A wireless power transmission vibration sensor for monitoring the vibration of the generator mirror plate

Abstract

The present invention relates to the technical field of vibration measurement, and discloses a wireless energy transmission vibration sensor for generator mirror plate vibration monitoring, which includes a heat insulation and protection mechanism and a transmitting circuit module. Inside the heat insulation and protection mechanism, a collection mechanism, a wireless module, a receiving circuit module, a signal processing unit, and a magnetostrictive actuator are respectively arranged. The wireless module is arranged at the output end of the collection mechanism, and the receiving circuit module is respectively arranged at the input end of the wireless module and the input end of the signal processing unit. This wireless energy transmission vibration sensor for generator mirror plate vibration monitoring can control the resonance frequency through the magnetostrictive actuator during use. That is, relying on the characteristic that the magnetostrictive rod elongates or shortens in the magnetization direction when magnetized, the coupling capacitor is adjusted through the magnetostrictive actuator, and then the resonance frequency is adjusted, thereby achieving self-tuning and ensuring efficient transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration measurement, and particularly to a wireless power transmission vibration sensor for monitoring the vibration of a generator mirror plate. Background Art

[0002] Wireless power transmission, also known as wireless power transfer and non-contact power transmission, refers to a transmission method in which electrical energy is converted into other forms of relay energy by a transmitter, transmitted over a certain distance through the air, and then converted back into electrical energy by a receiver to achieve wireless power transmission. Compared with traditional wired energy transmission technologies, wireless energy transmission has obvious advantages. First of all, it is not limited by the length of wires, allowing for flexible adjustment of the positions between the power source and the electrical equipment, and is suitable for various power consumption scenarios. Secondly, the wireless charging system improves the safety of power consumption because no wires are used, reducing potential hazards such as electric sparks, and thus can be safely used in production and living environments. Finally, the wireless energy transmission system usually consists of multiple modules, which is convenient for maintenance.

[0003] In the prior art, the vibration monitoring of a water turbine mirror plate usually relies on wired sensors, which face many challenges during installation and wiring, especially difficult to be flexibly deployed in narrow and complex environments. If the sensors can solve the above problems through wireless power transmission, while general wireless power transmission devices are difficult to perform dynamic compensation self-tuning control when the resonance frequency shifts, making it difficult to ensure efficient transmission. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a wireless power transmission vibration sensor for monitoring the vibration of a generator mirror plate, which solves the problems mentioned in the above background.

[0005] The present invention provides the following technical solution: A wireless power transmission vibration sensor for monitoring the vibration of a generator mirror plate, comprising: a heat insulation and protection mechanism and a transmitting circuit module. Inside the heat insulation and protection mechanism, a collection mechanism, a wireless module, a receiving circuit module, a signal processing unit, and a magnetostrictive actuator are respectively arranged. The wireless module is arranged at the output end of the collection mechanism, the receiving circuit module is respectively arranged at the input end of the wireless module and the input end of the signal processing unit, the magnetostrictive actuator is arranged at the input end of the receiving circuit module, and a heat dissipation and shielding mechanism is installed on the surface of the heat insulation and protection mechanism.

[0006] Preferably, the heat insulation and protection mechanism includes a housing, a sealing plate, a signal passing plate, a lifting frame, and a support piece. The sealing plate is fixedly connected to the inner wall of one side of the housing, the signal passing plate is fixedly connected to the inside of the sealing plate, the lifting frame is fixedly connected to the bottom of the housing, and the support piece is integrally arranged on the inner wall of the lifting frame.

[0007] Preferably, the acquisition mechanism includes a connection base, a guide slide column, electrode plates, connection pieces, and an elastic band. There are two connection bases, both of which are fixedly connected to the inner wall of the housing, and the two connection bases are distributed oppositely. The guide slide column is fixedly inserted between the two connection bases. The electrode plates are respectively fixedly installed on the inner walls of the two connection bases, and the two electrode plates are distributed in parallel. The connection pieces are fixedly connected between the two connection bases. The elastic band is fixedly connected to the middle of the connection piece, and both electrode plates are electrically connected to the wireless module.

[0008] Preferably, the acquisition mechanism further includes a lifting frame, a sliding hole, and a mass block. The lifting frame is slidably connected to the surface of the guide slide column through the sliding hole, and one end of the elastic band is fixedly connected to the surface of the lifting frame. The mass block is fixedly connected to the inside of the lifting frame, and the mass block is located between the two electrode plates.

[0009] Preferably, the receiving circuit module includes a receiving coil, a coupling capacitor, and an input resistor. The receiving coil, the coupling capacitor, and the input resistor form a resonant circuit. The receiving coil is wirelessly connected to the transmitting circuit module, and the receiving coil is located on one side of the signal passing board.

[0010] Preferably, the coupling capacitor includes a support shell, a sliding ring, a constant voltage diaphragm, an insulating shell, and a connection block. The support shell is fixedly connected to the inner wall of the housing. The sliding ring is fixedly connected to the inner wall of one end of the support shell. The constant voltage diaphragm is fixedly connected to the surface of the support shell. The insulating shell is installed inside the support shell. The connection block is integrally connected to the surface of the insulating shell, and the surface of the connection block is fixedly connected to the inner wall of the support shell.

[0011] Preferably, the coupling capacitor further includes an electrode ring, a capacitive medium, and an electrode column. The electrode ring is fixedly connected to the inside of the insulating shell. The capacitive medium is fixedly connected to the inner wall of the electrode ring. The electrode column is slidably connected to the inner wall of the capacitive medium, and the surface of the electrode column is slidably connected to the inner wall of the sliding ring.

[0012] Preferably, the signal processing unit includes a current sampling module, a zero-crossing comparison module, a phase-locked loop module, and a drive circuit module. The current sampling module is fixedly installed at the output end of the receiving circuit module. The zero-crossing comparison module is fixedly installed at the output end of the current sampling module. The phase-locked loop module is fixedly installed at the output end of the zero-crossing comparison module. The drive circuit module is fixedly installed at the output end of the phase-locked loop module.

[0013] Preferably, the magnetostrictive actuator includes a housing, a pre-tightening seat, a cover ring, a permanent magnet ring, an adjustment coil, a magnetostrictive rod, a sliding contact post, and a connecting sleeve. The housing is fixedly connected to the inner wall of the machine case. The pre-tightening seat and the cover ring are respectively fixedly connected to the inner walls at both ends of the housing. The permanent magnet ring is fixedly connected to the inner wall of the housing. The adjustment coil is fixedly connected to the inner wall of the permanent magnet ring. The magnetostrictive rod is fixedly inserted into one side of the pre-tightening seat, and the magnetostrictive rod is located inside the adjustment coil. The sliding contact post is fixedly connected to the end of the magnetostrictive rod away from the pre-tightening seat, and the surface of the sliding contact post is slidably connected to the inner wall of the cover ring. The connecting sleeve is fixedly sleeved on the surface of the end of the sliding contact post away from the magnetostrictive rod, and the inner wall of the connecting sleeve is fixedly connected to one end of the electrode post close to the slip ring. And the expansion and contraction path of the magnetostrictive rod is vertically distributed with the sliding path of the mass block.

[0014] Preferably, the heat dissipation and shielding mechanism includes a metal shielding case, a wind guiding frame, heat dissipation fins, and wind guiding grooves. The metal shielding case is fixedly inserted into the interior of the machine case, and the metal shielding case is located on one side of the receiving coil. The wind guiding frame is fixedly connected to the interior of the metal shielding case. The heat dissipation fins are integrally arranged on the inner wall of the metal shielding case. The wind guiding grooves are opened around the wind guiding frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can control the resonance frequency through the magnetostrictive actuator during use. That is, relying on the characteristic that the magnetostrictive rod elongates or shortens in the magnetization direction when magnetized, the coupling capacitance is adjusted through the magnetostrictive actuator, and then the resonance frequency is adjusted, so as to achieve self-tuning and ensure efficient transmission. This is achieved by the set heat insulation and protection mechanism, transmitting circuit module, acquisition mechanism, wireless module, receiving circuit module, signal processing unit, magnetostrictive actuator, and heat dissipation and shielding mechanism.

[0017] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can form a lift and gap between the device and the generator through the set machine case, sealing plate, signal passing plate, lifting frame, and support piece, reducing the heat conduction from the motor housing and avoiding overheating inside the device.

[0018] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can convert the up and down sliding signal of the mass block into a capacitance voltage change signal between the plates during vibration through the set connecting seat, guide sliding column, electrode plate, connecting piece, elastic band, lifting frame, sliding hole, and mass block, so as to facilitate external transmission through the wireless module.

[0019] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can utilize the electric energy generated by the hydrogenerator through the set transmitting circuit module, receiving coil, coupling capacitor, and input resistor, without the need for an additional independent power source. Moreover, the adopted wireless power transmission method eliminates the dependence on wired power sources, simplifies the installation and maintenance processes, and is particularly suitable for deployment in narrow or complex environments.

[0020] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can facilitate changing the capacitance between the electrode column and the electrode ring by the telescoping of the electrode column through the set support shell, slip ring, constant pressure diaphragm, insulating shell, connecting block, electrode ring, capacitive medium, and electrode column. Thus, it is convenient to adjust the resonance frequency of the resonance circuit according to requirements by changing the telescoping of the electrode column. Meanwhile, through the settings of the support shell and the constant pressure diaphragm, it can compensate for the internal negative pressure when the electrode column telescopes and form a protection for the inside of the support shell.

[0021] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can monitor whether the system is in a detuned state through the set current sampling module, zero-crossing comparison module, phase-locked loop module, and drive circuit module, and control the magnetostrictive actuator to perform adjustment feedback to ensure efficient energy transmission under different working conditions, thereby improving the stability and reliability of the system.

[0022] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can change the telescoping amount of the magnetostrictive rod through the adjustment coil through the set sleeve, pre-tightening seat, cover ring, permanent magnet ring, adjustment coil, magnetostrictive rod, sliding contact column, and connecting sleeve, convert the current signal of the drive circuit module into the mechanical movement of the telescoping of the magnetostrictive rod, and then drive the change of the coupling capacitor, thereby realizing resonance adjustment. Meanwhile, through the perpendicular distribution of the telescoping path of the magnetostrictive rod and the sliding path of the mass block, it can reduce the influence of the sliding and bouncing of the mass block on the coupling capacitor.

[0023] The wireless power transmission vibration sensor for generator mirror plate vibration monitoring can block the inside of the receiving coil through the metal shielding shell during use, reduce the influence of the internal magnetic field change of the adjustment coil on the receiving coil, and at the same time introduce the passing cold air into the shielding shell through the air guide groove to exchange heat with the heat sink to achieve heat dissipation. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the present invention;

[0025] Figure 2 It is a connection diagram of the internal system of the present invention;

[0026] Figure 3 It is a schematic connection diagram of the receiving circuit module of the present invention;

[0027] Figure 4 This is the bottom view of the present invention;

[0028] Figure 5 This is the schematic diagram of the internal structure of the heat insulation and protection mechanism of the present invention;

[0029] Figure 6 This is the schematic diagram of the connection structure between the coupling capacitor and the magnetostrictive actuator of the present invention;

[0030] Figure 7 This is the cross-sectional view of the connection structure between the coupling capacitor and the magnetostrictive actuator of the present invention;

[0031] Figure 8 This is the schematic diagram of the internal explosion structure of the coupling capacitor of the present invention;

[0032] Figure 9 This is the schematic diagram of the structure of the heat dissipation shielding mechanism of the present invention;

[0033] Figure 10 This is the schematic diagram of the structure of the acquisition mechanism of the present invention;

[0034] Figure 11 This is the cross-sectional view of the acquisition mechanism of the present invention.

[0035] In the figure: 101, housing; 102, sealing plate; 103, signal passing board; 104, lifting frame; 105, support piece; 201, connecting seat; 202, guide sliding column; 203, electrode plate; 204, connecting piece; 205, elastic band; 206, lifting frame; 207, sliding hole; 208, mass block; 301, receiving coil; 302, coupling capacitor; 303, input resistor; 304, support shell; 305, slip ring; 306, constant pressure diaphragm; 307, insulating shell; 308, connecting block; 309, electrode ring; 310, capacitor dielectric; 311, electrode column; 401, current sampling module; 402, zero-crossing comparison module; 403, phase-locked loop module; 404, drive circuit module; 501, sleeve; 502, pre-tightening seat; 503, cover ring; 504, permanent magnet ring; 505, adjusting coil; 506, magnetostrictive rod; 507, sliding contact column; 508, connecting sleeve; 601, metal shielding shell; 602, air guiding frame; 603, heat sink; 604, air guiding groove. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1-11 , a wireless power transmission vibration sensor for monitoring the vibration of the mirror plate of a generator, comprising: a heat insulation and protection mechanism and a transmitting circuit module. An acquisition mechanism, a wireless module, a receiving circuit module, a signal processing unit and a magnetostrictive actuator are respectively arranged inside the heat insulation and protection mechanism. The wireless module is arranged at the output end of the acquisition mechanism. The receiving circuit module is respectively arranged at the input end of the wireless module and the input end of the signal processing unit. The magnetostrictive actuator is arranged at the input end of the receiving circuit module. A heat dissipation and shielding mechanism is installed on the surface of the heat insulation and protection mechanism. By arranging the heat insulation and protection mechanism, the transmitting circuit module, the acquisition mechanism, the wireless module, the receiving circuit module, the signal processing unit, the magnetostrictive actuator and the heat dissipation and shielding mechanism, the resonant frequency can be controlled by the magnetostrictive actuator during use, that is, relying on the characteristic that the magnetostrictive rod 506 elongates or shortens in the magnetization direction when magnetized, the coupling capacitor 302 is adjusted by the magnetostrictive actuator, and then the resonant frequency is adjusted, so as to achieve self-tuning and ensure efficient transmission.

[0038] Among them; the heat insulation and protection mechanism includes a housing 101, a sealing plate 102, a signal passing plate 103, a lifting frame 104 and a support piece 105. The sealing plate 102 is fixedly connected to the inner wall of one side of the housing 101. The signal passing plate 103 is fixedly connected to the inside of the sealing plate 102. The lifting frame 104 is fixedly connected to the bottom of the housing 101. The support piece 105 is integrally arranged on the inner wall of the lifting frame 104. By arranging the housing 101, the sealing plate 102, the signal passing plate 103, the lifting frame 104 and the support piece 105, a lift and a gap can be formed between the device and the generator, reducing the heat conduction from the motor housing and avoiding overheating inside the device.

[0039] Among them; the acquisition mechanism includes a connecting seat 201, a guide sliding column 202, a pole plate 203, a connecting piece 204 and an elastic band 205. The number of the connecting seats 201 is two, and both of the two connecting seats 201 are fixedly connected to the inner wall of the housing 101 and are distributed oppositely. The guide sliding column 202 is fixedly inserted between the two connecting seats 201. The pole plates 203 are respectively fixedly installed on the inner walls of the two connecting seats 201, and the two pole plates 203 are distributed in parallel. The connecting piece 204 is fixedly connected between the two connecting seats 201. The elastic band 205 is fixedly connected to the middle of the connecting piece 204, and both of the two pole plates 203 are electrically connected to the wireless module.

[0040] Among them; the acquisition mechanism further includes a lifting frame 206, a sliding hole 207, and a mass block 208. The lifting frame 206 is slidably connected to the surface of the guide slide post 202 through the sliding hole 207, and one end of the elastic band 205 is fixedly connected to the surface of the lifting frame 206. The mass block 208 is fixedly connected inside the lifting frame 206, and the mass block 208 is located between the two electrodes 203. By providing the connecting seat 201, the guide slide post 202, the electrodes 203, the connecting piece 204, the elastic band 205, the lifting frame 206, the sliding hole 207, and the mass block 208, the up-and-down sliding signal of the mass block 208 can be converted into a capacitance voltage change signal between the electrodes 203 during vibration, so as to facilitate external transmission through the wireless module.

[0041] Among them; the receiving circuit module includes a receiving coil 301, a coupling capacitor 302, and an input resistor 303. The receiving coil 301, the coupling capacitor 302, and the input resistor 303 form a resonant circuit. The receiving coil 301 is wirelessly connected to the transmitting circuit module, and the receiving coil 301 is located on one side of the signal passing board 103. By providing the transmitting circuit module, the receiving coil 301, the coupling capacitor 302, and the input resistor 303, the electric energy generated by the water turbine generator can be used without an additional independent power supply, and the wireless power transmission method adopted eliminates the dependence on the wired power supply, simplifies the installation and maintenance process, and is particularly suitable for deployment in narrow or complex environments.

[0042] Among them; the coupling capacitor 302 includes a support shell 304, a slip ring 305, a constant voltage diaphragm 306, an insulating shell 307, and a connecting block 308. The support shell 304 is fixedly connected to the inner wall of the housing 101. The slip ring 305 is fixedly connected to the inner wall of one end of the support shell 304. The constant voltage diaphragm 306 is fixedly connected to the surface of the support shell 304. The insulating shell 307 is installed inside the support shell 304. The connecting block 308 is integrally connected to the surface of the insulating shell 307, and the surface of the connecting block 308 is fixedly connected to the inner wall of the support shell 304.

[0043] Among them; the coupling capacitor 302 further includes an electrode ring 309, a capacitive dielectric 310, and an electrode post 311. The electrode ring 309 is fixedly connected to the inside of the insulating shell 307. The capacitive dielectric 310 is fixedly connected to the inner wall of the electrode ring 309. The electrode post 311 is slidably connected to the inner wall of the capacitive dielectric 310, and the surface of the electrode post 311 is slidably connected to the inner wall of the slip ring 305. By providing the support shell 304, the slip ring 305, the constant pressure diaphragm 306, the insulating shell 307, the connecting block 308, the electrode ring 309, the capacitive dielectric 310, and the electrode post 311, it is possible to facilitate changing the capacitance between the electrode post 311 and the electrode ring 309 by the expansion and contraction of the electrode post 311, so as to conveniently adjust the resonant frequency of the resonant circuit according to requirements by changing the expansion and contraction of the electrode post 311. At the same time, by providing the support shell 304 and the constant pressure diaphragm 306, it is possible to compensate for the negative pressure inside when the electrode post 311 expands and contracts, and at the same time form a protection for the inside of the support shell 304.

[0044] Among them; the signal processing unit includes a current sampling module 401, a zero-crossing comparison module 402, a phase-locked loop module 403, and a drive circuit module 404. The current sampling module 401 is fixedly installed at the output end of the receiving circuit module. The zero-crossing comparison module 402 is fixedly installed at the output end of the current sampling module 401. The phase-locked loop module 403 is fixedly installed at the output end of the zero-crossing comparison module 402. The drive circuit module 404 is fixedly installed at the output end of the phase-locked loop module 403. By providing the current sampling module 401, the zero-crossing comparison module 402, the phase-locked loop module 403, and the drive circuit module 404, it is possible to monitor whether the system is in a detuned state and control the magnetostrictive actuator to perform adjustment and feedback to ensure efficient energy transmission under different working conditions, thereby improving the stability and reliability of the system.

[0045] Among them, the magnetostrictive actuator includes a housing 501, a pre-tightening seat 502, a cover ring 503, a permanent magnet ring 504, an adjustment coil 505, a magnetostrictive rod 506, a sliding contact post 507, and a connecting sleeve 508. The housing 501 is fixedly connected to the inner wall of the machine housing 101. The pre-tightening seat 502 and the cover ring 503 are respectively fixedly connected to the inner walls at both ends of the housing 501. The permanent magnet ring 504 is fixedly connected to the inner wall of the housing 501. The adjustment coil 505 is fixedly connected to the inner wall of the permanent magnet ring 504. The magnetostrictive rod 506 is fixedly inserted on one side of the pre-tightening seat 502, and the magnetostrictive rod 506 is located inside the adjustment coil 505. The sliding contact post 507 is fixedly connected to the end of the magnetostrictive rod 506 away from the pre-tightening seat 502, and the surface of the sliding contact post 507 is slidably connected to the inner wall of the cover ring 503. The connecting sleeve 508 is fixedly sleeved on the surface of the end of the sliding contact post 507 away from the magnetostrictive rod 506, and the inner wall of the connecting sleeve 508 is fixedly connected to one end of the electrode post 311 close to the slip ring 305. And the telescopic path of the magnetostrictive rod 506 is vertically distributed with respect to the sliding path of the mass block 208. By providing the housing 501, the pre-tightening seat 502, the cover ring 503, the permanent magnet ring 504, the adjustment coil 505, the magnetostrictive rod 506, the sliding contact post 507, and the connecting sleeve 508, the telescopic amount of the magnetostrictive rod 506 can be changed through the adjustment coil 505, converting the current signal of the drive circuit module 404 into the mechanical movement of the telescopic of the magnetostrictive rod 506, and then driving the change of the coupling capacitor 302, so as to realize resonance adjustment. At the same time, through the vertical distribution of the telescopic path of the magnetostrictive rod 506 and the sliding path of the mass block 208, the influence of the sliding jump of the mass block 208 on the coupling capacitor 302 can be reduced. Magnetostriction refers to the fact that when an object is magnetized in a magnetic field, it will elongate or shorten in the magnetization direction. When the current passing through the coil changes or the distance from the magnet changes, its size will change significantly. Such ferromagnetic materials are usually called ferromagnetic magnetostrictive materials. Their size change is much larger than that of magnetostrictive materials such as ferrites, and the energy generated is also large, so they are called giant magnetostrictive materials. The material of the magnetostrictive rod 506 is a ferromagnetic magnetostrictive material.

[0046] Among them, the heat dissipation shielding mechanism includes a metal shielding case 601, a wind guiding frame 602, heat sinks 603 and wind guiding grooves 604. The metal shielding case 601 is fixedly inserted inside the machine case 101, and the metal shielding case 601 is located on one side of the receiving coil 301. The wind guiding frame 602 is fixedly connected inside the metal shielding case 601. The heat sinks 603 are integrally arranged on the inner wall of the metal shielding case 601. The wind guiding grooves 604 are opened around the wind guiding frame 602. By providing the metal shielding case 601, the wind guiding frame 602, the heat sinks 603 and the wind guiding grooves 604, when in use, the inner side of the receiving coil 301 can be shielded by the metal shielding case 601, reducing the influence of the internal magnetic field change of the adjusting coil 505 on the receiving coil 301. At the same time, the cold air passing through is introduced into the shielding case 601 through the wind guiding grooves 604 to exchange heat with the heat sinks 603 to achieve heat dissipation.

[0047] Working principle:

[0048] During installation, the transmitting circuit module is installed on the hydrogenerator and electrically connected thereto. The machine case 101 is installed at the designated position of the hydrogenerator mirror plate, ensuring that the vibration direction of the mass block 208 is parallel to the vibration direction of the hydrogenerator mirror plate, and at the same time ensuring that the transmitting circuit module corresponds to the receiving coil 301;

[0049] During use, the transmitting circuit module converts the electrical energy generated by the hydrogenerator into an alternating voltage of a specific frequency through the transmitting circuit, then resonates out a high-frequency current, and then induces a current in the resonant circuit composed of the receiving coil 301, the coupling capacitor 302 and the input resistor 303. To determine whether the receiving circuit is in a resonant state, the system collects the current signal of the resonant circuit through the current sampling module 401. The zero-crossing comparison module 402 converts the current signal into a square wave signal with the same frequency and phase. The phase-locked loop module 403 compares the phase of the square wave signal with the feedback signal, determines the working state of the receiving circuit according to the comparison result, and generates a corresponding logic signal. When the working frequency of the receiving circuit differs greatly from the resonant frequency, the logic signal controls the magnetostrictive actuator to extend or contract through the drive circuit module 404. The extension or contraction of the magnetostrictive actuator can control the capacitance value of the coupling capacitor 302 to increase or decrease, thereby changing the working frequency of the resonant circuit to make it reach the resonant frequency, realizing the dynamic compensation self-tuning control of the circuit, and ensuring the efficient transmission of electrical energy;

[0050] The transmitted electrical energy powers the wireless module. When vibration occurs, the mass block 208 slides up and down along the guide post 202. At this time, the capacitance value between the two plates 203 changes. The plates 203 transmit the change signal of the capacitance value to the outside through the wireless module, thereby obtaining the vibration information of the mirror plate;

[0051] Since the alternating magnetic field generated by the adjustment coil 505 is superimposed on the bias magnetic field provided by the permanent magnet ring 504 to form a driving magnetic field, when controlling the change of the capacitance value of the coupling capacitor 302, first control the current magnitude of the adjustment coil 505, and then change the magnitude of the driving magnetic field. After the driving magnetic field changes, the magnetostrictive rod 506 will generate deformation, forming elongation or shortening. The elongated or shortened magnetostrictive rod 506 will drive the electrode post 311 to contract or extend through the sliding contact column 507, thereby changing the capacitance value between the electrode post 311 and the electrode ring 309, and realizing the change of the operating frequency of the resonant circuit.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless energy transmission vibration sensor for monitoring the vibration of the generator mirror plate, characterized in that, Including: A heat insulation and protection mechanism and a transmitting circuit module. Inside the heat insulation and protection mechanism, a collection mechanism, a wireless module, a receiving circuit module, a signal processing unit, and a magnetostrictive actuator are respectively arranged. The wireless module is arranged at the output end of the collection mechanism. The receiving circuit module is respectively arranged at the input end of the wireless module and the input end of the signal processing unit. The magnetostrictive actuator is arranged at the input end of the receiving circuit module. A heat dissipation and shielding mechanism is installed on the surface of the heat insulation and protection mechanism; The heat insulation and protection mechanism includes a casing (101), a sealing plate (102), a signal passing plate (103), a lifting frame (104), and a support piece (105). The sealing plate (102) is fixedly connected to the inner wall of one side of the casing (101). The signal passing plate (103) is fixedly connected to the inside of the sealing plate (102). The lifting frame (104) is fixedly connected to the bottom of the casing (101). The support piece (105) is integrally arranged on the inner wall of the lifting frame (104); The receiving circuit module includes a receiving coil (301), a coupling capacitor (302), and an input resistor (303). The receiving coil (301), the coupling capacitor (302), and the input resistor (303) form a resonant circuit. The receiving coil (301) is wirelessly connected to the transmitting circuit module. The receiving coil (301) is located on one side of the signal passing plate (103); The coupling capacitor (302) includes a support shell (304), a slip ring (305), a constant voltage diaphragm (306), an insulating shell (307), and a connecting block (308). The support shell (304) is fixedly connected to the inner wall of the casing (101). The slip ring (305) is fixedly connected to the inner wall of one end of the support shell (304). The constant voltage diaphragm (306) is fixedly connected to the surface of the support shell (304). The insulating shell (307) is installed inside the support shell (304). The connecting block (308) is integrally connected to the surface of the insulating shell (307), and the surface of the connecting block (308) is fixedly connected to the inner wall of the support shell (304); The coupling capacitor (302) further includes an electrode ring (309), a capacitive medium (310), and an electrode post (311). The electrode ring (309) is fixedly connected to the inside of the insulating shell (307). The capacitive medium (310) is fixedly connected to the inner wall of the electrode ring (309). The electrode post (311) is slidably connected to the inner wall of the capacitive medium (310), and the surface of the electrode post (311) is slidably connected to the inner wall of the slip ring (305); The magnetostrictive actuator includes a housing (501), a pre-tightening seat (502), a cover ring (503), a permanent magnet ring (504), an adjustment coil (505), a magnetostrictive rod (506), a sliding contact post (507), and a connecting sleeve (508). The housing (501) is fixedly connected to the inner wall of the machine housing (101). The pre-tightening seat (502) and the cover ring (503) are respectively fixedly connected to the inner walls at both ends of the housing (501). The permanent magnet ring (504) is fixedly connected to the inner wall of the housing (501). The adjustment coil (505) is fixedly connected to the inner wall of the permanent magnet ring (504). The magnetostrictive rod (506) is fixedly inserted on one side of the pre-tightening seat (502), and the magnetostrictive rod (506) is located inside the adjustment coil (505). The sliding contact post (507) is fixedly connected to the end of the magnetostrictive rod (506) away from the pre-tightening seat (502), and the surface of the sliding contact post (507) is slidably connected to the inner wall of the cover ring (503). The connecting sleeve (508) is fixedly sleeved on the surface of the end of the sliding contact post (507) away from the magnetostrictive rod (506), and the inner wall of the connecting sleeve (508) is fixedly connected to one end of the electrode post (311) close to the slip ring (305). The telescopic path of the magnetostrictive rod (506) is vertically distributed with respect to the sliding path of the mass block (208).

2. The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 1, characterized in that The acquisition mechanism includes a connecting seat (201), a guide sliding column (202), a pole plate (203), a connecting piece (204), and an elastic band (205). The number of the connecting seats (201) is two, and both of the two connecting seats (201) are fixedly connected to the inner wall of the machine housing (101), and the two connecting seats (201) are distributed oppositely. The guide sliding column (202) is fixedly inserted between the two connecting seats (201). The pole plates (203) are respectively fixedly installed on the inner walls of the two connecting seats (201), and the two pole plates (203) are distributed in parallel. The connecting piece (204) is fixedly connected between the two connecting seats (201). The elastic band (205) is fixedly connected to the middle of the connecting piece (204), and both of the two pole plates (203) are electrically connected to the wireless module.

3. The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 2, characterized in that, The acquisition mechanism further includes a lifting frame (206), a sliding hole (207), and a mass block (208). The lifting frame (206) is slidably connected to the surface of the guide sliding column (202) through the sliding hole (207), and the surface of the lifting frame (206) is fixedly connected to one end of the elastic band (205). The mass block (208) is fixedly connected to the inside of the lifting frame (206), and the mass block (208) is located between the two pole plates (203).

4. The wireless power transmission vibration sensor for generator mirror plate vibration monitoring according to claim 1, characterized in that The signal processing unit includes a current sampling module (401), a zero-crossing comparison module (402), a phase-locked loop module (403) and a drive circuit module (404). The current sampling module (401) is fixedly installed at the output end of the receiving circuit module. The zero-crossing comparison module (402) is fixedly installed at the output end of the current sampling module (401). The phase-locked loop module (403) is fixedly installed at the output end of the zero-crossing comparison module (402). The drive circuit module (404) is fixedly installed at the output end of the phase-locked loop module (403).

5. The wireless power transmission vibration sensor for generator mirror plate vibration monitoring according to claim 1, wherein The heat dissipation shielding mechanism includes a metal shielding case (601), a wind guide frame (602), a heat sink (603) and a wind guide groove (604). The metal shielding case (601) is fixedly inserted into the interior of the machine case (101), and the metal shielding case (601) is located on one side of the receiving coil (301). The wind guide frame (602) is fixedly connected to the interior of the metal shielding case (601). The heat sink (603) is integrally arranged on the inner wall of the metal shielding case (601). The wind guide groove (604) is formed around the wind guide frame (602).

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