CN114415159A - Metering calibration method and device for shallow stratum profiler - Google Patents
Metering calibration method and device for shallow stratum profiler Download PDFInfo
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- CN114415159A CN114415159A CN202210077433.1A CN202210077433A CN114415159A CN 114415159 A CN114415159 A CN 114415159A CN 202210077433 A CN202210077433 A CN 202210077433A CN 114415159 A CN114415159 A CN 114415159A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52004—Means for monitoring or calibrating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses a measurement and calibration method of a shallow stratum profiler, which comprises the steps of measuring a depth measurement indicating value error, measuring a vertical resolution indicating value error and measuring a beam width indicating value error, and judging the shallow stratum profiler according to a measurement error result; the calibration device comprises a platform, the bottom end of the platform is fixedly connected with two walking parts, one walking part is fixedly connected with a speed adjusting part, the speed adjusting part is meshed with a power part, the top end of the power part is fixedly connected with the bottom end of the platform, the bottom end of the platform is fixedly connected with a rotary lifting mechanism, and the rotary lifting mechanism is positioned between the two walking parts; rotatory elevating system includes the rotating part, rotating part top and platform bottom fixed connection, rotating part bottom fixedly connected with telescopic link top, telescopic link bottom fixedly connected with seal shell, be provided with angle modulation portion in the seal shell, angle modulation portion top and telescopic link bottom fixed connection, angle modulation portion bottom can be dismantled and be connected with shallow stratum section appearance.
Description
Technical Field
The invention belongs to the technical field of submarine detection, and particularly relates to a method and a device for measuring and calibrating a shallow stratum profiler.
Background
The working principle of the shallow stratum profiler is that a transducer is controlled by a deck unit, periodically emits broadband sound wave pulses to the water bottom, generates transmission and reflection when the sound waves reach the water bottom and a stratum interface below the water bottom, return signals are transmitted to the deck unit through the transducer and a communication cable, and a water bottom stratum profile image is automatically drawn.
Disclosure of Invention
The invention aims to provide a method and a device for measuring and calibrating a shallow stratum profiler, which are used for solving the problems and achieving the purpose of conveniently measuring and calibrating the shallow stratum profiler.
In order to achieve the purpose, the invention provides the following scheme: a measurement and calibration method for a shallow stratum profiler comprises the steps of measuring depth measurement indicating value errors, measuring vertical resolution indicating value errors and measuring beam width indicating value errors, and judging the shallow stratum profiler according to the measuring error results.
Preferably, the measuring depth indicating error comprises the following steps:
s11, mounting the shallow stratum profiler at the bottom end of a rotary lifting mechanism of the calibrating device, enabling the acoustic axis direction of the transmitted beam to be parallel to the water surface, and vertically aligning the emitted beam to the reflecting surface of the short side wall of the test water tank;
s12, adjusting the rotary lifting mechanism to enable the shallow stratum profiler to enter water, and measuring the sound velocity by using a sound velocity profiler;
s13, selecting a detection point, erecting a total station around the test water tank, measuring the distance between the shallow stratum profiler and a reflection surface of the short side wall of the test water tank as a water depth standard reference value, comparing the measured value with the water depth measured value of the shallow stratum profiler, and calculating the depth measurement indicating value error;
and S14, taking the maximum absolute value of the depth indication error of each verification point as a verification result.
Preferably, the measuring of the vertical resolution indication error comprises the following steps:
s21, manufacturing and placing an underwater stratum section standard sample;
s22, mounting the shallow stratum profiler at the bottom end of the rotary lifting mechanism, and enabling the emission surface of the shallow stratum profiler to be vertically aligned with the underwater stratum profile standard sample;
s23, collecting and recording the detection data of the shallow stratum profiler on the underwater stratum profile standard sample;
s24, uniformly selecting 10 points on the underwater stratum profile standard sample to read the thickness of each layer sample, and calculating an arithmetic mean value as a vertical resolution indication value of the shallow stratum profiler;
s25, calculating the vertical resolution indicating error of the shallow stratum profiler according to the formula, and taking the maximum absolute value of the vertical resolution indicating error of each calibration point as a calibration result;
in the formula:
delta is the vertical resolution indication error of the shallow stratum profiler, unit: m;
d is the thickness of the underwater stratum section sample, unit: and m is selected.
Preferably, the measuring beam width indication error comprises the following steps:
s31, adjusting the emission fan of the shallow stratum profiler to be horizontal, enabling a standard hydrophone to be located in the emission fan of the shallow stratum profiler, and normally starting the equipment;
s32, adjusting the standard hydrophone to obtain open-circuit voltages at each angle position in the direction parallel to the flight path line;
s33, keeping the standard hydrophone static on the sound axis, and horizontally adjusting the sector rotation of the shallow stratum profiler to obtain open-circuit voltages at each angle position in the direction vertical to the flight path line;
and S34, drawing the directional diagram of the shallow layer profiler, calculating the beam width of the shallow layer profiler, making a difference with the nominal beam angle of the shallow layer profiler, and calculating an indication error.
A calibrating device for a shallow stratum profiler comprises a platform, wherein two walking parts are fixedly connected to the bottom end of the platform, a speed adjusting part is fixedly connected to one walking part, the speed adjusting part is meshed with a power part, the top end of the power part is fixedly connected with the bottom end of the platform, a rotary lifting mechanism is fixedly connected to the bottom end of the platform, and the rotary lifting mechanism is located between the two walking parts;
the rotary lifting mechanism comprises a rotating part, the top end of the rotating part is fixedly connected with the bottom end of the platform, the bottom end of the rotating part is fixedly connected with the top end of a telescopic rod, the bottom end of the telescopic rod is fixedly connected with a sealing shell, an angle adjusting part is arranged in the sealing shell, the top end of the angle adjusting part is fixedly connected with the bottom end of the telescopic rod, and the bottom end of the angle adjusting part is detachably connected with a shallow stratum profiler.
Preferably, the speed adjusting portion comprises a gear disc, the gear disc is fixedly connected with the traveling portion, a groove is formed in one side of the gear disc, the edge of the groove is of a tooth-shaped structure, a fourth gear is fixedly connected in the groove and is coaxially arranged with the gear disc, and the fourth gear is fixedly connected with the traveling portion.
Preferably, the power part comprises an air cylinder, the top end of the air cylinder is fixedly connected with the bottom end of the platform, a first motor is fixedly connected with the piston end of the air cylinder, an output shaft of the first motor is connected with a first gear in a shaft mode, the first gear is located between the edge of the fourth gear and the edge of the groove, and the fourth gear is in sliding contact with the bottom of the groove.
Preferably, the rotating part includes the second motor, the top of second motor with platform bottom fixed connection, the output shaft coupling of second motor has the second gear, one side of second motor is provided with connects the platform, connect the platform top with platform bottom fixed connection, it is connected with the third gear to connect the platform bottom to rotate, the third gear bottom with telescopic link top fixed connection, the second gear with the third gear meshes mutually.
Preferably, the angle adjustment portion includes the third motor, the third motor with telescopic link bottom fixed connection, the output shaft coupling of third motor has first runner, be provided with the angle modulation axle under the third motor, the angle modulation axle with the sealed shell rotates and connects, fixedly connected with second runner on the angle modulation axle, first runner with the second runner corresponds the setting from top to bottom, first runner with the outside of second runner has been around having the belt, fixedly connected with connecting rod top is distinguished at angle modulation axle both ends, connecting rod bottom fixedly connected with fixed plate, the fixed plate bottom with shallow stratum profiler can dismantle the connection.
Preferably, the walking part includes the bracing piece of two vertical settings, the bracing piece top with platform bottom fixed connection, the bracing piece bottom is rotated and is connected with the pivot, the pivot both ends respectively fixedly connected with wheel, the pivot with toothed disc, fourth gear fixed connection, toothed disc, fourth gear are located two between the bracing piece.
The invention has the following technical effects:
by the calibration method disclosed by the invention, the depth measurement indication value, the vertical resolution indication value and the beam width indication value of the profiler can be calibrated, the accuracy of the measurement result of the profiler is ensured, the calibration device can be used for measuring and calibrating the shallow formation profiler, the normal work of the profiler and the accuracy of the measurement result are ensured, the arranged rotary lifting mechanism can send the transducer of the shallow formation profiler into water to complete the measurement and calibration work of the shallow formation profiler in a test water tank, the rotary part, the telescopic rod and the angle adjusting part work together to adjust each height and orientation angle of the transducer of the shallow formation profiler in the test water tank water, the measurement and calibration work of the profiler is completed comprehensively, the speed adjusting part can facilitate the whole device to rapidly reach the position of the test water tank, and the speed adjusting part can adjust the advancing speed of the device after the device reaches the test water tank, the device can stably advance at a low speed in the process of carrying out the measurement and calibration of the profiler, the influence of instability of the device in the moving process on a calibration result is reduced, and the power part provides power for the movement of the device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is another perspective view of the overall structure of the device of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a partial enlarged view of B in FIG. 2;
FIG. 5 is a schematic view of an angle adjustment portion of the apparatus of the present invention;
FIG. 6 is a schematic view of a cross-sectional standard sample of an underwater formation;
FIG. 7 is a schematic diagram of measuring depth indicating error;
FIG. 8 is a graph showing the error in the vertical resolution;
fig. 9 is a diagram illustrating the error of the measured beam width indication.
Wherein, 1, a platform; 2. a wheel; 3. a support bar; 4. a rotating shaft; 5. a gear plate; 6. a fourth gear; 7. a telescopic rod; 8. sealing the shell; 9. a shallow profiler; 10. a connecting rod; 11. a cylinder; 12. a first motor; 13. a first gear; 14. a second motor; 15. a second gear; 16. a connecting table; 17. a third gear; 18. a third motor; 19. a first runner; 20. a belt; 21. an angle adjusting shaft; 22. a second runner; 23. a fixing plate; 24. clay silt; 25. coarse sand; 26. a rock; 27. an organic glass fence; 28. a total station; 29. a standard hydrophone; 30. an underwater acoustic measurement system; 31. a sound wave propagation path; 32. test basin minor face lateral wall plane of reflection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-9, the invention discloses a method for metering and calibrating a shallow stratum profiler, which comprises the steps of measuring a depth measurement indicating value error, a vertical resolution indicating value error and a beam width indicating value error, judging the shallow stratum profiler 9 according to a measurement error result, if the shallow stratum profiler is qualified, issuing a verification certificate, and if the shallow stratum profiler is unqualified, issuing a verification result notice and noting an unqualified item.
Further optimizing the scheme, the step of measuring the sounding indication value error comprises the following steps:
s11, mounting the shallow stratum profiler 9 at the bottom end of the rotary lifting mechanism, making the acoustic axis direction of the emitted beam parallel to the water surface, and vertically aligning to the reflecting surface 32 of the short side wall of the test water tank; the length of the test water tank is not less than 40m, the width of the test water tank is not less than 3m, the depth of the test water tank is not less than 5m, the flatness of the tank wall is better than 1cm, and a silencing material is paved on the side wall of the test water tank;
s12, adjusting the rotary lifting mechanism to enable the depth of the shallow layer profiler 9 entering water to be 2.5m, uniformly selecting 6 measuring points on a sound wave propagation path with the depth of 2.5m, measuring the sound velocity by using a sound velocity profiler, and inputting an arithmetic mean value into acquisition software of the shallow layer profiler 9;
s13, selecting positions of 5m, 10m, 15m, 20m, 25m, 30m, 35m and 40m as water depth detection points, erecting a total station 28 around the test water tank, measuring the distance between the shallow stratum profiler 9 and the short-side wall reflecting surface 32 of the test water tank as a water depth standard reference value, comparing the measured value with the water depth measured value of the shallow stratum profiler 9, and calculating a depth measurement indication value error;
and S14, taking the maximum absolute value of the depth indication error of each verification point as a verification result.
Further optimizing the scheme, the measuring of the indicating error of the vertical resolution comprises the following steps:
s21, manufacturing and placing an underwater stratum section standard sample;
the underwater stratum section standard sample consists of clay silt 24, coarse sand 25, rock 26 and an organic glass fence 27, and is cuboid in shape, and the design dimensions are 100cm in length, 100cm in width and 20cm in thickness; the thicknesses of the clay silt 24, the coarse sand 25 and the rock 26 are not less than 200 mm; the particle size range of the clay silt 24 is 0.004mm-0.062 mm; the particle size range of the coarse sand 25 is 0.062mm-2.0 mm; the flatness is better than 2 mm.
The method for manufacturing the standard sample of the underwater stratum section comprises the following steps:
the rock 26 is professionally cut and polished and fixed at the bottom of the organic glass fence 27;
selecting coarse sand 25 with the particle size within the range of 0.062mm-2.0mm by adopting a standard particle size screen, fully washing and infiltrating the coarse sand 25, paving the coarse sand above a rock 26, leveling the surface of the coarse sand 25 and pasting and sealing a plastic film;
selecting clay silt 24 with the particle size within the range of 0.00-0.062 mm by adopting a standard particle size screen, paving the clay silt 24 above coarse sand 25, leveling the surface of the clay silt 24 and pasting and sealing a plastic film.
The thickness measurement method of the standard sample of the underwater stratum profile comprises the following steps:
tracing the thickness and the flatness of the rock 26 to the measurement standards such as a three-coordinate measuring machine and the like;
and 8 measuring points are uniformly selected along the periphery of the organic glass fence 27, the thickness and the flatness of the clay silt 24 and the coarse sand 25 are measured by adopting a steel ruler, and the uncertainty of the measurement is evaluated.
Further, horizontally and slowly putting the standard sample of the underwater stratum profile into water and standing for 10min to ensure that the standard sample is not deformed;
further, the sound velocity of the water body is measured by using a sound velocity profiler, and the sound velocity is input into a shallow stratum profiler 9;
s22, mounting the shallow stratum profiler 9 at the bottom end of the rotary lifting mechanism, enabling the emission surface of the shallow stratum profiler 9 to be vertically aligned with the underwater stratum profile standard sample, controlling the depth of the shallow stratum profiler 9 entering water to be 1m, and enabling the vertical distance between the emission surface of the shallow stratum profiler 9 and the surface of the underwater stratum standard sample to be larger than the measurement blind area of the shallow stratum profiler 9;
s23, collecting and recording the detection data of the shallow stratum profiler 9 on the underwater stratum profile standard sample;
s24, uniformly selecting 10 points on the standard sample of the underwater stratum profile to read the thickness of each layer sample, and calculating the arithmetic mean value as the vertical resolution indication value of the shallow stratum profiler 9;
s25, calculating the vertical resolution indicating error of the shallow stratum profiler 9 according to the formula (1), and taking the maximum absolute value of the vertical resolution indicating error of each verification point as a verification result;
in the formula:
Δ is the vertical resolution indication error of the shallow profiler 9 in units: m;
d is the thickness of the underwater stratum section sample, unit: and m is selected.
In a further optimization scheme, the measurement of the beam width indicating error comprises the following steps:
s31, adjusting the emission sector of the shallow layer profiler 9 to be horizontal, enabling the standard hydrophone 29 to be located in the emission sector of the shallow layer profiler 9, and normally starting the equipment;
s32, lifting and adjusting the standard hydrophone 29 at a step interval of 0.5cm to obtain open-circuit voltages at each angle position in the direction parallel to the flight path line;
s33, keeping the standard hydrophone 29 stationary on the sound axis, and horizontally adjusting the shallow stratum profiler 9 to rotate in a sector mode at a step interval of 0.1 degree to obtain open-circuit voltages at each angle position in the direction perpendicular to the flight path line;
s34, drawing a directional diagram of the shallow layer profiler 9 according to the method specified in GB/T7965, calculating the beam width of the shallow layer profiler 9, making a difference with the nominal beam angle of the shallow layer profiler 9, and calculating the indication value error.
A calibrating device for a shallow stratum profiler comprises a platform 1, wherein the bottom end of the platform 1 is fixedly connected with two walking parts, one walking part is fixedly connected with a speed adjusting part, the speed adjusting part is meshed with a power part, the top end of the power part is fixedly connected with the bottom end of the platform 1, the bottom end of the platform 1 is fixedly connected with a rotary lifting mechanism, and the rotary lifting mechanism is positioned between the two walking parts;
rotatory elevating system includes the rotating part, rotating part top and 1 bottom fixed connection of platform, and 7 tops of rotating part bottom fixedly connected with telescopic link, 7 bottom fixedly connected with seal shells 8 of telescopic link, be provided with angle modulation portion in the seal shell 8, angle modulation portion top and 7 bottom fixed connection of telescopic link, angle modulation portion bottom can be dismantled and be connected with shallow stratum section appearance 9.
The shallow stratum profiler calibrating device disclosed by the invention can carry out metering calibration on a shallow stratum profiler, the normal work of the profiler and the accuracy of a measuring result are ensured, the arranged rotary lifting mechanism can send the transducer forming the shallow stratum profiler 9 into water to finish the metering calibration work of the shallow stratum profiler 9 in a test water tank, the rotary part, the telescopic rod 7 and the angle adjusting part work together to adjust each height and orientation angle of the shallow stratum profiler 9 in the test water tank, the metering calibration work of the profiler is completed comprehensively, the speed adjusting part can facilitate the whole device to reach the position of the test water tank quickly, the speed adjusting part adjusts the advancing speed of the device after the device reaches the test water tank, the device can be ensured to advance stably at a lower speed in the process of metering calibration of the profiler, and the influence of instability of the moving process of the device on the calibration result is reduced, the power portion provides power for the removal of device, and telescopic link 7 is electric telescopic handle, and electric telescopic handle is prior art, no longer describes.
Further optimize the scheme, speed regulation portion includes toothed disc 5, toothed disc 5 and walking portion fixed connection, and toothed disc 5 one side is seted up flutedly, and the recess edge sets up to the profile of tooth structure, fixedly connected with fourth gear 6 in the recess, fourth gear 6 and the coaxial setting of toothed disc 5, fourth gear 6 and walking portion fixed connection.
The power part is meshed with the fourth gear 6, so that the whole device can be rapidly moved to a test water tank, and after the power part is meshed with the edge of the groove of the gear disc 5, the device can move at a low speed, and the calibration work of the shallow stratum profiler 9 is completed.
Further optimize the scheme, power portion includes cylinder 11, the top and the 1 bottom fixed connection of platform of cylinder 11, the piston end fixed connection of cylinder 11 has first motor 12, and the output shaft coupling of first motor 12 has first gear 13, and first gear 13 is located between the edge of fourth gear 6 and the edge of recess, and fourth gear 6 and the bottom sliding contact of recess.
The first motor 12 works to drive the first gear 13 to rotate, the first gear 13 rotates to provide power for the forward movement of the device, the air cylinder 11 is communicated with an external air source (not shown in the figure), and the first motor 12 and the first gear 13 can be driven to move up and down through the stretching of the air cylinder 11, so that the forward speed of the whole device can be adjusted.
Further optimize the scheme, the rotating part includes second motor 14, the top and the 1 bottom fixed connection of platform of second motor 14, the output shaft coupling of second motor 14 has second gear 15, one side of second motor 14 is provided with connects platform 16, connect 16 tops and the 1 bottom fixed connection of platform, connect 16 bottoms to rotate and be connected with third gear 17, third gear 17 bottom and 7 top fixed connection of telescopic link, second gear 15 meshes with third gear 17 mutually.
Further optimize the scheme, angle modulation portion includes third motor 18, third motor 18 and 7 bottom fixed connection of telescopic link, the output shaft coupling of third motor 18 has first runner 19, be provided with angle modulation axle 21 under the third motor 18, angle modulation axle 21 rotates with sealed shell 8 and is connected, fixedly connected with second runner 22 on the angle modulation axle 21, first runner 19 corresponds the setting from top to bottom with second runner 22, first runner 19 has 20 with the outside of second runner 22 around having, angle modulation axle 21 both ends are fixedly connected with connecting rod 10 top respectively, connecting rod 10 bottom fixedly connected with fixed plate 23, fixed plate 23 bottom can be dismantled with shallow stratum section plotter 9 and be connected.
The combined action of rotating part, telescopic link 7 and angle adjustment portion can adjust each height and orientation angle of shallow stratum section appearance 9 in experimental basin, realizes the measurement calibration work of depth measurement indicating value, vertical resolution indicating value and beam width indicating value of shallow stratum section appearance 9.
Further optimize the scheme, the walking portion includes the bracing piece 3 of two vertical settings, 3 tops of bracing piece and 1 bottom fixed connection of platform, and 3 bottoms of bracing piece are rotated and are connected with pivot 4, and 4 both ends of pivot are fixedly connected with wheel 2 respectively, and pivot 4 and toothed disc 5, fourth gear 6 fixed connection, and toothed disc 5, fourth gear 6 are located between two bracing pieces 3.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. A shallow stratum profiler measurement calibration method is characterized by comprising the steps of measuring depth indicating value errors, measuring vertical resolution indicating value errors and measuring beam width indicating value errors, and judging a shallow stratum profiler (9) according to the measuring error results.
2. The method for calibrating a shallow profiler metrology calibration device as claimed in claim 1, wherein said measuring depth reading error comprises the steps of:
s11, mounting the shallow stratum profiler (9) at the bottom end of a rotary lifting mechanism of a calibrating device, enabling the acoustic axis direction of the emitted wave beam to be parallel to the water surface, and vertically aligning the emitted wave beam with the reflecting surface of the short side wall of the test water tank;
s12, adjusting the rotary lifting mechanism to enable the shallow stratum profiler (9) to enter water, and measuring the sound velocity by using a sound velocity profiler;
s13, selecting a detection point, erecting a total station (28) at the periphery of the test water tank, measuring the distance between the shallow stratum profiler (9) and a short-side wall reflecting surface (32) of the test water tank as a water depth standard reference value, comparing the measured value with the water depth measured value of the shallow stratum profiler (9), and calculating the depth measurement indication value error;
and S14, taking the maximum absolute value of the depth indication error of each verification point as a verification result.
3. The method for calibrating the shallow profiler metrology calibration device as claimed in claim 2, wherein said measuring the vertical resolution index error comprises the steps of:
s21, manufacturing and placing an underwater stratum section standard sample;
s22, mounting the shallow layer profiler (9) at the bottom end of the rotary lifting mechanism, and vertically aligning the emission surface of the shallow layer profiler (9) with the underwater stratum profile standard sample;
s23, collecting and recording the detection data of the shallow stratum profiler (9) on the underwater stratum profile standard sample;
s24, uniformly selecting 10 points on the underwater stratum profile standard sample to read the thickness of each layer sample, and calculating an arithmetic mean value as a vertical resolution indication value of the shallow stratum profiler (9);
s25, calculating the vertical resolution indicating error of the shallow stratum profiler (9) according to the formula (1), and taking the maximum absolute value of the vertical resolution indicating error of each calibration point as a calibration result;
in the formula:
delta is the vertical resolution indication error of the shallow stratum profiler (9), and the unit is as follows: m;
d is the thickness of the underwater stratum section sample, unit: and m is selected.
4. The method for calibrating a shallow profiler metrology calibration device as claimed in claim 3, wherein said measuring the beamwidth indication error comprises the steps of:
s31, adjusting the emission fan of the shallow layer profiler (9) to be horizontal, enabling a standard hydrophone (29) to be located in the emission fan of the shallow layer profiler (9), and normally starting the equipment;
s32, adjusting the standard hydrophone (29) to obtain open-circuit voltages at each angle position in the direction parallel to the air trace line;
s33, keeping the standard hydrophone (29) stationary on the sound axis, and horizontally adjusting the sector rotation of the shallow stratum profiler (9) to obtain open-circuit voltages at various angular positions in the direction vertical to the flight path line;
and S34, drawing a directivity diagram of the shallow layer profiler (9), calculating the beam width of the shallow layer profiler (9), and calculating an indication error by making a difference between the beam width and the nominal beam angle of the shallow layer profiler (9).
5. The calibrating device for the metering calibration method of the shallow stratum profiler is characterized by comprising a platform (1), wherein two walking parts are fixedly connected to the bottom end of the platform (1), a speed adjusting part is fixedly connected to one walking part, a power part is meshed with the speed adjusting part, the top end of the power part is fixedly connected with the bottom end of the platform (1), a rotary lifting mechanism is fixedly connected to the bottom end of the platform (1), and the rotary lifting mechanism is positioned between the two walking parts;
rotatory elevating system includes the rotating part, the rotating part top with platform (1) bottom fixed connection, rotating part bottom fixedly connected with telescopic link (7) top, telescopic link (7) bottom fixedly connected with seal shell (8), be provided with angle modulation portion in seal shell (8), angle modulation portion top with telescopic link (7) bottom fixed connection, angle modulation portion bottom can be dismantled and be connected with shallow stratum section appearance (9).
6. The calibrating device for the shallow layer profiler according to claim 5, wherein the speed adjusting part comprises a gear disc (5), the gear disc (5) is fixedly connected with the walking part, a groove is formed in one side of the gear disc (5), the edge of the groove is provided with a tooth-shaped structure, a fourth gear (6) is fixedly connected in the groove, the fourth gear (6) and the gear disc (5) are coaxially arranged, and the fourth gear (6) is fixedly connected with the walking part.
7. The calibration device for the shallow layer profiler according to claim 6, wherein the power part comprises a cylinder (11), the top end of the cylinder (11) is fixedly connected with the bottom end of the platform (1), the piston end of the cylinder (11) is fixedly connected with a first motor (12), the output shaft of the first motor (12) is coupled with a first gear (13), the first gear (13) is located between the edge of the fourth gear (6) and the edge of the groove, and the fourth gear (6) is in sliding contact with the bottom of the groove.
8. The calibration device for the shallow layer profiler as claimed in claim 5, characterized in that the rotating part comprises a second motor (14), the top end of the second motor (14) is fixedly connected with the bottom end of the platform (1), the output shaft of the second motor (14) is coupled with a second gear (15), one side of the second motor (14) is provided with a connecting table (16), the top end of the connecting table (16) is fixedly connected with the bottom end of the platform (1), the bottom end of the connecting table (16) is rotatably connected with a third gear (17), the bottom end of the third gear (17) is fixedly connected with the top end of the telescopic rod (7), and the second gear (15) is meshed with the third gear (17).
9. The calibration device for the shallow stratum profiler according to claim 5, wherein the angle adjusting part comprises a third motor (18), the third motor (18) is fixedly connected with the bottom end of the telescopic rod (7), an output shaft of the third motor (18) is coupled with a first rotating wheel (19), an angle adjusting shaft (21) is arranged right below the third motor (18), the angle adjusting shaft (21) is rotatably connected with the sealing shell (8), a second rotating wheel (22) is fixedly connected to the angle adjusting shaft (21), the first rotating wheel (19) and the second rotating wheel (22) are arranged up and down correspondingly, a belt (20) is wound around the outer sides of the first rotating wheel (19) and the second rotating wheel (22), the top end of a connecting rod (10) is respectively fixedly connected with two ends of the angle adjusting shaft (21), a fixing plate (23) is fixedly connected with the bottom end of the connecting rod (10), the bottom end of the fixing plate (23) is detachably connected with the shallow stratum profiler (9).
10. The calibrating device for the shallow layer profiler according to claim 6, wherein the walking part comprises two vertically arranged support rods (3), the top ends of the support rods (3) are fixedly connected with the bottom end of the platform (1), the bottom ends of the support rods (3) are rotatably connected with a rotating shaft (4), two ends of the rotating shaft (4) are respectively and fixedly connected with wheels (2), the rotating shaft (4) is fixedly connected with the gear disc (5) and the fourth gear (6), and the gear disc (5) and the fourth gear (6) are located between the two support rods (3).
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| US4282590A (en) * | 1979-08-13 | 1981-08-04 | Wingate Kenneth G | Adjustable position sonar transducer depth finder |
| WO2003065073A1 (en) * | 2002-01-28 | 2003-08-07 | Bjoerke Jan Terje | A method for field calibration of system parameters in a multibeam echo sounder system |
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