A flexible torque measurement coupling device, a monitoring system device and a measurement method

Abstract

The present invention provides a flexible torque measurement coupling device, a monitoring system device and a measurement method. The flexible torque measurement coupling device includes a coaxially arranged coupling body, a power connection shaft and a passive connection shaft. The power connection shaft and the passive connection shaft are respectively arranged on the two end faces of the coupling body. The coupling body is a closed hollow structure, and the power connection shaft and the passive connection shaft are a solid structure. The end face of the coupling body is also provided with an antenna and a surface acoustic wave resonance component. The antenna and the surface acoustic wave resonance component are electrically connected. The surface acoustic wave resonance component is used to detect the torque parameters of the coupling body and is transmitted by the antenna. In the coupling device of the present invention, the shafts at both ends are solid and the middle part is hollow, so that the coupling body is flexible. Under the condition of ensuring the rigidity requirements of the coupling device, the coupling device can produce a larger deformation under the same force conditions as the traditional one, which is convenient for the surface acoustic wave resonance component to detect.

Description

Technical Field

[0001] The invention belongs to the technical field of torque detection, and relates to a flexible torque measurement coupling device, a monitoring system device and a measurement method. Background Art

[0002] Torque monitoring is mainly achieved by installing sensors on rotating parts to convert the strain changes of the shaft or coupling into frequency changes of the surface acoustic wave chip; the transformation is transmitted through the antenna connected to the chip. First, the reader transmits radio frequency radio waves to the sensor antenna through the reader antenna fixed on the housing. The sensor antenna supplies the electromagnetic waves to the chip for operation. When the reader finishes transmitting the signal, the sensor converts the received energy into electromagnetic waves with strain and temperature information, which are then returned to the reader antenna through the sensor antenna and demodulated by the reader, thereby realizing wireless passive sensing of shaft strain.

[0003] CN110017927A discloses a surface acoustic wave sensor for measuring automobile steering torque, which is composed of an elastic shaft, a first surface acoustic wave resonator, a second surface acoustic wave resonator, a third surface acoustic wave resonator, a sensor PCB board and an antenna. The invention uses the second surface acoustic wave resonator and the third surface acoustic wave resonator to eliminate the influence of temperature on torque measurement, and uses the first surface acoustic wave resonator to accurately measure the automobile steering torque. The invention uses the characteristics of surface acoustic wave technology with wireless passive signal transmission and combines with an innovative structure to achieve the purpose of eliminating the interference of ambient temperature changes on torque signal measurement, thereby ensuring the accuracy of steering torque measurement.

[0004] CN109405887A discloses a surface acoustic wave sensor for measuring torque and temperature and a detection method, comprising a zinc oxide film layer arranged on the left upper surface of a sensor substrate, a left interdigital transducer, a first reflection grating, a second reflection grating and a first sound absorbing strip arranged on the upper surface of the zinc oxide film layer, the first reflection grating and the second reflection grating are arranged on both sides of the left interdigital transducer respectively, the first sound absorbing strip is arranged on the outside of the first reflection grating or the second reflection grating, and a right interdigital transducer, a third reflection grating, a fourth reflection grating and a second sound absorbing strip are arranged on the right upper surface of the sensor substrate, the third reflection grating and the fourth reflection grating are arranged on both sides of the right interdigital transducer respectively, and the second sound absorbing strip is arranged on the outside of the third reflection grating or the fourth reflection grating; the scheme realizes a sensor capable of detecting both temperature and torque, saving installation time and manpower.

[0005] The existing technology mainly aims to remove the influence of temperature changes to ensure the accuracy of torque measurement, but the above sensors do not consider that in the actual installation process, the monitoring shaft needs to be added between the power side and the passive side. Due to assembly errors, the problem of different axes usually occurs during the connection process. In many existing systems, the power side, coupling, and passive side are fixed and cannot be modified, which cannot meet the torque monitoring needs generated on this basis. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a flexible torque measurement coupling device, a monitoring system device and a measurement method. The coupling body is designed to have a closed hollow structure, that is, the two end shafts of the coupling device are solid and the middle part is hollow. While ensuring the rigidity requirements of the coupling device, the coupling device can produce a larger deformation under the same force conditions as the traditional one, which is convenient for detection by the surface acoustic wave resonance component.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In the first aspect, the present invention provides a flexible torque measuring coupling device, which includes a coaxially arranged coupling body, a power connecting shaft and a passive connecting shaft, wherein the power connecting shaft and the passive connecting shaft are respectively arranged on two end faces of the coupling body, the coupling body is a closed hollow structure, and the power connecting shaft and the passive connecting shaft are a solid structure.

[0009] The end surface of the coupling body is also provided with an antenna and a surface acoustic wave resonance component, the antenna and the surface acoustic wave resonance component are electrically connected, and the surface acoustic wave resonance component is used to detect the torque parameter of the coupling body and is transmitted by the antenna.

[0010] The present invention ensures the rigidity requirement of the coupling device by designing the power connecting shaft and the passive connecting shaft at both ends to be solid and the middle coupling body to be hollow, and enables the coupling device to produce a larger deformation under the same force conditions as the traditional one. At the same time, the interference of the stress on the torque stress caused by the different axes on both sides of the power connecting shaft and the passive connecting shaft and the interference of temperature changes on the coupling device are eliminated, which further facilitates the detection of the surface acoustic wave resonance component and has the characteristics of simple structure, accurate measurement and easy implementation.

[0011] It should be noted that the present invention does not impose any specific requirements or special limitations on the material of the coupling device, and those skilled in the art may reasonably set it according to the actual application scenario. For example, it may be made of the same material as the shaft of the rotating part to be tested.

[0012] It should be noted that the present invention does not impose any specific requirements or special limitations on the molding method of the coupling device, and those skilled in the art can make a reasonable choice based on the structure, for example, it can be an integral casting.

[0013] As a preferred technical solution of the present invention, the coupling body is a cylindrical structure, the end faces of the coupling body are respectively the top face and the bottom face of the cylinder, and the closed hollow structure is a cylindrical cavity arranged in the coupling body.

[0014] As a preferred technical solution of the present invention, the surface acoustic wave resonance assembly includes at least two surface acoustic wave resonators, and the surface acoustic wave resonators are evenly arranged along the circumference of the coupling body.

[0015] Preferably, the surface acoustic wave resonators are arranged symmetrically around the center of the coupling body.

[0016] The present invention arranges the surface acoustic wave resonators evenly along the circumference of the coupling body and symmetrically around the center of the coupling body. Compared with the traditional single-point arrangement, the symmetrical arrangement can realize the simultaneous detection of stress changes caused by different axes and torque changes caused by actual power transmission, making the test results more accurate.

[0017] As a preferred technical solution of the present invention, the surface acoustic wave resonator includes a chip body, on which a temperature-sensitive resonator, a main strain resonator and an orthogonal strain resonator are arranged, and the placement direction of the main strain resonator is perpendicular to the placement direction of the orthogonal strain resonator.

[0018] The present invention sets a temperature-sensitive resonator, a main strain resonator and an orthogonal strain resonator. The main stress resonator and the orthogonal strain resonator respectively measure the strains in corresponding directions. The main strain resonator is used to measure the stress changes caused by different axes, and the orthogonal strain resonator is used to measure the torque changes caused by power output, so that the torque parameters can be accurately calculated.

[0019] As a preferred technical solution of the present invention, the antenna is arranged along the circumferential edge of the coupling body, the antenna includes a ring-shaped antenna substrate, an antenna pattern is arranged on the bonding side of the ring-shaped antenna substrate and the coupling body, the ring-shaped antenna substrate is electrically connected to the surface acoustic wave resonant component, and the antenna also includes a radio frequency coaxial cable arranged on the ring-shaped antenna substrate.

[0020] As a preferred technical solution of the present invention, the antenna and the surface acoustic wave resonance component are fixedly arranged on the coupling body.

[0021] Preferably, the fixing method includes gluing or welding.

[0022] Preferably, the surface acoustic wave resonance component and the coupling body are fixed by gluing with epoxy resin.

[0023] As a preferred technical solution of the present invention, the coupling body, the power connecting shaft and the passive connecting shaft are in an integrated structure.

[0024] As a preferred technical solution of the present invention, the enclosed hollow structure is centrally arranged in the coupling body.

[0025] In a second aspect, the present invention provides a torque monitoring system device, which includes a reader and the flexible torque measuring coupling device as described in the first aspect, wherein the reader is used to receive a detection signal emitted by the flexible torque measuring coupling device.

[0026] In a third aspect, the present invention provides a torque measurement method, wherein the torque measurement method adopts the torque monitoring system device as described in the second aspect, and the torque measurement method comprises:

[0027] The power connecting shaft and the passive connecting shaft are connected to the power side and the passive side of the rotating part to be tested respectively. The rotating part to be tested is started to drive the coupling body to rotate. The surface acoustic wave resonance component collects the torque parameters of the rotating part to be tested and transmits them to the reader through the antenna. The reader obtains the torque measurement result after analysis.

[0028] The system refers to an equipment system, a device system or a production device.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention ensures the rigidity requirement of the coupling device by designing the power connecting shafts and the passive connecting shafts at both ends to be solid and the middle coupling body to be hollow, and enables the coupling device to produce a larger deformation under the same force conditions as the traditional one, and eliminates the interference of stress caused by different axes on the torque stress and the interference of temperature changes on the coupling device, further facilitating the detection of the surface acoustic wave resonance component, and having the characteristics of simple structure, accurate measurement and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the appearance of a flexible torque measurement coupling device provided in a specific embodiment of the present invention;

[0032] Figure 2 A cross-sectional schematic diagram of a flexible torque measurement coupling device provided in a specific embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the connection structure between an antenna and a surface acoustic wave resonant component provided in a specific embodiment of the present invention;

[0034] Figure 4 FIG. 1 is a schematic diagram of the structure of a surface acoustic wave resonator provided in a specific embodiment of the present invention, ST Represents the temperature sensitive tangent, S X represents the principal strain measurement tangential direction, S Y represents the orthogonal strain measurement tangent direction;

[0035] Figure 5 A schematic diagram of the placement of a surface acoustic wave resonator provided in a specific embodiment of the present invention.

[0036] Among them, 1-coupling body; 2-power connection shaft; 3-passive connection shaft; 4-antenna; 5-surface acoustic wave resonator component; 6-antenna pattern; 7-RF coaxial cable; 8-chip; 9-main strain resonator; 10-orthogonal strain resonator; 11-temperature sensitive resonator. DETAILED DESCRIPTION

[0037] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0039] The technical solution of the present invention is further illustrated below through specific implementation methods.

[0040] In a specific embodiment, the present invention provides a flexible torque measurement coupling device, such as Figure 1 and Figure 2As shown, the flexible torque measuring coupling device includes a coaxially arranged coupling body 1, a power connecting shaft 2 and a passive connecting shaft 3, wherein the power connecting shaft 2 and the passive connecting shaft 3 are respectively arranged on two end faces of the coupling body 1, the coupling body 1 is a closed hollow structure, and the power connecting shaft 2 and the passive connecting shaft 3 are solid structures.

[0041] The end surface of the coupling body 1 is also provided with an antenna 4 and a surface acoustic wave resonance component 5, and the antenna 4 and the surface acoustic wave resonance component 5 are electrically connected. The surface acoustic wave resonance component 5 is used to detect the torque parameter of the coupling body 1 and is transmitted by the antenna 4.

[0042] The present invention ensures the rigidity requirement of the coupling device by designing the power connecting shaft 2 and the passive connecting shaft 3 at both ends to be solid and the middle coupling body 1 to be hollow, and enables the coupling device to produce a larger deformation under the same force conditions as the traditional one, while eliminating the interference of stress caused by different axes on the torque stress and the interference of temperature changes on the coupling device, further facilitating the detection of the surface acoustic wave resonance component 5, and having the characteristics of simple structure, accurate measurement and easy implementation.

[0043] Optionally, the shafts of the rotating parts to be tested are made of the same material, and the coupling body 1, the power connection shaft 2 and the passive connection shaft 3 are integrally cast.

[0044] Specifically, as a preferred technical solution of the present invention, the coupling body 1 is a cylindrical structure, the end faces of the coupling body 1 are respectively the top and bottom surfaces of the cylinder, and the closed hollow structure is a cylindrical cavity arranged in the coupling body 1.

[0045] Specifically, Figure 2 As shown, the surface acoustic wave resonance component 5 includes at least two surface acoustic wave resonators, and the surface acoustic wave resonators are evenly arranged along the circumference of the coupling body 1. Furthermore, the surface acoustic wave resonators are arranged symmetrically around the center of the coupling body 1. The present invention arranges the surface acoustic wave resonators evenly along the circumference of the coupling body 1 and arranges them symmetrically around the center of the coupling body 1. Compared with the traditional single-point arrangement, the symmetrical arrangement can realize the simultaneous detection of stress changes caused by different axes and torque changes caused by actual power transmission, so that the test results are more accurate.

[0046] Specifically, if Figure 4 As shown, the surface acoustic wave resonator includes a chip 8 body, on which a temperature sensitive resonator 11, a main strain resonator 9 and an orthogonal strain resonator 10 are arranged, and the placement direction of the main strain resonator 9 is perpendicular to the placement direction of the orthogonal strain resonator 10. Further, as Figure 5As shown, two chips 8 are arranged on the X axis, each chip 8 has a temperature sensitive resonator 11, a main strain resonator 9 and an orthogonal strain resonator 10, wherein the X direction is parallel to the S axis of the two chips 8. Y The Y direction coincides with the S direction of the two chips 8, which is used to measure the stress changes caused by different axes. X The directions coincide, and are used to measure the torque changes caused by power transmission. The present invention sets a temperature-sensitive resonator 11, a main strain resonator 9 and an orthogonal strain resonator 10, and the main stress resonator and the orthogonal strain resonator 10 respectively measure the strains in the corresponding directions, wherein the main strain resonator 9 is used to measure the stress changes caused by different axes, and the orthogonal strain resonator 10 is used to measure the torque changes caused by power output, so that the torque parameters can be accurately calculated.

[0047] Specifically, Figure 3 As shown, the antenna 4 is arranged along the circumferential edge of the coupling body 1, and the antenna 4 includes an antenna 4 substrate, and the antenna 4 pattern is arranged on the side where the antenna 4 substrate and the coupling body 1 are attached, and the antenna 4 substrate is electrically connected to the surface acoustic wave resonance component 5, and the antenna 4 also includes a radio frequency coaxial cable 7 (i.e., a transmitter, which transmits signals to the outside and communicates as a transmitter, and can be reasonably replaced according to actual needs by a person skilled in the art). Further, the antenna 4 and the surface acoustic wave resonance component are fixedly arranged on the coupling body 1, and preferably, the fixing method includes gluing or welding, and the surface acoustic wave resonance component is fixed to the coupling body 1 by epoxy resin gluing.

[0048] Specifically, the coupling body 1, the power connection shaft 2 and the passive connection shaft 3 are in an integrated structure.

[0049] Specifically, the enclosed hollow structure is centrally arranged in the coupling body 1 .

[0050] The present invention provides a torque monitoring system device, which comprises a reader and the above-mentioned flexible torque measuring coupling device, wherein the reader is used for receiving a detection signal sent by the flexible torque measuring coupling device.

[0051] In another specific embodiment, the present invention provides a torque measurement method, wherein the torque measurement method adopts the torque monitoring system device as described in the second aspect, and the torque measurement method comprises:

[0052] The power connecting shaft 2 and the passive connecting shaft 3 are respectively connected to the power side and the passive side of the rotating part to be measured, and the rotating part to be measured is started to drive the coupling body 1 to rotate. The surface acoustic wave resonance component 5 collects the torque parameters of the rotating part to be measured, and the antenna 4 transmits them to the reader. The reader obtains the torque measurement result after analysis.

[0053] Through a specific implementation method, the present invention ensures the rigidity requirement of the coupling device by designing the power connecting shaft 2 and the passive connecting shaft 3 at both ends to be solid and the middle coupling body 1 to be hollow, so as to enable the coupling device to produce a larger deformation under the same force conditions as the traditional one, and at the same time eliminate the interference of the stress caused by different axes on the torque stress and the interference of temperature changes on the coupling device, further facilitating the detection of the surface acoustic wave resonance component 5, and having the characteristics of simple structure, accurate measurement and easy implementation.

[0054] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A flexible torque measuring coupling device, characterized in that: The flexible torque measurement coupling device comprises a coaxially arranged coupling body, a power connection shaft and a passive connection shaft, wherein the power connection shaft and the passive connection shaft are respectively arranged on two end faces of the coupling body, the coupling body is a closed hollow structure, the power connection shaft and the passive connection shaft are solid structures, the coupling body is a cylindrical structure, the end faces of the coupling body are respectively the top face and the bottom face of the cylinder, and the closed hollow structure is a cylindrical cavity arranged in the coupling body; The end surface of the coupling body is also provided with an antenna and a surface acoustic wave resonance component, the antenna and the surface acoustic wave resonance component are electrically connected, the surface acoustic wave resonance component is used to detect the torque parameter of the coupling body and is transmitted by the antenna, the antenna is arranged along the circumferential edge of the coupling body, the antenna includes a ring-shaped antenna substrate, and an antenna pattern is arranged on the bonding side of the ring-shaped antenna substrate and the coupling body, the ring-shaped antenna substrate is electrically connected to the surface acoustic wave resonance component, and the antenna also includes a radio frequency coaxial cable arranged on the ring-shaped antenna substrate.

2. The flexible torque measurement coupling device according to claim 1, characterized in that: The surface acoustic wave resonance component includes at least two surface acoustic wave resonators, and the surface acoustic wave resonators are evenly arranged along the circumference of the coupling body.

3. The flexible torque measuring coupling device according to claim 2, characterized in that: The surface acoustic wave resonators are arranged symmetrically around the center of the coupling body.

4. The flexible torque measurement coupling device according to claim 2, characterized in that: The surface acoustic wave resonator comprises a chip body, on which a temperature sensitive resonator, a main strain resonator and an orthogonal strain resonator are arranged, and the placement direction of the main strain resonator and the placement direction of the orthogonal strain resonator are perpendicular to each other.

5. The flexible torque measuring coupling device according to claim 1, characterized in that: The antenna and the surface acoustic wave resonance component are fixedly arranged on the coupling body.

6. The flexible torque measuring coupling device according to claim 5, characterized in that: The fixing method includes gluing or welding.

7. The flexible torque measuring coupling device according to claim 6, characterized in that: The surface acoustic wave resonance component is fixed to the coupling body by epoxy resin.

8. The flexible torque measuring coupling device according to claim 1, characterized in that: The coupling body, the power connecting shaft and the passive connecting shaft are in an integrated structure.

9. The flexible torque measuring coupling device according to claim 1, characterized in that: The cylindrical cavity is centrally arranged in the coupling body.

10. A torque monitoring system, characterized in that: The torque monitoring system comprises a reader and the flexible torque measuring coupling device according to any one of claims 1 to 9, wherein the reader is used for receiving a detection signal emitted by the flexible torque measuring coupling device.

11. A method for measuring torque, characterized in that: The torque measurement method adopts the torque monitoring system according to claim 10, and the torque measurement method comprises: The power connecting shaft and the passive connecting shaft are connected to the power side and the passive side of the rotating part to be tested respectively. The rotating part to be tested is started to drive the coupling body to rotate. The surface acoustic wave resonance component collects the torque parameters of the rotating part to be tested and transmits them to the reader through the antenna. The reader obtains the torque measurement result after analysis.

Images