Sound vibration sensor device applied to fan

Abstract

The utility model discloses a sound and vibration sensor device applied to a fan. The sound and vibration sensor device comprises a shell, a circuit board, a sensor and a surge protection circuit, the circuit board and the sensor are both arranged in the shell and connected with the shell, the sensor is connected with the circuit board, and the circuit board is provided with a power supply end, a GND grounding end and a PE grounding end; the surge protection circuit is arranged on the circuit board, the surge protection circuit comprises a discharge tube GDT, a first port of the discharge tube GDT is electrically connected with the power supply end, a second port of the discharge tube GDT is electrically connected with the GND grounding end, and a third port of the discharge tube GDT is connected with the PE grounding end. According to the sound and vibration sensor device applied to the draught fan, when the sound and vibration sensor device is struck by lightning, the surge protection circuit can discharge surge current generated by lightning stroke, so that the lightning protection effect on the sensor is achieved, and the probability that the sound and vibration sensor device is damaged in thunder and lightning weather is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning protection sensors, in particular to an acoustic vibration sensor device applied to a fan. Background Art

[0002] Wind turbine blades work at high altitudes and in all-weather conditions. They are often attacked by air media, atmospheric radiation, sand and dust, lightning, rainstorms, ice and snow, etc., which can easily cause damage to wind turbine blades. As one of the key components of wind turbines, the state of wind turbine blades directly affects the power generation efficiency of wind turbines. Therefore, sound and vibration sensor devices are usually installed on wind turbine blades. The sensor device integrates sound sensors and vibration sensors, which can monitor the sound and vibration information of wind turbine blades in real time during operation. However, since wind turbine blades work at high altitudes, in thunderstorms, the sound and vibration sensor devices are easily struck by lightning and produce surges, which can damage the sound and vibration sensor devices and make it impossible to monitor the wind turbine blades in real time. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model proposes an acoustic vibration sensor device applied to a wind turbine. When the acoustic vibration sensor device is struck by lightning, the surge protection circuit can discharge the surge current generated by the lightning strike, thereby providing lightning protection for the sensor and reducing the probability of damage to the acoustic vibration sensor device in lightning weather.

[0005] The acoustic vibration sensor device applied to a wind turbine according to an embodiment of the utility model comprises a shell, a circuit board, a sensor and a surge protection circuit; the circuit board and the sensor are both arranged in the shell and connected to the shell, the sensor is connected to the circuit board, the circuit board has a power supply terminal, a GND ground terminal and a PE ground terminal; the surge protection circuit is arranged on the circuit board, the surge protection circuit comprises a discharge tube, a first port of the discharge tube is electrically connected to the power supply terminal, a second port of the discharge tube is electrically connected to the GND ground terminal, and a third port of the discharge tube is connected to the PE ground terminal.

[0006] In some embodiments, the surge protection circuit further includes a varistor, and the varistor is connected in parallel with the discharge tube.

[0007] In some embodiments, the surge protection circuit further includes a TVS tube, and the TVS tube is connected in parallel with the discharge tube.

[0008] In some embodiments, the acoustic vibration sensor device applied to a wind turbine further includes a grounding circuit, the grounding circuit includes a capacitor, a first port of the capacitor is connected to the ground terminal, and a second port of the capacitor is connected to the PE ground terminal.

[0009] In some embodiments, the grounding circuit further includes a resistor, and the resistor is connected in parallel with the capacitor.

[0010] In some embodiments, the grounding circuit further includes an ESD tube, and the ESD tube is connected in parallel with the capacitor.

[0011] In some embodiments, a grounding member for grounding is provided on the circuit board, and the grounding member has the PE grounding terminal.

[0012] In some embodiments, the circuit board is connected to the housing via a fastener, and the fastener forms the grounding member.

[0013] In some embodiments, the shell is made of fiberglass.

[0014] In some embodiments, the shell has a thickness of 3 mm to 6 mm.

[0015] The acoustic vibration sensor device applied to the wind turbine of the embodiment of the utility model is provided with a surge protection circuit, which includes a discharge tube. When the acoustic vibration sensor device is struck by lightning, a surge phenomenon is generated at the power supply end. The surge current is discharged to the ground through the third port of the discharge tube, which can prevent the surge current from flowing through the sensor and other components and causing damage to them, thereby protecting the sensor and reducing the probability of damage to the acoustic vibration sensor device in thunderstorm weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the explosion structure of the acoustic vibration sensor device according to one embodiment of the utility model.

[0017] Figure 2 The utility model is a circuit diagram of a surge protection circuit of an acoustic vibration sensor device according to an embodiment of the utility model.

[0018] Figure 3 This is a circuit diagram of a grounding circuit of an acoustic vibration sensor device according to an embodiment of the utility model.

[0019] Reference numerals:

[0020] 100. Acoustic vibration sensor device; 1. Shell; 11. First half shell; 12. Second half shell; 2. Circuit board; 21. Fastener. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0022] like Figure 1 and Figure 2 As shown, the acoustic vibration sensor device 100 applied to the wind turbine of the embodiment of the utility model includes a shell 1, a circuit board 2, a sensor and a surge protection circuit; the circuit board 2 and the sensor are both arranged in the shell 1 and connected to the shell 1, the sensor is connected to the circuit board 2, the circuit board 2 has a power supply terminal 3, a GND ground terminal and a PE ground terminal; the surge protection circuit is arranged on the circuit board 2, the surge protection circuit includes a discharge tube GDT, the first port of the discharge tube GDT is electrically connected to the power supply terminal 3, the second port of the discharge tube GDT is electrically connected to the GND ground terminal, and the third port of the discharge tube GDT is connected to the PE ground terminal.

[0023] By setting a surge protection circuit, the surge protection circuit includes a discharge tube GDT. When the acoustic vibration sensor device 100 is struck by lightning, a surge phenomenon is generated at the power supply terminal 3. The surge current is discharged to the ground through the third port of the discharge tube GDT, which can prevent the surge current from flowing through components such as sensors and causing damage to them, thereby protecting the sensor and reducing the probability of damage to the acoustic vibration sensor device 100 in thunderstorm weather.

[0024] It is understandable that the acoustic vibration sensor device 100 can integrate multiple sensors, such as sound sensors, vibration sensors, temperature sensors, etc., and the multiple sensors are all installed on the circuit board 2 and are protected from lightning by the surge protection circuit.

[0025] Optionally, the discharge tube GDT is a three-terminal discharge tube.

[0026] In some embodiments, the surge protection circuit further includes a varistor R1 , and the varistor R1 is connected in parallel with the discharge tube GDT.

[0027] The varistor R1 can respond faster within the microsecond time range. When the surge current is large, the varistor R1 starts and can discharge a certain surge current. The voltage across the varistor R1 increases, pushing the discharge tube GDT to discharge and discharge the current to the ground.

[0028] like Figure 1 and Figure 2 As shown, two terminals of the varistor R1 are connected to the power terminal 3 and the GND ground terminal of the circuit board 2 respectively.

[0029] In some embodiments, the surge protection circuit further includes a TVS tube D, and the TVS tube D is connected in parallel with the discharge tube GDT.

[0030] TVS tube D can respond to surge voltage within a picosecond time range. When a lightning surge arrives, TVS tube D starts first, and can accurately control the instantaneous overvoltage at a certain level. If the surge current is large, the varistor R1 starts and discharges a certain surge current, causing the voltage at both ends to increase until the discharge tube GDT is driven to discharge and discharge the large current to the ground.

[0031] like Figure 2 As shown, the two ports of the TVS tube D are respectively connected to the power supply terminal 3 and the GND ground terminal of the circuit board 2; the surge protection circuit also includes an inductor L and a fuse PPTC connected in series, which further improves the lightning protection effect of the surge protection circuit on components such as sensors.

[0032] In some embodiments, the acoustic vibration sensor device 100 applied to a wind turbine further includes a grounding circuit, which includes a capacitor C, a first port of the capacitor C is connected to the GND ground terminal, and a second port of the capacitor C is connected to the PE ground terminal.

[0033] The GND grounding terminal of the circuit board 2 is connected to the PE grounding terminal through the grounding circuit. The capacitor C can introduce the static charge accumulated on the circuit board 2 to the PE grounding terminal to ensure that the potential of the GND grounding terminal is zero, thereby improving the performance stability of each component.

[0034] Optionally, the capacitance C value of the capacitor C is 1 nF and the rated voltage is 2 KV.

[0035] In some embodiments, the grounding circuit further includes a resistor R2 , and the resistor R2 and the capacitor C are connected in parallel.

[0036] When static electricity accumulates at the GND grounding terminal, the static electricity accumulation will cause high voltage, which may discharge and break down components such as sensors, causing damage to the acoustic vibration sensor device 100; the resistor R2 can ensure that the GND grounding terminal of the circuit board 2 will not accumulate static electricity, thereby reducing the probability of the acoustic vibration sensor device 100 being damaged due to static electricity accumulation.

[0037] Optionally, the resistance of resistor R2 is 1M.

[0038] Alternatively, if Figure 3 As shown, two terminals of the resistor R2 are connected to the GND ground terminal and the PE ground terminal respectively.

[0039] In some embodiments, the grounding circuit further includes an ESD tube E, and the ESD tube E is connected in parallel with the capacitor C.

[0040] The ESD tube E can protect components and prevent the components on the circuit board 2 from being damaged by electrostatic interference, thereby further improving the protection effect of the grounding circuit on other components.

[0041] Alternatively, if Figure 3 As shown, the two ports of the ESD tube E are connected to the GND ground terminal and the PE ground terminal respectively.

[0042] In some embodiments, a grounding member for grounding is provided on the circuit board 2, and the grounding member has the above-mentioned PE grounding terminal.

[0043] By providing a grounding piece, the third port of the discharge tube GDT, the second port of the capacitor C and other ports are connected to the grounding piece to achieve connection with the PE grounding terminal, which makes the connection more convenient.

[0044] In some embodiments, the circuit board 2 is connected to the housing 1 via a fastener 21 , and the fastener forms the above-mentioned grounding member.

[0045] The circuit board 2 and the housing 1 are connected by a fastener 21 . The fastener 21 is indispensable. By using the fastener 21 as a grounding piece, resources can be saved and costs can be reduced.

[0046] Optionally, the fastener 21 is a bolt and nut assembly, and the circuit board 2 is provided with a screw hole that matches the bolt and nut assembly. The circuit board 2 is detachably connected to the housing 1 through the bolt and nut assembly, making the disassembly and assembly of the circuit board 2 more convenient.

[0047] Optionally, when the shell 1 is made of metal, the shell 1 is connected to the ground, and the fastener 21 is connected to the shell 1, so that the PE grounding terminal can be grounded; when the shell 1 is made of non-metallic material, a wire can be connected to the fastener 21, and the end of the wire away from the grounding piece is grounded, thereby achieving grounding of the PE grounding terminal.

[0048] In some embodiments, the housing 1 is made of fiberglass.

[0049] By using glass fiber material for the shell 1, the glass fiber material has better insulation properties and thus better lightning protection effect; at the same time, the glass fiber material also has the characteristics of strong heat resistance, good corrosion resistance, and high mechanical strength, and can better adapt to the complex working environment on the wind turbine blades, thereby providing better protection for the circuit board 2.

[0050] Alternatively, if Figure 1 As shown, the housing 1 includes a first half shell 11 and a second half shell 12 . The first half shell 11 and the second half shell 12 are both made of fiberglass. The first half shell 11 and the second half shell 12 are connected to each other by a bolt assembly so as to install the circuit board 2 .

[0051] In some embodiments, the thickness of the housing 1 is 3 mm to 6 mm.

[0052] By setting the thickness of the shell 1 to 3 mm to 6 mm, the shell 1 is thicker, which can increase the ability of the shell 1 to resist lightning strikes, thereby providing better protection for the sensor on the circuit board 2 .

[0053] Preferably, the thickness of the housing 1 is 5 mm.

[0054] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An acoustic vibration sensor device (100) applied to a fan, characterized in that: include: Housing (1); A circuit board (2) and a sensor, wherein the circuit board (2) and the sensor are both arranged in the housing (1) and connected to the housing (1), the sensor is connected to the circuit board (2), and the circuit board (2) has a power supply terminal, a GND ground terminal, and a PE ground terminal; A surge protection circuit is provided on the circuit board (2), the surge protection circuit comprises a discharge tube, a first port of the discharge tube is electrically connected to the power supply end, a second port of the discharge tube is electrically connected to the GND grounding end, and a third port of the discharge tube is connected to the PE grounding end.

2. The acoustic vibration sensor device (100) for a wind turbine according to claim 1, characterized in that: The surge protection circuit further includes a varistor, and the varistor is connected in parallel with the discharge tube.

3. The acoustic vibration sensor device (100) for a wind turbine according to claim 2, characterized in that: The surge protection circuit further includes a TVS tube, and the TVS tube is connected in parallel with the discharge tube.

4. The acoustic vibration sensor device (100) for a wind turbine according to any one of claims 1 to 3, characterized in that: It also includes a grounding circuit, which includes a capacitor, a first port of the capacitor is connected to the GND grounding terminal, and a second port of the capacitor is connected to the PE grounding terminal.

5. The acoustic vibration sensor device (100) for a wind turbine according to claim 4, characterized in that: The grounding circuit further includes a resistor, and the resistor is connected in parallel with the capacitor.

6. The acoustic vibration sensor device (100) for a wind turbine according to claim 4, characterized in that: The grounding circuit also includes an ESD tube, and the ESD tube is connected in parallel with the capacitor.

7. The acoustic vibration sensor device (100) for a wind turbine according to claim 4, characterized in that: The circuit board (2) is provided with a grounding piece for grounding, and the grounding piece has the PE grounding terminal.

8. The acoustic vibration sensor device (100) for a wind turbine according to claim 7, characterized in that: The circuit board (2) is connected to the housing (1) via a fastener, and the fastener forms the grounding member.

9. The acoustic vibration sensor device (100) for a wind turbine according to claim 1, characterized in that: The shell (1) is made of glass fiber.

10. The acoustic vibration sensor device (100) for a wind turbine according to claim 9, characterized in that: The thickness of the shell (1) is 3 mm to 6 mm.

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