A wheeled range finder calibration device and method

Abstract

The application discloses a kind of wheeled range finder calibration device and method, the measurement efficiency and measurement accuracy of the measuring wheel of wheeled range finder can be improved by the device;The device includes base, support mechanism, disc type measuring mechanism, moving mechanism, lifting mechanism and power device;It also includes controller, controller is set to control power device, so that power device starts or stops working;Controller is also set to control disc type measuring mechanism, so that disc type measuring mechanism starts or stops measurement;Controller is also set to process the measurement data of disc type measuring mechanism, and the processing result is output to display terminal;Controller is also set to input and process the parameters of measuring wheel, and adjust the moving position of support mechanism, disc type measuring mechanism according to the processing result.

Description

Technical Field

[0001] This invention relates to the field of calibration technology for wheel rangefinders, and more particularly to a wheel rangefinder calibration device and method. Background Technology

[0002] A wheel distance measuring instrument is a specialized instrument used to measure indoor and outdoor ground distances. It has a measuring wheel of known diameter, and distance is measured by counting the number of revolutions of the measuring wheel. It is a commonly used measuring tool in engineering construction operations. During use, the measuring wheel of a wheel distance measuring instrument needs to be calibrated regularly to reduce measurement errors.

[0003] Calibration of wheel rangefinders involves calibration of the measuring wheel and calibration of the indication error. The measurement parameters of the measuring wheel include the wheel diameter, radial runout, axial runout, and axial misalignment. In the calibration process of the measuring wheel, the existing method is to use multiple measuring instruments to measure different parameters to achieve calibration. For example, a general caliper is used to measure the diameter, and a dial indicator is used in conjunction with a test frame to measure other parameters of the measuring wheel. For the indication error of the wheel rangefinder, a steel tape measure is used for measurement. This measurement method suffers from several drawbacks, including low efficiency and low accuracy. For example, the measurement process involves changing various measuring tools and adjusting multiple measuring positions, making the steps cumbersome and inefficient. When using a general-purpose caliper to measure diameter, manual alignment and reading are required, leading to significant alignment and reading errors. When the caliper reading face is perpendicular to the measuring wheel, alignment errors occur if the line connecting the caliper measuring points does not pass through the center of the measuring wheel. Similarly, when the caliper reading face is parallel to the measuring wheel, reading errors occur if the line connecting the caliper measuring points is not parallel to the surface of the measuring wheel. The dial indicator has a range of 0-10mm and a graduation of 0.01mm, resulting in low accuracy and measurement errors. Furthermore, the dial indicator requires manual reading, which can introduce reading errors due to the reading angle. The measurement results also require manual recording, leading to data entry errors. Summary of the Invention

[0004] One of the objectives of this invention is, at least, to provide a wheel rangefinder calibration device and method to overcome the problems existing in the prior art, thereby improving measurement efficiency and accuracy by using an automated measuring device to calibrate the measuring wheel of the wheel rangefinder.

[0005] To achieve the above objectives, the technical solution adopted by the present invention includes the following aspects.

[0006] A wheel-type rangefinder calibration device, comprising: The base is designed for a fixed wheel-type rangefinder. A support mechanism, mounted on the base, is used to support the disc-type measuring mechanism; The disc-type measuring mechanism is configured to measure various parameters of the measuring wheel of the wheel-type rangefinder; The moving mechanism is configured to adjust the horizontal position of the support mechanism on the base and the horizontal position of the lifting mechanism on the support mechanism, respectively, in order to adjust the horizontal position of the disc measuring mechanism. The lifting mechanism is configured to adjust the height of the disc measuring mechanism on the support mechanism. The power unit provides power for the movement of the support mechanism, the movement of the lifting mechanism, and the height adjustment of the disc measuring mechanism. It also includes a controller, which is configured to control the power unit to start or stop working and move the disc measuring mechanism to a preset position; the controller is also configured to control the disc measuring mechanism to start or stop measuring; the controller is also configured to process the measurement data of the disc measuring mechanism and output the processing results to a display terminal; the controller is also configured to input and process the parameters of the measuring wheel and adjust the moving position of the disc measuring mechanism according to the processing results.

[0007] Preferably, the disc-type measuring mechanism includes a measuring disc and a three-jaw support. The bottom of the three-jaw support is connected to the measuring disc, and the top of the three-jaw support is connected to a lifting mechanism. The measuring disc has a disc-shaped structure and includes a bottom wall and side walls. One or more pairs of first sensors are evenly arranged on the side walls, with two first sensors in each pair. The two first sensors in each pair are respectively located at both ends of the diameter of the side wall, and the two first sensors are coaxial. The sensor heads of the two first sensors are arranged opposite each other, and the axes of the two first sensors in each pair are parallel to the bottom wall of the measuring disc. Each first sensor is fitted into a sensor mounting hole on the side wall. A second through hole is axially arranged at the center of the bottom wall, and a force-applying mechanism is coaxially arranged in the second through hole. A third through hole is also radially arranged on the bottom wall, and the third through hole is spaced a certain distance from the second through hole. A second sensor is arranged in the third through hole, and the second sensor can slide within the third through hole.

[0008] Preferably, the force-applying mechanism includes a force-applying module, a force sensor for measuring the magnitude of the applied force is coaxially disposed at the bottom of the force-applying module, and a contact module is coaxially disposed at the bottom of the force sensor, the contact module being close to the rotation center of the measuring wheel to be measured.

[0009] Preferably, the support mechanism includes two parallel first and second columns, and a crossbeam, with the first and second columns and the crossbeam forming an inverted U-shaped structure. The lifting mechanism is mounted on the crossbeam and includes a lifting rod, a fixing plate, and a sleeve. The bottom of the lifting rod is connected to a three-claw support. The fixing plate is mounted on the top of the crossbeam, and its width is greater than that of the crossbeam. Along the width of the crossbeam, one or both ends of the fixing plate extend out of the crossbeam, and a lifting hole is provided on the surface of the fixing plate extending out of the crossbeam. The axis of the lifting hole is spaced a certain distance from the surface of the crossbeam. The sleeve is coaxially provided with an installation hole adapted to the lifting rod, and the sleeve is coaxially positioned at the lifting hole of the fixing plate. The lifting rod passes through both the fixing plate and the sleeve.

[0010] Preferably, the moving mechanism includes a first moving mechanism and a second moving mechanism. The first moving mechanism includes multiple sliders, multiple guide rails, and a rack. The multiple sliders are evenly arranged at the bottom of the first column and the second column, the guide rails are arranged at the top of the base, and the rack is arranged on the first side of the base. The second moving mechanism includes two guide rails and a rack. The two guide rails are arranged parallel to each other at the top of the crossbeam, the rack is arranged on the inner side of one of the guide rails, and the multiple sliders are arranged parallel to each other at the bottom of the fixed plate.

[0011] Preferably, the power unit includes a first motor, a second motor, and a third motor. The first motor is connected to a first gear, and the first gear meshes with the rack of the first moving mechanism. The second motor is connected to a second gear, and the second gear meshes with the rack on the lifting rod. The third motor is connected to a third gear, and the third gear meshes with the rack of the second moving mechanism.

[0012] Preferably, the base is provided with a clamping device for clamping and fixing the wheel-type rangefinder. The clamping device includes a first side plate and a second side plate, which are arranged opposite to each other. The first side plate is fixed on the base, and the second side plate is slidably disposed on the base. A lead screw is provided on the outer side of the second side plate, and a lead screw nut that cooperates with the lead screw is provided on the base. The lead screw nut is spaced a certain distance from the second side plate. One or more clamping components are respectively provided on the inner sides of the first and second side plates. The clamping components on the first side plate and the clamping components on the second side plate are arranged opposite to each other. The clamping components are fixedly or slidably connected to the first and second side plates.

[0013] Preferably, the clamping component includes a fixing member and a clamping member. The fixing member includes a fixing block, a mounting through hole in the middle of the fixing block, and connecting blocks at both ends of the fixing block. The connecting blocks are perpendicular to the fixing block, and the two connecting blocks and the fixing block form a U-shaped structure. The clamping member is connected to the connecting blocks at both ends, and the clamping member can rotate around the connecting shaft.

[0014] Preferably, a height adjustment device for adjusting the installation height of the wheel-type rangefinder is provided between the first side plate and the second side plate; the height adjustment device includes a height adjustment screw and a height adjustment sleeve, the height adjustment sleeve and the height adjustment screw are configured to cooperate, the bottom of the height adjustment screw is connected to the base and the top is connected to the height adjustment sleeve, the top of the height adjustment sleeve is connected to the measuring wheel main unit; the bottom of the height adjustment screw is coaxially provided with a mounting groove, and a magnet adapted to the mounting groove is provided in the mounting groove.

[0015] The present invention also provides a calibration method for a wheel rangefinder, wherein the aforementioned wheel rangefinder calibration device is used to calibrate the wheel rangefinder.

[0016] In summary, by adopting the above technical solution, the present invention has at least the following beneficial effects: By setting up a disc-type measuring mechanism, and installing a first sensor and a second sensor on the disc-type measuring mechanism, the diameter and radial runout parameters are measured by the first sensor, and the axial runout and axial movement parameters are measured by the second sensor. The first and second sensors can simultaneously measure radial runout and axial runout, which can improve measurement efficiency and measurement accuracy. By using an automated method to align the measuring disc of the disc-type measuring mechanism with the center of the wheel to be measured, the measurement accuracy can be further improved, and the alignment error and reading error during the alignment process of the wheel to be measured can be reduced. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a wheel-type measuring instrument calibration device according to an exemplary embodiment of the present invention.

[0018] Figure 2 yes Figure 1 Front view of the wheel-type measuring instrument calibration device.

[0019] Figure 3 yes Figure 1 Left view of the structure of the wheel-type measuring instrument calibration device.

[0020] Figure 4 yes Figure 1 Right view of the structure of the wheel-type measuring instrument calibration device.

[0021] Figure 5 This is a schematic diagram of the clamping device structure of an exemplary embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the clamping device holding the wheel-type rangefinder.

[0023] Figure 7 This is a cross-sectional view of the height adjustment device structure of an exemplary embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the disc-type measuring mechanism structure of an exemplary embodiment of the present invention.

[0025] Figure 9 yes Figure 8 A bottom view of the disc-type measuring mechanism structure.

[0026] Figure 10 This is a schematic diagram of the explosive structure of the force-adding mechanism according to an exemplary embodiment of the present invention.

[0027] Figure 11 yes Figure 10 Top view of the force-adding mechanism.

[0028] Figure 12 This is a schematic diagram of a stepped disk structure according to an exemplary embodiment of the present invention.

[0029] Figure 13 This is a schematic diagram of the control system of the wheel-type rangefinder calibration device according to an exemplary embodiment of the present invention.

[0030] Figure 14 This is a calibration flowchart of a wheel-type rangefinder according to an exemplary embodiment of the present invention.

[0031] In the diagram, the markings are as follows: 1-base, 2-support mechanism, 21-first column, 210-first adapter plate, 211-first motor, 212-first gear, 22-second column, 23-crossbeam, 3-disc measuring mechanism, 31-measuring disc, 311-bottom wall, 3110-pointer groove, 3111-second through hole, 3112-third through hole, 312-side wall, 32-three-jaw support, 321-support base, 322-support claw, 4-wheel rangefinder, 41-measuring wheel, 42-measuring wheel main unit, 43-telescopic rod, 5-fixing device, 51-first side plate, 5a-slide groove, 5b 52-First through hole, 53-Second side plate, 54-Clamping component, 55-Fixing component, 56-Fixing component, 57-Leading rod, 58-Handle, 59-Leading rod nut, 60-Height adjustment device, 61-Height adjustment leading rod, 610-Mounting groove, 62-Height adjustment sleeve, 63-Magnet, 7-Guide rail, 8-Slider, 9-Rack, 10-Lifting mechanism, 10a-Lifting rod, 10b-Fixing plate, 10c-Sleeve sleeve, 10c0 - Lifting slot, 10d- Second adapter plate, 10e- Second motor, 10f- Second gear, 11- Third motor, 11a- Third gear, 12- First sensor, 13- Second sensor, 14- Force application mechanism, 14a- Force application module, 14a0- First loading slot, 14a1- First mounting hole, 14a2- Second loading slot, 14b- Force sensor, 14b0- Screw hole, 14c- Contact module, 14c0- Screw. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that the objectives, technical solutions, and advantages of the present invention will be clearer. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0033] refer to Figures 1-4The wheel measuring instrument calibration device of the present invention, as exemplified in an exemplary embodiment, includes a base 1, a support mechanism 2, a disc measuring mechanism 3, a moving mechanism, a lifting mechanism 10, and a power device. The base 1 is used to fix the wheel rangefinder 4. The support mechanism 2 is mounted on the base 1 and supports the disc measuring mechanism 3. The disc measuring mechanism 3 is used to measure various parameters of the measuring wheel 41 of the wheel rangefinder 4. The moving mechanism is used to adjust the horizontal position of the support mechanism 2 on the base 1 and the horizontal position of the lifting mechanism 10 on the support mechanism 2, thereby adjusting the horizontal position of the disc measuring mechanism 3 so that the center of the disc measuring mechanism 3 is aligned with the center of the measuring wheel 41 or separated from the center of the measuring wheel 41 by a certain distance. The lifting mechanism 10 is used to adjust the height of the disc measuring mechanism 3 on the support mechanism 2. The power device provides power for the movement of the support mechanism 2, the movement of the lifting mechanism 10, and the height adjustment of the disc measuring mechanism 3. The device also includes a controller, which is configured to control the power unit to start or stop working and move the disc measuring mechanism 3 to a preset position; the controller is also configured to control the disc measuring mechanism 3 to start or stop measuring; the controller is also configured to process the measurement data of the disc measuring mechanism 3 and output the processing results to a display terminal; the controller is also configured to input and process the parameters of the measuring wheel 41 and adjust the moving position of the disc measuring mechanism 3 according to the processing results.

[0034] The base 1 is equipped with a clamping device 5 for holding and fixing the wheel-type rangefinder 4, for reference. Figure 1 , Figure 5 , Figure 6 The clamping device 5 includes a first side plate 51 and a second side plate 52, which are arranged opposite to each other. The first side plate 51 is fixed on the base 1, and the second side plate 52 is slidably arranged on the base 1. One or more clamping components 53 are respectively provided on the inner side surfaces (the sides of the first side plate and the second side plate that are close to each other) of the first side plate 51 and the second side plate 52. The clamping components on the first side plate 51 and the clamping components on the second side plate 52 are arranged opposite to each other. The clamping components 53 can be fixedly connected to the first side plate 51 and the second side plate 52, or they can be slidably connected to the first side plate 51 and the second side plate 52. When slidably connected, the position of the clamping components 53 on the first side plate 51 and the second side plate 52 can be adjusted according to the size of the measuring wheel main unit of the wheel rangefinder, so that the clamping components 53 clamp the wheel rangefinder.

[0035] The outer surfaces of the first side plate 51 and the second side plate 52 (the sides of the first side plate and the second side plate that are far apart from each other) are respectively provided with sliding grooves 5a. The sliding grooves 5a are waist-shaped grooves. The bottom surface of the sliding grooves 5a is coaxially provided with a first through hole 5b, which is a waist-shaped hole. The clamping component 53 can slide on the first side plate 51 or the second side plate 52 through the sliding grooves 5a and the first through hole 5b.

[0036] refer to Figure 5 The clamping component 53 includes a fixing member 531 and a clamping member 532. The fixing member 531 includes a fixing block, and connecting blocks are respectively provided at both ends of the fixing block. The connecting blocks are perpendicular to the fixing block, and the two connecting blocks and the fixing block form a U-shaped structure. The two ends of the clamping member 532 are respectively connected to the connecting blocks, and the clamping member 532 can rotate around the connecting shaft. The clamping member 532 and the connecting blocks can be connected by bearings or by a shaft and hole fit. When connected by a shaft and hole fit, a second through hole can be coaxially provided on the two opposite connecting blocks, and a third through hole can be axially provided on the clamping member 532. The connecting shaft passes through the second through hole on the connecting block and the third through hole on the clamping member 532 simultaneously, so that the clamping member 532 is connected to the connecting block. A wedge-shaped groove is provided on the side of the clamping member 532 opposite to the connecting shaft. The wedge-shaped groove is V-shaped or arc-shaped and is used to clamp and press against the measuring wheel main body of the wheel-type rangefinder. The fixing block has a fourth through hole in the middle. The fixing member 531 can be installed at the first through hole 5b position of the first side plate 51 and the second side plate 52 respectively through the fourth through hole. During installation, the fixing member 531 can also be connected to the first through hole 5b position of the first side plate 51 and the second side plate 52 by a connecting shaft (or bolt), so that the clamping member 53 can slide back and forth in the slide groove 5a.

[0037] The first side plate 51 has an L-shaped or rectangular structure, and the second side plate 52 has a rectangular structure. A lead screw 54 is provided on the outer surface of the second side plate 52, and the lead screw 54 is rotatably connected to the second side plate 52. A handle 540 is provided at the end of the lead screw 54. A lead screw nut 55 that cooperates with the lead screw 54 is provided on the base 1. The lead screw nut 55 is spaced a certain distance from the second side plate 52. When the first side plate 51 is fixed on the base 1, rotating the handle 540, through the cooperation of the lead screw 54 and the lead screw nut 55, allows the second side plate 52 to move a certain distance relative to the first side plate 51, thereby clamping or releasing the wheel rangefinder 4. In actual use, the handle can also be replaced with a fourth motor. By controlling the movement state of the fourth motor, the distance between the second side plate 52 and the first side plate 51 can be adjusted, thereby allowing the clamping device to automatically release or quickly clamp the wheel rangefinder 4. The bottom of the second side plate 52 is provided with one or more guide blocks (the guide blocks can be rectangular blocks as shown in the figure, or other shapes). The corresponding position on the top of the base 1 is provided with a guide groove that matches the guide block. The guide groove is set along the length direction of the base (not shown in the figure). The guide block can improve the stability of the second side plate 52 moving on the base 1.

[0038] refer to Figure 6A height adjustment device 6 is provided between the first side plate 51 and the second side plate 52. The height adjustment device 6 is used to adjust the installation height of the wheel rangefinder 4, so that the clamping component of the clamping device can stably clamp the measuring wheel main body 42 of the wheel rangefinder 4. The height adjustment device 6 includes a height adjustment screw 61 and a height adjustment sleeve 62. The height adjustment sleeve 62 and the height adjustment screw 61 are configured to cooperate. The bottom of the height adjustment screw 61 is connected to the base 1, and the top is connected to the height adjustment sleeve 62. The top of the height adjustment sleeve 62 is connected to the bottom of the measuring wheel main body 42. Figure 1 , Figure 6 (Up and down direction) The top of the measuring wheel main unit 42 is rotatably connected to the measuring wheel 41; by rotating the height adjustment screw sleeve 62, the installation height of the measuring wheel 41 can be adjusted, so that the clamping component 53 clamps the measuring wheel main unit 42.

[0039] When placing the wheel rangefinder 4 on the height adjusting sleeve 62, a boss can be coaxially provided on the top of the height adjusting sleeve 62, and a groove (not shown in the figure) coaxially provided on the bottom of the measuring wheel main unit 42 to match the boss. The fit between the boss and the groove can position the wheel rangefinder (during use, the wheel rangefinder can also be positioned directly by using the height adjusting sleeve 62). Reference Figure 7 The bottom of the height adjustment screw 61 is coaxially provided with a mounting groove 610. A magnet 63 adapted to the mounting groove is provided in the mounting groove 610. When wheel rangefinders of different sizes are fixed by the clamping device, the mounting position of the height adjustment device between the first side plate 51 and the second side plate 52 can be adjusted by the magnet 63, increasing the flexibility of the wheel rangefinder 4 installation.

[0040] Continue to refer to Figures 1-4 The base 1 is also equipped with guide rails 7 (the number of guide rails is determined according to the actual installation needs), and four guide rails 7 are evenly arranged on both sides of the clamping device 5. The support mechanism 2 includes two parallel first columns 21 and second columns 22, and also includes a crossbeam 23. The crossbeam 23 is located on the top of the first columns 21 and second columns 22, and the two ends of the crossbeam 23 are connected to the first columns 21 and the second columns 22 respectively. The first columns 21, the second columns 22 and the crossbeam 23 form an inverted U-shaped structure. One or more sliders 8 are provided at the bottom of the first column 21 and the bottom of the second column 22. The sliders 8 are slidably connected to the guide rails 7, thereby adjusting the position of the support mechanism 2 and the disc measuring mechanism 3 on the base 1.

[0041] A rack 9 is also provided on the first side of the base 1 (the side near the first column and parallel to the guide rail on the base), and the rack 9 is arranged along the length of the first side. An L-shaped first adapter plate 210 is provided on the outer side of the first column 21 (the side of the first column and the second column that are far apart from each other). The first adapter plate 210 is located at the bottom of the first column 21. The first side of the first adapter plate 210 is connected to the first column 21, and the second side is provided with a first motor mounting hole. The first motor 211 is located on the second side of the first adapter plate 210. The first motor 211 is connected to the first gear 212, and the first gear 212 is meshed with the rack 9 on the first side of the base 1 to precisely control the movement position of the support mechanism 2 on the base 1 and improve the positioning accuracy of the disc measuring mechanism 3.

[0042] The height and horizontal position of the disc measuring mechanism 3 on the support mechanism 2 are adjustable. A lifting mechanism 10 is provided on the crossbeam 23 of the support mechanism 2. The disc measuring mechanism 3 is rotatably connected to the lifting mechanism 10. The height of the disc measuring mechanism 3 on the support mechanism 2 is adjusted by the lifting mechanism 10.

[0043] The lifting mechanism 10 includes a lifting rod 10a, a fixing plate 10b, and a connecting sleeve 10c. The bottom of the lifting rod 10a is connected to the disc measuring mechanism 3. The height of the disc measuring mechanism 3 can be adjusted by adjusting the height of the lifting rod 10a. The fixing plate 10b is located on the top of the crossbeam 23. The cross-section of the fixing plate 10b is rectangular or L-shaped, and its width is larger than the width of the crossbeam 23. Along the width direction of the crossbeam 23, one or both ends of the fixing plate 10b extend out of the crossbeam 23. A lifting hole is provided on the plate surface of the fixing plate 10b extending out of the crossbeam 23. The axis of the lifting hole is a certain distance away from the side of the crossbeam 23. When the lifting rod 10a passes through the lifting hole, the side of the lifting rod 10a is a certain distance away from the side of the crossbeam 23 (e.g., 3~5cm) to prevent interference during the lifting process of the lifting rod 10a. The sleeve 10c is coaxially provided with an installation hole that matches the lifting rod 10a. The sleeve 10c is coaxially positioned at the lifting hole of the fixing plate 10b, and the lifting rod 10a passes through both the fixing plate 10b and the sleeve 10c.

[0044] The lifting rod 10a is generally cylindrical in shape, with one side being flat. A rack 9 is provided along the height direction on the flat side of the lifting rod 10a. The sleeve 10c is also cylindrical in shape, with a lifting groove 10c0 radially arranged on its side, connecting to the mounting hole. A second adapter plate 10d is also provided on the fixing plate 10b, spaced a certain distance from the sleeve 10c. d has an L-shaped structure. The first side of the second adapter plate 10d is connected to the fixed plate 10b. The second side of the second adapter plate 10d is provided with a second motor mounting hole. The second motor 10e is installed on the second side of the second adapter plate 10d. The second motor 10e is connected to the second gear 10f. The second gear 10f is set in the lifting groove 10c0. The second gear 10f meshes with the rack 9 on the lifting rod 10a to precisely control the moving height of the disc measuring mechanism 3 relative to the crossbeam 23 and improve the positioning accuracy of the disc measuring mechanism 3.

[0045] Two parallel guide rails 7 are arranged on the top of the crossbeam 23. One or more sliders 8 adapted to the guide rails 7 are arranged at the bottom of the fixed plate 10b along the length of the crossbeam 23 (the number of sliders can be set according to actual installation needs). The sliders 8 can move the fixed plate 10b along the length of the crossbeam 23, thereby adjusting the horizontal position of the disc measuring mechanism 3 relative to the crossbeam 23. A rack 9 is arranged on the inner side of the guide rail 7 near the lifting rod 10a, and the rack 9 is arranged along the length of the guide rail 7. The fixed plate 10b is also provided with a third motor mounting hole, which is a certain distance away from the second adapter plate 10d. The third motor 11 is arranged at the third motor mounting hole on the fixed plate 10b. The third motor 11 is connected to the third gear 11a, and the third gear 11a is meshed with the rack on the guide rail 7 to precisely control the horizontal movement position of the disc measuring mechanism 3 relative to the crossbeam 23 and improve the positioning accuracy of the disc measuring mechanism 3.

[0046] refer to Figure 1 , Figure 8The disc-type measuring mechanism 3 includes a measuring disc 31 and a three-jaw support 32. The bottom of the three-jaw support 32 is connected to the measuring disc 31, and the top of the three-jaw support 32 is connected to the lifting rod 10a of the lifting mechanism 10. The three-jaw support 32 can rotate around the connecting shaft of the lifting rod 10a. The measuring disc 31 has a disc-shaped structure and includes a bottom wall 311 and a side wall 312. The three-jaw support 32 includes a support base 321 and support claws 322. The support base 321 has a cylindrical structure, and the top of the support base 321 is coaxially arranged with the lifting rod 10a. Three support claws 322 are evenly arranged circumferentially on the side wall of the support base 321. The support claws 322 have an L-shaped structure. The first side of the support claw 322 is connected to the support base 321, and the second side of the support claw 322 is connected to the bottom wall 311 of the measuring disc 31. The support base 321 and the measuring disc 31 are separated by a certain distance.

[0047] refer to Figure 8 , Figure 9 One or more pairs of first sensors 12 are evenly arranged on the sidewall 312 of the measuring disk 31. Each pair has two first sensors, which are respectively located at both ends of the diameter of the sidewall 312. The two first sensors are coaxial, and their sensor heads are arranged opposite each other. The axes of the two first sensors in each pair are parallel to the bottom wall 311 of the measuring disk, so that the measuring light rays of the first sensors are parallel to the surface of the bottom wall 311. When more pairs of first sensors 12 are arranged on the sidewall, the multiple pairs of first sensors 12 are evenly arranged circumferentially on the sidewall 312, with the two first sensors in each pair located at both ends of the diameter of the sidewall 312, and the two first sensors are coaxial. Preferably, there are four pairs of first sensors 12. The diameter of the measuring wheel 41 can be measured at one time by using four pairs of first sensors 12, improving measurement efficiency. The first sensors 12 are installed in the sensor mounting holes on the sidewall 312 and are used to measure the diameter and radial runout parameters of the measuring wheel 41. The first sensors 12 can be laser rangefinders, ultrasonic sensors, infrared sensors, or other rangefinders.

[0048] A pointer groove 3110 is provided on the bottom surface of the bottom wall 311 of the measuring disk 31. The pointer groove 3110 is arranged along the diameter direction of the measuring disk 31. When a pointer is provided on the measuring wheel 41, the pointer can be placed in the pointer groove 3110 to prevent the pointer from interfering with the measurement results.

[0049] A second through hole 3111 is axially arranged at the center of the bottom wall 311, and a third through hole 3112 is radially arranged on the bottom wall 311. The third through hole 3112 is coaxially arranged with one of the pointer slots 3110 (or it can be radially arranged at other positions on the bottom wall 311). The third through hole 3112 is separated from the second through hole 3111 by a certain distance. The third through hole 3112 is an oblong hole, and a second sensor 13 is arranged inside the third through hole 3112. The second sensor 13 can slide radially along the bottom wall 311 within the third through hole 3112. The second sensor 13 is used to measure the axial runout and axial movement parameters of the measuring wheel 41. The second sensor 13 can be a laser rangefinder, an ultrasonic sensor, an infrared sensor, or other rangefinder sensors.

[0050] A force-applying mechanism 14 is coaxially arranged inside the second through hole 3111 to apply force to the measuring wheel 41 of the wheel-type rangefinder 4 in order to measure the axial movement parameters of the measuring wheel 41; Reference Figure 10 The force-applying mechanism 14 includes a force-applying module 14a. A force sensor 14b for measuring the magnitude of the applied force is coaxially disposed at the bottom of the force-applying module 14a. A contact module 14c is coaxially disposed at the bottom of the force sensor 14b. The contact module 14c is close to the rotation center of the measuring wheel 41 to be measured, and the bottom of the contact module 14c is in contact with the top surface of the measuring wheel 41.

[0051] The contact module 14c has a screw 14c0 on its top, and the force sensor 14b has a screw hole 14b0 coaxially arranged at its bottom to mate with the screw 14c0. The contact module 14c and the force sensor 14b are threadedly connected. The force sensor 14b has multiple mounting screw holes on its top, which are arranged on the same circumference. The force application module 14a has a second loading groove 14a2 coaxially arranged at its bottom, and multiple first mounting holes 14a1 penetrating the force application module 14a are provided in the second loading groove 14a2 (see reference). Figure 11 The position of the first mounting hole 14a1 corresponds to the position of the mounting screw hole. The force sensor 14b and the force application module 14a are connected by screws. The top of the force application module 14a also has a first loading groove 14a0 coaxially provided, which is used to form an assembly space for the screw. The second through hole 3111 has an internal thread on its wall, and the side wall of the force application module 14a has an external thread that matches the internal thread. The force application module 14a is connected to the bottom wall 311 of the measuring plate by threads. When applying force through the force application mechanism 14, a tool that matches the first loading groove 14a0 is inserted into the first loading groove 14a0, and the force application module 14a is rotated (the force application module can also be rotated manually).

[0052] The size of the measuring disk 31 is adapted to the size of the measuring wheel 41 to be measured. During the application of the calibration device, the size of the measuring disk 31 can also be set to match the maximum size of the measuring wheel 41 (the diameter of the measuring disk is not less than the maximum diameter of the measuring wheel, the diameter of the second through hole matches the diameter of the columnar protrusion at the top of the maximum measuring wheel, and the columnar protrusion is a reference). Figure 1 Different sized stepped discs are coaxially arranged within the measuring disc 31. By replacing the stepped discs of different sizes, the measuring disc 31 can be adapted to measuring wheels of different diameters. The structure of the stepped discs can be found in [reference needed]. Figure 12 The stepped plate includes a base and a connecting platform. The connecting platform is coaxially positioned on top of the base, and the base and connecting platform are integrally formed. The structure of the base is the same as that of the bottom wall 311 of the measuring plate 31. The connecting platform is cylindrical, with a connecting hole coaxially positioned at its center. The outer diameter of the connecting platform matches the diameter of the second through hole 3111 of the measuring plate, and the inner diameter matches the diameter of the columnar protrusion on the top of the measuring wheel. Therefore, when measuring measuring wheels of different sizes, the stepped plate, which matches the measuring wheel, is simply installed at the second through hole 3111 of the measuring plate (the stepped plate is threaded to the measuring plate; for stepped plates of different sizes, the base dimensions are the same; the outer diameter of the connecting platform matches the diameter of the second through hole, and the inner diameter is set according to the diameter of the columnar protrusion on the measuring wheel). Combined with a force-applying mechanism whose dimensions match the inner diameter of the connecting platform, measuring wheels of different diameters can be calibrated. When a pointer is provided on the measuring wheel, a pointer groove is radially provided on the base of the stepped plate.

[0053] The device of the present invention is applicable not only to the calibration of the measuring wheel of a wheel-type rangefinder, but also to the calibration of other rollers.

[0054] refer to Figure 14 The present invention also provides a method for calibrating a wheel rangefinder using a wheel rangefinder calibration device, the method comprising the following steps: Step 1: Start the wheel rangefinder calibration device and reset the control system of the wheel rangefinder calibration device to make the control system work in the initial position; Step 2: Adjust the clamping device 5 on the base 1 to fix the wheel rangefinder 4 through the clamping device 5 and initially level it; The specific method for fixing the wheel-type rangefinder 4 is as follows: Rotate handle 540 or the fourth motor to move lead screw 54, which in turn moves the second side plate 52 to increase the distance between the first side plate 51 and the second side plate 52. Adjust the height of height adjustment sleeve 62 so that when the first side plate 51 and the second side plate 52 clamp the measuring wheel main unit 42 of the wheel rangefinder, there is a certain gap between the measuring wheel 41 and the top of the first side plate 51 and the second side plate 52, so that they will not interfere with each other. Then place the measuring wheel main unit 42 of the wheel rangefinder on the top of height adjustment sleeve 62 (when the top of the height adjustment sleeve is provided with a boss, align the groove at the bottom of the measuring wheel main unit 42 with the boss so that the groove and the boss cooperate). Perform preliminary leveling of the measuring wheel main unit 42 so that the measuring wheel 41 is kept horizontal. Leveling can be assisted by a level or spirit level. After the measuring wheel main unit 42 is leveled, rotate handle 540 or the fourth motor to move lead screw 54, which in turn moves the second side plate 52 so that the second side plate 52 presses against the measuring wheel main unit 42, thus fixing the wheel rangefinder 4. During the fixing process, rotate the clamping member 532 of the clamping component 53 so that the clamping member 532 is facing the side of the measuring wheel host 42. After the clamping member 532 is locked (it can be self-locked by bolts), adjust the positions of the two clamping members 53 on the first side plate 51 and the second side plate 52 respectively so that the two clamping members 53 are located at both ends of the surface of the measuring wheel host 42, thereby improving the stability of the fixing of the measuring wheel host 42.

[0055] Step 3: Determine the horizontal coordinates (x, y) of the geometric center of the measuring wheel 41 of the wheel rangefinder 4 in the calibration device, where x represents the lateral direction and y represents the longitudinal direction. When determining the coordinates, scribe lines can be set on the second and third sides of the base 1 (the second side is opposite to the first side, and the third side is perpendicular to the second side). The length or diameter of the measuring wheel main unit 42 can be determined by the scribe lines (when the measuring wheel main unit is cubic or cylindrical, the measuring wheel main unit is coaxial with the measuring wheel). The dimensions of the measuring wheel main unit 42 are input into the control system through the input device. The controller calculates the horizontal coordinates (x, y) of the geometric center of the measuring wheel 41 in the calibration device based on the initial position of the clamping device 5.

[0056] Step 4: Move the support mechanism and lifting mechanism to move the disc measuring mechanism to the preset position; After the controller calculates the coordinate position (x, y) of the measuring wheel 41, it calculates the distance between the center of the disc measuring mechanism and the center of the measuring wheel 41 based on the current coordinate position (a, b) of the center of the disc measuring mechanism. Then, it sends a control signal to control the power unit, which provides power to the movement of the support mechanism and the lifting mechanism, so that the disc measuring mechanism can automatically move to the preset position.

[0057] refer to Figure 13The movement of the support mechanism and the lifting mechanism is as follows: The controller sends a start signal to the first motor. After receiving the start signal, the first motor starts and moves the support mechanism in the x direction through the first moving mechanism. During the movement, the distance between x and a is continuously calculated. When x = a, the controller sends a stop signal to the first motor, causing the first motor to stop rotating. The controller sends a start signal to the third motor. After receiving the start signal, the third motor starts and moves the lifting mechanism in the y direction through the second moving mechanism. During the movement, the distance between y and b is continuously calculated. When y = b, the controller sends a stop signal to the third motor, causing the third motor to stop rotating. At this time, the disc measuring mechanism is positioned directly above the measuring wheel 41 of the wheel rangefinder, and the center of the disc measuring mechanism is aligned with the center of the measuring wheel 41.

[0058] Step 5: Measure the diameter of measuring wheel 41; The diameter measurement method is as follows: The controller sends a start signal to the second motor. Upon receiving the start signal, the second motor starts and adjusts the height of the disc measuring mechanism via a lifting mechanism. During the height adjustment process, the controller also sends a start signal to the second sensor, causing the second sensor on the disc measuring mechanism to measure the distance between the inner surface of the disc measuring mechanism and the top surface of the measuring wheel 41. When the inner surface of the disc measuring mechanism contacts the top surface of the measuring wheel 41 (when the distance is zero), the controller sends a stop signal to the second motor and a stop signal to the second sensor, causing the second motor to stop rotating and the second sensor to stop working. Then, the controller sends a control signal to the first sensor, causing one or more pairs of first sensors on the disc measuring mechanism to perform diameter measurement. After obtaining the measurement data, the first sensor transmits the measurement data to the controller for processing. The controller outputs the final processing result to the display terminal. The diameter of the measuring wheel 41 = inner diameter of the measuring disc - (first sensor reading + reading of the other first sensor opposite to it).

[0059] When the handle 540 of the clamping device 5 is replaced by the fourth motor, during the height adjustment of the disc measuring mechanism, when the distance between the inner surface of the disc measuring mechanism and the top surface of the measuring wheel is close to zero, the controller sends a start signal and a forward rotation signal to the fourth motor, causing the fourth motor to rotate forward to release the clamping device. When the inner surface of the disc measuring mechanism 3 is in full contact with the top surface of the measuring wheel (the distance is zero), the controller sends a reverse rotation signal to the fourth motor, causing the fourth motor to reverse and clamp the measuring wheel main body so that the line connecting the points measured by the first sensor is parallel to the top surface of the measuring wheel 41 and passes through its center. After the clamping device clamps the measuring wheel main body, the controller sends a stop signal to the fourth motor, causing the fourth motor to stop working.

[0060] When the measuring disc 31 of the disc-type measuring mechanism has only one pair of first sensors, after the first sensor measures the first set of data, the measuring wheel 41 is rotated 45 degrees clockwise or counterclockwise, and the first sensor measures the second set of data. This process is repeated until four sets of data are obtained. After processing the four sets of data, four diameter values ​​are obtained, and the average of these values ​​is the measured diameter. When the measuring disc 31 has four pairs of first sensors, the angle between adjacent first sensors is 45 degrees. The controller can make all four pairs of first sensors measure simultaneously, obtaining four sets of data at once. After processing the four sets of data, four diameter values ​​are obtained, and the average of these values ​​is the measured diameter.

[0061] Step 6: Measure the radial runout of measuring wheel 41; The controller sends a control signal to the second motor, which controls the lifting mechanism 10 to adjust the height of the disc measuring mechanism 3. This allows the first sensor to be aligned with different positions (preferably the center, slightly above the center, and slightly below the center) on the side of the measuring wheel 41. At each position, the measuring wheel 41 is manually rotated, and the controller controls one of the first sensors to perform measurements. Multiple sets of data are obtained at each measured section. The maximum difference between the data measured by the first sensor is the radial runout within the measured section of the measuring wheel 41. The maximum value of the results from the three measured sections is taken as the measurement result. During the measurement process, the measurement results from the first sensor are transmitted to the controller for processing, and the controller outputs the processing results to the display terminal.

[0062] Step 7: Measure the axial runout of the measuring wheel 41. Adjust the radial position of the second sensor on the disc measuring mechanism so that it aligns with the side rim of the measuring wheel 41. Manually rotate the measuring wheel 41, and the controller controls the second sensor to perform measurements, obtaining multiple sets of data. The maximum difference between the data measured by the second sensor is the radial runout within the cross-section measured by the measuring wheel 41. During the measurement process, the measurement results from the second sensor are transmitted to the controller for processing, and the controller outputs the processing results to the display terminal.

[0063] During the measurement process, steps six and seven can be performed simultaneously. That is, after aligning the second sensor with the side rim of the measuring wheel 41, the measuring wheel 41 is manually rotated, and the controller controls one of the first sensors and the second sensor to measure simultaneously to obtain radial runout and axial runout.

[0064] Step 8: Measure the axial movement of measuring wheel 41; The force-applying mechanism 14 is mounted on the disc-type measuring mechanism 3. The position of the support mechanism is adjusted by the first moving mechanism, and the position of the disc-type measuring mechanism 3 is adjusted by the second moving mechanism, so that the force-applying mechanism 14 is located on one side of the rotation center of the measuring wheel 41. The position of the second sensor on the disc-type measuring mechanism 3 is adjusted so that the second sensor is aligned with the other side of the rotation center of the measuring wheel 41, so that the force-applying mechanism and the second sensor are located on opposite sides of the rotation center of the measuring wheel 41. A force of (3~5) N is applied to the measuring wheel 41 by the force-applying mechanism 14. During the process of the force changing from (0~5) N, the change in the reading of the second sensor is the axial displacement value. The axial displacement value is transmitted to the controller for processing, and the controller outputs the processing result to the display terminal.

[0065] Step 9: Measure the indication error of the wheel rangefinder 4; Set the counter reading of the wheel rangefinder 4 to zero and note the display value of the measuring wheel main unit 42. Evenly attach multiple signal reflection points circumferentially to the side of the measuring wheel 41. Set a proximity switch sensor on the inner side of the side wall 312 of the measuring disk 31, with the proximity switch sensor parallel to the bottom wall 311 of the measuring disk 31 and facing the center of the measuring wheel 41. Manually rotate the measuring wheel 41 and measure the number of rotations of the measuring wheel 41 through the proximity switch sensor. Multiply the number of rotations by the circumference of the measuring wheel 41 to obtain the rotation distance of the measuring wheel 41. Compare the rotation distance with the counter reading; the difference is the indication error of the wheel rangefinder 4.

[0066] During the measurement process, the start / stop, forward / reverse rotation, and speed adjustment of the first, second, third, and fourth motors are all controlled by the controller. The first, second, third, and fourth motors can all be of the same type, such as stepper motors, AC / DC servo motors, etc.

[0067] The above description is merely a detailed illustration of specific embodiments of the present invention and is not intended to limit the invention. Various substitutions, modifications, and improvements made by those skilled in the art without departing from the principles and scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A calibration device for a wheel-type rangefinder, characterized in that, include: The base (1) is set as a fixed wheel-type rangefinder (4); Support mechanism (2) is set on base (1) and is used to support disc measuring mechanism (3). The disc measuring mechanism (3) is configured to measure one or more of the following: the diameter, radial runout, axial runout, axial movement, and number of rotations of the measuring wheel (41) of the wheel-type distance measuring instrument (4); The moving mechanism is configured to adjust the horizontal position of the support mechanism (2) on the base (1) and the horizontal position of the lifting mechanism (10) on the support mechanism (2) respectively, so as to adjust the horizontal position of the disc measuring mechanism (3); The lifting mechanism (10) is configured to adjust the height of the disc measuring mechanism (3) on the support mechanism (2); The power unit provides power for the movement of the support mechanism (2), the movement of the lifting mechanism (10), and the height adjustment of the disc measuring mechanism (3); It also includes a controller, which is configured to control the power unit to start or stop working and move the disc measuring mechanism (3) to a preset position; the controller is also configured to control the disc measuring mechanism (3) to start or stop measuring; the controller is also configured to process the measurement data of the disc measuring mechanism (3) and output the processing result to the display terminal; the controller is also configured to input and process the parameters of the measuring wheel (41) and adjust the moving position of the disc measuring mechanism (3) according to the processing result; The disc measuring mechanism (3) includes a measuring disc (31) and a three-jaw support (32). The bottom of the three-jaw support (32) is connected to the measuring disc (31), and the top of the three-jaw support (32) is connected to the lifting mechanism (10). The measuring disk (31) has a disc-shaped structure and includes a bottom wall (311) and a side wall (312). One or more pairs of first sensors (12) are evenly arranged on the side wall (312). Each pair has two first sensors. The two first sensors of each pair are respectively arranged at both ends of the diameter of the side wall (312). The two first sensors are coaxial and the sensor heads of the two first sensors are arranged opposite each other. The axis of the two first sensors of each pair is parallel to the bottom wall (311) of the measuring disk. Each first sensor (12) is installed in the sensor mounting hole on the side wall (312). A second through hole (3111) is axially provided at the center of the bottom wall (311), and a force-applying mechanism (14) is coaxially provided in the second through hole (3111); a third through hole (3112) is also radially provided on the bottom wall (311), and the third through hole (3112) is separated from the second through hole (3111) by a certain distance; a second sensor (13) is provided in the third through hole (3112), and the second sensor (13) can slide in the third through hole (3112).

2. The wheel rangefinder calibration device according to claim 1, characterized in that, The force-applying mechanism (14) includes a force-applying module (14a). A force sensor (14b) for measuring the magnitude of the applied force is coaxially arranged at the bottom of the force-applying module (14a). A contact module (14c) is coaxially arranged at the bottom of the force sensor (14b). The contact module (14c) is close to the rotation center of the measuring wheel (41) to be measured.

3. The wheel rangefinder calibration device according to claim 1, characterized in that, The support mechanism (2) includes two parallel first columns (21) and second columns (22), and also includes a crossbeam (23). The first columns (21), second columns (22) and crossbeam (23) form an inverted U-shaped structure. The lifting mechanism (10) is mounted on the crossbeam (23). The lifting mechanism (10) includes a lifting rod (10a), a fixing plate (10b), and a sleeve (10c). The bottom of the lifting rod (10a) is connected to the three-claw support (32). The fixing plate (10b) is mounted on the top of the crossbeam (23). The width of the fixing plate (10b) is greater than the width of the crossbeam (23). Along the width direction of the crossbeam (23), one or both ends of the fixing plate (10b) extend out of the crossbeam (23), and the surface of the fixing plate (10b) extending out of the crossbeam (23) is provided with lifting holes, and the axis of the lifting holes is a certain distance away from the surface of the crossbeam (23). The sleeve (10c) is coaxially provided with an installation hole that matches the lifting rod (10a). The sleeve (10c) is coaxially provided at the lifting hole position of the fixed plate (10b). The lifting rod (10a) passes through both the fixed plate (10b) and the sleeve (10c).

4. The wheel rangefinder calibration device according to claim 3, characterized in that, The moving mechanism includes a first moving mechanism and a second moving mechanism. The first moving mechanism includes multiple sliders, multiple guide rails and a rack. The multiple sliders are evenly arranged at the bottom of the first column (21) and the second column (22). The guide rails are arranged at the top of the base (1) and the rack is arranged on the first side of the base (1). The second moving mechanism includes two guide rails and a rack. The two guide rails are arranged parallel to each other on the top of the crossbeam (23), the rack is arranged on the inner side of one of the guide rails, and multiple sliders are arranged parallel to each other on the bottom of the fixed plate (10b).

5. The wheel rangefinder calibration device according to claim 4, characterized in that, The power unit includes a first motor (211), a second motor (10e), and a third motor (11). The first motor (211) is connected to a first gear (212), which meshes with the rack of the first moving mechanism. The second motor (10e) is connected to a second gear (10f), which meshes with the rack on the lifting rod (10a). The third motor (11) is connected to a third gear (11a), which meshes with the rack of the second moving mechanism.

6. The wheel rangefinder calibration device according to any one of claims 1 to 5, characterized in that, The base (1) is provided with a clamping device (5) for clamping and fixing the wheel rangefinder (4). The clamping device (5) includes a first side plate (51) and a second side plate (52). The first side plate (51) and the second side plate (52) are arranged opposite to each other. The first side plate (51) is fixed on the base (1), and the second side plate (52) is slidably arranged on the base (1). A lead screw (54) is provided on the outer side surface of the second side plate (52), and a lead screw nut (55) that cooperates with the lead screw (54) is provided on the base (1). The lead screw nut (55) is separated from the second side plate (52) by a certain distance. One or more clamping components (53) are respectively provided on the inner side surfaces of the first side plate (51) and the second side plate (52). The clamping components on the first side plate (51) and the clamping components on the second side plate (52) are arranged opposite to each other. The clamping components (53) are fixedly or slidably connected to the first side plate (51) and the second side plate (52).

7. The wheel rangefinder calibration device according to claim 6, characterized in that, The clamping component (53) includes a fixing component (531) and a clamping component (532). The fixing component (531) includes a fixing block. The fixing block has a mounting through hole in the middle. The fixing block has connecting blocks at both ends. The connecting blocks are perpendicular to the fixing block. The two connecting blocks and the fixing block form a U-shaped structure. The two ends of the clamping member (532) are respectively connected to the connecting block, and the clamping member (532) can rotate around the connecting shaft.

8. The wheel rangefinder calibration device according to claim 6, characterized in that, A height adjustment device (6) for adjusting the installation height of the wheel-type rangefinder (4) is provided between the first side plate (51) and the second side plate (52); the height adjustment device (6) includes a height adjustment screw (61) and a height adjustment sleeve (62), the height adjustment sleeve (62) and the height adjustment screw (61) are configured to cooperate, the bottom of the height adjustment screw (61) is connected to the base (1) and the top is connected to the height adjustment sleeve (62), the top of the height adjustment sleeve (62) is connected to the measuring wheel host (42); the bottom of the height adjustment screw (61) is coaxially provided with an installation groove (610), and a magnet (63) adapted to the installation groove is provided in the installation groove (610).

9. A calibration method for a wheel-type rangefinder, characterized in that, The calibration is performed using the wheel-type rangefinder calibration device as described in any one of claims 1 to 8.

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