A photoelectric torque sensor detection device and system

Abstract

The present invention relates to a photoelectric torque sensor detection device and system, including: a flexible rod, which can be elastically deformed; a driving rod, which can rotate; a detection component, a first limiter connected to the driving rod, a second limiter connected to the flexible rod, the first limiter including a first convex block, the second limiter including a second convex block, the first limiter can drive the second limiter to rotate, the first convex block is connected to a movable rod, the straight line where the movable rod is located is parallel to the axis of the driving rod, the second limiter is provided with a slide groove, the movable rod can extend into the slide groove, the side wall of the movable rod is provided with a groove, the bottom of the groove is provided with a conductive sheet, the side wall of the slide groove is connected with an elastic member, the end of the elastic member is connected with a conductive member, the conductive member can be inserted into the groove and abut against the conductive sheet, and the conductive member abuts against the conductive sheet for detecting torque. The present invention relates to a photoelectric torque sensor detection device and system, which can detect a photoelectric torque sensor, thereby avoiding affecting production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of sensor detection technology, and in particular to a photoelectric torque sensor detection device and system. Background Art

[0002] Photoelectric torque sensor is a device that uses the photoelectric effect to measure torque. Photoelectric torque sensor is widely used in mechanical systems, automobile manufacturing, aerospace and other fields to monitor and record the torque value generated by the equipment during operation to ensure the safety and reliability of the equipment. During use, the photoelectric torque sensor is subjected to large mechanical stress and vibration, which causes the parts of the photoelectric torque sensor to loosen, thereby affecting the accuracy of torque measurement. Since the photoelectric torque sensor does not have a detection function, the production equipment is prone to failure, thus affecting production efficiency. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a photoelectric torque sensor detection device and system, which can detect the photoelectric torque sensor to avoid affecting the production efficiency.

[0004] In order to solve the above technical problems, the present invention provides a photoelectric torque sensor detection device, including: a flexible rod, which can be elastically deformed; a driving rod, which can rotate; a detection component, including a first limiter and a second limiter, the first limiter is connected to the driving rod, and the second limiter is connected to the flexible rod, the first limiter includes at least one first protrusion, and the second limiter includes at least one second protrusion, and the first protrusion can be abutted against the second protrusion, so that the first limiter can drive the second limiter to rotate, the first protrusion is connected to a movable rod, the straight line where the movable rod is located is parallel to the axis of the driving rod, the second limiter is provided with a slide groove, the movable rod can extend into the slide groove, the side wall of the movable rod is provided with a groove, the bottom of the groove is provided with a conductive sheet, the side wall of the slide groove is connected with an elastic member, the end of the elastic member is connected with a conductive member, the conductive member can be inserted into the groove and abut against the conductive sheet, and the conductive member abuts against the conductive sheet for detecting torque.

[0005] In one embodiment of the present invention, a plurality of the first protrusions and the second protrusions are equidistantly arranged, the slide groove is located between two adjacent second protrusions, and the first protrusion is located between two adjacent second protrusions, and there is a gap between the first protrusion and the second protrusion.

[0006] In one embodiment of the present invention, the second protrusion is also connected to a movable rod, and the first limiting member is also provided with a sliding groove between two adjacent first protrusions.

[0007] In one embodiment of the present invention, a mounting groove is provided on the side wall of the slide groove, the elastic member is located in the mounting groove, and the conductive member can extend into the mounting groove.

[0008] In one embodiment of the present invention, a plurality of the grooves are provided, and the resistance of the plurality of the conductive sheets gradually changes in a direction away from the first bump.

[0009] In one embodiment of the present invention, a buffer is connected between the first protrusion and the second limiter, and a strain gauge is disposed inside the buffer.

[0010] In one embodiment of the present invention, one end of the movable rod away from the first protrusion is connected to a first magnetic attraction member, and the bottom of the sliding groove is connected to a second magnetic attraction member.

[0011] In one embodiment of the present invention, the diameter of the conductive member gradually decreases in a direction away from the elastic member.

[0012] The present invention also provides a photoelectric torque sensor detection system, comprising the above-mentioned photoelectric torque sensor detection device, and also comprising a driving member, the output end of the driving member is connected to the driving rod, the end of the flexible rod is provided with a connecting block, the diameter of the connecting block is larger than the diameter of the flexible rod, and the flexible rod is cooperatively connected with a photoelectric torque sensor.

[0013] In one embodiment of the present invention, the driving rod is connected to the first limiting member via a first connecting member, the connecting block is connected to the second limiting member via a second connecting member, and further comprises an actuator connected to the flexible rod.

[0014] The above technical solution of the present invention has the following advantages compared with the prior art:

[0015] The photoelectric torque sensor detection device and system described in the present invention detects the detection value of the photoelectric torque sensor through the cooperation of the movable rod and the elastic member, and the conductive member is inserted into the groove and abuts against the conductive sheet. The conductive member and the conductive sheet form a loop and generate current, thereby avoiding affecting the production efficiency. The secondary detection can be completed by setting the buffer and the strain gauge. The first protrusion is abutted against the second protrusion, and the first limiter and the second limiter form a mutually meshing structure, so that the clamping between the first protrusion and the second protrusion is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the assembly structure of a photoelectric torque sensor detection device of the present invention;

[0018] Figure 2 It is a schematic diagram of the assembly structure of the detection component;

[0019] Figure 3 yes Figure 2 A front view of

[0020] Figure 4 yes Figure 3 A partial cross-sectional view of the first protrusion and the second stopper at A in the middle;

[0021] Figure 5 yes Figure 4 A partial cross-sectional view of the first limiting member when it is away from the second limiting member.

[0022] Explanation of the reference numerals in the specification: 1. driving member; 2. detection component; 3. first connecting member; 4. flexible rod; 5. actuator; 11. driving rod; 21. first limiting member; 22. first protrusion; 23. second limiting member; 24. second protrusion; 25. movable rod; 26. second magnetic member; 27. buffer member; 28. conductive member; 29. ​​elastic member; 31. second connecting member; 41. photoelectric torque sensor; 42. connecting block; 51. rotating shaft; 231. slide groove; 232. first magnetic member; 251. groove; 252. conductive sheet. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0024] Reference Figures 1 to 4As shown, a photoelectric torque sensor detection device of the present invention includes: a flexible rod 4, which can be elastically deformed; a driving rod 11, which can rotate; a detection component 2, including a first limiter 21 and a second limiter 23, the first limiter 21 is connected to the driving rod 11, the second limiter 23 is connected to the flexible rod 4, the first limiter 21 includes at least one first protrusion 22, the second limiter 23 includes at least one second protrusion 24, the first protrusion 22 can be abutted against the second protrusion 24, so that the first limiter 21 can drive the second limiter 23 rotates, the first protrusion 22 is connected with a movable rod 25, the straight line where the movable rod 25 is located is parallel to the axis of the driving rod 11, the second limiting member 23 is provided with a slide groove 231, the movable rod 25 can extend into the slide groove 231, the side wall of the movable rod 25 is provided with a groove 251, the bottom of the groove 251 is provided with a conductive sheet 252, the side wall of the slide groove 231 is connected with an elastic member 29, the end of the elastic member 29 is connected with a conductive member 28, the conductive member 28 can be inserted into the groove 251 and abut against the conductive sheet 252, and the conductive member 28 abuts against the conductive sheet 252 for detecting torque.

[0025] A photoelectric torque sensor detection device of the present embodiment drives the first limit member 21 to rotate by driving the rod 11 to rotate, and the first protrusion 22 abuts against the second protrusion 24 so that the first limit member 21 drives the second limit member 23 to rotate, thereby causing the flexible rod 4 to twist and deform and change its length. At this time, the distance between the first limit member 21 and the second limit member 23 changes, and the position corresponding to the conductive sheet 252 is the calibrated torque value. The conductive member 28 is inserted into the groove 251 and abuts against the conductive sheet 252 to form a current loop. The detection of the photoelectric torque sensor 41 is completed by comparing the calibrated torque value with the output value of the photoelectric torque sensor 41, thereby avoiding affecting the production efficiency.

[0026] Reference Figure 1 As shown, the flexible rod 4 is made of a material that can be elastically deformed. The flexible rod 4 can produce torsional deformation after being subjected to torsion, and the length of the flexible rod 4 changes with the torsional deformation. Both ends of the flexible rod 4 are provided with connecting blocks 42, and the flexible rod 4 is fixedly connected to the connecting blocks 42, and the diameter of the connecting blocks 42 is greater than the diameter of the flexible rod 4. The diameter of the connection position between the connecting block 42 and the flexible rod 4 gradually decreases from the connecting block 42 to the flexible rod 4, thereby forming an inclined surface. The flexible rod 4 is used to be assembled and connected with the photoelectric torque sensor 41. When the flexible rod 4 produces torsional deformation after being subjected to torsion, the photoelectric torque sensor 41 is connected to the controller and can detect the corresponding torque.

[0027] The driving rod 11 is used to connect with the driving member 1, which is a rotating driving member. The output end of the driving member 1 is connected to the driving rod 11, and the driving member 1 can drive the driving rod 11 to rotate. The central axis of the driving rod 11 is collinear with the central axis of the flexible rod 4.

[0028] Reference Figures 2 to 5 As shown, the detection assembly 2 includes a first stopper 21 and a second stopper 23. The first stopper 21 is connected to the driving rod 11. Specifically, a first connecting column is provided at one end of the first stopper 21 away from the second stopper 23. The driving rod 11 is connected to the first connecting column of the first stopper 21 through a first connecting member 3. The first connecting member 3 can be regarded as a coupling. The second stopper 23 is connected to the flexible rod 4. Specifically, a second connecting column is provided at one end of the second stopper 23 away from the first stopper 21. The connecting block 42 of the flexible rod 4 is connected to the second stopper 23 through a second connecting member 31. The second connecting member 31 can be regarded as a coupling.

[0029] The first stopper 21 includes at least one first protrusion 22, and the second stopper 23 includes at least one second protrusion 24. The first protrusion 22 can abut against the second protrusion 24 in the circumferential direction. Specifically, the first protrusion 22 is located at one end of the first stopper 21 close to the second stopper 23, and the second protrusion 24 is located at one end of the second stopper 23 close to the first stopper 21. The distances between the first protrusion 22 and the second protrusion 24 and the central axis of the driving rod 11 are the same. The driving member 1 can drive the first stopper 21 to rotate through the driving rod 11. During the rotation of the first stopper 21, the first protrusion 22 moves along the circumferential direction of the first stopper 21 and can abut against the second protrusion 24, thereby driving the second stopper 23 to rotate. Preferably, the first protrusion 22 and the second protrusion 24 are both provided with a plurality of equidistant ones, and the first protrusion 22 and the second protrusion 24 are arranged in a staggered manner, that is, the first protrusion 22 is located between two adjacent second protrusions 24, and the second protrusion 24 is located between two adjacent first protrusions 22, so that the first stopper 21 and the second stopper 23 form a mutually meshing structure, thereby making the clamping connection between the first protrusion 22 and the second protrusion 24 more stable, avoiding the loose connection or failure caused by vibration, impact or long-term operation. Preferably, there is a gap between the first protrusion 22 and the second protrusion 24, so that lubricant can be injected between the first protrusion 22 and the second protrusion 24, thereby reducing the friction between the first protrusion 22 and the second protrusion 24 along the axial direction of the driving rod 11, and also facilitating the detection of torque with a small value. Specifically, the gap between the first protrusion 22 and the second protrusion 24 enables the first protrusion 22 to rotate clockwise or counterclockwise to 4.5°. Preferably, there are gaps between the first protrusion 22 and the second position-limiting member 23 and between the second protrusion 24 and the first position-limiting member 21 , so as to avoid wear between the first protrusion 22 and the second position-limiting member 23 and between the second protrusion 24 and the first position-limiting member 21 .

[0030] The end of the first protrusion 22 close to the second stopper 23 is connected with a movable rod 25, and the movable rod 25 extends in the direction close to the second stopper 23, and the straight line where the movable rod 25 is located is parallel to the axis of the driving rod 11. The second stopper 23 is provided with a slide groove 231, the diameter of the slide groove 231 is slightly larger than the diameter of the movable rod 25, the extension direction of the slide groove 231 is the same as that of the movable rod 25, and the positions of the slide groove 231 and the movable rod 25 correspond, and the movable rod 25 can extend into the slide groove 231. The slide groove 231 is located between two adjacent second protrusions 24. The side wall of the movable rod 25 is provided with a groove 251, and the bottom of the groove 251 is provided with a conductive sheet 252. The side wall of the slide groove 231 is connected with an elastic member 29, which can be regarded as a spring, and the end of the elastic member 29 is connected with a conductive member 28, which can be inserted into the groove 251 and abut against the conductive sheet 252, and the conductive member 28 abuts against the conductive sheet 252 for detecting torque. Specifically, the conductive sheet 252 and the conductive member 28 are both connected to the controller. The length of the flexible rod 4 changes after torsional deformation, thereby changing the distance between the first limit member 21 and the second limit member 23, and then causing the movable rod 25 and the slide groove 231 to move relative to each other. The position corresponding to the conductive sheet 252 is the calibrated torque value. After the conductive member 28 is inserted into the groove 251 and abuts against the conductive sheet 252, it can form a current loop with the controller and generate current, proving that the torque reaches the calibrated value. By comparing the calibrated value with the value of the photoelectric torque sensor 41 at this time, it is possible to detect whether the value of the photoelectric torque sensor 41 is accurate.

[0031] Preferably, the side wall of the slide groove 231 is provided with an installation groove, and the elastic member 29 is located in the installation groove. After the elastic member 29 is compressed, the conductive member 28 can extend into the installation groove, thereby avoiding the movable rod 25 from shaking in the slide groove 231 due to the excessive diameter of the slide groove 231, and also avoiding the influence of the conductive member 28 on the sliding of the movable rod 25 after the elastic member 29 is compressed.

[0032] Preferably, there may be multiple grooves 251 on the movable rod 25, and a conductive sheet 252 is provided at the bottom of each groove 251, and each conductive sheet 252 corresponds to a torque calibration value. The resistance of the multiple conductive sheets 252 gradually changes in the direction away from the first protrusion 22, that is, the resistance of the multiple conductive sheets 252 gradually increases or decreases in the direction away from the first protrusion 22, so that the current generated by the conductive member 28 and different resistances is different. The controller determines the torque calibration value at this time according to the difference in current, and then compares the torque calibration value at this time with the value of the photoelectric torque sensor 41 to detect whether the value of the photoelectric torque sensor 41 is accurate. By indirectly calculating the rotation angle through the change in the current value, the accuracy of the verification result can be further verified, thereby improving the accuracy and reliability of the torque measurement. The controller can be connected to the alarm component. When the difference between the value of the photoelectric torque sensor 41 and the torque calibration value exceeds the set range, the entire device stops working and the alarm component sounds an alarm.

[0033] Preferably, the diameter of the conductive member 28 gradually decreases in the direction away from the elastic member 29, that is, the conductive member 28 is cone-shaped as a whole, and the edge of the port of the groove 251 is provided with a guide slope, so that during the relative movement of the movable rod 25 and the slide groove 231, the resistance of the conductive member 28 in the movement process between the various grooves 251 is smaller, thereby increasing the service life of the elastic member 29 and making the torque detection more accurate.

[0034] Preferably, the second protrusion 24 is also connected to a movable rod 25, and a slide groove 231 is also provided on the first stopper 21 between two adjacent first protrusions 22. The structure and working principle of the movable rod 25 and the slide groove 231 are the same as those described above and will not be described in detail. The arrangement of the movable rod 25 on the second protrusion 24 and the slide groove 231 on the first stopper 21 enable the detection device to detect more times and reduce the probability of misjudgment.

[0035] In another embodiment, only one groove 251 is provided on the side wall of the movable rod 25, and the resistance of the conductive sheet 252 in the groove 251 gradually increases from one end to the other end. When the conductive member 28 is inserted into the groove 251, it can slide on the conductive sheet 252, so that the current between the conductive member 28 and the conductive sheet 252 changes continuously, thereby realizing stepless detection of torque.

[0036] A buffer 27 is connected between the first protrusion 22 and the second stopper 23. The buffer 27 is located at the edge of the movable rod 25 and the edge of the end of the slide slot 231. A strain gauge is provided in the buffer 27. Specifically, the buffer 27 can be made of polypropylene material with good flexibility and stretchability. When the first stopper 21 and the second stopper 23 move relative to each other, the buffer 27 can be compressed to fill the gap between the first protrusion 22 and the second stopper 23. The buffer 27 can also be stretched to buffer the movement of the first stopper 21 and the second stopper 23 to prevent the first stopper 21 and the second stopper 23 from being damaged due to rapid collision. The strain gauge is connected to the controller, and the strain gauge can sense the stretching and compression of the buffer 27. According to the stretching or compression of the buffer 27, the strain gauge can send the range value of the torque at this time through the controller, so as to serve as a torque reference at this time, that is, provide secondary detection.

[0037] One end of the movable rod 25 away from the first protrusion 22 is connected to the first magnetic component 232, and the bottom of the slide groove 231 is connected to the second magnetic component 26. The first magnetic component 232 is an electromagnet. The first magnetic component 232 can attract the second magnetic component 26, so that the relative movement of the movable rod 25 and the slide groove 231 is more stable, and the movement deviation of the movable rod 25 caused by vibration or impact can be avoided. According to the insertion of the conductive member 28 into different grooves 251, the first magnetic component 232 changes the gravitational force of the second magnetic component 26, so that the gravitational force of the movable rod 25 at different positions is the same, thereby avoiding the influence of gravitational force on the torque detection accuracy. Embodiment 2

[0038] The present invention also provides a photoelectric torque sensor detection system, including a driving member 1, and also including a photoelectric torque sensor 41, the photoelectric torque sensor 41 is sleeved on the flexible rod 4 and assembled and connected with the flexible rod 4. It also includes an actuator 5, the input end of the actuator 5 is provided with a rotating shaft 51, and the actuator 5 is connected to the flexible rod 4 through the rotating shaft 51. Specifically, the connection hole at the end of the flexible rod 4 away from the driving member 1 is connected to the detection component 2 through the second connecting member 31, and the rotating shaft 51 is connected to the detection component 2 through the first connecting member 3. The connection structure and method are the same as those described above and will not be repeated. The driving member 1 can drive the actuator 5 to work through the flexible rod 4, the photoelectric torque sensor 41 can detect torque, and the detection component 2 can detect the value output by the photoelectric torque sensor 41.

[0039] The photoelectric torque sensor detection system of the present application is applicable to production equipment, so as to detect the photoelectric torque sensor 41 of the production equipment, thereby reducing the risk of production failures and quality problems caused by measurement errors, and can also timely discover possible failures or performance degradation problems of the photoelectric torque sensor 41, so as to take corresponding maintenance measures to extend the service life of the photoelectric torque sensor 41. The photoelectric torque sensor detection system of the present application is also applicable to the detection system of the photoelectric torque sensor 41, so as to determine whether the output value of the photoelectric torque sensor 41 is accurate.

[0040] When in use, the driving member 1 drives the actuator 5 to rotate through the flexible rod 4. At this time, the flexible rod 4 is twisted and deformed, and the dynamic grating and the static grating of the photoelectric torque sensor 41 rotate relative to each other, so that the light transmission area between the dynamic grating and the static grating changes, and the irradiation area of ​​the light source received by the photoelectric sensitive element in the photoelectric torque sensor 41 changes. The control conversion circuit in the photoelectric torque sensor 41 converts the light flux signal on the photoelectric sensitive element into a voltage signal that is easy to detect and output, and forms a torque value after being processed by the controller; at the same time, the distance between the first limiter 21 and the second limiter 23 changes, so that the position between the movable rod 25 and the slide groove 231 moves relatively, and the conductive member 28 is inserted into the groove 251 and abuts against the conductive sheet 252 to form a loop with the controller and generate current. The controller compares the calibration value corresponding to the conductive sheet 252 at this time with the value of the photoelectric torque sensor 41 at this time, so as to detect whether the value of the photoelectric torque sensor 41 is accurate; at the same time, the buffer 27 is deformed. According to the stretching or compression of the buffer 27, the strain gauge can send the range value of the torque at this time through the controller, so as to perform secondary detection.

[0041] The photoelectric torque sensor detection device and system of the present invention, through the cooperation of the movable rod 25 and the elastic member 29, and the conductive member 28 is inserted into the groove 251 and abuts against the conductive sheet 252, the conductive member 28 and the conductive sheet 252 form a loop and generate current, thereby detecting the detection value of the photoelectric torque sensor 41, thereby avoiding affecting the production efficiency. The secondary detection can be completed by setting the buffer member 27 and the strain gauge. The first protrusion 22 and the second protrusion 24 are abutted, and the first limit member 21 and the second limit member 23 form a mutually meshing structure, so that the clamping between the first protrusion 22 and the second protrusion 24 is more stable.

[0042] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A photoelectric torque sensor detection device, characterized in that: include: A flexible rod capable of elastic deformation; a drive rod, the drive rod being rotatable; The detection component comprises a first limit member and a second limit member, the first limit member is connected to the driving rod, the second limit member is connected to the flexible rod, the first limit member comprises at least one first protrusion, the second limit member comprises at least one second protrusion, the first protrusion can abut against the second protrusion, so that the first limit member can drive the second limit member to rotate, the first protrusion is connected to a movable rod, the straight line where the movable rod is located is parallel to the axis of the driving rod, the second limit member is provided with a slide groove, the movable rod can extend into the slide groove, the side wall of the movable rod is provided with a groove, the bottom of the groove is provided with a conductive sheet, the side wall of the slide groove is connected with an elastic member, the end of the elastic member is connected with a conductive member, the conductive member can be inserted into the groove and abut against the conductive sheet, and the conductive member abuts against the conductive sheet for detecting torque; The side wall of the slide groove is provided with an installation groove, the elastic member is located in the installation groove, the conductive member can extend into the installation groove, and the groove is provided with multiple, and the resistance of the multiple conductive sheets gradually changes away from the first protrusion. A buffer member is connected between the first protrusion and the second limiting member, and a strain gauge is provided in the buffer member. The diameter of the conductive member gradually decreases away from the elastic member.

2. The photoelectric torque sensor detection device according to claim 1, characterized in that: A plurality of the first protrusions and the second protrusions are arranged at equal intervals, the slide groove is located between two adjacent second protrusions, and the first protrusion is located between two adjacent second protrusions, and there is a gap between the first protrusion and the second protrusion.

3. The photoelectric torque sensor detection device according to claim 2, characterized in that: The second protrusion is also connected to a movable rod, and the first limiting member is also provided with a sliding groove between two adjacent first protrusions.

4. The photoelectric torque sensor detection device according to claim 1, characterized in that: One end of the movable rod away from the first protrusion is connected to a first magnetic attraction component, and the bottom of the sliding groove is connected to a second magnetic attraction component.

5. A photoelectric torque sensor detection system, characterized in that: The photoelectric torque sensor detection device comprises the photoelectric torque sensor detection device according to any one of claims 1 to 4, and also comprises a driving member, the output end of the driving member is connected to the driving rod, a connecting block is provided at the end of the flexible rod, the diameter of the connecting block is larger than the diameter of the flexible rod, and the flexible rod is cooperatively connected with a photoelectric torque sensor.

6. The photoelectric torque sensor detection system according to claim 5, characterized in that: The driving rod is connected to the first limiting member via a first connecting member, the connecting block is connected to the second limiting member via a second connecting member, and further comprises an actuator connected to the flexible rod.

Images