A guyed displacement sensor calibration apparatus and method

Abstract

The application discloses a stay wire type displacement sensor calibration device and a calibration method, and belongs to the technical field of calibration devices. The stay wire type displacement sensor comprises a sensor body and a stay wire end, and the calibration device comprises a base. The base is provided with a clamping device, a moving device and a clamping platform. The clamping device comprises an inclination table and the clamping platform arranged on the inclination table, and the clamping platform is used for fixing the sensor body. The moving device comprises a moving platform used for fixing the stay wire end. The inclination table can adjust the inclination angle and direction of the clamping platform, can adjust the direction of the stay wire pulled out from the stay wire type displacement sensor, can adjust the parallelism between the straight line formed between the sensor body and the stay wire end and the moving track of the moving platform, can effectively reduce Abbe error generated in the calibration process of the stay wire type displacement sensor, and can improve the calibration precision of the stay wire type displacement sensor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of calibration equipment, in particular to a pull-wire displacement sensor calibration equipment and a calibration method. BACKGROUND

[0002] The pull-wire displacement sensor is a kind of linear displacement sensor that realizes measurement by the distance of the sensing line pulled out by itself, and is widely used in equipment manufacturing, engineering construction and other fields, and has the characteristics of high precision, good stability and convenient use, but needs to be calibrated after a certain period of use.

[0003] In the prior art, the operator takes the gauge block as a standard device, and the pull-wire displacement sensor directly measures the standard gauge block. The nominal value of the gauge block is the input value of the pull-wire displacement sensor, and the difference between the measured value obtained and the nominal value of the gauge block is the absolute indication error of the measurement point. According to the error, the sensitivity or zero point of the pull-wire displacement sensor is adjusted to calibrate the pull-wire displacement sensor. When the calibration is implemented, it is difficult to ensure the parallelism between the sensing rope pulled out from the pull-wire displacement sensor and the center line of the gauge block, which may result in a large Abbe error, and the calibration effect of the pull-wire displacement sensor is not ideal. SUMMARY

[0004] The present application aims to provide a pull-wire displacement sensor calibration equipment, which solves the problem of Abbe error in the prior art and the problem of unsatisfactory calibration effect.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] A pull-wire displacement sensor calibration equipment, the pull-wire displacement sensor comprising a sensor body and a pull-wire end, the calibration equipment comprising a base, the base being provided with:

[0007] A clamping device, the clamping device comprising an inclination table and a clamping platform provided on the inclination table, the clamping platform being used to fix the sensor body;

[0008] A moving device, the moving device comprising a moving platform used to fix the pull-wire end;

[0009] A grating ruler assembly, comprising a measuring slide rail and a moving end slidingly connected to the measuring slide rail, the moving end being connected to the moving platform, and the moving track of the moving platform being parallel to the measuring slide rail;

[0010] A linear scale, the linear scale being parallel to the measuring slide rail.

[0011] As a preferred, the calibration equipment further comprises a vision device provided on the moving platform, the vision device being used to observe the linear scale.

[0012] As preferred, a guide device is further arranged on the base, the guide device comprising a guide rail and a guide slider slidingly connected to the guide rail, the guide rail being fixedly arranged on the base, and the moving platform being connected to the guide slider, and the wire mark and the pull wire between the pull wire end and the sensor body being parallel to the guide rail.

[0013] As preferred, two sets of the guide device are arranged, the two guide rails being parallel to each other, the moving platform being in a door shape, the two ends of the moving platform being connected to the guide sliders of the two sets of the guide device respectively, and the wire mark being arranged between the two guide rails.

[0014] As preferred, the base comprises a first plate, a second plate and two side plates arranged at intervals, the two side plates supporting and connecting the first plate and the second plate and forming a mounting space, the first plate and the second plate being arranged in parallel, the wire mark being arranged on the side of the first plate away from the second plate, and the guide device being arranged in the mounting space.

[0015] As preferred, a transmission device and a hand wheel are further arranged on the base, the input end of the transmission device being connected to the hand wheel, and the output end of the transmission device being connected to the moving platform, the hand wheel driving the moving platform to move through the transmission device.

[0016] As preferred, the clamping device further comprises a fixing rod and a fixing clamp plate, the clamping platform being provided with a mounting hole, the fixing rod being inserted into the mounting hole, and the fixing clamp plate being capable of being locked on the fixing rod, and the sensor body being capable of being clamped between the fixing clamp plate and the clamping platform.

[0017] As preferred, the moving device comprises a fixing plate connected to the moving platform, the fixing plate being provided with a fixing groove, and the pull wire end being clamped in the fixing groove.

[0018] As preferred, the moving device comprises a metal plate connected to the moving platform and a magnetic adsorption structure magnetically adsorbed to the metal plate, and the pull wire end being clamped between the magnetic adsorption structure and the metal plate.

[0019] A calibration method for calibrating the pull wire displacement sensor using the calibration equipment, characterized in that the method comprises the following steps:

[0020] S100: fixing the sensor body on the clamping platform and fixing the pull wire end on the moving platform;

[0021] S200: adjusting the clamping platform through the inclination table;

[0022] S300: Adjust and fix the position of the line scale so that the line scale is parallel to the measuring slide rail;

[0023] S400: Take one line of the linear scale as the zero point, and set the digital display in the grating scale assembly and the sensor body to the zero point respectively;

[0024] S500: Drive the moving device to move. When the moving device moves to a preset position, the reading displayed by the digital display connected to the grating ruler assembly is used as the first reading. The first reading is combined with the lines of the grating ruler to obtain the scale reading on the grating ruler as the second reading.

[0025] S600: The sensitivity of the wire-type displacement sensor is adjusted by comparing the second reading with the reading on the sensor body, thereby calibrating the wire-type displacement sensor.

[0026] The beneficial effects of this invention are:

[0027] This invention provides a calibration device for a wire-type displacement sensor. The sensor body is fixed on a clamping platform. An inclinometer allows adjustment of the platform's tilt angle and direction, enabling adjustment of the direction of the pulled wire from the sensor. This adjusts the parallelism between the straight line formed by the sensor body and the wire end and the moving trajectory of the platform, effectively reducing Abbe error during calibration and improving calibration accuracy. During reading the wire-type displacement sensor, the combination of a grating ruler assembly and a linear scale increases the number of reading positions compared to gauge blocks, improving the stability and accuracy of readings during wire end movement. Furthermore, the readings from the grating ruler assembly are used to obtain the linear scale readings, enhancing reading accuracy and further improving the calibration precision of the wire-type displacement sensor.

[0028] The present invention provides a calibration method for a wire-type displacement sensor. By setting up an inclinometer, the Abbe error can be effectively reduced at the initial stage of calibration by adjusting the tilt angle and direction of the clamping platform. During the calibration reading process, the scale reading of the linear scale is determined by the reading of the digital display in the grating scale assembly. The error of the wire-type displacement sensor is obtained based on this reading and the output value of the wire-type displacement sensor. By improving the reading accuracy, the error accuracy is improved, thereby improving the calibration accuracy of the wire-type displacement sensor. Attached Figure Description

[0029] Figure 1 This is the first isometric view of the wire-type displacement sensor calibration device provided by the present invention;

[0030] Figure 2This is the second isometric view of the wire-type displacement sensor calibration device provided by the present invention.

[0031] In the picture:

[0032] 1. Base; 101. First plate; 102. Second plate; 103. Side plate;

[0033] 2. Clamping device; 201. Clamping platform; 2011. Mounting hole; 2021. Fixing rod; 2022. Fixing clamping plate; 203. Inclined table; 2041. Auxiliary plate; 2042. Auxiliary groove;

[0034] 3. Moving device; 301. Moving platform; 3011. Observation hole; 3021. Fixing plate; 3022. Fixing groove; 303. Lifting rod; 304. First locking mechanism;

[0035] 4. Transmission device; 401. Transmission screw; 402. Transmission nut;

[0036] 5. Guiding device; 501. Guide rail; 502. Guide slider;

[0037] 601. Grating ruler assembly; 6011. Moving end; 6012. Measuring slide rail; 6013. Digital display; 602. Linear ruler;

[0038] 7. Visual devices;

[0039] 8. Transmission handwheel; 801. Second locking mechanism;

[0040] 9. Speed ​​reducer. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0043] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0044] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1 and Figure 2 As shown, the present invention provides a wire-type displacement sensor calibration device to solve the problem that the calibration of wire-type displacement sensors in the prior art is prone to Abbe error and the calibration effect is not ideal.

[0047] Reference Figure 1 and Figure 2 The wire-type displacement sensor calibration device includes a base 1, on which a clamping device 2, a moving device 3, a grating ruler assembly 601, and a linear scale 602 are mounted. The clamping device 2 includes an inclinometer 203 and a clamping platform 201 mounted on the inclinometer 203. The clamping platform 201 is used to fix the sensor body, and the inclinometer 203 is used to adjust the tilt direction and tilt angle of the clamping platform 201. The moving device 3 includes a moving platform 301, on which the wire end of the wire-type displacement sensor is fixed. The grating ruler assembly 601 includes a measuring slide rail 6012 and a moving end 6011 slidably connected to the measuring slide rail. The moving end 6011 is connected to the moving platform 301, thereby allowing the moving platform 301 to be slidably connected to the measuring slide rail 6012 via the moving end 6011. The movement trajectory of the moving platform 301 is parallel to the length direction of the measuring slide rail 6012. The linear scale 602 is positioned between the moving platform 301 and the base 1, and the linear scale 602 is parallel to the measuring slide rail 6012.

[0048] During the calibration process, the operator connects the sensor body to the clamping platform 201 and the pull wire end to the moving platform 301. Then, the operator adjusts the tilt direction and tilt angle of the clamping platform 201 by adjusting the tilt table 203, thereby adjusting the pull direction and pull angle of the pull wire end. This makes the pull wire between the pull wire end and the sensor body parallel to the measuring slide rail 6012, that is, it adapts to the moving trajectory of the moving platform 301. This makes the pull wire between the pull wire end and the sensor body a straight line and improves the parallelism between the pull wire end and the moving trajectory of the moving platform 301. This effectively reduces the Abbe error generated during the calibration of the pull wire displacement sensor, thereby improving the calibration accuracy of the pull wire displacement sensor.

[0049] During the reading process, the grating ruler assembly 601 can continuously read the data, thus increasing the number of reading positions compared to gauge blocks. This facilitates readings when the wire end is in different positions and improves the stability and accuracy of the readings during the movement of the wire end of the wire-type displacement sensor. The line scale 602 has high reading accuracy but no scale value, allowing the operator to obtain the line reading on the line scale 602 based on the reading of the grating ruler assembly 601. This makes the readings of the wire end more accurate. By measuring the displacement of the wire end of the wire-type displacement sensor, the readings of the grating ruler assembly 601 and the line readings on the line scale 602 are used to calibrate the wire-type displacement sensor, thereby improving the calibration accuracy of the wire-type displacement sensor.

[0050] By setting the base 1, the clamping device 2, the moving device 3, and the grating ruler assembly 601 have a relatively fixed positional relationship. During the calibration process, the relative movement of each device and assembly can be avoided to prevent it from affecting the calibration accuracy, which facilitates the operator's use of the calibration equipment.

[0051] Reference Figure 1 and Figure 2 The calibration equipment also includes a vision device 7, which is mounted on the moving platform 301. The vision device 7 is used to observe the lines on the line ruler 602. By using the vision device 7 to observe the lines on the line ruler 602, the corresponding lines on the line ruler 602 can be observed more accurately and clearly than by direct observation by the operator. This reduces the probability of increased errors due to incorrect observation of the lines and improves the accuracy of the calibration process.

[0052] Optionally, refer to Figure 1 and Figure 2In this application, the moving platform 301 is located on the side of the line ruler 602 away from the base 1. An observation hole 3011 is provided on the moving platform 301, through which the vision device 7 can observe the lines on the line ruler 602. The vision device 7 is an optical microscope. A lifting rod 303 is provided on the moving platform 301, allowing the optical microscope to move up or down along the lifting rod 303, thus moving it away from or closer to the observation hole 3011. A first locking mechanism 304 is also provided on the lifting rod 303, used to fix the optical microscope to the lifting rod 303.

[0053] In this application, the form of the first locking mechanism 304 is not limited, as long as it can fix the optical microscope to the lifting rod 303. Those skilled in the art can choose the appropriate form. For example, the first locking mechanism 304 includes a locking block and a locking screw. The locking block is slidably fitted onto the lifting rod 303, and the optical microscope is connected to the locking block, allowing the optical microscope to slide together with the locking block on the lifting rod 303. A threaded hole is provided on the locking block, and the locking screw can be threaded into the threaded hole on the locking block, so that the locking screw abuts against the side wall of the lifting rod 303, thereby fixing the locking block to the lifting rod. The observation hole 3011, the optical microscope, and the line scale 602 correspond to each other, enabling the optical microscope to accurately observe the lines on the line scale 602.

[0054] During the process of connecting the pull wire end to the moving platform 301, the operator rotates the locking screw away from the lifting rod 303, disengaging the locking screw from the lifting rod 303. This allows the operator to move the vision device 7 along the lifting rod 303 away from the observation hole 3011, providing operating space for connecting the pull wire end. When the pull wire end is connected to the moving platform 301, the operator moves the vision device 7 along the lifting rod 303 towards the observation hole 3011, bringing the vision device 7 closer to the line scale 602 and improving the accuracy of the reading process. The vision device 7 uses an optical microscope to more clearly observe the lines on the line scale 602.

[0055] Optionally, refer to Figure 1 and Figure 2 The base 1 is also equipped with a guide device 5 and a transmission device 4. The base 1 includes a first plate 101, a second plate 102, and two spaced side plates 103. The two side plates 103 support and connect the first plate 101 and the second plate 102, forming an installation space. The first plate 101 and the second plate 102 are parallel to each other. A linear scale 602 is located on the side of the first plate 101 away from the second plate 102 and abuts against the first plate 101. The guide device 5 is located inside the installation space. The length direction of the measuring slide rail 6012 is also parallel to the length direction of the first plate 101.

[0056] The clamping device 2 is located on the side of the two side plates 103 away from the first plate 101. The moving platform 301 moves along the length direction of the first plate 101, and the unidirectional stroke of the moving platform 301 is not less than 1000 mm. The measuring slide rail 6012 of the grating ruler assembly 601 is located on one side of the width direction of the base 1 and is fixedly connected to the base 1. The length direction of the measuring slide rail 6012 of the grating ruler assembly 601 is parallel to the length direction of the first plate 101.

[0057] By setting the first plate 101 and the second plate 102, the length direction of the first plate 101 and the length direction of the measuring slide rail 6012 are ensured to be parallel to each other at the beginning of the calibration equipment processing. This reduces the workload of the operator in the later calibration process and also ensures the accuracy of the calibration.

[0058] During calibration, the operator fixes the sensor body onto the clamping device 2 and adjusts the linear scale 602 to be parallel to the length direction of the first plate 101. The moving platform 301 moves along the length direction of the first plate 101, and the unidirectional travel of the moving platform 301 is not less than 1000mm, enabling calibration of wire-type displacement sensors within 1000mm. As the moving platform 301 moves along the length direction of the first plate 101, the length direction of the measuring slide rail 6012 of the grating scale assembly 601 is parallel to the length direction of the first plate 101. The fixed connection between the measuring slide rail 6012 of the grating scale assembly 601 and the base 1 ensures the parallelism between the length direction of the measuring slide rail 6012 and the moving trajectory of the moving platform 301, effectively reducing the Abbe error generated during the calibration of wire-type displacement sensors.

[0059] Reference Figure 1 and Figure 2 The base 1 is also equipped with a guide device 5, which includes a guide rail 501 and a guide slider 502 slidably connected to the guide rail 501. The guide rail 501 is fixedly mounted on the base 1 and is arranged along the length of the base 1. The moving platform 301 is fixedly connected to the guide slider 502. The linear scale 602 and the pull wire between the pull wire end and the sensor body are both parallel to the guide rail 501.

[0060] During the movement of the mobile platform 301, the mobile platform 301 drives the guide slider 502 to move on the guide rail 501. The guide rail 501 provides guidance for the movement of the mobile platform 301, further ensuring the movement trajectory of the mobile platform 301.

[0061] Optionally, refer to Figure 1 and Figure 2The guide device 5 has two sets, with two guide rails 501 arranged parallel to each other. Both guide rails 501 are connected to the first plate 101 and are parallel to the length direction of the first plate 101. There is a gap between the moving platform 301 and the second plate 102. The moving platform 301 has a U-shaped structure. The two vertical plates of the moving platform 301 are connected to the two guide sliders 502. The horizontal plate connected between the two vertical plates is used to install the vision device 7. The moving platform 301 spans both sides of the base 1 in the length direction. A line ruler 602 is set between the two guide rails 501.

[0062] The two guide rails 501 make the guide structure more stable, enhance the guiding effect on the moving platform 301, and further restrict the movement trajectory of the moving platform 301. The U-shaped structure of the moving platform 301 allows it to span both sides of the base 1 along its length, with the line scale 602 located below the moving platform 301, further facilitating the observation of the lines on the line scale 602 by the optical microscope.

[0063] Reference Figure 1 and Figure 2 The base 1 is also equipped with a transmission device 4 and a transmission handwheel 8. The input end of the transmission device 4 is connected to the transmission handwheel 8, and the output end of the transmission device 4 is connected to the mobile platform 301.

[0064] During the movement of the mobile platform 301, the operator can operate the transmission handwheel 8 to drive the mobile platform 301 through the transmission device 4, which improves the continuity and uniformity of the movement of the mobile platform 301 compared to the operator directly operating the mobile platform 301.

[0065] Furthermore, referring to Figure 1 and Figure 2 The transmission device 4 includes a transmission screw 401 and a transmission nut 402. The transmission screw 401 is located between two side plates 103 and is rotatably connected to the two side plates 103 via bearings. The transmission nut 402 is connected to the moving platform 301. A reducer 9 is connected between the transmission screw 401 and the transmission handwheel 8. The transmission handwheel 8 is directly connected to the input end of the reducer 9. The output end of the transmission screw 401 and the reducer 9 are connected via a coupling. The reducer 9 is located on the side of the clamping device 2 opposite to the side plate 103. By setting a reducer 9 between the transmission screw 401 and the transmission handwheel 8, the transmission speed can be reduced, making the entire transmission device 4 operate more smoothly, improving durability, and increasing service life.

[0066] Optionally, refer to Figure 1 and Figure 2A second locking mechanism 801 is provided on the transmission handwheel 8 to lock the rotation of the transmission handwheel 8. By providing the second locking mechanism 801, after the moving platform 301 has moved a certain distance, the operator can lock the rotation of the transmission handwheel 8, thus fixing the moving platform 301 in a certain position for reading operations. This improves the stability during the reading process and reduces the probability of reading errors due to the unstable fixing of the moving device 3.

[0067] In this application, the form of the second locking mechanism 801 is not limited, as long as it can lock the rotation of the transmission handwheel 403. Those skilled in the art can choose the appropriate form. For example, the second locking mechanism includes a locking plate fixedly mounted on the side wall of the reducer 9. Both the locking plate and the shaft of the transmission handwheel have pin holes, and pins are inserted into the two pin holes. When the pins are simultaneously inserted into the two pin holes, the rotation of the transmission handwheel is restricted. When the pins are removed from the two pin holes, the transmission handwheel 8 can rotate normally, thereby driving the movement of the moving platform 301.

[0068] Reference Figure 1 and Figure 2 The clamping device 2 also includes a fixing rod 2021 and a fixing clamping plate 2022. The clamping platform 201 has a mounting hole 2011. The fixing rod 2021 is inserted into the mounting hole 2011, and the fixing clamping plate 2022 is fixedly sleeved on the fixing rod 2021 for locking. The fixing clamping plate 2022 is used to clamp and fix the sensor body to the clamping platform 201. By using the fixing clamping plate 2022, the sensor body can be fixed more conveniently.

[0069] Furthermore, there are two mounting holes 2011, two fixing rods 2021, and two fixing clamps 2022. The two fixing clamps 2022 can clamp the two sides of the sensor body, improving the clamping and fixing effect of the fixing clamps 2022 on the sensor body.

[0070] Optionally, the fixing clamp 2022 can slide up and down along the fixing rod 2021, and the fixing clamp 2022 is configured as an elastic clamp. During the process of fixing the sensor body, the operator releases the fixing clamp 2022 and slides it upwards, then places the sensor body on the clamping platform 201, and then slides the fixing clamp 2022 downwards and fixes it to the fixing rod 2021, thus clamping the sensor body. The elastic design of the fixing clamp 2022 further facilitates the clamping of the sensor body and reduces wear on the surface of the sensor body.

[0071] Optionally, refer to Figure 1 and Figure 2Two mounting holes 2011 are considered as a group, and multiple groups of mounting holes 2011 are provided, with the groups of mounting holes 2011 distributed at intervals. The interval arrangement of multiple groups of mounting holes 2011 allows the fixing rod 2021 to be inserted into different positions on the clamping platform 201, enabling the clamping and fixing of the sensor body on wire-type displacement sensors of different models and sizes, thus improving the applicability of the calibration equipment.

[0072] In one implementation, refer to Figure 1 and Figure 2 The mobile device 3 includes a fixing plate 3021 connected to the mobile platform 301. The fixing plate 3021 has a fixing groove 3022, and the pull cable end can be snapped into the fixing groove 3022 to achieve connection between the pull cable end and the fixing plate 3021. The snap-fit ​​method makes it easier to fix the pull cable end to the fixing plate 3021.

[0073] Optionally, refer to Figure 1 and Figure 2 An auxiliary plate 2041 is provided on the side of the clamping platform 201 away from the fixing rod 2021. An auxiliary groove 2042 is provided on the auxiliary plate 2041, corresponding to the fixing groove 3022 on the fixing plate 3021. By setting the auxiliary plate 2041 and auxiliary groove 2042, they correspond to the fixing plate 3021 and fixing groove 3022. When the sensor body is clamped onto the clamping platform 201, the side wall of the sensor body near the auxiliary plate 2041 abuts against the auxiliary plate 2041, allowing the pull wire pulled from the sensor body to pass directly through the auxiliary groove 2042 and connect to the fixing groove 3022 on the fixing plate 3021. When the operator adjusts the pull wire between the sensor body and the pull wire end, they can directly adjust the direction and angle of the pull wire between the auxiliary groove 2041 and the fixing groove 3022, making the pull wire between the auxiliary groove 2041 and the fixing groove 3022 parallel to the length direction of the first plate.

[0074] In another implementation, refer to Figure 1 and Figure 2 Figure 1 Figure 2 The fixing plate 3021 is a metal plate, and a magnetic structure can be provided on the fixing plate 3021. The pull wire end is clamped between the magnetic structure and the fixing plate 3021. Optionally, the pull wire end of some types of pull wire displacement sensors is itself magnetic and can be directly attracted to the fixing plate 3021 to fix the pull wire end of the pull wire displacement sensor.

[0075] The present invention also provides a calibration method using the calibration equipment described in this application, comprising:

[0076] S100: Fix the sensor body on the clamping platform 201 and fix the pull wire end on the moving platform 301;

[0077] S200: Adjust the direction and angle of the clamping platform 201 using the tilting table 203;

[0078] S300: Adjust and fix the position of the line scale 602 so that the line scale 602 is parallel to the measuring slide rail 6012;

[0079] S400: Take one line of the linear scale 602 as the zero point, and set the digital display 6013 in the grating scale assembly 601 and the sensor body to the zero point respectively;

[0080] S500: Drive the moving device 3 to move. When the moving device 3 moves to the preset position, the reading displayed by the digital display 6013 connected to the grating ruler assembly 601 is used as the first reading. The first reading is combined with the lines of the grating ruler 602 to obtain the scale reading on the grating ruler 602 as the second reading.

[0081] Optionally, multiple preset positions can be set. By setting multiple preset positions and taking readings at each preset position, and then combining the multiple readings to calibrate the wire displacement sensor, the calibration accuracy can be improved.

[0082] During the reading process, for example, the digital display reads 36.020 mm, and then, combined with the lines on the scale, a further reading of 36.0 mm can be obtained. By reading the scale on the scale, the reading accuracy of the digital display in the grating ruler assembly is improved, thereby improving the calibration accuracy.

[0083] S600: The sensitivity of the wire-type displacement sensor is adjusted by comparing the second reading with the reading on the sensor body, thereby calibrating the wire-type displacement sensor.

[0084] The angle and direction of the clamping platform 201 are adjusted by the tilting stage 203, thereby adjusting the angle and direction of the pull wire between the sensor body and the pull wire end. This ensures that the pull wire between the sensor body and the pull wire end is parallel to the length direction of the measuring slide rail, thus improving the parallelism between the pull wire between the sensor body and the pull wire end, the length direction of the measuring slide rail 6012, the length direction of the linear scale 602, and the movement trajectory of the moving platform 301, effectively reducing the Abbe error during the calibration process. During the calibration reading process, the scale reading of the linear scale 602 is determined by the reading of the digital display 6013 in the grating scale assembly 601. The error of the pull wire displacement sensor is obtained based on this reading and the output value of the pull wire displacement sensor. By improving the reading accuracy, the error accuracy is improved, thereby improving the calibration accuracy of the pull wire displacement sensor.

[0085] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A calibration method for a wire-type displacement sensor calibration device, comprising a wire-type displacement sensor calibration device, wherein the wire-type displacement sensor includes a sensor body and a wire end, characterized in that, The wire-type displacement sensor calibration device includes a base (1), and the base (1) is provided with: The clamping device (2) includes an inclinometer (203) and a clamping platform (201) disposed on the inclinometer (203), the clamping platform (201) being used to fix the sensor body; The moving device (3) includes a moving platform (301) for fixing the end of the pull wire; The grating ruler assembly (601) includes a measuring slide rail (6012) and a movable end (6011) slidably connected to the measuring slide rail (6012). The movable end (6011) is connected to the movable platform (301), and the moving trajectory of the movable platform (301) is parallel to the measuring slide rail (6012). A linear scale (602) is provided, which is parallel to the measuring slide rail (6012). The calibration method for the wire-type displacement sensor calibration equipment includes: S100: Fix the sensor body on the clamping platform (201) and fix the pull wire end on the moving platform (301); S200: Adjust the clamping platform (201) using the tilting table (203); S300: Adjust and fix the position of the line scale (602) so that the line scale (602) is parallel to the measuring slide rail (6012); S400: Take one line of the line ruler (602) as the zero point, and set the digital display (6013) in the grating ruler assembly (601) and the sensor body to the zero point respectively; S500: Drive the moving device (3) to move. When the moving device (3) moves to the preset position, the reading displayed by the digital display (6013) connected through the grating ruler assembly (601) is used as the first reading. The first reading is combined with the lines of the grating ruler (602) to obtain the scale reading on the grating ruler (602) as the second reading. S600: The sensitivity of the wire-type displacement sensor is adjusted by comparing the second reading with the reading on the sensor body, thereby calibrating the wire-type displacement sensor.

2. The calibration method for the wire-type displacement sensor calibration device according to claim 1, characterized in that, It also includes a vision device (7) disposed on the mobile platform (301), the vision device (7) being used to observe the lines on the line ruler (602).

3. The calibration method for the wire-type displacement sensor calibration device according to claim 1, characterized in that, The base (1) is also provided with a guide device (5), which includes a guide rail (501) and a guide slider (502) slidably connected to the guide rail (501). The guide rail (501) is fixed to the base (1), and the moving platform (301) is connected to the guide slider (502). The line ruler (602) and the pull wire between the pull wire end and the sensor body are both parallel to the guide rail (501).

4. The calibration method for the wire-type displacement sensor calibration device according to claim 3, characterized in that, The guide device (5) is provided in two sets, the two guide slide rails (501) are parallel to each other, the moving platform (301) is in the shape of a door, the two ends of the moving platform (301) are respectively connected to the guide sliders (502) of the two guide devices (5), and the line ruler (602) is set between the two guide slide rails (501).

5. The calibration method for the wire-type displacement sensor calibration device according to claim 4, characterized in that, The base (1) includes a first plate (101), a second plate (102), and two spaced-apart side plates (103). The two side plates (103) support and connect the first plate (101) and the second plate (102) to form an installation space. The first plate (101) and the second plate (102) are arranged in parallel. The line ruler (602) is located on the side of the first plate (101) away from the second plate (102). The guide device (5) is located in the installation space. The guide rail (501) is fixed to the second plate (102).

6. The calibration method for the wire-type displacement sensor calibration device according to any one of claims 1-5, characterized in that, The base (1) is also provided with a transmission device (4) and a handwheel (8). The input end of the transmission device (4) is connected to the handwheel (8), and the output end of the transmission device (4) is connected to the moving platform (301). The handwheel (8) drives the moving platform (301) to move through the transmission device (4). The handwheel (8) includes a second locking mechanism (801). The handwheel (8) can be locked or unlocked by locking the second locking mechanism (801). The handwheel (8) is connected to the input end of the reducer (9). The reducer (9) can precisely transmit and control the rotation of the handwheel and make operation more labor-saving and safer.

7. The calibration method for the wire-type displacement sensor calibration device according to claim 1, characterized in that, The clamping device (2) further includes a fixing rod (2021) and a fixing clamping plate (2022). The clamping platform (201) has an installation hole (2011). The fixing rod (2021) is inserted into the installation hole (2011). The fixing clamping plate (2022) can be locked onto the fixing rod (2021). The sensor body can be clamped between the fixing clamping plate (2022) and the clamping platform (201).

8. The calibration method for the wire-type displacement sensor calibration device according to claim 1, characterized in that, The mobile device (3) includes a fixed plate (3021) connected to the mobile platform (301), and a fixed groove (3022) is provided on the fixed plate (3021), and the pull wire end is snapped into the fixed groove (3022).

9. The calibration method for the wire-type displacement sensor calibration device according to claim 1, characterized in that, The mobile device (3) includes a metal plate connected to the mobile platform (301) and a magnetic attraction structure magnetically adsorbed onto the metal plate, with the pull wire end clamped between the magnetic attraction structure and the metal plate.

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