A vehicle-mounted wireless charging system and metal detection sharing device and metal detection method suitable for a lunar rover

Abstract

The application provides a vehicle-mounted wireless charging system and metal detection shared device suitable for a lunar rover and a metal detection method, and is realized based on a wireless charging device with a controllable rectifier on a secondary side; power is supplied by a vehicle-mounted battery in a working condition requiring metal detection; the controllable rectifier generates high-frequency excitation in reverse; a high-frequency magnetic field is generated in a receiving coil; then a test point is selected at a receiving end compensation network port; voltage and current are detected; and metal detection is completed through data processing and analysis. The application is used for taking the vehicle-mounted wireless charger of the lunar rover as a metal detector in a non-charging working condition.

Description

TECHNICAL FIELD

[0001] The application relates to a vehicle-mounted wireless charging system and metal detection shared device for a lunar rover and a metal detection method. BACKGROUND

[0002] The lunar rover is a special vehicle capable of running on the lunar surface and completing complex tasks such as lunar exploration, investigation, sample collection and analysis, and is one of important tools for lunar surface exploration. The progress of the technical research, the perfection degree of the function and the performance of the lunar rover will directly relate to the progress of the whole lunar exploration.

[0003] At present, the lunar rover basically adopts a solar panel and a charging battery to work cooperatively, relies on the solar cell to work in the daytime on the moon, directly enters sleep at night, relies on a radioisotope to keep the internal circuit warm, and waits for the daytime to continue working. Therefore, an energy storage base is established on the moon, and the wireless charging mode is used to guarantee the power supply of the lunar rover at night, so that the working time of the lunar rover can be greatly increased, and the moon exploration process can be accelerated.

[0004] During the non-charging period of the lunar rover, the vehicle-mounted charger can be used as a magnetic field generating device to assist metal detection. Therefore, the application aims to provide a vehicle-mounted wireless charging system and metal detection shared device and technology for the lunar rover, expand the function of the wireless charging equipment, and increase the overall system integration of the lunar rover. SUMMARY

[0005] The application provides a vehicle-mounted wireless charging system and metal detection shared device and a metal detection method for the lunar rover, which is used for taking the vehicle-mounted wireless charger of the lunar rover as a metal detector in the non-charging working condition.

[0006] The application is achieved by the following technical scheme:

[0007] A vehicle-mounted wireless charging system and metal detection shared device for the lunar rover, the shared device comprising a vehicle-mounted battery, a controllable rectifier, a receiving end compensation network, a receiving coil, a data acquisition unit and a data analysis and processing unit,

[0008] The vehicle-mounted battery is connected with the controllable rectifier, the controllable rectifier is connected with the receiving end compensation network, and the receiving end compensation network is connected with the receiving coil and the data acquisition unit respectively;

[0009] The data acquisition unit is connected with the data analysis and processing unit, and the detection result is output.

[0010] Further, a bidirectional DC converter can be added between the vehicle-mounted battery and the controllable rectifier.

[0011] Further, in the charging working condition, the controllable rectifier normally works in the rectification mode, converts the high-frequency alternating current input transmitted by the receiving end compensation network into a direct current output to charge the battery.

[0012] Further, in the metal detection working condition, the vehicle-mounted battery is used as the power supply, the controllable rectifier reversely generates a high-frequency excitation, and the metal detection work is completed by means of the active excitation magnetic field of the receiving coil.

[0013] A metal detection method of a vehicle-mounted wireless charging system and a metal detection shared device suitable for a lunar rover,

[0014] Step 1: switch the system to the metal detection mode, and switch the energy transmission compensation topology to the metal detection topology;

[0015] Step 2: the full-bridge controllable rectifier control starts, and an input high-frequency excitation signal is started;

[0016] Step 3: the system continuously samples and processes the voltage and current at the port of the compensation network, extracts the amplitude and phase information, and solves the impedance.

[0017] Step 4: the processor internally classifies the algorithm, analyzes whether there is metal, and outputs the result.

[0018] Further, the device completes the metal detection by measuring the port impedance of the receiving end compensation network, that is, the receiving coil generates a magnetic field, and when metal appears, the metal will affect the coil magnetic field, thereby affecting the impedance of the coil; therefore, under this condition, the impedance in the compensation network is measured to detect whether there is metal;

[0019] The device adopts a voltage and current sensor to measure the voltage and current signals of the measured port, and obtains the amplitude and phase of the measured signal through signal processing means, and then deduces the port impedance; the real part, imaginary part and phase information of the port impedance are used to complete the metal substance existence discrimination.

[0020] Further, the controllable rectifier can be a full-bridge rectifier, the receiving end compensation network selects an LCL type compensation, and is switched to parallel compensation when metal detection.

[0021] The beneficial effects of the present application are:

[0022] The present application is used for taking the vehicle-mounted wireless charger of the lunar rover as a metal detector in a non-charging working condition.

[0023] The present application is realized based on a wireless charging device with a controllable rectifier on the secondary side, in the working condition requiring metal detection, the controllable rectifier reversely generates a high-frequency excitation, a high-frequency magnetic field is generated in the receiving coil, then a test point is selected at the port of the receiving end compensation network, the voltage and current are detected, and then the metal detection is completed through data processing analysis. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the system structure of the present invention.

[0026] Figure 3 This is a diagram of the metal detection method based on compensated network port impedance of the present invention.

[0027] Figure 4 This is a specific circuit diagram of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] A shared device for a lunar rover's onboard wireless charging system and metal detection system, comprising an onboard battery, a controllable rectifier, a receiver compensation network, a receiving coil, a data acquisition unit, and a data analysis and processing unit.

[0030] The vehicle battery is connected to a controllable rectifier, the controllable rectifier is connected to a receiving compensation network, and the receiving compensation network is connected to the supply receiving coil and the data acquisition unit respectively.

[0031] The data acquisition unit is connected to the data analysis and processing unit, and outputs the detection results.

[0032] The data acquisition unit transmits the acquired voltage and current to the data analysis and processing unit for impedance analysis and outputs the detection results.

[0033] This is achieved using a wireless charging device with a controllable rectifier on the secondary side. When metal detection is required, the device is powered by the vehicle battery. The controllable rectifier generates a high-frequency excitation in reverse, which generates a high-frequency magnetic field in the receiving coil. Then, a test point is selected at the compensation network port of the receiving end to detect the voltage and current. Finally, the data is processed and analyzed to complete the metal detection.

[0034] Furthermore, a bidirectional DC converter can be added between the vehicle battery and the controllable rectifier. If the DC converter used at the receiving end of the charging system is a bidirectional DC converter, it should ensure that the wireless charging receiving side can provide reverse excitation.

[0035] Further, in the charging working condition, the controllable rectifier works in the rectification mode normally, and converts the high-frequency alternating current input transmitted by the receiving end compensation network into direct current output to charge the battery.

[0036] Charging state

[0037] When the lunar rover is in the wireless charging, the device enters the charging working state, the high-frequency magnetic field is excited by the transmitting end, the energy from the transmitting end is received by the receiving coil, the reactive power compensation is completed through the compensation network, and the power conversion is completed through the controllable rectifier and the DC converter, and finally the battery is charged.

[0038] Further, in the metal detection working condition, the controllable rectifier generates high-frequency excitation in reverse, and the metal detection work is completed with the help of the active excitation magnetic field of the receiving coil.

[0039] Metal detection state

[0040] When the lunar rover is not in the charging process and needs to perform the metal detection, the device enters the metal detection state, the battery is reversely powered, the controllable rectifier is adjusted to work as an inverter, a reverse high-frequency excitation signal is generated, and whether the metal exists or not is judged through impedance measurement and analysis of the compensation network.

[0041] The above two working states cannot coexist, and the device switches states according to the functional needs of the lunar rover.

[0042] A metal detection method of a vehicle-mounted wireless charging system and a metal detection shared device suitable for a lunar rover,

[0043] Step 1: switch the system to the metal detection mode, close the switch S1, and switch the compensation topology to the parallel topology to prevent magnetic field interference caused by the compensation inductance of the magnetic integration;

[0044] Step 2: control the full-bridge controllable rectifier to start, and input a high-frequency excitation signal;

[0045] Step 3: the system continuously samples the voltage and current at the port of the compensation network, performs fast Fourier transform on the sampling sequence, extracts amplitude and phase information, and solves the impedance.

[0046] Step 4: analyze whether there is metal through the classification algorithm in the FPGA, and output the result.

[0047] Further, the device completes the metal detection by measuring the port impedance of the receiving end compensation network, that is, a magnetic field is generated in the receiving coil, and when metal substances appear, the metal substances will affect the coil magnetic field, thereby affecting the impedance of the coil; therefore, under this condition, the impedance in the compensation network is measured to detect whether there are metal substances;

[0048] The device measures the voltage and current signals of the measured port by using a voltage and current sensor, and obtains the amplitude and phase of the measured signal through signal processing means, and further derives the port impedance; the existence of metal substances is determined by using the real part, imaginary part and phase information of the port impedance, and can be completed by means of intelligent classification algorithm.

[0049] Further, the controllable rectifier is a full-bridge rectifier, the receiving end compensation network selects LCL type compensation, a high-voltage differential voltage sensor and a current transformer are used for voltage and current data sampling, and an FPGA is used as a data analysis and processing unit.

Claims

1. A shared device for an onboard wireless charging system and metal detection system suitable for lunar rovers, characterized in that, The shared device includes an on-board battery, a controllable rectifier, a receiver compensation network, a receiving coil, a data acquisition unit, and a data analysis and processing unit. The vehicle battery is connected to a controllable rectifier, the controllable rectifier is connected to a receiving compensation network, and the receiving compensation network is connected to the supply receiving coil and the data acquisition unit respectively. The data acquisition unit is connected to the data analysis and processing unit and outputs the detection results; A bidirectional DC converter can be added between the vehicle battery and the controllable rectifier; During charging, the controllable rectifier operates in rectification mode, converting the high-frequency AC input transmitted by the receiving compensation network into DC output to charge the battery. In metal detection mode, the vehicle battery is used as the power source, and the controllable rectifier generates high-frequency excitation in reverse. The metal detection work is completed by the active excitation magnetic field of the receiving coil.

2. The metal detection method for a shared device for an onboard wireless charging system and a metal detector for a lunar rover, as described in claim 1, is characterized in that... Step 1: Switch the system to metal detection mode and switch the power compensation topology to metal detection topology; Step 2: Start the full-bridge controllable rectifier control by inputting a high-frequency excitation signal; Step 3: The system continuously samples and processes voltage and current at the compensation network port, extracts amplitude and phase information, and solves for impedance; Step 4: Analyze the presence or absence of metal using the classification algorithm inside the processor, and output the results.

3. The metal detection method for a shared device for an onboard wireless charging system and a metal detector for a lunar rover, as described in claim 2, is characterized in that... The device performs metal detection by measuring the port impedance of the compensation network at the receiving end. That is, a magnetic field is generated in the receiving coil, and when a metal substance is present, the metal substance will affect the magnetic field of the coil, thereby affecting the impedance of the coil. Therefore, under this condition, measuring the impedance in the compensation network can detect whether there is a metal substance. The proposed device uses voltage and current sensors to measure the voltage and current signals of the port under test, and obtains the amplitude and phase of the measured signal through signal processing, thereby deriving the port impedance; the real part, imaginary part and phase information of the port impedance are used together to determine the presence of metallic substances.

4. The metal detection method for a shared device for an onboard wireless charging system and a metal detector for a lunar rover, as described in claim 2, is characterized in that... The controllable rectifier can be a full-bridge rectifier, the receiving end compensation network is selected as LCL type compensation, and it is switched to parallel compensation when metal detection is performed.

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