A torque monitoring system

Abstract

The present invention provides a torque monitoring system, including a drum-shaped hexagonal coupling, an elastic body, a secondary coil, a primary coil, a strain collection and signal transmission circuit, a wireless power receiving board and a strain gauge, wherein the elastic body is arranged on the outer periphery of the drum-shaped hexagonal coupling, and the elastic body is provided with a secondary coil, a primary coil, a strain collection and signal transmission circuit and a wireless power receiving board, the strain gauge is arranged on the drum-shaped hexagonal coupling and is connected to the strain collection and signal transmission circuit, and the wireless power receiving board is connected to the secondary coil. The torque monitoring system uses the drum-shaped hexagonal coupling as a torque monitoring component, has a greater eccentric compatibility of the master / slave shaft and a greater axial movement adaptability, and cooperates with a wireless strain measurement mechanism to realize a long-distance, multi-node torque monitoring function.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical transmission and dynamic torque measurement, and in particular to a torque monitoring system. Background Art

[0002] In the actual operation of industrial and agricultural equipment, uncontrollable factors such as the working angle of the operating parts and the contact area of ​​external forces will affect the force applied to the operating parts, thus increasing the failure rate of the equipment. Therefore, in the research and development of industrial and agricultural equipment, torque testing and monitoring of rotating operating parts under all working conditions is an important part of the research and development of industrial and agricultural equipment.

[0003] In addition, in the actual operation process of industrial and agricultural equipment, most of the operating parts are in a rotating state and need to work in water or soil. In such a complex environment, it is difficult for the collection equipment to work in coordination with the operating parts.

[0004] The strain gauge of the stress monitoring device in the data acquisition device only has a sensing function and does not have the ability to record or transmit data. Therefore, it needs to work with other equipment (including power supply, data storage, and transmission).

[0005] The processing equipment needs to work with the operating parts of industrial and agricultural equipment, and it does not have the ability to collect data by itself. It needs to be connected to the strain gauge to collect the force, so wiring is required. In the case of rotation, the wiring needs to use slip rings (rotating electrical connectors) for signal transmission. This situation has high requirements for the various performances of the slip ring itself, and strain gauges need to be glued on site.

[0006] There are also some coupling-type torque sensors in the prior art, such as Chinese utility model authorization announcements CN202533206U, CN2793709Y and CN205333231U, but these torque sensors all replace couplings, which undoubtedly increases the design cost. Summary of the invention

[0007] In view of the above problems, the present invention provides a torque monitoring system, which uses a drum hexagonal coupling as a torque monitoring component, has greater eccentricity compatibility with the master / driven shaft and greater adaptability to axial movement, and cooperates with a wireless strain measurement mechanism to realize long-distance, multi-node torque monitoring functions.

[0008] A torque monitoring system includes a drum-shaped hexagonal coupling, an elastic body, a secondary coil, a primary coil, a strain collection and signal transmission circuit, a wireless power receiving board and a strain gauge. The elastic body is arranged on the outer periphery of the drum-shaped hexagonal coupling, and the secondary coil, the primary coil, the strain collection and signal transmission circuit and the wireless power receiving board are arranged on the elastic body. The strain gauge is arranged on the drum-shaped hexagonal coupling and is connected to the strain collection and signal transmission circuit, and the wireless power receiving board is connected to the secondary coil.

[0009] Preferably, the elastic body is made of an alloy material.

[0010] Preferably, the strain gauge is adhered to the drum-shaped hexagonal coupling.

[0011] Preferably, the strain gauges include four, and the four strain gauges form a full-bridge strain gauge circuit.

[0012] Preferably, the primary coil, the secondary coil, the strain collection and signal transmission circuit and the wireless power receiving board are encapsulated in an elastic body.

[0013] Preferably, a power adapter is also included, and the power adapter is connected to the primary coil via a power line.

[0014] Preferably, it also includes a receiving and data processing end, which includes a liquid crystal display, a digital signal output port, a power input port and a signal receiving antenna.

[0015] Preferably, the signal receiving antenna adopts a 2.4 GHz signal receiving module.

[0016] Preferably, the strain collection and signal transmission circuit includes a 2.4 GHz signal transmission module. Beneficial Effects

[0017] The present invention has the following beneficial effects:

[0018] (1) Using a standard hexagonal drum coupling as the test carrier, there is no need to perform secondary strain-torque calibration on the shaft to be tested;

[0019] (2) The full-bridge strain measurement method can effectively eliminate the influence of uncontrollable factors such as temperature and wire resistance on the measurement results;

[0020] (3) The use of wireless power supply + battery technology enables the DUT to be monitored for a long time without interruption, and ensures that stable monitoring can still be performed within several hours in the event of unexpected situations such as power outages;

[0021] (4) Using wireless communication technology, the device under test and the acquisition end do not need to be connected using wires and slip rings, and there is no need to consider wiring issues. It is easy to install and there is no secondary pollution such as dust;

[0022] (5) The present invention also has the advantages of low cost, easy replacement and simple wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural schematic diagram of an embodiment of a torque monitoring system of the present invention;

[0024] Figure 2 is a structural schematic diagram of another embodiment of a torque monitoring system of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a receiving and data processing end of a torque monitoring system of the present invention;

[0026] Figure 4 It is a schematic diagram of the overall structure of an embodiment of the torque monitoring system of the present invention.

[0027] Among them: 1-drum hexagonal coupling; 2-elastic body; 3-secondary coil; 4-primary coil; 5-strain acquisition and signal transmission circuit; 6-wireless power receiving board; 7-strain gauge; 8-power cord; 9-power adapter; 10-LCD display; 11-digital signal output port; 12-power input port; 13-signal receiving antenna, 14-receiving and data processing end, 15-test end. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described below in conjunction with the accompanying drawings. Those skilled in the art should understand that these embodiments are only illustrative and not restrictive.

[0029] Figure 1 Schematic diagram of a torque monitoring system of an embodiment of the present invention. As shown in the figure, a torque monitoring system includes a drum-shaped hexagonal coupling 1, an elastic body 2, a secondary coil 3, a primary coil 4 (see Figure 2 ), strain collection and signal transmission circuit 5, wireless power receiving board 6 and strain gauge 7, the elastomer 2 is arranged on the outer periphery of the drum-shaped hexagonal coupling 1, and the elastomer 2 is provided with a secondary coil 3, a primary coil 4, a strain collection and signal transmission circuit 5 and a wireless power receiving board 6, the strain gauge 7 is arranged on the drum-shaped hexagonal coupling 1 and is connected to the strain collection and signal transmission circuit 5, and the wireless power receiving board 6 is connected to the secondary coil 3.

[0030] The above torque monitoring system uses a drum hexagonal coupling as a transmission component of the master and slave rotating parts, combined with a wireless strain measurement mechanism to realize torque measurement on the rotating shaft, which can effectively monitor the torque carried by the transmission shaft, thereby monitoring the health status of the master and slave rotating parts.

[0031] Optionally, the elastic body 2 is made of an alloy material, and is detachably connected to the drum-shaped hexagonal coupling.

[0032] Optionally, the strain gauge 7 is pasted on the drum-shaped hexagonal coupling 1. The drum-shaped hexagonal coupling 1 of this embodiment can perform high-speed and high-torque power transmission within the range of 0.5mm eccentricity and 5mm axial movement, and according to the pasting method of the torque acquisition strain gauge 7, the pasting position of the strain gauge 7 is pre-designed and processed for the subsequent pasting of the strain gauge 7. The strain gauge 7 can be pasted on the processed drum-shaped hexagonal coupling 1 in the manner of a Wheatstone full bridge, and then the wireless power supply receiving module, battery, data acquisition system and 2.4GHz signal transmission system are installed on the drum-shaped hexagonal coupling 1, and docked and packaged with the strain gauge 7. After the packaging is completed, the transmission torque and strain signal of the coupling are directly calibrated. The wireless power supply receiving / transmitting end is debugged so that the power supply coil only needs to be wound 3 to 8 turns to meet the power supply requirements for the normal operation of the rotating part, so as to facilitate the difficulty of not being able to directly insert the entire power supply coil into the rotating shaft during installation in some scenarios.

[0033] Optionally, the strain gauges 7 include four strain gauges, and the four strain gauges form a full-bridge strain gauge circuit.

[0034] Optionally, the primary coil 4 , the secondary coil 3 , the strain collection and signal transmission circuit 5 and the wireless power supply receiving board 6 are encapsulated in the elastic body 2 .

[0035] Figure 2 1 is a schematic diagram of the structure of another embodiment of a torque monitoring system of the present invention. As shown in the figure, the torque monitoring system includes a power adapter 9, which is connected to the primary coil 4 through a power line 8. The secondary coil 3 receives the electric energy generated by the primary coil 4 and stores the electric energy in the wireless power receiving board 6.

[0036] Figure 3 1 is a schematic diagram of the structure of a receiving and data processing terminal 14 of a torque monitoring system of the present invention. Figure 3 As shown, the receiving and data processing end 14 includes a liquid crystal display screen 10, a digital signal output port 11, a power input port 12 and a signal receiving antenna 13. The signal receiving antenna adopts a 2.4 GHz signal receiving module.

[0037] Optionally, the strain collection and signal transmission circuit 5 includes a 2.4 GHz signal transmission module.

[0038] Figure 4 Schematic diagram of the overall structure of the torque monitoring system of the present invention. Figure 4As shown, the drum hexagonal coupling 1, the elastic body 2, the secondary coil 3, the primary coil 4, the strain collection and signal transmission circuit 5, the wireless power receiving board 6 and the strain gauge 7 constitute the test end 15, and the test end 15 is connected to the power adapter 9 through the power cord 8. The test end 15 of this embodiment combines the strain test system with the wireless signal transmission system, and is supplemented by the wireless power supply system, and is installed on the standard coupling as a whole to perform long-distance and long-term high-speed dynamic torque monitoring.

[0039] The torque monitoring system of this embodiment uses the drum-shaped hexagonal coupling 1 as the transmission component of the master and slave rotating parts, and combines the wireless strain measurement mechanism to realize the torque measurement on the rotating shaft, which can effectively monitor the torque carried by the transmission shaft, thereby monitoring the health status of the master and slave rotating parts. Compared with the traditional torque monitoring equipment, the present invention uses the drum-shaped hexagonal coupling as the torque monitoring component, which has greater compatibility with the eccentricity of the master / slave shaft and greater adaptability to axial movement. With the wireless measurement mechanism, it can realize the long-distance, multi-node torque monitoring function. The present invention also has the advantages of low cost, easy replacement, simple wiring, etc.

[0040] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A torque monitoring system, characterized in that: The invention comprises a drum-shaped hexagonal coupling (1), an elastic body (2), a secondary coil (3), a primary coil (4), a strain collection and signal transmission circuit (5), a wireless power receiving board (6) and a strain gauge (7), wherein the elastic body (2) is arranged on the outer periphery of the drum-shaped hexagonal coupling (1), the secondary coil (3), the primary coil (4), the strain collection and signal transmission circuit (5) and the wireless power receiving board (6) are arranged on the elastic body (2), the strain gauge (7) is arranged on the drum-shaped hexagonal coupling (1) and is connected to the strain collection and signal transmission circuit (5), and the wireless power receiving board (6) is connected to the secondary coil (3).

2. The torque monitoring system according to claim 1, characterized in that: The elastic body (2) is made of alloy material.

3. The torque monitoring system according to claim 1, characterized in that: The strain gauge (7) is adhered to the drum-shaped hexagonal coupling (1).

4. The torque monitoring system according to claim 3, characterized in that: The strain gauges (7) include four strain gauges, and the four strain gauges form a full-bridge strain gauge circuit.

5. The torque monitoring system according to claim 1, characterized in that: The primary coil (4), the secondary coil (3), the strain collection and signal transmission circuit (5) and the wireless power receiving board (6) are encapsulated in the elastic body (2).

6. The torque monitoring system according to claim 1, characterized in that: It also includes a power adapter (9), which is connected to the primary coil (4) via a power line (8).

7. The torque monitoring system according to claim 1, characterized in that: The strain collection and signal transmission circuit (5) comprises a 2.4 GHz signal transmission module.

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