Speed displacement metering and calibrating device

Abstract

The invention discloses a speed displacement measurement calibration device. A chassis is arranged on a gear rack, a driving device, a control device and a roller support are arranged on the chassis, a roller is arranged on the roller support, a bayonet is formed in the outer side of the roller, the axis direction of the roller is the same as the movement direction of the gear rack, and the bayonet is used for being connected with a steel wire rope of a speed displacement sensor; the driving device comprises a motor and a speed reducer, the motor is connected with an output shaft of the roller, and the speed reducer is connected with the gear rack and used for driving the gear rack; the control device comprises a motor driver and a motion control card. According to the invention, the problem of unqualified precision caused by mismatching of the measurement precision and self-calibration of the speed displacement sensor in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of metrology and calibration, and in particular to a velocity displacement metrology and calibration device. Background Art

[0002] Speed ​​sensor is a component that converts the change of non-electrical quantity (such as speed) into the change of electrical quantity. It is a part and accessory of measuring and controlling instruments and equipment. It is widely used in various occasions where the speed of an object needs to be measured, such as industrial automation, automobile inspection, wind power generation and other fields.

[0003] Velocity displacement sensors are widely used in the detection field, so the accuracy verification of velocity displacement sensors becomes a crucial issue.

[0004] In the related art, the technical problem that the measurement accuracy of the velocity displacement sensor does not match its own calibration, resulting in unqualified accuracy, has not yet been effectively solved. Summary of the invention

[0005] The purpose of the present invention is to provide a velocity displacement measurement calibration device to solve the problem in the related art that the measurement accuracy of the velocity displacement sensor does not match its own calibration, resulting in unqualified accuracy.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a speed displacement measurement and calibration device, comprising a chassis arranged on a gear rack, a driving device, a control device and a roller bracket arranged on the chassis, a roller arranged on the roller bracket, and a bayonet arranged on the outer side of the roller, wherein the axial direction of the roller is the same as the movement direction of the gear rack, and the bayonet is used to connect the wire rope of the speed displacement sensor; the driving device comprises a motor and a reducer, the motor is connected to the output shaft of the roller, the reducer is connected to the gear rack, and the reducer is used to drive the gear rack; the control device comprises a motor driver and a motion control card.

[0007] It is further configured as follows: a motor driver and a motion control card are fixedly connected to the chassis, wherein the motor driver and the motion control card are located below the roller.

[0008] It is further configured as follows: the motor is connected to the output shaft of the drum through a pulley and a belt; after the belt is twisted, it is connected to the output shaft of the motor through a supporting rotating shaft; and the output shaft of the motor is connected to the reducer.

[0009] It is further configured as follows: the motor connection is connected to the motor driver through a signal interface and a power interface; and the motion control card is connected to a host computer.

[0010] A speed displacement measurement and calibration method comprises: after resetting a speed displacement sensor and a speed displacement measurement and calibration device to zero, connecting the speed displacement sensor to the speed displacement measurement and calibration device; uniformly selecting 5 displacement measurement points and 5 speed measurement points within the measuring range of the speed displacement sensor, uniformly moving at a speed value set at each speed measurement point, repeating the measurement 3 times at each displacement measurement point, and obtaining a test result, wherein the measurement result comprises a displacement measurement value and a speed measurement value; and calculating an error value of the speed displacement sensor according to the test result, wherein the error value comprises a displacement indication error, a displacement return error and a speed indication error.

[0011] Furthermore, after resetting the speed displacement sensor and the speed displacement measurement and calibration device to zero, the speed displacement sensor is connected to the speed displacement measurement and calibration device, including: connecting the steel wire rope of the speed displacement sensor to the bayonet of the drum.

[0012] Furthermore, 5 displacement measurement points and 5 speed measurement points are evenly selected within the measuring range of the speed displacement sensor, and the sensor moves at a uniform speed at the speed value set at each speed measurement point. The measurement is repeated 3 times at each displacement measurement point to obtain test results, including: setting speed and displacement parameters on the host computer interface of the speed displacement measurement and calibration device; starting the speed displacement measurement and calibration device, and the roller drives the steel wire rope of the speed displacement sensor to perform forward and reverse uniform motion; at each displacement measurement point, the displacement standard value and speed standard value displayed by the speed displacement measurement and calibration device are read, and the measurement results of the speed displacement sensor are recorded.

[0013] Further, the error value of the speed displacement sensor is calculated according to the test results. The error value includes the displacement indication error, the displacement return error and the speed indication error. The calculation formula is: ,in, For the velocity displacement sensor Measuring point Secondary displacement indication error, For the velocity displacement sensor Measuring point The displacement measurement value, For the velocity displacement measurement calibration device Measuring point The displacement measurement value, is the full-scale displacement value of the velocity displacement sensor, , .

[0014] Further, the error value of the velocity displacement sensor is calculated according to the test results. The error value includes the displacement indication error, the displacement return error and the velocity indication error. The calculation formula is: in, For the velocity displacement sensor The displacement return error of each displacement measurement point is The speed displacement sensor is in the positive travel direction. The arithmetic mean value of three measurements at each displacement measurement point is: The speed displacement sensor is in the reverse stroke direction. The arithmetic mean value of three measurements at each displacement measurement point is: is the full-scale displacement value of the velocity displacement sensor, , .

[0015] Further, the error value of the speed displacement sensor is calculated according to the test results. The error value includes the displacement indication error, the displacement return error and the speed indication error, including: calculating the speed indication error, the calculation formula is: ,in, For the velocity displacement sensor The indication error of the jth speed measurement at the measuring point is: For the velocity displacement sensor The jth speed measurement value of the measurement point, For the velocity displacement measurement calibration device The jth speed measurement value of the measurement point, , .

[0016] Compared with the prior art, the beneficial technical effects of the present invention are:

[0017] The present invention realizes accurate calibration of the length or displacement of the sensor wire rope through integrated design, and its technical effect is significant and multi-dimensional. First, the device uses a single motor to drive the rotation of the roller and the linear motion of the gear rack at the same time through a clever mechanical connection between the pulley and the belt. This linkage mechanism not only simplifies the structure, but also improves energy efficiency.

[0018] Secondly, through the cooperation between the host computer and the motion control card, precise control of the motor movement is achieved. The operator can easily send instructions to adjust the operating status of the motor, thereby accurately controlling the winding speed and displacement of the wire rope. This highly automated control method greatly improves the efficiency and accuracy of the calibration process.

[0019] Furthermore, the synchronous motion design of the drum and the gear rack ensures that the wire rope will not overlap during the winding process, and the gear rack moves accurately by a wire rope diameter for each winding. This design not only avoids damage to the wire rope and error accumulation, but also ensures the reliability and repeatability of the calibration results.

[0020] Finally, the overall structure of the device is compact and stable, and the components work well together, ensuring long-term stability and reliability. At the same time, real-time data feedback and monitoring functions enable operators to keep track of calibration progress and equipment status at any time, providing convenience for timely maintenance and adjustments.

[0021] In summary, a velocity displacement metrology and calibration device has demonstrated remarkable technical effects in improving calibration accuracy, automation level, operation stability and maintenance convenience, providing strong support for measurement and calibration work in related fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of a velocity displacement measurement and calibration device;

[0024] Figure 2 It is a front view of a velocity displacement measurement and calibration device;

[0025] Figure 3 It is a left view of a velocity displacement measurement and calibration device;

[0026] Figure 4 It is a top view of a velocity displacement measurement and calibration device;

[0027] Figure 5 is a flow chart of a velocity displacement measurement calibration method;

[0028] Fig. 6A is the displacement indication error when the speed is 0.1m / s;

[0029] Figure 6B is the displacement indication error when the speed is 0.2m / s;

[0030] Figure 6C is the displacement indication error when the speed is 0.3m / s;

[0031] Fig.6D is the displacement indication error when the speed is 0.4m / s;

[0032] Fig. 6E is the displacement indication error when the speed is 0.5m / s;

[0033] Fig. 7Ais the speed indication error when the displacement is 2.0m;

[0034] Figure 7B is the speed indication error when the displacement is 4.0m;

[0035] Figure 7C is the speed indication error when the displacement is 6.0m;

[0036] Fig.7D is the speed indication error when the displacement is 8.0m;

[0037] Fig. 7E It is the speed indication error when the displacement is 10.0m.

[0038] Figure numerals: 1. roller; 2. motor driver; 3. motion control card; 4. belt; 5. pulley; 6. motor; 7. reducer; 8. rack and pinion; 91. signal interface; 92. power interface; 10. speed displacement sensor; 11. wire rope. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example

[0043] Reference Figure 1-4, which is a speed displacement measurement and calibration device disclosed in the present invention, and the invention comprises: a chassis is arranged on the gear rack 8, a driving device, a control device and a roller bracket are arranged on the chassis, a roller 1 is arranged on the roller bracket, and a bayonet is arranged on the outer side of the roller 1, wherein the axial direction of the roller 1 is the same as the movement direction of the gear rack 8, and the bayonet is used to connect the wire rope 11 of the speed displacement sensor 10; the driving device comprises a motor 6 and a reducer 7, the motor 6 is connected to the output shaft of the roller 1, the reducer 7 is connected to the gear rack 8, and the reducer 7 is used to drive the gear rack 8; the control device comprises a motor driver 2 and a motion control card 3.

[0044] The chassis is fixedly connected with a motor driver 2 and a motion control card 3, wherein the motor driver 2 and the motion control card 3 are located below the drum 1. The motor 6 is connected to the output shaft of the drum 1 through the pulley 5 and the belt 4; the belt 4 is twisted and connected to the output shaft of the motor 6 through the supporting rotating shaft; the output shaft of the motor 6 is connected to the reducer 7. The present invention can also use two motors 6 to connect the drum 1 and the gear rack 8 respectively, which can achieve the same technical effect.

[0045] The speed displacement measurement and calibration device uses a motor 6 to realize the rotational motion of the roller and the linear motion control of the gear rack 8. The command is sent to the motion control card 3 through the upper computer interface, and the motion control card 3 controls the movement of the motor 6 through the motor driver 2. The output shaft of the motor 6 is connected to the reducer 7, and is connected to the output shaft of the roller through the pulley 5 and the belt 4, so that the gear rack 8 can move horizontally while the roller rotates.

[0046] The steel wire rope 11 of the speed displacement sensor 10 is installed on the drum 1. The motor 6 moves the steel wire rope 11 of the speed displacement sensor 10 to be measured, and the gear rack 8 below moves a distance of the diameter of the steel wire rope 11 after the steel wire rope 11 is wound one circle, ensuring that the steel wire rope 11 will not be wound around the previous circle of steel wire rope 11 when the next circle is wound. The drum 1 and the gear rack 8 mechanism move synchronously, and there is a certain ratio requirement on the movement speed of the two. The drum 1 only rotates, and the gear rack 8 mechanism drives the drum 1 to move to the left or right as a whole, so the steel wire rope 11 is wound around the drum 1 during the movement, and no overlap occurs.

[0047] The motor is connected to the motor driver through a signal interface and a power interface; the motion control card is connected to the host computer.

[0048] Specifically, the signal interface 91 and the power interface 92 are both connected to the motor driver 2, the motor driver 2 is connected to the motion control card 3, the motion control card 3 is connected to the host computer, the state of the transmission system is sent to the host computer through the motion control card 3, and the motor movement can also be controlled by the host computer, which allows the operator to timely understand the operating state of the transmission system and to warn and diagnose possible faults. Through the remote monitoring function of the host computer, the operator can monitor and manage the transmission system at any place and at any time, greatly improving production efficiency and safety. The host computer can automatically adjust the operating state of the motor 6 according to a preset program or algorithm to achieve automatic control of the transmission system. The need for manual intervention is reduced and the risk of human error is reduced.

[0049] Reference Figure 5 , is a velocity displacement measurement calibration method disclosed in the present invention, comprising:

[0050] Step S101, after resetting the speed displacement sensor 10 and the speed displacement measurement and calibration device to zero, the speed displacement sensor 10 is connected to the speed displacement measurement and calibration device;

[0051] Specifically, after resetting to zero, the speed displacement sensor 10, the drum 1 and the gear rack 8 are all in the initial position. The speed displacement sensor 10 is a pull-rope speed displacement sensor. During the calibration process, the pull-rope speed displacement sensor is fixed to the base and does not need to be moved. The position where the wire rope of the pull-rope speed displacement sensor is installed on the drum 1 is the initial position. When the upper computer sends an instruction to the motor 6, the motor 6 starts to drive the drum 1 to rotate through the belt and pulley to wind the wire rope 11 of the speed displacement sensor 10 on the drum 1, and the motor 6 also drives the gear rack 8 to perform translational movement, so that the wire rope 11 can be evenly wound on the drum 1, so that the wire rope 11 will not overlap.

[0052] Step S102, evenly selecting 5 displacement measurement points and 5 velocity measurement points within the measuring range of the velocity displacement sensor 10, moving at a uniform speed at a speed value set at each velocity measurement point, repeating the measurement 3 times at each displacement measurement point, and obtaining a test result, wherein the measurement result includes a displacement measurement value and a velocity measurement value;

[0053] Specifically, multiple displacement measurement points and speed measurement points are selected to make the test results diverse and more stable. Five measurement points are evenly selected according to the displacement measurement range and speed measurement range of the tested speed displacement sensor 10. For example, if the displacement measurement range of the speed displacement sensor is 0-10m and the speed range is 0-5m / s, then five points of 2m, 4m, 6m, 8m, and 10m are selected as displacement measurement points, and five speed measurement points of 1m / s, 2m / s, 3m / s, 4m / s, and 5m / s are selected. A high-precision rotary encoder is used to collect the number of turns and angles of the speed displacement sensor wire rope 11, and the displacement of the measurement point is converted. When collecting the displacement, the corresponding time of each displacement measurement point is recorded. The ratio of the displacement difference between the two displacement measurement points to the difference at the corresponding time is the speed of the measurement point.

[0054] Step S103, calculating the error value of the speed displacement sensor 10 according to the test result, the error value includes a displacement indication error, a displacement return error and a speed indication error.

[0055] Optionally, after resetting the speed displacement sensor 10 and the speed displacement measurement and calibration device to zero, the speed displacement sensor 10 is connected to the speed displacement measurement and calibration device, including: connecting the steel wire rope 11 of the speed displacement sensor 10 to the bayonet of the drum 1 .

[0056] Optionally, 5 displacement measurement points and 5 speed measurement points are evenly selected within the measuring range of the speed displacement sensor 10, and the sensor moves at a uniform speed at the speed value set at each speed measurement point. The measurement is repeated 3 times at each displacement measurement point to obtain test results, including: setting speed and displacement parameters on the upper computer interface of the speed displacement measurement and calibration device; starting the speed displacement measurement and calibration device, and the drum 1 drives the steel wire rope 11 of the speed displacement sensor 10 to perform forward and reverse uniform motion; at each displacement measurement point, the displacement standard value and speed standard value displayed by the speed displacement measurement and calibration device are read, and the measurement results of the speed displacement sensor 10 are recorded.

[0057] Optionally, the error value of the velocity displacement sensor 10 is calculated according to the test results, and the error value includes the displacement indication error, the displacement return error and the velocity indication error, including: calculating the displacement indication error, the calculation formula is ,in, The velocity displacement sensor 10 is Measuring point Secondary displacement indication error, The velocity displacement sensor 10 is Measuring point The displacement measurement value, For the velocity displacement measurement calibration device Measuring point The displacement measurement value, is the full-scale displacement value of the velocity displacement sensor 10, , , , , The unit is millimeters.

[0058] Optionally, the error value of the velocity displacement sensor 10 is calculated according to the test results, and the error value includes the displacement indication error, the displacement return error and the velocity indication error, including: calculating the displacement return error, the calculation formula is in, The velocity displacement sensor 10 is The displacement return error of each displacement measurement point is The speed displacement sensor 10 is in the positive travel direction. The arithmetic mean value of three measurements at each displacement measurement point is: The speed displacement sensor 10 is in the reverse stroke direction. The arithmetic mean value of three measurements at each displacement measurement point is: is the full-scale displacement value of the velocity displacement sensor 10, , , as well as The unit is millimeters.

[0059] Optionally, the error value of the speed displacement sensor 10 is calculated according to the test results, and the error value includes the displacement indication error, the displacement return error and the speed indication error, including: calculating the speed indication error, the calculation formula is ,in, The velocity displacement sensor 10 is The indication error of the jth speed measurement at the measuring point is: The velocity displacement sensor 10 is The jth speed measurement value of the measurement point, For the velocity displacement measurement calibration device The jth speed measurement value of the measurement point, , , , , The unit is millimeters per second.

[0060] Reference Figure 6A-6E According to a velocity displacement measurement calibration method, the velocity displacement sensor 10 is tested at different speeds, and a curve diagram of displacement indication error is obtained, wherein: Fig. 6A is the displacement indication error when the speed is 0.1m / s, Figure 6B is the displacement indication error when the speed is 0.2m / s, Figure 6C is the displacement indication error when the speed is 0.3m / s, Fig.6D is the displacement indication error when the speed is 0.4m / s, Fig. 6E It is the displacement indication error when the speed is 0.5m / s.

[0061] Reference Figure 7A-7E According to a velocity displacement measurement calibration method, the velocity displacement sensor 10 under different displacements is tested to obtain a velocity indication error curve diagram, wherein, Fig. 7A is the velocity indication error when the displacement is 2.0m, Figure 7B is the velocity indication error when the displacement is 4.0m, Figure 7C is the speed indication error when the displacement is 6.0m, Fig.7D is the speed indication error when the displacement is 8.0m, Fig. 7E It is the speed indication error when the displacement is 10.0m.

[0062] The working principle and beneficial effects of the present invention are:

[0063] When the host computer sends a command to the motor 6, the motor 6 starts to drive the drum 1 to rotate and wind the wire rope 11 of the speed displacement sensor 10 on the drum 1, and the motor 6 also drives the gear rack 8 to perform translational movement, so that the wire rope 11 can be evenly wound on the drum 1.

[0064] The present invention realizes accurate calibration of the length or displacement of the sensor wire rope 11 through integrated design, and its technical effect is significant and multi-dimensional. First, the device uses a single motor 6 to drive the rotation of the roller and the linear motion of the gear rack 8 simultaneously through a clever mechanical connection between the pulley 5 and the belt 4. This linkage mechanism not only simplifies the structure, but also improves energy efficiency.

[0065] Secondly, through the cooperation between the host computer and the motion control card 3, the precise control of the movement of the motor 6 is achieved. The operator can easily send instructions to adjust the operating state of the motor 6, thereby accurately controlling the winding speed and displacement of the wire rope 11. This highly automated control method greatly improves the efficiency and accuracy of the calibration process.

[0066] Furthermore, the synchronous motion design of the drum 1 and the gear rack 8 ensures that the wire rope 11 will not overlap during the winding process, and each time it is wound, the gear rack 8 moves accurately by a diameter of the wire rope 11. This design not only avoids damage to the wire rope 11 and error accumulation, but also ensures the reliability and repeatability of the calibration results.

[0067] Finally, the overall structure of the device is compact and stable, and the components work well together, ensuring long-term stability and reliability. At the same time, real-time data feedback and monitoring functions enable operators to keep track of calibration progress and equipment status at any time, providing convenience for timely maintenance and adjustments.

[0068] In summary, a velocity displacement metrology and calibration device has demonstrated remarkable technical effects in improving calibration accuracy, automation level, operation stability and maintenance convenience, providing strong support for measurement and calibration work in related fields.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A velocity displacement measurement and calibration device, characterized in that: include: A chassis is arranged on the gear rack (8), a driving device, a control device and a roller bracket are arranged on the chassis, a roller (1) is arranged on the roller bracket, and a bayonet is arranged on the outer side of the roller (1), wherein the axial direction of the roller (1) is the same as the movement direction of the gear rack (8), and the bayonet is used to connect a steel wire rope (11) of a speed displacement sensor (10); The driving device comprises a motor (6) and a reducer (7), wherein the motor (6) is connected to the output shaft of the drum (1), and the reducer (7) is connected to the gear rack (8), and the reducer (7) is used to drive the gear rack (8); The control device comprises a motor driver (2) and a motion control card (3).

2. A velocity displacement measurement and calibration device according to claim 1, characterized in that: include: A motor driver (2) and a motion control card (3) are fixedly connected to the chassis, wherein the motor driver (2) and the motion control card (3) are located below the roller (1).

3. A velocity displacement measurement and calibration device according to claim 1, characterized in that: include: The motor (6) is connected to the output shaft of the drum (1) via a pulley (5) and a belt (4); After the belt (4) is twisted, it is connected to the output shaft of the motor (6) via the supporting rotating shaft; The output shaft of the motor (6) is connected to the reducer (7).

4. A velocity displacement measurement and calibration device according to claim 1, characterized in that: include: The motor (6) is connected to the motor driver (2) via a signal interface (91) and a power interface (92); The motion control card is connected to a host computer.

5. A velocity displacement measurement and calibration method, applied to a velocity displacement measurement and calibration device as claimed in any one of claims 1 to 4, characterized in that: include: After resetting the speed displacement sensor (10) and the speed displacement measurement and calibration device to zero, the speed displacement sensor (10) is connected to the speed displacement measurement and calibration device; Evenly selecting 5 displacement measurement points and 5 velocity measurement points within the measuring range of the velocity displacement sensor (10), moving at a uniform speed at a speed value set at each velocity measurement point, and repeating the measurement 3 times at each displacement measurement point to obtain a test result, wherein the measurement result includes a displacement measurement value and a velocity measurement value; An error value of the speed displacement sensor (10) is calculated according to the test result, the error value comprising a displacement indication error, a displacement return error and a speed indication error.

6. A velocity displacement measurement calibration method according to claim 5, characterized in that: After resetting the velocity displacement sensor (10) and the velocity displacement measurement and calibration device to zero, connecting the velocity displacement sensor (10) to the velocity displacement measurement and calibration device comprises: The steel wire rope (11) of the speed displacement sensor (10) is connected to the bayonet of the drum (1).

7. A velocity displacement measurement calibration method according to claim 5, characterized in that: Five displacement measurement points and five velocity measurement points are uniformly selected within the measuring range of the velocity displacement sensor (10), and the sensor moves at a uniform speed at a speed value set at each velocity measurement point. The measurement is repeated three times at each displacement measurement point to obtain test results, including: Setting the speed and displacement parameters on the upper computer interface of the speed and displacement measurement and calibration device; The speed displacement measurement and calibration device is started, and the drum (1) drives the steel wire rope (11) of the speed displacement sensor (10) to perform forward uniform motion and reverse uniform motion; At each displacement measurement point, the displacement standard value and the velocity standard value displayed by the velocity displacement measurement calibration device are read, and the measurement result of the velocity displacement sensor (10) is recorded.

8. A velocity displacement measurement calibration method according to claim 5, characterized in that: Calculating an error value of the speed displacement sensor (10) based on the test result, the error value comprising a displacement indication error, a displacement return error and a speed indication error, including: Calculate the displacement indication error, the calculation formula is: ,in, The velocity displacement sensor (10) is Measuring point Secondary displacement indication error, The velocity displacement sensor (10) is Measuring point The displacement measurement value, For the velocity displacement measurement calibration device Measuring point The displacement measurement value, is the full-scale displacement value of the velocity displacement sensor (10), , .

9. A velocity displacement measurement calibration method according to claim 5, characterized in that: Calculating an error value of the speed displacement sensor (10) based on the test result, the error value comprising a displacement indication error, a displacement return error and a speed indication error, including: Calculate the displacement return error, the calculation formula is: in, The velocity displacement sensor (10) is The displacement return error of each displacement measurement point is The speed displacement sensor (10) is in the positive travel direction. The arithmetic mean value of three measurements at each displacement measurement point is: The speed displacement sensor (10) is in the reverse stroke direction. The arithmetic mean value of three measurements at each displacement measurement point is: is the full-scale displacement value of the velocity displacement sensor (10), , .

10. A velocity displacement measurement calibration method according to claim 5, characterized in that: Calculating an error value of the speed displacement sensor (10) based on the test result, the error value comprising a displacement indication error, a displacement return error and a speed indication error, including: Calculate the speed indication error, the calculation formula is: ,in, The velocity displacement sensor (10) is The indication error of the jth speed measurement at the measuring point is: The velocity displacement sensor (10) is The jth speed measurement value of the measurement point, For the velocity displacement measurement calibration device The jth speed measurement value of the measurement point, , .

Images