A six-channel electromagnetic signal acquisition instrument

Abstract

The utility model relates to signal acquisition equipment technical field, concretely is a kind of electromagnetic signal acquisition instrument of six channels, including shell, shell inside installation has main control PCB board, six electric field channels are connected on main control PCB board, shell includes lower cover and upper cover, the central control chip on main control PCB board adopts direct conduction heat dissipation mode, the surface of main control PCB board is equipped with heat-conducting silica gel pad, heat-conducting silica gel pad and the contact unit of upper cover inboard directly press fit and cool down. In the electromagnetic signal acquisition instrument of six channels, compared with the traditional simple rubber gasket sealing mode, the sealing structure is more reliable, can effectively prevent the problem of not tight caused by rubber gasket aging, deformation and screw loosening and other factors.In the long-term use process, the sealing property of shell can be maintained for a long time, prevent external moisture, dust and other impurities from invading the inside of acquisition instrument, avoid the problem of circuit short circuit, signal interference and so on caused by moisture corrosion electronic component and dust accumulation.

Description

Technical Field

[0001] This utility model relates to the field of signal acquisition equipment technology, specifically to a six-channel electromagnetic signal acquisition instrument. Background Technology

[0002] Wide-area electromagnetic signal acquisition instruments calculate apparent resistivity by detecting electric or geomagnetic field signals on the Earth's surface and combining this information with the device's power supply and the location of the receiving electrodes. The device transmits current through wires, inducing electromagnetic fields on or beneath the Earth's surface, and then captures these signals through the receiving electrodes. By analyzing these signals and device parameters, the apparent resistivity can be calculated, thus reflecting the influence of the Earth's geological structure on electromagnetic waves.

[0003] Compared to traditional methods such as drilling and tunneling, utilizing the propagation characteristics of electromagnetic waves in geology allows for the rapid and accurate location of underground mineral deposits or structural units. This technology significantly reduces the investment of manpower and resources, increasing exploration efficiency. It reduces unnecessary mining and surveying work, saves financial investment, and minimizes environmental impact, making resource exploration more sustainable and cost-effective. Furthermore, electromagnetic wave methods are non-destructive, requiring no large-scale excavation on the surface or underground, thus protecting the existing ecological environment and avoiding secondary pollution.

[0004] Currently, most mainstream wide-area electromagnetic signal acquisition instruments on the market are single or dual-channel, making it difficult for them to comprehensively capture geomagnetic field changes in complex terrain areas, resulting in insufficient geometric accuracy in data collection. In multi-layered structures and complex environments, these instruments often fail to provide accurate geological information, limiting their adaptability. Existing technologies lack efficient and systematic solutions for multi-band signal acquisition and processing, and signal processing lacks systematicity. Furthermore, in high-noise or heavily polluted environments, traditional acquisition instruments are susceptible to external electromagnetic interference, leading to insufficient data stability and weak anti-interference capabilities.

[0005] Furthermore, existing electromagnetic signal acquisition instruments have numerous shortcomings in terms of sealing. Many instruments have simple housing connection structures, typically using ordinary screws. The seal between the housings often relies on simple rubber gaskets. Over long-term use, this sealing structure is prone to leaks due to factors such as aging and deformation of the rubber gaskets and loosening of the screws, allowing external moisture, dust, and other impurities to easily penetrate the instrument. Once moisture enters, it can corrode the internal electronic components, affecting their performance and lifespan; dust accumulation can lead to short circuits, signal interference, and other problems, reducing the acquisition accuracy and stability of the instrument.

[0006] In certain specialized working environments, such as outdoor areas, humid environments, or areas with strong electromagnetic interference, higher demands are placed on the sealing and anti-interference capabilities of electromagnetic signal acquisition instruments. However, existing acquisition instruments often fall short in these aspects. For example, in outdoor environments, the acquisition instrument may be exposed to rain, mud, and other contaminants; if the sealing is inadequate, the instrument can easily be damaged. In humid environments, moisture can easily penetrate the instrument's interior, affecting its normal operation. In areas with strong electromagnetic interference, due to insufficient shielding performance of the instrument's casing, external electromagnetic interference signals can easily enter the instrument, interfering with the acquisition of electromagnetic signals and causing signal distortion, thus failing to accurately reflect the actual situation. Utility Model Content

[0007] The purpose of this invention is to provide a six-channel electromagnetic signal acquisition device to solve the many shortcomings of existing electromagnetic signal acquisition devices mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides a six-channel electromagnetic signal acquisition instrument, including a housing, with a main control PCB board installed inside the housing. The main control PCB board is connected to six electric field channels. The housing includes a lower cover and an upper cover. The central control chip on the main control PCB board adopts a direct conduction heat dissipation method. A thermally conductive silicone pad is installed on the surface of the main control PCB board. The thermally conductive silicone pad is directly pressed against the contact unit on the inner side of the upper cover for heat dissipation.

[0009] The purpose of this design is twofold: ① Six electric field channels are connected to the PCB board. Compared to previous single-channel and dual-channel designs, the six-channel design significantly improves the geometric accuracy of data collection, enabling comprehensive and effective capture of geomagnetic field changes in complex terrain areas. This significantly improves testing efficiency and reduces labor and field construction costs. All six channels can be used as electrical signal acquisition channels, and three channels can be reused for magnetic signal acquisition. This design makes the electromagnetic signal acquisition instrument highly flexible in field applications, allowing it to complete data acquisition tasks from multiple sensors without needing to carry multiple devices. ② The six-channel design increases the heat generated by the chip. Therefore, this invention adopts a direct conduction heat dissipation method, using a thermally conductive silicone pad directly pressed against the contact unit for rapid heat dissipation. This ensures that the six-channel electromagnetic signal acquisition instrument can operate stably and continuously for extended periods, effectively improving the stability of the equipment.

[0010] Preferably, the main control PCB board is supported by four hexagonal brass studs of the same height and fixed inside the housing with screws.

[0011] The purpose of this setting is as follows: Due to the adoption of a six-channel configuration, the internal wiring of the electromagnetic signal acquisition instrument becomes relatively complex, and the thermal effect will be stronger. By raising the PCB board to the same height using studs, the impact of the thermal effect on the circuit and components can be reduced, and rapid heat dissipation can be assisted. It also enables the equipment to be easily disassembled and maintained, effectively improves the stability of the circuit connection, reduces the complexity of the internal wiring of the instrument, and thus improves the overall reliability of the instrument.

[0012] Preferably, a handle is installed on the top of the housing, the handle is rotatably connected to the lower cover via a pin, and a retaining ring for limiting the position is installed at the end of the pin.

[0013] The purpose of this setting is to limit the handle's position and prevent it from interfering with signal acquisition. When using the device, electrode wires need to be connected to the terminals. This limiting design ensures the handle can only be placed in the non-electrode direction, minimizing accidental interference with multi-channel signal acquisition and guaranteeing its stability.

[0014] Preferably, the lower cover and the upper cover are connected and fixed by standard M4 screws. The upper cover has an O-ring groove on its side, and a waterproof O-ring is installed in the O-ring groove. The lower cover has a protrusion on its side that mates with the O-ring groove. The protrusion presses the waterproof O-ring tightly to achieve a seal between the lower cover and the upper cover.

[0015] The purpose of this design is to create a sealing structure between the upper and lower covers. When the data acquisition device is used in the field, it may face harsh environments such as prolonged exposure to rain and mud. The sealing performance of the device directly determines its stability and reliability. Furthermore, when the operating environment of the data acquisition device is subject to strong electromagnetic interference, if the shielding performance of the outer casing is insufficient, external electromagnetic interference signals can easily enter the device, interfering with the acquisition of electromagnetic signals and causing signal distortion, thus failing to accurately reflect the actual situation. Based on these reasons, this invention incorporates a sealing structure between the upper and lower covers. This sealing structure significantly maintains device stability, extends its service life, and, combined with a heat dissipation structure, increases waterproof performance without affecting stable operation. The sealing structure does not increase internal heat generation; therefore, although it is a simple sealing structure, it delivers excellent performance.

[0016] Preferably, a lithium battery assembly is installed inside the lower cover. The lithium battery assembly is pressed and positioned by a battery pressure plate, and the battery assembly consists of 24 18650 lithium batteries.

[0017] The purpose of this design is to utilize multiple 18650 lithium batteries to significantly improve battery power supply capacity, enabling interconnected and coordinated operation of devices. Traditional devices, lacking effective heat dissipation structures, face significant heat buildup risks when increasing the number of batteries, severely limiting the ability to coordinate multiple devices simultaneously. This invention, however, features a rapid heat dissipation structure and a waterproof design. These unique features allow the data acquisition device to appropriately increase the number of batteries, enhancing its power supply capacity and enabling connection with other devices or systems. This also allows for external control and monitoring, and the provision of pre-existing functional modules for expansion.

[0018] Preferably, one side of the lower cover is equipped with an integrated aviation connector, magnetic track interface, and network port, while the other side is equipped with an electrical signal collection PCB. The top of the upper cover is equipped with several positive terminals, a negative terminal, and a grounding terminal, and is sealed with potting compound.

[0019] In this configuration, the positive and negative terminals are the positive and negative terminals for the electrical interface. These terminals are connected to the main control PCB board via wires, transmitting externally measured electrical signals to the main control PCB board. The magnetic interface is secured to the lower cover with screws, and its internal wiring connects to the main control PCB board. The magnetic channel connector can connect to external magnetic sensors such as magnetic rods, fluxgate magnets, and magnetic coils. The instrument can receive both electrical and magnetic signals, effectively solving the problem of difficult grounding in certain areas. This further improves the environmental adaptability of the multi-channel data acquisition instrument, reduces the time required for position adjustment, equipment debugging, and establishing a stable acquisition channel, and significantly improves the efficiency and stability of multi-channel signal acquisition.

[0020] Application of a six-channel electromagnetic signal acquisition instrument in geological resource exploration. The six-channel electromagnetic signal acquisition instrument of this invention is used in geological resource exploration, mainly for detecting underground mineral deposits, oil and gas resources, and geological structures, and determining resource distribution by analyzing the reflection and conduction characteristics of electromagnetic waves.

[0021] In summary, compared with the prior art, the present invention has the following beneficial effects: 1. Six electric field channels are connected to the PCB board. Compared with the previous single-channel and dual-channel designs, the six-channel design significantly improves the geometric accuracy of data collection, enabling comprehensive and effective capture of geomagnetic field changes in complex terrain areas. This significantly improves testing efficiency and reduces labor and field construction costs. All six channels can be used as electrical signal acquisition channels, and three channels can be reused for magnetic signal acquisition. This design makes the electromagnetic signal acquisition instrument highly flexible in field applications, allowing it to complete data acquisition tasks from multiple sensors without needing to carry multiple devices.

[0022] 2. The six-channel design increases the heat generated by the chip. Therefore, this invention adopts a direct conduction heat dissipation method, using a thermally conductive silicone pad directly pressed against the contact unit for rapid heat dissipation. This ensures that the six-channel electromagnetic signal acquisition instrument can operate stably and continuously for extended periods, effectively improving the stability of the device. This heat dissipation design can quickly conduct the heat generated by the central control chip to the top cover, where it exchanges heat with the external environment, effectively reducing the operating temperature of the central control chip, ensuring stable chip operation, and avoiding performance degradation, malfunctions, or even damage caused by chip overheating. This improves the overall performance and reliability of the acquisition instrument.

[0023] 3. Due to the adoption of a six-channel configuration, the internal wiring of the electromagnetic signal acquisition instrument becomes relatively complex, leading to increased thermal effects. However, by using studs to elevate the PCB board, the impact of thermal effects on the circuitry and components is reduced, aiding in rapid heat dissipation. This also facilitates easy disassembly and maintenance, effectively improving circuit connection stability and reducing the complexity of internal wiring, thereby enhancing the overall reliability of the instrument. In this six-channel electromagnetic signal acquisition instrument, standard M4 screws are used to connect and fix the lower and upper covers. An O-ring groove is provided on the side of the upper cover, and a waterproof O-ring is installed in the groove. The protrusion on the side of the lower cover cooperates with the O-ring groove to press the O-ring tightly. This sealing structure is more reliable than the traditional simple rubber gasket sealing method, effectively preventing sealing problems caused by rubber gasket aging, deformation, and loose screws. During long-term use, the sealing structure maintains its airtightness, preventing external moisture, dust, and other impurities from entering the data logger. This avoids problems such as short circuits and signal interference caused by moisture corrosion of electronic components and dust accumulation, thus significantly improving the data acquisition accuracy and stability, and extending the data logger's lifespan. In harsh environments such as the field and in humid conditions, this sealing structure effectively resists the intrusion of rainwater, mud, and moisture, ensuring stable and reliable operation of the data logger in complex environments and reducing the risk of equipment damage caused by environmental factors. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the top structure of this utility model; Figure 3 This is a schematic diagram of one side of the structure of this utility model; Figure 4 This is a schematic diagram of the other side of the structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of the present invention; The meanings of the labels in the diagram are as follows: 1. Hexagon socket copper stud; 2. Lithium battery assembly; 3. Bottom cover; 4. Battery pressure plate; 5. Standard M4 screw; 6. Main control PCB board; 7. Top cover; 71. Thermal conductive silicone pad; 8. Waterproof O-ring; 9. Positive terminal; 10. Negative terminal; 11. Instrument start switch; 12. Communication signal indicator; 13. Working signal indicator; 14. GPS signal indicator; 15. GPS antenna external interface; 16. WiFi-4G dual-mode antenna; 17. Handle; 18. Pin; 19. Snap ring; 20. Grounding terminal; 21. Integrated aviation connector; 22. Magnetic track interface; 23. Network port; 24. Electrical signal collection PCB. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a six-channel electromagnetic signal acquisition instrument, such as... Figures 1-5 As shown, the device includes an outer casing, inside which a main control PCB board 6 is installed. The main control PCB board 6 is connected to six electric field channels. The outer casing includes a lower cover 3 and an upper cover 7. The central control chip on the main control PCB board 6 adopts a direct conduction heat dissipation method. A thermally conductive silicone pad 71 is installed on the surface of the main control PCB board 6. The thermally conductive silicone pad 71 is directly pressed with the contact unit on the inner side of the upper cover 7 for heat dissipation.

[0027] In this embodiment, the main control PCB board 6 is supported by four hexagonal brass studs 1 of the same height and fixed inside the housing with screws. This support and fixing method ensures that the main control PCB board 6 is stably installed inside the data acquisition instrument, avoiding displacement or loosening of the PCB board due to factors such as equipment movement and vibration. It also ensures a stable connection between the main control PCB board 6 and the housing and other internal components, enabling the circuits such as the six electric field channels to work normally and reliably, thereby improving the overall stability and reliability of the data acquisition instrument.

[0028] Specifically, a handle 17 is installed on the top of the outer casing. The handle 17 is rotatably connected to the lower cover 3 via a pin 18, and a retaining ring 19 for limiting the position is installed at the end of the pin 18. The design of the handle 17 facilitates the user's carrying and movement of the data acquisition device. The rotatable connection allows the handle 17 to be adjusted in angle according to actual usage needs, improving the flexibility of use. The cooperation between the pin 18 and the retaining ring 19 ensures the firmness of the connection between the handle 17 and the lower cover 3, preventing the handle 17 from falling off during use and ensuring safety during carrying and movement.

[0029] The lower cover 3 and the upper cover 7 are connected and fixed together by standard M4 screws 5. The upper cover 7 has an O-ring groove on its side, within which a waterproof O-ring 8 is installed. The lower cover 3 has a protrusion on its side that mates with the O-ring groove, pressing the waterproof O-ring 8 firmly to achieve a seal between the lower cover 3 and the upper cover 7. The connection and fixation of the lower cover 3 and upper cover 7 with standard M4 screws 5 ensures the integrity and stability of the outer casing structure. The cooperation between the waterproof O-ring 8, the O-ring groove, and the protrusion forms a reliable sealing structure, effectively preventing external moisture, dust, and other impurities from entering the data acquisition instrument. This avoids problems such as moisture corrosion of electronic components and short circuits caused by dust accumulation, improving the waterproof and dustproof performance of the data acquisition instrument, extending its service life, and ensuring stable operation in various environments.

[0030] The lower cover 3 houses the lithium battery assembly 2, which is secured and positioned by the battery clamping plate 4. The clamping and positioning of the lithium battery assembly 2 by the battery clamping plate 4 ensures its firm installation inside the lower cover 3, preventing displacement when the equipment moves or is subjected to external impact. This also guarantees a stable connection between the lithium battery assembly 2 and components such as the main control PCB board 6, providing a reliable power supply for the data acquisition instrument. Furthermore, it facilitates heat dissipation for the lithium battery assembly 2, improving battery life and safety.

[0031] One side of the lower cover 3 houses a comprehensive aviation connector 21, a magnetic track interface 22, and a network port 23, while the other side houses an electrical signal aggregation PCB 24. This well-organized layout of the integrated aviation connector 21, magnetic track interface 22, network port 23, and electrical signal aggregation PCB 24 facilitates easy connection and communication between the data acquisition unit and other devices. The integrated aviation connector 21 can meet the input and output requirements of various signal types; the magnetic track interface 22 can be used to connect devices such as magnetic track sensors; the network port 23 facilitates data transmission between the data acquisition unit and the network; and the electrical signal aggregation PCB 24 aggregates and processes multiple electrical signals, improving the data acquisition unit's functional expandability and compatibility, and allowing users to easily connect devices and acquire data according to their actual needs.

[0032] The top of the cover 7 is equipped with several positive terminals 9, negative terminals 10, and a grounding terminal 20, all sealed with potting compound. The positive terminals 9, negative terminals 10, and grounding terminal 20 provide interfaces for external power input and signal output, facilitating connection to external power sources and signal acquisition equipment. The potting compound effectively prevents moisture, dust, and other impurities from entering the terminals, avoiding signal interference or equipment malfunctions due to poor contact, thus improving the reliability and stability of the terminals and ensuring the normal operation of the data acquisition instrument.

[0033] The top of the cover 7 also houses an instrument start switch 11, a communication signal indicator 12, a working signal indicator 13, a GPS signal indicator 14, a GPS antenna external interface 15, and a WiFi-4G dual-mode antenna 16. The instrument start switch 11 allows users to easily control the data acquisition device's on / off state; the communication signal indicator 12, working signal indicator 13, and GPS signal indicator 14 clearly display the data acquisition device's communication status, working status, and GPS signal reception, enabling users to promptly understand the device's operating status; the GPS antenna external interface 15 facilitates connection to an external GPS antenna, improving the stability and accuracy of GPS signal reception; and the WiFi-4G dual-mode antenna 16 provides the data acquisition device with wireless communication capabilities, facilitating remote data transmission and device control, thus enhancing the data acquisition device's intelligence and convenience.

[0034] Finally, it should be noted that the electronic components in the instrument start switch 11, communication signal indicator light 12, etc. in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A six-channel electromagnetic signal acquisition instrument, comprising a housing, characterized in that, The main control PCB board (6) is installed inside the outer shell. The main control PCB board (6) is connected to six electric field channels. The outer shell includes a lower cover (3) and an upper cover (7). The central control chip on the main control PCB board (6) adopts a direct conduction heat dissipation method. A thermal conductive silicone pad (71) is installed on the surface of the main control PCB board (6). The thermal conductive silicone pad (71) is directly pressed with the contact unit inside the upper cover (7) for heat dissipation.

2. The six-channel electromagnetic signal acquisition instrument according to claim 1, characterized in that, The main control PCB board (6) is supported by four internal hexagonal copper studs (1) of the same height and fixed inside the housing with screws.

3. The six-channel electromagnetic signal acquisition instrument according to claim 1, characterized in that, A handle (17) is installed on the top of the outer casing. The handle (17) is rotatably connected to the lower cover (3) via a pin (18). A retaining ring (19) for limiting the position is installed at the end of the pin (18).

4. The six-channel electromagnetic signal acquisition instrument according to claim 1, characterized in that, The lower cover (3) and the upper cover (7) are connected and fixed by a standard M4 screw (5). The upper cover (7) has an O-ring groove on its side, and a waterproof O-ring (8) is installed in the O-ring groove. The lower cover (3) has a protrusion that mates with the O-ring groove on its side. The protrusion presses the waterproof O-ring (8) together to achieve a seal between the lower cover (3) and the upper cover (7).

5. The six-channel electromagnetic signal acquisition instrument according to claim 1, characterized in that, The lower cover (3) is equipped with a lithium battery assembly (2), which is pressed and positioned by a battery pressure plate (4). The battery assembly (2) consists of 24 18650 lithium batteries.

6. The six-channel electromagnetic signal acquisition instrument according to claim 1, characterized in that, The lower cover (3) has an integrated aviation plug (21), a magnetic track interface (22), and a network port (23) installed on one side of its outer wall, and an electrical signal collection PCB (24) installed on the other side of its outer wall. The top of the upper cover (7) has several positive terminals (9), negative terminals (10), and a grounding terminal (20) installed on its top, and is sealed with potting compound.

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