17 | 2015-11-11 | 株式会社理光 | Load estimation apparatus, laser light irradiation system, and load estimation method |
| JP2018181271A (en) * | 2017-04-21 | 2018-11-15 | 佐藤工業株式会社 | Methods of representing and evaluating three-dimensional body |
| CN108871230A (en) * | 2018-05-30 | 2018-11-23 | 重庆大学 | A kind of experimental system and method for the three-dimensional laser scanner for simulation laboratory test |
| CN110307790A (en) * | 2019-07-04 | 2019-10-08 | 深圳市富源信息技术有限公司 | Camera shooting machine detecting device and method applied to safety monitoring slope |
| CN110617796A (en) * | 2019-09-06 | 2019-12-27 | 北京住总集团有限责任公司 | System for settlement monitoring based on laser three-dimensional modeling |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2528791A1 (en) * | 2005-12-01 | 2007-06-01 | Peirong Jia | Full-field three-dimensional measurement method |
| CN101344390B (en) * | 2008-08-19 | 2010-11-03 | 南京师范大学 | High-fidelity digital modeling method for landform altitude |
| US20110032519A1 (en) * | 2009-08-05 | 2011-02-10 | Alberto Coletti | System for detecting the inclination of light sources, in particular of precision approach slope indicators of an airport runway |
| CN104713491B (en) * | 2015-04-10 | 2018-02-02 | 招商局重庆交通科研设计院有限公司 | The method that the slope monitoring system of slope deforming three-dimensional data can be obtained and its obtain slope deforming three-dimensional data |
| CN106123845A (en) * | 2015-05-07 | 2016-11-16 | 国家测绘地理信息局第六地形测量队 | Slope displacement monitoring method based on three-dimensional laser scanning technique |
| CN106504327A (en) * | 2016-11-04 | 2017-03-15 | 辽宁工程技术大学 | A kind of side slope point cloud surface is rebuild and deformation information extracting method |
| CN106767676B (en) * | 2016-11-23 | 2023-04-28 | 中国地质大学（武汉） | Spatial vertical distribution point position measurement method and system |
| CN106597417A (en) * | 2017-01-10 | 2017-04-26 | 北京航天计量测试技术研究所 | Remote scanning laser radar measurement error correction method |
| CN106949875A (en) * | 2017-05-23 | 2017-07-14 | 中国电建集团成都勘测设计研究院有限公司 | Suitable for the physical analog test apparatus of slope deformation destruction |
| CN108596497A (en) * | 2018-04-26 | 2018-09-28 | 成都理工大学 | A kind of karst avalanche largest motion distance calculating method and its application |
| CN110920070A (en) * | 2018-09-04 | 2020-03-27 | 三纬国际立体列印科技股份有限公司 | Automatic coloring method for 3D solid model |
| CN110409369B (en) * | 2019-05-29 | 2021-06-04 | 水电水利规划设计总院 | Slope excavation digital construction and quality control method |
| CN110654028B (en) * | 2019-10-12 | 2021-03-05 | 上海联泰科技股份有限公司 | Three-dimensional object data layering processing method and 3D printing equipment |
| CN111207728A (en) * | 2020-03-03 | 2020-05-29 | 王刚强 | Unmanned aerial vehicle measures equipment of side slope and foundation ditch excavation volume |
| CN111679060B (en) * | 2020-06-28 | 2024-05-28 | 河海大学 | Angle-variable side slope model test device and method under coupling effect of earthquake and rainfall |
| CN111623722B (en) * | 2020-07-29 | 2020-11-03 | 湖南致力工程科技有限公司 | Multi-sensor-based slope deformation three-dimensional monitoring system and method |
-
2021
- 2021-07-27 CN CN202110850710.3A patent/CN113295095B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6122065A (en) * | 1996-08-12 | 2000-09-19 | Centre De Recherche Industrielle Du Quebec | Apparatus and method for detecting surface defects |
| JP2006210795A (en) * | 2005-01-31 | 2006-08-10 | Sanyo Electric Co Ltd | Compound semiconductor light emitting device |
| CN102507139A (en) * | 2011-10-29 | 2012-06-20 | 成都理工大学 | Diving geological model experimental device |
| CN104697445A (en) * | 2013-12-10 | 2015-06-10 | 湖南三德科技股份有限公司 | Volume measurement method for stock pile with uneven base level |
| CN105034613A (en) * | 2014-03-17 | 2015-11-11 | 株式会社理光 | Load estimation apparatus, laser light irradiation system, and load estimation method |
| JP2018181271A (en) * | 2017-04-21 | 2018-11-15 | 佐藤工業株式会社 | Methods of representing and evaluating three-dimensional body |
| CN108871230A (en) * | 2018-05-30 | 2018-11-23 | 重庆大学 | A kind of experimental system and method for the three-dimensional laser scanner for simulation laboratory test |
| CN110307790A (en) * | 2019-07-04 | 2019-10-08 | 深圳市富源信息技术有限公司 | Camera shooting machine detecting device and method applied to safety monitoring slope |
| CN110617796A (en) * | 2019-09-06 | 2019-12-27 | 北京住总集团有限责任公司 | System for settlement monitoring based on laser three-dimensional modeling |
Non-Patent Citations (3)
| Title |
|---|
| A research of the soil cut high slope deformation characteristics based on centrifugal model tests;CHEN Jing;《Journal of Chengdu University of Technology》;20081231;第532－536页 * |
| 三维激光扫描技术在边坡监测中的应用研究;刘九阳;《中国优秀博硕士学位论文全文数据库(硕士)基础科学辑》;20190115;第A008-350页 * |
| 预加固高填方边坡滑动破坏的离心模型试验研究;李天斌 等;《岩土力学》;20131110;第3061-3070页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113295095A (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107167790B (en) | A kind of two step scaling method of laser radar based on Calibration Field | |
| CN103453849B (en) | The complex curved surface parts method for three-dimensional measurement that many optical sensors are collaborative and system | |
| CN103292748B (en) | A kind of split of many substrates based on laser measurement detection method | |
| CN108645428A (en) | The monoblock type scaling method of six degree of freedom laser target | |
| CN108253906A (en) | A kind of axle housing circularity cylindricity detection device axis of workpiece location error compensation method | |
| CN102589571B (en) | Spatial three-dimensional vision-computing verification method | |
| CN107339981A (en) | A kind of electronic tripod of engineering survey and quick centring flatening method | |
| CN113340241B (en) | Binocular vision concrete joint surface roughness measurement method and system | |
| CN107806843A (en) | Electron beam fuse increasing material manufacturing topography measurement device and its compensating control method | |
| CN113251925B (en) | Glue amount detection method and device based on area array laser | |
| CN101832737A (en) | HUD (Heads-Up Display) digitized boresight method applied to plane general assembly | |
| CN112710236A (en) | Method for measuring installation attitude of spacecraft high-precision instrument based on laser tracker | |
| CN113865570A (en) | Steel structure circular stand column verticality measuring method | |
| CN113324482B (en) | Indirect rapid measuring device and method for three-dimensional coordinates | |
| CN104251695A (en) | Laser centering measure system and centering measure method thereof | |
| CN113295095B (en) | High fill side slope geotechnical centrifugal model measurement control system | |
| CN111895921A (en) | Compensation model for improving measurement precision of system to height difference | |
| CN208350013U (en) | A kind of equipment that road is calibrated with laser ranging formula section tester high-precision calibrating | |
| CN105180827A (en) | Device for detecting crane main beam camber curve | |
| CN110779503B (en) | Three-dimensional precision control network measuring method | |
| CN106323587A (en) | Monocular video high precision measuring method for wing wind tunnel test model elastic deformation | |
| CN219071869U (en) | Quality control device for radiotherapy equipment laser positioning system and CT reconstruction system | |
| CN107860309B (en) | Method and device for improving measurement precision of laser tracker | |
| CN212645634U (en) | Automatic scanning and measuring device for volume of oil tank | |
| CN115752396A (en) | Building curtain wall measuring construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |