Blade lightning down lead fracture monitoring device and monitoring method

Abstract

The application discloses a blade lightning protection down lead fracture monitoring device, comprising three blades, a lightning protection down lead is arranged in the interior of each blade, the lightning protection down lead is connected with a monitoring unit in series, and the three monitoring units are connected with a host computer through optical fibers. The application further discloses a monitoring method of the blade lightning protection down lead fracture monitoring device. The application automatically monitors the on-off state of the blade lightning protection down lead through the principle of charge absorption, solves the problems of insufficient monitoring means and low efficiency, and does not need to stop during the whole measurement process and increase cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fan lightning protection monitoring method, and particularly relates to a blade lightning protection down lead fracture monitoring device and a monitoring method of the blade lightning protection down lead fracture monitoring device. BACKGROUND

[0002] The blade lightning protection down lead is an important channel for discharging lightning energy to the ground. When the aluminum blade tip or the lightning arrester of the blade is struck by lightning, the lightning can quickly flow to the ground along the lightning protection down lead path, thereby avoiding damage to the blade. However, this requires a key prerequisite: the lightning protection down lead from the aluminum blade tip to the blade root has no abnormal fracture. If the blade lightning protection down lead is disconnected at a position between the aluminum blade tip and the blade root, the lightning energy cannot be normally discharged, but will be applied to the blade. Because the energy of lightning is huge, this will cause damage to the blade, and even cause the blade to break, thereby causing huge economic losses.

[0003] The blade lightning protection down lead will be disconnected after long-time operation, and the function of the blade lightning protection down lead will be lost. Therefore, the fracture monitoring of the blade lightning protection down lead is a key link of lightning protection of the blade.

[0004] At present, the commonly used detection method is to measure the resistance according to Ohm's law, to form a complete closed loop for testing. The resistance is measured by a multimeter manually at both ends of the lightning protection down lead. This method usually needs the assistance of a crane or a drone, and the blade needs to be stopped during the measurement of the resistance, thereby affecting the production progress. Meanwhile, the whole testing process is time-consuming and laborious, and the efficiency is low. The whole testing method is mainly manual testing, and the cost is high. SUMMARY

[0005] The purpose of the present application is to provide a blade lightning protection down lead fracture monitoring device, which solves the problem of low fracture monitoring efficiency of the blade lightning protection down lead in the prior art.

[0006] Another purpose of the present application is to provide a monitoring method of the blade lightning protection down lead fracture monitoring device.

[0007] The first technical solution adopted by the present application is a blade lightning protection down lead fracture monitoring device, which comprises three blades. Each blade is internally provided with a lightning protection down lead. The lightning protection down lead is connected in series with a monitoring unit. The three monitoring units are connected with a host computer through optical fibers.

[0008] The first technical solution of the present application is also characterized in that:

[0009] The monitoring unit comprises an acquisition sensor. The acquisition sensor is connected in series with the lightning protection down lead. The acquisition sensor is arranged close to the root of the blade. The three acquisition sensors are connected with the host computer through optical fibers.

[0010] The acquisition sensor comprises a gas discharge tube connected in series on the lightning down conductor, and an oscillation circuit connected in parallel to the gas discharge tube, and the oscillation circuit is connected to the host computer.

[0011] The oscillation circuit comprises a first resistor, the upper end of which is connected to the input end of the gas discharge tube, and the lower end of which is connected to a second resistor and a third resistor respectively, the second resistor is connected to a first light emitting diode, the lower end of the first light emitting diode is connected to a first capacitor, a fourth resistor and a first NMOS tube respectively, the right end of the first capacitor is connected to a fifth resistor and a second NMOS tube respectively, the right end of the fourth resistor is connected to the g electrode of the first NMOS tube and the left end of a second capacitor respectively, and the first light emitting diode is connected to the host computer through an optical fiber.

[0012] The lower end of the third resistor is connected to a second light emitting diode, the lower end of the second light emitting diode is connected to a second capacitor, the lower end of the second light emitting diode is connected to the right end of the second capacitor, the right end of the fifth resistor, the d electrode of the second NMOS tube respectively, the left end of the second capacitor is connected to the right end of the fourth resistor and the g electrode of the first NMOS tube respectively, the left end of the fifth resistor is connected to the g electrode of the second NMOS tube and the right end of the first capacitor respectively, and the s electrode of the first NMOS tube and the s electrode of the second NMOS tube are connected to the output end of the gas discharge tube.

[0013] The port of the optical fiber is connected to a photodiode, the anode of the photodiode is grounded, the cathode is connected to a resistor and a trans-impedance amplifier respectively, the positive input end of the trans-impedance amplifier is grounded, the output end of the trans-impedance amplifier is connected to the right end of the resistor, the output end of the trans-impedance amplifier is also connected to a comparator, and the output end of the comparator is connected to the MCU of the host computer.

[0014] The reverse input end of the comparator is connected to a comparison reference voltage Vref.

[0015] The second technical scheme adopted by the application is a monitoring method of the blade lightning down conductor fracture monitoring device, which is specifically implemented according to the following steps:

[0016] Step 1: The host computer counts the pulse number of each acquisition sensor in a unit time.

[0017] Step 2: Whether the pulse number of each blade in a unit time is reduced is judged respectively.

[0018] Step 3: If the pulse number of a certain blade in a unit time is reduced, it is proved that the lightning down conductor of this blade is partially fractured.

[0019] Step 4: If the pulse number of a certain blade in a unit time is 0, it is proved that the lightning down conductor of this blade is completely fractured.

[0020] The blade lightning protection down lead fracture monitoring device has the advantages that the blade lightning protection down lead fracture monitoring device automatically monitors the on-off state of the blade lightning protection down lead through the principle of charge absorption, solves the problems of insufficient monitoring means and low efficiency, and does not need to stop during the whole measurement process and does not need to increase the cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a collection sensor position diagram of the blade lightning protection down lead fracture monitoring device of the application;

[0022] Figure 2 is a connection diagram of the host and the collection sensor in the blade lightning protection down lead fracture monitoring device of the application;

[0023] Figure 3 is a principle block diagram of the collection sensor in the blade lightning protection down lead fracture monitoring device of the application;

[0024] Figure 4 is a circuit connection diagram of the oscillation circuit in the blade lightning protection down lead fracture monitoring device of the application;

[0025] Figure 5 is a principle diagram of the host processing and counting the light pulse in the blade lightning protection down lead fracture monitoring device of the application;

[0026] Figure 6 is a flow chart of the monitoring method of the blade lightning protection down lead fracture monitoring device of the application;

[0027] Figure 7 is a comparison diagram of the pulse number in unit time collected by the three collection sensors under the normal working condition in the blade lightning protection down lead fracture monitoring device of the application;

[0028] Figure 8 is a comparison diagram of the pulse number in unit time collected by the three collection sensors under the lightning protection down lead fracture condition in the blade lightning protection down lead fracture monitoring device of the application. DETAILED DESCRIPTION

[0029] The application will be described in detail below in combination with the drawings and specific embodiments.

[0030] The blade lightning protection down lead fracture monitoring device of the application, like Figures 1-2As shown, three blades 1 are included, each blade 1 is internally mounted with a lightning down conductor 2, the lightning down conductor 2 is connected in series with a monitoring unit, and the three monitoring units are connected with a host computer 3 through optical fibers. When the blade 1 rotates, the blade tip is always absorbing charges in the atmosphere, and the accumulated charges form an electric field on the lightning down conductor 2, which sends the absorbed charges to the ground along the lightning down conductor 2 under the action of the electric field. The monitoring unit is connected in series at the position of the lightning down conductor 2 at the root of the blade 1, and the monitoring unit converts the absorbed charges into optical pulses. The stronger the charge absorption capacity, the more optical pulses per unit time. When the three blades 1 rotate at the same time, and the lightning down conductor 2 of each blade 1 is not in a broken state, the charge absorption capacity of the three blades 1 is consistent. If the charge absorption capacity of one blade 1 decreases, and the charge absorption capacity of the other two blades 1 does not change, it indicates that the lightning down conductor 2 of this blade 1 has a fracture problem.

[0031] Embodiment 1

[0032] The blade lightning down conductor fracture monitoring device includes three blades 1, each blade 1 is internally mounted with a lightning down conductor 2, the lightning down conductor 2 is connected in series with a monitoring unit, and the three monitoring units are connected with a host computer 3 through optical fibers.

[0033] The monitoring unit includes a collection sensor 4 connected in series on the lightning down conductor 2, and the collection sensor 4 is arranged close to the root of the blade 1. The three collection sensors 4 are connected with the host computer 3 through optical fibers. The collection sensor 4 converts the absorbed charges into optical pulses. The stronger the charge absorption capacity, the more optical pulses per unit time. If the charge absorption capacity of one blade 1 decreases, but still has a certain charge absorption capacity, and the charge absorption capacity of the other two blades 1 does not change, it indicates that the lightning down conductor 2 of this blade 1 has a fracture problem. By comparing the number of pulses before and after the fracture anomaly, the fracture position can be determined according to the length of the entire lightning down conductor 2.

[0034] Embodiment 2

[0035] The blade lightning down conductor fracture monitoring device includes three blades 1, each blade 1 is internally mounted with a lightning down conductor 2, the lightning down conductor 2 is connected in series with a monitoring unit, and the three monitoring units are connected with a host computer 3 through optical fibers.

[0036] The monitoring unit includes a collection sensor 4 connected in series on the lightning down conductor 2, and the collection sensor 4 is arranged close to the root of the blade 1. The three collection sensors 4 are connected with the host computer 3 through optical fibers.

[0037] As Figure 3As shown, the acquisition sensor 4 includes a gas discharge tube connected in series with the lightning down conductor 2, and the gas discharge tube is connected in parallel with an oscillation circuit connected with the host computer 3. The IN port is connected with the lightning down conductor 2 in the blade tip direction, and the OUT port is connected with the lightning down conductor 2 of the hub. The electric field formed on the lightning down conductor 2 generates a voltage between the input port and the output port (between IN and OUT) of the acquisition sensor 4, and through the oscillation circuit, a periodic oscillation frequency is generated, and at the same time, the light-emitting diode is driven to emit light. The oscillation circuit is a double NMOS tube oscillation circuit, and in a stable state, the left and right two NMOS tubes are sequentially turned on to form oscillation, and the light-emitting diode is lit according to the oscillation frequency. The higher the voltage between IN and OUT, the higher the oscillation frequency, and the higher the brightness of the light-emitting diode, that is, the greater the number of light pulses per unit time. When the blade 1 is struck by lightning, because lightning has a high pulse voltage, there is a large voltage difference between IN and OUT at the moment, reaching the conduction threshold of the gas discharge tube, and the gas discharge tube is instantly turned on inside, forming a lightning discharge channel, and the lightning energy is discharged to the ground. At the same time, when lightning comes, the lightning energy passes through the gas discharge tube, and the oscillation circuit is not damaged.

[0038] Embodiment 3

[0039] The blade lightning down conductor fracture monitoring device includes three blades 1, and the lightning down conductor 2 is installed inside each blade 1, and the lightning down conductor 2 is connected in series with a monitoring unit. The three monitoring units are connected with the host computer 3 through an optical fiber.

[0040] The monitoring unit includes an acquisition sensor 4 connected in series with the lightning down conductor 2, and the acquisition sensor 4 is arranged close to the root of the blade 1. The three acquisition sensors 4 are connected with the host computer 3 through an optical fiber.

[0041] The acquisition sensor 4 includes a gas discharge tube connected in series with the lightning down conductor 2, and the gas discharge tube is connected in parallel with an oscillation circuit connected with the host computer 3.

[0042] As Figure 4As shown, the oscillation circuit includes a first resistor R1, the upper end of the first resistor R1 is connected to the input end of the gas discharge tube, the lower end of the first resistor R1 is respectively connected with a second resistor R2 and a third resistor R3, the second resistor R2 is connected with a first light emitting diode D1, the lower end of the first light emitting diode D1 is respectively connected with a first capacitor C1, a fourth resistor R4 and a first NMOS tube Q1, the right end of the first capacitor C1 is respectively connected with a fifth resistor R5 and a second NMOS tube Q2, the right end of the fourth resistor R4 is respectively connected to the g electrode of the first NMOS tube Q1 and the left end of a second capacitor C2, and the first light emitting diode D1 is connected with the host computer 3 through an optical fiber. As shown, the oscillation circuit includes a first resistor R1, the upper end of the first resistor R1 is connected to the input end of the gas discharge tube, the lower end of the first resistor R1 is respectively connected with a second resistor R2 and a third resistor R3, the second resistor R2 is connected with a first light emitting diode D1, the lower end of the first light emitting diode D1 is respectively connected with a first capacitor C1, a fourth resistor R4 and a first NMOS tube Q1, the right end of the first capacitor C1 is respectively connected with a fifth resistor R5 and a second NMOS tube Q2, the right end of the fourth resistor R4 is respectively connected to the g electrode of the first NMOS tube Q1 and the left end of a second capacitor C2, and the first light emitting diode D1 is connected with the host computer 3 through an optical fiber.

[0043] Embodiment 4

[0044] The blade lightning down conductor fracture monitoring device comprises three blades 1, a lightning down conductor 2 is arranged in the interior of each blade 1, the lightning down conductor 2 is connected in series with a monitoring unit, and the three monitoring units are connected with a host computer 3 through optical fibers.

[0045] The monitoring unit comprises a collection sensor 4, the collection sensor 4 is connected in series on the lightning down conductor 2, and the collection sensor 4 is arranged close to the root of the blade 1; the three collection sensors 4 are connected with the host computer 3 through optical fibers.

[0046] The collection sensor 4 comprises a gas discharge tube, the gas discharge tube is connected in series on the lightning down conductor 2, the gas discharge tube is connected in parallel with an oscillation circuit, and the oscillation circuit is connected with the host computer 3.

[0047] The oscillation circuit includes a first resistor R1, the upper end of the first resistor R1 is connected to the input end of the gas discharge tube, the lower end of the first resistor R1 is respectively connected with a second resistor R2 and a third resistor R3, the second resistor R2 is connected with a first light emitting diode D1, the lower end of the first light emitting diode D1 is respectively connected with a first capacitor C1, a fourth resistor R4 and a first NMOS tube Q1, the right end of the first capacitor C1 is respectively connected with a fifth resistor R5 and a second NMOS tube Q2, the right end of the fourth resistor R4 is respectively connected to the g electrode of the first NMOS tube Q1 and the left end of a second capacitor C2, and the first light emitting diode D1 is connected with the host computer 3 through an optical fiber.

[0048] The lower end of the third resistor R3 is connected with the second light emitting diode D2, the lower end of the second light emitting diode D2 is connected with the second capacitor C2, the lower end of the second light emitting diode D2 is connected with the right end of the second capacitor C2 and the right end of the fifth resistor R5 respectively, the d pole of the second NMOS tube Q2, the left end of the second capacitor C2 is connected with the right end of the fourth resistor R4 and the g pole of the first NMOS tube Q1 respectively, the left end of the fifth resistor R5 is connected with the g pole of the second NMOS tube Q2 and the right end of the first capacitor C1 respectively, the s pole of the first NMOS tube Q1 and the s pole of the second NMOS tube Q2 are connected with the output end of the gas discharge tube. The first light emitting diode D1 or the second light emitting diode D2 is connected with the host computer 3, the lower end of the third resistor R3 is connected with the upper end of the second light emitting diode D2, the lower end of the second light emitting diode D2 is connected with the right end of the second capacitor C2, the right end of the fifth resistor R5, the d pole of the second NMOS tube Q2 respectively, the left end of the second capacitor C2 is connected with the right end of the fourth resistor R4 and the g pole of the first NMOS tube Q1 respectively, the left end of the fifth resistor R5 is connected with the g pole of the second NMOS tube Q2 and the right end of the first capacitor C1 respectively.

[0049] Embodiment 5

[0050] The blade lightning protection down lead fracture monitoring device comprises three blades 1, a lightning protection down lead 2 is arranged in the interior of each blade 1, a monitoring unit is connected in series with the lightning protection down lead 2, and the three monitoring units are connected with a host computer 3 through optical fibers.

[0051] The monitoring unit comprises a collection sensor 4, the collection sensor 4 is connected in series on the lightning protection down lead 2, the collection sensor 4 is arranged close to the root of the blade 1, and the three collection sensors 4 are connected with the host computer 3 through optical fibers.

[0052] The collection sensor 4 comprises a gas discharge tube, the gas discharge tube is connected in series on the lightning protection down lead 2, the gas discharge tube is connected in parallel with an oscillation circuit, and the oscillation circuit is connected with the host computer 3.

[0053] The oscillation circuit comprises a first resistor R1, the upper end of the first resistor R1 is connected with the input end of the gas discharge tube, the lower end of the first resistor R1 is connected with a second resistor R2 and a third resistor R3 respectively, the second resistor R2 is connected with a first light emitting diode D1, the lower end of the first light emitting diode D1 is connected with a first capacitor C1, a fourth resistor R4 and a first NMOS tube Q1 respectively, the right end of the first capacitor C1 is connected with a fifth resistor R5 and a second NMOS tube Q2 respectively, the right end of the fourth resistor R4 is connected with the g pole of the first NMOS tube Q1 and the left end of a second capacitor C2 respectively, and the first light emitting diode D1 is connected with the host computer 3 through an optical fiber.

[0054] The lower end of the third resistor R3 is connected with the second light emitting diode D2, the lower end of the second light emitting diode D2 is connected with the second capacitor C2, the lower end of the second light emitting diode D2 is connected with the right end of the second capacitor C2 and the right end of the fifth resistor R5 respectively, the d pole of the second NMOS tube Q2 and the left end of the second capacitor C2 are connected with the right end of the fourth resistor R4 and the g pole of the first NMOS tube Q1 respectively, the left end of the fifth resistor R5 is connected with the g pole of the second NMOS tube Q2 and the right end of the first capacitor C1 respectively, the s pole of the first NMOS tube Q1 and the s pole of the second NMOS tube Q2 are connected with the output end of the gas discharge tube, and the second light emitting diode D2 is connected with the host computer 3 through the optical fiber.

[0055] As shown in Figure 5 , the port of the optical fiber is connected with the photodiode D, the anode of the photodiode D is grounded, and the cathode is connected with the resistor R and the transimpedance amplifier U1 respectively, the positive input end of the transimpedance amplifier U1 is grounded, the output end of the transimpedance amplifier U1 is connected with the right end of the resistor R, and the output end of the transimpedance amplifier U1 is also connected with the comparator U2, the reverse input end of the comparator U2 is connected with the comparison reference voltage Vref, and the output end of the comparator U2 is connected with the MCU of the host computer 3. The anode of the photodiode D is grounded, and the cathode is connected to the left end of the resistor R and the reverse input end of the transimpedance amplifier U1 respectively, the positive input end of the transimpedance amplifier U1 is grounded, the output end of the transimpedance amplifier U1 is connected to the right end of the resistor R and the positive input end of the comparator U2 respectively, the reverse input end of the comparator U2 is connected with Vref, Vref is the comparison reference voltage, and the output end of U2 is connected to the host computer 3. The photodiode D performs photoelectric conversion on the optical pulse, converts it into a pulse current, and the pulse current is converted into a pulse voltage by the transimpedance amplifier U1, and the pulse voltage is compared with the comparison reference voltage Vref by the comparator U2. The comparator U2 can output a square wave pulse signal, and the MCU of the host computer 3 counts the square wave pulse signal, so that the number of optical pulses per unit time can be obtained. The blade 1 rotates continuously, and the MCU of the host computer 3 continuously counts the number of pulses per unit time of the three acquisition sensors 4.

[0056] Embodiment 6

[0057] The monitoring method of the blade lightning protection down conductor fracture monitoring device of the application is as shown in Figure 6 , and is implemented according to the following steps:

[0058] Step 1: The host computer 3 counts the number of pulses per unit time of the three acquisition sensors 4;

[0059] Step 2: Determine whether the number of pulses per unit time of each blade 1 is reduced;

[0060] Step 3: If the number of pulses corresponding to a blade 1 in unit time decreases, it proves that the lightning arrester down conductor 2 of this blade 1 is partially broken;

[0061] Step 4: If the number of pulses corresponding to a blade 1 in unit time is 0, it proves that the lightning arrester down conductor 2 of this blade 1 is completely broken.

[0062] When the lightning arrester down conductors 2 of three blades 1 are not broken, the charge absorption capacity is the same, and the number of pulses collected by the three collection sensors 4 in unit time is close, as shown in FIG. 2. Figure 7 When the lightning arrester down conductor 2 of one blade 1 is broken, it still has a certain charge absorption capacity, but the charge absorption capacity is lower than that in the normal state, so the number of pulses collected by the corresponding collection sensor 4 in unit time decreases, and the number of pulses collected by the other two collection sensors 4 in unit time remains unchanged, as shown in FIG. 3. Figure 8 The abnormality of the broken lightning arrester down conductor 2 occurs at t0, if the number of pulses before the abnormality is P1, the number of pulses after the abnormality is P2, and the length of the lightning arrester down conductor 2 is L, then the broken position is at L-L*P2 / P1 from the blade tip backward.

[0063] The blade lightning arrester down conductor broken monitoring device of the present application uses a double NMOS oscillation circuit inside the collection sensor to realize oscillation, the oscillation circuit controls the light-emitting diode to emit light, and the light pulses of the light-emitting diode are transmitted to the host computer through the optical fiber, so that the host computer can process and count the light pulses. The higher the voltage at both ends of the collection sensor, the higher the oscillation frequency. By collecting and counting the number of light pulses of the light-emitting diode in unit time, the charge absorption capacity can be restored. Without calibrating the data of various states (normal, completely broken, partially broken), the number of pulses in unit time and the change of time of the self-channel and the number of pulses in unit time and the change of time of the other two channels can be used to judge whether there is an abnormal state.

Claims

1. A blade lightning arrester down conductor breakage monitoring device, characterized in that: It includes three blades (1), each blade (1) is equipped with a lightning protection down conductor (2), the lightning protection down conductor (2) is connected in series with a monitoring unit, and the three monitoring units are all connected to a host (3) through optical fiber. The monitoring unit includes a data acquisition sensor (4), which is connected in series on the lightning arrester down conductor (2). The data acquisition sensor (4) is located near the root of the blade (1). All three data acquisition sensors (4) are connected to the host (3) via optical fiber. The acquisition sensor (4) includes a gas discharge tube, which is connected in series with the lightning arrester down conductor (2). The gas discharge tube is connected in parallel with an oscillation circuit, which is connected to the host (3). The oscillation circuit includes a first resistor (R1), the upper end of which is connected to the input terminal of the gas discharge tube. The lower end of the first resistor (R1) is connected to a second resistor (R2) and a third resistor (R3). The second resistor (R2) is connected to a first light-emitting diode (D1). The lower end of the first light-emitting diode (D1) is connected to a first capacitor (C1), a fourth resistor (R4), and a first NMOS transistor (Q1). The right end of the first capacitor (C1) is connected to a fifth resistor (R5) and a second NMOS transistor (Q2). The right end of the fourth resistor (R4) is connected to the gate of the first NMOS transistor (Q1) and the left end of the second capacitor (C2). The first light-emitting diode (D1) is connected to the host (3) via an optical fiber.

2. The blade lightning arrester down conductor breakage monitoring device according to claim 1, characterized in that: The lower end of the third resistor (R3) is connected to the second light-emitting diode (D2), the lower end of the second light-emitting diode (D2) is connected to the second capacitor (C2), the lower end of the second light-emitting diode (D2) is connected to the right end of the second capacitor (C2), the right end of the fifth resistor (R5), and the drain (d) terminal of the second NMOS transistor (Q2). The left end of the second capacitor (C2) is connected to the right end of the fourth resistor (R4) and the gate (g) terminal of the first NMOS transistor (Q1). The left end of the fifth resistor (R5) is connected to the gate (g) terminal of the second NMOS transistor (Q2) and the right end of the first capacitor (C1). The source (s) terminals of the first NMOS transistor (Q1) and the second NMOS transistor (Q2) are both connected to the output terminal of the gas discharge tube.

3. The blade lightning arrester down conductor breakage monitoring device according to claim 1, characterized in that: The port of the optical fiber is connected to a photodiode (D). The anode of the photodiode (D) is grounded, and the cathode is connected to a resistor R and a transimpedance amplifier (U1). The positive input terminal of the transimpedance amplifier (U1) is grounded, and the output terminal of the transimpedance amplifier (U1) is connected to the right end of the resistor (R). The output terminal of the transimpedance amplifier (U1) is also connected to a comparator (U2), and the output terminal of the comparator (U2) is connected to the MCU of the host (3).

4. The blade lightning arrester down conductor breakage monitoring device according to claim 3, characterized in that: The inverting input of the comparator (U2) is connected to a comparison reference voltage Vref.

5. The monitoring method of the blade lightning conductor breakage monitoring device according to any one of claims 1-4, characterized in that: The specific steps are as follows: Step 1: The host (3) counts the number of pulses per unit time corresponding to the three acquisition sensors (4); Step 2: Determine whether the number of pulses per unit time for each blade (1) decreases; Step 3: If the number of pulses per unit time for a certain blade (1) decreases, it proves that the lightning arrester down conductor (2) of this blade (1) is partially broken; Step 4: If the number of pulses per unit time for a certain blade (1) is 0, it proves that the lightning arrester (2) of this blade (1) is completely broken.

Images