Wireless energy transmission vibration sensor for monitoring vibration of generator runner plate

Abstract

The invention relates to the technical field of vibration measurement, and discloses a wireless energy transmission vibration sensor for vibration monitoring of a generator runner, which comprises a heat insulation and conduction protection mechanism and a transmitting circuit module, an acquisition mechanism, a wireless module, a receiving circuit module, a signal processing unit and a magnetostriction actuator are arranged in the heat insulation and conduction protection mechanism, the wireless module is arranged at the output end of the acquisition mechanism, and the receiving circuit module is arranged at the input end of the wireless module and the input end of the signal processing unit. According to the wireless energy transmission vibration sensor for generator runner vibration monitoring, the resonant frequency can be controlled through the magnetostriction actuator when the sensor is used, that is, the coupling capacitance is adjusted through the magnetostriction actuator according to the characteristic that the magnetostriction rod is stretched or shortened in the magnetization direction when being magnetized, and then the resonant frequency is adjusted; therefore, self-tuning is realized, and high-efficiency transmission is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of vibration measurement, and in particular to a wireless energy transmission vibration sensor used for vibration monitoring of a generator mirror plate. Background Art

[0002] Wireless power transmission, also known as wireless power transmission or contactless power transmission, refers to the process of converting electrical energy into other forms of relay energy through a transmitter, transmitting it over a certain distance, and then converting the relay energy into electrical energy through a receiver to achieve wireless power transmission. Compared with traditional wired energy transmission technology, wireless energy transmission has obvious advantages. First, it is not limited by the length of the wire, allowing for flexible adjustment of the position between the power source and the power-consuming device, and is suitable for a variety of power usage occasions. Secondly, the wireless charging system improves the safety of power usage because no wires are used, reducing potential hazards such as electric sparks, so it can be used safely in production and living environments. Finally, the wireless energy transmission system is usually composed of multiple modules for easy maintenance.

[0003] In the prior art, turbine mirror plate vibration monitoring usually relies on wired sensors, which face many challenges during installation and wiring, especially in small spaces and complex environments where it is difficult to flexibly deploy them. If the sensors are transmitted via wireless power, the above problems can be well solved. However, general wireless power transmission equipment is difficult to perform dynamic compensation self-tuning control when the resonant frequency shifts, and it is difficult to ensure efficient transmission. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a wireless energy 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 energy transmission vibration sensor for monitoring vibration of a generator mirror plate, comprising: a heat-insulating protection mechanism and a transmitting circuit module, wherein a collection mechanism, a wireless module, a receiving circuit module, a signal processing unit and a magnetostrictive actuator are respectively arranged inside the heat-insulating protection mechanism, 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 shielding mechanism is installed on the surface of the heat-insulating protection mechanism.

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

[0007] Preferably, the acquisition mechanism includes a connecting seat, a guide slide, a pole plate, a connecting piece and an elastic band. There are two connecting seats, and both connecting seats are fixedly connected to the inner wall of the casing, and the two connecting seats are relatively distributed. The guide slide is fixedly inserted between the two connecting seats, the pole plates are respectively fixedly installed on the inner walls of the two connecting seats, and the two pole plates are distributed in parallel. The connecting piece is fixedly connected between the two connecting seats, the elastic band is fixedly connected in the middle of the connecting piece, and the two pole plates are electrically connected to the wireless module.

[0008] Preferably, the collection mechanism also 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 the surface of the lifting frame is fixedly connected to one end of the elastic band, the mass block is fixedly connected to the inside of the lifting frame, and the mass block is located between the two pole plates.

[0009] Preferably, the receiving circuit module includes a receiving coil, a coupling capacitor and an input resistor, and the receiving coil, the coupling capacitor and the input resistor form a resonant circuit, and 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 supporting shell, a slip ring, a constant voltage diaphragm, an insulating shell and a connecting block, the supporting shell is fixedly connected to the inner wall of the casing, the slip ring is fixedly connected to the inner wall of one end of the supporting shell, the constant voltage diaphragm is fixedly connected to the surface of the supporting shell, the insulating shell is installed inside the supporting shell, the connecting block is integrally connected to the surface of the insulating shell, and the surface of the connecting block is fixedly connected to the inner wall of the supporting shell.

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

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

[0013] Preferably, the magnetostrictive actuator comprises a casing, a preload seat, a cover ring, a permanent magnet ring, an adjustment coil, a magnetostrictive rod, a sliding column and a connecting sleeve, wherein the casing is fixedly connected to the inner wall of the casing, the preload seat and the cover ring are respectively fixedly connected to the inner walls at both ends of the casing, the permanent magnet ring is fixedly connected to the inner wall of the casing, the adjustment coil is fixedly connected to the inner wall of the permanent magnet ring, the magnetostrictive rod is fixedly plugged into one side of the preload seat, and the magnetostrictive rod is located inside the adjustment coil, the sliding column is fixedly connected to one end of the magnetostrictive rod away from the preload seat, and the surface of the sliding column 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 column away from the magnetostrictive rod, and the inner wall of the connecting sleeve is fixedly connected to one end of the electrode column close to the slip ring, and the telescopic path of the magnetostrictive rod is vertically distributed to the sliding path of the mass block.

[0014] Preferably, the heat dissipation shielding mechanism includes a metal shielding shell, an air guide frame, a heat sink and an air guide groove. The metal shielding shell is fixedly inserted into the interior of the casing, and the metal shielding shell is located on one side of the receiving coil. The air guide frame is fixedly connected to the interior of the metal shielding shell, the heat sink is integrally arranged on the inner wall of the metal shielding shell, and the air guide groove is opened around the air guide frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The wireless energy transmission vibration sensor for monitoring the vibration of the generator mirror plate can control the resonance frequency through the magnetostrictive actuator when in use by means of the heat insulation protection mechanism, the transmitting circuit module, the collecting mechanism, the wireless module, the receiving circuit module, the signal processing unit, the magnetostrictive actuator and the heat dissipation shielding mechanism. That is, the magnetostrictive actuator is used to adjust the coupling capacitance and then adjust the resonance frequency by relying on the elongation or shortening characteristics of the magnetostrictive rod in the magnetization direction when being magnetized, thereby realizing self-tuning and ensuring efficient transmission.

[0016] The wireless energy transmission vibration sensor for monitoring the vibration of the generator mirror plate can form a lift and a gap between the device and the generator through the provided casing, sealing plate, signal transmission plate, lifting frame and supporting plate, thereby reducing heat conduction from the motor casing and avoiding overheating inside the device.

[0017] The wireless energy transmission vibration sensor for monitoring the vibration of the generator mirror plate can convert the up and down sliding signal of the mass block into a capacitance voltage change signal between the pole plates during vibration through the arranged connecting seat, guide sliding column, pole plate, connecting piece, elastic belt, lifting frame, sliding hole and mass block, so as to facilitate external transmission through the wireless module.

[0018] The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring can use the electric energy generated by the hydro-turbine generator through the set transmitting circuit module, receiving coil, coupling capacitor and input resistor. It does not require an additional independent power supply. The wireless energy transmission method adopted eliminates the dependence on wired power supply, simplifies the installation and maintenance process, and is particularly suitable for deployment in small or complex environments.

[0019] The wireless energy transmission vibration sensor for monitoring the vibration of the generator mirror plate, through the provision of a support shell, a slip ring, a constant voltage diaphragm, an insulating shell, a connection block, an electrode ring, a capacitor medium and an electrode column, can facilitate the change of the capacitance between the electrode ring and the electrode ring by the expansion and contraction of the electrode column, so as to facilitate the adjustment of the resonant frequency of the resonant circuit by changing the expansion and contraction of the electrode column according to demand. At the same time, through the provision of the support shell and the constant voltage diaphragm, the internal negative pressure can be compensated when the electrode column is expanded and contracted, and the inside of the support shell can be protected.

[0020] The wireless energy transmission vibration sensor used 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 adjust feedback, ensuring efficient energy transmission under different working conditions, thereby improving the stability and reliability of the system.

[0021] The wireless energy transmission vibration sensor for monitoring the vibration of the generator mirror plate can change the extension and contraction amount of the magnetostrictive rod by adjusting the coil through the set casing, preload seat, cover ring, permanent magnet ring, adjustment coil, magnetostrictive rod, sliding column and connecting sleeve, convert the current signal of the driving circuit module into the mechanical movement of the magnetostrictive rod extension and contraction, thereby driving the coupling capacitor to change, thereby realizing resonance adjustment, and at the same time, through the vertical distribution of the extension and contraction path of the magnetostrictive rod and the sliding path of the mass block, the influence of the mass block on the coupling capacitor when sliding and jumping can be reduced.

[0022] The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring can shield the inner side of the receiving coil through the metal shielding shell when in use, thereby reducing the influence of the magnetic field change inside the regulating coil on the receiving coil, and at the same time, guide the passing cold air through the air guide slot to exchange heat between the shielding shell and the heat sink to achieve heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is the internal system connection diagram of the present invention; Figure 3 This is a connection diagram of the receiving circuit module of the present invention; Figure 4It is a bottom view of the present invention; Figure 5 This is a schematic diagram of the internal structure of the heat insulation protection mechanism of the present invention; Figure 6 This is a schematic diagram of the connection structure between the coupling capacitor and the magnetostrictive actuator of the present invention; Figure 7 It is a cross-sectional view of the connection structure between the coupling capacitor and the magnetostrictive actuator of the present invention; Figure 8 This is a schematic diagram of the internal explosion structure of the coupling capacitor of the present invention; Fig. 9 This is a schematic diagram of the heat dissipation shielding mechanism structure of the present invention; Fig.10 It is a schematic diagram of the structure of the collection mechanism of the present invention; Fig.11 It is a cross-sectional view of the collection mechanism of the present invention.

[0024] In the figure: 101, housing; 102, sealing plate; 103, signal passing plate; 104, lifting frame; 105, supporting plate; 201, connecting seat; 202, guide slide column; 203, plate; 204, connecting plate; 205, elastic band; 206, lifting frame; 207, sliding hole; 208, mass block; 301, receiving coil; 302, coupling capacitor; 303, input resistor; 304, supporting shell; 305, slip ring; 306, constant pressure diaphragm; 307, insulating shell; 308, connecting block; 309, electrode ring; 310, capacitor medium; 311, electrode column; 401, current sampling module; 402, zero-crossing comparison module; 403, phase-locked loop module; 404, drive circuit module; 501, casing; 502, preload seat; 503, cover ring; 504, permanent magnet ring; 505, adjustment coil; 506, magnetostrictive rod; 507, sliding column; 508, connecting sleeve; 601, metal shielding shell; 602, wind guide frame; 603, heat sink; 604, wind guide slot. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-11A wireless energy transmission vibration sensor for monitoring vibration of a generator mirror plate comprises: a heat-insulating protection mechanism and a transmitting circuit module, wherein a collection mechanism, a wireless module, a receiving circuit module, a signal processing unit and a magnetostrictive actuator are respectively arranged inside the heat-insulating protection mechanism, 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 shielding mechanism is installed on the surface of the heat-insulating protection mechanism. By means of the heat-insulating protection mechanism, the transmitting circuit module, the collecting mechanism, the wireless module, the receiving circuit module, the signal processing unit, the magnetostrictive actuator and the heat dissipation shielding mechanism, the resonant frequency can be controlled by the magnetostrictive actuator during use, that is, by relying on the elongation or shortening characteristics of the magnetostrictive rod 506 in the magnetization direction when being magnetized, the coupling capacitor 302 is adjusted by the magnetostrictive actuator, and then the resonant frequency is adjusted, thereby realizing self-tuning and ensuring efficient transmission.

[0027] Among them; the heat insulation protection mechanism includes a casing 101, a sealing plate 102, a signal passing plate 103, a lifting frame 104 and a supporting plate 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, and the supporting plate 105 is integrally arranged on the inner wall of the lifting frame 104. Through the arranged casing 101, sealing plate 102, signal passing plate 103, lifting frame 104 and supporting plate 105, a lift and gap can be formed between the device and the generator, thereby reducing heat conduction from the motor casing and avoiding overheating inside the device.

[0028] Among them; the collection mechanism includes a connecting seat 201, a guide slide 202, a pole plate 203, a connecting piece 204 and an elastic band 205. There are two connecting seats 201, and the two connecting seats 201 are fixedly connected to the inner wall of the casing 101, and the two connecting seats 201 are relatively distributed. The guide slide 202 is fixedly inserted between the two connecting seats 201, and 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 in the middle of the connecting piece 204, and the two pole plates 203 are electrically connected to the wireless module.

[0029] Among them; the collection mechanism also 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 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. Through the set connecting seat 201, guide slide column 202, pole plate 203, connecting sheet 204, elastic band 205, lifting frame 206, sliding hole 207 and 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 pole plates 203 during vibration, so as to facilitate external transmission through the wireless module.

[0030] Among them; the receiving circuit module includes a receiving coil 301, a coupling capacitor 302 and an input resistor 303, and the receiving coil 301, the coupling capacitor 302 and the input resistor 303 form a resonant circuit, and 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. Through the set transmitting circuit module, receiving coil 301, coupling capacitor 302 and input resistor 303, the electric energy generated by the hydro-generator can be used, and no additional independent power supply is required. The wireless energy transmission method adopted eliminates the dependence on wired power supply, simplifies the installation and maintenance process, and is particularly suitable for deployment in narrow or complex environments.

[0031] Among them; the coupling capacitor 302 includes a supporting shell 304, a slip ring 305, a constant voltage diaphragm 306, an insulating shell 307 and a connecting block 308, the supporting 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 supporting shell 304, the constant voltage diaphragm 306 is fixedly connected to the surface of the supporting shell 304, the insulating shell 307 is installed inside the supporting 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 supporting shell 304.

[0032] Among them; the coupling capacitor 302 also includes an electrode ring 309, a capacitor medium 310 and an electrode column 311, the electrode ring 309 is fixedly connected to the inside of the insulating shell 307, the capacitor medium 310 is fixedly connected to the inner wall of the electrode ring 309, the electrode column 311 is slidably connected to the inner wall of the capacitor medium 310, and the surface of the electrode column 311 is slidably connected to the inner wall of the slip ring 305. Through the setting of the support shell 304, slip ring 305, constant voltage diaphragm 306, insulating shell 307, connecting block 308, electrode ring 309, capacitor medium 310 and electrode column 311, it is convenient to change the capacitance between the electrode column 311 and the electrode ring 309 through the expansion and contraction of the electrode column 311, so as to facilitate the adjustment of the resonant frequency of the resonant circuit by changing the expansion and contraction of the electrode column 311 according to the needs, and at the same time, through the setting of the support shell 304 and the constant voltage diaphragm 306, it is possible to compensate for the internal negative pressure when the electrode column 311 expands and contracts, and at the same time, the inside of the support shell 304 is protected.

[0033] 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, and the drive circuit module 404 is fixedly installed at the output end of the phase-locked loop module 403. Through the set current sampling module 401, zero-crossing comparison module 402, phase-locked loop module 403 and drive circuit module 404, it is possible to monitor whether the system is in a detuned state, and control the magnetostrictive actuator to adjust feedback, ensuring that efficient energy transmission can be maintained under different working conditions, thereby improving the stability and reliability of the system.

[0034] The magnetostrictive actuator includes a casing 501, a preload seat 502, a cover ring 503, a permanent magnet ring 504, an adjustment coil 505, a magnetostrictive rod 506, a sliding column 507 and a connecting sleeve 508. The casing 501 is fixedly connected to the inner wall of the casing 101, the preload seat 502 and the cover ring 503 are respectively fixedly connected to the inner walls of both ends of the casing 501, the permanent magnet ring 504 is fixedly connected to the inner wall of the casing 501, the adjustment coil 505 is fixedly connected to the inner wall of the permanent magnet ring 504, and the magnetostrictive rod 506 is fixedly plugged in the preload seat 502. The magnetostrictive rod 506 is located on one side of the pre-tightening seat 502, and the magnetostrictive rod 506 is located inside the adjusting coil 505. The sliding 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 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 post 507 away from the magnetostrictive rod 506, and the inner wall of the connecting sleeve 508 is fixedly connected to the end of the electrode column 311 close to the slip ring 305, and the telescopic path of the magnetostrictive rod 506 is perpendicular to the sliding path of the mass block 208. The magnetostrictive rod 506 is directly distributed, and the magnetostrictive rod 506 can be adjusted by adjusting the coil 505 through the set housing 501, the preload seat 502, the cover ring 503, the permanent magnet ring 504, the adjustment coil 505, the magnetostrictive rod 506, the sliding column 507 and the connecting sleeve 508, so as to change the extension amount of the magnetostrictive rod 506, convert the current signal of the driving circuit module 404 into the mechanical movement of the magnetostrictive rod 506, and then drive the coupling capacitor 302 to change, so as to achieve resonance adjustment, and at the same time, the extension path of the magnetostrictive rod 506 and the sliding of the mass block 208 are adjusted. The vertical distribution of the path can reduce the impact of the sliding and jumping of the mass block 208 on the coupling capacitor 302. 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, the size of the ferromagnetic material changes significantly. It is usually called ferromagnetostrictive material. Its size change is much greater than that of magnetostrictive materials such as ferrite, and the energy generated is also large, so it is called giant magnetostrictive material. The material of the magnetostrictive rod 506 is ferromagnetostrictive material.

[0035] Among them; the heat dissipation shielding mechanism includes a metal shielding shell 601, an air guide frame 602, a heat sink 603 and an air guide groove 604, the metal shielding shell 601 is fixedly inserted into the interior of the housing 101, and the metal shielding shell 601 is located on one side of the receiving coil 301, the air guide frame 602 is fixedly connected to the interior of the metal shielding shell 601, the heat sink 603 is integrally arranged on the inner wall of the metal shielding shell 601, and the air guide groove 604 is opened around the air guide frame 602. Through the metal shielding shell 601, the air guide frame 602, the heat sink 603 and the air guide groove 604, the inner side of the receiving coil 301 can be shielded by the metal shielding shell 601 during use, thereby reducing the influence of the internal magnetic field change of the adjustment coil 505 on the receiving coil 301, and at the same time, the passing cold air is introduced into the shielding shell 601 through the air guide groove 604 to exchange heat with the heat sink 603 to achieve heat dissipation.

[0036] Working principle: During installation, the transmitting circuit module is installed on the hydro-turbine generator and electrically connected thereto, and the housing 101 is installed at the designated position of the hydro-turbine generator mirror plate, ensuring that the vibration direction of the mass block 208 is parallel to the vibration direction of the hydro-turbine generator mirror plate, and ensuring that the transmitting circuit module corresponds to the receiving coil 301; When in use, the transmitting circuit module converts the electric energy generated by the hydro-generator into an AC voltage of a specific frequency through the transmitting circuit, and then resonates 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. In order 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, and the zero-crossing comparison module 402 converts the current signal into a square wave signal with the same frequency and phase, and the phase-locked loop module 403 compares the square wave signal with the feedback signal in phase, 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 shorten through the driving circuit module 404. The extension or shortening 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 reach the resonant frequency, realizing the dynamic compensation self-tuning control of the circuit, and ensuring the efficient transmission of electric energy; The transmitted electric energy powers the wireless module. When vibration occurs, the mass block 208 will slide up and down along the guide slide 202. At this time, the capacitance value between the two plates 203 will change. The plate 203 transmits the capacitance value change signal to the outside through the wireless module, thereby obtaining the vibration information of the mirror plate. Since the alternating magnetic field generated by the regulating 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 capacitance value of the coupling capacitor 302 to change, the current of the regulating coil 505 is first controlled to thereby change the driving magnetic field. After the driving magnetic field changes, the magnetostrictive rod 506 will deform to become elongated or shortened. The elongated or shortened magnetostrictive rod 506 will drive the electrode column 311 to contract or extend through the sliding column 507, thereby changing the capacitance value between the electrode column 311 and the electrode ring 309, thereby achieving a change in the operating frequency of the resonant circuit.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 a generator mirror plate, characterized in that: include: A heat-insulating protection mechanism and a transmitting circuit module, wherein a collection mechanism, a wireless module, a receiving circuit module, a signal processing unit and a magnetostrictive actuator are respectively arranged inside the heat-insulating protection mechanism, 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 shielding mechanism is installed on the surface of the heat-insulating protection mechanism.

2. A wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 1, characterized in that: The heat-insulating protection mechanism comprises a casing (101), a sealing plate (102), a signal passing plate (103), a lifting frame (104) and a supporting plate (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); and the supporting plate (105) is integrally arranged on the inner wall of the lifting frame (104).

3. A wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 2, characterized in that: The acquisition mechanism comprises a connection seat (201), a guide slide (202), an electrode plate (203), a connection sheet (204) and an elastic band (205); the number of the connection seats (201) is two, and the two connection seats (201) are both fixedly connected to the inner wall of the housing (101), and the two connection seats (201) are relatively distributed; the guide slide (202) is fixedly plugged between the two connection seats (201); the electrode plates (203) are respectively fixedly installed on the inner walls of the two connection seats (201), and the two electrode plates (203) are distributed in parallel; the connection sheet (204) is fixedly connected between the two connection seats (201); the elastic band (205) is fixedly connected in the middle of the connection sheet (204), and the two electrode plates (203) are both electrically connected to the wireless module.

4. A wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 3, characterized in that: The collection mechanism further comprises 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 column (202) through the sliding hole (207); 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).

5. The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 2, characterized in that: The receiving circuit module comprises a receiving coil (301), a coupling capacitor (302) and an input resistor (303), and the receiving coil (301), the coupling capacitor (302) and the input resistor (303) form a resonant circuit, and 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 plate (103).

6. A wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 5, characterized in that: The coupling capacitor (302) comprises a supporting shell (304), a slip ring (305), a constant voltage diaphragm (306), an insulating shell (307) and a connecting block (308); the supporting 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 supporting shell (304); the constant voltage diaphragm (306) is fixedly connected to the surface of the supporting shell (304); the insulating shell (307) is installed inside the supporting 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 supporting shell (304).

7. A wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 6, characterized in that: The coupling capacitor (302) further comprises an electrode ring (309), a capacitor medium (310) and an electrode column (311); the electrode ring (309) is fixedly connected to the inside of the insulating shell (307); the capacitor medium (310) is fixedly connected to the inner wall of the electrode ring (309); the electrode column (311) is slidably connected to the inner wall of the capacitor medium (310); and the surface of the electrode column (311) is slidably connected to the inner wall of the slip ring (305).

8. The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 5, characterized in that: The signal processing unit comprises 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 mounted at the output end of the receiving circuit module, the zero-crossing comparison module (402) is fixedly mounted at the output end of the current sampling module (401), the phase-locked loop module (403) is fixedly mounted at the output end of the zero-crossing comparison module (402), and the drive circuit module (404) is fixedly mounted at the output end of the phase-locked loop module (403).

9. The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 7, characterized in that: The magnetostrictive actuator comprises a casing (501), a preload seat (502), a cover ring (503), a permanent magnet ring (504), an adjustment coil (505), a magnetostrictive rod (506), a sliding post (507) and a connecting sleeve (508); the casing (501) is fixedly connected to the inner wall of the casing (101); the preload seat (502) and the cover ring (503) are respectively fixedly connected to the inner walls at both ends of the casing (501); the permanent magnet ring (504) is fixedly connected to the inner wall of the casing (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 into the casing (101); The magnetostrictive rod (506) is connected to one side of the pre-tightening seat (502), and the magnetostrictive rod (506) is located inside the regulating coil (505); the sliding 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 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 post (507) away from the magnetostrictive rod (506), and the inner wall of the connecting sleeve (508) is fixedly connected to the end of the electrode post (311) close to the slip ring (305), and the telescopic path of the magnetostrictive rod (506) is vertically distributed to the sliding path of the mass block (208).

10. The wireless energy transmission vibration sensor for generator mirror plate vibration monitoring according to claim 2, characterized in that: The heat dissipation shielding mechanism comprises a metal shielding shell (601), an air guide frame (602), a heat sink (603) and an air guide groove (604); the metal shielding shell (601) is fixedly plugged into the interior of the housing (101), and the metal shielding shell (601) is located on one side of the receiving coil (301); the air guide frame (602) is fixedly connected to the interior of the metal shielding shell (601); the heat sink (603) is integrally arranged on the inner wall of the metal shielding shell (601); and the air guide groove (604) is provided around the air guide frame (602).

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