CN113790690B - Clamping posture adjusting system and adjusting method for linear displacement sensor for calibration - Google Patents
Clamping posture adjusting system and adjusting method for linear displacement sensor for calibration Download PDFInfo
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- CN113790690B CN113790690B CN202111362043.0A CN202111362043A CN113790690B CN 113790690 B CN113790690 B CN 113790690B CN 202111362043 A CN202111362043 A CN 202111362043A CN 113790690 B CN113790690 B CN 113790690B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims description 20
- 238000001514 detection method Methods 0.000 claims description 96
- 238000009434 installation Methods 0.000 claims description 14
- 238000012937 correction Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000012795 verification Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/047—Accessories, e.g. for positioning, for tool-setting, for measuring probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/045—Correction of measurements
Abstract
The invention belongs to the technical field of sensor metering calibration, and relates to a linear displacement sensor clamping posture adjustment system for calibration, which comprises a clamping platform, wherein the height, the inclination angle and the circumferential rotation angle of the clamping platform are adjustable, and the positions of the clamping platform on a two-dimensional plane are adjustable; the first clamping assembly is used for clamping the linear displacement sensor to be calibrated and is positioned on the upper side of the clamping platform and detachably connected with the clamping platform; the second clamping assembly is arranged on one side of the first clamping assembly; the two-dimensional position sensor is arranged on the second clamping assembly and is opposite to the linear displacement sensor to be calibrated; and the controller is electrically connected with the clamping platform and the two-dimensional position sensor respectively. The invention solves the problem of difficult posture adjustment in the calibration of the high-precision linear displacement sensor, reduces the influence of measurement errors caused by small deviation of the clamping posture of the sensor on the calibration precision, improves the calibration precision and the calibration efficiency of the linear displacement sensor, and reduces the degree of dependence on the experience of operators.
Description
Technical Field
The invention belongs to the technical field of sensor metering calibration, and particularly relates to a clamping posture adjusting system and method for a linear displacement sensor for calibration.
Background
A linear displacement sensor (Linear displacement sensor) is a device that senses a change in length dimension and converts it into a usable output signal. The linear displacement sensor can be used for measuring the length dimensions of displacement, distance, position, and strain quantity, and is widely applied to engineering test. The linear displacement sensor has various output signal types, and can be divided into an inductance type displacement sensor, a strain type displacement sensor, a laser displacement sensor, a stay wire type displacement sensor and the like according to the structure and the sensitivity principle.
In order to ensure that the output displacement length of the linear displacement sensor serving as a metering appliance can be traced to a national standard, a legal metering and verification mechanism performs metering calibration on the linear displacement sensor according to the JJF1305-2011 'linear displacement sensor calibration Specification', and the method comprises the following steps: the calibrated linear displacement sensor is mounted on a fixed position of the sensor detection stage, and displacement is applied to the calibrated linear displacement sensor through a moving end of the sensor detection stage. The sensor detection table in the method can be special self-grinding equipment, and can also be used for carrying out metering calibration on the linear displacement sensor by utilizing instruments such as a length measuring instrument or a length measuring machine.
In order to ensure the calibration accuracy of the linear displacement sensor, when the method is used for calibration, the installation of the sensor should meet Abbe's principle as much as possible, namely the displacement detection direction of the calibrated linear displacement sensor should be parallel to the moving axis of the moving end of the detection table of the universal sensor so as to reduce measurement errors.
At present, for clamping and posture adjustment of a linear displacement sensor at a fixed end of a displacement detection table, a visual auxiliary and manual adjustment mode is generally adopted, and for a linear displacement sensor with common precision, abbe errors caused by small errors which are not visible by naked eyes of the posture of the sensor are extremely small, so that the final calibration result is not greatly influenced. However, in the case of a high-precision linear displacement sensor, the abbe error due to a small deviation in the sensor posture is not negligible, and therefore, in the case of adjustment for the high-precision linear displacement sensor, the requirement for adjustment is higher, and therefore, there is a problem that the calibration efficiency is necessarily low.
Disclosure of Invention
In view of the above, the present invention provides a clamping posture adjustment system and an adjustment method for a linear displacement sensor for calibration, so as to solve the above-mentioned technical problems.
The technical scheme of the invention is as follows:
a linear displacement sensor clamping attitude adjustment system for calibration, comprising:
the clamping platform is adjustable in height, inclination angle, circumferential rotation angle and position on a two-dimensional plane;
the first clamping assembly is used for clamping the linear displacement sensor to be calibrated and is positioned on the upper side of the clamping platform and detachably connected with the clamping platform;
the second clamping assembly is arranged on one side of the first clamping assembly;
the two-dimensional position sensor is arranged on the second clamping assembly and is opposite to the linear displacement sensor to be calibrated;
and the controller is electrically connected with the clamping platform and the two-dimensional position sensor respectively.
Preferably, the method further comprises:
the laser is positioned on the first clamping assembly and detachably connected with the first clamping assembly, and the laser is electrically connected with the controller.
Preferably, the device further comprises a detection table, and the clamping platform and the second clamping assembly are respectively arranged on two sides of the detection table.
Preferably, the detection platform comprises a base, one side of the base is fixed with a first installation block, the base upper surface is provided with a groove body, the groove body is provided with two brackets along the length direction of the base, two brackets are symmetrically arranged in the groove body, a screw rod is arranged on each bracket, one end of the screw rod is connected with a motor, the motor is electrically connected with the controller, a nut seat is sleeved on the screw rod, a second installation block is fixed on the nut seat, the second installation block is connected with the base upper surface through a guide assembly, a clamping platform is detachably connected with the first installation block, and a second clamping assembly is detachably connected with the second installation block.
Preferably, the guide assembly comprises two sliding grooves symmetrically formed in the upper surface of the base body, the two sliding grooves are respectively located on two sides of the groove body, a sliding block is respectively clamped in the two sliding grooves, and the sliding block is fixed with the second installation block.
The adjustment method of the clamping gesture adjustment system of the linear displacement sensor for calibration comprises the following steps:
s1, preparing a system and roughly adjusting the posture of a linear displacement sensor to be calibrated;
s2, starting a motor to enable the second clamping assembly to drive the two-dimensional position sensor to move for a certain distance to reach a first position, resetting the displacement value of the detection table, and reading position data1 fed back by the two-dimensional position sensor; starting the motor again, so that the second clamping assembly drives the two-dimensional position sensor to move a certain distance, and then the second clamping assembly reaches a second position, and reading the displacement value of the detection table and position data2 fed back by the two-dimensional position sensor; the controller receives and stores data of data1 and data2, performs coordinate analysis on position points of the two-dimensional position sensor through the data of the data1 and the data2, calculates attitude pitching deviation and rotation deviation of the linear displacement sensor to be calibrated, generates a deviation correction control algorithm according to a coordinate analysis result, converts the deviation correction control algorithm into an executable motion control instruction, sends the executable motion control instruction to the clamping platform, and enables the clamping platform to perform corresponding motion to finish the attitude fine adjustment of the linear displacement sensor to be calibrated;
and S3, verifying the adjustment precision, if the adjustment precision is smaller than the adjustment precision upper threshold, finishing the adjustment, otherwise, returning to S2, continuing until the adjustment precision requirement is met, and sending an acousto-optic prompt by the controller, wherein the posture adjustment of the linear displacement sensor to be calibrated is finished.
Preferably, S1 comprises the steps of:
s11, fixing a clamping platform on a first mounting block, and fixing a linear displacement sensor to be calibrated on the clamping platform through a first clamping assembly, wherein the displacement detection direction is kept the same as the displacement output direction of a detection platform;
s12, fixing the second clamping assembly with the second mounting block, mounting the two-dimensional position sensor on the second clamping assembly, enabling a detection plane of the two-dimensional position sensor to face the clamping platform, keeping the detection plane of the two-dimensional position sensor perpendicular to the displacement output direction of the detection platform, and electrically connecting the clamping platform and the two-dimensional position sensor with the controller respectively;
s13, adjusting the height of the clamping platform to enable the center of the detection direction of the linear displacement sensor to be calibrated to be located in the center area of the detection plane of the two-dimensional position sensor in the vertical direction;
s14, observing whether the detection direction of the linear displacement sensor to be calibrated is approximately parallel to the displacement output direction of the detection table, and if large macroscopic deviation exists, loosening the first clamping assembly to readjust the position of the linear displacement sensor to be calibrated and then compacting again.
Preferably, S3 comprises the steps of:
recording the position data of the two-dimensional position sensor at the moment as data3, starting a motor, enabling the second clamping assembly to drive the two-dimensional position sensor to reversely move for a certain distance and then to reach a third position, and reading the displacement value of the detection table and the position data4 fed back by the two-dimensional position sensor; and the controller receives and stores data of data3 and data4, performs coordinate analysis on the position point of the two-dimensional position sensor through the data of the data3 and the data4, and completes adjustment if the unidirectional coordinate difference between dat3a and the data4 is smaller than a given adjustment precision upper threshold value.
Preferably, when the linear displacement sensor to be calibrated is a laser sensor, if the power of the output laser is matched with the two-dimensional position sensor, in S13, the output laser of the linear displacement sensor to be calibrated is adjusted to be located in the central area of the detection plane of the two-dimensional position sensor in the vertical direction; when the power of the output laser of the linear displacement sensor to be calibrated is not matched with the two-dimensional position sensor, replacing S13 with the following steps:
placing a laser on the first clamping assembly, and electrically connecting the laser with the controller; and adjusting the position of the laser, so that the emitting direction of the emitted light of the laser is parallel to the displacement detection direction of the linear displacement sensor to be calibrated, and adjusting the height of the clamping platform, so that the output laser of the laser is positioned in the central area of the detection plane of the two-dimensional position sensor in the vertical direction.
Preferably, when the linear displacement sensor to be calibrated is a pull-wire displacement sensor, S13 further comprises the following steps:
pulling out a pull wire of a linear displacement sensor to be calibrated, and fixing the end part of the pull wire to a second clamping assembly, so that the length direction of the pull wire is the same as the displacement output direction of the detection table;
placing a laser on the first clamping assembly, and electrically connecting the laser with the controller;
and adjusting the position of the laser, so that the emitting direction of the emitted light of the laser is parallel to the displacement detection direction of the linear displacement sensor to be calibrated, and adjusting the height of the clamping platform, so that the output laser of the laser is positioned in the central area of the detection plane of the two-dimensional position sensor in the vertical direction.
The clamping gesture adjusting system and the clamping gesture adjusting method for the linear displacement sensor are suitable for the current mainstream stay wire type and laser type high-precision linear displacement sensors, can be compatible with self-grinding special equipment used for calibration and universal instruments such as a length measuring instrument or a length measuring machine, solve the problem of difficult gesture adjustment in the calibration of the high-precision linear displacement sensor, can realize accurate, quick and automatic adjustment of the gesture of the calibrated linear sensor, break the current situation of visual assistance and manual adjustment of the gesture of the sensor at the current stage, can obviously reduce the influence of measurement errors caused by small deviation of the clamping gesture of the sensor on the calibration precision, obviously improve the calibration precision and the calibration efficiency of the linear displacement sensor, reduce the dependency degree on experience of operators, have strong practicability and are worth popularizing.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a diagram showing the calibration of a pull-wire linear displacement sensor according to the present invention;
fig. 3 is a diagram for explaining the definition of a coordinate system of a clamping platform 4 of the linear displacement sensor clamping posture adjustment system for calibration;
FIG. 4 is a schematic diagram of an attitude adjustment principle according to an embodiment of the present invention;
fig. 5 is a view showing a state of use when the laser type linear displacement sensor is calibrated by using the present invention.
Reference numerals illustrate:
the device comprises a laser, a first clamping assembly, a linear displacement sensor to be calibrated, a 4-clamping platform, a first mounting block, a 6-detection platform, a second mounting block, a second clamping assembly, a 9-two-dimensional position sensor and a 10-controller, wherein the first clamping assembly is arranged on the laser, the second clamping assembly is arranged on the linear displacement sensor to be calibrated, and the second clamping assembly is arranged on the linear displacement sensor to be calibrated.
Detailed Description
The invention provides a clamping posture adjusting system and a clamping posture adjusting method for a linear displacement sensor for calibration, and the invention is described below with reference to the structural schematic diagrams of fig. 1 to 5.
The clamping posture adjusting system of the linear displacement sensor for calibration comprises a clamping platform 4, wherein the height, the inclination angle, the circumferential rotation angle and the position on a two-dimensional plane of the clamping platform 4 are adjustable as shown in fig. 1, 2, 3 and 5; the upper side of the clamping platform 4 is provided with a first clamping assembly 2, the first clamping assembly 2 is used for clamping a linear displacement sensor 3 to be calibrated, and the linear displacement sensor 3 to be calibrated is detachably connected to the clamping platform 4 through the first clamping assembly 2.
The second clamping assembly 8 is arranged on one side of the first clamping assembly 2, a two-dimensional position sensor 9 is arranged on the second clamping assembly 8, the two-dimensional position sensor 9 is arranged opposite to the linear displacement sensor 3 to be calibrated, and the two-dimensional position sensor 9 and the clamping platform 4 are respectively and electrically connected with the controller 10.
Further, the device further comprises a laser 1 positioned on the first clamping assembly 2, the laser 1 is detachably connected with the first clamping assembly 2, and the laser 1 is electrically connected with the controller 10.
Further, the device also comprises a detection table 6, and the clamping platform 4 and the second clamping assembly 8 are respectively arranged on two sides of the detection table 6.
Further, the structure of the detection table 6 specifically includes a base, one side of the base is fixed with a first installation block 5, a groove body is formed in the upper surface of the base, the groove body is formed in the direction of the length of the base, two supports are symmetrically arranged in the groove body, a screw is arranged on each support, one end of the screw is connected with a motor, the motor is electrically connected with the controller 10, a nut seat is sleeved on the screw, a second installation block 7 is fixed on the nut seat, the second installation block 7 is connected with the upper surface of the base through a guide assembly, the clamping platform 4 is detachably connected with the first installation block 5, and the second clamping assembly 8 is detachably connected with the second installation block 7.
Further, the guiding component comprises two sliding grooves symmetrically formed in the upper surface of the base body, the two sliding grooves are respectively located on two sides of the base body, a sliding block is respectively clamped in the two sliding grooves, and the sliding block is fixed with the second installation block 7.
In use, the linear displacement sensor 3 to be calibrated can be fixed on the clamping platform 4 through the first clamping component 2, the clamping platform 4 is arranged on one side of the detection platform 6 and is connected with the first mounting block 5 through a screw, and the second clamping component 8 is arranged on the other side of the detection platform 6 and is connected with the second mounting block 7 through a screw. After the motor is started, the nut seat can be driven to move, so that the second mounting block 7 is synchronously driven to move on the detection table 6.
As shown in fig. 1, a clamping posture adjustment system for a linear displacement sensor for calibration is suitable for calibration of a pull-wire type linear displacement sensor and a laser type linear displacement sensor, and specific embodiments of the use method will be given below for each of the two sensors.
Example 1
As shown in fig. 1 to 3, the pull-wire type linear displacement sensor is used as a calibrated sensor, the clamping platform 4 is fixed on the first mounting block 5, the pull-wire type linear displacement sensor to be calibrated is fixed on the clamping platform 4 through the first clamping component 2, and the displacement detection direction of the pull-wire type linear displacement sensor is kept the same as the displacement output direction of the detection platform 6.
And observing whether the detection direction of the linear displacement sensor 3 to be calibrated is approximately parallel to the displacement output direction of the detection table 6, and if large macroscopic deviation exists, loosening the first clamping assembly 2 to readjust the position of the linear displacement sensor 3 to be calibrated and then compacting again.
The second clamping assembly 8 is fixed with the second mounting block 7, and the two-dimensional position sensor 9 is mounted on the second clamping assembly 8, so that the detection plane of the two-dimensional position sensor 9 faces the clamping platform 4, the detection plane of the two-dimensional position sensor 9 is kept perpendicular to the displacement output direction of the detection platform 6, in this embodiment perpendicular to the Y direction, and the clamping platform 4 and the two-dimensional position sensor 9 are respectively electrically connected with the controller 10.
As shown in fig. 2 and 3, the stay wire of the stay wire type linear displacement sensor to be calibrated is pulled out, and the end part of the stay wire is fixed on the second clamping assembly 8, so that the length direction of the stay wire is the same as the displacement output direction of the detection table 6; placing the laser 1 on the first clamping assembly 2, and electrically connecting the laser 1 with the controller 10; the position of the laser 1 is adjusted, so that the emitting direction of the emergent light of the laser 1 is parallel to the displacement detection direction of the linear displacement sensor 3 to be calibrated, and the height of the clamping platform 4 is adjusted, so that the output laser of the laser 1 is positioned in the central area of the detection plane of the two-dimensional position sensor 9 in the vertical direction.
As shown in fig. 4, the displacement deviation rectifying and adjusting process of the present patent is as follows: starting a motor, enabling the second clamping assembly 8 to drive the two-dimensional position sensor 9 to move for a certain distance to reach the first position P1, resetting the displacement value of the detection table 6, and reading position data1 fed back by the two-dimensional position sensor 9; starting the motor again, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move a certain distance, then the second clamping assembly reaches the second position P2, and reading the displacement value of the detection table 6 and the position data2 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores data of data1 and data2, performs coordinate analysis on position points of the two-dimensional position sensor 9 through the data of the data1 and the data2, calculates attitude pitching deviation and rotation deviation of the linear displacement sensor 3 to be calibrated, generates a deviation correction control algorithm according to a coordinate analysis result, converts the deviation correction control algorithm into an executable motion control instruction, sends the executable motion control instruction to the clamping platform 4, and the clamping platform 4 performs corresponding pitching, lifting or rotation adjustment movement to finish attitude fine adjustment of the linear displacement sensor 3 to be calibrated.
After the attitude fine adjustment is completed, adjustment accuracy verification is required:
recording the current position data of the two-dimensional position sensor 9 as data3, starting a motor, enabling the second clamping assembly 8 to drive the two-dimensional position sensor 9 to reversely move for a certain distance and then to reach a third position, and reading the displacement value of the detection table 6 and the position data4 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores the data of the data3 and the data4, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data of the data3 and the data4, completes adjustment if the unidirectional coordinate difference of the data3 and the data4 is smaller than a given adjustment precision upper threshold value, otherwise returns to the adjustment step until the adjustment precision requirement is met, and the controller 10 sends out an acousto-optic prompt.
Example 2
As shown in fig. 5, when the power of the output laser of the laser linear displacement sensor to be calibrated is matched with the two-dimensional position sensor 9, the following steps are adopted:
the clamping platform 4 is fixed on the first mounting block 5, the laser type linear displacement sensor to be calibrated is fixed on the clamping platform 4 through the first clamping assembly 2, and the laser emission direction of the laser type linear displacement sensor is kept the same as the displacement output direction of the detection platform 6.
The second clamping assembly 8 is fixed with the second mounting block 7, and the two-dimensional position sensor 9 is mounted on the second clamping assembly 8, so that the detection plane of the two-dimensional position sensor 9 faces the clamping platform 4, the detection plane of the two-dimensional position sensor 9 is kept perpendicular to the displacement output direction of the detection platform 6, in this embodiment perpendicular to the Y direction, and the clamping platform 4 and the two-dimensional position sensor 9 are respectively electrically connected with the controller 10.
As shown in fig. 5, the output laser of the laser type linear displacement sensor to be calibrated is adjusted to be located in the center area of the detection plane of the two-dimensional position sensor 9 in the vertical direction.
And observing whether the detection direction of the laser type linear displacement sensor to be calibrated is approximately parallel to the displacement output direction of the detection table 6, and if large macroscopic deviation exists, loosening the first clamping assembly 2 to readjust the position of the laser type linear displacement sensor to be calibrated and then compacting again.
As shown in fig. 4, the motor is started, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move a certain distance to reach the first position P1, the displacement value of the detection table 6 is cleared, and the position data1 fed back by the two-dimensional position sensor 9 are read; starting the motor again, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move a certain distance, then the second clamping assembly reaches the second position P2, and reading the displacement value of the detection table 6 and the position data2 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores data of data1 and data2, performs coordinate analysis on position points of the two-dimensional position sensor 9 through the data of the data1 and the data2, calculates attitude pitching deviation and rotation deviation of the laser type linear displacement sensor to be calibrated, generates a correction control algorithm according to a coordinate analysis result, converts the correction control algorithm into an executable motion control instruction, sends the executable motion control instruction to the clamping platform 4, and the clamping platform 4 performs corresponding pitching, lifting or rotation adjustment movement to finish attitude fine adjustment of the laser type linear displacement sensor to be calibrated.
After the attitude fine adjustment is completed, adjustment accuracy verification is required:
recording the current position data of the two-dimensional position sensor 9 as data3, starting a motor, enabling the second clamping assembly 8 to drive the two-dimensional position sensor 9 to reversely move for a certain distance and then to reach a third position, and reading the displacement value of the detection table 6 and the position data4 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores the data of the data3 and the data4, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data of the data3 and the data4, completes adjustment if the unidirectional coordinate difference of the data3 and the data4 is smaller than a given adjustment precision upper threshold value, otherwise returns to the adjustment step until the adjustment precision requirement is met, and the controller 10 sends out an acousto-optic prompt.
Example 3
As shown in fig. 5, when the power of the output laser of the laser linear displacement sensor to be calibrated is not matched with the two-dimensional position sensor 9, the following steps are adopted:
the clamping platform 4 is fixed on the first mounting block 5, the laser type linear displacement sensor to be calibrated is fixed on the clamping platform 4 through the first clamping assembly 2, and the laser emission direction of the laser type linear displacement sensor is kept the same as the displacement output direction of the detection platform 6.
And observing whether the detection direction of the laser type linear displacement sensor to be calibrated is approximately parallel to the displacement output direction of the detection table 6, and if large macroscopic deviation exists, loosening the first clamping assembly 2 to readjust the position of the laser type linear displacement sensor to be calibrated and then compacting again.
The second clamping assembly 8 is fixed with the second mounting block 7, and the two-dimensional position sensor 9 is mounted on the second clamping assembly 8, so that the detection plane of the two-dimensional position sensor 9 faces the clamping platform 4, the detection plane of the two-dimensional position sensor 9 is kept perpendicular to the displacement output direction of the detection platform 6, in this embodiment perpendicular to the Y direction, and the clamping platform 4 and the two-dimensional position sensor 9 are respectively electrically connected with the controller 10.
As shown in fig. 5, the laser 1 is placed on the first clamping assembly 2, and the laser 1 is electrically connected with the controller 10; the position of the laser 1 is adjusted, so that the emitting direction of the emitted light of the laser 1 is parallel to the displacement detection direction of the laser linear displacement sensor to be calibrated, and the height of the clamping platform 4 is adjusted, so that the output laser of the laser 1 is positioned in the central area of the detection plane of the two-dimensional position sensor 9 in the vertical direction.
As shown in fig. 4, the motor is started, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move a certain distance to reach the first position P1, the displacement value of the detection table 6 is cleared, and the position data1 fed back by the two-dimensional position sensor 9 are read; starting the motor again, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move a certain distance, then the second clamping assembly reaches the second position P2, and reading the displacement value of the detection table 6 and the position data2 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores data of data1 and data2, performs coordinate analysis on position points of the two-dimensional position sensor 9 through the data of the data1 and the data2, calculates attitude pitching deviation and rotation deviation of the laser type linear displacement sensor to be calibrated, generates a correction control algorithm according to a coordinate analysis result, converts the correction control algorithm into an executable motion control instruction, sends the executable motion control instruction to the clamping platform 4, and the clamping platform 4 performs corresponding pitching, lifting or rotation adjustment movement to finish attitude fine adjustment of the laser type linear displacement sensor to be calibrated.
After the attitude fine adjustment is completed, adjustment accuracy verification is required:
recording the current position data of the two-dimensional position sensor 9 as data3, starting a motor, enabling the second clamping assembly 8 to drive the two-dimensional position sensor 9 to reversely move for a certain distance and then to reach a third position, and reading the displacement value of the detection table 6 and the position data4 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores the data of the data3 and the data4, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data of the data3 and the data4, completes adjustment if the unidirectional coordinate difference of the data3 and the data4 is smaller than a given adjustment precision upper threshold value, otherwise returns to the adjustment step until the adjustment precision requirement is met, and the controller 10 sends out an acousto-optic prompt.
The clamping gesture adjusting system and the clamping gesture adjusting method for the linear displacement sensor provided by the invention solve the problem of difficult gesture adjustment in the process of calibrating the high-precision linear displacement sensor, can realize accurate, rapid and automatic adjustment of the gesture of the calibrated linear displacement sensor, are suitable for the current mainstream of the wire-pulling type and laser type high-precision linear displacement sensor, can be compatible with self-grinding special equipment used for calibration and universal instruments such as a length measuring instrument or a length measuring machine, break the current situation of visual assistance and manual adjustment of the gesture of the sensor at the current stage, can obviously reduce the influence of measurement errors caused by small deviation of the clamping gesture of the sensor on the calibration precision, obviously improve the calibration precision and the calibration efficiency of the linear displacement sensor, reduce the dependency degree on the experience of operators, have strong practicability and are worth popularizing.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations within the scope of the present invention will be apparent to those skilled in the art.
Claims (9)
1. The utility model provides a linear displacement sensor clamping gesture adjustment system for calibration which characterized in that includes: the clamping platform (4) is adjustable in height, inclination angle, circumferential rotation angle and position on a two-dimensional plane; the first clamping assembly (2) is used for clamping the linear displacement sensor (3) to be calibrated, and the first clamping assembly (2) is positioned on the upper side of the clamping platform (4) and detachably connected with the clamping platform (4); the second clamping assembly (8) is arranged on one side of the first clamping assembly (2); the two-dimensional position sensor (9) is arranged on the second clamping assembly (8) and is opposite to the linear displacement sensor (3) to be calibrated; the controller (10) is electrically connected with the clamping platform (4) and the two-dimensional position sensor (9) respectively; the laser device (1) is positioned on the first clamping assembly (2), detachably connected with the first clamping assembly (2), electrically connected with the controller (10), and parallel to the displacement detection direction of the linear displacement sensor to be calibrated in the emergent light emission direction of the laser device, and comprises the following steps of: starting a motor to enable the second clamping assembly to drive the two-dimensional position sensor to move for a certain distance to reach a first position P1, resetting a displacement value of the detection table, and reading position data1 fed back by the two-dimensional position sensor; starting the motor again, so that the second clamping assembly drives the two-dimensional position sensor to move a certain distance, and then, the second clamping assembly reaches a second position P2, and reading the displacement value of the detection table and position data2 fed back by the two-dimensional position sensor; the controller receives and stores data of data1 and data2, coordinates analysis is carried out on position points of the two-dimensional position sensor through the data of the data1 and the data2, attitude pitching deviation and rotation deviation of the linear displacement sensor to be calibrated are calculated, a deviation correction control algorithm is generated according to a coordinate analysis result, the deviation correction control algorithm is converted into an executable motion control instruction and is sent to the clamping platform, the clamping platform carries out corresponding pitching, lifting or rotation adjustment movement to finish attitude fine adjustment of the linear displacement sensor to be calibrated, the two-dimensional position sensor (9) is mounted on the second clamping assembly (8), a detection plane of the two-dimensional position sensor (9) faces the clamping platform (4), the detection plane of the two-dimensional position sensor (9) is kept to be perpendicular to the displacement output direction of the detection platform (6), and the height of the clamping platform (4) is adjusted, so that output laser of the laser (1) is located in the central area of the detection plane of the two-dimensional position sensor (9) in the vertical direction.
2. The linear displacement sensor clamping posture adjustment system for calibration according to claim 1, further comprising a detection table (6), wherein the clamping platform (4) and the second clamping assembly (8) are respectively arranged on two sides of the detection table (6).
3. The linear displacement sensor clamping posture adjustment system for calibration according to claim 2, wherein the detection table (6) comprises a base body, a first mounting block (5) is fixed on one side of the base body, a groove body is formed in the upper surface of the base body, the groove body is formed in the length direction of the base body, two brackets are symmetrically arranged in the groove body, a screw is erected on the two brackets, one end of the screw is connected with a motor, the motor is electrically connected with the controller (10), a nut seat is sleeved on the screw, a second mounting block (7) is fixed on the nut seat, the second mounting block (7) is connected with the upper surface of the base body through a guide assembly, the clamping platform (4) is detachably connected with the first mounting block (5), and the second clamping assembly (8) is detachably connected with the second mounting block (7).
4. The system for adjusting the clamping posture of the linear displacement sensor for calibration according to claim 3, wherein the guide assembly comprises two sliding grooves symmetrically formed in the upper surface of the base body, the two sliding grooves are respectively formed in two sides of the groove body, a sliding block is respectively clamped in each sliding groove, and the sliding blocks are fixed with the second installation block (7).
5. A method of adjusting a linear displacement sensor clamping attitude adjustment system for calibration according to claim 3, comprising the steps of: s1, preparing a system and roughly adjusting the posture of a linear displacement sensor (3) to be calibrated; s2, starting a motor, enabling the second clamping assembly (8) to drive the two-dimensional position sensor (9) to move for a certain distance to reach a first position, resetting a displacement value of the detection table (6), and reading position data1 fed back by the two-dimensional position sensor (9); starting the motor again, so that the second clamping assembly (8) drives the two-dimensional position sensor (9) to move a certain distance again, then the motor reaches a second position, and reading the displacement value of the detection table (6) and the position data2 fed back by the two-dimensional position sensor (9); the controller (10) receives and stores data of data1 and data2, performs coordinate analysis on position points of the two-dimensional position sensor (9) through the data of the data1 and the data2, calculates attitude pitching deviation and rotation deviation of the linear displacement sensor (3) to be calibrated, generates a deviation correction control algorithm according to a coordinate analysis result, converts the deviation correction control algorithm into an executable motion control instruction, sends the executable motion control instruction to the clamping platform (4), and the clamping platform (4) performs corresponding motion to finish the attitude fine adjustment of the linear displacement sensor (3) to be calibrated; and S3, verifying the adjustment precision, if the adjustment precision is smaller than the adjustment precision upper threshold, finishing the adjustment, otherwise, returning to S2, continuing until the adjustment precision requirement is met, and sending out an acousto-optic prompt by the controller (10), wherein the posture adjustment of the linear displacement sensor (3) to be calibrated is finished.
6. The adjustment method of the linear displacement sensor clamping posture adjustment system for calibration according to claim 5, wherein S1 comprises the steps of: s11, fixing the clamping platform (4) on the first mounting block (5), and fixing the linear displacement sensor (3) to be calibrated on the clamping platform (4) through the first clamping assembly (2), wherein the displacement detection direction is kept the same as the displacement output direction of the detection platform (6); s12, fixing a second clamping assembly (8) and a second mounting block (7), mounting a two-dimensional position sensor (9) on the second clamping assembly (8), enabling a detection plane of the two-dimensional position sensor (9) to face the clamping platform (4), keeping the detection plane of the two-dimensional position sensor (9) perpendicular to the displacement output direction of the detection platform (6), and electrically connecting the clamping platform (4) and the two-dimensional position sensor (9) with a controller (10) respectively; s13, adjusting the height of the clamping platform (4) to enable the center of the detection direction of the linear displacement sensor (3) to be calibrated to be located in the center area of the detection plane of the two-dimensional position sensor (9) in the vertical direction; s14, observing whether the detection direction of the linear displacement sensor (3) to be calibrated is approximately parallel to the displacement output direction of the detection table (6), and if large macroscopic deviation exists, loosening the first clamping assembly (2) to readjust the position of the linear displacement sensor (3) to be calibrated and then compacting again.
7. The adjustment method of the linear displacement sensor clamping posture adjustment system for calibration according to claim 5, wherein S3 comprises the steps of: recording the position data of the two-dimensional position sensor (9) at the moment as data3, starting a motor, enabling the second clamping assembly (8) to drive the two-dimensional position sensor (9) to reversely move for a certain distance and then to reach a third position, and reading the displacement value of the detection table (6) and the position data4 fed back by the two-dimensional position sensor (9); the controller (10) receives and stores data of the data3 and the data4, performs coordinate analysis on the position point of the two-dimensional position sensor (9) through the data of the data3 and the data4, and completes adjustment if the unidirectional coordinate difference of the data3 and the data4 is smaller than a given adjustment precision upper threshold value.
8. The adjustment method of the clamping posture adjustment system of the linear displacement sensor for calibration according to claim 6, characterized in that when the linear displacement sensor (3) to be calibrated is a laser type sensor, if the power of the output laser is matched with the two-dimensional position sensor (9), in S13, the output laser of the linear displacement sensor (3) to be calibrated is adjusted to be located in the central area of the detection plane of the two-dimensional position sensor (9) in the vertical direction; when the power of the output laser of the linear displacement sensor (3) to be calibrated is not matched with the two-dimensional position sensor (9), replacing S13 by the following steps: placing a laser (1) on the first clamping assembly (2), and electrically connecting the laser (1) with a controller (10); the position of the laser (1) is adjusted, so that the emitting direction of the emitted light of the laser (1) is parallel to the displacement detection direction of the linear displacement sensor (3) to be calibrated, and the height of the clamping platform (4) is adjusted, so that the output laser of the laser (1) is positioned in the central area of the detection plane of the two-dimensional position sensor (9) in the vertical direction.
9. The adjustment method of a clamping posture adjustment system for a linear displacement sensor for calibration according to claim 6, wherein when the linear displacement sensor (3) to be calibrated is a pull-wire displacement sensor, S13 further comprises the steps of: pulling out a pull wire of a linear displacement sensor (3) to be calibrated, and fixing the end part of the pull wire to a second clamping assembly (8) so that the length direction of the pull wire is the same as the displacement output direction of a detection table (6); placing a laser (1) on the first clamping assembly (2), and electrically connecting the laser (1) with a controller (10); the position of the laser (1) is adjusted, so that the emitting direction of the emitted light of the laser (1) is parallel to the displacement detection direction of the linear displacement sensor (3) to be calibrated, and the height of the clamping platform (4) is adjusted, so that the output laser of the laser (1) is positioned in the central area of the detection plane of the two-dimensional position sensor (9) in the vertical direction.
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| CN114485371B (en) * | 2022-02-28 | 2023-08-25 | 深蓝汽车科技有限公司 | Stay wire mounting device of stay wire displacement sensor |
| CN116718355B (en) * | 2023-08-08 | 2023-10-13 | 陕西省计量科学研究院 | Retroreflection sample grade and pose adjusting device and method |
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