Electromagnetic exploration receiving device, main unit and system

Abstract

This application discloses an electromagnetic exploration receiving device, host, and system. The electromagnetic exploration receiving device includes: a main controller; and multiple first-channel receiving units, each first-channel receiving unit including a first electrical channel, a magnetic channel, a switching switch, and a first signal processing module. The first electrical channel is connected to a first input terminal of the switching switch, the magnetic channel is connected to a second input terminal of the switching switch, the output terminal of the switching switch is connected to the input terminal of the first signal processing module, the output terminal of the first signal processing module is connected to the acquisition signal feedback terminal of the main controller, and the main controller is connected to the control terminal of the switching switch for switching the first electrical channel and magnetic channel according to the needs of electromagnetic exploration. This application can adapt to the receiving channel requirements of various exploration methods.

Description

Technical Field

[0001] This application relates to the field of geophysical exploration, and in particular to an electromagnetic exploration receiving device, host, and system. Background Technology

[0002] Electromagnetic exploration instruments are devices used for geophysical exploration, primarily for detecting underground geological structures and resource distribution. They operate based on the principle of electromagnetic induction, transmitting alternating electromagnetic fields into the subsurface via a transmitting device and receiving the responses of the subsurface medium to these electromagnetic fields to analyze the properties and structure of the subsurface materials.

[0003] In related technologies, electromagnetic exploration receiving devices can be classified into wide-area electromagnetic method receiving devices, audio-frequency magnetotelluric method receiving devices, and time-domain electromagnetic method receiving devices, depending on the electromagnetic method used. Different electromagnetic exploration receiving devices are configured with different types and numbers of receiving channels. For example, some exploration methods only require electrical channels, some only require magnetic channels, and some require both electrical and magnetic channels.

[0004] In the field of geophysical exploration, with the continuous improvement of exploration depth and accuracy requirements, traditional single-method geophysical exploration instruments are no longer sufficient to meet the exploration needs under complex geological conditions. The drawback of existing electromagnetic exploration receiving devices is that the number of electric and magnetic channels is configured for a single exploration method, resulting in limited functionality and an inability to adapt to the exploration needs of multiple methods. Utility Model Content

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an electromagnetic exploration receiving device, host, and system that can adapt to the receiving channel requirements of various exploration methods.

[0006] An electromagnetic exploration receiving apparatus according to a first aspect embodiment of this application includes:

[0007] Main controller;

[0008] Multiple first-channel receiving units are provided. Each first-channel receiving unit includes a first electrical channel, a magnetic channel, a switching switch, and a first signal processing module. The first electrical channel is connected to the first input terminal of the switching switch, the magnetic channel is connected to the second input terminal of the switching switch, the output terminal of the switching switch is connected to the input terminal of the first signal processing module, the output terminal of the first signal processing module is connected to the acquisition signal feedback terminal of the main controller, and the main controller is connected to the control terminal of the switching switch for switching the first electrical channel and the magnetic channel according to the needs of electromagnetic exploration.

[0009] According to some embodiments of this application, the first channel receiving unit further includes a grounding resistance measurement port, which is connected to the third input terminal of the switching switch.

[0010] According to some embodiments of this application, the first signal processing module includes a preamplifier, a notch filter, a programmable amplifier, and an analog-to-digital converter module. The output terminal of the switching switch is connected to the input terminal of the preamplifier, the output terminal of the preamplifier is connected to the input terminal of the notch filter, the output terminal of the notch filter is connected to the input terminal of the programmable amplifier, the output terminal of the programmable amplifier is connected to the input terminal of the analog-to-digital converter module, and the output terminal of the analog-to-digital converter module is connected to the acquisition signal feedback terminal of the main controller.

[0011] According to some embodiments of this application, the first signal processing module further includes a bandwidth switching module, which is disposed between the notch filter and the programmable amplifier.

[0012] According to some embodiments of this application, the electromagnetic exploration receiving device further includes one or more second channel receiving units, each second channel receiving unit including a second electrical channel and a second signal processing module. The second electrical channel is connected to the input terminal of the second signal processing module, and the output terminal of the second signal processing module is connected to the acquisition signal feedback terminal of the main controller.

[0013] According to some embodiments of this application, the electromagnetic exploration receiving device further includes a wireless communication module and / or a GPS module, which are connected to the main controller.

[0014] According to an embodiment of the second aspect of this application, the electromagnetic exploration receiving host includes:

[0015] A laptop computer, wherein the laptop computer is equipped with an electromagnetic exploration receiving device as described in the first aspect embodiment.

[0016] According to some embodiments of this application, the laptop computer is a ruggedized tri-proof laptop computer.

[0017] According to some embodiments of this application, the laptop is a three-screen laptop.

[0018] An electromagnetic exploration system according to a third aspect of this application includes an electromagnetic exploration transmitting device and an electromagnetic exploration receiving device, wherein the electromagnetic exploration receiving device is the electromagnetic exploration receiving device as described in the first aspect embodiment.

[0019] The electromagnetic exploration receiving device, host, and system according to the embodiments of this application have at least the following beneficial effects:

[0020] In this embodiment, multiple first-channel receiving units are provided, each equipped with a first electrical channel and a first magnetic channel. The main controller can switch between the first electrical channel and the first magnetic channel via a switching switch. The first signal processing module converts the received signal and inputs it to the main controller for subsequent analysis and processing. This application can realize the switching between electrical and magnetic channels, adapting to the receiving channel requirements of various exploration methods.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a schematic block diagram of the electromagnetic exploration receiving device in the embodiments of this application;

[0024] Figure 2 This is a schematic block diagram of the first channel receiving unit in an embodiment of this application;

[0025] Figure 3 This is a structural diagram of the electromagnetic exploration receiving host in the embodiments of this application;

[0026] Figure 4 This is a structural diagram of the electrical distribution box in an embodiment of this application.

[0027] Icon labels:

[0028] The system includes a main controller 100, a first channel receiving unit 200, a first electrical channel 210, a magnetic channel 220, a switching switch 230, a first signal processing module 240, a preamplifier 241, a notch filter 242, a programmable amplifier 243, an analog-to-digital converter module 244, a bandwidth switching module 245, a second channel receiving unit 250, a second electrical channel 251, a second signal processing module 252, a wireless communication module 260, a GPS module 270, a laptop computer 300, a junction box interface 310, a magnetic channel interface 320, and an electrical channel junction box 400. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0030] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0032] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0033] Reference Figure 1 As shown, an electromagnetic exploration receiving device includes: a main controller 100 and multiple first channel receiving units 200. Each first channel receiving unit 200 includes a first electrical channel 210, a magnetic channel 220, a switching switch 230, and a first signal processing module 240. The first electrical channel 210 is connected to the first input terminal of the switching switch 230, the magnetic channel 220 is connected to the second input terminal of the switching switch 230, the output terminal of the switching switch 230 is connected to the input terminal of the first signal processing module 240, the output terminal of the first signal processing module 240 is connected to the acquisition signal feedback terminal of the main controller 100, and the main controller 100 is connected to the control terminal of the switching switch 230 for switching the first electrical channel 210 and the magnetic channel 220 according to the needs of electromagnetic exploration.

[0034] In this embodiment, multiple first-channel receiving units 200 are provided, each equipped with a first electrical channel 210 and a magnetic channel 220. The main controller 100 can switch between the first electrical channel 210 and the magnetic channel 220 via a switching switch 230. The first signal processing module 240 converts the received signal and inputs it to the main controller 100 for subsequent analysis and processing. This application can realize the switching between electrical and magnetic channels, adapting to the receiving channel requirements of various exploration methods.

[0035] It should be noted that the electric channel refers to the signal channel connected to the electrodes, which acquires the electric field signal through the electrodes. The magnetic channel refers to the signal channel connected to the magnetic sensor, which acquires the magnetic field signal through the magnetic sensor. The difference between the electric and magnetic channels is that the electric channel directly acquires the electrode potential difference signal of the electric field, which can be directly acquired. However, because the magnetic sensor is a standard component and the magnetic induction signal is weak, the magnetic channel requires internal conditioning circuitry to amplify and process the magnetic signal. The magnetic channel is connected to a power supply for independent power supply. Therefore, the magnetic and electric channels need to be switched using a switch and cannot be connected to the first signal processing module 240 simultaneously. The acquisition channel of the entire first channel receiving unit 200 only switches at the signal input, and subsequently shares the signal processing section to maintain the consistency of the entire acquisition channel.

[0036] For example, refer to Figure 2 As shown, the main controller 100 switches between the electrical and magnetic tracks by controlling the switching switch 230, which includes switch S1 and switch S2. When switching the electrical track, switch S2 is closed and switch S1 is open. When switching the magnetic track, switch S1 is closed and switch S2 is open. The first signal processing module 240 performs analog-to-digital conversion on the exploration signals received from the electrical or magnetic tracks and then transmits them to the main controller 100. The main controller 100 can analyze the exploration signals or directly transmit them to a host computer or send them to an independent data processing module.

[0037] For example, the main controller 100 can communicate with the host computer via a network port and a USB port. The network port is mainly responsible for uploading internal multi-channel high-speed acquired time-domain data. Its high-speed data transmission capability can meet the needs of rapid transmission of large amounts of data, ensuring the real-time performance and integrity of the time-domain data. The USB port is responsible for transmitting control commands and setting parameters. Exploration personnel can send various control commands to the receiving system through the USB interface using the control software on the host computer.

[0038] It should be noted that the first channel receiving unit 200 can be set to two, three or more depending on the exploration method used as needed.

[0039] The following sections use Wide-area Electromagnetic Method (WFEM), Common Audio-Sound Magnetism (CSAMT), and Time-Frequency Electromagnetic Method (TFEM) as examples to illustrate the switching selection of the first channel receiving unit 200, as detailed below:

[0040] For example, the wide-area electromagnetic method (WEMA) is based on accurately solving the equations of underground electromagnetic waves, abandoning the simplification of traditional far-field assumptions, and strictly defining apparent resistivity to achieve accurate depth sounding over large areas. Its advantages lie in reducing boundary effect interference, high detection accuracy, and suitability for complex geology and deep exploration. It can accurately delineate the electrical structure of geological bodies, providing reliable data for exploration. WEMA can be divided into electrical and magnetic methods. Electrical methods require switching multiple electrical channels. Magnetic methods, if measuring a three-component magnetic signal, require switching three magnetic channels, such as Hx, Hy, and Hz. Depending on the method's requirements, electrical channels Ex or Ey may also need to be measured. Therefore, a maximum of five channels need to operate simultaneously, including three magnetic channels and two electrical channels.

[0041] For example, the audio-frequency magnetotelluric method measures the electric and magnetic field responses of underground media at various frequencies by artificially transmitting alternating electromagnetic fields of different frequencies. The audio-frequency magnetotelluric method can be divided into three modes: scalar measurement, four-component vector measurement, and five-component vector measurement. Variable measurement requires switching at least one electric channel Ex and one magnetic channel Hy. Four-component vector measurement requires switching two electric channels Ex and Ey and two magnetic channels Hx and Hy. Five-component vector measurement requires switching two electric channels Ex and Ey and three magnetic channels Hx, Hy, and Hz.

[0042] For example, the time-frequency electromagnetic method transmits high-power electrical pulse square waves through a long conductor, simultaneously acquiring time-domain geoelectric signals. After processing such as deconvolution, time-frequency domain data is obtained, and joint inversion imaging is performed. The time-frequency electromagnetic method requires switching between two electric channels Ex and Ey and two magnetic channels Hx and Hy.

[0043] This application allows for the switching between electrical and magnetic channels based on different exploration methods, which not only adapts to the receiving channel requirements of various exploration methods but also saves on the number of interfaces.

[0044] In some embodiments, the first channel receiving unit 200 further includes a grounding resistance measurement port, which is connected to the third input terminal of the switching switch 230.

[0045] In this embodiment, the first channel receiving unit 200 is also equipped with a grounding resistance measurement port, which can realize the grounding resistance measurement function of the device and monitor the grounding status of the channel in real time. Good grounding is an important condition for ensuring accurate acquisition of electromagnetic signals. By monitoring the grounding resistance in real time, exploration personnel can promptly detect and handle grounding anomalies, avoiding data errors caused by grounding problems.

[0046] refer to Figure 2 As shown, the switching switch 230 also includes switch S3. The grounding resistance measurement port is connected to the first signal processing module 240 through switch S3. When grounding resistance measurement is required, switches S1 and S2 are disconnected and switch S3 is closed.

[0047] In some embodiments, the first signal processing module 240 includes a preamplifier 241, a notch filter 242, a programmable amplifier 243, and an analog-to-digital converter module 244. The output of the switch 230 is connected to the input of the preamplifier 241, the output of the preamplifier 241 is connected to the input of the notch filter 242, the output of the notch filter 242 is connected to the input of the programmable amplifier 243, the output of the programmable amplifier 243 is connected to the input of the analog-to-digital converter module 244, and the output of the analog-to-digital converter module 244 is connected to the acquisition signal feedback terminal of the main controller 100.

[0048] In this embodiment, the acquired signal is amplified by a preamplifier 241, then power frequency interference is suppressed by a notch filter 242, followed by a second-stage amplification by a programmable amplifier 243, and finally the amplified analog acquired signal is converted into a digital signal by an analog-to-digital converter 244 and input to the main controller 100. This improves the reliability and stability of exploration signal acquisition.

[0049] Specifically, in this embodiment, each channel is equipped with a preamplifier 241 and a programmable amplifier 243, which can effectively amplify weak electromagnetic signals and ensure signal integrity during transmission and subsequent processing. Simultaneously, each channel implements a 50Hz notch filter function through a notch filter 242, effectively suppressing power frequency interference. In actual exploration environments, 50Hz power frequency interference is widespread, originating from power lines, electrical equipment, etc., which can severely affect the quality of electromagnetic signal acquisition, leading to data deviations or even unusable data. Through the 50Hz notch filter function, the device can operate stably in complex electromagnetic environments, acquiring cleaner target exploration signals.

[0050] In some embodiments, the first signal processing module 240 further includes a bandwidth switching module 245, which is disposed between the notch filter 242 and the programmable amplifier 243.

[0051] In this embodiment, the bandwidth switching module 245 can achieve adaptive bandwidth adjustment, enabling the device to improve signal acquisition accuracy in different exploration scenarios.

[0052] It should be noted that the bandwidth switching module 245 switches the bandwidth of the first signal processing module 240, enabling each first signal processing module 240 to have multiple bandwidth levels, which can be automatically adjusted according to the receiving frequency range. In actual exploration, different exploration methods and geological targets require the acquisition of electromagnetic signals in different frequency ranges. For example, refer to... Figure 2As shown, in this embodiment, the bandwidth switching module 245 offers three bandwidth options: 30kHz, 1kHz, and 1Hz, corresponding to high, medium, and low bandwidths. For example, in shallow geological structure detection, higher frequency signals are required, so the channel bandwidth is switched to the wider 30kHz setting to acquire richer high-frequency information. In deep mineral exploration, low-frequency signals are more important, so the channel bandwidth is switched to the narrower 1Hz setting to improve the acquisition accuracy of low-frequency signals. The bandwidth switching module 245 enables the bandwidth adjustment function of the first signal processing module 240, allowing the device to optimize signal acquisition performance in different exploration scenarios.

[0053] Specifically, the bandwidth switching module 245 can use an analog switch to select different frequency resistor or capacitor values ​​to achieve bandwidth switching, or use an adjustable filter to achieve bandwidth switching.

[0054] In some embodiments, the electromagnetic exploration receiving device further includes one or more second channel receiving units 250. The second channel receiving unit 250 includes a second electrical channel 251 and a second signal processing module 252. The second electrical channel 251 is connected to the input terminal of the second signal processing module 252, and the output terminal of the second signal processing module 252 is connected to the acquisition signal feedback terminal of the main controller 100.

[0055] In this embodiment, cost can be saved by adding a second channel receiving unit 250 with only electrical channels.

[0056] It should be noted that in the practical application of electromagnetic exploration, the maximum number of electrical channels required is greater than the maximum number of magnetic channels required. If all signal acquisition channels use the switchable first channel receiving unit 200, the relevant interfaces of the magnetic channels and switching switches need to be configured, which is costly. However, this application sets up a second channel receiving unit 250, which omits the magnetic channels and switching switches. By using the form of a first channel receiving unit 200 plus a second channel receiving unit 250, the channel requirements of different exploration methods can be met, and costs can be saved.

[0057] For example, this embodiment employs three first-channel receiving units 200 and three second-channel receiving units 250. It can be configured in a 3-channel electric and 3-channel magnetic field mode, suitable for exploration scenarios requiring simultaneous measurement of electric and magnetic fields, such as when searching for metal veins. Simultaneous analysis of electric and magnetic field information allows for more accurate determination of the ore body's location and size. Alternatively, it can be switched to a 6-channel electric field mode, which, in applications requiring focused attention on electric field signals such as groundwater detection, concentrates resources to improve the accuracy of electric field signal acquisition. This multi-mode compatible design allows the device to adapt to the requirements of various geophysical exploration methods.

[0058] In some embodiments, the electromagnetic exploration receiving device further includes a wireless communication module 260 and / or a GPS module 270, which are connected to the main controller 100.

[0059] In this embodiment, by adding a wireless communication module 260 and / or a GPS module 270, efficiency can be improved and the requirements for high-precision exploration can be met.

[0060] The wireless communication module 260 enables remote transmission of collected data. This module can be either a 4G or 5G module. Utilizing the 4G or 5G mobile public network as the data transmission channel, it facilitates remote status data exchange between the transmitting and receiving ends. The transmitting end can transmit real-time operating status information, such as transmission current magnitude and waveform parameters, to the receiving end; the receiving end can also provide feedback to the transmitting end regarding the collected data and its own operating status, such as battery level and channel operation. Both ends can also transmit control commands to each other, enabling real-time adjustments to the transmission current and received data acquisition parameters, greatly improving operational convenience. For example, during field exploration, explorers can remotely adjust the transmission frequency of the transmitting system through the receiving system based on the site's geological conditions to quickly coordinate working frequencies and effectively improve efficiency.

[0061] The GPS module 270 ensures accurate time synchronization between various channels and systems. Internally, the GPS module 270 can be equipped with a VCTCXO temperature-compensated crystal to further guarantee precise synchronization and acquisition. In geophysical exploration, accurate time synchronization is crucial for accurately measuring parameters such as the phase and time difference of electromagnetic signals. For example, in wide-area electromagnetic exploration, precise time synchronization ensures the comparability of signals acquired from different locations in the time dimension, thereby improving the accuracy of data processing and inversion, and meeting the requirements of high-precision exploration.

[0062] refer to Figure 3 As shown, the second aspect of this application also relates to an electromagnetic exploration receiving host, comprising:

[0063] The laptop computer 300 is equipped with an electromagnetic exploration receiving device as described in the first aspect embodiment.

[0064] In this embodiment, a plurality of first channel receiving units 200 are provided within the laptop 300. Each first channel receiving unit 200 is equipped with a first electrical channel 210 and a magnetic channel 220. The main controller 100 can switch between the first electrical channel 210 and the magnetic channel 220 via a switching switch 230. The first signal processing module 240 converts the received signal and inputs it to the main controller 100 for subsequent analysis and processing. This application can realize the switching between electrical and magnetic channels, adapting to the receiving channel requirements of various exploration methods.

[0065] The data processing capabilities of the Laptop 300 allow for direct analysis of collected exploration signals. Furthermore, the Laptop 300 is portable, making it ideal for field exploration work and offering excellent convenience.

[0066] In some implementations, the laptop 300 is a ruggedized tri-screen laptop.

[0067] In this embodiment, a three-screen ruggedized laptop and an electromagnetic exploration receiver are integrated into one hardware unit, with the electromagnetic exploration receiver hardware built-in to improve portability, stability and convenience.

[0068] It's important to note that the three screens play a crucial role in data display and control. The left screen focuses on displaying real-time time-domain data curves, presenting the changes in electromagnetic signals over time in an intuitive waveform format, helping exploration personnel monitor signal stability and anomalies in real time. The middle screen not only displays amplitude, phase, and other numerical values ​​and curves, allowing exploration personnel to accurately understand the signal's characteristic parameters, but also has the function of controlling the entire receiving system's operation and monitoring status. Exploration personnel can perform various operations on this screen, such as starting or stopping acquisition, adjusting acquisition parameters, and viewing system status. The right screen primarily displays curves or charts such as resistivity, polarizability, and contour maps for various methods, showcasing the distribution of geological parameters from different perspectives and providing intuitive data support for geological analysis and interpretation.

[0069] In some embodiments, the side of the laptop 300 is provided with a junction box interface 310 and a magnetic track interface 320, and also includes an electrical track junction box 400 for connecting to the junction box interface 310.

[0070] In this embodiment, reference is made to Figure 4 As shown, a junction box interface 310 and a magnetic track interface 320 are provided on the side of the laptop 300, and an electrical track junction box 400 is also included. The electrical track adopts an external junction box method. The junction box interface 310 is reserved on the laptop 300, which facilitates transportation and has strong expandability. Each terminal on the junction box corresponds to one electrical track. In application, the electrode potential difference signal is directly connected to the junction box, and then connected to the acquisition channel inside the laptop 300 through the junction box interface 310.

[0071] The third aspect of this application also relates to an electromagnetic exploration system, including an electromagnetic exploration transmitting device and an electromagnetic exploration receiving device, wherein the electromagnetic exploration receiving device is the same as the electromagnetic exploration receiving device described in the first aspect embodiment.

[0072] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An electromagnetic surveying receiving device, characterized in that include: Main controller (100); Multiple first channel receiving units (200) are provided. Each first channel receiving unit (200) includes a first electrical channel (210), a magnetic channel (220), a switching switch (230), and a first signal processing module (240). The first electrical channel (210) is connected to the first input terminal of the switching switch (230), the magnetic channel (220) is connected to the second input terminal of the switching switch (230), the output terminal of the switching switch (230) is connected to the input terminal of the first signal processing module (240), the output terminal of the first signal processing module (240) is connected to the acquisition signal feedback terminal of the main controller (100), and the main controller (100) is connected to the control terminal of the switching switch (230) for switching the first electrical channel (210) and the magnetic channel (220) according to the needs of electromagnetic exploration.

2. The electromagnetic exploration receiving device of claim 1, wherein, The first channel receiving unit (200) further includes a grounding resistance measurement port, which is connected to the third input terminal of the switching switch (230).

3. The electromagnetic exploration receiving device of claim 1, wherein, The first signal processing module (240) includes a preamplifier (241), a notch filter (242), a programmable amplifier (243), and an analog-to-digital converter (244). The output of the switch (230) is connected to the input of the preamplifier (241), the output of the preamplifier (241) is connected to the input of the notch filter (242), the output of the notch filter (242) is connected to the input of the programmable amplifier (243), the output of the programmable amplifier (243) is connected to the input of the analog-to-digital converter (244), and the output of the analog-to-digital converter (244) is connected to the signal acquisition feedback terminal of the main controller (100).

4. The electromagnetic exploration receiving device of claim 3, wherein, The first signal processing module (240) further includes a bandwidth switching module (245), which is disposed between the notch filter (242) and the programmable amplifier (243).

5. The electromagnetic exploration receiving device of claim 1, wherein, The electromagnetic exploration receiving device further includes one or more second channel receiving units (250), each second channel receiving unit (250) including a second electrical channel (251) and a second signal processing module (252). The second electrical channel (251) is connected to the input terminal of the second signal processing module (252), and the output terminal of the second signal processing module (252) is connected to the acquisition signal feedback terminal of the main controller (100).

6. The electromagnetic exploration receiving device according to claim 1, characterized in that, The electromagnetic exploration receiving device further includes a wireless communication module (260) and / or a GPS module (270), which are connected to the main controller (100).

7. An electromagnetic exploration receiver, characterized in that, include: A laptop computer (300) wherein the laptop computer (300) is provided with an electromagnetic exploration receiving device as described in any one of claims 1 to 6.

8. The electromagnetic exploration receiving host according to claim 7, characterized in that, The laptop (300) is a ruggedized tri-proof laptop with three screens.

9. The electromagnetic exploration receiving host according to claim 7, characterized in that, The laptop computer (300) has a splitter interface (310) and a magnetic track interface (320) on its side, and also includes an electrical track splitter (400) for connecting to the splitter interface (310).

10. An electromagnetic exploration system, characterized in that, It includes an electromagnetic exploration transmitting device and an electromagnetic exploration receiving device, wherein the electromagnetic exploration receiving device is the electromagnetic exploration receiving device according to any one of claims 1 to 6.

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