Receiver for radio frequency magnetotelluric detection

Abstract

The utility model discloses a receiver for radio frequency magnetotelluric detection, which comprises a receiver box panel and a circuit board arranged on the inner side of the receiver box panel, and the receiver box panel is provided with an electric field connector and a magnetic field connector; the electric field connector is connected to the electric field pre-amplification module, and the electric field pre-amplification module is connected with the electric field antenna; the magnetic field connector is connected to the triaxial magnetic bar; the circuit board comprises a filter circuit, a gain control circuit, an AD acquisition circuit, a core control circuit and a solid state disk; the filter circuit is connected to the electric field connector and the magnetic field connector through the voltage follower, the gain control circuit is connected with the filter circuit, the AD acquisition circuit is connected with the gain control circuit, and the filter circuit, the gain control circuit, the AD acquisition circuit and the solid state disk are all connected with the core control circuit. By means of the scheme, the electric field high-frequency signals and the magnetic field high-frequency signals can be collected, and details of the collected electric field signals and the magnetic field signals can be recognized more finely.

Description

TECHNICAL FIELD

[0001] The utility model generally relates to electromagnetic measurement technical field. More specifically, the utility model relates to a kind of for radio frequency geoelectric electromagnetic detection receiver. BACKGROUND

[0002] Radio frequency geoelectric electromagnetic measurement system receiver is mainly used to detect underground structure and geological features. It obtains the conductivity distribution information of underground medium by analyzing the response of electromagnetic wave when propagating underground. It has important role for finding mineral resources, underground water, oil and gas and carrying out geological disaster monitoring.

[0003] However, radio frequency geoelectric electromagnetic measurement system receiver in prior art has low data sampling rate, insufficient sampling accuracy, insufficient storage capacity, fixed data storage format, short system standby time and other problems.

[0004] Therefore, it is urgent to provide a radio frequency geoelectric electromagnetic detection scheme to collect high-frequency signals of geoelectric field and magnetic field, more finely identify signal details, store more data, and make it more convenient to charge receiver and work longer. UTILITY MODEL CONTENT

[0005] In order to solve one or more technical problems mentioned above, the utility model provides the following scheme in multiple aspects.

[0006] The utility model provides a kind of for radio frequency geoelectric electromagnetic detection receiver, including receiver box panel and the circuit board being set in the inner side of receiver box panel, electric field connector and magnetic field connector are provided on the receiver box panel;Electric field connector is connected to electric field preamplifier module by electric field cable, multiple sockets are provided on the electric field preamplifier module, and electric field antenna is respectively inserted in the multiple sockets;Magnetic field connector is connected to three-axis magnetic bar by magnetic field cable;The circuit board includes filter circuit, gain control circuit, AD acquisition circuit, core control circuit and solid state disk;Filter circuit is connected to the electric field connector and the magnetic field connector by voltage follower, the gain control circuit is connected with the filter circuit, the AD acquisition circuit is connected with the gain control circuit, and the filter circuit, the gain control circuit, the AD acquisition circuit and the solid state disk are all connected with the core control circuit.

[0007] In some embodiments, the electric field preamplifier module includes a module housing, and a signal processing circuit, a module power supply circuit and a module interface circuit arranged in the module housing, the module power supply circuit and the module interface circuit are connected with the signal processing circuit, and the module interface circuit is connected with the module power supply circuit.

[0008] In some embodiments, the receiver box panel is further provided with a GPS receiving port, a network port and a charging port; a GPS module is inserted into the GPS receiving port; a network cable is inserted into the network port, and the network cable is connected to an upper computer; a charging cable is inserted into the charging port, and the charging cable is connected to a power adapter.

[0009] In some embodiments, the receiver box panel is further provided with a display screen, a key group, a switch and a plurality of indicator lights.

[0010] In some embodiments, the receiver box panel is further provided with a debugging port.

[0011] In some embodiments, the core control circuit adopts a ZYNQ control circuit.

[0012] In some embodiments, the circuit board further comprises a GPS time-providing circuit, a network port circuit and a buzzer, wherein the buzzer, the GPS time-providing circuit and the network port circuit are connected to the core control circuit, the GPS time-providing circuit is connected to the GPS receiving port, and the network port circuit is connected to the network port.

[0013] In some embodiments, the circuit board further comprises a power supply circuit, a lithium battery and a power management circuit, wherein the power supply circuit is connected to the lithium battery, the power supply circuit and the lithium battery are both connected to the power management circuit, the power management circuit is connected to the charging port, and the power supply circuit is connected to the core control circuit, the solid state disk, the GPS time-providing circuit, the network port circuit and the buzzer.

[0014] By means of the radio frequency magnetotelluric sounding receiver provided above, the filter circuit, the gain control circuit and the AD acquisition circuit can acquire electric field high frequency signals and magnetic field high frequency signals, and can more finely identify details of the acquired electric field signals and magnetic field signals; meanwhile, the solid state disk can store more data. Further, in some embodiments, by means of the power supply circuit, the lithium battery and the power management circuit, the receiver can be more conveniently charged and can work for a longer time. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which a number of embodiments of the application are illustrated by way of example, and in which:

[0016] Figure 1 An exemplary composition diagram of the radio frequency magnetotelluric sounding receiver according to an embodiment of the present application is shown;

[0017] Figure 2 A schematic diagram of a receiver box panel is shown in the embodiment of the present application.

[0018] Figure 3 An exemplary composition diagram of a circuit board is shown in the embodiment of the present application.

[0019] Figure 4 An exemplary composition diagram in the electric field preamplification module is shown in the embodiment of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0021] It should be understood that the terms "include" and "contain" used in the specification and claims of the present application indicate the existence of the described features, whole, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0022] It should also be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0023] The specific embodiments of the present application will be described in detail below with reference to the drawings.

[0024] In the prior art, the radio frequency ground electromagnetic measurement system has low data sampling rate, insufficient sampling precision and unclear high frequency sampling signal details. At the same time, the hard disk used is small, so that the system data storage points are less. In addition, it is limited by the original file storage format, and the data analysis is relatively troublesome when secondary development is carried out. Further, the user is limited by the small battery capacity of the receiver when used outdoors for a long time, and needs to be charged frequently, and the charger needs a special charging head, which is not convenient for outdoor use.

[0025] Therefore, the radio frequency ground electromagnetic detection scheme can more finely identify details of collected electric field signals and magnetic field signals, can store more times of data, and can make the receiver more convenient to charge and work for a longer time.

[0026] Figure 1 An exemplary component structure diagram of the radio frequency ground electromagnetic detection receiver is shown.

[0027] As Figure 1 shown, the radio frequency ground electromagnetic detection receiver includes a receiver box panel 1 and a circuit board 2 arranged on the inner side of the receiver box panel, and the receiver box panel 1 is provided with an electric field connector 11 and a magnetic field connector 12; the electric field connector 11 is connected to an electric field preamplification module 4 through an electric field cable 3, a plurality of sockets are arranged on the electric field preamplification module 4, and an electric field antenna 5 is inserted into each socket; the magnetic field connector 12 is connected to a three-axis magnetic rod 7 through a magnetic field cable 6; the circuit board 2 includes a filter circuit 21, a gain control circuit 22, an AD acquisition circuit 23, a core control circuit 24, and a solid state disk 25; the filter circuit 21 is connected to the electric field connector 11 and the magnetic field connector 12 through a voltage follower, the gain control circuit 22 is connected to the filter circuit 21, the AD acquisition circuit 23 is connected to the gain control circuit 22, and the filter circuit 21, the gain control circuit 22, the AD acquisition circuit 23, and the solid state disk 25 are all connected to the core control circuit 24.

[0028] In the embodiment of the present application, the receiver box shell can adopt a portable IP67 waterproof and dustproof openable case to protect the circuit board 2 arranged inside.

[0029] In the embodiment of the present application, the electric field connector 11 is used to receive an analog signal from an electric field, the magnetic field connector 12 is used to receive an analog signal from a magnetic field, and the analog signal is sent to the filter circuit 21 after passing through the voltage follower. The voltage follower has high input impedance and low output impedance, which can ensure that the signal acquired by the magnetic field connector 12 is not affected by the load, and can effectively drive the filter circuit 21.

[0030] In the embodiment of the present application, in addition to the electric field connector 11 and the magnetic field connector 12 arranged on the receiver box panel 1, other connectors are also arranged, and related interfaces, indicator lights, display screens, keys, etc. are also arranged. Figure 2 The receiver box panel 1 will be described in detail below.

[0031] Figure 2 An exemplary component structure diagram of the radio frequency ground electromagnetic detection receiver is shown.

[0032] As Figure 2As shown, in addition to the electric field connector 11 and the magnetic field connector 12, a plurality of interfaces 13, a display screen 14, a key group 15, a switch 16 and a plurality of indicator lights 17 are arranged on the receiver box panel 1.

[0033] Specifically, the plurality of interfaces 13 include a GPS receiving port 131, a network port 132, a charging port 133 and a debugging port 134.

[0034] In the embodiment of the present application, a GPS module is inserted into the GPS receiving port 131 to receive signals from global positioning system (GPS) satellites to determine the location information of the receiver. Such location information can be used for navigation, tracking, time synchronization, etc. Specifically, the GPS module can include an antenna, a radio frequency front end, a baseband processor, a microcontroller, a memory, etc. The antenna is used to capture radio signals from GPS satellites, the radio frequency front end is used to process the radio signals sent by the antenna and convert them into digital signals, the baseband processor is used to decode the digital signals and extract information such as orbit parameters sent by the satellites, the microcontroller is used to control the operation of the entire module, perform positioning algorithms, communicate with the host device, etc., and the memory is used to store firmware code, satellite ephemeris data, etc.

[0035] In the embodiment of the present application, a network cable is inserted into the network port 132 and connected to the upper computer, so as to realize efficient data exchange between the receiver and the upper computer and realize the monitoring and management of the receiver by the upper computer. The data exchanged between the receiver and the upper computer can include sensor data, control instructions, files, etc. During the monitoring and management of the receiver by the upper computer, the upper computer can monitor the state information of the receiver in real time, such as working state, running parameters, etc., and can remotely send commands to control or adjust the settings of the receiver.

[0036] In some embodiments of the present application, the network port 132 can adopt an RJ45 network port. In other embodiments of the present application, the network port 132 can also adopt other network ports, which are not limited herein.

[0037] In the embodiment of the present application, a charging cable is inserted into the charging port 133 and connected to a power adapter, so as to charge the receiver and provide power for the receiver.

[0038] In some embodiments of the present application, the charging port 133 adopts a Type-C charging port, at this time, the charging cable can adopt a Type-C charging cable and the power adapter adopts a Type-C power adapter. Since the Type-C charging port is more universally applicable, it can make the charging of the receiver more convenient

[0039] In the embodiments of the present application, by setting the debugging port 134, when it is needed to troubleshoot, optimize performance and test functions of the software system at a later stage, the debugging port 134 can be connected to the host computer through a transmission line, and the information output by the receiver can be viewed through the host computer. Specifically, the debugging port 134 can adopt a serial port, a USB port or an Ethernet port, which is not limited in the present application.

[0040] In the embodiments of the present application, the display screen 14 can adopt an LCD display screen, a TFT display screen, an OLED display screen, an HDMI display screen, a DP display screen, etc., which is not limited in the present application. By adopting the display screen 14, the relevant information of the receiver can be viewed.

[0041] In the embodiments of the present application, the key group 15 can adopt a thin film key, which can include a number key and a function key. Through the key group 15, the user can input the parameter configuration information and system control information of the receiver, etc.

[0042] In the embodiments of the present application, the switch 16 is used to control the opening and closing of the receiver.

[0043] In some embodiments of the present application, the plurality of indicator lights 17 include a state indicator light 171, a GPS indicator light 172, a network port indicator light 173 and a power indicator light 174. In other embodiments of the present application, in addition to the state indicator light 171, the GPS indicator light 172, the network port indicator light 173 and the power indicator light 174, the plurality of indicator lights 17 can also include other indicator lights, which are not limited in the present application.

[0044] Specifically, the state indicator light 171 is used to indicate the state of the receiver. For example, when the receiver receives data, the state indicator light 171 is lit and the color is red; when the receiver completes data reception, the state indicator light 171 is lit and the color is green. In the embodiments of the present application, other lighting methods and other colors can also be used to represent the state of the receiver, which is not limited in the present application.

[0045] Specifically, the GPS indicator light 172 is used to indicate the GPS connection state. For example, when the GPS connection is successful, the GPS indicator light 172 is lit and the color is green; when the GPS connection fails or is not connected, the GPS indicator light 172 is lit and the color is red. In the embodiments of the present application, other lighting methods and other colors can also be used to represent the GPS connection state, which is not limited in the present application.

[0046] Specifically, the network port indicator light 173 is used to indicate the network connection status. For example, when the network connection is successful, the network port indicator light 173 is illuminated in green; when the network connection fails or is not connected, the network port indicator light 173 is illuminated in red. In the embodiments of the present application, other lighting methods and other colors may be used to indicate the network connection status, and this application is not limited thereto.

[0047] Specifically, power indicator light 174 is used to indicate the charging status. For example, when charging is complete, power indicator light 174 illuminates green; when charging is not complete, power indicator light 174 illuminates red; when charging is not complete, power indicator light 174 is not illuminated. In the embodiments of the present application, other lighting methods and other colors may be used to indicate the charging status, and this application is not limited thereto.

[0048] In the embodiment of the present application, the circuit board 2 includes not only the filter circuit 21, the gain control circuit 22, the AD acquisition circuit 23, the core control circuit 24 and the solid state drive 25, but also other circuits. Figure 3 The specific components of the circuit board 2 are described in detail.

[0049] Figure 3 FIG. 2 shows an exemplary composition diagram of the circuit board 2 according to an embodiment of the present invention.

[0050] like Figure 3 As shown, in addition to the filter circuit 21, gain control circuit 22, AD acquisition circuit 23, core control circuit 24, and solid-state drive 25, circuit board 2 also includes a GPS timing circuit 26, a network port circuit 27, a buzzer 28, and power-related circuits 29. Specifically, power-related circuits 29 include a power supply circuit 291, a lithium battery 292, and a power management circuit 293.

[0051] In an embodiment of the present application, the filter circuit 21 may employ 10 filter circuits, each of which may be a bandpass filter. The filter circuit 21 is configured to filter the electric field analog signal and the magnetic field analog signal to remove noise. Specifically, because the filter circuit 21 can filter at two different frequency bands, the electric field analog signal and the magnetic field analog signal can be filtered separately as needed.

[0052] In the embodiment of the present application, the gain control circuit 22 uses 10 gain control circuits, each of which is input from a corresponding filter circuit. The gain control circuit 22 is used to gain control the filtered electric field analog signal and magnetic field analog signal to obtain the required waveform.

[0053] In the embodiment of the present application, the AD acquisition circuit 23 adopts a 10-way AD acquisition circuit, the input of each AD acquisition circuit comes from the corresponding gain control circuit, and 5-way low frequency and 5-way high frequency are sampled at the same time. Each AD acquisition circuit adopts a high-speed ADC chip, and the sampling rate reaches 4Mb / s. The AD acquisition circuit 23 is used to convert the analog signal after filtering and gain control into a digital signal and send it to the core control circuit 24.

[0054] In the embodiment of the present application, through the interaction of the filtering circuit 21, the gain control circuit 22 and the AD acquisition circuit 23, since each AD acquisition circuit adopts a high-speed ADC chip, the electric field high-frequency signal and the magnetic field high-frequency signal can be collected. At the same time, since the AD acquisition circuit 23 is used for digital signal acquisition after filtering and gain control, the details of the collected electric field signal and magnetic field signal can be identified more finely.

[0055] In the embodiment of the present application, the core control circuit 24 can adopt a ZYNQ control circuit. The ZYNQ control circuit has two functional blocks of PS (Processing System) and PL (Programmable Logic).

[0056] Specifically, the PS functional block of the ZYNQ control circuit can adopt a dual-core ARM Cortex-A9 processor, which is used to be responsible for system control, data processing, communication and other tasks. The PL functional block of the ZYNQ control circuit can adopt an FPGA logic unit to realize the control of each module. The ZYNQ control circuit as the core of the receiving circuit system is used to control the analog switch to switch the bandpass filter of different frequency bands for the filtering circuit 21, to configure different gains for the gain control circuit 22, and to synchronously control, collect data and store to the solid state disk 25 hung under the high-speed interface for the AD acquisition circuit 23.

[0057] In the embodiment of the present application, the solid state disk 25 can adopt an mSATA hard disk, which has a capacity of 512GB and a cache of 512M, and the read rate is 510MB / s and the write rate is 360MB / s. By adopting a solid state disk, more data can be stored.

[0058] In the embodiment of the present application, the GPS time control circuit 26, the network port circuit 27 and the buzzer 28 are all connected to the aforementioned core control circuit 24, the GPS time control circuit 26 is connected to the aforementioned GPS receiving port 131, and the network port circuit 27 is connected to the aforementioned network port 132.

[0059] In the embodiment of the present application, the GPS timing circuit 26 is used to send the position information of the receiver to the core control circuit 24, and the network interface circuit 27 is used to transmit the information sent by the host computer to the core control circuit 24, and the core control circuit 24 sends the corresponding information to the host computer.

[0060] In the embodiment of the present application, the buzzer 28 is used to alarm under the control of the core control circuit 24 when the receiver fails.

[0061] In the embodiment of the present application, the core control circuit 24 can also control the aforementioned display screen 14 and receive the information input through the key group 15. Through the interaction between the core control circuit 24, the aforementioned display screen 14, the key group 15, the AD acquisition circuit 23 and the network interface circuit 27, the data acquisition, data recovery and hibernation can be realized.

[0062] Specifically, in the implementation of data acquisition, the core control circuit 24 starts the AD acquisition function of the PL (Programmable Logic, programmable logic) function block through the PS (Processing System, processing system) function block, the PL (Programmable Logic, programmable logic) function block controls the AD acquisition circuit 23 to acquire the electric field digital signal and the magnetic field digital signal, and then stores the data in the DDR3. The core control circuit 24 notifies the PS function block of the data half-full and full state by interrupting the PL function block, and then the PS function block controls the PL function block to read and write the SSD to store the data in the SSD. At the same time, the core control circuit 24 controls the display screen 14 to display the prompt information of the data acquisition.

[0063] Specifically, in the implementation of data recovery, the core control circuit 24 receives the control information input through the key group 15, the core control circuit 24 controls the display screen 14 to display the data of the currently stored file and the storage time of the file, and then the core control circuit 24 controls to start the network server and then controls the network interface circuit 27 to send the file to the host computer through the network. The host computer can analyze the current data through the corresponding analysis software.

[0064] Specifically, in the hibernation, at this time, data acquisition is not required, the core control circuit 24 controls the clock frequency of the system to be reduced, and keeps sleeping to reduce the power consumption of the system.

[0065] In the embodiment of the present application, the power supply circuit 291 is connected with the lithium battery 292, and the power supply circuit 291 and the lithium battery 292 are both connected with the power management circuit 293, and the power management circuit 293 is connected with the aforementioned charging port 133, and the power supply circuit 291 is connected with the aforementioned core control circuit 24, solid state disk 25, GPS timing circuit 26, network port circuit 27, and buzzer 28.

[0066] In the embodiment of the present application, the power management circuit 293 receives external power input through the charging port 133, and then outputs stable power to the power supply circuit 291 and / or the lithium battery 292. Specifically, in the case that the lithium battery 292 is fully charged and the power management circuit 293 receives external power input, the power management circuit 293 outputs stable power to the power supply circuit 291. Specifically, in the case that the lithium battery 292 is not fully charged and the power management circuit 293 receives external power input, the power management circuit 293 outputs stable power to the power supply circuit 291 and the lithium battery 292.

[0067] In the embodiment of the present application, in the case that the power management circuit 293 receives external power input, the power supply circuit 291 provides the stable power output by the power management circuit 293 to the aforementioned core control circuit 24, solid state disk 25, GPS timing circuit 26, network port circuit 27, and buzzer 28.

[0068] In the embodiment of the present application, in the case that the power management circuit 293 does not receive external power input, the lithium battery 292 provides the stable power output by the power management circuit 293 to the power supply circuit 291, and the power supply circuit 291 supplies power to the core control circuit 24, solid state disk 25, GPS timing circuit 26, network port circuit 27, and buzzer 28.

[0069] In the embodiment of the present application, through the power supply circuit 291, lithium battery 292, and power management circuit 293, it can be ensured that the receiver is powered by external power supply when it is in normal operation, and is powered by lithium battery when the external power supply is disconnected. At the same time, by using a large-capacity lithium battery 292, the long-time use requirement of customers can be met.

[0070] In the embodiment of the present application, the specific composition of the aforementioned pre-amplification module 4 can be referred to Figure 4 . As shown in Figure 4 , the pre-amplification module 4 includes a shell 41 and a signal processing circuit 42, a module power supply circuit 43, and a module interface circuit 44 arranged in the module shell 41.

[0071] In the embodiments of the present application, the module power supply circuit 43 and the module interface circuit 44 are connected with the signal processing circuit 42, and the module interface circuit 44 is connected with the module power supply circuit 43. Specifically, the module power supply circuit 43 is used to convert the external power supply into a corresponding stable power supply to provide the signal processing circuit 42 and the module interface circuit 44. The module interface circuit 44 is used to realize the connection with the aforementioned filter circuit 21, and the signal processing circuit 42 is used to filter, amplify, and convert the signal input by the electric field antenna 5, and provide the processed signal to the filter circuit 21 through the module interface circuit 44.

[0072] In the embodiments of the present application, the aforementioned electric field antenna 5 can adopt four electric field antennas, which form two pairs of differential analog signals, and the two pairs of differential analog signals are converted into two single-ended analog signals in the aforementioned preamplifier module 4. Specifically, the signal processing circuit 42 in the preamplifier module 4 converts the differential analog signal into a single-ended analog signal.

[0073] Since the filter circuit 21, the gain control circuit 22, and the AD acquisition circuit 23 only support single-ended input, it is necessary to convert the differential signal into a single-ended signal through the preamplifier module 4 for processing.

[0074] Correspondingly, the number of sockets on the aforementioned preamplifier module 4 is four, which is used to receive the signals from the four electric field antennas.

[0075] In some embodiments of the present application, the socket on the preamplifier module 4 is a banana socket. In other embodiments of the present application, the socket on the preamplifier module 4 can also adopt other types of sockets, which are not limited in the present application.

[0076] In summary, through the radio frequency magnetotelluric detection receiver provided as above, the electric field high-frequency signal and the magnetic field high-frequency signal can be acquired through the filter circuit, the gain control circuit, and the AD acquisition circuit, and the details of the acquired electric field signal and magnetic field signal can be more finely identified. At the same time, the solid state disk can store more data. Further, in some embodiments, through the power supply circuit, the lithium battery, and the power management circuit, the receiver can be charged more conveniently and work for a longer time.

[0077] Although the embodiments of the present application have been shown and described herein, it should be apparent to those skilled in the art that the embodiments are provided by way of example. Many changes, modifications and substitutions can be made by one of ordinary skill in the art without departing from the spirit and scope of the present application. It should be understood that in the process of practicing the present application, various alternatives to the embodiments described herein can be employed. The appended claims are intended to cover such alternatives and equivalents.

Claims

1. A receiver for radio frequency magnetotelluric detection, comprising a receiver chassis panel and a circuit board arranged inside the receiver chassis panel, characterized in that: An electric field connector and a magnetic field connector are provided on the receiving chassis panel; The electric field connector is connected to the electric field preamplifier module via an electric field cable. The electric field preamplifier module is provided with a plurality of sockets, and the plurality of sockets are respectively inserted into the electric field antennas; The magnetic field connector is connected to the three-axis magnetic bar via a magnetic field cable; The circuit board includes a filter circuit, a gain control circuit, an AD acquisition circuit, a core control circuit and a solid state hard disk; The filter circuit is connected to the electric field connector and the magnetic field connector through a voltage follower, the gain control circuit is connected to the filter circuit, the AD acquisition circuit is connected to the gain control circuit, and the filter circuit, the gain control circuit, the AD acquisition circuit and the solid-state hard drive are all connected to the core control circuit.

2. The radio frequency magnetotelluric detection receiver according to claim 1, characterized in that: The electric field preamplifier module includes a module housing and a signal processing circuit, a module power supply circuit and a module interface circuit arranged in the module housing. The module power supply circuit and the module interface circuit are both connected to the signal processing circuit, and the module interface circuit is connected to the module power supply circuit.

3. The radio frequency magnetotelluric detection receiver according to claim 1, characterized in that: The receiver box panel is also provided with a GPS receiving port, an Internet port and a charging port; A GPS module is inserted into the GPS receiving port; A network cable is inserted into the network port, and the network cable is connected to the host computer; A charging cable is inserted into the charging port, and the charging cable is connected to a power adapter.

4. The radio frequency magnetotelluric detection receiver according to claim 3, characterized in that: The receiving box panel is also provided with a display screen, a button group, a switch and a plurality of indicator lights.

5. The radio frequency magnetotelluric detection receiver according to claim 4, characterized in that: A debugging port is also provided on the receiving chassis panel.

6. The radio frequency magnetotelluric detection receiver according to claim 1, characterized in that: The core control circuit adopts ZYNQ control circuit.

7. The radio frequency magnetotelluric detection receiver according to claim 3, characterized in that: The circuit board also includes a GPS timing circuit, a network port circuit and a buzzer. The buzzer, the GPS timing circuit and the network port circuit are all connected to the core control circuit. The GPS timing circuit is connected to the GPS receiving port, and the network port circuit is connected to the network port.

8. The radio frequency magnetotelluric detection receiver according to claim 7, characterized in that: The circuit board also includes a power supply circuit, a lithium battery and a power management circuit. The power supply circuit is connected to the lithium battery. The power supply circuit and the lithium battery are both connected to the power management circuit. The power management circuit is connected to the charging port. The power supply circuit is connected to the core control circuit, the solid-state hard drive, the GPS timing circuit, the network port circuit and the buzzer.

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