CN201886598U

CN201886598U - Combustible gas monitoring device

Info

Publication number: CN201886598U
Application number: CN2010206421980U
Authority: CN
Inventors: 林章阳; 黄志勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-06
Filing date: 2010-12-06
Publication date: 2011-06-29
Anticipated expiration: 2020-12-06

Abstract

The utility model relates to a combustible gas monitoring device, in which an MQ gas sensor is used for detecting concentration of the combustible gas, the MQ gas sensor is connected with a sampling resistor R1, the output of the sampling resistor R1 is connected with a resistor R2 and further input into an A/D (analogue/digital) conversion circuit U2, the output of the A/D conversion circuit U2 is connected with a signlechip control circuit U1, and the singlechip control circuit U1 provides three circuits for controlling the output, wherein the output signal of the first circuit singlechip control circuit U1 is input into a base electrode of a triode Q2 through a resistor R5, a collector electrode output of the triode Q2 is connected with a relay J1, and the relay J1 controls and drives a contactor KM; the output signal of the second circuit singlechip control circuit U1 controls and drives a speaker BYY through a current-limiting resistor R4; and the output signal of the third circuit singlechip control circuit U1 is input into a base electrode of a triode Q1 through a resistor R3, and a collector electrode output of the triode Q1 is connected with an FDD-5 emitting module IC2; so as to achieve the purpose of effective prevention and elimination of fire disasters.

Description

The inflammable gas supervising device

Technical field

The utility model relates to field of monitoring devices, particularly relates to a kind of inflammable gas supervising device.

Background technology

In the fire failure, the combustible gas leakage ratio has accounted for very most of, causes serious threat for people's the security of the lives and property, and traditional flammable gas alarm when detecting gas and reaching finite concentration, sends sound and light alarm or by there being the alignment main frame to report to the police.Inflammable gas is a kind of flammable explosive gas, and lta can spread rapidly when leaking as generation everywhere, causes person poisoning, burns and explodes.When the concentration of air reaches 25%, can cause human body anoxia and cause nervous system damage, can show respiratory paralysis, stupor even death when serious.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, but the inflammable gas supervising device that provides a kind of radio alarming, linkage relevant device to ventilate.

The technical scheme that the utility model adopted is such: a kind of inflammable gas supervising device, detect combustable gas concentration by the MQ gas sensor, the resistance of MQ gas sensor increases with the combustable gas concentration that is contacted and reduces, the MQ gas sensor connects sample resistance R1, after connecting resistance R 2, sample resistance R1 output is input to A/D change-over circuit U2, A/D change-over circuit U2 output is connected to single chip machine controlling circuit U1, divide three tunnel control outputs by single chip machine controlling circuit U1, the output signal of first via single chip machine controlling circuit U1 is input to the base stage of triode Q2 through resistance R 5, the collector output of triode Q2 connects relay J 1, relay J 1 controlling and driving contactor KM; The output signal of the second road single chip machine controlling circuit U1 is through current-limiting resistance R4 controlling and driving loudspeaker BYY; The output signal of Third Road single chip machine controlling circuit U1 is input to the base stage of triode Q1 through resistance R 3, and the collector output of triode Q1 connects FDD-5 transmitter module IC2.The electromagnetic wave of described FDD-5 transmitter module IC1 sends to JDD-5 receiver module IC1, and JDD-5 receiver module IC1 audio signal output end CPA output connects loudspeaker Y, and its CP/I/O data output end is through current-limiting resistance R6 control LED.

By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: when this device is gathered gas concentration, judge the concentration situation through the A/D data-switching, pass through Single-chip Controlling, the linkage driving relevant device ventilates, report to the police to main frame by wireless again, reach reliable in real time and report to the police, effectively take precautions against, remove the purpose of fire.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model.

Embodiment

Further specify the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, a kind of inflammable gas supervising device, detect combustable gas concentration by the MQ gas sensor, the resistance of MQ gas sensor increases with the combustable gas concentration that is contacted and reduces, characteristics such as that the MQ gas sensor has is highly sensitive, the response fast, recover rapidly, long-time stability are good, antijamming capability is strong, its profile is similar to the QM-N5 type.Civil power is through transformation, rectification, provide confession+5V direct supply to this device.In case MQ gas sensor MQ detects tested gas reach the finite concentration value after, MQ gas sensor MQ resistance value descends, sampling voltage on the sample resistance R1 raises, be input to A/D change-over circuit U2 the 2nd pin, after the inner A/D data-switching of A/D change-over circuit U2, by the 5th of A/D change-over circuit U2,6, the 35th of 7 pin and single chip machine controlling circuit U1,36,37 pin connect to form datel circuit, by single chip machine controlling circuit U1 read data information, after its inter-process, divide three tunnel outputs, the first via is by the 26th pin output low level of single chip machine controlling circuit U1, make triode Q2 conducting through resistance R 5, relay J 1 adhesive, normal open switch J1-1 closure promotes exhaust fan and ventilates; The control of secondary route single chip machine controlling circuit U1 internal processes is from its 23rd pin I/O mouth output drive signal, the output low-potential signal makes triode Q1 conducting through resistance R 3, be input to FDD-5 transmitter module IC2 the 2nd pin, and deliver to the 3rd pin of FDD-5 transmitter module IC2, high-frequency signal to emission is modulated, the 4th pin of FDD-5 transmitter module IC2 connects antenna FDD-5 transmitter module IC1 is launched modulated frequency electromagnetic waves, the 4th pin audio signal output end CPA of FDD-5 transmitter module IC1 directly drives common electrical dynamic formula loudspeaker Y sounding, its the 2nd pin data output end output high level makes LED get electroluminescence through current-limiting resistance R6 simultaneously, expression receives the alerting signal of extension set, reminds the professional to troubleshooting of faults; Third Road makes loudspeaker BYY send ticking by the 5th pin output low level of single chip machine controlling circuit U1 after resistance R 4 current limlitings.

More than show and described ultimate principle of the present utility model and principal character and advantage thereof; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the explanation just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. inflammable gas supervising device, it is characterized in that: detect combustable gas concentration by the MQ gas sensor, the resistance of MQ gas sensor increases with the combustable gas concentration that is contacted and reduces, the MQ gas sensor connects sample resistance R1, after connecting resistance R 2, sample resistance R1 output is input to A/D change-over circuit U2, A/D change-over circuit U2 output is connected to single chip machine controlling circuit U1, divide three tunnel control outputs by single chip machine controlling circuit U1, the output signal of first via single chip machine controlling circuit U1 is input to the base stage of triode Q2 through resistance R 5, the collector output of triode Q2 connects relay J 1, relay J 1 controlling and driving contactor KM; The output signal of the second road single chip machine controlling circuit U1 is through current-limiting resistance R4 controlling and driving loudspeaker BYY; The output signal of Third Road single chip machine controlling circuit U1 is input to the base stage of triode Q1 through resistance R 3, and the collector output of triode Q1 connects FDD-5 transmitter module IC2.

2. inflammable gas supervising device according to claim 1, it is characterized in that: the electromagnetic wave of described FDD-5 transmitter module IC1 sends to JDD-5 receiver module IC1, JDD-5 receiver module IC1 audio signal output end CPA output connects loudspeaker Y, and its CP/I/O data output end is through current-limiting resistance R6 control LED.