CN101078680A

CN101078680A - Coal mine gas density real-time monitoring alarming control system

Info

Publication number: CN101078680A
Application number: CN 200610016871
Authority: CN
Inventors: 于宏柱; 王长庚
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2006-05-25
Filing date: 2006-05-25
Publication date: 2007-11-28

Abstract

The invention relates to an on-line monitoring alarming control system for mine gas concentration, belonging to the electronic measurement and control technology field. The solving technology problem is that an on-line monitoring alarming control system for mine gas concentration is provided. The solving technology project comprises photosensitive sensor, low-pass filtering amplifier, keyboard, sound-light alarming equipment, digital code display, SCM and control program, temperature sensor and regulated power supply. The photosensitive sensor is connected with the regulated power supply by wire. It outputting end is connected with the inputting end of low-pass filtering amplifier. The outputting end of low-pass filtering amplifier is connected with the inputting end of SCM. The keyboard is connected with IO ports of SCM. Sound-light alarming equipment and digital code display are connected with SCM respectively. The control program is set in the memory of SCM. The SCM is connected with the regulated power supply by wire. The temperature sensor is connected with the regulated power supply by wire. Its outputting end is connected with the inputting end of SCM. The system is provided with simple structure, low power consumption and on-line monitoring and alarming.

Description

A kind of coal mine gas density real-time monitoring alarming control system

One, technical field

The invention belongs to a kind of coal mine gas concentration monitor and alarm system that relates in the electronic measurement and control technical field.

Two, technical background

The safety problem of colliery underground work always is the problem that state security department and colliery unit attach great importance to, and the fire damp gas concentration too high be the one of the main reasons that causes coal mining accident.Whether so how can detect the methane gas concentration of down-hole anywhere or anytime exceed standard, be to reduce the key point that coal mining accident takes place.

To the detection of coal-mine gas gas concentration, adopt sensitive detection parts usually before the present invention, methane gas concentration is detected the methane gas sensitivity.This sensitive detection parts can only be surveyed qualitatively, precision is lower; Also have the detection instrument made from principle of optical interference,, change out the concentration of methane gas through position measurement to interference fringe.These equipment all do not have the electronics part, partly are made up of optical-mechanical fully.Directly moving with graticule of interference fringe compared by human eye, conversed corresponding methane gas concentration, can't accomplish real-time control measurement methane gas concentration.

Along with the high speed development of large scale integrated circuit and single-chip microcomputer, the electronic monitoring instrument has successively appearred, and feasible real-time monitoring to the coal mine gas gas concentration becomes a reality.

The prior art the most approaching with the present invention is that number of patent application is 99246281.9 single-chip microcomputer methane alarm mine lamp.As shown in Figure 1: comprise light sensor 1, low-pass filter amplifier 2, power amplifier 3, audible-visual annunciator 4, stabilized voltage supply 5, adjustable potentiometer 6.Stabilized voltage supply 5 is system's power supply, adjustable potentiometer 6 is used for setting the gas concentration of warning, the magnitude of voltage that the electric signal of the methane gas concentration change that sensor 1 produces and adjustable potentiometer 6 produce is imported low-pass filter amplifier 2 in the mode of difference and is amplified, when concentration change is very big, low-pass filter amplifier 2 is output as high level, after amplifying through power amplifier 3 again, drive audible-visual annunciator 4 and send actuation of an alarm.This system adopts big, the display density in real time of discrete component power consumption.

Three, summary of the invention

In order to overcome the defective that prior art exists, the objective of the invention is to show in real time methane gas concentration and can report to the police a kind of real-time display alarm supervisory system of ad hoc meter.

The technical problem to be solved in the present invention is: a kind of coal mine gas density real-time monitoring alarming control system is provided.The technical scheme of technical solution problem is as shown in Figure 2: comprise light sensor 7, low-pass filter amplifier 8, keyboard 9, audible-visual annunciator 10, nixie display 11, Single-chip Controlling program 12, single-chip microcomputer 13, temperature sensor 14, stabilized voltage supply 15.

Stabilized voltage supply 15 is the power supply of total system, provides system works to guarantee.Light sensor 7 is connected with stabilized voltage supply 15 by lead, and the output terminal of light sensor 7 is connected with the input end of low-pass filter amplifier 8, and the output terminal of low-pass filter amplifier 8 is wired to the input end of single-chip microcomputer 13.Keyboard 9 has lead to be connected with the IO port of single-chip microcomputer 13, audible-visual annunciator 10 has lead to be connected with single-chip microcomputer 13 respectively with nixie display 11, Single-chip Controlling program 12 is loaded in the internal storage of single-chip microcomputer 13, single-chip microcomputer 13 has lead to be connected with stabilized voltage supply 15, temperature sensor 14 has lead to be connected with stabilized voltage supply 15, and the output terminal of temperature sensor 14 is connected with the input end of single-chip microcomputer 13.

Light sensor 7 receives the light signal that comprises the methane gas concentration change, change voltage signal into, during the methane gas concentration change, corresponding variation also can take place in the power of the light signal above the light sensor 7, the voltage signal values of conversion is also along with the variation that size takes place, this magnitude of voltage flows to low-pass filter amplifier 8 and nurses one's health and filtering, eliminates environmental noise and disturbs, and voltage signal is after treatment sent into the AD module in the single-chip microcomputer 13; Place near the temperature sensor 14 the light sensor 7, the environment temperature of the tested methane gas of real-time detection, the ambient temperature value that records is converted to voltage signal, and this voltage signal is sent into the AD module in the single-chip microcomputer 13; Single-chip microcomputer 13 is high integration single-chip microcomputers that comprise inner integrated AD module, internal clocking module, internal reset module etc.Under the control of Single-chip Controlling program 12, comprise gas density voltage signal that changes and the voltage signal that comprises temperature of importing the AD module are done analog to digital conversion, change analog quantity into digital quantity, with transformation result substitution specific formulation, obtain final measurement concentration value, IO port by single-chip microcomputer 13 sends to nixie display 11, demonstrates methane gas concentration value, ambient temperature value and working time respectively.Control by Single-chip Controlling program 12, monitor and alarm system was worked in low-power consumption standby state, parameter setting and digital the demonstration under the two states, no matter in which kind of duty, when surpassing warning concentration, methane gas concentration that can be in working environment reports to the police automatically, alarming value is provided with in the input of parameter setting and digital show state by keyboard 9 and finishes, and promptly alarm concentration value, the working time of triggering 12 pairs of systems of Single-chip Controlling programs by keyboard 9 makes amendment and be provided with and incident such as warning function test.Acoustic-optic alarm 10 drives by Single-chip Controlling program 12 control and by single-chip microcomputer 13, carries out when gas density exceeds standard that sound pipes and the actuation of an alarm of light flash.

Good effect of the present invention: this control system can make monitoring display alarm be operated in low-power consumption standby state, parameter setting and the digital two states that shows and work down, which kind of no matter report to the police automatically during at methane gas concentration over-standard that can be in working environment under the state, need not personnel operation measure, this system architecture is simple, low in energy consumption, guarantee that system can continuous working more than 24 hours, and practical value is strong.

Four, description of drawings

Fig. 1 is the system architecture diagram of prior art

Fig. 2 is a control system structured flowchart of the present invention

Fig. 3 is the circuit theory diagrams of Fig. 2

Fig. 4 is a main program flow chart of the present invention

Fig. 5 is a button interrupt routine process flow diagram of the present invention

Five, embodiment

The present invention implements by system architecture diagram shown in Figure 2.Wherein light sensor 7 adopts the CdS photoresistance; Low-pass filter amplifier 8 adopts the mcp604 of microchip; Keyboard 9 adopts the button film of pad pasting form; Single-chip microcomputer 13 adopts the New Type of Chip Microcomputer dspic30F2012 of microchip; It is the high-decibel hummer of HYDZ that audible-visual annunciator 10 adopts high brightness LED and label; Nixie display 11 adopts LED nixie display LG2841AH; Temperature sensor 14 adopts the TC1047A of microchip; Stabilized voltage supply 15 has adopted TC1185, the MCP1253 of microchip.

Claims

1, a kind of coal mine gas density real-time monitoring alarming control system, comprise light sensor, low-pass filter amplifier, audible-visual annunciator, stabilized voltage supply, it is characterized in that also comprising keyboard (9), nixie display (11), Single-chip Controlling program (12), single-chip microcomputer (13), temperature sensor (14); Light sensor (7) is connected with stabilized voltage supply (15) by lead, the output terminal of low-pass filter amplifier (8) is received the input end of single-chip microcomputer (13) by lead, keyboard (9) has lead to be connected with the IO port of single-chip microcomputer (13), audible-visual annunciator (10) has lead to be connected with single-chip microcomputer (13) respectively with nixie display (11), Single-chip Controlling program (12) is loaded in the internal storage of single-chip microcomputer (13), single-chip microcomputer (13) has lead to be connected with stabilized voltage supply (15), temperature sensor (14) has lead to be connected with stabilized voltage supply (15), and the output terminal of temperature sensor (14) is connected with the input end of single-chip microcomputer (13).