Ultrasonic wireless power supply and signal transmission circuit, high-voltage isolation switch detection system and detection method

Abstract

The invention discloses an ultrasonic wireless power supply and signal transmission circuit, a high-voltage isolation switch detection system and a detection method, and the circuit comprises a DC power supply, a driving module, a transmitting transducer, a receiving transducer, an energy management and collection module, an encoding module, a signal collection and processing module, and a decoding module. The energy management and collection module comprises an impedance change circuit, an impedance matching circuit, a first rectifying circuit, an energy storage circuit and a voltage stabilizing circuit; the impedance change circuit generates impedance change according to the PWM signal output by the coding module; the encoding module encodes the image acquired by the image acquisition unit into a PWM signal; the signal acquisition and processing module acquires a first electric signal, and processes and converts the first electric signal to obtain a binary signal with image information; and the decoding module decodes the binary signal to obtain a detection image. According to the invention, the device state can be directly detected, and the detection accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless power supply, and in particular relates to an ultrasonic wireless power supply and signal transmission circuit, a high-voltage isolating switch detection system and a detection method. Background Art

[0002] With the growth of electricity demand and the development of the power industry, GIS (Gas Insulated Switchgear) meets the requirements of modern power systems and has been widely used. High-voltage disconnectors are crucial in GIS. Whether the high-voltage disconnectors are properly closed or disconnected will affect the safe and stable operation of GIS and even the power grid. Therefore, it is necessary to effectively monitor the disconnectors and perform maintenance in time to avoid greater losses. Since the disconnectors in GIS equipment are sealed in a metal insulating cylinder with SF6 gas, it is impossible to directly observe the opening and closing of the moving and static contacts of the disconnectors, which makes it a difficult problem to monitor the performance of the disconnectors in GIS equipment.

[0003] At present, the technology for monitoring the performance of disconnectors in GIS equipment includes indirectly judging the status of disconnectors through the position indicator on the mechanism box, the opening and closing indicator light in the control cabinet, or the position information of the background system. However, these methods have obvious defects, such as the cracking of the transmission sleeve, the broken shaft caused by the poor quality of the connecting rod material, and the inaccurate position of the in-place stroke switch, which may cause problems such as incomplete opening and closing of the transmission mechanism, insufficient opening distance of the moving and static contacts, and failure of position determination.

[0004] At present, the industry generally monitors SF6 gas pressure, infrared imaging temperature measurement, X-ray detection of knife switch status and other indicators to indirectly judge the status of high-voltage disconnectors. Some researchers also open a small window in GIS to directly observe whether the high-voltage disconnector is properly closed or disconnected. However, there are still certain deficiencies. Summary of the invention

[0005] The purpose of the present invention is to provide an ultrasonic wireless power supply and signal transmission circuit, a high-voltage isolating switch detection system and a detection method to solve the problem of inaccurate detection of traditional indirect detection methods.

[0006] The present invention solves the above technical problems through the following technical solutions: an ultrasonic wireless power supply and signal transmission circuit, comprising a DC power supply, a driving module, a transmitting transducer, a receiving transducer, an energy management and collection module, a coding module, a signal acquisition and processing module and a decoding module; the DC power supply, the driving module and the transmitting transducer are connected in sequence, the receiving transducer, the energy management and collection module and the coding module are connected in sequence, and the signal acquisition and processing module is connected to the output end of the driving module and the decoding module; The driving module is used to perform inversion, boosting and resonance matching processing on the output signal of the DC power supply to obtain a first electrical signal; the transmitting transducer is used to convert the first electrical signal into an ultrasonic signal; the receiving transducer is used to convert the ultrasonic signal into a second electrical signal; The energy management and collection module includes an impedance change circuit, an impedance matching circuit, a first rectifier circuit, an energy storage circuit and a voltage stabilizing circuit. The impedance change circuit is connected to the receiving transducer, the impedance matching circuit and the encoding module. The impedance matching circuit is connected to the receiving transducer and the first rectifier circuit. The first rectifier circuit is connected to the energy storage circuit and the voltage stabilizing circuit. The voltage stabilizing circuit is used to provide stable electric energy for the image acquisition unit and the encoding module. The impedance change circuit is used to generate impedance changes according to the PWM signal output by the encoding module. The encoding module is used to encode the image captured by the image acquisition unit into a PWM signal; the signal acquisition and processing module is used to acquire the first electrical signal, process and convert the first electrical signal, and obtain a binary signal with image information; the decoding module is used to decode the binary signal to obtain a detection image.

[0007] Furthermore, the driving module includes an inverter circuit, a boost circuit and a resonant matching network which are connected in sequence.

[0008] Furthermore, the impedance variation circuit includes a MOS tube, a resistor R1, a resistor R2 and a diode D1; the gate of the MOS tube is respectively connected to the first ends of the resistor R1 and the resistor R2, the drain of the MOS tube is connected to the receiving transducer, and the source of the MOS tube is connected to the impedance matching circuit and grounded; the second end of the resistor R1 is grounded, the second end of the resistor R2 is connected to the cathode of the diode D1, and the anode of the diode D1 is connected to the encoding module.

[0009] Furthermore, the energy management and collection module also includes a protection circuit, and the protection circuit is arranged between the first rectifier circuit and the voltage stabilizing circuit.

[0010] Furthermore, the signal acquisition and processing module includes a sampling resistor and a second rectifier circuit, a first filter circuit, an amplifier circuit, an envelope detection circuit, a voltage comparator and an analog-to-digital conversion circuit connected in sequence; the sampling resistor is connected to the output end of the driving module and the second rectifier circuit.

[0011] Furthermore, the amplifying circuit includes a first-stage amplifier, a second filtering circuit and a second-stage amplifier which are connected in sequence.

[0012] Furthermore, the envelope detection circuit includes a diode D2, a capacitor C1 and a resistor R3; the anode of the diode D2 is connected to the output end of the amplifier circuit, the cathode is connected to one end of the capacitor C1 and the resistor R3, and the other end of the capacitor C1 and the resistor R3 is grounded.

[0013] Based on the same concept, the present invention also provides a high-voltage disconnector detection system, comprising an image acquisition unit and the ultrasonic wireless power supply and signal transmission circuit as described above; the image acquisition unit is connected to the voltage stabilizing circuit and the encoding module in the ultrasonic wireless power supply and signal transmission circuit, and is used to acquire a state image of the high-voltage disconnector; The receiving transducer, energy management and collection module and encoding module in the ultrasonic wireless power supply and signal transmission circuit are arranged inside the GIS cabinet, and the DC power supply, driving module, transmitting transducer, signal acquisition and processing module and decoding module in the ultrasonic wireless power supply and signal transmission circuit are arranged outside the GIS cabinet.

[0014] Based on the same concept, the present invention also provides a high-voltage isolating switch detection method, which is applied to the high-voltage isolating switch detection system as described above, and the detection method includes: Get the status image of the high voltage disconnector; Encoding the state image to obtain a PWM signal; Producing impedance changes according to the PWM signal, so that the amplitude of the first electrical signal changes; Collecting a first electrical signal, and processing and converting the first electrical signal to obtain a binary signal having image information; The binary signal is decoded to obtain a detection image of the high-voltage disconnector.

[0015] Further, encoding the state image includes: Performing grayscale processing on the state image to obtain a grayscale image; Binarizing the grayscale image to obtain a binary image; The binary image is binary-coded and level-converted to obtain a PWM signal. Beneficial Effects

[0016] Compared with the prior art, the advantages of the present invention are: The present invention adopts ultrasonic wireless power supply to power the image acquisition unit, and encodes the image acquired by the image acquisition unit into a PWM signal. The impedance of the output end of the receiving transducer is adjusted by the PWM signal, so that the amplitude of the output signal of the driving module changes accordingly. The output signal of the driving module is collected, processed and decoded to obtain the corresponding image, thereby realizing the transmission of image information from inside to outside, realizing the direct detection of the equipment status, improving the detection accuracy of the equipment status, and solving the problem that the GIS isolation switch cannot be directly detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a structural block diagram of an ultrasonic wireless power supply and signal transmission circuit in an embodiment of the present invention; Figure 2 is a structural block diagram of a driving module in an embodiment of the present invention; Figure 3 is a schematic diagram of an impedance variation circuit in an embodiment of the present invention; Figure 4 is a structural block diagram of a signal acquisition and processing module in an embodiment of the present invention; Figure 5 is a first electrical signal waveform collected by the sampling resistor in an embodiment of the present invention; Figure 6 It is the high and low level signal output by the voltage comparator in the embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0021] Embodiment 1 Figure 1 The block diagram of the ultrasonic wireless power supply and signal transmission circuit is shown. Figure 1As shown, the ultrasonic wireless power supply and signal transmission circuit includes a DC power supply, a driving module, a transmitting transducer, a receiving transducer, an energy management and collection module, an encoding module, a signal acquisition and processing module, and a decoding module; the DC power supply, the driving module, and the transmitting transducer are connected in sequence, the receiving transducer, the energy management and collection module, and the encoding module are connected in sequence, and the signal acquisition and processing module is connected to the output end of the driving module and the decoding module.

[0022] The DC power supply is used to provide power for the entire circuit. The driving module is used to invert, boost and resonantly match the output signal of the DC power supply to obtain a first electrical signal. The transmitting transducer is used to convert the first electrical signal into an ultrasonic signal. The receiving transducer is used to convert the ultrasonic signal that penetrates the metal medium into a second electrical signal. The energy management and collection module is used to perform impedance matching, rectification and voltage stabilization on the second electrical signal, provide electrical energy for the image acquisition unit and the encoding module, and to generate impedance changes according to the PWM signal output by the encoding module, so that the amplitude of the first electrical signal changes accordingly. The energy management and collection module also uses the rectified second electrical signal for energy storage, and the stored electrical energy is used to provide electrical energy to the image acquisition unit and the encoding module when the impedance change is large and the second electrical signal is low and may not be able to supply power stably. The encoding module is used to encode the image acquired by the image acquisition unit into a PWM signal. The signal acquisition and processing module is used to acquire the first electrical signal, and process and convert the first electrical signal to obtain a binary signal with image information; the decoding module is used to decode the binary signal to obtain a detection image, thereby realizing the transmission of image information from inside to outside.

[0023] In a specific embodiment of the present invention, Figure 2 As shown, the driving module includes an inverter circuit, a boost circuit and a resonant matching network connected in sequence. Since the transmitting transducer needs to work under AC voltage, the inverter circuit inverts the DC voltage output by the DC power supply into an AC voltage, and then boosts the AC voltage to near the rated operating voltage of the transmitting transducer through the boost circuit, and then adjusts the operating frequency of the boosted signal to be consistent with the transmitting transducer through the resonant matching network to improve the energy conversion efficiency. In this embodiment, the boost circuit is a transformer; the resonant matching network can be a series inductor resonant circuit, a parallel inductor resonant circuit, an LC series resonant circuit or a CLC resonant circuit; the inverter circuit can be a half-bridge circuit or a full-bridge circuit.

[0024] The working principle of the transmitting transducer and the receiving transducer is based on the piezoelectric effect. When the piezoelectric crystal in the transmitting transducer is subjected to an electric field, the surface produces a mechanical deformation that changes linearly with the electric field, which is the inverse piezoelectric effect. The inverse piezoelectric effect can realize the conversion of electrical energy (i.e., the first electrical signal) to mechanical energy, thereby generating vibration and generating ultrasonic waves that match the voltage frequency. These ultrasonic waves can penetrate the metal medium and propagate inward, and are finally received by the receiving transducer. When the piezoelectric crystal in the receiving transducer is deformed by an external force, a charge accumulation that is linear with the external force appears on the surface of the piezoelectric crystal, which is the positive piezoelectric effect. Through the positive piezoelectric effect, the mechanical energy is converted into electrical energy (i.e., the second electrical signal).

[0025] In a specific embodiment of the present invention, Figure 1 As shown, the energy management and collection module includes an impedance change circuit, an impedance matching circuit, a first rectifier circuit, an energy storage circuit and a voltage stabilizing circuit. The impedance change circuit is connected to the receiving transducer, the impedance matching circuit and the encoding module. The impedance matching circuit is connected to the receiving transducer and the first rectifier circuit. The first rectifier circuit is connected to the energy storage circuit and the voltage stabilizing circuit. The impedance matching circuit is used to supplement the reactive power of the second electrical signal obtained from the receiving transducer to improve efficiency; the first rectifier circuit is used to convert the alternating current after the impedance matching circuit into direct current that can meet the power supply requirements of the image acquisition unit and the encoding module, and to charge the energy storage circuit; the voltage stabilizing circuit is used to stabilize the rectified signal and provide stable power to the image acquisition unit and the encoding module; the impedance change circuit is used to generate impedance changes according to the PWM signal output by the encoding module; the energy storage circuit is used to store electrical energy and to provide stable power to the image acquisition unit and the encoding module when the impedance change is large and the second electrical signal is low and may not be able to be stably powered.

[0026] In a specific embodiment of the present invention, the energy management and collection module further includes a protection circuit, which is arranged between the first rectifier circuit and the voltage stabilizing circuit. The protection circuit is used for protection against overheating or short circuit; the voltage stabilizing circuit can convert direct current into a stable direct current voltage of 3-12V to meet the working voltage requirements of the image acquisition unit and the encoding module.

[0027] In this embodiment, the impedance matching circuit may adopt a series inductance mode or a parallel resistance mode.

[0028] In this embodiment, the image acquisition unit uses a low-power camera to capture the device status image, and sends the device status image to the encoding module. The encoding module can use a single-chip microcomputer, which encodes the device status image and generates a PWM signal. The specific process of the single-chip microcomputer encoding the device status image is: graying the status image to obtain a grayscale image; binarizing the grayscale image to obtain a binary image; binary encoding (i.e., black corresponds to 0, white corresponds to 1) and level conversion (i.e., 1 corresponds to a high level, and 0 corresponds to a low level) the binary image to obtain a PWM signal.

[0029] In a specific embodiment of the present invention, Figure 3 As shown, the impedance change circuit includes a MOS tube, a resistor R1, a resistor R2 and a diode D1; the gate of the MOS tube is connected to the first end of the resistor R1 and the resistor R2 respectively, the drain of the MOS tube is connected to the receiving transducer, and the source of the MOS tube is connected to the impedance matching circuit and grounded; the second end of the resistor R1 is grounded, the second end of the resistor R2 is connected to the cathode of the diode D1, and the anode of the diode D1 is connected to the encoding module. The PWM signal is input to the gate of the MOS tube through the diode D1 and the resistor R2. When the PWM signal outputs a high level, the MOS tube is turned on. At this time, the on-resistance of the MOS tube is very small, so that the total impedance of the receiving transducer and the energy management and collection module is reduced; when the PWM signal outputs a low level, the MOS tube is turned off. At this time, the off-resistance of the MOS tube is very large, so that the total impedance of the receiving transducer and the energy management and collection module is increased; as the total impedance of the receiving transducer and the energy management and collection module changes, the amplitude of the output signal (i.e., the first electrical signal) of the driving module changes accordingly, thereby realizing the transmission of image information from inside to outside.

[0030] In a specific embodiment of the present invention, Figure 4 As shown, the signal acquisition and processing module includes a sampling resistor and a second rectifier circuit, a first filter circuit, an amplifier circuit, an envelope detection circuit, a voltage comparator and an analog-to-digital conversion circuit connected in sequence; the sampling resistor is connected to the output end of the driving module and the second rectifier circuit.

[0031] The voltage waveform (i.e., the first electrical signal) at the output end of the driving module is collected through the sampling resistor. Due to the on or off of the MOS tube in the impedance change circuit, the amplitude of the first electrical signal varies. Figure 5 As shown. The second rectifier circuit rectifies the collected first electrical signal, and then filters out noise and other interference through the first filter circuit to select a suitable frequency range; since the first electrical signal is small, it needs to be amplified by an amplifier circuit to facilitate subsequent processing; the amplified signal passes through the envelope detection circuit and the voltage comparator to output a voltage with obvious high and low levels, as shown Figure 6As shown; finally, it is converted into a binary signal with image information by an analog-to-digital conversion circuit.

[0032] In a specific implementation of the present invention, the amplifier circuit includes a first-stage amplifier, a second filtering circuit and a second-stage amplifier connected in sequence. In this embodiment, the first filtering circuit is a low-pass filtering circuit, and the second filtering circuit is a high-pass filtering circuit.

[0033] In a specific embodiment of the present invention, the envelope detection circuit includes a diode D2, a capacitor C1 and a resistor R3; the anode of the diode D2 is connected to the output end of the amplifier circuit, the cathode is connected to one end of the capacitor C1 and the resistor R3, and the other end of the capacitor C1 and the resistor R3 is grounded. The envelope detection circuit is used to extract the signal envelope from the amplified signal. Since the signal envelope has high and low differences in different voltage bands, and the signal envelope is weak and attenuated, the high and low differences of the signal envelope are not obvious, so it is necessary to process it through a voltage comparator. When the positive input of the voltage comparator (i.e., the signal envelope) is greater than its negative input, the voltage comparator outputs a high level; when the positive input of the voltage comparator (i.e., the signal envelope) is less than its negative input, the voltage comparator outputs a low level, thereby better reproducing the high and low level information.

[0034] The decoding module decodes the binary signal, that is, 0 corresponds to black and 1 corresponds to white, and maps it to obtain a binary image, and then obtains a detection image.

[0035] The present invention can realize direct detection of the device status, improve detection accuracy, and solve the problem of inaccurate detection in traditional indirect detection methods.

[0036] Embodiment 2 The embodiment of the present invention further provides a high-voltage isolating switch detection system, comprising an image acquisition unit and the ultrasonic wireless power supply and signal transmission circuit in the first embodiment of the present application; the image acquisition unit is connected to the voltage stabilizing circuit and the encoding module in the ultrasonic wireless power supply and signal transmission circuit, and is used to acquire a state image of the high-voltage isolating switch; The receiving transducer, energy management and collection module and encoding module in the ultrasonic wireless power supply and signal transmission circuit are arranged outside the GIS cabinet, and the DC power supply, driving module, transmitting transducer, signal acquisition and processing module and decoding module in the ultrasonic wireless power supply and signal transmission circuit are arranged outside the GIS cabinet.

[0037] The image acquisition unit is used to directly acquire the state image of the high-voltage disconnector, and then the state image is encoded by the encoding module to generate a PWM signal. The impedance change is adjusted by the PWM signal (that is, when the MOS tube is turned on, the impedance decreases; when the MOS tube is turned off, the impedance increases), so that the amplitude of the output signal of the driving module changes accordingly; then the signal acquisition and processing module is used to acquire the output signal of the driving module, and the output signal is processed and converted to obtain a binary signal with image information; finally, the decoding module is used to decode the binary signal to obtain the detection image of the high-voltage disconnector, and the opening and closing state of the high-voltage disconnector is directly known through the detection image, thereby realizing the direct detection of the state of the high-voltage disconnector, improving the detection accuracy, and effectively solving the problem that the GIS disconnector cannot be directly monitored.

[0038] Embodiment 3 The embodiment of the present invention further provides a high-voltage isolating switch detection method, which is applied to the high-voltage isolating switch detection system in the second embodiment of the present application. The detection method includes: Step 1: using an image acquisition unit to obtain a state image of the high-voltage disconnector; Step 2: Encode the state image using the encoding module to obtain a PWM signal; Step 3: the impedance changing circuit generates an impedance change according to the PWM signal, so that the amplitude of the first electrical signal changes; Step 4: The signal acquisition and processing module acquires the first electrical signal, and processes and converts the first electrical signal to obtain a binary signal with image information; Step 5: The decoding module decodes the binary signal to obtain a detection image of the high-voltage disconnector.

[0039] In a specific embodiment of the present invention, encoding the state image using an encoding module includes: Step 2.1: grayscale the state image to obtain a grayscale image; Step 2.2: Binarize the grayscale image to obtain a binary image; Step 2.3: Binary encode the binary image (i.e. black corresponds to 0, white corresponds to 1) and level convert (i.e. 0 corresponds to low level, 1 corresponds to high level) to obtain a PWM signal.

[0040] What is disclosed above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, which should be covered within the protection scope of the present invention.

Claims

1. An ultrasonic wireless power supply and signal transmission circuit, characterized in that: The circuit includes a DC power supply, a driving module, a transmitting transducer, a receiving transducer, an energy management and collection module, an encoding module, a signal acquisition and processing module, and a decoding module; the DC power supply, the driving module, and the transmitting transducer are connected in sequence, the receiving transducer, the energy management and collection module, and the encoding module are connected in sequence, and the signal acquisition and processing module is connected to the output end of the driving module and the decoding module; The driving module is used to perform inversion, boosting and resonance matching processing on the output signal of the DC power supply to obtain a first electrical signal; the transmitting transducer is used to convert the first electrical signal into an ultrasonic signal; the receiving transducer is used to convert the ultrasonic signal into a second electrical signal; The energy management and collection module includes an impedance change circuit, an impedance matching circuit, a first rectifier circuit, an energy storage circuit and a voltage stabilizing circuit. The impedance change circuit is connected to the receiving transducer, the impedance matching circuit and the encoding module. The impedance matching circuit is connected to the receiving transducer and the first rectifier circuit. The first rectifier circuit is connected to the energy storage circuit and the voltage stabilizing circuit. The voltage stabilizing circuit is used to provide stable electric energy for the image acquisition unit and the encoding module. The impedance change circuit is used to generate impedance changes according to the PWM signal output by the encoding module. The encoding module is used to encode the image acquired by the image acquisition unit into a PWM signal; the signal acquisition and processing module is used to acquire the first electrical signal, process and convert the first electrical signal, and obtain a binary signal with image information; The decoding module is used to decode the binary signal to obtain a detection image.

2. The ultrasonic wireless power supply and signal transmission circuit according to claim 1, characterized in that: The driving module comprises an inverter circuit, a boost circuit and a resonant matching network which are connected in sequence.

3. The ultrasonic wireless power supply and signal transmission circuit according to claim 1, characterized in that: The impedance variation circuit includes a MOS tube, a resistor R1, a resistor R2 and a diode D1; the gate of the MOS tube is respectively connected to the first ends of the resistor R1 and the resistor R2, the drain of the MOS tube is connected to the receiving transducer, and the source of the MOS tube is connected to the impedance matching circuit and grounded; the second end of the resistor R1 is grounded, the second end of the resistor R2 is connected to the cathode of the diode D1, and the anode of the diode D1 is connected to the encoding module.

4. The ultrasonic wireless power supply and signal transmission circuit according to claim 1, characterized in that: The energy management and collection module further includes a protection circuit, and the protection circuit is arranged between the first rectifier circuit and the voltage stabilizing circuit.

5. The ultrasonic wireless power supply and signal transmission circuit according to claim 1, characterized in that: The signal acquisition and processing module includes a sampling resistor and a second rectifier circuit, a first filter circuit, an amplifier circuit, an envelope detection circuit, a voltage comparator and an analog-to-digital conversion circuit connected in sequence; the sampling resistor is connected to the output end of the driving module and the second rectifier circuit.

6. The ultrasonic wireless power supply and signal transmission circuit according to claim 5, characterized in that: The amplifying circuit comprises a first-stage amplifier, a second filtering circuit and a second-stage amplifier which are connected in sequence.

7. The ultrasonic wireless power supply and signal transmission circuit according to claim 5, characterized in that: The envelope detection circuit includes a diode D2, a capacitor C1 and a resistor R3; the anode of the diode D2 is connected to the output end of the amplifier circuit, the cathode is connected to one end of the capacitor C1 and the resistor R3, and the other end of the capacitor C1 and the resistor R3 is grounded.

8. A high voltage disconnect switch detection system, characterized in that: The detection system comprises an image acquisition unit and an ultrasonic wireless power supply and signal transmission circuit as described in any one of claims 1 to 7; the image acquisition unit is connected to a voltage stabilizing circuit and an encoding module in the ultrasonic wireless power supply and signal transmission circuit, and is used to acquire a state image of the high-voltage disconnector; The receiving transducer, energy management and collection module and encoding module in the ultrasonic wireless power supply and signal transmission circuit are arranged inside the GIS cabinet, and the DC power supply, driving module, transmitting transducer, signal acquisition and processing module and decoding module in the ultrasonic wireless power supply and signal transmission circuit are arranged outside the GIS cabinet.

9. A high-voltage isolating switch detection method, applied to the high-voltage isolating switch detection system as claimed in claim 8, characterized in that: The detection method comprises: Get the status image of the high voltage disconnector; Encoding the state image to obtain a PWM signal; Producing impedance changes according to the PWM signal, so that the amplitude of the first electrical signal changes; Collecting a first electrical signal, and processing and converting the first electrical signal to obtain a binary signal having image information; The binary signal is decoded to obtain a detection image of the high-voltage disconnector.

10. The high-voltage disconnect switch detection method according to claim 9, characterized in that: Encoding the state image comprises: Performing grayscale processing on the state image to obtain a grayscale image; Binarizing the grayscale image to obtain a binary image; The binary image is binary-coded and level-converted to obtain a PWM signal.

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