CN111043999A - Large-diameter pipeline diameter measuring system and measuring method thereof - Google Patents
Large-diameter pipeline diameter measuring system and measuring method thereof Download PDFInfo
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Abstract
The invention provides a large-diameter pipeline diameter measuring system which comprises four distance measuring sensors, a moving mechanism and a control calculation module, wherein the moving mechanism is provided with a through hole for a pipeline to be measured to pass through, the four distance measuring sensors are arranged around the through hole in a pairwise opposite mode, a connecting line between the two opposite distance measuring sensors passes through the center of the through hole, and the control calculation module is connected with the four distance measuring sensors and the moving mechanism. The invention also provides a measuring method of the large-caliber pipeline diameter measuring system. The invention can measure the pipe diameter of the large-caliber pipeline in real time, and has the advantages of simple realization, stable performance and low cost.
Description
Technical Field
The invention relates to the technical field of pipeline diameter measurement, in particular to a large-caliber pipeline diameter measuring system and a measuring method thereof.
Background
In the process of producing the pipeline, to carrying out the pipe diameter measurement to the heavy-calibre pipeline that is extruding, current edge projection method that adopts basically measures, need arrange projection measuring equipment around the pipeline, if have the requirement to the measurement accuracy of heavy-calibre pipeline, need arrange many projection measuring equipment around the pipeline, arrange projection measuring equipment in factory workshop, it is big to build the degree of difficulty, the calibration is loaded down with trivial details, and projection measuring equipment takes up an area of the space big expense height.
Disclosure of Invention
The invention aims to overcome the defects of large space requirement and high cost of measuring equipment when the pipe diameter of a large-diameter pipeline in extrusion production is measured, and provides a large-diameter pipeline diameter measuring system. The invention can measure the pipe diameter of the large-caliber pipeline in real time, and has the advantages of simple realization, stable performance and low cost.
The invention also aims to provide a measuring method of the large-caliber pipeline diameter measuring system.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a large-diameter pipeline diameter measuring system, wherein, includes four range finding sensors, moving mechanism, control calculation module, the last through-hole that supplies the pipeline to be measured to pass that is equipped with of moving mechanism, four two liang of relative settings of range finding sensors are in the through-hole is all around, and the line between two relative range finding sensors passes through the center of through-hole, control calculation module with four range finding sensors with moving mechanism connects. The pipe to be measured extruded in the production machine passes through the moving mechanism, the four distance measuring sensors on the moving mechanism measure the distance of the outer wall of the pipe, the measured data enters the control calculation module for calculation, and the control machine calculation module sends a moving instruction to the moving mechanism according to the calculation result, so that the moving mechanism moves integrally, the four distance measuring sensors on the moving mechanism are positioned on the pipe diameter extension line of the pipe to be measured, and the pipe diameter of the pipe to be measured is measured.
Furthermore, the moving mechanism is a square frame, the inner space of the square frame is the through hole, and the four distance measuring sensors are located at the middle points of the four sides of the square frame. The pipeline that awaits measuring alternates the through-hole of square frame inner space, and four range sensors carry out linear distance to the pipeline outer wall that awaits measuring that alternates and measure, and measuring result input control calculation module, moving mechanism receive the movement instruction that control calculation module sent, and moving mechanism wholly removes for four range sensors's position is just on the pipe diameter extension line of the pipeline that awaits measuring, makes four range sensors measure the pipe diameter of the pipeline that awaits measuring.
A measuring method of a large-caliber pipeline diameter measuring system comprises the following steps:
s1, inserting a pipeline to be measured into a through hole of a moving mechanism, and respectively measuring the distance between the four distance measuring sensors and the outer wall of the pipeline to be measured; setting a precision threshold value in a control calculation module according to the actual diameter measuring precision requirement, defining the direction of one group of two oppositely arranged distance measuring sensors in the four distance measuring sensors as a first direction, and positioning the direction of the other group of two oppositely arranged distance measuring sensors as a second direction;
s2, calculating and comparing the absolute value of the difference between two distances measured by the distance measuring sensors belonging to the same direction with a precision threshold value in a control calculation module by using a data processing algorithm, when the absolute value is greater than the precision threshold value, controlling the moving mechanism to move in the whole position by using the control calculation module, adjusting the positions of the outer wall of the pipeline to be measured by the four distance measuring sensors, and stopping the moving mechanism until the difference between the two distances measured by the distance measuring sensors belonging to the same direction is less than or equal to the precision threshold value;
and S3, when the absolute value is less than or equal to the precision threshold value, the four distance measuring sensors are positioned on the pipe diameter extension line of the pipeline to be measured, so that the pipe diameter of the pipeline to be measured can be measured, and the pipe diameter of the pipeline to be measured is measured.
Further, the data processing algorithm of the control calculation module in step S2 is:
s21, four distance measuring sensors are arranged to measure the pipeline to be measuredThe distances of the outer walls are a ', b', c 'and d', and the distance between the two distance measuring sensors in the first direction is k1Then the distance between two ranging sensors in the second direction is k2Setting a precision threshold h according to the actual diameter measuring precision requirement,
s22, when the absolute value of the difference between the sensor data in the first direction is smaller than or equal to the precision threshold, namely: | a '-c' | is ≦ h, the pipe diameter of the pipe in the second direction is the difference k between the sensor distance in the second direction and the absolute value of the sum of the instantaneous data of the two distance sensors in the second direction2-|b'+d'|，
S23, when the absolute value of the difference between the sensor data in the second direction is smaller than or equal to the precision threshold, namely: if | b '-d' | is ≦ h, the pipe diameter of the first direction of the pipe is the difference between the sensor distance in the first direction and the absolute value of the sum of the instantaneous data of the two distance sensors in the first direction, that is: k is a radical of1-|a'+c'|。
Further, when the control calculation module in step 22 obtains | a '-c' | > h, the control calculation module sends a moving instruction that the moving mechanism moves in the direction of the great distance measurement, the moving distance of the moving mechanism is the absolute value | a '-c' | of the difference between the distance measurement sensor data in the direction, and when the control calculation module in step 23 obtains | b '-d' | > h, the control calculation module sends a moving instruction that the moving mechanism moves in the direction of the great distance measurement, and the moving distance is the absolute value | b '-d' | of the difference between the distance measurement sensor data in the direction. Because the line of the distance measuring sensors in the first direction and the second direction passes through the center of the through hole, the position of the moving mechanism needs to be adjusted by sending a moving instruction through the control calculation module, so that the center of the through hole of the moving mechanism can coincide with the center of the pipeline to be measured, the distance measuring sensors in the first direction and the second direction can be located on the pipe diameter extension line of the pipeline to be measured, and the distance measuring sensors can measure the pipe diameter of the pipeline to be measured.
Furthermore, the method for measuring the large-caliber pipeline is suitable for the range of the pipe diameter of the pipeline to be measured between 80mm and 600 mm.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the four distance measuring sensors can quickly find the pipe diameter position of the pipe to be measured by controlling the matching of the calculation module and the moving mechanism, so that the pipe diameter of the pipe is measured; the hardware structure is simple, the floor area of the moving mechanism is small, the installation is flexible, and the cost is low; and setting a precision threshold value in the control calculation module, namely adjusting the measurement precision of the system.
Drawings
Fig. 1 is a schematic structural diagram of the moving mechanism of the present invention.
Fig. 2 is a schematic working diagram of a large-caliber pipeline diameter measuring system according to the present invention.
Fig. 3 is a flowchart illustrating steps of a measuring method of a large-diameter pipeline diameter measuring system according to the present invention.
The graphic symbols are illustrated as follows:
1-moving mechanism, 2-first distance measuring sensor, 3-second distance measuring sensor, 4-third distance measuring sensor, 5-fourth distance measuring sensor and 6-pipeline to be measured.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Example 1
Fig. 1 to 2 show an embodiment of a large-caliber pipeline diameter measuring system according to the present invention. A large-caliber pipeline diameter measuring system comprises a moving mechanism 1, four distance measuring sensors and a control calculation module. The four ranging sensors include a first ranging sensor 2, a second ranging sensor 3, a third ranging sensor 4, and a fourth ranging sensor 5. Wherein, first range finding sensor 1, second range finding sensor 2, third range finding sensor 3 and fourth range finding sensor 4 are located moving mechanism 1, and control calculation module is connected with moving mechanism 1, first range finding sensor 2, second range finding sensor 3, third range finding sensor 4 and fourth range finding sensor 5.
The moving mechanism 1 is a square frame, the first distance measuring sensor 2, the second distance measuring sensor 3, the third distance measuring sensor 4 and the fourth distance measuring sensor 5 are respectively arranged on the center point of the through hole of the square frame, and the four distance measuring sensors are located on the same plane. The pipe 6 to be measured passes through the middle of the moving mechanism.
The working principle of the embodiment is as follows: placing the moving mechanism 1 at the outlet of the pipe extruding equipment, enabling the formed pipe 6 to be detected to penetrate through the moving mechanism 1, enabling four ranging sensors on the moving mechanism 1 to measure the distance between the ranging sensors and the outer wall of the pipe 6 to be detected, inputting measured data into a control calculation module, setting a precision threshold value in the control calculation module, calculating the measured data by the control calculation module, combining the set precision threshold value, enabling the control calculation module to send a moving instruction to the moving mechanism 1, enabling the moving mechanism 1 to integrally move, and enabling the four ranging sensors to be located on the extension line of the pipe diameter of the pipe 6 to be detected in a pairwise mode.
Example 2
Referring to fig. 2 to 3, which illustrate an embodiment of the measuring method of the large-caliber pipeline diameter measuring system according to the present invention, a moving mechanism 1 is placed at an outlet of an apparatus for extruding a pipe, and a pipeline 6 to be measured is formed to pass through the moving mechanism 1. The precision threshold value is set to be h in the control calculation module, the first distance measurement sensor 2 measures the linear distance from the first distance measurement sensor to the outer wall of the pipeline 6 to be measured to be d ', the second distance measurement sensor 3 measures the linear distance from the second distance measurement sensor to the outer wall of the pipeline 6 to be measured to be a ', the third distance measurement sensor 4 measures the linear distance from the third distance measurement sensor to the outer wall of the pipeline 6 to be measured to be c ', and the fourth distance measurement sensor 5 measures the linear distance from the fourth distance measurement sensor to the outer wall of the pipeline 6 to. The linear distance between the first distance measuring sensor 2 and the fourth distance measuring sensor 5 in the moving mechanism 1 is k, and the linear distance between the second distance measuring sensor 3 and the third distance measuring sensor 4 is also k.
Data measured by the four distance measuring sensors are input into the control calculation module, the positions of the four distance measuring sensors are divided into a second direction and a first direction, and when the absolute value of the difference between the sensor data in the first direction is smaller than or equal to the precision threshold value, namely: if | a '-c' | ≦ h, the pipe diameter of the pipe 6 to be measured in the second direction is the difference (k- | b '+ d' |) between the sensor distance in the second direction and the absolute value of the sum of the instantaneous data of the two distance sensors in the second direction, and when the absolute value of the difference between the sensor data in the second direction is smaller than or equal to the precision threshold, that is: if | b '-d' | is ≦ h, the pipe diameter of the pipe 6 to be measured in the first direction is the difference between the sensor distance in the first direction and the absolute value of the sum of the instantaneous data of the two distance sensors in the first direction, that is: (k- | a '+ c' |).
If the control calculation module obtains | a '-c' | > h, the control calculation module sends a moving instruction that the moving mechanism moves towards the direction with large distance measurement, the moving distance of the moving mechanism 1 is the absolute value | a '-c' | of the difference of the distance measurement sensor data in the direction, and when the control calculation module obtains | b '-d' | > h, the control calculation module sends a moving instruction that the moving mechanism 1 moves towards the direction with large distance measurement, and the moving distance is the absolute value | b '-d' | of the difference of the distance measurement sensor data in the direction.
And the moving mechanism 1 after moving linearly measures the distance between the outer walls of the pipeline 6 to be measured again by the four distance measuring sensors, the calculation and the precision threshold value h are repeated for comparison, the moving mechanism 1 of the system is continuously moved until | a '-c' | is less than or equal to h and | b '-d' | is less than or equal to h, so that the four distance measuring sensors are determined to be positioned on the extension line of the pipe diameter of the pipeline to be measured pairwise, the pipe diameter of the pipeline is determined according to (k- | a '+ c' |) and (k- | b '+ d' |), and the out-of-roundness rate of the pipeline to be measured is calculated according to the two calculation results.
In this embodiment, the pipeline 6 to be measured is a pipeline being extruded, and the pipeline 6 to be measured moves in the moving mechanism in this embodiment, so this embodiment can perform real-time pipe diameter measurement on different pipe positions of the pipeline 6 to be measured, even if the pipeline 6 to be measured vibrates in the moving mechanism, because the calculation step occurs in the control calculation module, the control calculation module can quickly perform calculation and send a movement instruction, so the moving mechanism receives the instruction of the control calculation module to quickly make a position change of itself, determines the diameter position of the pipeline 6 to be measured, and measures the accurate pipe diameter of the pipeline to be measured.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. The utility model provides a heavy-calibre pipeline diameter measuring system which characterized in that: including four range finding sensors, moving mechanism, control calculation module, the last through-hole that supplies the pipeline to be measured to pass that is equipped with of moving mechanism, four two liang of relative settings of range finding sensors are in the through-hole is all around, and the line process between two relative range finding sensors the center of through-hole, control calculation module with four range finding sensors with moving mechanism connects.
2. The large caliber pipeline caliper system of claim 1, wherein: the moving mechanism is a square frame, the inner space of the square frame is the through hole, and the four distance measuring sensors are located on the middle points of the four sides of the square frame.
3. A measuring method of a large-caliber pipeline diameter measuring system is characterized by comprising the following steps: the method comprises the following steps:
s1, inserting a pipeline to be measured into a through hole of a moving mechanism, and respectively measuring the distance between the four distance measuring sensors and the outer wall of the pipeline to be measured; setting a precision threshold value in a control calculation module according to the actual diameter measuring precision requirement, defining the direction of one group of two oppositely arranged distance measuring sensors in the four distance measuring sensors as a first direction, and positioning the direction of the other group of two oppositely arranged distance measuring sensors as a second direction;
s2, calculating and comparing the absolute value of the difference between two distances measured by the distance measuring sensors belonging to the same direction with a precision threshold value in a control calculation module by using a data processing algorithm, when the absolute value is greater than the precision threshold value, controlling the moving mechanism to move in the whole position by using the control calculation module, adjusting the positions of the outer wall of the pipeline to be measured by the four distance measuring sensors, and stopping the moving mechanism until the difference between the two distances measured by the distance measuring sensors belonging to the same direction is less than or equal to the precision threshold value;
and S3, when the absolute value is less than or equal to the precision threshold value, the four distance measuring sensors are positioned on the pipe diameter extension line of the pipeline to be measured, so that the pipe diameter of the pipeline to be measured can be measured, and the pipe diameter of the pipeline to be measured is measured.
4. The measuring method of the large-caliber pipeline diameter measuring system according to claim 3, wherein the measuring method comprises the following steps: the data processing algorithm of the control calculation module in step S2 is:
s21, four distance measuring sensors are arranged to measure the distances a ', b', c 'and d' of the outer wall of the pipeline to be measured, and the distance between the two distance measuring sensors in the first direction is k1Then the distance between two ranging sensors in the second direction is k2Setting a precision threshold h according to the actual diameter measuring precision requirement,
s22, when the absolute value of the difference of the sensor data in the first direction is less than or equal to the precisionThe threshold value, namely: | a '-c' | is ≦ h, the pipe diameter of the pipe in the second direction is the difference k between the sensor distance in the second direction and the absolute value of the sum of the instantaneous data of the two distance sensors in the second direction2-|b'+d'|，
S23, when the absolute value of the difference between the sensor data in the second direction is smaller than or equal to the precision threshold, namely: if | b '-d' | is ≦ h, the pipe diameter of the first direction of the pipe is the difference between the sensor distance in the first direction and the absolute value of the sum of the instantaneous data of the two distance sensors in the first direction, that is: k is a radical of1-|a'+c'|。
5. The measuring method of the large-caliber pipeline diameter measuring system according to claim 4, wherein the measuring method comprises the following steps: when the control calculation module in the step 22 obtains | a '-c' | > h, the control calculation module sends a moving instruction that the moving mechanism moves in the direction with the large distance measurement, the moving distance of the moving mechanism is the absolute value | a '-c' | of the difference between the distance measurement sensor data in the direction, and when the control calculation module in the step 23 obtains | b '-d' | > h, the control calculation module sends a moving instruction that the moving mechanism moves in the direction with the large distance measurement, and the moving distance is the absolute value | b '-d' | of the difference between the distance measurement sensor data in the direction.
6. The measuring method of the large-caliber pipeline diameter measuring system according to claim 5, wherein the measuring method comprises the following steps: the method for measuring the large-caliber pipeline is suitable for the pipe diameter range of the pipeline to be measured between 80mm and 600 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112746913A (en) * | 2021-01-29 | 2021-05-04 | 湖北航天技术研究院总体设计所 | Detection system for composite shell contour of large solid rocket engine |
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