Rechargeable mining intrinsic safety type wireless data acquisition device

Abstract

The invention discloses a rechargeable mining intrinsic safety type wireless data acquisition device, which comprises a microcontroller, a memory, a front-end acquisition chip, a temperature detection module, a voltage detection module, a current detection module and a charging and discharging management module, the front-end acquisition chip is respectively connected with the temperature detection module, the voltage detection module, the current detection module and the charging and discharging management module; the microcontroller and the memory are connected in a serial communication bus IIC communication mode, and the microcontroller and the front-end acquisition chip are connected in a serial communication bus IIC communication mode. According to the invention, the rechargeable coal safety battery is adopted to supply power to the wireless data acquisition device, so that the wireless data acquisition device can continue to work through the electric quantity provided by the battery under the condition of power failure, thereby ensuring long-time and high-efficiency work. Due to the characteristic, the rechargeable wireless data collector is particularly suitable for application scenes needing long-time monitoring or data collection.

Description

Technical Field

[0001] The invention relates to a rechargeable intrinsically safe wireless data acquisition device for mining. Background Art

[0002] At present, in the fully-mechanized automated coal mining face, some sensors are connected to the data collector to transmit the support status data back to the controller, including the support's inclination, telescopic status, bearing pressure and other parameters. The controller performs real-time analysis and processing based on the received data, thereby realizing automated control and management of the coal mining face.

[0003] Moreover, the existing data collectors in the coal mining industry are all based on wired transmission, which requires wiring, which may lead to complex and costly wiring, and wiring may be restricted in the coal mining environment. Secondly, wired transmission also needs to rely on the controller for power supply, which may increase the difficulty and cost of power supply. In addition, the application of wireless sensors in the coal mining industry also faces some challenges. Wireless sensors are usually powered by batteries, and the battery life may be limited. When the battery is exhausted, the sensor needs to be replaced, which may cause some inconvenience. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a rechargeable intrinsically safe wireless data acquisition device for mining, which is powered by a rechargeable coal-safe battery and can continue to work through the power provided by the battery in the event of a power outage, thereby ensuring long-term and high-efficiency operation.

[0005] The objective of the present invention is achieved through the following technical scheme: a rechargeable intrinsically safe wireless data acquisition device for mining, comprising a microcontroller, a memory, a front-end acquisition chip, a temperature detection module, a voltage detection module, a current detection module, and a charge and discharge management module, wherein the front-end acquisition chip is respectively connected to the temperature detection module, the voltage detection module, the current detection module, and the charge and discharge management module; the microcontroller and the memory, and the microcontroller and the front-end acquisition chip are all connected through a serial communication bus IIC communication mode.

[0006] The microcontroller adopts CH592F chip, and the front-end acquisition chip adopts BQ7694006DBT.

[0007] The temperature detection module includes three thermistors RT1-RT3, three resistors: R18, R39 and R44, and seven capacitors: C12, C21, C28, C30, C31, C33 and C34;

[0008] Thermistor RT1, resistor R18 and capacitor C12 are connected in parallel, one end of the parallel circuit is connected to pin 3 of BQ7694006DBT, and the other end is connected to pin 6 of BQ7694006DBT. At the same time, the end of the parallel circuit connected to pin 3 of the front-end acquisition chip BQ76940 is also grounded;

[0009] Thermistor RT2, resistor R39 and capacitor C30 are connected in parallel, one end of the parallel circuit is connected to pin 10 of BQ7694006DBT, and the other end is connected to pin 13 of BQ7694006DBT;

[0010] Thermistor RT3, resistor R44 and capacitor C33 are connected in parallel, one end of the parallel circuit is connected to pin 15 of BQ7694006DBT, and the other end is connected to pin 18 of BQ7694006DBT;

[0011] One end of capacitors C21 and C28 is grounded, and the other end is connected to pins 7 and 8 of BQ7694006DBT respectively;

[0012] Capacitor C31 is connected across pins 10 and 14 of the BQ7694006DBT, and capacitor C34 is connected across pins 15 and 19 of the BQ7694006DBT.

[0013] The voltage detection module includes four resistors and four capacitors. The four resistors are respectively connected to pins 38 to 41 of BQ7694006DBT. The other end of each resistor is connected in series with a capacitor, and the other end of the capacitor is grounded. Among them, the series end of one resistor and capacitor is grounded, and the series ends of the other three resistors and capacitors are connected to the power supply VC.

[0014] The current detection module includes three resistors R47, R48 and R51, and three capacitors C35-C37. The capacitors C35-C37 are connected in series in sequence, and the other ends of the capacitors C35 and C37 are grounded respectively; the two ends of the resistor R51 are respectively connected to the resistors R47 and R48, the other end of the resistor R48 and the series end of the capacitors C35 and C36 are both connected to the 42 pin of the BQ7694006DBT, and the other end of the resistor R48 and the series end of the capacitors C36 and C37 are both connected to the 43 pin of the BQ7694006DBT; the connection end of the resistor R51 and R47 and the connection end of the resistor R51 and R48 are respectively connected to the charge and discharge management module.

[0015] The charge and discharge management module includes three MOS tubes Q2, Q3 and Q4, four resistors R45, R46, R49, R50, a diode D3, and three batteries BAT1-BAT3; the three batteries BAT1-BAT3 are connected in series, one end of the series-connected battery is connected to the VBAT power supply end, and the other end is connected to the connection end of the resistors R51 and R47; the gate of the MOS tube Q3 is connected to the 1 pin of the BQ7694006DBT, the source is connected to the connection end of the resistors R51 and R48, and the drain is connected to the MOS tube Q 4, and a resistor R49 is connected between the gate and source of the MOS tube Q3; a resistor R50 is directly connected between the source and gate of the MOS tube Q4, and one end of the resistor R50 connected to the source of the MOS tube Q4 is also grounded; a resistor D46 and a diode D3 are connected in parallel, one end of the parallel circuit is connected to the drain of the MOS tube Q2, and the other end is connected to the connection end of the resistor R50 and the drain of the MOS tube Q4; the drain of the MOS tube Q2 is grounded through a resistor R45, and the source is connected to pin 2 of the BQ7694006DBT.

[0016] The acquisition device also includes an internal tilt sensor, which uses an ICM-42688 chip. Pin 1 of the ICM-42688 chip is connected to pin 25 of the microcontroller CH592F, pins 4 and 9 are connected to pins 11 and 10 of the CH592F respectively, and pins 12, 13, and 14 are connected to pins 28, 27, and 26 of the CH592F respectively.

[0017] The acquisition device also includes an RS485 transceiver connected to the microcontroller CH592F, the RS485 transceiver uses a TDA51S485HC chip, the 6th pin and the 3rd pin of the TDA51S485HC chip are respectively connected to the 14th pin and the 15th pin of the CH592F, and the 4th pin and the 5th pin of the TDA51S485HC chip are both connected to the 17th pin of the CH592F;

[0018] Two capacitors C14 and C15 are connected in parallel between pin 1 and pin 2 of the TDA51S485HC chip. The ends of capacitors C14 and C15 connected to pin 1 are connected in series with resistor R12 and then connected to power supply VCC; pins 7 to 10 of the TDA51S485HC chip are all grounded, and a resistor R32 is connected in parallel between pins 12 and 13; the end of resistor R32 connected to pin 12 is connected to diode chip D1, and the end connected to pin 13 is connected to diode chip D2, and the other ends of diode chips D1 and D2 are both grounded. Both diode chips D1 and D2 use PESD1CAN chip; two capacitors C16 and C17 are connected in parallel between pins 14 and 16 of the TDA51S485HC chip, and the ends of capacitors C16 and C17 connected to pin 15 of the TDA51S485HC chip are grounded.

[0019] The battery working voltage acquisition circuit includes four resistors R9, R10, R11, R14 and a MOS tube Q1; the source of the MOS tube Q1 is connected to the VBAT power supply terminal, the gate is connected to the 16th pin of CH592F after being connected in series with the resistor R10, and the resistor R9 is bridged between the source and the gate; the drain of the MOS tube Q1 is connected to the resistors R11 and R14 in sequence, the other end of the resistor R14 is grounded, and the connection end of the resistors R14 and R11 is connected to the 23rd pin of the microcontroller CH592F.

[0020] The beneficial effects of the present invention are:

[0021] 1. Sustainable and efficient work: The wireless data acquisition device is powered by a rechargeable coal-safe battery, so that the wireless data acquisition device can continue to work with the power provided by the battery in the event of a power outage, thereby ensuring long-term and efficient work. This feature makes the rechargeable wireless data acquisition device particularly suitable for application scenarios that require long-term monitoring or data collection.

[0022] 2. It can collect voltage, current and temperature parameters in real time, so as to realize battery monitoring, charge and discharge management, etc.

[0023] 3. Flexible transmission and layout: CH592F with integrated wireless communication is used as the microcontroller, which can transmit the collected data through the wireless network without wiring, thus avoiding tedious wiring work and possible line damage. This makes the layout and installation of the equipment more flexible and convenient, especially in the fully mechanized mining automation working face, its advantages are particularly obvious.

[0024] 4. Optional data interface: The wireless data collector supports a variety of data interfaces, which can easily connect and exchange data with other devices or systems. This makes it more convenient to integrate the device into an existing system or build a new data acquisition network.

[0025] 5. Easy expansion and maintenance: Wireless data collectors usually have a modular design, and modules can be added or reduced as needed to achieve system expansion. At the same time, due to its wireless characteristics, the maintenance of the equipment has become simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a mine-used intrinsically safe wireless data acquisition device;

[0027] Figure 2 This is the circuit diagram of the microcontroller CH592F;

[0028] Figure 3 Circuit diagram of the front-end acquisition chip BQ7694006DBT, temperature detection and voltage detection modules;

[0029] Figure 4 A circuit diagram of a memory;

[0030] Figure 5 It is the circuit diagram of the current detection module and the charge and discharge management module;

[0031] Figure 6 is the circuit diagram of the internal tilt sensor;

[0032] Figure 7 This is the circuit diagram of RS485 transceiver;

[0033] Figure 8 This is the circuit diagram of the battery working voltage acquisition module. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0035] like Figure 1 As shown, a rechargeable mining intrinsically safe wireless data acquisition device of the present invention includes a microcontroller, a memory, a front-end acquisition chip, a temperature detection module, a voltage detection module, a current detection module, and a charge and discharge management module. The front-end acquisition chip is respectively connected to the temperature detection module, the voltage detection module, the current detection module, and the charge and discharge management module; the microcontroller adopts a CH592F chip, such as Figure 2 As shown; the front-end acquisition chip uses BQ7694006DBT, such as Figure 3 As shown in the figure, the microcontroller and the memory, as well as the microcontroller and the front-end acquisition chip are connected via the serial communication bus IIC communication mode. Pins 4 and 5 of BQ7694006DBT are connected to pins 9 and 8 of CH592F respectively, realizing the communication between the two chips.

[0036] like Figure 3 As shown, the temperature detection module (the part on the left side of BQ7694006DBT) ​​includes three thermistors RT1-RT3, three resistors: R18, R39 and R44, and seven capacitors: C12, C21, C28, C30, C31, C33 and C34; the three thermistors RT1-RT3 are all 10kΩ, and the model is 103AT thermistor; as shown Figure 2 As shown, these resistors can be placed at different locations on the battery in order to measure the local temperature of the battery.

[0037] Thermistor RT1, resistor R18 and capacitor C12 are connected in parallel, one end of the parallel circuit is connected to pin 3 of BQ7694006DBT, and the other end is connected to pin 6 of BQ7694006DBT. At the same time, the end of the parallel circuit connected to pin 3 of the front-end acquisition chip BQ76940 is also grounded;

[0038] Thermistor RT2, resistor R39 and capacitor C30 are connected in parallel, one end of the parallel circuit is connected to pin 10 of BQ7694006DBT, and the other end is connected to pin 13 of BQ7694006DBT;

[0039] Thermistor RT3, resistor R44 and capacitor C33 are connected in parallel, one end of the parallel circuit is connected to pin 15 of BQ7694006DBT, and the other end is connected to pin 18 of BQ7694006DBT;

[0040] One end of capacitors C21 and C28 is grounded, and the other end is connected to pins 7 and 8 of BQ7694006DBT respectively;

[0041] Capacitor C31 is connected across pins 10 and 14 of the BQ7694006DBT, and capacitor C34 is connected across pins 15 and 19 of the BQ7694006DBT.

[0042] The voltage detection module ( Figure 3 The part on the right side of BQ7694006DBT in the middle) includes four resistors R19, R30, R31, R40 and four capacitors C13, C27, C29, C32 connected to the four resistors respectively. The four resistors are all 100Ω and the four capacitors are all 0.1μF. The four resistors R40, R31, R30, and R19 are respectively connected to pins 38 to 41 of BQ7694006DBT, and the other end of each resistor is connected in series with a capacitor, and the other end of the capacitor is grounded; wherein, the series connection end of one resistor and capacitor is grounded, and the series connection end of the other three resistors and capacitors is connected to the power supply VC. In this embodiment, the series connection end of resistors R19 and C13 is grounded, and the series connection ends of the remaining three resistors and capacitors are connected to the power supplies VC1, VC2, and VC3 in turn.

[0043] The voltage calculation method is as follows: the front-end acquisition chip BQ7694006DBT uses a 14-bit ADC to measure the battery voltage and temperature, transmits the collected digital voltage value to the CH592F chip, and then converts the 14-bit ADC reading into an analog voltage using the following voltage conversion formula:

[0044] V(cell)=GAIN×ADC(cell)+OFFSET

[0045] The parameter ADC(cell) represents the chip acquisition value, V(cell) represents the cell voltage value, the parameter GAIN unit is μV / LSB, and the parameter OFFSET unit is mV. The gain GAIN and offset OFFSET are stored in the memory when the chip leaves the factory. The memory circuit is as follows Figure 4As shown, the memory uses a 24AA04 chip, whose 5th and 6th pins are respectively connected to the 9th and 8th pins of the microprocessor CH592F chip (the rest of the peripheral circuits are conventional connections in this field and will not be described in detail); the CH592F chip can obtain these two values ​​through the IIC call register, and then perform conversion.

[0046] When the ADC value of the BQ76940 chip is 0x1800, it is converted into decimal as 6144; assuming that the GAIN value is 380μV / LSB and the OFFSET value is 30mV, the result calculated by the above formula is 2365mV, that is, the voltage of the single cell is 2365mV.

[0047] The calculation formula for the overall voltage of a lithium battery is similar to that for a single cell voltage. It is necessary to read the gain GAIN and offset OFFSET, and read the number of cells currently in the system through the register, and substitute them into the following formula:

[0048] V(bat)=4×GAIN×ADC(cell)+(Cells×OFFSET)

[0049] The parameter ADC(cell) represents the chip acquisition value, V(bat) represents the overall voltage value, the parameter GAIN unit is μV / LSB, and the parameter OFFSET unit is mV.

[0050] like Figure 5 As shown, the current detection module ( Figure 5 The left part) includes three resistors R47, R48 and R51, and three capacitors C35~C37. The capacitors C35~C37 are connected in series in sequence, and the other ends of the capacitors C35 and C37 are grounded respectively; the two ends of the resistor R51 are connected to the resistors R47 and R48 respectively, the other end of the resistor R48 and the series end of the capacitors C35 and C36 are connected to the 42 pin of the BQ7694006DBT, and the other end of the resistor R48 and the series end of the capacitors C36 and C37 are connected to the 43 pin of the BQ7694006DBT; the connection end of the resistor R51 and R47 and the connection end of the resistor R51 and R48 are connected to the charge and discharge management module respectively.

[0051] The current sampling method is as follows: the BQ7694006DBT chip collects current through a coulomb counter (CC). CC is a 16-bit integrated ADC that measures the accumulated power flowing through the current sensor within 250ms. The full-scale range of CC is -270mV to +270mV, and its maximum input range is -200mV to +200mV. CH592F reads the accumulated current value of the lithium battery every 250ms by calling the CC-related registers.

[0052] The charge and discharge management module ( Figure 5 The right part) includes three MOS tubes Q2, Q3 and Q4, four resistors R45, R46, R49, R50, a diode D3, and three batteries BAT1~BAT3; the three batteries BAT1~BAT3 are connected in series, one end of the series-connected battery is connected to the VBAT power supply terminal, and the other end is connected to the connection end of resistors R51 and R47; the gate of the MOS tube Q3 is connected to the 1 pin of BQ7694006DBT, the source is connected to the connection end of resistors R51 and R48, and the drain is connected to the The drain of the MOS tube Q2 is connected, and a resistor R49 is connected between the gate and source of the MOS tube Q3; the source and gate of the MOS tube Q4 are directly connected by a resistor R50, and one end of the resistor R50 connected to the source of the MOS tube Q4 is also grounded; a resistor D46 and a diode D3 are connected in parallel, one end of the parallel circuit is connected to the drain of the MOS tube Q2, and the other end is connected to the connection end of the resistor R50 and the drain of the MOS tube Q4; the drain of the MOS tube Q2 is grounded through a resistor R45, and the source is connected to pin 2 of the BQ7694006DBT.

[0053] Through real-time monitoring of the battery's voltage, current, and temperature parameters, if abnormal charging is found during charging, the charging can be turned off through the CHG pin, and the discharge circuit can be controlled through the DSG pin during discharging. The battery capacity is estimated mainly through real-time analysis of the collected voltage. When charging, the voltage of a single battery is collected. If the collected voltage remains at 4.2V, it means it is fully charged. When discharging, if the battery voltage is 2.5V, it means the battery is exhausted.

[0054] like Figure 6 As shown, the acquisition device also includes an internal tilt sensor, which uses an ICM-42688 chip. Pin 1 of the ICM-42688 chip is connected to pin 25 of the microcontroller CH592F, pins 4 and 9 are connected to pins 11 and 10 of the CH592F respectively, and pins 12, 13, and 14 are connected to pins 28, 27, and 26 of the CH592F respectively.

[0055] like Figure 7As shown, the acquisition device also includes an RS485 transceiver connected to the microcontroller CH592F. The RS485 transceiver uses a TDA51S485HC chip. Pins 6 and 3 of the TDA51S485HC chip are respectively connected to pins 14 and 15 of the CH592F, and pins 4 and 5 of the TDA51S485HC chip are both connected to pin 17 of the CH592F. Two capacitors C14 and C15 are connected in parallel between pins 1 and 2 of the TDA51S485HC chip. One end of the capacitor C14 and C15 connected to pin 1 is connected in series with a resistor R12 and then connected to a power supply V CC; Pins 7 to 10 of the TDA51S485HC chip are all grounded, and a resistor R32 is connected in parallel between pins 12 and 13; the end of the resistor R32 connected to pin 12 is connected to the diode chip D1, and the end connected to pin 13 is connected to the diode chip D2, and the other ends of the diode chips D1 and D2 are both grounded, and the diode chips D1 and D2 both use the PESD1CAN chip; two capacitors C16 and C17 are connected in parallel between pins 14 and 16 of the TDA51S485HC chip, and the ends of the capacitors C16 and C17 connected to pin 15 of the TDA51S485HC chip are grounded.

[0056] like Figure 8 As shown, the battery working voltage acquisition circuit includes four resistors R9, R10, R11, R14 and a MOS tube Q1; the source of the MOS tube Q1 is connected to the VBAT power supply terminal, the gate is connected to the 16th pin of CH592F after being connected in series with the resistor R10, and the resistor R9 is bridged between the source and the gate; the drain of the MOS tube Q1 is connected to the resistors R11 and R14 in sequence, the other end of the resistor R14 is grounded, and the connection end of the resistors R14 and R11 is connected to the 23rd pin of the microcontroller CH592F, and the collected 1 / 2 battery voltage ADC0 is input to the microcontroller.

[0057] like Figure 2As shown, the acquisition device also includes a X322532MOB4SI crystal oscillator chip that provides a 30MHz crystal oscillator frequency for CH592F. Pins 1 and 3 of X322532MOB4SI are connected to pins 18 and 19 of CH592F respectively. A resistor R8 is connected between pins 1 and 3 of X322532MOB4SI. Pin 3 is connected to one end of capacitor C2. Pin 1 is connected to one end of capacitor C3. The other ends of capacitors C2 and C3 are both grounded. Pin 4 of CH592F is connected to an inductor L1, which adopts SWPA4030S100MT. The other end of inductor L1 is connected to 3.3V power supply VCC through resistor R27. Pin 3 of CH592F is also connected to resistor R27, and connected to 3.3V power supply VCC through R27. Pins 6 and 7 of CH592F are also connected to resistors R26 and R25 respectively, and then connected to the external circuit. The remaining peripheral circuits of CH592F are conventional choices in this field and will not be described in detail.

[0058] The present invention adopts a large-capacity coal-fired battery to provide more power reserves, thereby supporting the wireless data acquisition device to work continuously for a long time underground, reducing equipment downtime caused by insufficient battery power, and improving production efficiency.

[0059] The wireless data logger adopts intrinsically safe design and can operate safely in flammable and explosive mine environments. It complies with strict safety standards and regulations to ensure that it will not cause fire or explosion under extreme conditions.

[0060] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A rechargeable intrinsically safe wireless data acquisition device for mining, characterized in that: It includes a microcontroller, a memory, a front-end acquisition chip, a temperature detection module, a voltage detection module, a current detection module, and a charge and discharge management module. The front-end acquisition chip is connected to the temperature detection module, the voltage detection module, the current detection module, and the charge and discharge management module respectively; the microcontroller and the memory, and the microcontroller and the front-end acquisition chip are connected through a serial communication bus IIC communication mode.

2. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 1, characterized in that: The microcontroller adopts CH592F chip, and the front-end acquisition chip adopts BQ7694006DBT.

3. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 2, characterized in that: The temperature detection module includes three thermistors RT1-RT3, three resistors: R18, R39 and R44, and seven capacitors: C12, C21, C28, C30, C31, C33 and C34; Thermistor RT1, resistor R18 and capacitor C12 are connected in parallel, one end of the parallel circuit is connected to pin 3 of BQ7694006DBT, and the other end is connected to pin 6 of BQ7694006DBT. At the same time, the end of the parallel circuit connected to pin 3 of the front-end acquisition chip BQ76940 is also grounded; Thermistor RT2, resistor R39 and capacitor C30 are connected in parallel, one end of the parallel circuit is connected to pin 10 of BQ7694006DBT, and the other end is connected to pin 13 of BQ7694006DBT; Thermistor RT3, resistor R44 and capacitor C33 are connected in parallel, one end of the parallel circuit is connected to pin 15 of BQ7694006DBT, and the other end is connected to pin 18 of BQ7694006DBT; One end of capacitors C21 and C28 is grounded, and the other end is connected to pins 7 and 8 of BQ7694006DBT respectively; Capacitor C31 is connected across pins 10 and 14 of the BQ7694006DBT, and capacitor C34 is connected across pins 15 and 19 of the BQ7694006DBT.

4. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 2, characterized in that: The voltage detection module includes four resistors and four capacitors. The four resistors are respectively connected to pins 38 to 41 of BQ7694006DBT. The other end of each resistor is connected in series with a capacitor, and the other end of the capacitor is grounded. Among them, the series end of one resistor and capacitor is grounded, and the series ends of the other three resistors and capacitors are connected to the power supply VC.

5. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 2, characterized in that: The current detection module includes three resistors R47, R48 and R51, and three capacitors C35-C37. The capacitors C35-C37 are connected in series in sequence, and the other ends of the capacitors C35 and C37 are grounded respectively; the two ends of the resistor R51 are respectively connected to the resistors R47 and R48, the other end of the resistor R48 and the series end of the capacitors C35 and C36 are both connected to the 42 pin of the BQ7694006DBT, and the other end of the resistor R48 and the series end of the capacitors C36 and C37 are both connected to the 43 pin of the BQ7694006DBT; the connection end of the resistor R51 and R47 and the connection end of the resistor R51 and R48 are respectively connected to the charge and discharge management module.

6. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 5, characterized in that: The charge and discharge management module includes three MOS tubes Q2, Q3 and Q4, four resistors R45, R46, R49, R50, a diode D3, and three batteries BAT1-BAT3; the three batteries BAT1-BAT3 are connected in series, one end of the series-connected battery is connected to the VBAT power supply end, and the other end is connected to the connection end of the resistors R51 and R47; the gate of the MOS tube Q3 is connected to the 1 pin of the BQ7694006DBT, the source is connected to the connection end of the resistors R51 and R48, and the drain is connected to the MOS tube Q 4, and a resistor R49 is connected between the gate and source of the MOS tube Q3; a resistor R50 is directly connected between the source and gate of the MOS tube Q4, and one end of the resistor R50 connected to the source of the MOS tube Q4 is also grounded; a resistor D46 and a diode D3 are connected in parallel, one end of the parallel circuit is connected to the drain of the MOS tube Q2, and the other end is connected to the connection end of the resistor R50 and the drain of the MOS tube Q4; the drain of the MOS tube Q2 is grounded through a resistor R45, and the source is connected to pin 2 of the BQ7694006DBT.

7. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 2, characterized in that: The acquisition device also includes an internal tilt sensor, which uses an ICM-42688 chip. Pin 1 of the ICM-42688 chip is connected to pin 25 of the microcontroller CH592F, pins 4 and 9 are connected to pins 11 and 10 of the CH592F respectively, and pins 12, 13, and 14 are connected to pins 28, 27, and 26 of the CH592F respectively.

8. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 2, characterized in that: The acquisition device also includes an RS485 transceiver connected to the microcontroller CH592F, the RS485 transceiver uses a TDA51S485HC chip, the 6th pin and the 3rd pin of the TDA51S485HC chip are respectively connected to the 14th pin and the 15th pin of the CH592F, and the 4th pin and the 5th pin of the TDA51S485HC chip are both connected to the 17th pin of the CH592F; Two capacitors C14 and C15 are connected in parallel between pin 1 and pin 2 of the TDA51S485HC chip. The ends of capacitors C14 and C15 connected to pin 1 are connected in series with resistor R12 and then connected to power supply VCC; pins 7 to 10 of the TDA51S485HC chip are all grounded, and a resistor R32 is connected in parallel between pins 12 and 13; the end of resistor R32 connected to pin 12 is connected to diode chip D1, and the end connected to pin 13 is connected to diode chip D2, and the other ends of diode chips D1 and D2 are both grounded. Both diode chips D1 and D2 use PESD1CAN chip; two capacitors C16 and C17 are connected in parallel between pins 14 and 16 of the TDA51S485HC chip, and the ends of capacitors C16 and C17 connected to pin 15 of the TDA51S485HC chip are grounded.

9. A rechargeable intrinsically safe wireless data acquisition device for mining according to claim 2, characterized in that: The battery working voltage acquisition circuit includes four resistors R9, R10, R11, R14 and a MOS tube Q1; the source of the MOS tube Q1 is connected to the VBAT power supply terminal, the gate is connected to the 16th pin of CH592F after being connected in series with the resistor R10, and the resistor R9 is bridged between the source and the gate; the drain of the MOS tube Q1 is connected to the resistors R11 and R14 in sequence, the other end of the resistor R14 is grounded, and the connection end of the resistors R14 and R11 is connected to the 23rd pin of the microcontroller CH592F.

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