CN113790690A - Clamping attitude adjusting system and method for linear displacement sensor for calibration - Google Patents
Clamping attitude adjusting system and method for linear displacement sensor for calibration Download PDFInfo
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- CN113790690A CN113790690A CN202111362043.0A CN202111362043A CN113790690A CN 113790690 A CN113790690 A CN 113790690A CN 202111362043 A CN202111362043 A CN 202111362043A CN 113790690 A CN113790690 A CN 113790690A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims description 19
- 238000001514 detection method Methods 0.000 claims description 84
- 238000009434 installation Methods 0.000 claims description 15
- 238000012937 correction Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 6
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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
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Abstract
The invention belongs to the technical field of sensor metering calibration, and relates to a clamping attitude adjusting system of a linear displacement sensor for calibration, which comprises a clamping platform, wherein the height, the inclination angle, the circumferential rotation angle and the position on a two-dimensional plane of the clamping platform are adjustable; the first clamping assembly is used for clamping the linear displacement sensor to be calibrated, is positioned on the upper side of the clamping platform and is detachably connected with the clamping platform; the second clamping component is arranged on one side of the first clamping component; 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 dependence degree on the experience of operators.
Description
Technical Field
The invention belongs to the technical field of sensor measurement calibration, and particularly relates to a clamping attitude adjusting system and method for a linear displacement sensor for calibration.
Background
A Linear displacement sensor (Linear displacement sensor) is a device that senses changes in length dimension and converts the changes to a usable output signal. The linear displacement sensor can be used for measuring length dimensions such as displacement, distance, position and strain quantity, and is a sensor widely applied in engineering test. The linear displacement sensor has various output signal types and can be divided into an inductive displacement sensor, a strain displacement sensor, a laser displacement sensor, a pull-wire displacement sensor and the like according to the structure and the sensitivity principle of the linear displacement sensor.
In order to ensure that the output displacement length of the linear displacement sensor serving as a measuring instrument can be traced to the national standard, the legal metrological verification mechanism measures and calibrates the linear displacement sensor according to JJF1305-2011 'calibration standard of the linear displacement sensor', and the method comprises the following steps: the calibrated linear displacement sensor is arranged on a fixed position of the sensor detection table, and displacement is applied to the calibrated linear displacement sensor through a moving end of the sensor detection table. The sensor detection platform in the method can be self-research special equipment, and can also utilize instruments such as a length measuring instrument or a length measuring machine to carry out measurement calibration on the linear displacement sensor.
In order to ensure the calibration precision of the linear displacement sensor, when the calibration is carried out by using the method, the installation of the sensor should meet the Abbe 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 universal sensor detection table so as to reduce the measurement error.
At present, for the clamping and the posture adjustment of a linear displacement sensor at the fixed end of a displacement detection table, visual assistance and manual adjustment are usually adopted, and for the linear displacement sensor with common precision, the Abbe error caused by tiny deviation which can not be observed by naked eyes is extremely small, so that the final calibration result can not be greatly influenced. However, in the case of a high-precision linear displacement sensor, since abbe errors due to slight deviations in the posture of the sensor are not negligible, there is a problem that the calibration efficiency is inevitably low because adjustment is more required when adjusting the high-precision linear displacement sensor.
Disclosure of Invention
In view of the above, the present invention provides a clamping attitude adjusting system and an adjusting 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 clamping attitude adjustment system of a linear displacement sensor for calibration comprises:
the height, the inclination angle, the circumferential rotation angle and the position on the two-dimensional plane of the clamping platform are adjustable;
the first clamping assembly is used for clamping a linear displacement sensor to be calibrated, is positioned on the upper side of the clamping platform and is detachably connected with the clamping platform;
the second clamping component is arranged on one side of the first clamping component;
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 following steps:
the laser device is located on the first clamping assembly and detachably connected with the first clamping assembly, and the laser device 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, examine test table and include the pedestal, one side of pedestal is fixed with first installation piece, the cell body has been seted up to the pedestal upper surface, the cell body is seted up along the length direction of pedestal, the symmetry is provided with two supports in the cell body, and two supports are put on the shelf and are equipped with the lead screw, the motor is connected to the one end of lead screw, the motor with the controller electricity is connected, the cover is equipped with nut seat on the lead screw, fixed second installation piece on the nut seat, the second installation piece pass through the direction subassembly with pedestal upper surface connection, the clamping platform with first installation piece is detachable connects, the second clamping subassembly with the detachable connection of second installation piece.
Preferably, the guide assembly comprises two sliding grooves symmetrically formed in the upper surface of the seat body, the two sliding grooves are respectively located on two sides of the groove body, a sliding block is clamped in each of the two sliding grooves, and the sliding block is fixed to the second mounting block.
The adjusting method of the clamping posture adjusting system of the linear displacement sensor for calibration comprises the following steps:
s1, preparing a system and roughly adjusting the posture of the linear displacement sensor to be calibrated;
s2, starting a motor, enabling the second clamping assembly to drive the two-dimensional position sensor to move for a certain distance to reach a first position, clearing the displacement value of the detection table, and reading position data1 fed back by the two-dimensional position sensor; the motor is started again, so that the second clamping assembly drives the two-dimensional position sensor to move for a certain distance again and then reaches a second position, and the displacement value of the detection table and position data2 fed back by the two-dimensional position sensor are read; the controller receives and stores the data of the data1 and the data2, performs coordinate analysis on position points of the two-dimensional position sensor through the data of the data1 and the data2, calculates attitude pitch 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, and sends the executable motion control instruction to the clamping platform, and the clamping platform performs corresponding motion to finish fine adjustment of the attitude of the linear displacement sensor to be calibrated;
and S3, verifying the adjustment precision, if the adjustment precision is smaller than the upper adjustment precision threshold, finishing the adjustment, otherwise, returning to S2 to continue the adjustment until the requirement of the adjustment precision is met, and sending an audible and visual prompt by the controller to finish the posture adjustment of the linear displacement sensor to be calibrated.
Preferably, S1 includes the steps of:
s11, fixing the clamping platform on the first mounting block, fixing the linear displacement sensor to be calibrated on the clamping platform through the first clamping assembly, and keeping the displacement detection direction of the linear displacement sensor to be calibrated to be the same as the displacement output direction of the detection platform;
s12, fixing the second clamping assembly and the second mounting block, mounting the two-dimensional position sensor on the second clamping assembly, enabling the 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 central area of the detection plane of the two-dimensional position sensor in the vertical direction;
and 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 loosening the first clamping assembly to readjust the position of the linear displacement sensor to be calibrated and then compressing the linear displacement sensor to be calibrated again if large macroscopic deviation exists.
Preferably, S3 includes the steps of:
recording the position data of the two-dimensional position sensor at the moment as data3, starting a motor to enable the second clamping assembly to drive the two-dimensional position sensor to move reversely for a certain distance and then reach a third position, and reading the displacement value of the detection platform and the position data4 fed back by the two-dimensional position sensor; the controller receives and stores the data3 and data4, performs coordinate analysis on the position point of the two-dimensional position sensor through the data3 and data4, and completes the adjustment if the unidirectional coordinate difference between dat3a and data4 is smaller than a given upper threshold value of the adjustment accuracy.
Preferably, when the linear displacement sensor to be calibrated is a laser type sensor, if the power of the output laser is matched with that of the two-dimensional position sensor, in S13, the output laser of the linear displacement sensor to be calibrated is adjusted to be located in a central area of a 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 does not match the two-dimensional position sensor, S13 is replaced with the following step:
placing a laser on the first clamping assembly, and electrically connecting the laser with a controller; and adjusting the position of the laser to enable the emitting direction of emergent light of the laser to be parallel to the displacement detection direction of the linear displacement sensor to be calibrated, and adjusting the height of the clamping platform to enable output laser of the laser to be 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 includes the following steps:
drawing out a stay wire of the linear displacement sensor to be calibrated, and fixing the end part of the stay wire to the second clamping assembly, so that the length direction of the stay 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 a controller;
and adjusting the position of the laser to enable the emitting direction of emergent light of the laser to be parallel to the displacement detection direction of the linear displacement sensor to be calibrated, and adjusting the height of the clamping platform to enable output laser of the laser to be positioned in the central area of the detection plane of the two-dimensional position sensor in the vertical direction.
The clamping attitude adjusting system and the clamping attitude adjusting method for the linear displacement sensor for calibration are suitable for the current mainstream pull-wire type and laser type high-precision linear displacement sensors, can be compatible with self-grinding special equipment used for calibration and general instruments such as a length measuring instrument or a length measuring machine, solve the problem of difficult attitude adjustment in the calibration of the high-precision linear displacement sensor, can realize accurate, rapid and automatic adjustment of the attitude of the calibrated linear sensor, break through the current situation of visual assistance and manual adjustment of the attitude of the sensor at the current stage, can remarkably reduce the influence of measurement errors caused by tiny deviation of the clamping attitude of the sensor on the calibration accuracy, remarkably improve the calibration accuracy and the calibration efficiency of the linear displacement sensor, reduce the dependence degree on the experience of operators, have strong practicability and are worthy of popularization.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a state diagram of use of the present invention in calibrating a pull wire type linear displacement sensor;
fig. 3 is an explanatory diagram of the definition of the coordinate system of the clamping platform 4 of the system for adjusting the clamping attitude of the linear displacement sensor for calibration according to the present invention;
FIG. 4 is a schematic diagram illustrating a posture adjustment principle provided in an embodiment of the present invention;
fig. 5 is a state diagram for use in calibrating a laser-based linear displacement sensor according to the present invention.
Description of reference numerals:
the device comprises a laser 1, a first clamping component 2, a linear displacement sensor to be calibrated 3, a clamping platform 4, a first mounting block 5, a detection table 6, a second mounting block 7, a second clamping component 8, a two-dimensional position sensor 9 and a controller 10.
Detailed Description
The invention provides a clamping attitude adjusting system and method of a linear displacement sensor for calibration, which are described below with reference to the structural schematic diagrams of fig. 1 to 5.
A clamping posture adjusting system of a linear displacement sensor for calibration is shown in figures 1, 2, 3 and 5 and 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; the upside of clamping platform 4 is equipped with first clamping subassembly 2, and first clamping subassembly 2 is used for the clamping to treat calibrated linear displacement sensor 3, treats that calibrated linear displacement sensor 3 is through the detachable connection of first clamping subassembly 2 on clamping platform 4.
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 and the linear displacement sensor 3 to be calibrated are arranged oppositely, and the two-dimensional position sensor 9 and the clamping platform 4 are respectively and electrically connected with the controller 10.
Further, still include laser instrument 1 that is located first clamping subassembly 2, laser instrument 1 and first clamping subassembly 2 detachable connection, laser instrument 1 is connected with controller 10 electricity.
Further, still including examining test table 6, clamping platform 4, second clamping subassembly 8 set up respectively in examining test table 6's both sides.
Further, examine the specific pedestal that includes of structure of test table 6, one side of pedestal is fixed with first installation piece 5, the cell body has been seted up to the pedestal upper surface, the cell body is seted up along the length direction of pedestal, the symmetry is provided with two supports in the cell body, two supports are put on the shelf and are equipped with the lead screw, the motor is connected to the one end of lead screw, the motor is connected with 10 electricity of controller, the cover is equipped with nut seat on the lead screw, fixed second installation piece 7 is gone up to the nut seat, second installation piece 7 passes through direction subassembly and pedestal upper surface connection, clamping platform 4 is connected with first installation piece 5 is detachable, second clamping subassembly 8 is connected with second installation piece 7 is detachable.
Furthermore, 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 clamped in each sliding groove, and the sliding blocks are fixed with the second mounting 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 table 6 and is connected with the first installation block 5 through screws, and the second clamping component 8 is arranged on the other side of the detection table 6 and is connected with the second installation block 7 through screws. After the motor is started, the nut seat can be driven to move, so that the second mounting block 7 is driven to move on the detection table 6 synchronously.
As shown in fig. 1, a clamping posture adjusting 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 using methods will be given below for the two sensors respectively.
Example 1
Adopt stay-supported linear displacement sensor as being calibrated the sensor, as shown in fig. 1 to fig. 3, be fixed in first installation piece 5 with clamping platform 4, will treat the stay-supported linear displacement sensor of calibration and be fixed in clamping platform 4 through first clamping subassembly 2, keep the displacement detection direction of stay-supported linear displacement sensor the same with the displacement output direction who detects 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 loosening the first clamping assembly 2 to readjust the position of the linear displacement sensor 3 to be calibrated and then compressing the linear displacement sensor again if large macroscopic deviation exists.
The second clamping assembly 8 and the second mounting block 7 are fixed, 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 perpendicular to the displacement output direction of the detection table 6, in this embodiment, perpendicular to the Y direction, and the clamping platform 4 and the two-dimensional position sensor 9 are electrically connected with the controller 10 respectively.
As shown in fig. 2 and 3, the pulling wire of the pulling wire type linear displacement sensor to be calibrated is pulled out, and the end part of the pulling wire is fixed on the second clamping assembly 8, so that the length direction of the pulling wire is the same as the displacement output direction of the detection table 6; placing a laser 1 on a first clamping component 2, and electrically connecting the laser 1 with a controller 10; the position of the laser 1 is adjusted, the emission direction of 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 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 a first position P1, clearing the displacement value of the detection table 6, and reading position data1 fed back by the two-dimensional position sensor 9; the motor is started again, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move for a certain distance again and then reaches a second position P2, and the displacement value of the detection table 6 and the position data2 fed back by the two-dimensional position sensor 9 are read; the controller 10 receives and stores the data of the data1 and the data2, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data1 and the data2, calculates the attitude pitch deviation and the rotation deviation of the linear displacement sensor 3 to be calibrated, generates a deviation correction control algorithm according to the coordinate analysis result, converts the deviation correction control algorithm into an executable motion control instruction, and sends the executable motion control instruction to the clamping platform 4, and the clamping platform 4 performs corresponding pitch, lifting or rotation adjustment motion to complete the attitude fine adjustment of the linear displacement sensor 3 to be calibrated.
After the fine adjustment of the posture is completed, the adjustment precision verification is required:
recording the position data of the two-dimensional position sensor 9 at that time as data3, starting a motor, enabling the second clamping assembly 8 to drive the two-dimensional position sensor 9 to move reversely for a certain distance and then reach a third position, and reading the displacement value of the detection platform 6 and position data4 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores the data3 and data4, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data3 and data4, completes the adjustment if the unidirectional coordinate difference between the data3 and the data4 is smaller than a given upper threshold value of the adjustment accuracy, otherwise, returns to the adjustment step until the requirement of the adjustment accuracy is met, and the controller 10 sends out an audible and visual prompt.
Example 2
When the power of the output laser of the laser type linear displacement sensor to be calibrated is matched with the two-dimensional position sensor 9, as shown in fig. 5, 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 emitting direction of the laser type linear displacement sensor is kept to be the same as the displacement output direction of the detection table 6.
The second clamping assembly 8 and the second mounting block 7 are fixed, 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 perpendicular to the displacement output direction of the detection table 6, in this embodiment, perpendicular to the Y direction, and the clamping platform 4 and the two-dimensional position sensor 9 are electrically connected with the controller 10 respectively.
As shown in fig. 5, the output laser light of the laser type 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 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, if large macroscopic deviation exists, loosening the first clamping component 2, readjusting the position of the laser type linear displacement sensor to be calibrated, and then compressing again.
As shown in fig. 4, the motor is started, so that after the second clamping assembly 8 drives the two-dimensional position sensor 9 to move for 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 is read; the motor is started again, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move for a certain distance again and then reaches a second position P2, and the displacement value of the detection table 6 and the position data2 fed back by the two-dimensional position sensor 9 are read; the controller 10 receives and stores the data of the data1 and the data2, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data1 and the data2, calculates the attitude pitch deviation and the rotation deviation of the laser linear displacement sensor to be calibrated, generates a deviation correction control algorithm according to the coordinate analysis result, converts the deviation correction control algorithm into an executable motion control instruction, and sends the executable motion control instruction to the clamping platform 4, and the clamping platform 4 performs corresponding pitch, lifting or rotation adjustment motion to complete the attitude fine adjustment of the laser linear displacement sensor to be calibrated.
After the fine adjustment of the posture is completed, the adjustment precision verification is required:
recording the position data of the two-dimensional position sensor 9 at that time as data3, starting a motor, enabling the second clamping assembly 8 to drive the two-dimensional position sensor 9 to move reversely for a certain distance and then reach a third position, and reading the displacement value of the detection platform 6 and position data4 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores the data3 and data4, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data3 and data4, completes the adjustment if the unidirectional coordinate difference between the data3 and the data4 is smaller than a given upper threshold value of the adjustment accuracy, otherwise, returns to the adjustment step until the requirement of the adjustment accuracy is met, and the controller 10 sends out an audible and visual prompt.
Example 3
Adopting a laser type linear displacement sensor as a calibrated sensor, as shown in fig. 5, when the power of the output laser of the laser type linear displacement sensor to be calibrated is not matched with the two-dimensional position sensor 9, adopting the following steps:
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 emitting direction of the laser type linear displacement sensor is kept to be the same as the displacement output direction of the detection table 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, if large macroscopic deviation exists, loosening the first clamping component 2, readjusting the position of the laser type linear displacement sensor to be calibrated, and then compressing again.
The second clamping assembly 8 and the second mounting block 7 are fixed, 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 perpendicular to the displacement output direction of the detection table 6, in this embodiment, perpendicular to the Y direction, and the clamping platform 4 and the two-dimensional position sensor 9 are electrically connected with the controller 10 respectively.
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, the emission direction of emergent light of the laser 1 is parallel to the displacement detection direction of the laser type linear displacement sensor to be calibrated, the height of the clamping platform 4 is adjusted, and 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.
As shown in fig. 4, the motor is started, so that after the second clamping assembly 8 drives the two-dimensional position sensor 9 to move for 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 is read; the motor is started again, so that the second clamping assembly 8 drives the two-dimensional position sensor 9 to move for a certain distance again and then reaches a second position P2, and the displacement value of the detection table 6 and the position data2 fed back by the two-dimensional position sensor 9 are read; the controller 10 receives and stores the data of the data1 and the data2, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data1 and the data2, calculates the attitude pitch deviation and the rotation deviation of the laser linear displacement sensor to be calibrated, generates a deviation correction control algorithm according to the coordinate analysis result, converts the deviation correction control algorithm into an executable motion control instruction, and sends the executable motion control instruction to the clamping platform 4, and the clamping platform 4 performs corresponding pitch, lifting or rotation adjustment motion to complete the attitude fine adjustment of the laser linear displacement sensor to be calibrated.
After the fine adjustment of the posture is completed, the adjustment precision verification is required:
recording the position data of the two-dimensional position sensor 9 at that time as data3, starting a motor, enabling the second clamping assembly 8 to drive the two-dimensional position sensor 9 to move reversely for a certain distance and then reach a third position, and reading the displacement value of the detection platform 6 and position data4 fed back by the two-dimensional position sensor 9; the controller 10 receives and stores the data3 and data4, performs coordinate analysis on the position point of the two-dimensional position sensor 9 through the data3 and data4, completes the adjustment if the unidirectional coordinate difference between the data3 and the data4 is smaller than a given upper threshold value of the adjustment accuracy, otherwise, returns to the adjustment step until the requirement of the adjustment accuracy is met, and the controller 10 sends out an audible and visual prompt.
The clamping attitude adjusting system and the adjusting method for the linear displacement sensor for calibration solve the problem of difficult attitude adjustment in the calibration of the high-precision linear displacement sensor, can realize accurate, rapid and automatic adjustment of the attitude of the calibrated linear sensor, are suitable for the current mainstream pull-wire type and laser type high-precision linear displacement sensors, can be compatible with self-research special equipment and general instruments such as a length measuring instrument or a length measuring machine and the like used for calibration, break through the current situation of visual assistance and manual adjustment of the attitude of the sensor at the current stage, can remarkably reduce the influence of measurement errors caused by tiny deviation of the clamping attitude of the sensor on the calibration accuracy, remarkably improve the calibration accuracy and the calibration efficiency of the linear displacement sensor, reduce the dependence degree on the experience of operators, have strong practicability and are worthy of popularization.
The above disclosure is only for the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. The utility model provides a linear displacement sensor clamping attitude adjustment system for calibration which characterized in that includes:
the height, the inclination angle, the circumferential rotation angle and the position on the two-dimensional plane of the clamping platform (4) are adjustable;
the first clamping assembly (2) is used for clamping a 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 is detachably connected with the clamping platform (4);
the second clamping component (8) is arranged on one side of the first clamping component (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;
and the controller (10) is electrically connected with the clamping platform (4) and the two-dimensional position sensor (9) respectively.
2. The system for adjusting the clamping posture of the linear displacement sensor for calibration according to claim 1, further comprising:
the laser device (1) is located on the first clamping assembly (2) and detachably connected with the first clamping assembly (2), and the laser device (1) is electrically connected with the controller (10).
3. The clamping posture adjusting system for the linear displacement sensor for calibration as claimed in claim 2, 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).
4. The clamping attitude adjustment system for the linear displacement sensor for calibration according to claim 3, it is characterized in that the detection table (6) comprises a base body, one side of the base body is fixed with a first installation block (5), the upper surface of the seat body is provided with a groove body, the groove body is arranged along the length direction of the seat body, two brackets are symmetrically arranged in the groove body, a screw rod is erected on the two brackets, one end of the screw rod is connected with a motor which is electrically connected with the controller (10), a nut seat is sleeved on the screw rod, a second mounting block (7) is fixed on the nut seat, the second mounting block (7) is connected with the upper surface of the seat body through a guide component, the clamping platform (4) is detachably connected with the first mounting block (5), the second clamping assembly (8) is detachably connected with the second mounting block (7).
5. The system for adjusting the clamping posture of the linear displacement sensor for calibration as recited in claim 4, wherein 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 clamped in each of the two sliding grooves, and the sliding block is fixed to the second mounting block (7).
6. The adjusting method for the clamping attitude adjusting system of the linear displacement sensor for calibration according to claim 4, characterized by comprising the following steps:
s1, preparing a system and roughly adjusting the posture of the 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 the first position, clearing the displacement value of the detection table (6), and reading position data1 fed back by the two-dimensional position sensor (9); the motor is started again, so that the second clamping assembly (8) drives the two-dimensional position sensor (9) to move for a certain distance again and then reaches a second position, and the displacement value of the detection table (6) and position data2 fed back by the two-dimensional position sensor (9) are read; the controller (10) receives and stores the data of the data1 and the data2, performs coordinate analysis on the position point of the two-dimensional position sensor (9) through the data of the data1 and the data2, calculates attitude pitch deviation and rotation deviation of the linear displacement sensor (3) to be calibrated, generates a deviation correction control algorithm according to the 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 fine adjustment of the attitude of the linear displacement sensor (3) to be calibrated;
and S3, verifying the adjustment precision, if the adjustment precision is smaller than the upper adjustment precision threshold, finishing the adjustment, otherwise, returning to S2 to continue the adjustment until the requirement of the adjustment precision is met, and enabling the controller (10) to give out an acousto-optic prompt to finish the posture adjustment of the linear displacement sensor (3) to be calibrated.
7. The method for adjusting the clamping posture adjusting system of the linear displacement sensor for calibration according to claim 6, wherein S1 comprises the following steps:
s11, fixing the clamping platform (4) on the first mounting block (5), fixing the linear displacement sensor (3) to be calibrated on the clamping platform (4) through the first clamping assembly (2), and keeping the displacement detection direction of the linear displacement sensor the same as the displacement output direction of the detection table (6);
s12, fixing the second clamping assembly (8) and the second mounting block (7), mounting the 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 the 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 central 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 loosening the first clamping assembly (2) to readjust the position of the linear displacement sensor (3) to be calibrated and then compressing the linear displacement sensor again if large macroscopic deviation exists.
8. The method for adjusting the clamping posture adjusting system of the linear displacement sensor for calibration according to claim 6, wherein S3 comprises the following steps:
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 move reversely for a certain distance and then 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 data3 and data4, performs coordinate analysis on the position point of the two-dimensional position sensor (9) through the data3 and data4, and completes adjustment if the unidirectional coordinate difference between the data3 and the data4 is smaller than a given upper threshold value of adjustment accuracy.
9. The adjusting method of the clamping posture adjusting system of the linear displacement sensor for calibration according to claim 7, wherein when the linear displacement sensor (3) to be calibrated is a laser type sensor, if the power of the output laser light matches with the two-dimensional position sensor (9), in S13, the output laser light 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; replacing S13 with the following steps when the power of the output laser of the linear displacement sensor (3) to be calibrated does not match the two-dimensional position sensor (9):
the laser (1) is placed on the first clamping component (2), and the laser (1) is electrically connected with the controller (10); and adjusting the position of the laser (1), enabling the emission direction of emergent light of the laser (1) to be parallel to the displacement detection direction of the linear displacement sensor (3) to be calibrated, and adjusting the height of the clamping platform (4) to enable output laser of the laser (1) to be positioned in the central area of the detection plane of the two-dimensional position sensor (9) in the vertical direction.
10. The adjusting method of the clamping posture adjusting system of the linear displacement sensor for calibration according to claim 7, wherein when the linear displacement sensor (3) to be calibrated is a pull-wire displacement sensor, the step S13 further comprises the following steps:
drawing out a pull wire of the 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 the detection table (6);
the laser (1) is placed on the first clamping component (2), and the laser (1) is electrically connected with the controller (10);
and adjusting the position of the laser (1), enabling the emission direction of emergent light of the laser (1) to be parallel to the displacement detection direction of the linear displacement sensor (3) to be calibrated, and adjusting the height of the clamping platform (4) to enable output laser of the laser (1) to be positioned in the central area of the detection plane of the two-dimensional position sensor (9) in the vertical direction.
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| CN116718355A (en) * | 2023-08-08 | 2023-09-08 | 陕西省计量科学研究院 | Retroreflection sample grade and pose adjusting device and method |
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