Intrinsic safety type handheld terminal for data acquisition of borehole radar

Abstract

The utility model discloses an intrinsic safety type handheld terminal for borehole radar data acquisition. The intrinsic safety type handheld terminal comprises a main shell, a front cover, a two-core aviation plug, a four-core aviation plug, a power switch, a hand guard, a standby switch, a return switch and a screenshot switch, the lithium iron phosphate lithium ion battery pack, the intrinsic safety power panel and the battery electric quantity acquisition circuit board are arranged on the main shell, and the display screen pressing plate, the display screen, the Android mainboard radiator, the Android mainboard and the switching signal conversion board are arranged on the front cover. The device can be used under multiple working conditions of the ground, the underground coal mine and the petrochemical engineering field, and parameter configuration, measurement data acquisition, measurement data display and storage of the drilling radar are realized; real-time transmission of radar data can be realized based on an Ethernet port transmission mode, and radar data synchronization can also be realized based on a wireless WiFi transmission mode; the device has the remarkable advantages of small size, light weight, portability, low cost and multi-channel data transmission, and meets the national related standard requirements of mining products.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine safety technology, and relates to technical fields such as coal mine geological exploration, geological anomaly detection, and coal mine safety. Specifically, it relates to an intrinsically safe handheld terminal for borehole radar data acquisition. Background Technology

[0002] Ground-penetrating radar (GPR) is an effective means of detecting underground targets. It is a non-destructive testing technology with high detection speed and convenient, flexible operation, and is applied in many engineering surveying fields. GPR mainly consists of a control unit, transmitter, transmitting antenna, receiver, and receiving antenna. The control unit is the data acquisition system, used to send a series of control commands to the transmitter and receiver. The transmitter transmits electromagnetic waves underground according to the commands, and the receiver acquires data accordingly. The transmitting and receiving antennas are used to transmit and receive electromagnetic waves. After sampling and signal conversion, the received reflected signals are converted into digital signals and displayed and stored on the control unit.

[0003] Ground penetrating radar is mainly used for detecting ground cavities or road pipelines. It is typically pushed by a four-wheeled vehicle. The main unit, the transmitting part (transmitter and transmitting antenna), and the receiving part (receiver and receiving antenna) need to be installed on the same detection vehicle. That is, within a certain short range, radar data is generally transmitted via wired transmission, making it difficult to achieve long-distance transmission of radar data. In addition, the main unit is relatively large and inconvenient to carry. It is powered by conventional lithium-ion batteries, so it cannot be directly used in underground coal mines. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an intrinsically safe handheld terminal for borehole radar data acquisition. This terminal can be used in various working conditions, including on the ground, underground in coal mines, and in the petrochemical industry. It enables the configuration of borehole radar parameters, acquisition of measurement data, and display and storage of measurement data. The borehole radar supports two construction processes: in the manual pushing mode, real-time radar data transmission is achieved via Ethernet, while offline measurement using wireless WiFi is also possible; in the drilling rig pushing mode, offline measurement using wireless WiFi is also possible. This intrinsically safe handheld terminal offers significant advantages such as small size, light weight, portability, low cost, and multi-channel data transmission, and meets relevant national standards for mining products.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An intrinsically safe handheld terminal for borehole radar data acquisition includes a main housing, a front cover, a two-core aviation connector, a four-core aviation connector, a power switch, a hand guard, a standby switch, a return switch, and a screenshot switch; it also includes a lithium iron phosphate battery pack, an intrinsically safe power board, and a battery power acquisition circuit board disposed in the main housing, as well as a display screen pressure plate, a display screen, an Android motherboard heat sink, an Android motherboard, and a switch signal conversion board disposed in the front cover;

[0007] The main housing, front cover, and handguard are assembled into a safe handheld terminal housing; wherein, the main housing and the front cover are opposite each other and cover each other to form the main body of the housing, and the handguards are located on both sides of the main body of the housing;

[0008] The power switch, two-core connector, and four-core connector are mounted on the main housing; the power switch is electrically connected to the switching circuit in the intrinsically safe power board; the two-core connector serves as a charging port and is electrically connected to the lithium iron phosphate battery pack; and the four-core connector serves as an Ethernet port and is electrically connected to the Android motherboard.

[0009] This utility model also includes the following technical features:

[0010] Specifically, the front cover has multiple threaded fixing holes inside to fix the display screen pressure plate, display screen, Android motherboard heat sink, Android motherboard and switch signal conversion board; the front cover also has three through holes for installing standby switch, back switch and screenshot switch;

[0011] The display screen is placed in the front cover display screen mounting area and its inner surface is fixed by a display screen pressure plate. The display screen's display interface faces outward and its data lead-out lines face inward towards the front cover.

[0012] The Android motherboard is fixed to the inner surface of the display screen pressure plate;

[0013] The Android motherboard heatsink is mounted on the Android motherboard.

[0014] The switch signal conversion board is installed on the inner surface of the front cover and close to the side of the three switches.

[0015] Specifically, the standby switch, return switch, and screenshot switch are electrically connected to the switch signal conversion board;

[0016] The display screen and the switch signal conversion board are both electrically connected to the Android motherboard.

[0017] Specifically, the Android motherboard is an Android system motherboard with wireless WiFi communication function and Ethernet communication function; the Android motherboard integrates a USB module, a wireless WiFi module, an Ethernet module, and a main control chip.

[0018] Specifically, the display screen is a JDI assembled screen, 7 inches in size, with a resolution of 1920*1200, and is a high-definition full-view touch screen.

[0019] Specifically, the main housing includes a lithium iron phosphate battery pack cavity, an intrinsically safe power supply cavity, and a battery power acquisition unit mounting area; the lithium iron phosphate battery pack is placed inside the lithium iron phosphate battery pack cavity; the intrinsically safe power supply board and its heat sink are placed inside the intrinsically safe power supply cavity; and the battery power acquisition circuit board is fixed to the battery power acquisition unit mounting area by four screws.

[0020] The lithium iron phosphate battery pack is electrically connected to the intrinsically safe power board; the intrinsically safe power board is electrically connected to the battery power acquisition circuit board and the Android motherboard.

[0021] Specifically, the output of the lithium iron phosphate battery pack is connected to the intrinsically safe power supply board, and after passing through two stages of current limiting and voltage regulation circuits on the intrinsically safe power supply board, it is connected to the Android motherboard to achieve intrinsically safe power supply; the output of the lithium iron phosphate battery pack is also connected to the battery power acquisition circuit board, and the output of the battery power acquisition circuit board is connected to the Android motherboard.

[0022] Specifically, the lithium iron phosphate battery pack uses a single IFR18650 lithium iron phosphate battery.

[0023] The intrinsically safe power board can convert non-safe inputs into intrinsically safe outputs, and consists of two-stage voltage and current limiting circuit chips and their peripheral resistors and capacitors.

[0024] The battery power acquisition circuit board can acquire real-time voltage and remaining capacity information of the lithium iron phosphate lithium-ion battery pack and feed it back to the Android motherboard for real-time display.

[0025] Specifically, the two-core connector, four-core connector, power switch, standby switch, return switch, and screenshot switch are installed on the intrinsically safe handheld terminal housing and are all electrically connected to the Android motherboard.

[0026] Specifically, the four-core aviation plug Ethernet port can realize real-time transmission of radar data; it can also realize radar data synchronization based on wireless WiFi transmission.

[0027] Compared with the prior art, this utility model has the following technical effects:

[0028] This utility model relates to an intrinsically safe handheld terminal for borehole radar data acquisition, which can be used in various working conditions, including on the ground, underground in coal mines, and in the petrochemical industry. Using this intrinsically safe handheld terminal, borehole radar parameters can be configured, measurement data can be acquired, and measurement data can be displayed and stored. The borehole radar operates in two construction processes: in the manual push mode, real-time radar data transmission is achieved via Ethernet, or offline measurement using wireless WiFi transmission for data storage; in the drilling rig push mode, offline measurement using wireless WiFi transmission for data storage is achieved. It has significant advantages such as small size, light weight, portability, low cost, and multi-channel data transmission, and meets the relevant national standards for mining products. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall casing of the intrinsically safe handheld terminal for borehole radar data acquisition according to this utility model.

[0030] Figure 2 This is a schematic diagram of the main casing of the intrinsically safe handheld terminal for borehole radar data acquisition according to this utility model.

[0031] Figure 3 This is a schematic diagram of the front cover of the intrinsically safe handheld terminal for borehole radar data acquisition according to this utility model.

[0032] Figure 4 This is a schematic diagram illustrating the structural principle of the intrinsically safe handheld terminal for borehole radar data acquisition according to this utility model.

[0033] The meanings of the labels in the diagram are as follows:

[0034] 1. Main casing; 11. Lithium iron phosphate battery pack; 12. Intrinsically safe power board; 13. Battery power acquisition circuit board; 2. Front cover; 21. Display screen pressure plate; 22. Display screen; 23. Android motherboard heat sink; 24. Android motherboard; 25. Switch signal conversion board; 3. Two-core aviation connector; 4. Four-core aviation connector; 5. Power switch; 6. Hand guard; 7. Standby switch; 8. Back switch; 9. Screenshot switch. Detailed Implementation

[0035] This invention provides an intrinsically safe handheld terminal for borehole radar data acquisition. Borehole radar, as a new technology, offers advantages such as continuous, non-destructive, high-efficiency, and high-precision operation. The borehole radar includes a handheld terminal, a main control unit, a transmitting unit, a transmitting antenna, a receiving unit, a receiving antenna, and a power supply unit. Based on the propagation characteristics of electromagnetic waves in lossy media, the borehole radar transmits high-frequency electromagnetic waves into the medium in the form of broadband short pulses. When it encounters an inhomogeneous body (interface), it reflects part of the electromagnetic waves. The reflection coefficient is determined by the relative permittivity of the medium. By processing the received reflected signals and interpreting the images, the radar can identify concealed targets.

[0036] The working principle and system composition of borehole radar are basically the same as those of ground-penetrating radar. However, due to significant differences in application scenarios, the two differ in instrument structure, functional circuit layout, and power supply. Borehole radar is generally used in the confined space of underground coal mines, using either a manual push rod or a metal drill rod. Therefore, the borehole radar system is divided into an in-hole section and an out-of-hole section. The in-hole section mainly includes the main control unit, transmitting unit, transmitting antenna, receiving unit, receiving antenna, and power supply unit. The out-of-hole section mainly consists of an intrinsically safe handheld terminal and intelligent data acquisition APP software. Because of the explosive hazards of gas and coal dust in underground coal mines, the intrinsically safe handheld terminal of the borehole radar must be powered by a special lithium-ion battery with relevant certifications. To ensure a long working time, a low-power circuit design is adopted. To adapt to wired transmission and wireless synchronous offline working modes, it has multi-channel data transmission methods, and is small in size and lightweight, making it easy to carry.

[0037] This intrinsically safe handheld terminal uses an Android motherboard as its control core, featuring low power consumption and small size. It employs a lithium iron phosphate battery pack with provincial / ministerial level third-party certification, coupled with an intrinsically safe power supply unit, ensuring safety and reliability and meeting relevant national standards for mining products. Made of ABS engineering plastic and 3D printed, it boasts low processing costs, light weight, and portability. It features multi-channel data transmission methods including wireless WiFi and Ethernet ports, catering to various conveying processes. It can be used in various conditions on the ground, underground in coal mines, and in the petrochemical industry, offering significant advantages such as small size, light weight, portability, low processing costs, and multi-channel data transmission, while also meeting relevant national standards for mining products.

[0038] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0039] Example 1:

[0040] like Figures 1 to 4As shown, this embodiment provides an intrinsically safe handheld terminal for borehole radar data acquisition, including a main housing 1, a front cover 2, a two-pin aviation connector 3 as a charging port, a four-pin aviation connector 4 as an Ethernet port, a power switch 5, a hand guard 6, a standby switch 7, a back switch 8, and a screenshot switch 9; it also includes a lithium iron phosphate battery pack 11, an intrinsically safe power board 12, and a battery power acquisition circuit board 13 disposed on the main housing 1, and a display screen pressure plate 21, a display screen 22, an Android motherboard heat sink 23, and an Android motherboard 24 disposed on the front cover 2. A switch signal conversion board 25; the main housing 1, front cover 2, and handguard 6 are assembled into an intrinsically safe handheld terminal housing; wherein, the main housing 1 and the front cover 2 are opposite to each other and closed to form the main body of the housing, and the handguard 6 is located on both sides of the main body of the housing; the power switch 5, the two-core aviation connector 3, and the four-core aviation connector 4 are installed and fixed on the main housing; the power switch 5 is electrically connected to the switch circuit in the intrinsically safe power board 12; the two-core aviation connector 3 serves as a charging port and is electrically connected to the lithium iron phosphate lithium-ion battery pack 11; the four-core aviation connector 4 serves as an Ethernet port and is electrically connected to the Android motherboard 24;

[0041] More specifically, the main body of the casing is made of ABS plastic and consists of a handguard, front cover, main casing, display screen pressure plate, heat sink, main PCB heat sink, etc.; the handguard is made of rubber and is integrally cast using a mold, which plays a supporting and protective role, preventing the intrinsically safe handheld terminal from falling and damaging the casing. The two ends of the handguard are U-shaped and have two end windows, and it becomes an integral part of the casing during assembly.

[0042] The front cover 2 is part of the outer shell, and has multiple threaded fixing holes inside for fixing the display plate 21, display 22, Android motherboard heat sink 23, Android motherboard 24, and switch signal conversion board 25. Specifically, the display 22 is placed in the display installation area of ​​the front cover 2, which is a hollow area, and its inner surface is fixed by the display plate 21. The display interface of the display 22 faces outward, and its data lead-out line faces inward to the front cover 2. The Android motherboard 24 is fixedly installed on the back (top) of the display plate 21, i.e., the inner surface. Specifically, the Android motherboard 24 is fixed to the display plate 21 with four screws. The Android motherboard heat sink 23 is installed and fixed on the Android motherboard 24. Before installation, thermal grease is applied to the contact surface between the Android motherboard heat sink 23 and the motherboard chip of the Android motherboard 24. The switch signal conversion board 25 is fixedly installed on the inner surface of the front cover 2 and close to the three reset switches. The front cover 2 also has three φ12mm through holes for installing three reset switches, namely the standby switch 7, the back switch 8, and the screenshot switch 9.

[0043] The reset switch (i.e., standby switch 7), return switch 8, and screenshot switch 9 are electrically connected to the switch signal conversion board 25; the display screen 22 and the switch signal conversion board 25 are both electrically connected to the Android motherboard 24, which is an Android system motherboard with wireless WiFi communication function and Ethernet communication function; the Android motherboard 24 integrates and installs a USB module, a wireless WiFi module, an Ethernet module, a main control chip, and its peripheral functions.

[0044] More specifically, display 22 is a JDI assembled screen, 7 inches in size, with a resolution of 1920*1200, and is a high-definition full-view touch screen.

[0045] The installation and assembly process is as follows: First, place the display screen on the front cover in the correct installation position, with the display interface facing outwards and the data lead-out lines facing inwards. Then, use the display screen pressure plate to press and fix the display screen. The Android motherboard is fixed to the display screen pressure plate with four screws. To ensure effective heat dissipation of the Android motherboard, install an Android motherboard heatsink. Before installing the Android motherboard heatsink, apply thermal grease to the main control chip location. The switch signal conversion board is installed and fixed inside the front cover near the three reset switches. The function of this switch signal conversion board is to convert the conventional electrical interfaces of the three reset switches into interfaces that can connect to the 6-pin FPC connector of the Android motherboard. The front cover and the back cover are combined and fixed with four screws to form a complete shell.

[0046] The main housing 1 is part of the outer shell, and contains a lithium iron phosphate battery pack cavity, an intrinsically safe power supply cavity, and a battery power acquisition unit mounting area. The lithium iron phosphate battery pack 11 is placed in the lithium iron phosphate battery pack cavity and will be sealed with RTV-133 room temperature vulcanized methyl silicone rubber later. The intrinsically safe power supply PCB board, i.e., the intrinsically safe power board 12 and its heat sink, is placed in the intrinsically safe power supply cavity and will be sealed with RTV-133 room temperature vulcanized methyl silicone rubber later. The battery power acquisition unit PCB board, i.e., the battery power acquisition circuit board 13, is fixed to the battery power acquisition unit mounting area by four screws. The lithium iron phosphate battery pack 11 is electrically connected to the intrinsically safe power board 12. The intrinsically safe power board 12 is electrically connected to the battery power acquisition circuit board 13 and the Android motherboard 24.

[0047] Specifically, the output of the lithium iron phosphate lithium-ion battery pack 11 is connected to the intrinsically safe power board 12, and after passing through the two-stage current limiting and voltage regulating circuit on the intrinsically safe power board 12, it is connected to the Android motherboard 24 to achieve intrinsically safe power supply; the output of the lithium iron phosphate lithium-ion battery pack 11 is also connected to the battery power acquisition circuit board 13, and the output of the battery power acquisition circuit board 13 is connected to the Android motherboard 24.

[0048] Specifically, the lithium iron phosphate lithium-ion battery pack 11 is composed of cells certified by provincial and ministerial-level third-party testing institutions, and the intrinsically safe handheld terminal uses a single IFR18650 lithium iron phosphate battery.

[0049] Specifically, the intrinsically safe power supply unit, also known as the intrinsically safe power board 12 or intrinsically safe power circuit, can convert non-safe inputs into intrinsically safe outputs. The intrinsically safe handheld terminal is an external device and belongs to the IB protection level. The intrinsically safe power supply unit consists of two-stage voltage and current limiting circuit chips and their peripheral resistors and capacitors.

[0050] Specifically, the battery power acquisition unit, i.e., the battery power acquisition circuit board 13, is developed based on the STM32F1 series microcontroller. Its main function is to acquire real-time voltage and remaining capacity information of the lithium iron phosphate lithium-ion battery pack 11 and feed it back to the Android motherboard 24 for real-time display. More specifically, the battery power acquisition unit uses I... 2 The C circuit acquires battery power information and converts it into USB format data via a conversion circuit controlled by an STM32F1 series microcontroller. This data is then uploaded to the USB port of the Android motherboard for system access and display.

[0051] The intelligent data acquisition APP software is developed based on the Android system and runs on an intrinsically safe handheld terminal. It has functions such as sending drilling radar operating parameters, real-time data acquisition and display, data integrity analysis, data storage, and instrument status monitoring.

[0052] Two-core connector 3, four-core connector 4, power switch 5, standby switch 7, return switch 8, and screenshot switch 9 are installed on the intrinsically safe handheld terminal housing and are all electrically connected to the Android motherboard 24.

[0053] Specifically, the switching unit is a switching circuit based on conventional transistors, MOSFETs, and their peripheral circuits. It works in conjunction with a power switch with a self-locking function to control the power-on or power-off of the intrinsically safe handheld terminal. The reset switches are implemented using conventional switches with a reset function; there are three switches in total, each implementing one of the three functions: confirm, return, and screenshot. Figure 1 As shown, switch 1 is the confirmation button, switch 2 is the return button, and switch 3 is the screenshot button. The screenshot button can capture the screen display information in real time and save the information that the user cares about at the moment for easy analysis later. The power switch, two-pin connector, and four-pin connector are all conventional components.

[0054] When using the device, first turn on the main power switch. The intrinsically safe power board will power on, and after current limiting and voltage regulation, the power supply will be sent to the Android motherboard. After the Android motherboard powers on and starts up, the boot process will be displayed on the screen. To save power in standby mode, simply press and hold the standby switch for 3 seconds. To restart, press and hold the standby switch again for 3 seconds. Network data is connected via a four-pin connector. To return to the previous screen, use the return switch; to take a screenshot of the current screen, simply click the screenshot switch.

[0055] During underground coal mine operations, technicians select either wired Ethernet transmission or wireless WiFi connection based on the data transmission type chosen for this borehole radar measurement. When wired Ethernet transmission is selected, the four-core connector of the borehole radar transmission cable is connected to the four-core connector of the intrinsically safe handheld terminal. The device is powered on, instrument operating parameters are set, and data acquisition begins. The borehole radar data is transmitted back to the intrinsically safe handheld terminal in real time for display and storage. When wireless WiFi mode is selected, the borehole radar probe is activated, and the intrinsically safe handheld terminal establishes a connection with the probe's WiFi hotspot. The device is powered on, instrument operating parameters are set, and the borehole radar begins autonomous measurement. After completing the current borehole data detection, the borehole radar is pulled out of the borehole, and the intrinsically safe handheld terminal reconnects to the probe's WiFi hotspot, transmitting the borehole radar data back to the intrinsically safe handheld terminal for display and storage. A sealing ring is present at the connection between the main casing and the front cover to ensure the intrinsically safe handheld terminal's water-proof performance.

[0056] This utility model relates to an intrinsically safe handheld terminal for borehole radar data acquisition, which can be used in various working conditions in the fields of surface, underground coal mines, and petrochemicals. Using this intrinsically safe handheld terminal, borehole radar parameters can be configured, measurement data can be acquired, and measurement data can be displayed and stored. In manual push mode, real-time radar data transmission is achieved via Ethernet port, and synchronous offline measurement of radar data can also be achieved via wireless WiFi transmission. In drilling rig push mode, synchronous offline measurement of radar data is achieved via wireless WiFi transmission. The intrinsically safe handheld terminal for borehole radar data acquisition has significant advantages such as small size, light weight, portability, low cost, and multi-channel data transmission, and meets the relevant national standards for mining products.

[0057] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0058] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0059] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. An intrinsically safe handheld terminal for borehole radar data acquisition, characterized in that, It includes a main housing (1), a front cover (2), a two-core aviation connector (3), a four-core aviation connector (4), a power switch (5), a hand guard (6), a standby switch (7), a return switch (8), and a screenshot switch (9); it also includes a lithium iron phosphate lithium-ion battery pack (11), an intrinsically safe power board (12), and a battery power acquisition circuit board (13) located on the main housing (1), and a display screen pressure plate (21), a display screen (22), an Android motherboard heat sink (23), an Android motherboard (24), and a switch signal conversion board (25) located on the front cover (2); The main housing (1), front cover (2) and handguard (6) are assembled into a safe handheld terminal housing; wherein, the main housing (1) and the front cover (2) are opposite to each other and cover each other to form the main body of the housing, and the handguard (6) is located on both sides of the main body of the housing; The power switch (5), two-core connector (3), and four-core connector (4) are installed on the main housing (1); the power switch (5) is electrically connected to the switching circuit in the intrinsically safe power board (12); the two-core connector (3) is electrically connected to the lithium iron phosphate battery pack (11) as a charging port; and the four-core connector (4) is electrically connected to the Android motherboard (24) as an Ethernet port.

2. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The front cover (2) has multiple threaded fixing holes inside to fix the display screen pressure plate (21), display screen (22), Android motherboard heat sink (23), Android motherboard (24) and switch signal conversion board (25); the front cover (2) also has three through holes for installing standby switch (7), return switch (8) and screenshot switch (9); The display screen (22) is placed in the display screen installation area of ​​the front cover (2) and its inner surface is fixed by the display screen pressure plate (21). The display interface of the display screen (22) faces outward and its data lead-out line is inside the front cover (2). The Android motherboard (24) is fixed to the inner surface of the display screen pressure plate (21); The Android motherboard heat sink (23) is mounted on the Android motherboard (24); The switch signal conversion board (25) is installed on the inner surface of the front cover (2) and close to the side of the three switches.

3. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The standby switch (7), return switch (8), and screenshot switch (9) are electrically connected to the switch signal conversion board (25); The display screen (22) and the switch signal conversion board (25) are both electrically connected to the Android motherboard (24).

4. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The Android motherboard (24) is an Android system motherboard with wireless WiFi communication function and Ethernet communication function; the Android motherboard (24) integrates a USB module, a wireless WiFi module, an Ethernet module and a main control chip.

5. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The display screen (22) is a JDI assembled screen, 7 inches in size, with a resolution of 1920*1200, and is a high-definition full-view touch screen.

6. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The main housing (1) is provided with a lithium iron phosphate battery pack cavity, an intrinsically safe power supply cavity, and a battery power acquisition unit installation area; the lithium iron phosphate battery pack (11) is placed in the lithium iron phosphate battery pack cavity; the intrinsically safe power supply board (12) and its heat sink are placed in the intrinsically safe power supply cavity; the battery power acquisition circuit board (13) is fixed to the battery power acquisition unit installation area by four screws; The lithium iron phosphate lithium-ion battery pack (11) is electrically connected to the intrinsically safe power board (12); the intrinsically safe power board (12) is electrically connected to the battery power acquisition circuit board (13) and the Android motherboard (24).

7. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The output of the lithium iron phosphate lithium-ion battery pack (11) is connected to the intrinsically safe power board (12), and after passing through the two-stage current limiting and voltage regulating circuit on the intrinsically safe power board (12), it is connected to the Android motherboard (24) to achieve intrinsically safe power supply; the output of the lithium iron phosphate lithium-ion battery pack (11) is also connected to the battery power acquisition circuit board (13), and the output of the battery power acquisition circuit board (13) is connected to the Android motherboard (24).

8. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The lithium iron phosphate lithium-ion battery pack (11) uses a single IFR18650 lithium iron phosphate battery. The intrinsically safe power board (12) can convert non-safe inputs into intrinsically safe outputs, and is composed of two-stage voltage and current limiting circuit chips and their peripheral resistors and capacitors; The battery power acquisition circuit board (13) can acquire the real-time voltage and real-time remaining capacity information of the lithium iron phosphate lithium-ion battery pack (11) and feed it back to the Android motherboard (24) for real-time display.

9. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The two-core connector (3), four-core connector (4), power switch (5), standby switch (7), return switch (8), and screenshot switch (9) are installed on the intrinsically safe handheld terminal housing and are all electrically connected to the Android motherboard (24).

10. The intrinsically safe handheld terminal for borehole radar data acquisition as described in claim 1, characterized in that, The four-core aviation plug (4) Ethernet port can realize real-time transmission of radar data; it can also realize radar data synchronization based on wireless WiFi transmission.

Images