Mining ring network communication interface working state monitoring device

Abstract

The utility model discloses a mining ring network communication interface working state monitoring device which comprises a master control module, a voltage monitoring reset module, an AC / DC detection module, an ADC voltage detection module, an AD reference circuit and a temperature detection module. The voltage monitoring reset module is connected with the main control module, and the voltage monitoring reset module is used for resetting and restarting the main control module when the working voltage of the main control module is abnormal; and the AC / DC detection module is connected with the main control module and is used for detecting whether the mining ring network communication interface is in an external AC power supply state or an internal battery power supply state. The utility model provides a working state monitoring device for a mining ring network communication interface, which is used for accurately monitoring the voltage, the AC / DC power supply state, the battery electric quantity and the working temperature of the mining ring network communication interface in real time and ensuring the safe operation of the mining ring network communication interface.

Description

Technical Field

[0001] The utility model relates to a working state monitoring device for a mine-used ring network communication interface. Background Art

[0002] At present, with the rapid development of information technology, coal mine monitoring technology is also constantly updated and upgraded, including the widely used safety monitoring communication technology. In the traditional monitoring field, the equipment standards are complex and incompatible with each other, which cannot well realize the integrated communication construction of mine-used equipment and affects the production efficiency of coal mine enterprises. Therefore, the ring network communication interface came into being. Each ring network communication interface usually consists of components such as a network switch, a signal converter, a power supply board, a communication interface board, and a battery. The communication equipment in the coal mine underground needs the battery as a backup power supply. Then, multiple ring network communication interfaces are combined into a communication ring network through optical fibers to realize the ring network communication between the ground and the underground.

[0003] However, due to the harsh environment in the coal mine underground, during the long-term use, it will cause the ring network communication interface to malfunction, resulting in poor communication and affecting the safe production of the coal mine. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a working state monitoring device for a mine-used ring network communication interface, which can accurately monitor the voltage, AC / DC power supply state, battery power, and working temperature of the mine-used ring network communication interface in real time to ensure the safe operation of the mine-used ring network communication interface.

[0005] To solve the above technical problems, the technical solution of the utility model is as follows:

[0006] A working state monitoring device for a mine-used ring network communication interface, which includes a main control module, a voltage monitoring and reset module, an AC / DC detection module, an ADC voltage detection module, an AD reference circuit, and a temperature detection module;

[0007] The voltage monitoring and reset module is connected to the main control module, and the voltage monitoring and reset module is used to reset and restart the main control module when the working voltage of the main control module is abnormal;

[0008] The AC / DC detection module is connected to the main control module, and the AC / DC detection module is used to detect whether the mine-used ring network communication interface is in the external AC power supply state or the internal battery power supply state;

[0009] The ADC voltage detection module is connected to the main control module, and the ADC voltage detection module is used to detect the real-time voltage of the internal battery;

[0010] The AD reference circuit is connected to the main control module, and the AD reference circuit is used to calibrate the ADC sampling voltage of the main control module;

[0011] The temperature detection module is connected to the main control module, and the temperature detection module is used to detect the working temperature inside the mine-used ring network communication interface.

[0012] Furthermore, an Ethernet communication module is further included. One end of the Ethernet communication module is connected to the main control module, and the other end of the Ethernet communication module is connected to the upper computer.

[0013] Furthermore, a display module is further included, and the display module is connected to the main control module.

[0014] Furthermore, an infrared remote control module is further included, and the infrared remote control module is connected to the main control module.

[0015] Furthermore, an intrinsically safe power supply module is further included, and the intrinsically safe power supply module is used to supply power to each module inside the working state monitoring device of the mine-used ring network communication interface.

[0016] Furthermore, the main control module includes an MCU chip, and the model of the MCU chip is LPC1778.

[0017] By adopting the above technical solutions, the present utility model has the following beneficial effects:

[0018] The present utility model uses a voltage monitoring and reset module to reset and restart the main control module when the working voltage of the main control module is abnormal, uses an AC / DC detection module to detect whether the mine-used ring network communication interface is in an external AC power supply state or an internal battery power supply state, uses the ADC voltage detection module to detect the real-time voltage of the internal battery, uses an AD reference circuit to calibrate the ADC sampling voltage of the main control module, and the temperature detection module is used to detect the working temperature inside the mine-used ring network communication interface. Finally, the main control module performs better data acquisition and backup, processes and analyzes the on-site situation, gives real-time alarms and uploads them, and monitors the voltage, AC / DC power supply state, battery power, and working temperature of the mine-used ring network communication interface in real time and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a principle block diagram of the working state monitoring device of the mine-used ring network communication interface of the present utility model;

[0020] Figure 2 It is a circuit schematic diagram of the intrinsically safe power supply module of the present utility model;

[0021] Figure 3 It is a circuit schematic diagram of the main control module of the present utility model;

[0022] Figure 4 It is the circuit schematic diagram of the voltage monitoring and reset module of the present utility model;

[0023] Figure 5 It is the circuit schematic diagram of the debugging interface of the present utility model;

[0024] Figure 6 It is the FLASH storage circuit schematic diagram of the main control module of the present utility model;

[0025] Figure 7 It is the circuit schematic diagram of the AD reference circuit of the present utility model;

[0026] Figure 8 It is the circuit schematic diagram of the ADC voltage detection module of the present utility model;

[0027] Figure 9 It is the circuit schematic diagram of the temperature detection module of the present utility model;

[0028] Figure 10 It is the circuit schematic diagram of the infrared remote control module of the present utility model;

[0029] Figure 11 It is the circuit schematic diagram of the display module of the present utility model;

[0030] Figure 12 It is the circuit schematic diagram of the Ethernet communication module of the present utility model. Specific embodiments

[0031] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments and in conjunction with the drawings.

[0032] As Figure 1 shown, this embodiment provides a working state monitoring device for a mine-used ring network communication interface, which includes a main control module, a voltage monitoring and reset module, an AC / DC detection module, an ADC voltage detection module, an AD reference circuit, a temperature detection module, an Ethernet communication module, a display module, an infrared remote control module, and an intrinsically safe power supply module.

[0033] As Figure 3As shown in the figure, the main control module of this embodiment includes an MCU chip U6, with the model number LPC1778. It establishes Ethernet communication with the host computer through the Ethernet communication module, uploads parameters such as the working temperature, voltage, AC / DC status, etc. collected by the monitoring device, and monitors and ensures the normal operation of the mine-used ring network communication interface. In the circuit, Y1 is the RTC clock input crystal oscillator of the chip, which is used for stable timing of the system time. Y2 is the system operating clock of the chip, which is used for the normal operation of the program. With the internal frequency doubling of the LPC1778 chip, the system clock can be increased to 75M. The capacitors C56 - C61 in the circuit are the filtering capacitors of the system, which improve the stability of the MCU circuit. The resistors R55 and R57 are current-limiting resistors, which convert the AC / DC voltage status into voltage parameters and input them into the MCU chip U6. LED2, LED3, and LED4 are the indicator lights of the system, which are used to indicate the current operating status. Figure 6 is the schematic diagram of the FLASH storage circuit, as Figure 5 As shown in the figure, the debugging interface circuit is designed according to the international standard test protocol. Its main functions are: 1. Download, download software to the FLASH of the MCU chip U6 through the JTAG tool. 2. Debug, run the internal program of the MCU chip U6 with the help of the JTAG tool in the development environment. 3. Boundary scan, can access the internal signal logic status of the MCU chip U6, the status of the pins of the MCU chip U6, etc.

[0034] As Figure 1 As shown in the figure, the voltage monitoring and reset module of this embodiment is connected to the main control module. The voltage monitoring and reset module is used to reset and restart the main control module when the working voltage of the main control module is abnormal. As Figure 4 As shown in the figure, a system monitoring voltage reset chip U2 with a watchdog and manual reset, model number CAT823TTDI-G, is adopted. When the voltage at the RESET network label position is not the normal operating voltage of 3.3V, it triggers the RESET pin of the reset chip U2, outputs a low-level signal, and the display module, Ethernet communication module, and main control module connected to this network label will all be reset and restarted, avoiding errors in the program running logic, improving the anti-interference ability of the system, and enhancing the robustness of the device.

[0035] As Figure 1 As shown in the figure, the AC / DC detection module of this embodiment is connected to the main control module. The AC / DC detection module is used to detect whether the mine-used ring network communication interface is in the external AC power supply state or the internal battery power supply state. As Figure 8 As shown in the figure, JZ is the AC / DC detection signal. JZ is output to pin 63 of the MCU chip U6. When JZ is at a high level, it indicates battery power supply, and when JZ is at a low level, it indicates external AC power supply.

[0036] As Figure 1As shown, the ADC voltage detection module of this embodiment is connected to the main control module. The ADC voltage detection module is used to detect the real-time voltage of the internal battery. As Figure 8 As shown, the ADC voltage detection module includes an input power supply passing through a TVS, a common-mode inductor, a magnetic bead, a varistor, etc., which plays an EMC anti-interference role for the monitoring device. P4 is a wiring terminal block, which is connected to the power supply board of the mine-used ring network communication interface through a cable. The network label BAT IN in the circuit is the real-time voltage of the battery collected by the device. It is divided by the voltage-dividing resistors R16 and R37 and then input to the ADC pin of the MCU chip U6. The network label CTR is the output control pin. When the real-time voltage of the battery exceeds 27V, it means that the battery is fully charged. At this time, the charging operation of the power supply board of the mine-used ring network communication interface is disconnected. When the external AC power supply fails and the battery starts to supply power, if the real-time voltage of the battery is detected to be lower than 22V, it means that the battery is about to be over-discharged, and the battery discharge is terminated. D20 is a Schottky diode 1N5819 for circuit filtering, and the one-way conductivity of the diode is used to prevent abnormal operation of the external circuit caused by incorrect output of the MCU chip U6. D21 is a zener diode to enhance the anti-interference of the circuit and prevent the main control chip from being burned out due to abnormal external input voltage.

[0037] As Figure 1 As shown, the AD reference circuit of this embodiment is connected to the main control module. The AD reference circuit is used to calibrate the ADC sampling voltage of the main control module. As Figure 7 As shown, the AD reference circuit uses a voltage reference chip U20, model LM336-2.5, which has advantages such as low temperature coefficient and a wide operating current of 400μA to 10mA. The MCU chip U6 is connected to the AD reference circuit through the AD reference pin to calibrate the input voltage. The ADC pin accuracy of the MCU chip U6 is 12 bits. If the maximum digital signal collected is 4096 and the reference voltage is 2.5V, if 2048 is collected, the sampled object voltage is 1.25V. If the reference voltage of the AD reference circuit is not connected and the internal reference power supply of the MCU chip U6 is used instead, it will result in low acquisition accuracy. By using the AD reference circuit, the ADC acquisition accuracy of the MCU chip U6 is improved, and the influence of the ambient temperature on the analog power supply part of the chip is prevented from causing insufficient acquisition voltage accuracy. To the greatest extent, the influence of extreme situations such as high temperature and low temperature in the mine on the acquisition accuracy of the monitoring device is avoided, and the applicable range of the device is improved.

[0038] As Figure 1 As shown, the temperature detection module of this embodiment is connected to the main control module. The temperature detection module is used to detect the internal operating temperature of the mine-used ring network communication interface. As Figure 9As shown in the figure, the temperature detection module is designed using the temperature sensor DS18B20. Taking advantage of the single-bus feature, it saves the hardware connection of the main control, improves the hardware stability. In the circuit, the resistor R82 is a current-limiting resistor to ensure the normal operation of the temperature sensor, and the resistor R85 is a pull-up resistor to improve the communication stability. It continuously monitors the working temperature inside the communication interface of the mine-used ring network to prevent failures caused by overheating.

[0039] As Figure 1 shown, one end of the Ethernet communication module in this embodiment is connected to the main control module, and the other end is connected to the host computer. As Figure 12 shown, the Ethernet communication module uses a single Ethernet physical layer transceiver PHY chip IC1, model LAN8720A, which cooperates with the RMII interface pins of the MCU chip U6 to achieve fast communication with other devices such as the host computer and sub-stations. The chip has a small package and a high degree of integration, making it adaptable to more micro application scenarios. The Ethernet signal output by the chip IC1 is externally connected through an RJ45 socket. In the circuit, the resistors R12 - R15 are pull-up resistors to increase the signal strength, and the resistors R17, R18, R20, R23, R31 are termination matching resistors to improve the stability of the Ethernet signal during high-speed communication.

[0040] As Figure 1 shown, the display module in this embodiment is connected to the main control module. As Figure 11 shown, the display module uses a liquid crystal display screen and a liquid crystal display circuit. The liquid crystal display circuit adopts a parallel transmission method to maximize the communication speed, rationally utilize the hardware resources of the single-chip microcomputer, improve the screen refresh rate, and enhance the user experience. C2 is a 100nF capacitor used for filtering the power supply of the display screen.

[0041] As Figure 1 shown, the infrared remote control module in this embodiment is connected to the main control module. As Figure 10 shown, the infrared remote control module uses an HS0038B infrared receiver head, which integrates a photodetector and a preamplifier, saving circuit design resources and improving the product cost performance. When in use, parameters such as the IP address of the monitoring device can be set through the remote control.

[0042] As Figure 1 shown, the intrinsically safe power supply module in this embodiment is used to supply power to each module inside the working state monitoring device of the mine-used ring network communication interface. As Figure 2As shown in the figure, U11 of the intrinsically safe power supply module circuit is a voltage regulator of the LM2674 series, a monolithic integrated circuit manufactured using LMDMOS technology. It supports wide voltage input, with a voltage range of 8V to 40V and a continuous output current of up to 5A. The line regulation and transient response are improved through input voltage feedforward, and the system is protected by overcurrent limit, overvoltage protection, and thermal shutdown. The circuit uses diode D5 for current commutation to ensure smooth current, and in case of overcurrent, it can prevent the subsequent circuit from burning out and avoid losses. The circuit is designed to output 5V for use by devices such as the rear-end liquid crystal display, and also serves as the input for 3.3V power supply. The circuit design uses two TVS diodes D6 and D7 to maximize the protection of the rear end. When there are large voltage and current faults in the front stage, they conduct quickly to protect important devices such as the rear-end main control chip. U12 is a 5V to 3.3V voltage regulator, which supplies power to devices such as the MCU chip U6 and its peripheral circuits. EC1 and EC2 in the circuit are 22uF and 47uF tantalum capacitors, which are used to filter out low-frequency interference. C40, C41, C42, and C43 are 100nF capacitors, which are used to filter out high-frequency interference, ensuring the power quality of the system and improving the anti-interference ability of the device.

[0043] In the specific embodiments described above, the technical problems solved, technical solutions, and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mining ring network communication interface working status monitoring device, characterized in that: It includes a main control module, a voltage monitoring and reset module, an AC / DC detection module, an ADC voltage detection module, an AD reference circuit, and a temperature detection module; The voltage monitoring and reset module is connected to the main control module, and is used to reset and restart the main control module when the working voltage of the main control module is abnormal; The AC / DC detection module is connected to the main control module, and the AC / DC detection module is used to detect whether the mining ring network communication interface is in an external AC power supply state or an internal battery power supply state; The ADC voltage detection module is connected to the main control module, and the ADC voltage detection module is used to detect the real-time voltage of the internal battery; The AD reference circuit is connected to the main control module, and the AD reference circuit is used to calibrate the ADC sampling voltage of the main control module; The temperature detection module is connected to the main control module, and the temperature detection module is used to detect the working temperature inside the mining ring network communication interface.

2. The working status monitoring device of the ring network communication interface for mining according to claim 1 is characterized in that: It also includes an Ethernet communication module, one end of which is connected to the main control module, and the other end of which is connected to the host computer.

3. The working status monitoring device of the ring network communication interface for mining according to claim 1 is characterized in that: It also includes a display module, which is connected to the main control module.

4. The working status monitoring device of the ring network communication interface for mining according to claim 1 is characterized in that: It also includes an infrared remote control module, which is connected to the main control module.

5. The working status monitoring device of the ring network communication interface for mining according to claim 1 is characterized in that: It also includes an intrinsically safe power supply module, which is used to supply power to various modules in the mining ring network communication interface working status monitoring device.

6. The working status monitoring device of the ring network communication interface for mining according to claim 1 is characterized in that: The main control module includes an MCU chip, and the model of the MCU chip is LPC1778.

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