Vibration sensor device for wind power blade and method thereof

Abstract

The invention discloses a vibration sensor device for a wind power blade and a method thereof, and belongs to the technical field of wind power blade sensors, and the vibration sensor device comprises a digital accelerometer, a WIFI module, a low-power-consumption microcontroller, a built-in rechargeable battery and a low-current charging circuit which are arranged in an internal cavity of the wind power blade; the defects that the construction wiring workload is large due to a traditional wired installation mode, fixed wiring is prone to being pulled, abraded and broken, hidden dangers of poor contact of connectors are many, troubleshooting is difficult, and sensors, cables and collection equipment are damaged due to lightning stroke are effectively overcome.

Description

Technical Field

[0001] The present invention belongs to the technical field of sensors for wind turbine blades, and in particular relates to a vibration sensor device for wind turbine blades and a method thereof. Background Art

[0002] For example, the wind turbine blades disclosed in the patent publication number "CN205172819U" are the core part of the wind turbine generator set, responsible for absorbing wind energy and driving the motor to generate electricity. Wind turbine blades work at high altitudes and in all-weather conditions, bearing heavy loads and operating in a harsh environment. They are constantly eroded or affected by various media such as wind, sun, rain, lightning, corrosion, etc., and defects and damage will inevitably occur, which will have a huge impact on the performance and life of the blades. The failure of wind turbine blades can cause the wind turbine to shut down at the very least, affecting the power generation; in severe cases, blades can break and sweep the tower, leading to serious accidents such as tower collapse. Therefore, more and more wind turbines are now equipped with online blade monitoring systems, among which vibration sensors are the most commonly used.

[0003] At present, vibration sensors for wind turbine blades are all powered by the hub through wires. The wiring from the wind turbine blade to the hub is usually 20-40 meters long. When passing through the blade cavity, it is necessary to drill holes in the bottom cover plate. There is no special cable trough when routing the cable inside the hub. The cable routing is fixed by gluing and binding. The hub and wind turbine blades are connected through variable pitch bearings. Under different working conditions of the wind turbine, the wind turbine blades frequently perform slurry opening and slurry collection actions, which inevitably involve the fixed wiring, and the cable is easily worn and broken. If the sensor cable is designed as a whole cable, it will bring a large workload for after-sales maintenance to replace the whole cable; if the sensor cable is designed as a multi-section connection, it will lead to many joints, and there are many hidden dangers of poor contact of the joints during operation, which is difficult to troubleshoot.

[0004] Wind turbine blades work at high altitudes and are extremely vulnerable to lightning strikes during the rainy season. When a blade is struck by lightning, the long cable connects the high-voltage area of ​​the blade and the low-voltage area of ​​the hub. The strong voltage difference causes part of the lightning current that should have flowed through the blade down conductor to be released through the cable of the blade monitoring device, causing damage to the sensor, cable, and data collection equipment. Summary of the invention

[0005] To solve the above problems, the present invention provides a vibration sensor device for wind turbine blades and a method thereof, which include a digital accelerometer, a WIFI module, a low-power microcontroller, a built-in rechargeable battery and a small current charging circuit arranged in the internal cavity of the wind turbine blade; it effectively avoids the defects of the traditional wired installation method, such as the large workload of construction and wiring, the easy pulling, wear and tear of fixed wiring, the many hidden dangers of poor contact of joints, the difficulty in troubleshooting, and the damage of sensors, cables and acquisition equipment due to lightning strikes.

[0006] In order to overcome the deficiencies in the prior art, the present invention provides a solution for a vibration sensor device and method for a wind turbine blade, which are as follows:

[0007] A sensor device for a wind turbine blade, comprising:

[0008] A digital accelerometer, a WIFI module, a low-power microcontroller, a built-in rechargeable battery and a low-current charging circuit are arranged in the internal cavity of the wind turbine blade;

[0009] The digital accelerometer is connected to the microcontroller and is used to read a vibration signal from the digital accelerometer when the microcontroller is in vibration collection;

[0010] The WIFI module is connected to the microcontroller, and the microcontroller is used to transmit the vibration signal to the monitoring terminal in the WLAN through the WIFI module;

[0011] The small current charging circuit is electrically connected to the built-in rechargeable battery, the built-in rechargeable battery is electrically connected to the digital accelerometer, the WIFI module, and the low-power microcontroller, and the built-in rechargeable battery is used to power the digital accelerometer, the WIFI module, and the low-power microcontroller.

[0012] Furthermore, the small current charging circuit is electrically connected to the micro-energy generator, a section of plastic tube is installed inside the wind turbine blade, a permanent magnet is provided in the middle of the internal cavity of the plastic tube, two springs are respectively connected to the two sides of the permanent magnet, a plug and a coil are respectively provided on both sides of the plastic tube, the two coils are respectively electrically connected to the two input ends of the bridge rectifier circuit, the two output ends of the bridge rectifier circuit are respectively electrically connected to the two poles of the supercapacitor, and the output end of the supercapacitor is electrically connected to the small current charging circuit.

[0013] Further, the small current charging circuit includes a gas discharge tube G2, a resistor R1, a varistor M7, a surge diode D4, an anti-backflow diode D7, a voltage regulator diode D5, a capacitor C10, a resistor R4, a capacitor C11, a capacitor C24, a battery protection chip U2, a dual MOS power tube U8 and a resistor R18;

[0014] The output end of the supercapacitor and one end of the resistor R1 are electrically connected to one end of the gas discharge tube G2, the other end of the gas discharge tube G2 is grounded, the other end of the resistor R1 and one end of the inductor L2 are electrically connected to one end of the varistor M7, the other end of the varistor M7 is grounded, the other end of the inductor L2 and the cathode of the surge diode D4 are electrically connected to the anode of the anti-backflow diode D7, the cathode of the anti-backflow diode D7, the cathode of the voltage-stabilizing diode D5, one electrode of the capacitor C10, one end of the resistor R4, one electrode of the capacitor C11 are electrically connected to the anode of the built-in rechargeable battery BT1, the anode of the voltage-stabilizing diode D5 and the other electrode of the capacitor C11 are electrically connected to the capacitor C10. The other pole of C10 is grounded, the other end of resistor R4 and one pole of capacitor C24 are electrically connected to pin 5 of battery protection chip U2, the negative pole of built-in rechargeable battery BT1, the other pole of capacitor C24, pin 6 of battery protection chip U2, and pin 7 of dual MOS power tube U8 are electrically connected, pin 8 of dual MOS power tube U8 and pin 1 of dual MOS power tube U8 are electrically connected, pin 2 of dual MOS power tube U8 and pin 3 of dual MOS power tube U8 are grounded, pin 4 of dual MOS power tube U8 is electrically connected to pin 5 of battery protection chip U2, pin 4 of dual MOS power tube U8 is electrically connected to one end of resistor R18, and the other end of resistor R18 is grounded.

[0015] Furthermore, the low current charging circuit also includes a fuse F2 and a resistor R2;

[0016] One end of the fuse F2 is electrically connected to the positive electrode of the built-in rechargeable battery BT1, and the other end of the fuse F2 is electrically connected to one end of the resistor R2.

[0017] Furthermore, the positive electrode of the built-in rechargeable battery BT1 is electrically connected to one end of the resistor R24, the other end of the resistor R24 ​​is electrically connected to one end of the resistor R25, and the other end of the resistor R25 serves as a power source Vbat.

[0018] Furthermore, a power supply Vbat is electrically connected to one end of a resistor R5, the other end of the resistor R5, one end of the resistor R8, and one pole of the capacitor C25 are electrically connected to pin 21 of the microcontroller U11, and the other end of the resistor R8 and the other pole of the capacitor C25 are both grounded.

[0019] Furthermore, the power supply Vbat and one electrode of the capacitor C17 are electrically connected to the pin 3 of the voltage regulator U6, the pin 1 of the voltage regulator U6 is grounded, the pin 2 of the voltage regulator U6, one electrode of the capacitor C16 serving as the voltage source VCC, one electrode of the capacitor C22 and one electrode of the capacitor C23 are electrically connected, and the other electrode of the capacitor C16, the other electrode of the capacitor C22 and the other electrode of the capacitor C23 are grounded.

[0020] Further, pin 20 of the microcontroller U11 is electrically connected to one end of resistor R19, the other end of resistor R19, one end of resistor R21, and one end of resistor R20 are electrically connected to the base of transistor Q2, the other end of resistor R21 is electrically connected to power supply Vbat, the other end of resistor R20 is grounded, the emitter of transistor Q2 is grounded, the collector of transistor Q2 and the G pole of MOS tube Q1 are electrically connected to one end of resistor R22, the other end of resistor R22 is electrically connected to the D pole of MOS tube Q1, the S pole of MOS tube Q1, one pole of capacitor C7, and one pole of capacitor C4 are electrically connected to pin 3 of voltage regulator U13, the other pole of capacitor C7 is grounded, pin 1 of voltage regulator U13 is grounded, pin 2 of voltage regulator U13 as power supply VCC2, one pole of capacitor C5 are electrically connected to one pole of capacitor C6, and the other pole of capacitor C5 and the other pole of capacitor C6 are grounded.

[0021] Further, pin 1 of the WIFI module U9 is electrically connected to one end of the resistor 13 R31, the other end of the resistor 13 R31 and pin 3 of the WIFI module U9 are electrically connected to pin 24 of the microcontroller U11, the power supply 3 VCC2 and pin 8 of the WIFI module U9 are electrically connected to one pole of the capacitor 13 C12, the other pole of the capacitor 13 C12 is grounded, pin 23 of the WIFI module U9 is grounded, pin 15 of the WIFI module U9 and pin 16 of the WIFI module U9 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, and pin 9 of the WIFI module U9 and pin 23 of the WIFI module U9 are both grounded.

[0022] Furthermore, pin 5 of the electrostatic protection chip U3 is electrically connected to power supply three VCC2, pin 6 of the electrostatic protection chip U3 and pin 4 of the electrostatic protection chip U3 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, pin 2 of the electrostatic protection chip U3 is grounded, and pin 3 of the electrostatic protection chip U3 is electrically connected to pin 24 of the microcontroller U11.

[0023] Further, the power supply VCC, pin 14 of the microcontroller U11, pin 32 of the microcontroller U11, pin 19 of the microcontroller U11, pin 1 of the microcontroller U11 and pin 48 of the microcontroller U11 are electrically connected, pin 3 of the microcontroller U11 is electrically connected to pin 3 of the external crystal oscillator U14, pin 2 of the external crystal oscillator U14 is grounded, pin 1 of the external crystal oscillator U14, pin 4 of the external crystal oscillator U14, the power supply VCC and one pole of the capacitor C52 are electrically connected, and the other pole of the capacitor C52 is grounded.

[0024] Furthermore, one end of the reed switch S1 is grounded, and the other end of the reed switch S1 is electrically connected to pin 26 of the microcontroller U11.

[0025] Furthermore, pin 2 of the temperature sensor U5 disposed in the internal cavity of the wind turbine blade is grounded, pin 1 of the temperature sensor U5, pin 5 of the temperature sensor U5 and pin 4 of the temperature sensor U5 are electrically connected to pin 14 of the microcontroller U11, and pin 13 of the temperature sensor U5 and one pole of capacitor C28 are electrically connected to pin 15 of the microcontroller U11.

[0026] Further, pin 1 of the timer U1 is electrically connected to the power supply VCC, pin 2 of the timer U1 is grounded, pin 3 of the timer U1 is electrically connected to one end of a resistor R28, the other end of the resistor R28 is grounded, pin 6 of the timer U1 and pin 4 of the timer U1 are electrically connected to pin 7 of the microcontroller U11 and pin 8 of the microcontroller U11 respectively, pin 4 of the timer U1 is also electrically connected to one end of a resistor R29, the other end of the resistor R29 is grounded.

[0027] Further, pin 8 of the digital accelerometer U12, pin 5 of the digital accelerometer U12, and one pole of capacitor C26 are electrically connected to power supply VCC, the other pole of capacitor C26 is grounded, pin 2 of the digital accelerometer U12, pin 3 of the digital accelerometer U12, pin 6 of the digital accelerometer U12, and pin 7 of the digital accelerometer U12 are all grounded, pin 1 of the digital accelerometer U12 is electrically connected to pin 58 of the microcontroller U11, pin 14 of the digital accelerometer U12 is electrically connected to pin 59 of the microcontroller U11, pin 13 of the digital accelerometer U12 is electrically connected to pin 61 of the microcontroller U11, and pin 13 of the digital accelerometer U12 is electrically connected to pin 63 of the microcontroller U11.

[0028] Further, pin 1 of the SRAM memory U56 is electrically connected to pin 54 of the microcontroller U11, pin 2 of the SRAM memory U56 is electrically connected to pin 56 of the microcontroller U11, pin 4 of the SRAM memory U56 is grounded, pin 5 of the SRAM memory U56 is electrically connected to pin 57 of the microcontroller U11, pin 6 of the SRAM memory U56 is electrically connected to pin 55 of the microcontroller U11, pin 8 of the SRAM memory U56, power supply VCC and one pole of capacitor C27 are electrically connected, and the other pole of capacitor C27 is grounded.

[0029] A control method for a vibration sensor device for a wind turbine blade is provided. The SSID name of a wireless network arranged on a wind turbine is agreed upon: starting with HPW + server IP + _ + wind turbine name, which is 21 characters in total. The microcontroller of the vibration sensor device for the wind turbine blade finds the SSID with the specified agreed name by scanning the wireless AP hotspot, automatically inputs a fixed password or a variable password related to the wind turbine name, and can connect to the wind farm internal LAN through WIFI, and upload data to the server in the wind farm internal LAN according to the server IP.

[0030] Furthermore, the microcontroller stores the WIFI hotspot name in its internal FLASH. After the sensor is awakened and completes vibration data collection, it first uses the WIFI hotspot name and password stored in its internal FLASH to connect to the network. When the connection cannot be made, the sensor sends an AT command to the WIFI module, and the WIFI module performs a network scan. After scanning to obtain a new WIFI hotspot name in a specified format, the new WIFI hotspot name is used for connection.

[0031] The beneficial effects of the present invention are:

[0032] The present invention effectively avoids the defects of the traditional wired installation method, such as large construction and wiring workload, easy pulling, wear and tear of fixed wiring, many hidden dangers of poor joint contact, difficulty in troubleshooting, and damage to sensors, cables and acquisition equipment caused by lightning strikes. It has the characteristics of easy installation, stable and reliable equipment operation, and high signal-to-noise ratio of on-site data acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the micro-energy generator of the present invention;

[0034] Figure 2 It is a partial circuit diagram of the low current charging circuit of the present invention;

[0035] Figure 3 It is a partial circuit connection diagram of the built-in rechargeable battery of the present invention;

[0036] Figure 4 It is a partial circuit connection diagram of a power supply 1 of the present invention;

[0037] Figure 5 It is a partial circuit connection diagram of a power supply 1 of the present invention;

[0038] Figure 6 It is a partial circuit connection diagram of a power supply 1 of the present invention;

[0039] Figure 7 It is a partial circuit connection diagram of the WIFI module of the present invention;

[0040] Figure 8 It is a partial circuit connection diagram of the power supply 3 of the present invention;

[0041] Fig. 9 It is a partial circuit connection schematic diagram of the microcontroller of the present invention;

[0042] Fig.10 It is a partial circuit connection diagram of the reed switch of the present invention;

[0043] Fig.11It is a partial circuit connection schematic diagram of the temperature sensor of the present invention;

[0044] Fig.12 It is a partial circuit connection schematic diagram of the timer of the present invention;

[0045] Fig.13 It is a partial circuit connection diagram of the digital accelerometer of the present invention;

[0046] Fig.14 It is a partial circuit connection schematic diagram of the SRAM memory of the present invention;

[0047] Fig.15 It is a principle structural diagram of the sensor device for wind turbine blades of the present invention. DETAILED DESCRIPTION

[0048] The blades of wind turbines generally rotate at a speed of 8 to 18 rpm during operation. The characteristics of the blade potential energy changes when the wind turbine rotates can be used to develop a micro-energy generator, which can generate a weak power of about 20 to 40 mW. Therefore, the present invention provides a vibration sensor and a micro-energy generator for wind turbine blades with a matching micro-power consumption, and both are installed in the blade cavity, which can reduce the tedious work of hub power supply and avoid the risk of lightning induction across long lines.

[0049] On the other hand, the technical difficulties faced in the development of micro-power vibration sensors for wind turbine blades are as follows:

[0050] The wind turbine blades rotate when they are working. The sensors are installed in the internal cavity of the wind turbine blades, and the data collected by them must be transmitted to the server of the booster station through the wind farm LAN arranged in the cabin. The communication between the wind turbine blades and the cabin can only be done through the wireless LAN. The corresponding WIFI module of the wireless LAN needs several hundred mA to start. The micro-energy generator only generates a few mA of weak current when it is normal. How to provide power to the WIFI module normally is an urgent problem to be solved.

[0051] As the market demands for wind turbines with higher and higher power and higher power generation efficiency, the design of new wind turbines with larger and larger wind sweeping areas, the length of wind rotor blades has been increasing, and some even exceed 100 meters. For blades of such length, the traditional monitoring scheme of one acceleration sensor per blade can no longer achieve sensitive capture of blade failures, and cannot clearly locate the location of wind turbine blade failures. It is a realistic need to install 2 or even 3 vibration sensors for wind turbine blades on a wind turbine blade. Whether a micro-energy generator can simultaneously provide the power required for 2-3 vibration sensors for wind turbine blades is an urgent problem to be solved. The development of a low-power vibration sensor is imminent.

[0052] The vibration sensor for wind turbine blades is installed in the internal cavity of the wind turbine blades to measure the vibration and temperature information of the wind turbine blades online. The installation location is characterized by rugged roads, high-altitude operations, and narrow space; there is a strict safety management system inside the wind farm, and construction is not allowed when the wind is strong. Since the wind turbine blades need to be locked in a horizontal position before entering the blade operation, it is difficult to wait until the wind turbine blades are in a horizontal position when the wind is low. Therefore, the installation and maintenance workload of the vibration sensor for wind turbine blades is very large, which requires the vibration sensor for wind turbine blades to work reliably and be maintenance-free.

[0053] The present invention will be preferably described below in conjunction with the accompanying drawings and embodiments.

[0054] like Figures 1 to 15 As shown, a vibration sensor device for a wind turbine blade according to the present invention comprises:

[0055] A digital accelerometer, a WIFI module, a low-power microcontroller, a built-in rechargeable battery and a low-current charging circuit are arranged in the internal cavity of the wind turbine blade;

[0056] The digital accelerometer is connected to the microcontroller, and is used to read a vibration signal from the digital accelerometer when the microcontroller is in vibration collection, and the microcontroller performs vibration signal processing;

[0057] The WIFI module is connected to the microcontroller, and the microcontroller is used to transmit the vibration signal through the WIFI module to a monitoring terminal in the WLAN (the monitoring terminal may be a smart phone or a server in the WLAN);

[0058] The small current charging circuit is electrically connected to the built-in rechargeable battery, the built-in rechargeable battery is electrically connected to the digital accelerometer, the WIFI module, and the low-power microcontroller, and the built-in rechargeable battery is used to power the digital accelerometer, the WIFI module, and the low-power microcontroller.

[0059] The low current charging circuit has the function of charging the built-in rechargeable battery with the external input current of 5-10mA, 5-10V after taking lightning protection and anti-static protection measures, and protecting the built-in rechargeable battery. Most of the time, the digital accelerometer is in a dormant state. When the time reaches a preset time interval, the low-power microcontroller of the vibration sensor is awakened to collect vibration signals. Multiple independent vibration sensors can be awakened at the same time within a 0.5 second error to synchronously collect vibration signals.

[0060] In a preferred but non-limiting embodiment of the present invention, the small current charging circuit is electrically connected to the micro-energy generator, a section of plastic tube is installed inside the wind turbine blade, a permanent magnet 1 is provided in the middle of the internal cavity of the plastic tube 4, two springs 2 are respectively connected to the two sides of the permanent magnet 1, a plug 5 and a coil 3 are respectively provided on both sides of the plastic tube 4, the two coils 3 are respectively electrically connected to the two input ends of the bridge rectifier circuit, the two output ends of the bridge rectifier circuit are respectively electrically connected to the two poles of the supercapacitor, and the output end of the supercapacitor is electrically connected to the small current charging circuit.

[0061] When the wind turbine blades rotate, the permanent magnets continuously fall from a high place quickly, and their kinetic energy is converted into AC power by the coils at the bottom. The DC power is then stored in the supercapacitor through a bridge rectifier circuit.

[0062] In a preferred but non-limiting embodiment of the present invention, the small current charging circuit includes a gas discharge tube G2, a resistor R1, a varistor M7, a surge diode D4, an anti-backflow diode D7, a voltage regulator diode D5, a capacitor C10, a resistor R4, a capacitor C11, a capacitor C24, a battery protection chip U2, a dual MOS power tube U8 and a resistor R18;

[0063] The output end of the supercapacitor and one end of the resistor R1 are electrically connected to one end of the gas discharge tube G2, and the other end of the gas discharge tube G2 is grounded. The resistor R1 is a chip winding resistor. The other end of the resistor R1 and one end of the inductor L2 are electrically connected to one end of the varistor M7, and the other end of the varistor M7 is grounded. The inductor L2 is used to prevent electric shock. The other end of the inductor L2 and the negative electrode of the surge diode D4 are electrically connected to the positive electrode of the anti-backflow diode D7, and the positive electrode of the surge diode D4 is grounded. The negative electrode of the anti-backflow diode D7, the negative electrode of the voltage regulator diode D5, one electrode of the capacitor C10, one end of the resistor R4, and one electrode of the capacitor C11 are electrically connected to the positive electrode of the built-in rechargeable battery BT1. The voltage regulator diode D The positive electrode of 5, the other electrode of capacitor 2 C11 and the other electrode of capacitor 1 C10 are grounded, the other end of resistor 2 R4 and one electrode of capacitor 3 C24 are electrically connected to pin 5 of battery protection chip U2, the negative electrode of built-in rechargeable battery BT1, the other electrode of capacitor 3 C24, pin 6 of battery protection chip U2, and pin 7 of dual MOS power tube U8 are electrically connected, pin 8 of dual MOS power tube U8 and pin 1 of dual MOS power tube U8 are electrically connected, pin 2 of dual MOS power tube U8 and pin 3 of dual MOS power tube U8 are grounded, pin 4 of dual MOS power tube U8 is electrically connected to pin 5 of battery protection chip U2, pin 4 of dual MOS power tube U8 is electrically connected to one end of resistor 3 R18, and the other end of resistor 3 R18 is grounded.

[0064] Through the gas discharge tube G2, the resistor R1, the varistor M7, the surge diode D4, the anti-backflow diode D7, the voltage-stabilizing diode D5, the capacitor C10, the resistor R4, the capacitor C11 and the capacitor C24, the electric energy output from the output end of the supercapacitor of the micro-energy generator can be charged into the built-in rechargeable battery, so as to achieve the purpose of charging the built-in rechargeable battery, and also form an anti-reverse connection circuit and a lightning protection circuit for the built-in rechargeable battery, which plays an anti-reverse connection and lightning protection role for the built-in rechargeable battery. The battery protection chip U2, the dual MOS power tube U8 and the resistor R18 constitute a protection for the built-in rechargeable battery.

[0065] In a preferred but non-limiting embodiment of the present invention, the low current charging circuit further includes a fuse F2 and a resistor R2;

[0066] One end of the fuse F2 is electrically connected to the positive electrode of the built-in rechargeable battery BT1, and the other end of the fuse F2 is electrically connected to one end of the resistor R2. The resistor R2 is a chip resistor.

[0067] Through the fuse F2 and the resistor R2, the built-in rechargeable battery can be protected from lightning strikes.

[0068] In a preferred but non-limiting embodiment of the present invention, the positive electrode of the built-in rechargeable battery BT1 is electrically connected to one end of resistor R24, the other end of resistor R24 ​​is electrically connected to one end of resistor R25, and the other end of resistor R25 serves as a power source Vbat.

[0069] In a preferred but non-limiting embodiment of the present invention, a power supply Vbat is electrically connected to one end of a resistor R5, the other end of the resistor R5, one end of a resistor R8, and one pole of a capacitor C25 are electrically connected to pin 21 of a microcontroller U11, and the other end of the resistor R8 and the other pole of the capacitor C25 are both grounded.

[0070] The power supply Vbat is electrically connected to one end of the resistor R5, the other end of the resistor R5, one end of the resistor R8, and one pole of the capacitor C25 are electrically connected to pin 21 of the microcontroller U11, and the other end of the resistor R8 and the other pole of the capacitor C25 are grounded, so that the signal of the power supply Vbat is sent to the microcontroller U11 to be mastered.

[0071] In a preferred but non-limiting embodiment of the present invention, a power supply Vbat and one pole of a capacitor C17 are electrically connected to pin 3 of a voltage regulator U6, pin 1 of the voltage regulator U6 is grounded, pin 2 of the voltage regulator U6, one pole of a capacitor C16 as a voltage source VCC, one pole of a capacitor C22 and one pole of a capacitor C23 are electrically connected, and the other pole of the capacitor C16, the other pole of the capacitor C22 and the other pole of the capacitor C23 are grounded.

[0072] Through the power supply Vbat, one electrode of the capacitor C17 is electrically connected to the pin 3 of the voltage regulator U6, the pin 1 of the voltage regulator U6 is grounded, the pin 2 of the voltage regulator U6, one electrode of the capacitor C16 as the voltage source VCC, one electrode of the capacitor C22 and one electrode of the capacitor C23 are electrically connected, the other electrode of the capacitor C16, the other electrode of the capacitor C22 and the other electrode of the capacitor C23 are grounded, and the power supply Vbat outputs the power supply VCC through the voltage regulator U6.

[0073] In a preferred but non-limiting embodiment of the present invention, the 20th foot of the microcontroller U11 is electrically connected to one end of the resistor nine R19, the other end of the resistor nine R19, one end of the resistor ten R21, and one end of the resistor eleven R20 are electrically connected to the base of the transistor Q2, the other end of the resistor ten R21 is electrically connected to the power supply one Vbat, the other end of the resistor eleven R20 is grounded, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2, the G pole of the MOS tube Q1 and one end of the resistor twelve R22 are electrically connected. The other end of the resistor R22 is electrically connected to the D pole of the MOS tube Q1, the S pole of the MOS tube Q1, one pole of the capacitor C7, one pole of the capacitor C4 and the 3rd pin of the voltage regulator U13 are electrically connected, the other pole of the capacitor C7 is grounded, the 1st pin of the voltage regulator U13 is grounded, the 2nd pin of the voltage regulator U13 as the power supply VCC2, one pole of the capacitor C5 and one pole of the capacitor C6 are electrically connected, and the other pole of the capacitor C5 and the other pole of the capacitor C6 are grounded.

[0074] Pin 20 of the microcontroller U11 is electrically connected to one end of the resistor R19, the other end of the resistor R19, one end of the resistor R21, and one end of the resistor R20 are electrically connected to the base of the transistor Q2, the other end of the resistor R21 is electrically connected to the power supply Vbat, the other end of the resistor R20 is grounded, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2, the G pole of the MOS tube Q1 are electrically connected to one end of the resistor R22, the other end of the resistor R22 is electrically connected to the D pole of the MOS tube Q1, the S pole of the MOS tube Q1, one pole of the capacitor C7, and one pole of the capacitor C4 are electrically connected to the regulator. Pin 3 of the second U13 is electrically connected, the other pole of the capacitor nine C7 is grounded, and the pin 1 of the voltage regulator two U13 is grounded. Pin 2 of the voltage regulator two U13, which serves as the power supply three VCC2, and one pole of the capacitor eleven C5 and one pole of the capacitor twelve C6 are electrically connected. The other pole of the capacitor eleven C5 and the other pole of the capacitor twelve C6 are grounded. Therefore, pin 20 of the microcontroller U11 can output a high level to turn on the transistor and the MOS tube, so that the power supply one Vbat can be converted into the power supply three VCC2 through the voltage regulator two U13 to power the WIFI module. In this way, the power supply to the WIFI module can be controlled, which is beneficial to power saving of the WIFI module.

[0075] In a preferred but non-limiting embodiment of the present invention, pin 1 of the WIFI module U9 is electrically connected to one end of the resistor 13 R31, the other end of the resistor 13 R31 and pin 3 of the WIFI module U9 are electrically connected to pin 24 of the microcontroller U11, the power supply 3 VCC2 and pin 8 of the WIFI module U9 are electrically connected to one pole of the capacitor 13 C12, the other pole of the capacitor 13 C12 is grounded, pin 23 of the WIFI module U9 is grounded, pin 15 of the WIFI module U9 and pin 16 of the WIFI module U9 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, and pin 9 of the WIFI module U9 and pin 23 of the WIFI module U9 are both grounded.

[0076] By electrically connecting pin 1 of the WIFI module U9 to one end of the resistor 13 R31, the other end of the resistor 13 R31 and pin 3 of the WIFI module U9 to pin 24 of the microcontroller U11, the power supply 3 VCC2 and pin 8 of the WIFI module U9 to one pole of the capacitor 13 C12, the other pole of the capacitor 13 C12 is grounded, pin 23 of the WIFI module U9 is grounded, pin 15 of the WIFI module U9 and pin 16 of the WIFI module U9 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, and pin 9 of the WIFI module U9 and pin 23 of the WIFI module U9 are both grounded, the power supply 3 VCC2 can supply power to the WIFI module U9, and under the action of the high level output by pin 24 of the microcontroller U11, the WIFI module U9 can be activated to transmit vibration signals and temperature signals to the monitoring terminal in the WLAN.

[0077] In a preferred but non-limiting embodiment of the present invention, pin 5 of the electrostatic protection chip U3 is electrically connected to power supply three VCC2, pin 6 of the electrostatic protection chip U3 and pin 4 of the electrostatic protection chip U3 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, pin 2 of the electrostatic protection chip U3 is grounded, and pin 3 of the electrostatic protection chip U3 is electrically connected to pin 24 of the microcontroller U11.

[0078] Pin 5 of the electrostatic protection chip U3 is electrically connected to power supply VCC2, pin 6 of the electrostatic protection chip U3 and pin 4 of the electrostatic protection chip U3 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, pin 2 of the electrostatic protection chip U3 is grounded, and pin 3 of the electrostatic protection chip U3 is electrically connected to pin 24 of the microcontroller U11, thereby achieving electrostatic protection for the WIFI module.

[0079] In a preferred but non-limiting embodiment of the present invention, power supply 2 VCC, pin 14 of microcontroller U11, pin 32 of microcontroller U11, pin 19 of microcontroller U11, pin 1 of microcontroller U11 and pin 48 of microcontroller U11 are electrically connected, so that power can be provided to microcontroller U11. The microcontroller U11 has a large memory, which can reach 320K, and can process many signals. Pin 3 of microcontroller U11 is electrically connected to pin 3 of external crystal oscillator U14, pin 2 of external crystal oscillator U14 is grounded, pin 1 of external crystal oscillator U14, pin 4 of external crystal oscillator U14, power supply 2 VCC are electrically connected to one pole of capacitor 14 C52, and the other pole of capacitor 14 C52 is grounded.

[0080] Through the power supply VCC, pin 14 of the microcontroller U11, pin 32 of the microcontroller U11, pin 19 of the microcontroller U11, pin 1 of the microcontroller U11 and pin 48 of the microcontroller U11, power can be provided to the microcontroller U11. The microcontroller U11 has a large memory, which can reach 320K, and can process many signals. Pin 3 of the microcontroller U11 is electrically connected to pin 3 of the external crystal oscillator U14, pin 2 of the external crystal oscillator U14 is grounded, pin 1 of the external crystal oscillator U14, pin 4 of the external crystal oscillator U14, power supply VCC and one pole of capacitor C52 are electrically connected, and the other pole of capacitor C52 is grounded. The external crystal oscillator U14 can be combined with the RTC clock chip inside the microcontroller U11 to achieve better timing synchronization.

[0081] In a preferred but non-limiting embodiment of the present invention, one end of the reed switch S1 is grounded, and the other end of the reed switch S1 is electrically connected to pin 26 of the microcontroller U11.

[0082] By grounding one end of the reed switch S1 and electrically connecting the other end of the reed switch S1 to pin 26 of the microcontroller U11, when a magnet passes over the reed switch S1, the reed switch S1 can transmit an activation signal to the microcontroller U11, thereby activating the microcontroller U11 from the sleep state to normally perform tasks that temporarily require collecting sensor signals or controlling WIFI module communications.

[0083] In a preferred but non-limiting embodiment of the present invention, pin 2 of the temperature sensor U5 located in the internal cavity of the wind turbine blade is grounded, pin 1 of the temperature sensor U5, pin 5 of the temperature sensor U5 and pin 4 of the temperature sensor U5 are electrically connected to pin 14 of the microcontroller U11, and pin 13 of the temperature sensor U5 and one pole of capacitor C28 are electrically connected to pin 15 of the microcontroller U11.

[0084] By grounding pin 2 of the temperature sensor U5 located in the internal cavity of the wind turbine blade, electrically connecting pin 1 of the temperature sensor U5, pin 5 of the temperature sensor U5 and pin 4 of the temperature sensor U5 to pin 14 of the microcontroller U11, and electrically connecting pin 13 of the temperature sensor U5 and one pole of capacitor C28 to pin 15 of the microcontroller U11, the temperature signal collected by the temperature sensor U5 can be transmitted to the microcontroller U11.

[0085] In a preferred but non-limiting embodiment of the present invention, pin 1 of the timer U1 is electrically connected to power supply 2 VCC, pin 2 of the timer U1 is grounded, pin 3 of the timer U1 is electrically connected to one end of resistor 14 R28, the other end of resistor 14 R28 is grounded, pin 6 of the timer U1 and pin 4 of the timer U1 are electrically connected to pin 7 of the microcontroller U11 and pin 8 of the microcontroller U11 respectively, pin 4 of the timer U1 is also electrically connected to one end of resistor 15 R29, the other end of resistor 15 R29 is grounded.

[0086] Pin 1 of the timer U1 is electrically connected to the power source VCC, pin 2 of the timer U1 is grounded, pin 3 of the timer U1 is electrically connected to one end of resistor R28, the other end of resistor R28 is grounded, pin 6 of the timer U1 and pin 4 of the timer U1 are electrically connected to pin 7 of the microcontroller U11 and pin 8 of the microcontroller U11 respectively, and pin 4 of the timer U1 is also electrically connected to one end of resistor R29, the other end of resistor R29 is grounded. In this way, combined with the timer U1, the working status of the microcontroller U11 can be monitored: when the microcontroller U11 fails to communicate with the outside world through the WIFI module for a long time, the timer U1 will reset the microcontroller U11, and the microcontroller U11 will send a reset signal when it starts to control the WIFI module to work again, so that the core components of the microcontroller U11 and the WIFI module will never crash, avoiding the tedious manual maintenance.

[0087] In a preferred but non-limiting embodiment of the present invention, pin 8 of the digital accelerometer U12, pin 5 of the digital accelerometer U12, and one pole of the capacitor C26 are electrically connected to the power supply VCC, the other pole of the capacitor C26 is grounded, pin 2 of the digital accelerometer U12, pin 3 of the digital accelerometer U12, pin 6 of the digital accelerometer U12, and pin 7 of the digital accelerometer U12 are all grounded, pin 1 of the digital accelerometer U12 is electrically connected to pin 58 of the microcontroller U11, pin 14 of the digital accelerometer U12 is electrically connected to pin 59 of the microcontroller U11, pin 13 of the digital accelerometer U12 is electrically connected to pin 61 of the microcontroller U11, and pin 13 of the digital accelerometer U12 is electrically connected to pin 63 of the microcontroller U11.

[0088] Through the 8th pin of the digital accelerometer U12, the 5th pin of the digital accelerometer U12, one pole of the capacitor C26 is electrically connected to the power supply VCC, the other pole of the capacitor C26 is grounded, the 2nd pin of the digital accelerometer U12, the 3rd pin of the digital accelerometer U12, the 6th pin of the digital accelerometer U12 and the 7th pin of the digital accelerometer U12 are all grounded, the 1st pin of the digital accelerometer U12 is electrically connected to the 58th pin of the microcontroller U11, the 14th pin of the digital accelerometer U12 is electrically connected to the 59th pin of the microcontroller U11, the 13th pin of the digital accelerometer U12 is electrically connected to the 61st pin of the microcontroller U11, and the 13th pin of the digital accelerometer U12 is electrically connected to the 63rd pin of the microcontroller U11. In this way, the vibration signal collected by the digital accelerometer U12 can be transmitted to the microcontroller U11.

[0089] In a preferred but non-limiting embodiment of the present invention, pin 1 of the SRAM memory U56 is electrically connected to pin 54 of the microcontroller U11, pin 2 of the SRAM memory U56 is electrically connected to pin 56 of the microcontroller U11, pin 4 of the SRAM memory U56 is grounded, pin 5 of the SRAM memory U56 is electrically connected to pin 57 of the microcontroller U11, pin 6 of the SRAM memory U56 is electrically connected to pin 55 of the microcontroller U11, pin 8 of the SRAM memory U56, power supply VCC and one pole of capacitor C27 are electrically connected, and the other pole of capacitor C27 is grounded.

[0090] By connecting the pin 1 of SRAM memory U56 to the pin 54 of microcontroller U11, the pin 2 of SRAM memory U56 to the pin 56 of microcontroller U11, the pin 4 of SRAM memory U56 to ground, the pin 5 of SRAM memory U56 to the pin 57 of microcontroller U11, the pin 6 of SRAM memory U56 to the pin 55 of microcontroller U11, the pin 8 of SRAM memory U56, the power source VCC and one pole of capacitor C27, and the other pole of capacitor C27 to ground, the microcontroller U11 can temporarily store the data that has not been successfully transmitted in the SRAM memory U56 when the wireless communication is not smooth, and try to continue to transmit in the next communication cycle, and the signal will not be lost even if the power is off.

[0091] In a specific application, the low-power microcontroller reads the vibration signal from the accelerometer, and the microcontroller processes the vibration signal. At the same time, the low-power microcontroller can turn on and off the power supply of the accelerometer to achieve the purpose of power saving of the accelerometer. The low-power microcontroller publishes the vibration data to the network through the WIFI module. At the same time, the low-power microcontroller can turn on and off the power supply of the WIFI module to achieve the purpose of power saving of the WIFI module.

[0092] In addition, the micro-energy generator continuously supplies about 5-8mA to the digital accelerometer when the blades rotate. This electricity is stored in an 800mAH lithium battery as a built-in rechargeable battery through the battery protection chip and dual MOS power tube as a lithium battery power management chip. When the battery voltage is greater than 3.5V, data collection can be performed, and it enters a dormant state when it is lower than 3.5V; the stm32L496RGT6 low-power MCU is used as a microcontroller, and a low-power mems acceleration sensor, that is, a digital accelerometer, can achieve acceleration signal collection with a power consumption of about 2mA, which lasts for 160s; after data collection is completed, the signal is transmitted to the monitoring terminal through the WIFI module, and the wireless signal communication consumes 70mA for 10s, and then enters a dormant state, and the power consumption is reduced to 20μA, waiting for the next collection cycle to arrive, and the timer is used to wake up regularly. For example, if the interval of scheduled data collection is set to 5 minutes, the 5-8mA current of one micro-energy generator can drive one blade digital accelerometer to work; if the interval of scheduled data collection is set to 10 minutes, the 5-8mA current of one micro-energy generator can drive two digital accelerometers to work; if the interval of scheduled data collection is set to 15 minutes, the 5-8mA current of one micro-energy generator can drive three digital accelerometers to work;

[0093] The microcontroller has a built-in RTC clock chip and is combined with an external crystal oscillator. The microcontroller can be requested to obtain the current time and the acquisition time interval setting when it is just started. For example, if the acquisition time interval is 10 minutes, all digital accelerometers will start collecting data every 10 minutes according to the built-in RTC clock time after synchronization. The collection time points may be 10 o'clock, 10:10, 10:20... In order to ensure the consistency of time, the RTC clock is synchronized every 6 hours. The built-in timer chip will reset the timer regularly when the microcontroller is running, otherwise the timer will reset the microcontroller, ensuring that the digital accelerometer works stably and reliably and never crashes. As long as the lithium battery has sufficient voltage, the digital accelerometer will work automatically without manual intervention.

[0094] In short, it can provide power to the WIFI module normally, the vibration sensor for wind turbine blades works reliably and is maintenance-free. A micro-energy generator can provide the power required for 2-3 vibration sensors for wind turbine blades at the same time, effectively avoiding the defects of pulling on fixed wiring, easy wear and breakage of cables, large workload of replacing the entire cable for after-sales maintenance, many hidden dangers of poor contact of connectors during operation, difficulty in troubleshooting, and damage to sensors, cables and collection equipment caused by lightning strikes.

[0095] The beneficial effects of the present invention are:

[0096] The present invention effectively avoids the defects of the traditional wired installation method, such as large construction and wiring workload, easy pulling, wear and tear of fixed wiring, many hidden dangers of poor joint contact, difficulty in troubleshooting, and damage to sensors, cables and acquisition equipment caused by lightning strikes. It has the characteristics of easy installation, stable and reliable equipment operation, and high signal-to-noise ratio of on-site data acquisition.

[0097] The vibration sensor device for wind turbine blades uses a wifi communication module to transmit data. After installation on site, it needs to be connected to the wireless network of the wind farm. However, the micro-power design makes the wifi communication module in a dormant state for a long time, and it is impossible to configure the screen and keyboard. How to let the wifi communication module automatically set the network configuration on site, find the SSID of the wireless network, set the IP address of the WIFI communication module, and set the server IP for data upload is also an urgent problem to be solved.

[0098] The control method of the vibration sensor device for wind turbine blades described in the present invention is to connect the vibration sensor device for wind turbine blades to the wireless network on the wind turbine and successfully upload data to the server. The SSID name of the wireless network on the wind turbine is agreed upon: starting with HPW + server IP + _ + wind turbine name, a total of 21 characters, such as

[0099] hpw192168001105001_DRG01

[0100] Hpw means hidden company name

[0101] 192168001105 means the server IP is 192.168.1.105

[0102] 001 means there is a network segment

[0103] DRG01 indicates the serial number of the WIFI hotspot

[0104] In this way, the microcontroller of the vibration sensor device for wind turbine blades can scan the wireless AP hotspot, find the SSID with the specified agreed name, automatically enter the fixed password or the variable password related to the wind turbine name, and then connect to the wind farm's internal LAN through WIFI, and upload the data to the server in the wind farm's internal LAN according to the server IP.

[0105] In a preferred but non-limiting embodiment of the present invention, the microcontroller can store the WIFI hotspot name in its internal FLASH. After the sensor is awakened and completes vibration data collection, it first uses the WIFI hotspot name and password stored in its internal FLASH to connect to the network. When the connection cannot be made, the sensor sends an AT command to the WIFI module, and the WIFI module performs a network scan. After scanning to obtain a new WIFI hotspot name in a specified format, the new WIFI hotspot name is used for connection.

[0106] The present invention has been described above in an illustrative manner using embodiments. Those skilled in the art should understand that the present disclosure is not limited to the embodiments described above, and that various changes, modifications and substitutions may be made without departing from the scope of the present invention.

Claims

1. A vibration sensor device for a wind turbine blade, characterized in that: include: A digital accelerometer, a WIFI module, a low-power microcontroller, a built-in rechargeable battery and a low-current charging circuit are arranged in the internal cavity of the wind turbine blade; The digital accelerometer is connected to the microcontroller and is used to read a vibration signal from the digital accelerometer when the microcontroller is in vibration collection; The WIFI module is connected to the microcontroller, and the microcontroller is used to transmit the vibration signal to the monitoring terminal in the WLAN through the WIFI module; The small current charging circuit is electrically connected to the built-in rechargeable battery, the built-in rechargeable battery is electrically connected to the digital accelerometer, the WIFI module, and the low-power microcontroller, and the built-in rechargeable battery is used to power the digital accelerometer, the WIFI module, and the low-power microcontroller.

2. The sensor device for a wind turbine blade according to claim 1, characterized in that: The small current charging circuit is electrically connected to the micro-energy generator. A section of plastic pipe is installed inside the wind turbine blade. A permanent magnet is arranged in the middle of the internal cavity of the plastic pipe. Two springs are connected to the two sides of the permanent magnet. A plug and a coil are arranged on both sides of the plastic pipe. The two coils are electrically connected to the two input ends of the bridge rectifier circuit respectively. The two output ends of the bridge rectifier circuit are electrically connected to the two poles of the supercapacitor respectively. The output end of the supercapacitor is electrically connected to the small current charging circuit.

3. The sensor device for a wind turbine blade according to claim 1, characterized in that: The small current charging circuit includes a gas discharge tube G2, a resistor R1, a varistor M7, a surge diode D4, an anti-backflow diode D7, a voltage regulator diode D5, a capacitor C10, a resistor R4, a capacitor C11, a capacitor C24, a battery protection chip U2, a dual MOS power tube U8 and a resistor R18; The output end of the supercapacitor and one end of the resistor R1 are electrically connected to one end of the gas discharge tube G2, the other end of the gas discharge tube G2 is grounded, the other end of the resistor R1 and one end of the inductor L2 are electrically connected to one end of the varistor M7, the other end of the varistor M7 is grounded, the other end of the inductor L2 and the cathode of the surge diode D4 are electrically connected to the anode of the anti-backflow diode D7, the cathode of the anti-backflow diode D7, the cathode of the voltage-stabilizing diode D5, one electrode of the capacitor C10, one end of the resistor R4, one electrode of the capacitor C11 are electrically connected to the anode of the built-in rechargeable battery BT1, the anode of the voltage-stabilizing diode D5 and the other electrode of the capacitor C11 are electrically connected to the capacitor C10. The other pole of C10 is grounded, the other end of the resistor R4 and one pole of the capacitor C24 are electrically connected to the 5th pin of the battery protection chip U2, the negative pole of the built-in rechargeable battery BT1, the other pole of the capacitor C24, the 6th pin of the battery protection chip U2, and the 7th pin of the dual MOS power tube U8 are electrically connected, the 8th pin of the dual MOS power tube U8 and the 1st pin of the dual MOS power tube U8 are electrically connected, the 2nd pin of the dual MOS power tube U8 and the 3rd pin of the dual MOS power tube U8 are grounded, the 4th pin of the dual MOS power tube U8 is electrically connected to the 5th pin of the battery protection chip U2, the 4th pin of the dual MOS power tube U8 is electrically connected to one end of the resistor R18, and the other end of the resistor R18 is grounded; The low current charging circuit also includes fuse F2 and resistor four R2; One end of the fuse F2 is electrically connected to the positive electrode of the built-in rechargeable battery BT1, and the other end of the fuse F2 is electrically connected to one end of the resistor R2.

4. The sensor device for a wind turbine blade according to claim 3, characterized in that: The positive electrode of the built-in rechargeable battery BT1 is electrically connected to one end of the resistor R24, the other end of the resistor R24 ​​is electrically connected to one end of the resistor R25, and the other end of the resistor R25 serves as a power source Vbat; A power source Vbat is electrically connected to one end of a resistor R5, the other end of the resistor R5, one end of the resistor R8, and one pole of the capacitor C25 are electrically connected to pin 21 of the microcontroller U11, and the other end of the resistor R8 and the other pole of the capacitor C25 are both grounded; A power source Vbat, one electrode of a capacitor C17 and a voltage regulator U6 are electrically connected to pin 3, a voltage regulator U6 pin 1 is grounded, a voltage regulator U6 pin 2, a capacitor C16 as a voltage source VCC, a capacitor C22 and a capacitor C23 are electrically connected to one electrode, and the other electrodes of the capacitor C16, the capacitor C22 and the capacitor C23 are grounded; Pin 20 of the microcontroller U11 is electrically connected to one end of resistor R19, the other end of resistor R19, one end of resistor R21, and one end of resistor R20 are electrically connected to the base of transistor Q2, the other end of resistor R21 is electrically connected to power supply Vbat, the other end of resistor R20 is grounded, the emitter of transistor Q2 is grounded, the collector of transistor Q2 and the G pole of MOS tube Q1 are electrically connected to one end of resistor R22, the other end of resistor R22 is electrically connected to the D pole of MOS tube Q1, the S pole of MOS tube Q1, one pole of capacitor C7, and one pole of capacitor C4 are electrically connected to pin 3 of voltage regulator U13, the other pole of capacitor C7 is grounded, pin 1 of voltage regulator U13 is grounded, pin 2 of voltage regulator U13 as power supply VCC2, one pole of capacitor C5 are electrically connected to one pole of capacitor C6, and the other pole of capacitor C5 and the other pole of capacitor C6 are grounded.

5. The sensor device for a wind turbine blade according to claim 4, characterized in that: Pin 1 of the WIFI module U9 is electrically connected to one end of a resistor 13 R31, the other end of the resistor 13 R31 and pin 3 of the WIFI module U9 are electrically connected to pin 24 of the microcontroller U11, power supply 3 VCC2 and pin 8 of the WIFI module U9 are electrically connected to one pole of a capacitor 13 C12, the other pole of the capacitor 13 C12 is grounded, pin 23 of the WIFI module U9 is grounded, pin 15 of the WIFI module U9 and pin 16 of the WIFI module U9 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, and pin 9 of the WIFI module U9 and pin 23 of the WIFI module U9 are both grounded; Pin 5 of the electrostatic protection chip U3 is electrically connected to power supply three VCC2, pin 6 of the electrostatic protection chip U3 and pin 4 of the electrostatic protection chip U3 are electrically connected to pin 16 of the microcontroller U11 and pin 17 of the microcontroller U11 respectively, pin 2 of the electrostatic protection chip U3 is grounded, and pin 3 of the electrostatic protection chip U3 is electrically connected to pin 24 of the microcontroller U11.

6. The sensor device for a wind turbine blade according to claim 5, characterized in that: A second power supply VCC, pin 14 of the microcontroller U11, pin 32 of the microcontroller U11, pin 19 of the microcontroller U11, pin 1 of the microcontroller U11 and pin 48 of the microcontroller U11 are electrically connected, pin 3 of the microcontroller U11 is electrically connected to pin 3 of the external crystal oscillator U14, pin 2 of the external crystal oscillator U14 is grounded, pin 1 of the external crystal oscillator U14, pin 4 of the external crystal oscillator U14, a second power supply VCC and one electrode of a capacitor C52 are electrically connected, and the other electrode of the capacitor C52 is grounded; One end of the reed switch S1 is grounded, and the other end of the reed switch S1 is electrically connected to pin 26 of the microcontroller U11.

7. The sensor device for a wind turbine blade according to claim 6, characterized in that: Pin 2 of the temperature sensor U5 disposed in the internal cavity of the wind turbine blade is grounded, pin 1 of the temperature sensor U5, pin 5 of the temperature sensor U5 and pin 4 of the temperature sensor U5 are electrically connected to pin 14 of the microcontroller U11, and pin 13 of the temperature sensor U5 and one electrode of the capacitor C28 are electrically connected to pin 15 of the microcontroller U11; Pin 1 of the timer U1 is electrically connected to the power supply VCC, pin 2 of the timer U1 is grounded, pin 3 of the timer U1 is electrically connected to one end of a resistor R28, the other end of the resistor R28 is grounded, pin 6 of the timer U1 and pin 4 of the timer U1 are electrically connected to pin 7 of the microcontroller U11 and pin 8 of the microcontroller U11 respectively, pin 4 of the timer U1 is also electrically connected to one end of a resistor R29, the other end of the resistor R29 is grounded.

8. The sensor device for a wind turbine blade according to claim 7, characterized in that: Pin 8 of the digital accelerometer U12, pin 5 of the digital accelerometer U12, and one electrode of the capacitor C26 are electrically connected to the power supply VCC, the other electrode of the capacitor C26 is grounded, pin 2 of the digital accelerometer U12, pin 3 of the digital accelerometer U12, pin 6 of the digital accelerometer U12, and pin 7 of the digital accelerometer U12 are all grounded, pin 1 of the digital accelerometer U12 is electrically connected to pin 58 of the microcontroller U11, pin 14 of the digital accelerometer U12 is electrically connected to pin 59 of the microcontroller U11, pin 13 of the digital accelerometer U12 is electrically connected to pin 61 of the microcontroller U11, and pin 13 of the digital accelerometer U12 is electrically connected to pin 63 of the microcontroller U11; Pin 1 of the SRAM memory U56 is electrically connected to pin 54 of the microcontroller U11, pin 2 of the SRAM memory U56 is electrically connected to pin 56 of the microcontroller U11, pin 4 of the SRAM memory U56 is grounded, pin 5 of the SRAM memory U56 is electrically connected to pin 57 of the microcontroller U11, pin 6 of the SRAM memory U56 is electrically connected to pin 55 of the microcontroller U11, pin 8 of the SRAM memory U56, power supply VCC and one pole of capacitor C27 are electrically connected, and the other pole of capacitor C27 is grounded.

9. A control method for a vibration sensor device for a wind turbine blade according to any one of claims 1 to 8, characterized in that: An agreement is made on the SSID name of the wireless network installed on the wind turbine: it starts with HPW + server IP + _ + wind turbine name, a total of 21 characters. The microcontroller of the vibration sensor device for wind turbine blades finds the SSID with the specified agreed name by scanning the wireless AP hotspot, automatically enters a fixed password or a variable password related to the wind turbine name, and can connect to the wind farm's internal LAN through WIFI, and upload data to the server in the wind farm's internal LAN according to the server IP.

10. The control method for the vibration sensor device for wind turbine blades according to claim 9, characterized in that: The microcontroller stores the WIFI hotspot name in its internal FLASH. After the sensor is awakened and completes vibration data collection, it first uses the WIFI hotspot name and password stored in its internal FLASH to connect to the network. When the connection cannot be made, the sensor sends an AT command to the WIFI module, and the WIFI module performs a network scan. After scanning to obtain a new WIFI hotspot name in a specified format, the new WIFI hotspot name is used for connection.

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