CN1971646A - Intrinsically safe type monitoring alarming system of underground power supply used for mine - Google Patents

Abstract

The invention discloses an intrinsically safe mining underground power supply monitoring and alarm system, which includes an intrinsically safe power supply circuit, a main control circuit, a photoelectric isolation circuit, an alarm display circuit, a keyboard, a real-time clock, a memory, a communication circuit, a photoelectric isolator, and a relay , alarm, the processor of the main control circuit is respectively connected with the output terminal of the photoelectric isolation circuit, the alarm display circuit, the keyboard, the real-time clock, the memory, the communication circuit, the input terminal of the photoelectric isolator, and the input terminal of the photoelectric isolation circuit is connected Switching value, the output terminal of the photoelectric isolator is connected to the input terminal of the relay, and the output terminal of the relay is connected to the alarm. The invention has the characteristics of high performance, high intelligence, high reliability, good man-machine interface, etc., and realizes the practical purpose of multi-channel, high precision, and convenient and quick operation. It can be widely used in the monitoring and control of power supply in coal mines containing methane gas and having explosive hazards.

Description

Intrinsically Safe Mine Underground Power Supply Monitoring and Alarm System

technical field

The invention relates to an alarm device, in particular to a high-reliability, high-intelligence intrinsically safe underground power supply monitoring and alarm system for mines.

Background technique

With the rapid development of coal, petroleum, chemical and other industries, coal production has become one of the most important industries in my country's production field, and its importance has become more prominent in today's world where underground resources are increasingly scarce. However, because coal mine production is mainly underground operations, and the geological conditions of coal mines are complex and changeable, they are often threatened by disasters such as gas, water, fire, coal dust, and roofs. In addition, the level of technical equipment is relatively backward, and the quality of the workforce is generally not high. The weak awareness of safety management has led to coal mines being the industry with the largest number of accidents and casualties among Chinese industrial and mining enterprises. Accidents occur frequently, making the safety production situation more severe. Therefore, how to ensure the normal operation of the underground power supply system and how to deal with it in a timely and effective manner when a fault occurs has become the most important task for mine safety production.

Contents of the invention

In order to solve the safety problem of existing mine electricity use, the present invention provides an intrinsically safe mine underground power supply monitoring and alarm system with simple structure and high reliability.

The technical solution of the present invention is: including intrinsically safe power supply circuit, main control circuit, photoelectric isolation circuit, alarm display circuit, keyboard, real-time clock, memory, communication circuit, photoelectric isolator, relay, alarm, it is characterized in that: The processor of the main control circuit is respectively connected with the output terminal of the photoelectric isolation circuit, the alarm display circuit, the keyboard, the real-time clock, the memory, the communication circuit, and the input terminal of the photoelectric isolator. The output end of the relay is connected to the input end of the relay, and the output end of the relay is connected to the alarm.

In the above intrinsically safe mine underground power supply monitoring and alarm system, the communication circuit is an RS232 or RS485 circuit.

In the above-mentioned intrinsically safe mine underground power supply monitoring and alarm system, the alarm includes a rectifier bridge, a DC voltage stabilization module, a set-base coupled multivibrator, an alarm lamp, and an electric whistle. The AC input circuit of the rectifier bridge is connected in series with the relay control switch contacts, the output terminal of the rectifier bridge is connected with the DC voltage stabilizing module, the output terminal of the DC voltage stabilizing module is connected with the power supply terminal of the set-base coupling multivibrator, and the alarm lamp is connected in series In the collector circuit of the set-base coupled multivibrator, the electric horn is connected in series with the amplifier and then connected with a DC voltage stabilizing module.

Advantages of the present invention: the input end of the photoelectric isolation circuit of the present invention can be connected to 16 switching quantities, and the alarm of each switching quantity can be input or withdrawn separately, and 16 monitoring points can be controlled separately, and the power supply of 16 circuits can be realized at the same time. Electric siren alarm and light alarm functions, thereby solving the problem of limited collection lines in domestic similar products, and can fully meet the actual needs of current power supply circuit alarms in coal mines; the processor of the main control circuit of the present invention adopts the American MCS51 series ATmega32L type The 8-bit AVR high-performance, low-power microprocessor chip with 32KB in-system programmable Flash has achieved the goals of high precision, high performance, high reliability, high intelligence, and programmable, which greatly reduces the components of circuit devices , thereby greatly reducing the complexity of the system and improving the overall performance of the system; the alarm display circuit part of the present invention uses a Chinese character liquid crystal display, and the user can complete parameter setting, clock modification, Alarm information query and other functions greatly improve the visibility of the system, and the man-machine interface is very friendly. The alarm device of the invention has sound and light alarm, and works only when an alarm occurs, which greatly reduces the energy consumption of the system.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a structural principle block diagram of the present invention.

Fig. 2 is a structural diagram of the alarm device in the present invention.

Fig. 3 is a circuit diagram of the present invention.

Fig. 4 is a flow chart of the data processing module.

specific implementation plan

Referring to Fig. 1, Fig. 1 is a functional block diagram of the present invention, and the present invention comprises intrinsically safe power supply circuit, main control circuit, photoelectric isolation circuit, alarm display circuit, keyboard, real-time clock circuit, memory, communication circuit, photoelectric isolator, relay, Alarm system. The input terminal of the photoelectric isolation circuit can be connected to 16 channels of alarm switches. After being processed by the processor of the main control circuit, it is sent to the alarm display circuit for display. Action to control the alarm for sound and light alarm.

Referring to Fig. 2, Fig. 2 is the structural diagram of alarm device among the present invention, and described alarm device comprises rectifier bridge, direct current voltage stabilizing module, set-base coupling multivibrator, alarm lamp, electric whistle, the AC input circuit string of rectifier bridge Connect to the relay JK control switch contact, the output terminal of the rectifier bridge is connected to the input terminal of the DC voltage stabilizing module, the output terminal of the DC voltage stabilizing module is connected to the power supply terminal of the set-base coupled multivibrator, and the alarm light is connected in series to the set-base In the collector circuit of the coupled multivibrator, the electric whistle is connected in series with the amplifier and then connected with a DC voltage stabilizing module.

Referring to FIG. 3 , FIG. 3 is a schematic diagram of an intrinsically safe power supply circuit and an alarm control circuit in the present invention. The input of the intrinsically safe power supply circuit adopts AC 127V, which is divided into two outputs after being stepped down by the intrinsically safe transformer FB: one output +5V DC voltage is output to the alarm display circuit through the intrinsically safe circuit; the other output +12V DC voltage is output through the intrinsically safe Line output to the main control circuit. Among them, the cables for the intrinsically safe circuits are all made of national standard blue copper wires, and the words "ib" are marked with blue paint next to the terminals of the binding posts. Among them, the intrinsically safe 5V and 12V do not share the same ground, and the intrinsically safe coil contacts can withstand at least the AC rating. 1500V withstand voltage, test for 1 minute without breakdown or flashover.

Among the present invention, the microprocessor of main controller adopts the ATmega32L processor that adopts MCS51 series, and ATmega32 microprocessor has following characteristics: programmable Flash in the system of 32K byte, 1024 byte EEPROM, 2K byte SRAM, 32 General-purpose I/O lines, 32 general-purpose working registers, JTAG interface for boundary scan, support on-chip debugging and programming, three flexible timer/counters (T/C) with compare mode, on-chip/external Interrupt, programmable serial USART, byte-oriented two-wire serial interface, 8-way 10-bit ADC with selectable differential input stage programmable gain (TQFP package), programmable watchdog timing with on-chip oscillator device, an SPI serial port, and six software-selectable power-saving modes. When working in idle mode, the CPU stops working, while USART, two-wire interface, A/D converter, SRAM, T/C, SPI port and interrupt system continue to work; in power-down mode, the crystal oscillator stops oscillating, and all functions except interrupt Stop working except for hardware reset; in power-saving mode, the asynchronous timer continues to run, allowing the user to maintain a time base, while the rest of the functional modules are in a dormant state; when the ADC noise suppression mode terminates the CPU and except for the asynchronous timer and ADC All other I/O modules work to reduce switching noise during ADC conversion; in Standby mode, only the crystal or resonant oscillator is running, and the rest of the functional modules are in a sleep state, so that the device consumes very little current and has fast startup capability ; Extended Standby mode allows the oscillator and asynchronous timer to continue to work.

The reason why the present invention carefully selects the ATmega32L microprocessor chip as the controller chip is precisely because it contains all resources needed for microcomputer protection such as Flash ROM, RAM, EEPROM, AD converter, timer, and serial port, so that the whole system The required components are greatly reduced, and at the same time, the overall performance and intelligence of the system are greatly improved.

Accompanying drawing 4 is the flow chart of data processing module, and it is mainly made up of six sub-modules of system initialization (ie basic parameter setting), data acquisition, logic discrimination, relay output, man-machine interface, self-inspection, communication. The system initialization sub-module is to provide basic parameter presets for the operation of this data processing module. When the data acquisition sub-module collects data, the logic discrimination sub-module analyzes the collected data and compares it with the original parameters in the system before making Once it is judged that there is a fault signal, the relay sub-module will take corresponding actions, send out an alarm signal, and transmit the fault data to the Chinese character liquid crystal display through the communication sub-module, so that the user can understand the fault situation, and at the same time, the user can also Fault information can be queried by operating the keyboard on the control panel.

Claims (3)

1. An intrinsically safe mining underground power supply monitoring and alarm system, including an intrinsically safe power supply circuit, a main control circuit, a photoelectric isolation circuit, an alarm display circuit, a keyboard, a real-time clock, a memory, a communication circuit, a photoelectric isolator, a relay, and an alarm It is characterized in that: the intrinsically safe power supply circuit input adopts AC 127V, and is divided into two outputs after being stepped down by the intrinsically safe transformer FB: one output +5V DC voltage, which is output to the alarm display circuit through the intrinsically safe line; the other output +12V The DC voltage is output to the main control circuit through the intrinsically safe circuit, and the processor of the main control circuit is respectively connected to the output terminal of the photoelectric isolation circuit, the alarm display circuit, the keyboard, the real-time clock, the memory, the communication circuit, and the input terminal of the photoelectric isolator The input terminal of the photoelectric isolation circuit is connected to the switching value, the output terminal of the photoelectric isolator is connected to the input terminal of the relay, and the output terminal of the relay is connected to the alarm. 2. The intrinsically safe mine underground power supply monitoring and alarm system according to claim 1, wherein the communication circuit is an RS232 or RS485 circuit. 3. The intrinsically safe mining underground power supply monitoring and alarm system according to claim 1, characterized in that: the alarm includes a rectifier bridge, a DC voltage stabilization module, a set-base coupled multivibrator, an alarm lamp, and an electric whistle , the AC input circuit of the rectifier bridge is connected in series with the relay control switch contacts, the output of the rectifier bridge is connected to the input of the DC voltage stabilization module, the output end of the DC voltage stabilization module is connected to the power supply end of the set-base coupled multivibrator, and the alarm light It is connected in series in the collector circuit of the set-base coupled multivibrator, and the electric whistle is connected in series with the amplifier and then connected to a DC power supply.

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