Rolling mill torsional vibration telemetering device and method based on wireless power supply

Abstract

The invention relates to the field of vibration monitoring, and provides a rolling mill torsional vibration telemetering device and method based on wireless power supply, and the device comprises a microwave transmitter which is used for providing microwave energy for a torsional vibration signal collection and transmission unit; the torsional vibration signal acquisition and transmission unit receives the microwave energy provided by the microwave transmitter, converts the microwave energy into electric energy, acquires a torsional vibration signal of a transmission shaft of the rolling mill under the driving of the electric energy and transmits the torsional vibration signal to the torsional vibration signal receiving unit; the torsional vibration signal receiving unit is used for receiving and processing the torsional vibration signal acquired by the torsional vibration signal acquisition and transmission unit; and the torsional vibration signal acquisition and transmission unit is mounted on a rolling mill transmission shaft. The torsional vibration monitoring device is convenient to use and install, stable in power supply and capable of being applied to torsional vibration signal monitoring of most rotating shafts.

Description

Technical Field

[0001] The invention relates to the field of vibration monitoring, and in particular to a rolling mill torsional vibration telemetry device and method based on wireless power supply. Background Art

[0002] As a complex mechanical equipment, rolling mill is mainly used for the production and rolling of steel. During the production process, due to changes in rolling process, rolling material, etc., rolling mill vibration often occurs, resulting in reduced product precision and affecting product quality. At the same time, due to the complexity of rolling mill equipment, faults often occur during operation, such as damage to transmission gears, deflection or breakage of transmission shafts, which not only reduce production efficiency but also affect product quality. By monitoring the torsional vibration of the main transmission shaft, the torque changes on the transmission shaft and the vibration state of the main transmission of the rolling mill can be learned, so that on-site technicians can take corresponding measures according to the torsional vibration signal to improve the vibration phenomenon of the rolling mill and improve product quality. The torsional vibration monitoring equipment currently used on-site is mainly powered by batteries and brushes, but both have certain limitations.

[0003] 1. Battery power supply makes it difficult to achieve long-term monitoring. The difficulty of battery replacement is related to the installation location and is generally only used for temporary monitoring.

[0004] 2. Although brush power supply can achieve long-term power supply, the frictional heat and frictional wear of the brushes during the power supply process will affect the measurement accuracy.

[0005] Based on the limitations of the above-mentioned vibration monitoring equipment, there is an urgent need for a rolling mill torsional vibration monitoring system that is easy to use, easy to install, and capable of long-term stable power supply to meet the actual needs of the site. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a rolling mill torsional vibration telemetry device and method based on wireless power supply. The device is not only simple to install and maintain, but also capable of long-term stable power supply and can be used to monitor different rotating shaft positions, greatly facilitating on-site monitoring and use.

[0007] The present invention adopts the following technical solution:

[0008] On the one hand, the present invention provides a rolling mill torsional vibration telemetry device based on wireless power supply, comprising a microwave transmitter, a torsional vibration signal acquisition and transmission unit, and a torsional vibration signal receiving unit;

[0009] The microwave transmitter is used to provide microwave energy to the torsional vibration signal acquisition and transmission unit;

[0010] The torsional vibration signal collection and transmission unit receives the microwave energy provided by the microwave transmitter and converts it into electrical energy. Driven by the converted electrical energy, the torsional vibration signal of the rolling mill drive shaft is collected and transmitted to the torsional vibration signal receiving unit.

[0011] The torsional vibration signal receiving unit is used to receive and process the torsional vibration signal collected by the torsional vibration signal collecting and transmitting unit;

[0012] The torsional vibration signal acquisition and transmission unit is installed on the rolling mill transmission shaft.

[0013] Any possible implementation as described above, further provides an implementation, wherein the torsional vibration signal acquisition and transmission unit includes a torque ring, a microwave receiving antenna, a rectifier circuit, a voltage stabilizing module, a strain gauge, a strain bridge, a filter amplifier, an A / D converter, a wireless transmitter, a bridge power supply and a light emitting diode;

[0014] The microwave receiving antenna, the rectifier circuit, and the voltage stabilizing module are connected in sequence; after the microwave receiving antenna receives microwave energy, it is converted into electrical energy through the rectifier circuit, and a stable voltage is provided through the voltage stabilizing module;

[0015] The strain gauge, strain bridge, filter amplifier, A / D converter, and wireless transmitter are connected in sequence; the torsional vibration signal collected by the strain gauge is converted into an electrical signal after passing through the strain bridge, and then filtered and amplified by the filter amplifier, and then converted from an analog signal to a digital signal after passing through the A / D converter, and then the processed digital signal is transmitted to the torsional vibration signal receiving unit through the wireless transmitter;

[0016] The voltage stabilizing module is respectively connected to the bridge power supply, the filter amplifier, the wireless transmitter, and the light emitting diode, and the bridge power supply is connected to the strain bridge; the voltage stabilizing module is respectively powered by the bridge power supply, the filter amplifier, the wireless transmitter, and the light emitting diode, and the bridge power supply is powered by the strain bridge; the light emitting diode is used to transmit optical signals to the photoelectric sensor of the microwave transmitter.

[0017] The torsional vibration signal acquisition and transmission unit is arranged on the torque ring, and the torque ring is fixedly mounted on the rolling mill transmission shaft.

[0018] Any possible implementation as described above, further provides an implementation, wherein the torque ring is a circular ring structure with a certain thickness, fixed to the rolling mill drive shaft by bolts; the microwave receiving antenna is a plurality of flat-plate antennas, all of which are arranged on the side along the thickness direction of the torque ring and are evenly arranged along the circumferential direction of the torque ring, and the light-emitting diode is installed on one side of the microwave receiving antenna.

[0019] As any possible implementation described above, there is further provided an implementation, wherein the strain gauge is welded on the transmission shaft of the rolling mill, and a recessed portion is provided at a position on the inner side of the torque ring corresponding to the strain gauge.

[0020] Any possible implementation as described above, further provides an implementation, wherein the microwave transmitter includes an AC / DC power supply, a processor, a photoelectric sensor, a power regulator, a microwave source, a fixing plate, and a fixing base;

[0021] The processor is respectively connected to the AC / DC power supply, the photoelectric sensor, and the power regulator. The power regulator is connected to the microwave source. The photoelectric sensor is used to receive the optical signal of the light emitting diode.

[0022] The power regulator controls the microwave source to emit energy according to the photoelectric sensor signal.

[0023] The microwave emitting unit is arranged on a fixed plate, the torque ring is fixedly mounted on a rolling mill transmission shaft, and the fixed plate is mounted on the fixed base.

[0024] The upper part of the fixed plate is provided with a concave surface with a certain curvature, and the concave surface corresponds to the rolling mill drive shaft; the microwave sources are multiple and dispersedly arranged along the concave surface of the fixed plate.

[0025] Any possible implementation as described above further provides an implementation, wherein the number of the microwave sources is 5-7, the installation position of the microwave sources is a concave surface, and the distance from each microwave source to the rolling mill drive shaft is equal.

[0026] As any possible implementation described above, there is further provided an implementation, wherein the fixing plate is arranged on a side of the torque ring where the microwave receiving antenna is located, and a certain distance is maintained.

[0027] The fixing plate setting mode of the present invention, the coordinated design of multiple microwave sources and multiple microwave receiving antennas ensures that no matter what the rotation angle of the transmission shaft is at, at any time, there is a microwave source and a plurality of microwave receiving antennas that maintain the most suitable transmission distance, ensuring that the microwave energy can be stably received by the microwave receiving antennas, thereby ensuring the stability of the operation of the entire device.

[0028] As any possible implementation described above, an implementation is further provided, wherein the torsional vibration signal receiving unit includes a wireless receiver, a portable display and an all-in-one machine, and the wireless receiver is connected to the portable display and / or the all-in-one machine.

[0029] As any possible implementation described above, there is further provided an implementation, in which the integrated machine is provided with an alarm function, and when the torsional vibration signal detected is higher than a set threshold, the alarm function is triggered.

[0030] On the other hand, the present invention also provides a rolling mill torsional vibration telemetry method based on wireless power supply, the method using the above-mentioned device, the method comprising:

[0031] S1. Install a torsional vibration signal acquisition and transmission unit on the torque ring, wherein a plurality of microwave receiving antennas are evenly installed on the side of the torque ring along the thickness direction, and a strain gauge is arranged on the inner side of the torque ring and fixed on the rolling mill transmission shaft;

[0032] S2, mounting the microwave transmitter on a fixed plate, the fixed plate being fixed on a fixed base, and the multiple microwave sources of the microwave transmitter being equidistant from the torque ring;

[0033] S3. After installation, the rolling mill works, the rolling mill drive shaft rotates at high speed, the AC / DC power supply of the microwave transmitter is turned on, the microwave source emits microwaves, and the microwave receiving antenna receives the microwave energy and converts it into electrical energy through the rectifier circuit, and provides a stable voltage to the outside through the voltage stabilizing module; the photoelectric sensor receives the light signal of the light emitting diode, measures the speed of the rolling mill drive shaft, and controls the power regulator through the processor to adjust the microwave source to emit microwave energy according to the measured speed; the strain gauge collects the torsional vibration signal of the rolling mill drive shaft, converts it into an electrical signal after passing through the strain bridge, and then filters and amplifies it through the filter amplifier, and then converts it from an analog signal to a digital signal after passing through the A / D converter, and then transmits the processed digital signal to the wireless receiver of the torsional vibration signal receiving unit through the wireless transmitter; after receiving the torsional vibration signal, the wireless receiver transmits it to the portable display or all-in-one machine for display or alarm.

[0034] The beneficial effects of the present invention are:

[0035] 1. It is easy to install on site and simple to operate. It can be installed in a very short time.

[0036] 2. It can carry out long-term stable monitoring and use, and is rarely restricted by the monitoring environment and installation location.

[0037] 3. Able to formulate appropriate torsional vibration thresholds based on on-site equipment, warn on-site staff and reduce the occurrence of equipment failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Shown is a schematic structural diagram of a rolling mill torsional vibration telemetry device based on wireless power supply according to an embodiment of the present invention.

[0039] Figure 2 Shown is a schematic diagram of a microwave transmitter in an embodiment.

[0040] Figure 3 Shown is a schematic diagram of a torsional vibration signal acquisition and transmission unit in an embodiment.

[0041] Figure 4 Shown is a schematic diagram of a torsional vibration signal receiving unit in an embodiment.

[0042] Figure 5 Shown is a schematic diagram of the working principle of the torsional vibration monitoring device of the present invention.

[0043] In the figure: 1-microwave transmitter, 2-torsional vibration signal acquisition and transmission unit, 3-torsional vibration signal receiving unit, 4-rolling mill drive shaft, 101-AC / DC power supply, 102-processor, 103-photoelectric sensor, 104-power regulator, 105-microwave source, 106-fixed plate, 107-fixed base, 108-adjusting bolt, 201-microwave receiving antenna, 202-rectifier circuit, 203-strain gauge, 204-strain bridge, 205-bridge power supply, 206-voltage stabilizing module, 207-filter amplifier, 208-A / D converter, 209-wireless transmitter, 210-torque ring, 211-fixing bolt, 212-light emitting diode, 301-wireless receiver, 302-portable display, 303-all-in-one machine. DETAILED DESCRIPTION

[0044] The specific embodiments of the present invention will be described in detail below in conjunction with specific drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated, and they can be combined with each other to achieve better technical effects.

[0045] like Figure 1-5 As shown, a rolling mill torsional vibration telemetry device based on wireless power supply according to an embodiment of the present invention comprises: a microwave transmitter 1, a torsional vibration signal acquisition and transmission unit 2 and a torsional vibration signal receiving unit 3;

[0046] The microwave transmitter 1 is used to provide microwave energy to the torsional vibration signal acquisition and transmission unit 2;

[0047] The torsional vibration signal acquisition and transmission unit 2 receives the microwave energy provided by the microwave transmitter 1 and converts it into electrical energy. Driven by the converted electrical energy, the torsional vibration signal of the rolling mill drive shaft 4 is collected and transmitted to the torsional vibration signal receiving unit 3.

[0048] The torsional vibration signal receiving unit 3 is used to receive and process the torsional vibration signal collected by the torsional vibration signal collecting and transmitting unit 2;

[0049] The torsional vibration signal acquisition and transmission unit 2 is installed on the rolling mill transmission shaft 4 .

[0050] In a specific embodiment, Figure 3 As shown, the torsional vibration signal acquisition and transmission unit 2 includes a torque ring 210, a microwave receiving antenna 201, a rectifier circuit 202, a voltage stabilizing module 206, a strain gauge 203, a strain bridge 204, a filter amplifier 207, an A / D converter 208, a wireless transmitter 209, a bridge power supply 205 and a light emitting diode 212;

[0051] The microwave receiving antenna 201, the rectifier circuit 202, and the voltage stabilizing module 206 are connected in sequence; after the microwave receiving antenna 201 receives microwave energy, it is converted into electrical energy through the rectifier circuit 202, and a stable voltage is provided through the voltage stabilizing module 206;

[0052] The strain gauge 203, strain bridge 204, filter amplifier 207, A / D converter 208, and wireless transmitter 209 are connected in sequence; the torsional vibration signal collected by the strain gauge 203 is converted into an electrical signal after passing through the strain bridge 204, and then filtered and amplified by the filter amplifier 207, and then converted from an analog signal to a digital signal after passing through the A / D converter 208, and then the processed digital signal is transmitted to the torsional vibration signal receiving unit 3 through the wireless transmitter 209; Figure 5 As shown;

[0053] The voltage stabilizing module 206 is respectively connected to the bridge power supply 205, the filter amplifier 207, the wireless transmitter 209, and the light emitting diode 212. The bridge power supply 205 is connected to the strain bridge 204. The voltage stabilizing module 206 is respectively powered by the bridge power supply 205, the filter amplifier 207, the wireless transmitter 209, and the light emitting diode 212. The bridge power supply 206 is used to power the strain bridge 204. The light emitting diode 212 transmits optical signals to the photoelectric sensor 103. Figure 5 shown.

[0054] The torsional vibration signal acquisition and transmission unit 2 is arranged on a torque ring 210 , and the torque ring 210 is fixedly mounted on the rolling mill transmission shaft 4 .

[0055] In a specific embodiment, Figure 3 As shown, the torque ring 210 is a circular ring structure with a certain thickness, which is buckled on the rolling mill drive shaft 4 and fixed by fixing bolts 211; the microwave receiving antenna 201 is a plurality of flat antennas, which are all arranged on the side along the thickness direction of the torque ring 210 and are evenly arranged along the circumferential direction of the torque ring 210, and the light-emitting diode is installed on one side of the microwave receiving antenna.

[0056] In a specific embodiment, there are 20-30 microwave receiving antennas 201 , which are evenly arranged around the torque ring 210 .

[0057] In a specific embodiment, the strain gauge 203 is welded to the rolling mill drive shaft 4, and a recessed portion is provided on the inner side of the torque ring 210 at a position corresponding to the strain gauge 203, so as to facilitate secondary fixation of the strain gauge 203 and prevent the strain gauge 203 from falling off and injuring people when rotating at high speed.

[0058] In a specific embodiment, the microwave transmitter 1 includes an AC / DC power supply 101, a processor 102, a photoelectric sensor 103, a power regulator 104, a microwave source 105, a fixing plate 106, a fixing base 107, and an adjusting bolt 108;

[0059] The processor 102 is respectively connected to the AC / DC power supply 101, the photoelectric sensor 103, and the power regulator 104, the power regulator 104 is connected to the microwave source 105, the microwave emitting unit 1 is arranged on a fixing plate 106, and the fixing plate 106 is mounted on the fixing base 107;

[0060] The upper part of the fixing plate 106 is provided with a concave surface with a certain curvature, and the concave surface corresponds to the rolling mill drive shaft 4; there are multiple microwave sources 105, which are dispersedly arranged along the concave surface of the fixing plate 106. Figure 2 shown.

[0061] In a specific embodiment, the AC / DC power supply 101 can be a 220V power supply at the monitoring site or a mobile power supply.

[0062] In a specific embodiment, the fixing plate 106 is disposed on a side of the torque ring 210 where the microwave receiving antenna 201 is located, and is kept at a certain distance.

[0063] In a specific embodiment, the fixing plate 106 is connected to the fixing base 107 via an adjusting bolt 108. The fixing base 107 is fixed at the on-site installation position via bolts.

[0064] In a specific embodiment, the number of microwave sources 105 is 5-7, and the distance between each microwave source 105 and the rolling mill drive shaft 4 is equal. Multiple microwave sources 105 ensure sufficient transmission energy and sufficient receiving energy; the position of the fixing plate 103 where the microwave source 102 is installed is processed into a concave surface to enhance the transmission of microwave signals.

[0065] In a specific embodiment, the photoelectric sensor 103 is used to measure the rotational speed of the transmission shaft 4 and transmit the signal to the processor 102; the processor 102 feeds back to the power regulator 104 according to the received signal; the power regulator 104 adjusts the output energy of the microwave source 105 based on the rotational speed of the transmission shaft 4 to ensure that the microwave receiving antenna 201 receives stable and sufficient energy per unit time.

[0066] In a specific embodiment, the adjusting bolt 108 is used to adjust the relative position of the microwave source 105 and the microwave receiving antenna 201 to ensure that the microwave energy can be transmitted to the microwave receiving antenna 201 .

[0067] In a specific embodiment, the strain gauge 203 is directly welded on the transmission shaft 4 to be monitored using a simple electric welder, and multiple strain gauges 203 can be welded as needed to monitor different parts of the shaft.

[0068] In a specific embodiment, the torque ring 210 is a homogeneous ring, and the diameter, width, etc. can be customized according to the diameter of the monitoring transmission shaft 4 and the working environment to meet on-site requirements. At the same time, the inner side of the torque ring 210 is designed to be recessed for placing the welded strain gauge 203, thereby reducing the space occupied by the rotating shaft and secondary fixing the strain gauge 203 to reduce the possibility of it falling off.

[0069] In a specific embodiment, Figure 4 As shown, the torsional vibration signal receiving unit 3 includes a wireless receiver 301, a portable display 302 and an integrated device 303, wherein the wireless receiver 301 is connected to the portable display 302 and / or the integrated device 303. The integrated device 303 is provided with an alarm function, and when the torsional vibration signal detected is higher than a set threshold, the alarm function is triggered.

[0070] In a specific embodiment, the portable display 302 is handheld, which is convenient to carry around and is particularly suitable for use during installation and equipment maintenance.

[0071] An embodiment of the present invention provides a rolling mill torsional vibration telemetry method based on wireless power supply, the method using the above-mentioned device, the method comprising:

[0072] S1, installing the torsional vibration signal acquisition and transmission unit 2 on the torque ring 210, wherein a plurality of microwave receiving antennas 201 are evenly installed on the side of the torque ring 210 along the thickness direction, and the strain gauge 203 is arranged on the inner side of the torque ring 210 and fixed on the rolling mill transmission shaft 4;

[0073] S2, installing the microwave launcher 1 on the fixing plate 103, the fixing plate 103 is fixed on the fixing base 104, and the multiple microwave sources 102 of the microwave launcher 1 are equidistant from the torque ring 210;

[0074] S3. After the installation is completed, the rolling mill is in operation, the rolling mill drive shaft 4 rotates at a high speed, the AC / DC power supply 101 of the microwave transmitter 1 is turned on, the microwave source 105 emits microwaves, and the microwave receiving antenna 201 receives the microwave energy and converts it into electrical energy through the rectifier circuit 202, and provides a stable voltage through the voltage stabilizing module 206; the photoelectric sensor 103 receives the light signal of the light emitting diode 212, measures the rotation speed of the rolling mill drive shaft 4, and controls the power regulator 104 through the processor 102 to adjust the microwave source 105 to emit microwave energy according to the measured rotation speed; the strain gauge 203 collects the torsional vibration signal of the rolling mill drive shaft 4, converts it into an electrical signal after passing through the strain bridge 204, and then filters and amplifies it through the filter amplifier 207, and then converts it from an analog signal to a digital signal after passing through the A / D converter 208, and then transmits the processed digital signal to the wireless receiver 301 of the torsional vibration signal receiving unit 3 through the wireless transmitter 209; after receiving the torsional vibration signal, the wireless receiver 301 transmits it to the portable display 302 or the all-in-one machine 303 for display or alarm.

[0075] Working principle of the present invention:

[0076] After the on-site torsional vibration telemetry device is installed, the AC / DC power supply 101 powers the microwave transmitter 1, so that the microwave transmitter 1 transmits microwave signals to the microwave receiving antenna 201 in the torsional vibration signal acquisition and transmission unit 2, and converts the microwave energy into electrical energy through the line by the rectifier circuit 202 to power various parts of the torsional vibration signal acquisition and transmission unit 2. The portable display 302 in the torsional vibration signal receiving unit 3 is powered by a battery, or the all-in-one machine 303 is powered by a 220V voltage. At this point, the rolling mill vibration remote monitoring system based on microwave power supply is completed. Explanation of the amount of microwave energy emitted by the microwave transmitter 1: the light emitting diode 212 rotates with the rotation of the transmission shaft 4, and the photoelectric sensor 103 receives a light signal every time it rotates. The processor 102 processes the signal of the photoelectric sensor 103 to obtain the rotation speed of the transmission shaft 4, and controls the power regulator 104 based on the processing result. The power regulator 104 controls the amount of energy output by the microwave source 105 to ensure that the microwave receiving antenna 201 can receive sufficient microwave energy to power the torsional vibration signal acquisition and transmission unit 2 at any rotation speed of the transmission shaft 4. The torsional vibration signal monitoring process of the rolling mill is described as follows: the strain gauge 203 is welded to the pre-monitoring position of the rolling mill drive shaft 4 by a simple electric welding machine. When the drive shaft 4 is working, it is slightly deformed by force, causing the strain gauge 203 to deform, thereby causing the current of each part in the strain bridge 204 to change. After the change signal is filtered and amplified by the filter amplifier 207, a signal of the change of the strain gauge 203 is obtained. After the signal is converted from analog to digital after passing through the A / D converter 208, the monitored digital signal is remotely transmitted to the wireless receiver 301 through the wireless transmitter 209. At this time, the monitoring signal can be monitored in real time on the portable display 302 or the all-in-one machine 303, so as to analyze the torsional vibration signal at the monitoring position. At the same time, the monitoring personnel can set the threshold of the torsional vibration signal according to the monitoring position. When the torsional vibration signal is higher than the set threshold, the alarm function is triggered to remind the monitoring personnel that the drive shaft is deformed or the rolling mill vibration is too large, so as to timely perform equipment maintenance and rolling process adjustment to improve product production quality.

[0077] The monitoring device of the present invention not only has stable power supply, convenient installation and easy maintenance, but also can be applied to the torsional vibration signal monitoring of most rotating shafts, which greatly facilitates on-site monitoring and use.

[0078] Although several embodiments of the present invention have been given herein, those skilled in the art should understand that the embodiments of the present invention may be modified without departing from the spirit of the present invention. The above embodiments are merely exemplary and should not be used as a limitation on the scope of the present invention.

Claims

1. A rolling mill torsional vibration telemetry device based on wireless power supply, characterized in that: The device comprises: a microwave transmitter, a torsional vibration signal acquisition and transmission unit and a torsional vibration signal receiving unit; The microwave transmitter is used to provide microwave energy to the torsional vibration signal acquisition and transmission unit; The torsional vibration signal collection and transmission unit receives the microwave energy provided by the microwave transmitter and converts it into electrical energy. Driven by the converted electrical energy, the torsional vibration signal of the rolling mill drive shaft is collected and transmitted to the torsional vibration signal receiving unit. The torsional vibration signal receiving unit is used to receive and process the torsional vibration signal collected by the torsional vibration signal collecting and transmitting unit; The torsional vibration signal acquisition and transmission unit is installed on the rolling mill transmission shaft.

2. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 1, characterized in that: The torsional vibration signal acquisition and transmission unit includes a torque ring, a microwave receiving antenna, a rectifier circuit, a voltage stabilization module, a strain gauge, a strain bridge, a filter amplifier, an A / D converter, a wireless transmitter, a bridge power supply and a light emitting diode; The microwave receiving antenna, the rectifier circuit, and the voltage stabilizing module are connected in sequence; after the microwave receiving antenna receives microwave energy, it is converted into electrical energy through the rectifier circuit, and a stable voltage is provided through the voltage stabilizing module; The strain gauge, strain bridge, filter amplifier, A / D converter, and wireless transmitter are connected in sequence; the torsional vibration signal collected by the strain gauge is converted into an electrical signal after passing through the strain bridge, and then filtered and amplified by the filter amplifier, and then converted from an analog signal to a digital signal after passing through the A / D converter, and then the processed digital signal is transmitted to the torsional vibration signal receiving unit through the wireless transmitter; The voltage stabilizing module is respectively connected to the bridge power supply, the filter amplifier, the wireless transmitter, and the light emitting diode, and the bridge power supply is connected to the strain bridge; the voltage stabilizing module is respectively powered by the bridge power supply, the filter amplifier, the wireless transmitter, and the light emitting diode, and the bridge power supply is powered by the strain bridge; the light emitting diode is used to transmit an optical signal to the photoelectric sensor of the microwave transmitter; The torsional vibration signal acquisition and transmission unit is arranged on the torque ring, and the torque ring is fixedly mounted on the rolling mill transmission shaft.

3. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 2, characterized in that: The torque ring is a circular ring structure with a certain thickness, which is fixed to the rolling mill drive shaft by bolts; the microwave receiving antenna is a plurality of flat-plate antennas, which are all arranged on the side along the thickness direction of the torque ring and are evenly arranged along the circumferential direction of the torque ring; the light-emitting diode is installed on one side of the microwave receiving antenna.

4. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 2, characterized in that: The strain gauge is welded on the rolling mill transmission shaft, and a recessed portion is arranged at a position on the inner side of the torque ring corresponding to the strain gauge.

5. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 2, characterized in that: The microwave transmitter includes an AC / DC power supply, a processor, a photoelectric sensor, a power regulator, a microwave source, a fixing plate, and a fixing base; The processor is respectively connected to the AC / DC power supply, the photoelectric sensor, and the power regulator, the power regulator is connected to the microwave source, and the photoelectric sensor is used to receive the light signal of the light emitting diode; The power regulator controls the microwave source to emit energy according to the photoelectric sensor signal; The microwave source is arranged on a fixing plate, and the fixing plate is mounted on the fixing base; The upper part of the fixed plate is provided with a concave surface with a certain curvature, and the concave surface corresponds to the rolling mill drive shaft; the microwave sources are multiple and dispersedly arranged along the concave surface of the fixed plate.

6. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 5, characterized in that: There are 5 to 7 microwave sources, the installation position of the microwave sources is a concave curved surface, and the distance between each microwave source and the rolling mill transmission shaft is equal.

7. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 5 or 6, characterized in that: The fixing plate is arranged on a side of the torque ring where the microwave receiving antenna is located, and is kept at a certain distance.

8. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 1, characterized in that: The torsional vibration signal receiving unit comprises a wireless receiver, a portable display and an all-in-one machine, and the wireless receiver is connected to the portable display and / or the all-in-one machine.

9. The rolling mill torsional vibration telemetry device based on wireless power supply according to claim 8, characterized in that: The integrated machine is provided with an alarm function, and when the torsional vibration signal detected is higher than a set threshold, the alarm is triggered.

10. A rolling mill torsional vibration telemetry method based on wireless power supply, characterized in that: The method uses the device according to any one of claims 1 to 9, and the method comprises: S1. Install a torsional vibration signal acquisition and transmission unit on the torque ring, wherein a plurality of microwave receiving antennas are evenly installed on the side of the torque ring along the thickness direction, and a strain gauge is arranged on the inner side of the torque ring and fixed on the rolling mill transmission shaft; S2, mounting the microwave transmitter on a fixed plate, the fixed plate being fixed on a fixed base, and the multiple microwave sources of the microwave transmitter being equidistant from the torque ring; S3. After installation, the rolling mill is working, the rolling mill drive shaft rotates at high speed, the AC / DC power supply of the microwave transmitter is turned on, the microwave source emits microwaves, and the microwave receiving antenna receives the microwave energy and converts it into electrical energy through the rectifier circuit, and provides a stable voltage through the voltage stabilizing module; the photoelectric sensor receives the light signal of the light emitting diode, measures the speed of the rolling mill drive shaft, and controls the power regulator through the processor to adjust the microwave source to emit microwave energy according to the measured speed; the strain gauge collects the torsional vibration signal of the rolling mill drive shaft, converts it into an electrical signal after passing through the strain bridge, and then filters and amplifies it through the filter amplifier, and then converts it from an analog signal to a digital signal after passing through the A / D converter, and then transmits the processed digital signal to the wireless receiver of the torsional vibration signal receiving unit through the wireless transmitter; after receiving the torsional vibration signal, the wireless receiver transmits it to the portable display or all-in-one machine for display or alarm.

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