Calibration equipment and calibration method of torque sensor

Abstract

The present invention relates to a calibration device and a calibration method for a torque sensor. The calibration device comprises a base, a support base, a calibration arm, a plurality of serial toolings, and a slide. The support base is arranged on the base. The calibration arm is rotatably connected to the support base through a rotating shaft. Each serial tooling is used to connect two adjacent torque sensors, and each torque sensor is connected to each serial tooling to form a rigid serial body. The slide can be slidably arranged on the base. A stop shaft is provided on the slide, and the stop shaft is coaxially arranged with the rotating shaft. The two ends of the rigid serial body are respectively connected to the rotating shaft and the stop shaft through a first connecting component and a second connecting component. The calibration device uses the serial tooling to connect a plurality of torque sensors to be calibrated into one, so that the plurality of torque sensors can be calibrated simultaneously, which greatly improves the calibration efficiency. In addition, by rigidly connecting a plurality of torque sensors and performing pressurized calibration, the uniformity of the process can be increased.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor calibration, and in particular to a calibration device and a calibration method for a torque sensor. Background Art

[0002] Torque sensors are precision instruments that are widely used in mechanical engineering, manufacturing, and the automotive industry to measure the torque of rotating systems. Since the measurement accuracy of torque sensors directly affects the optimization of system performance and safe operation, torque sensors usually need to be calibrated.

[0003] Currently, the calibration method for torque sensors is usually to use calibration instruments such as standard torque generators. These instruments generally have problems such as high cost, short service life, high equipment accuracy requirements and long calibration time. Summary of the invention

[0004] One object of the present invention is to solve the deficiencies in the prior art and provide a torque sensor calibration device with a simple structure and high calibration efficiency. To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A torque sensor calibration device, used for calibrating multiple torque sensors simultaneously, comprising:

[0006] Base;

[0007] A support seat, which is arranged on the base;

[0008] A calibration arm, which is rotatably connected to the support seat through a rotating shaft, and the calibration arm is used to apply torque to each torque sensor;

[0009] A series connection tooling, each series connection tooling is used to connect two adjacent torque sensors, and each torque sensor is connected to each series connection tooling to form a rigid series body;

[0010] The slide seat is slidably arranged on the base, the slide seat is arranged opposite to the support seat, a stop shaft is arranged on the slide seat, the stop shaft is coaxially arranged with the rotating shaft, and the two ends of the rigid series body are respectively connected to the rotating shaft and the stop shaft through the first connecting component and the second connecting component.

[0011] In one embodiment, each torque sensor includes an outer ring body and an inner ring body that are integrally connected, and between two adjacent torque sensors, the outer ring body of one torque sensor is connected to the inner ring body of the other torque sensor through a series tooling.

[0012] In one embodiment, the tandem tooling includes a connected tandem shaft and a tandem flange, the end of the tandem shaft away from the tandem flange is used to be fixedly connected to the inner ring body, and the end of the tandem flange away from the tandem shaft is used to be fixedly connected to the outer ring body.

[0013] In one embodiment, two ends of the rigid series body are respectively provided with two torque sensors, the first connecting component is used to connect the torque sensor and the rotating shaft, and the second connecting component is used to connect the torque sensor and the stop shaft.

[0014] In one embodiment, the first connecting assembly includes a first coupling and a first connecting shaft, the first connecting shaft is provided with a shaft portion and a flange portion integrally connected, the flange portion is used to be connected to the outer ring body of the torque sensor, and the first coupling is used to connect the shaft portion and the rotating shaft;

[0015] The second connecting assembly includes a second coupling and a second connecting shaft. The second connecting shaft is used to be connected to the inner ring body of the torque sensor. The second coupling is used to connect the second connecting shaft and the stop shaft.

[0016] In one embodiment, two ends of the rigid serial body are respectively provided with two serial toolings, the first connecting component is used to connect the serial toolings and the rotating shaft, and the second connecting component is used to connect the serial toolings and the stop shaft.

[0017] In one embodiment, the two ends of the rigid serial body are respectively a torque sensor and a serial tooling, the first connecting component is used to connect the torque sensor and the rotating shaft, and the second connecting component is used to connect the serial tooling and the stop shaft.

[0018] In one of the embodiments, the calibration device of the torque sensor further includes a support assembly, which is slidably disposed on the base, and the support assembly is arranged between the support seat and the slide seat to support the rigid serial body.

[0019] In one embodiment, the support assembly includes a support bracket and a support bearing, the bottom of the support bracket is slidably connected to the base, the support bearing is fixed to the top of the support bracket, and the support bearing is used to pass through the rigid series body.

[0020] Another object of the present invention is to provide a calibration method for a torque sensor, which is implemented by using the calibration device for the torque sensor described in any one of the above items, and the calibration method comprises:

[0021] Connecting a predetermined number of torque sensors to be calibrated using a plurality of serial connection fixtures to form a rigid serial body;

[0022] Connect the two ends of the rigid series body to the rotating shaft and the stop shaft respectively;

[0023] Leveling and calibration arm;

[0024] Applying a predetermined torque to the calibration arm and obtaining output values ​​of each torque sensor;

[0025] Calibrate each torque sensor based on the torque value and output value.

[0026] In one embodiment, the torque sensor is fixed to the tandem tooling by bolts;

[0027] The step of connecting a predetermined number of torque sensors to be calibrated using a plurality of serial fixtures specifically includes:

[0028] First, pre-connect each torque sensor with each serial fixture with the same bolt pre-tightening force;

[0029] Then, each torque sensor is connected and fixed to each serial tooling with the same bolt tightening force.

[0030] In one embodiment, the calibration method of the torque sensor further includes:

[0031] A constant temperature box is provided, and the rigid series body of the calibration equipment is placed in the constant temperature box as a whole. By setting the temperature in the constant temperature box, each torque sensor can be calibrated at different temperatures.

[0032] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0033] In the present invention, the calibration device includes a base, a support seat, a calibration arm, a slide seat and a serial tooling, and the overall structure is simple and easy to implement. At the same time, the serial tooling can be used to connect multiple torque sensors to be calibrated into one, so that the calibration device can calibrate multiple torque sensors at the same time, greatly improving the calibration efficiency. In addition, by rigidly connecting multiple torque sensors and performing pressurized calibration, the process uniformity can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic structural diagram of a calibration device for a torque sensor according to an embodiment.

[0035] Figure 2 yes Figure 1 A schematic diagram of the partial structural breakdown of the calibration equipment shown.

[0036] Figure 3 yes Figure 2 An enlarged schematic diagram of point A in the structure shown.

[0037] Figure 4 yes Figure 1 Front view of the calibration equipment shown.

[0038] Figure 5 4 is a flow chart of a method for calibrating a torque sensor according to an embodiment.

[0039] The following are the descriptions of the reference numerals:

[0040] 10-torque sensor; 101-outer ring body; 102-inner ring body;

[0041] 100-base; 110-sliding track;

[0042] 200-support seat; 210-connection block;

[0043] 300-calibration arm; 310-rotating shaft;

[0044] 400-tandem tooling; 410-tandem shaft; 420-tandem flange;

[0045] 500-slide seat; 510-stop shaft;

[0046] 600-first connecting assembly; 610-first coupling; 620-first connecting shaft;

[0047] 700 - second connecting assembly; 710 - second coupling; 720 - second connecting shaft;

[0048] 800-support assembly; 810-support bracket; 820-support bearing. DETAILED DESCRIPTION

[0049] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0050] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] See also Figure 1 and Figure 2As shown, the calibration device of the torque sensor according to the embodiment of the present invention is used to calibrate multiple torque sensors 10 simultaneously. It includes a base 100, a support base 200, a calibration arm 300, a plurality of serial fixtures 400, and a slide 500. The support base 200 is arranged on the base 100. The calibration arm 300 is rotatably connected to the support base 200 through a rotating shaft 310, and the calibration arm 300 is used to apply torque to each torque sensor 10.

[0053] Each serial jig 400 is used to connect two adjacent torque sensors 10, and each torque sensor 10 is connected to each serial jig 400 to form a rigid serial body. The slide 500 is slidably arranged on the base 100, and the slide 500 is arranged opposite to the support base 200. The slide 500 is provided with a stop shaft 510, and the stop shaft 510 is coaxially arranged with the rotating shaft 310. The two ends of the rigid serial body are connected to the rotating shaft 310 and the stop shaft 510 through the first connecting component 600 and the second connecting component 700, respectively.

[0054] The calibration device of the torque sensor of the embodiment of the present invention comprises a base 100, a support base 200, a calibration arm 300, a slide 500 and a serial fixture 400, and the overall structure is simple and easy to implement. In the calibration device, the serial fixture 400 can be used to connect multiple torque sensors 10 to be calibrated into one body, so that the calibration device can calibrate multiple torque sensors 10 at the same time, greatly improving the calibration efficiency.

[0055] Furthermore, by rigidly connecting a plurality of torque sensors 10 and performing pressure calibration, the uniformity of the process can be increased. That is, after one calibration, the input and output performances of the torque sensors 10 in the batch can be made consistent.

[0056] In the present application, the base 100 is used to support the components disposed thereon. The base 100 can be placed firmly for easy use. Figure 1 As shown, the base 100 may include a main body that is substantially in the shape of a rectangular parallelepiped, and a foot connected to the lower side of the main body.

[0057] In one embodiment, a sliding track 110 may be provided on the base 100. The sliding track 110 may be two, and the two sliding tracks 110 are arranged in parallel and spaced apart. By providing the sliding track 110, the sliding seat 500 and the supporting assembly 800 described below can be slidably connected to the base 100. This makes the overall structure of the calibration device simple and easy to adjust.

[0058] See also Figure 2The support base 200 is fixed on the base 100 and is located at one end of the sliding track 110. The support base 200 is used to support the calibration arm 300. The calibration arm 300 is used to apply torque to each torque sensor 10. The calibration arm 300 can be rotatably connected to the support base 200 through the rotating shaft 310. For example, Figure 2 As shown, a rotation hole may be provided in the middle of the calibration force arm 300 , and the rotation shaft 310 is passed through the rotation hole and fixedly connected to the calibration force arm 300 .

[0059] like Figure 2 As shown, two connection blocks 210 may be protruded upwards from the top of the support seat 200, and the two connection blocks 210 are arranged opposite to each other at intervals. The two connection blocks 210 are respectively provided with connection holes, and the two ends of the rotating shaft 310 are respectively inserted into the two connection holes.

[0060] Furthermore, bearings are provided in the two connection holes. The rotating shaft 310 is rotatably connected to the top of the supporting seat 200 via the bearings.

[0061] In other embodiments, the rotating shaft 310 may also be integrally formed with the calibration arm 300 .

[0062] In the embodiment of the present application, both ends of the calibration arm 300 can be used to load weights or other heavy objects. Loading weights can generate tension on the ends of the calibration arm 300, so that the calibration arm 300 can apply torque to each torque sensor 10.

[0063] By connecting the rotating shaft 310 to the middle of the calibration arm 300, and allowing both ends of the calibration arm 300 to be used to load weights to apply torque to the torque sensor 10, the user can choose any end of the calibration arm 300 to apply force during calibration, thereby making it more convenient to use the calibration equipment.

[0064] In other embodiments, the calibration arm 300 may have one end connected to the rotating shaft 310 and the other end used for loading weights.

[0065] In the embodiment of the present application, the torque applied by the calibration lever arm 300 to the torque sensor 10 is determined by the lever arm of the calibration lever arm 300 and the force generated by the weight on the calibration lever arm 300. The lever arm of the calibration lever arm 300 is the distance from one end of the calibration lever arm 300 to the rotation center of the calibration lever arm 300.

[0066] See also Figure 1 The slide seat 500 is slidably disposed on the base 100. For example, a slider that slidably cooperates with the slide rail 110 may be disposed at the bottom of the slide seat 500. The sliders may be arranged in two groups. Each group may have two sliders. The two groups of sliders are slidably connected to the two slide rails 110, respectively.

[0067] The slide 500 is arranged opposite to the support 200, and an installation space for installing multiple torque sensors 10 and multiple serial fixtures 400 can be formed between the slide 500 and the support 200. Since the slide 500 can slide along the sliding track 110, the size of the installation space between the slide 500 and the support 200 is adjustable, that is, the installation space can be suitable for installing different numbers of torque sensors 10 and serial fixtures 400. Therefore, the calibration device can be suitable for calibrating any required number of torque sensors 10 at one time.

[0068] like Figure 2 As shown, a stopper shaft 510 is provided on the slide 500. The stopper shaft 510 is used to keep a part of the torque sensor 10 fixed during the calibration process.

[0069] In the embodiment of the present application, the stop shaft 510 may be a rotatable shaft, which only remains stationary during the calibration process to achieve the purpose of partially fixing the torque sensor 10. For example, a rotating component is provided on the slide 500, and the stop shaft 510 is the output shaft of the rotating component. The rotating component may be an electric rotating component such as a motor. Alternatively, the rotating component may also be a manual rotating component including a hand wheel and a gear set, and the hand wheel is connected to the stop shaft 510 through the gear set.

[0070] It is understood that in other embodiments, the stop shaft 510 may also be a fixed shaft. That is, the stop shaft 510 is always non-rotatable. For example, a fixed bracket is provided on the slide 500, and the stop shaft 510 is fixedly provided on the fixed bracket.

[0071] See also Figure 3 In the embodiment of the present application, the torque sensor 10 has a flat shape. It can be suitable for installation at the joint of the robot to detect the torque at the joint of the robot in real time. Figure 3 As shown, in one embodiment, each torque sensor 10 includes an outer ring body 101 and an inner ring body 102 that are integrally connected. The outer ring body 101 and the inner ring body 102 are coaxially arranged.

[0072] It should be noted that one of the outer ring body 101 and the inner ring body 102 of the torque sensor 10 is used as a fixed end, and the other is used as a loading end, and the portion between the two is a strain portion. A strain gauge is correspondingly provided on the strain portion. When torque is applied to the torque sensor 10, the loading end is twisted relative to the fixed end, causing the strain portion to deform. Thus, the strain gauge can sense the deformation and output a corresponding value.

[0073] like Figure 1As shown, the calibration arm 300 applies torque to each torque sensor 10 through the rotating shaft 310. Specifically, the torque is applied to the loading end of the torque sensor 10. For example, in this embodiment, the loading end can be the outer ring body 101.

[0074] Correspondingly, the stopper shaft 510 on the slide 500 is used to keep the fixed end of each torque sensor 10 stationary during the calibration process. For example, in this embodiment, the fixed end can be the inner ring body 102.

[0075] In the present application, the calibration device can be used to simultaneously calibrate a plurality of torque sensors 10. Specifically, a serial connection fixture 400 is used to connect two adjacent torque sensors 10.

[0076] See also Figure 3 and Figure 4 As shown, between two adjacent torque sensors 10 , the outer ring body 101 of one torque sensor 10 is connected to the inner ring body 102 of the other torque sensor 10 via a serial fixture 400 .

[0077] See also Figure 3 In one embodiment, the tandem tooling 400 includes a connected tandem shaft 410 and a tandem flange 420, wherein the end of the tandem shaft 410 away from the tandem flange 420 is used to be fixedly connected to the inner ring body 102, and the end of the tandem flange 420 away from the tandem shaft 410 is used to be fixedly connected to the outer ring body 101.

[0078] Specifically, bolt holes are provided on the tandem shaft 410 and the inner ring body 102 respectively. The user can fix the tandem shaft 410 and the inner ring body 102 by bolts. For example, the inner ring body 102 can be provided with a plurality of bolt holes evenly distributed along the circumference; correspondingly, the end of the tandem shaft 410 can also be provided with a plurality of bolt holes evenly distributed along the circumference. The evenly arranged bolt holes can help improve the uniformity of the connection between the tandem shaft 410 and the inner ring body 102 in the circumferential direction.

[0079] Bolt holes are provided on the series flange 420 and the outer ring body 101 respectively. The user can fix the series flange 420 and the outer ring body 101 together by bolts. For example, the outer ring body 101 can be provided with a plurality of bolt holes evenly distributed along the circumference; correspondingly, the series flange 420 can also be provided with a plurality of bolt holes evenly distributed along the circumference. The evenly arranged bolt holes can help improve the uniformity of the connection between the series flange 420 and the outer ring body 101 in the circumferential direction.

[0080] In the present application, multiple torque sensors 10 are fixedly connected through multiple serial fixtures 400 to form a whole, that is, a rigid serial body. Then, the two ends of the rigid serial body are connected to the rotating shaft 310 and the stop shaft 510 respectively.

[0081] In an embodiment of the present application, after a plurality of torque sensors 10 and a plurality of series fixtures 400 are alternately connected to form a rigid series body, both ends of the rigid series body may be torque sensors; or, both ends of the rigid series body may be series fixtures 400; or, one end of the rigid series body may be a torque sensor 10 and the other end may be a series fixture 400.

[0082] See also Figure 2 and Figure 4 As shown, in one embodiment, two ends of the rigid series body are respectively connected to two torque sensors 10. The first connecting assembly 600 is used to connect the torque sensor 10 and the rotating shaft 310, and the second connecting assembly 700 is used to connect the torque sensor 10 and the stop shaft 510.

[0083] Combination Figure 3 As shown, in one embodiment, the first connecting assembly 600 includes a first coupling 610 and a first connecting shaft 620, the first connecting shaft 620 is provided with an integrally connected shaft portion and a flange portion, the flange portion is used to be connected to the outer ring body 101 of the torque sensor 10, and the first coupling 610 is used to connect the shaft portion and the rotating shaft 310.

[0084] The second connecting assembly 700 includes a second coupling 710 and a second connecting shaft 720 . The second connecting shaft 720 is used to be connected to the inner ring body 102 of the torque sensor 10 . The second coupling 710 is used to connect the second connecting shaft 720 and the stop shaft 510 .

[0085] It can be understood that in other embodiments, the two ends of the rigid serial body can be two serial fixtures 400. The first connecting assembly 600 is used to connect the serial fixture 400 and the rotating shaft 310, and the second connecting assembly 700 is used to connect the serial fixture 400 and the stop shaft 510.

[0086] In this embodiment, the structural form of the first connecting assembly 600 and the second connecting assembly 700 can be deformed according to actual needs. Exemplarily, when the tandem tooling 400 is connected to the rotating shaft 310 or the stop shaft 510 through the tandem shaft 410, the first connecting assembly 600 and the second connecting assembly 700 can be a coupling. When the tandem tooling 400 is connected to the rotating shaft 310 or the stop shaft 510 through the tandem flange 420, the first connecting assembly 600 and the second connecting assembly 700 can be a structure including a coupling and a connecting shaft. Among them, the connecting shaft may include a shaft portion and a flange portion, wherein the flange portion is used to connect to the tandem flange 420, and the coupling connects the shaft portion to the rotating shaft 310 / stop shaft 510.

[0087] Alternatively, in other embodiments, the two ends of the rigid serial body may be a torque sensor 10 and a serial fixture 400, respectively. The first connecting assembly 600 is used to connect the torque sensor 10 and the rotating shaft 310, and the second connecting assembly 700 is used to connect the serial fixture 400 and the stop shaft 510. In this embodiment, the structural form of the first connecting assembly 600 and the second connecting assembly 700 can be deformed according to actual needs, and the specific structure can refer to the first connecting assembly 600 and the second connecting assembly 700 mentioned above.

[0088] See also Figure 1 As shown, in one embodiment, the calibration device of the torque sensor further includes a support assembly 800, which is slidably disposed on the base 100. The support assembly 800 is arranged between the support seat 200 and the slide seat 500 to support the rigid serial body. In this embodiment, by providing the support assembly 800, the rigid serial body can be supported to avoid the situation where the middle part of the rigid serial body is prone to collapse due to the excessive length of the rigid serial body, and effectively ensure the overall consistency of the rigid serial body.

[0089] See also Figure 3 Exemplarily, the support assembly 800 includes a support bracket 810 and a support bearing 820, the bottom of the support bracket 810 is slidably connected to the base 100, and the support bearing 820 is fixed to the top of the support bracket 810, and the support bearing 820 is used to pass through the rigid series body.

[0090] The bottom of the support bracket 810 may be provided with a slider for slidingly cooperating with the sliding track 110. The top of the support bracket 810 may be provided with a mounting groove for mounting the support bearing 820. The support bearing 820 is fixedly mounted in the mounting groove.

[0091] like Figure 1 As shown, since the rigid serial body is formed by connecting a predetermined number of torque sensors 10 through a plurality of serial fixtures 400, the support bearing 820 is mainly sleeved outside one of the serial fixtures 400 of the rigid serial body to support the entire rigid serial body. More specifically, the support bearing 820 is sleeved outside the serial shaft 410 of the serial fixture 400 in the middle of the rigid serial body.

[0092] See also Figure 5 Another object of the present invention is to provide a calibration method for a torque sensor, which is implemented by using the calibration device for the torque sensor described in any one of the above.

[0093] The calibration method comprises:

[0094] Step S10: Connect a predetermined number of torque sensors 10 to be calibrated by using a serial connection tool 400 to form a rigid serial body.

[0095] The torque sensor 10 and the tandem fixture 400 may be fixed by bolts.

[0096] In one embodiment, step S10 specifically includes: firstly pre-connecting each torque sensor 10 with each serial tooling 400 with the same bolt pre-tightening force.

[0097] Then, each torque sensor 10 is connected and fixed to each serial fixture 400 with the same bolt tightening force. By connecting each torque sensor 10 to each serial fixture 400 with the same bolt pre-tightening force and bolt tightening force, the consistency and coaxiality of the connection between each torque sensor 10 and each serial fixture 400 can be effectively guaranteed, which is conducive to ensuring the accuracy of the calibration of each torque sensor 10.

[0098] Step S20: Connecting the two ends of the rigid serial body to the rotating shaft 310 and the stop shaft 510 respectively. In this step, the two ends of the rigid serial body can be connected to the rotating shaft 310 and the stop shaft 510 respectively through the first connecting assembly 600 and the second connecting assembly 700.

[0099] Step S30: Leveling the calibration arm 300. In this step, a specific leveling method may be to install the rigid serial body between the rotating shaft 310 and the stop shaft 510, and then rotate the hand wheel to make the stop shaft 510 drive the rotating shaft 310 to rotate, thereby driving the calibration arm 300 to rotate, so as to achieve leveling of the calibration arm 300. The method for determining whether the calibration arm 300 is leveled may be to measure using a level.

[0100] Step S40: a predetermined torque is applied to the calibration arm 300, and the output value of each torque sensor 10 is obtained. In this step, a predetermined number of weights may be hung at one end of the calibration arm 300 to apply a tensile force to the end of the calibration arm 300. Thus, the calibration arm 300 may apply a predetermined torque to each torque sensor 10.

[0101] For example, first, no weight may be hung on the end of the calibration arm 300. At this time, the torque applied by the calibration arm 300 to each torque sensor 10 is 0 N·m. The output value of the current torque sensor 10 is obtained.

[0102] Afterwards, a predetermined number of weights are hung at the end of the calibration arm 300. At this time, the torque applied by the calibration arm 300 to each torque sensor 10 is 200 N·m. The current output value of the torque sensor 10 is obtained.

[0103] Of course, the calibration arm 300 may also apply a torque of any value between 0 N·m and 200 N·m to each torque sensor 10 , and obtain the output value of the torque sensor 10 .

[0104] Step S50: Calibrate each torque sensor 10 according to the torque value and the output value.

[0105] In a possible implementation of the present application, the calibration method of the torque sensor 10 further includes:

[0106] A constant temperature box is provided, so that the rigid series body of the calibration equipment is placed in the constant temperature box as a whole. By setting the temperature in the constant temperature box, each torque sensor 10 can be calibrated at different temperatures.

[0107] For example, the rigid series of calibration equipment is placed in a thermostat as a whole. The thermostat is operated to 25°C. When the temperature reaches 25°C, it needs to be kept constant for one hour before calibration to ensure that the temperature of each component in the thermostat reaches 25°C.

[0108] Then, steps S40 and S50 may be repeated to calibrate each torque sensor 10 at a temperature of 25° C.

[0109] Furthermore, the thermostat may be adjusted to 0° C. and 85° C., and steps S40 and S50 may be repeated to calibrate each torque sensor 10 at the temperature conditions of 0° C. and 85° C.

[0110] It can be understood that, based on similar principles, the thermostat can also be replaced by other functional boxes to simulate other environmental conditions. For example, the thermostat can be replaced by a sealed box, and the rigid series body of the calibration device can be placed in the sealed box as a whole. By setting the humidity in the sealed box, each torque sensor 10 can be calibrated under different humidity conditions.

[0111] The calibration device and calibration method of the torque sensor of the present application are designed based on the lever principle and have a simple overall structure. The calibration device and calibration method of the torque sensor of the present application can calibrate multiple torque sensors 10 in series, effectively solving the problems of the existing torque generators being expensive, the short service life of the precision equipment, and the long calibration time.

[0112] The calibration equipment and calibration method of the torque sensor of the present application connects multiple torque sensors 10 into one by means of a serial tooling 400, and can simultaneously apply equal torque to multiple torque sensors 10 through a calibration arm 300, thereby greatly reducing the time for calibrating multiple temperatures and multiple pressures of a single torque sensor 10 and greatly improving the calibration efficiency.

[0113] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.

[0114] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A torque sensor calibration device, used for calibrating multiple torque sensors simultaneously, characterized in that: include: Base; A support seat, which is arranged on the base; A calibration arm, which is rotatably connected to the support seat via a rotating shaft, and the calibration arm is used to apply torque to each of the torque sensors; A plurality of serial toolings, each of which is used to connect two adjacent torque sensors, and each of the torque sensors is connected to each of the serial toolings to form a rigid serial body; A slide seat, which is slidably arranged on the base, the slide seat is arranged opposite to the support seat, and a stop shaft is provided on the slide seat, the stop shaft is coaxially arranged with the rotating shaft, and the two ends of the rigid serial body are respectively connected to the rotating shaft and the stop shaft through a first connecting component and a second connecting component; each of the torque sensors includes an outer ring body and an inner ring body that are integrally connected, and between two adjacent torque sensors, the outer ring body of one of the torque sensors is connected to the inner ring body of the other torque sensor through the serial tooling; the serial tooling includes a connected serial shaft and a serial flange, the end of the serial shaft away from the serial flange is used to be fixedly connected to the inner ring body, and the end of the serial flange away from the serial shaft is used to be fixedly connected to the outer ring body.

2. The torque sensor calibration device according to claim 1, characterized in that: The two ends of the rigid series body are respectively provided with two torque sensors, the first connecting component is used to connect the torque sensor and the rotating shaft, and the second connecting component is used to connect the torque sensor and the stop shaft.

3. The torque sensor calibration device according to claim 2, characterized in that: The first connecting assembly includes a first coupling and a first connecting shaft, the first connecting shaft is provided with a shaft portion and a flange portion connected in one piece, the flange portion is used to be connected to the outer ring body of the torque sensor, and the first coupling is used to connect the shaft portion and the rotating shaft; The second connecting assembly includes a second coupling and a second connecting shaft, the second connecting shaft is used to be connected to the inner ring body of the torque sensor, and the second coupling is used to connect the second connecting shaft and the stop shaft.

4. The torque sensor calibration device according to claim 1, characterized in that: The two ends of the rigid serial body are respectively provided with two serial toolings, the first connecting assembly is used to connect the serial tooling and the rotating shaft, and the second connecting assembly is used to connect the serial tooling and the stop shaft.

5. The torque sensor calibration device according to claim 1, characterized in that: The two ends of the rigid serial body are respectively provided with a torque sensor and a serial tooling, the first connecting component is used to connect the torque sensor and the rotating shaft, and the second connecting component is used to connect the serial tooling and the stop shaft.

6. The torque sensor calibration device according to claim 1, characterized in that: It also includes a support component which is slidably disposed on the base. The support component is arranged between the support seat and the slide seat to support the rigid serial body.

7. The torque sensor calibration device according to claim 6, characterized in that: The support assembly includes a support bracket and a support bearing. The bottom of the support bracket is slidably connected to the base. The support bearing is fixed on the top of the support bracket. The support bearing is used to pass through the rigid serial body.

8. A method for calibrating a torque sensor, characterized in that: The calibration method is implemented by using the calibration device of the torque sensor according to any one of claims 1 to 7, and the calibration method comprises: Connecting a predetermined number of the torque sensors to be calibrated by using a plurality of the series connection fixtures to form the rigid series body; Connecting the two ends of the rigid series body to the rotating shaft and the stop shaft respectively; Leveling the calibration arm; Applying a predetermined torque to the calibration arm, and obtaining output values ​​of each torque sensor; Each of the torque sensors is calibrated according to the torque value and the output value.

9. The method for calibrating a torque sensor according to claim 8, characterized in that: The torque sensor and the tandem tooling are fixed with bolts; The step of connecting a predetermined number of the torque sensors to be calibrated by using a plurality of the series fixtures specifically comprises: First, pre-connect each of the torque sensors with each of the series fixtures with the same bolt pre-tightening force; Then, each of the torque sensors is connected and fixed to each of the serial fixtures with the same bolt tightening force.

10. The method for calibrating a torque sensor according to claim 8, characterized in that: Also includes: A constant temperature box is provided, so that the rigid series body of the calibration equipment is placed in the constant temperature box as a whole. By setting the temperature in the constant temperature box, each torque sensor can be calibrated at different temperatures.

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