Mining intrinsic safety type identification card searching instrument

Abstract

The embodiment of the utility model discloses a mining intrinsic safety type identification card searching instrument. In one specific implementation mode, the UWB positioning module comprises a shell, and a main control board, a battery and a UWB positioning module are arranged in the shell; a touch display screen, a switch key, an antenna and a charging aviation socket are arranged outside the shell; wherein the UWB positioning module, the switch key, the touch display screen and the charging aviation socket are electrically connected with the main control board respectively; the antenna is electrically connected with the UWB positioning module; and the battery is connected with the charging aviation socket. The searching instrument is small in size, simple in function module and convenient to understand and use, integrates the functions of wireless data receiving, data processing, storage, data transmission and the like, and is used for positioning a system identification card by underground searching personnel in a coal mine and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of identification card search instruments, and more specifically, to an intrinsically safe identification card search instrument for mining. Background Art

[0002] With the development and improvement of the coal mine economy, the country's requirements for coal mine safety production have been continuously improved in recent years. The coal mine personnel positioning system is particularly important. As one of the six major coal mine safety systems, the coal mine personnel positioning system has important safety significance. It can not only locate the specific location of coal mine workers, but also effectively carry out rescue work and reduce casualties. As an important part of the personnel positioning system, the identification card searcher integrates radio frequency identification technology and has a friendly human-computer interaction interface. It is used to detect the positioning card information within the coverage range of the antenna. It can be used with the positioning card for personnel search and rescue, attendance, positioning card information collection and calling, and quick access to personnel information. Utility Model Content

[0003] The utility model aims to provide a mine-used intrinsically safe identification card search instrument to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a mine intrinsically safe identification card search instrument, comprising:

[0006] case,

[0007] The main control board, battery and UWB positioning module are set in the shell; the touch screen, switch button, antenna and charging aviation socket are set outside the shell;

[0008] Among them, the UWB positioning module, the switch button, the touch display screen and the charging aviation socket are electrically connected to the main control board respectively; the antenna is electrically connected to the UWB positioning module; and the battery is connected to the charging aviation socket.

[0009] Optionally, the housing includes a bottom shell and a plurality of cover plates, and the plurality of cover plates are fixed by bolts;

[0010] The side of the shell is provided with a charging aviation socket slot and a connection buckle;

[0011] A touch display screen mounting plate, a main control board mounting plate, an antenna mounting plate, a UWB positioning module mounting plate and a battery box are arranged inside the shell.

[0012] Optionally, the housing is further provided with a first UWB radio frequency interface and a second UWB radio frequency interface, which are respectively provided on opposite sides of the housing.

[0013] Optionally, the UWB positioning module includes a first UWB positioning module and a second UWB positioning module, the first UWB positioning module is electrically connected to a first UWB radio frequency interface, and the second UWB positioning module is electrically connected to a second UWB radio frequency interface.

[0014] Optionally, the shell is further provided with an indicator light module, and the indicator light module is electrically connected to the main control board.

[0015] Optionally, the indicator light module includes two indicator lights, and the indicator lights and the touch display screen are arranged on the same side of the shell.

[0016] Optionally, the indicator light module is used to display the working status of the UWB positioning module.

[0017] Optionally, the search instrument further includes a power supply circuit disposed in the shell, and the battery supplies power to the main control board, the UWB positioning module, the touch display screen and the indicator light module through the power supply circuit.

[0018] Optionally, the main control board is used to process the carrier signal received by the antenna from the identification card, and send the processed data to the touch screen for display;

[0019] The touch display screen is used to display the working status of the search instrument in real time.

[0020] Optionally, the search instrument further includes a reset circuit, a storage interface circuit, an atmospheric pressure sensor circuit and a clock circuit which are arranged in the housing and are electrically connected to the main control board respectively;

[0021] The storage interface circuit is used to transfer the internal data of the search instrument to the external device;

[0022] The clock circuit is used to cooperate with the main control board to send control signals.

[0023] The beneficial effects of the utility model are as follows:

[0024] The search instrument of the utility model has a small size, simple functional modules, is easy to understand and use, integrates the functions of wireless data reception, data processing, storage, data transmission and the like, and is used for searching identification cards of personnel positioning systems in underground coal mines and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0026] Figure 1 The external structure diagram of the utility model is shown.

[0027] Figure 2The internal structure diagram of the utility model is shown.

[0028] Figure 3 The utility model is shown in the schematic diagram of the power supply circuit.

[0029] Figure 4 A schematic diagram of a battery protection circuit of the present utility model is shown.

[0030] Figure 5 A schematic diagram of a main control board of the utility model is shown.

[0031] Figure 6 A schematic diagram of a touch display screen of the present invention is shown.

[0032] Figure 7 A schematic diagram of a storage interface circuit of the utility model is shown.

[0033] Figure 8 A schematic diagram of a clock circuit of the present utility model is shown.

[0034] Fig. 9 A schematic diagram of an indicator light module of the present utility model is shown.

[0035] Fig.10 A schematic diagram of a first UWB positioning module of the present invention is shown.

[0036] Fig.11 A schematic diagram of a second UWB positioning module of the present invention is shown.

[0037] Fig.12 The schematic diagram of the atmospheric pressure sensor circuit of the utility model is shown. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the present invention, the following embodiments and attached drawings are provided. Figure 1-12 The utility model is further described. Similar components in the drawings are represented by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the utility model.

[0039] The utility model provides a mine intrinsically safe identification card search instrument, comprising:

[0040] case,

[0041] The main control board, battery and UWB positioning module are set in the shell; the touch screen, switch button, antenna and charging aviation socket are set outside the shell;

[0042] The UWB positioning module, the switch button, the touch screen and the charging aviation socket are electrically connected to the main control board respectively; the antenna is electrically connected to the UWB positioning module; the battery is connected to the charging aviation socket. The connecting buckle is used to fasten the lanyard lock.

[0043] like Figure 1 and Figure 2 As shown, the bottom shell 1, the charging port 2, the switch button 3, the connecting buckle 4, the antenna 5, the display screen mounting plate 6, the main control board 7, the antenna mounting plate 8, the battery 9, and the battery box 10.

[0044] In one embodiment, the housing includes a bottom shell and a plurality of cover plates, and the plurality of cover plates are fixed by bolts;

[0045] The side of the shell is provided with a charging aviation socket slot and a connection buckle;

[0046] A touch display screen mounting plate, a main control board mounting plate, an antenna mounting plate, a UWB positioning module mounting plate and a battery box are arranged inside the shell.

[0047] In one embodiment, the housing is further provided with a first UWB radio frequency interface and a second UWB radio frequency interface, which are respectively provided on opposite sides of the housing.

[0048] In one embodiment, the UWB positioning module includes a first UWB positioning module and a second UWB positioning module, the first UWB positioning module is electrically connected to a first UWB radio frequency interface, and the second UWB positioning module is electrically connected to a second UWB radio frequency interface.

[0049] In one embodiment, the housing is further provided with an indicator light module, and the indicator light module is electrically connected to the main control board.

[0050] In one embodiment, the indicator light module includes two indicator lights, and the indicator lights and the touch display screen are arranged on the same side of the housing.

[0051] In one embodiment, the indicator light module is used to display the working status of the UWB positioning module.

[0052] In one embodiment, the search instrument further includes a power supply circuit disposed in the housing, and the battery supplies power to the main control board, the UWB positioning module, the touch display screen and the indicator light module through the power supply circuit.

[0053] In one embodiment, the main control board is used to process the carrier signal received by the antenna from the identification card, and send the processed data to the touch screen for display;

[0054] The touch display screen is used to display the working status of the search instrument in real time.

[0055] In one embodiment, the search instrument further includes a reset circuit, a storage interface circuit, an atmospheric pressure sensor and a clock circuit connected to the main control board;

[0056] The storage interface circuit is used to transfer the internal data of the search instrument to the external device;

[0057] The clock circuit is used to cooperate with the main control board to send control signals.

[0058] In one embodiment, a power supply circuit is provided, wherein:

[0059] The first output port of the charging terminal is connected to the second power supply terminal DGND, and the second output port is connected to the first end of the second diode D2 and the second end of the first TVS diode;

[0060] A first end of the first TVS diode is connected to the second power supply end DGND;

[0061] The second end of the second diode D2 is connected to the first end of the fuse F1 and the first power supply end VC;

[0062] A battery pack, a first end of which is connected to the second end of the fuse F1 and the first end of the first diode D1, and a second end of which is connected to the second power supply terminal DGND;

[0063] The first end of the switch S1 is connected to the second end of the first diode D1 and the first end of the second capacitor C2, and the second end of the switch S1 is connected to the first end of the third diode D3, the first end of the sixth resistor R6, and the first end of the fifth resistor R5; the sixth resistor R6 is connected to the second power supply terminal DGND;

[0064] The second end of the second capacitor C2 is connected to the second power supply end DGND;

[0065] A first end of the fifth diode D5 is connected to the third pin of the first chip of the main control board, and a second end of the fifth diode D5 is connected to the second end of the third diode D3 and the first end of the second resistor R2;

[0066] The first end of the first transistor Q1 is connected to the second end of the fifth resistor R5, the second end is connected to the second pin of the first chip of the main control board and the first end of the third resistor R3, and the third end is connected to the second power supply terminal DGND;

[0067] The third resistor R3 is connected to the second power supply 3V3;

[0068] The first pin of the first power chip IC12359 is connected to the first end of the first capacitor C1.

[0069] The second pin is connected to the second power supply terminal DGND;

[0070] The third pin is connected to the second end of the first resistor R1 and the first end of the fourth resistor R4;

[0071] The fourth pin is connected to the second end of the second resistor R2 and the first end of the fourth capacitor C4;

[0072] The fifth pin is connected to the first end of the second capacitor C4;

[0073] The sixth pin is connected to the first end of the first inductor L1, the second end of the first capacitor C1, and the first end of the fourth diode D4;

[0074] The second end of the fourth capacitor C4 is connected to the second power supply end GND;

[0075] A second end of the fourth diode D4 is connected to the second power supply end GND;

[0076] The second end of the first inductor L1 is connected to the first end of the first resistor R1, the first end of the fifteenth capacitor C15, and the first end of the third capacitor;

[0077] The second end of the fourth resistor R4, the second end of the fifteenth capacitor C15, and the second end of the third capacitor C3 are connected to the second power supply terminal GND;

[0078] The first end P+ of the switch button is connected to the first end of the switch S1, and the second end P- is connected to the second end of the switch S1;

[0079] The first pin of the second power chip IC2 is connected to the first end of the third capacitor C3.

[0080] The second pin is connected to the second power supply terminal GND.

[0081] The third pin is connected to the twenty-ninth pin of the first chip of the main control board.

[0082] The fifth pin is connected to the first end of the first charging and discharging capacitor E1 to output the second power supply 3V3;

[0083] The second end of the first charging and discharging capacitor E1 is connected to the second power supply end GND;

[0084] The first pin and the third pin of the third power chip IC3 are connected to the first end of the third capacitor C3.

[0085] The second pin is connected to the second power supply terminal GND.

[0086] The fifth pin outputs the first power source 3V3_1.

[0087] Also includes power detection circuit

[0088] A first end of the seventh resistor R7 is connected to the second end of the fuse F1, and a second end thereof is connected to a first end of the eighth resistor R8, a first end of the sixth capacitor C6, and a first end of the sixth diode;

[0089] The first end of the sixth capacitor is connected to the fourth pin of the first chip of the main control board;

[0090] The second end of the eighth resistor R8, the second end of the sixth capacitor C6, and the second end of the sixth diode are connected to the second power supply terminal GND.

[0091] like Figure 3 As shown, JP3 is the charging terminal. When the device needs to be charged, the external charger is connected to JP3, and the battery BT1 is charged through the SMD diode D2 and the fuse F1. The maximum charging voltage is 8.4V. When the battery BT1 is working normally, it provides 7.4V power. When the S1 button is pressed, the integrated circuit IC1 works and outputs 5V power. The power is output through the integrated circuits IC2 and IC3 (SPXM5-3.3) as 3V3_1 and 3V3 respectively, for use by various components in the circuit. After pressing the S1 button again, the integrated circuit IC1 stops working, there is no output power, and the device is in a stopped state. The search instrument has a power monitoring function (see Figure 3 Lower right corner): The device determines the battery source voltage through the voltage ratio between R7 and R8. When the battery voltage is lower than DC6.4V, the microcontroller receives the voltage information and displays the battery undervoltage on the display.

[0092] In one embodiment, the battery protection circuit

[0093] The first pin of the sixth chip U6 is connected to the first end of the twelfth resistor R12 and the first end of the nineteenth resistor R19;

[0094] The second pin is connected to the first end of the seventh power chip IC7 and the second end of the second MOS tube T2;

[0095] The third pin is connected to the second end of the tenth resistor R10 and the first end of the thirteenth resistor R13;

[0096] The fourth pin is connected to the second end of the seventh power chip IC7;

[0097] The fifth pin, the sixth pin, the seventh pin and the eighth pin are connected in series in sequence.

[0098] The first terminal BAT1+ of the lithium-ion battery is connected to the first terminal of the twenty-first resistor R21;

[0099] The second terminal BAT2+ of the lithium ion battery is connected to the first terminal of the twenty-second resistor R22;

[0100] The second end of the twenty-second resistor R22 is connected to the fifth end of the seventh power chip IC7 and the first end of the fourteenth capacitor C14; the second end of the fourteenth capacitor C14 is connected to the sixth end of the seventh power chip IC7;

[0101] The second end of the twenty-first resistor R21 is connected to the first end of the fifth capacitor C5 and the fourth end of the seventh power chip IC7;

[0102] The second end of the fifth capacitor C5 is connected to the sixth end of the seventh power chip IC7 and the second end of the eleventh resistor R11;

[0103] The third end of the seventh power chip IC7 is connected to the first end of the eleventh resistor R11 and the first end of the tenth resistor R10;

[0104] The second end of the eleventh resistor R11 is connected to the second end of the fifth capacitor C5, the third end of the second MOS transistor T2, and the first end of the sixteenth resistor R16;

[0105] A first end of the second MOS transistor T2 is connected to a second end of a sixteenth resistor R16 and a second end of a seventeenth resistor R17;

[0106] The B-terminal is connected to the first end of the sixteenth resistor R16 and the second end of the twelfth resistor R12;

[0107] A second end of the thirteenth resistor R13 is connected to a second end of the eighth capacitor C8;

[0108] A first end of the seventeenth resistor R17 is connected to a first end of the eighth capacitor C8; wherein a second end of the thirteenth resistor is a negative electrode P- for charging and discharging.

[0109] The first terminal BAT1+ of the lithium ion battery is connected to the first terminal of the eighteenth resistor R18;

[0110] The second terminal BAT2+ of the lithium ion battery is connected to the first terminal of the fourteenth resistor R14;

[0111] The second end of the fourteenth resistor R14 is connected to the fifth end of the fourth power chip IC4 and the first end of the seventh capacitor C7; the second end of the seventh capacitor C7 is connected to the sixth end of the fourth power chip IC4;

[0112] The second end of the eighteenth resistor R18 is connected to the first end of the thirteenth capacitor C13 and the fourth end of the fourth power chip IC4;

[0113] The second end of the thirteenth capacitor C13 is connected to the sixth end of the fourth power chip IC4;

[0114] The third terminal of the fourth power chip IC4 is connected to the first terminal of the nineteenth resistor R19;

[0115] The first end of the fourth MOS transistor T4 is connected to the second end of the fourth power chip IC4.

[0116] The second end is connected to the first end of the fourteenth resistor, and the third end is connected to the third end of the fifth MOS transistor T5;

[0117] The first end of the fifth MOS transistor T5 is connected to the first end of the fourth power chip IC4, and the second end is connected to the second end of the twentieth resistor R20.

[0118] The first pin of the seventh chip is connected to the first end of the ninth capacitor C9 and the second end of the fifteenth resistor R15;

[0119] The second pin is connected to the second end of the third MOS tube T3, the first end of the twentieth resistor R20, and the second end of the ninth capacitor C9;

[0120] The third pin is connected to the first end of the seventeenth capacitor C17, and the second end of the seventeenth capacitor C17 is connected to the second end of the fourteenth resistor; the third pin is the positive electrode P+

[0121] The fourth pin is connected to the second end of the seventeenth capacitor C17;

[0122] The fifth pin, the sixth pin, the seventh pin, and the eighth pin are connected in series

[0123] The seventh pin is connected to the second ends of the eleventh capacitor C11 and the twelfth capacitor C12;

[0124] A first end of the third MOS transistor T3 is connected to a first end of the eleventh capacitor C11, a first end of the twelfth capacitor C12, and a first end of the tenth resistor R10;

[0125] The third end of the third MOS transistor T3 is connected to the second end of the tenth resistor R10 and BAT2+.

[0126] like Figure 4 As shown, the internal battery of the battery protection circuit adopts PL115565 lithium manganese oxide lithium ion battery (4 cells, two in parallel and two in series, 3Ah / 3.7V) connected in series with the battery protection board for power supply, and is cast with Hasuncast 776FR epoxy resin and fixed in the battery box.

[0127] The safety performance of lithium manganese oxide lithium-ion batteries meets the requirements of MT / T1051-2007 "Lithium-ion Batteries for Mining Lamps". The inspection report is issued by Shanghai Coal Science Testing Technology Co., Ltd. The battery is connected in series with a double overvoltage and overcurrent protection board, with a maximum output voltage Uo: 8.4V and a maximum output current Io: 1A. The output parameters meet the safety requirements of GB / T 3836.4-2021 for intrinsically safe products for mining. The protection circuit is as follows Figure 4 :

[0128] The lithium battery protection IC (IC7, IC4) plus the MOS tube (U6, U7) circuit, two stages in series, constitute a double protection circuit. The lithium battery protection IC has a precise comparator to obtain reliable protection parameters, and the MOS tube acts as a high-speed switch in the main circuit, responsible for cutting off and conducting the charge and discharge circuit.

[0129] Lithium battery protection IC (R5460N) is used for overcharge / overdischarge protection of lithium-ion / lithium polymer rechargeable batteries. It also has a built-in load short-circuit protection circuit to prevent large load short-circuit current; built-in overcurrent protection circuit to prevent discharge overcurrent and charge overcurrent. It consists of six voltage detectors, a reference unit, a delay circuit, a load short-circuit protection circuit, an oscillator, a counter and a logic module. When the charging voltage / charging current changes from low to high and exceeds the threshold of the corresponding detector, the output of the pin cout will switch to a low level after a built-in fixed delay. When the MOS tube (9926B) receives this low-level signal, it will immediately cut off the charging circuit. How to release the overcharge protection: After detecting overcharge or charging overcurrent, disconnect the battery from the charger and then connect the load. When the battery voltage is lower than the overcharge detector threshold, the overcharge detector can be reset and the cout output will return to a high level. If the charger is always connected to the battery, the overcharge protection will be released when the battery voltage is lower than the overcharge release voltage. The same applies to overdischarge and short-circuit protection.

[0130] In one embodiment, the main control board,

[0131] The first chip U1,

[0132] The first pin inputs the first power supply 3V3_1,

[0133] The eighth pin is connected to the first end of the second crystal oscillator Z2.

[0134] The ninth pin is connected to the second end of the second crystal oscillator Z2.

[0135] The fifty-second pin is connected to the second end of the first crystal oscillator Z1 and the first end of the eighth capacitor C8.

[0136] The second end of the eighth capacitor C8 is connected to the second power supply end DGND;

[0137] The fifty-third pin is connected to the first end of the first crystal oscillator Z1 and the first end of the seventh capacitor C7.

[0138] The second end of the seventh capacitor C7 is connected to the second power supply end DGND;

[0139] The fifty-fourth pin is connected to the first pin of the first communication interface P1.

[0140] The fifty-fifth pin is connected to the second pin of the first communication interface P1.

[0141] The fifty-sixth pin is connected to the fourth pin of the first communication interface P1,

[0142] The fifty-seventh pin is connected to the fifth pin of the first communication interface P1,

[0143] The fifty-eighth pin is connected to the seventh pin of the first communication interface P1.

[0144] The sixty-second pin is connected to the second power supply terminal DGND and the third power supply terminal AGND;

[0145] The sixty-third pin is connected to the second power supply terminal DGND;

[0146] The sixty-fourth pin inputs the second power supply 3V3;

[0147] The third pin of the first communication interface P1 inputs the first power supply 3V3_1, and the sixth pin is connected to the second power supply terminal DGND;

[0148] Reset Circuit

[0149] A first pin of the fifth power chip IC5 is connected to the second power terminal DGND;

[0150] The second pin is connected to the first end of the eighteenth resistor R18;

[0151] A second end of the eighteenth resistor R18 is connected to the second power supply end DGND;

[0152] The third pin inputs the first power source 3V3_1.

[0153] Figure 5 In the example, U1 (MSP430F) mixed signal microcontroller, reset circuit, and program download power supply are all Figure 3 3V3_1 provided by IC3 in the circuit. U1 is the main control chip, and various functions of the product are realized through internal embedded software. The ultra-low power microcontroller (MCU) of Texas Instruments MSP430TM series includes a variety of devices, which are equipped with different peripheral sets to meet the needs of various applications. This architecture can be used with five low-power modes and is optimized for extending battery life in portable measurement applications. The device has a powerful 16-bit RISC CPU, 16-bit registers, and a constant generator that helps to achieve maximum coding efficiency. The digitally controlled oscillator (DCO) can complete the wake-up from low-power mode to active mode in less than 6us.

[0154] In one embodiment, a display screen, which

[0155] The first pin, the second pin and the third pin of the display chip JP4 are connected to the fourth power supply terminal 5V;

[0156] The fourth pin is connected to the thirty-fourth pin of the first chip U1,

[0157] The fifth pin is connected to the thirty-fifth pin of the first chip U1;

[0158] The eighth pin, the ninth pin and the tenth pin are connected to the second power supply terminal DGND;

[0159] like Figure 6 As shown, through Figure 3 The 5V power supply provided by IC1 powers the device display screen, and the SCR_TXD and SCR_RXD of the mixed-signal microcontroller U1 transmit data to the display screen, which displays the working status of the searcher in real time.

[0160] In one embodiment, a storage interface circuit, which,

[0161] A storage interface circuit chip, a first pin of which is connected to a first end of a fifth capacitor C5 and a second power supply end DGND;

[0162] The second pin, the third pin, the fourth pin and the seventh pin are connected to the second power supply terminal DGND;

[0163] The fifth pin is connected to the 44th pin of the first chip U1 and the first end of the tenth resistor R10;

[0164] The sixth pin is connected to the forty-fifth pin of the first chip U1 and the first end of the ninth resistor R9;

[0165] A second end of the fifth capacitor C5 is connected to the second power supply 3V3, a second end of the ninth resistor R9, and a second end of the tenth resistor R10;

[0166] The eighth pin is connected to the second power supply 3V3.

[0167] like Figure 7 As shown, through Figure 3The 3V3 power supply provided by IC2 in the middle powers IC6 (FM24CL64) to realize the function of data storage. FM24CL64B is a 64kbit non-volatile memory that uses advanced ferroelectric processing. Ferroelectric random access memory or F-RAM is non-volatile and performs read and write operations similar to RAM. It provides reliable data retention for 151 years while eliminating the complexity, overhead and system-level reliability issues caused by EEPROM and other non-volatile items. Unlike EEPROM, FM24CL64B performs write operations at bus speed and has no write delays. Data is written to the memory array immediately after each byte is successfully transferred to the device. The next bus cycle can start without data polling. In addition, this product has strong write endurance compared to other non-volatile memories. In addition, F-RAM consumes much less power than EEPROM when writing because the write operation does not require the internal boost of the power supply voltage of the write circuit.

[0168] In one embodiment, a clock circuit, which

[0169] The clock chip has a first pin connected to a first end of a fourteenth capacitor C14 and a second end of a third crystal oscillator Z3;

[0170] The second pin is connected to the first end of the thirteenth capacitor C13 and the second end of the third crystal oscillator Z3;

[0171] The third pin and the fourth pin are connected to the second power supply terminal DGND;

[0172] The fifth pin is connected to the sixteenth pin of the first chip and the first end of the seventeenth resistor R17;

[0173] The sixth pin is connected to the fifteenth pin of the first chip and the first end of the sixteenth resistor R16;

[0174] The seventh pin is connected to the fourteenth pin of the first chip and the first end of the fifteenth resistor R15;

[0175] The eighth pin is connected to the first end of the twelfth capacitor C12 and the fifth power supply end Vsd;

[0176] The second end of the fourteenth capacitor C14 is connected to the second end of the thirteenth capacitor C13 and the second power supply end DGND;

[0177] A first end of the eighth diode D8 is connected to the second end of the fifteenth resistor R15, the second end of the sixteenth resistor R16, the second end of the seventeenth resistor R17, and the second power supply 3V3;

[0178] The second end of the eighth diode D8 is connected to the fifth power supply terminal Vsd and the second end of the seventh diode D7;

[0179] The second end of the twelfth capacitor C12 is connected to the second power supply terminal DGND and the first end of the battery BT2;

[0180] A first end of the seventh diode D7 is connected to the second end of the battery BT2.

[0181] like Figure 8 As shown, the power supply of the clock circuit comes from Figure 3 IC2 provides 3V3, and the clock circuit cooperates with the microcontroller and embedded software to realize the time stamp function. U2 (SD2068) is a real-time clock chip with a standard IIC interface. The CPU can use this interface to read and write the data of the 32-byte registers in the chip (including time registers, alarm registers, control registers, and general SRAM registers) through 5-bit address addressing. SD2068 has a single-channel timing / alarm interrupt output, and the alarm interrupt time can be set to 100 years. SD2068 has a built-in clock accuracy digital adjustment function, which can correct the clock deviation in a wide range (-189ppm~+189ppm, with a resolution of 3.05ppm), and can set the adjustment value to adapt to temperature changes through an external temperature sensor, realizing high-precision timing function in a wide temperature range. SD2068 has a backup battery input pin VBAT. When the chip detects that the main power supply VDD drops below the backup battery voltage, the chip will automatically switch to the backup battery connected to VBAT for power supply.

[0182] In one embodiment, Fig.12 As shown, the atmospheric sensor circuit

[0183] Its atmospheric pressure sensor IC8

[0184] The first pin is connected to the second power supply terminal DGND;

[0185] The second pin is connected to the first end of the twelfth resistor R12;

[0186] The third pin is connected to the first end of the thirteenth resistor R13 and the forty-seventh pin of the first chip;

[0187] The fourth pin is connected to the 48th pin of the first chip and the first end of the fourteenth resistor R14;

[0188] The fifth pin is connected to the second power supply terminal DGND;

[0189] The sixth pin is connected to the second power supply 3V3;

[0190] The seventh pin is connected to the second power supply terminal DGND;

[0191] The eighth pin is connected to the second power supply 3V3;

[0192] A second end of the twelfth resistor R12 , a second end of the thirteenth resistor R13 , and a second end of the fourteenth resistor R14 are connected to the second power source 3V3 .

[0193] In one embodiment, the indicator light module,

[0194] The first pin of the UWB positioning module inputs the second power supply 3V3,

[0195] The third pin is connected to the thirty-third pin of the first chip U1;

[0196] The fifth pin is connected to the thirty-second pin of the first chip U1;

[0197] The seventh pin is connected to the second power supply terminal DGND;

[0198] The ninth pin is connected to the first end of the twenty-first resistor R21;

[0199] The tenth pin is connected to the first end of the twenty-second resistor R22;

[0200] The first end of the second transistor Q2 is connected to the second end of the twenty-first resistor R21.

[0201] The second end is connected to the first end of the first indicator light, and the third end is connected to the second power supply end DGND;

[0202] A first end of a nineteenth resistor R19 is connected to the second power supply 3V3, and a second end thereof is connected to the second end of the first indicator light;

[0203] The first end of the third transistor Q2 is connected to the second end of the twenty-second resistor R22, the second end is connected to the first end of the second indicator light, and the third end is connected to the second power supply terminal DGND;

[0204] A first end of the twentieth resistor R20 is connected to the second power supply 3V3, and a second end thereof is connected to the second end of the second indicator light.

[0205] like Fig. 9 As shown, the power supply of the indicator light module is Figure 3 IC2 provides 3V3. When the UWB positioning module works normally, TXLED and EXLED generate a periodic pulse signal. When the level is high, Q2 and Q3 (S8050) are turned on, and the indicator light is on normally. When the level is low, the indicator light is off and flashes according to the pulse period.

[0206] like Fig.10 and Fig.11 As shown in the figure, the core components of the UWB positioning module are DW1000 and STM32F103C8T6. The power supply of the two chips is Figure 33V3 provided by IC2. This module is a highly integrated full-function UWB positioning module, which adopts the industry's mainstream Decawave DW1000 chip solution, and integrates STM32MCU, PALNA, IMU, pressure sensor, etc. in a limited space. It can quickly develop a high-precision positioning system based on the module, greatly reducing the complexity of UWB communication and positioning ranging.

[0207] The DW1000 chip of the first UWB positioning module is a CMOS-based, low-power wireless transceiver integrated circuit that complies with the UWB standard chip in the 802.15.4-2011 protocol. It supports 6 RF bands from 3.5GHz to 6.5GHz, with a power supply voltage of 2.8V to 3.6V, a current of 1uA in SLEEP mode, and a current of 50nA in DEEP SLEEP mode. It also supports precise positioning and data transmission, with a positioning accuracy of 10 cm. The UWB positioning module includes an antenna, a wireless communication module, an MCU, a pressure sensor, and other related circuits, providing a complete hardware design solution. The module includes an on-board 38.4MHZ reference crystal oscillator. By embedding the crystal oscillator into the product, the initialization frequency error can be reduced to about one millionth.

[0208] The MCU of the second UWB positioning module uses STM32F103C8T6, which is a 32-bit microcontroller based on the ARM Cortex-M core STM32 series. The program memory capacity is 64KB, the voltage required is 2V~3.6V, and the operating temperature is -40℃~+85℃. The Cortex-M4 core has a single-precision floating-point operation unit (FPU) that supports all Arm single-precision data processing instructions and data types. It also implements a complete set of DSP instructions and a memory protection unit (MPU) to enhance application security.

[0209] In a specific embodiment, a mine intrinsically safe identification card search instrument, its main technical parameters include:

[0210] 1. Power supply

[0211] a) Rated operating voltage: 7.4V DC

[0212] b) Operating voltage range: 6.4V~8.4V

[0213] c) Working current: ≤400mA

[0214] d) Standby current: ≤100mA

[0215] 2. The number of concurrent identifications of the search device and identification cards is greater than or equal to 80.

[0216] 3. Wireless parameters between the search instrument and the identification card

[0217] a)Signal type: UWB

[0218] b) Operating frequency range: (3.5~4.5) GHz

[0219] c) Transmitting power: ≤10dBm (including antenna gain)

[0220] d) Receiving sensitivity: -75dBm

[0221] e) Maximum identification distance from identification card: 300m (open space without obstruction)

[0222] 4. Standby time: not less than 8h.

[0223] 5. Main functions

[0224] a) The search instrument has the function of receiving the wireless coding of the identification card.

[0225] b) The search instrument has LCD display and touch screen operation functions.

[0226] c) The search instrument has the function of data storage.

[0227] d) The search instrument has a time stamping function.

[0228] e) The search instrument has the function of displaying identification cards

[0229] f) The search instrument has a battery low voltage prompt function.

[0230] 6. The power supply uses 4 PL115565 / 3000mAh / 3.7 lithium manganese oxide lithium-ion batteries, which are connected in series, and a 2-level current limiting protection board is connected in series. They are encapsulated in the battery box to form an intrinsically safe battery assembly Uo: 8.40V, Io: 1.0A. The safety performance of the lithium battery complies with the relevant provisions of MT / 1051-2007; the clock circuit is powered by 1 CR1220 / 40mAh lithium manganese dioxide button battery, Uo: 3.7V, Io: 100mA.

[0231] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0232] It should also be noted that, in the description of the present utility model, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0233] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in this field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A mine intrinsically safe identification card search instrument, characterized in that: include: case, The main control board, battery and UWB positioning module are set in the shell; the touch screen, switch button, antenna and charging aviation socket are set outside the shell; Among them, the UWB positioning module, the switch button, the touch display screen and the charging aviation socket are electrically connected to the main control board respectively; the antenna is electrically connected to the UWB positioning module; and the battery is connected to the charging aviation socket.

2. The search device according to claim 1, characterized in that: The housing comprises a bottom shell and a plurality of cover plates, and the plurality of cover plates are fixed by bolts; The side of the shell is provided with a charging aviation socket slot and a connection buckle; The housing is internally provided with a touch display screen mounting plate, a main control board mounting plate, an antenna mounting plate, a UWB positioning module mounting plate and a battery box.

3. The search device according to claim 1, characterized in that: The housing is also provided with a first UWB radio frequency interface and a second UWB radio frequency interface, which are respectively provided on two opposite sides of the housing.

4. The search device according to claim 3, characterized in that: The UWB positioning module includes a first UWB positioning module and a second UWB positioning module, the first UWB positioning module is electrically connected to the first UWB radio frequency interface, and the second UWB positioning module is electrically connected to the second UWB radio frequency interface.

5. The search device according to claim 1, characterized in that: The shell is also provided with an indicator light module, and the indicator light module is electrically connected to the main control board.

6. The search device according to claim 5, characterized in that: The indicator light module includes two indicator lights, and the indicator lights and the touch display screen are arranged on the same side of the housing.

7. The search device according to claim 5, characterized in that: The indicator light module is used to display the working status of the UWB positioning module.

8. The search device according to claim 1, characterized in that: The search instrument also includes a power supply circuit arranged in the shell, and the battery supplies power to the main control board, the UWB positioning module, the touch display screen and the indicator light module through the power supply circuit.

9. The search device according to claim 1, characterized in that: The main control board is used to process the carrier signal received by the antenna from the identification card, and send the processed data to the touch screen for display; The touch display screen is used to display the working status of the search instrument in real time.

10. The search device according to claim 9, characterized in that: The search instrument further includes a reset circuit, a storage interface circuit, an atmospheric pressure sensor circuit and a clock circuit which are arranged in the housing and are electrically connected to the main control board respectively; The storage interface circuit is used to transfer the internal data of the search instrument to the external device; The clock circuit is used to cooperate with the main control board to send control signals.

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