CN201867939U - Poisonous-gas monitoring and warning device - Google Patents
Poisonous-gas monitoring and warning device Download PDFInfo
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- CN201867939U CN201867939U CN2010205445352U CN201020544535U CN201867939U CN 201867939 U CN201867939 U CN 201867939U CN 2010205445352 U CN2010205445352 U CN 2010205445352U CN 201020544535 U CN201020544535 U CN 201020544535U CN 201867939 U CN201867939 U CN 201867939U
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Abstract
The utility model relates to the field of gas warning devices and in particular to a poisonous-gas monitoring and warning device, which comprises a direct-current voltage-stabilizing power supply, a gas sensor, a voltage comparing and amplifying circuit, an early-warning control and warning circuit, a buzzer warning circuit and a telephone-voice warning circuit; when a combustible gas or a poisonous gas is detected by the gas sensor, a trigger signal is amplified through a voltage comparing and amplifying circuit, and the amplified signal is transmitted to the early-warning control and warning circuit, the buzzer warning circuit and the telephone-voice warning circuit; the automatic monitoring for various combustible and poisonous gases can be realized by the device; if the gas reaches warning concentration, a buzzer sounds and gives an alarm, a telephone is controlled to be off-hook, automatically dial and give a voice alarm, and an opposite side is reminded to take corresponding measures; and when the concentration of a harmful gas is decreased to be below the warning concentration, acousto-optic warning is automatically stopped, but an exhaust fan still properly continues to work, so that the poisonous gas reaches lower early-warning concentration, and the air is removed and purified.
Description
Technical field
The utility model relates to gas alarm device field, particularly is a kind of toxic gas monitoring alarm device.
Background technology
In recent years, whole nation gas industry development is swift and violent, gases such as liquefied gas, rock gas, coal gas have been used widely in industry and commerce and town dweller user as clean energy resource, particularly along with " rapid progress of West-east Gas engineering, the gas industry development potentiality is huge.Popularize and the application of gas have been brought into play enormous function to the quality of life of improving The Surroundings in Cities quality and raising resident undoubtedly, but widespread use along with combustion gas, because blast, poisoning and fire failure that gas leakage caused also happen occasionally, this has increased the dangerous and labile factor in city to a certain extent.In order to make combustion gas benefit the people better, benefit society, reduce and stop various blast and the fire failures that cause because of gas leakage, each combustion gas applying unit and resident select that a kind of suitable fuel gas alarm is real to be the act of necessity.
Alarm is the home-use fuel gas alarm of resident, generally is installed in the kitchen, and when meeting gas leakage, alarm can send sound and light alarm, or shows that with numeral external unit simultaneously links simultaneously.The alarm that has can be opened exhaust fan automatically, discharges combustion gas outdoor; But the alarm that has is the automatic self-closing gas valve when reporting to the police, in case combustion gas continues to leak.
The utility model content
The purpose of this utility model provides a kind of cheap, practical, function toxic gas monitoring alarm device how.
The technical scheme that the utility model adopted is such: a kind of toxic gas monitoring alarm device, comprise D.C. regulated power supply, gas sensor, voltage contrasting amplified circuit, early warning control warning circuit, buzzer alarm circuit and telephone phonic alarm circuit, when described gas sensor detects inflammable gas or toxic gas, trigger pip is amplified through voltage contrasting amplified circuit, and amplifying signal is transferred to early warning control warning circuit, buzzer alarm circuit and telephone phonic alarm circuit.
Described D.C. regulated power supply is after connecting diode rectifier circuit by the alternating current of 220V, delivers to the Vin end of three terminal regulator 7805, output+5V direct supply through capacitor C 1 filtered more stable direct current.
The A of described gas sensor, B two ends resistance are very big, and when inflammable gas or toxic gas, A, B two ends resistance will descend, and the pneumoelectric conversion produces trigger pip, and the big more resistance of concentration of toxic gases is more little, and trigger pip is strong more.
Described gas sensor connects warning potentiometer RP1 and early warning potentiometer RP2, after configuring the resistance of alarm apparatus RP1 and early warning potentiometer RP2, the 1st pin of warning potentiometer RP1, the 3rd pin and early warning potentiometer RP2 the 4th pin and the 6th pin resistance are fixed, voltage also is a fixed value, and the resistance that the resistance that the 1st pin of described warning potentiometer RP1 and the 3rd pin are set is set than the 4th pin and the 6th pin of early warning potentiometer RP2 is little.
The C terminal potential of described gas sensor is input to the 5th pin and the 10th pin of voltage contrasting amplified circuit, the current potential at warning potentiometer RP1 the 3rd pin place compares as the 5th pin current potential that the reference current potential is input to voltage contrasting amplified circuit the 6th pin and voltage contrasting amplified circuit, and the current potential at early warning potentiometer RP2 the 6th pin place compares as the 10th pin voltage that the reference current potential is input to voltage contrasting amplified circuit the 9th pin and voltage contrasting amplified circuit.
When the 5th pin current potential of described voltage contrasting amplified circuit is higher than the 6th pin current potential, the 7th pin output high level, drive buzzer alarm circuit and telephone phonic alarm circuit, when the 10th pin of described voltage contrasting amplified circuit is higher than the 9th pin current potential, the 8th pin output high level, the external exhaust apparatus of early warning control warning circuit starts, but buzzer alarm circuit and telephone phonic alarm circuit do not start.
The C end output circuit of described gas sensor is provided with S1, S2, three contacts of S0, can open circuit at place, three contacts, and the electrode of drawing connects anti-jamming circuit, and each function of warning device is independent of each other.
By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: this toxic gas monitoring alarm device can be realized monitoring automatically to various flammable toxic gases, if gas reaches warning concentration hummer sounding alarm, the automatic lang sound warning of going forward side by side of dialling of control phone off-hook, remind the other side to take appropriate measures, when being reduced to warning concentration under harmful gas concentration, sound and light alarm stops automatically, but the exhaust electric fan still suitably continues work, with harmful gas drain be lower than early warning concentration to concentration till, and making daily indoor harmful gas reach lower early warning concentration, the just automatic row's of unlatching scavenger fan is got rid of and is purified air.
Description of drawings
Fig. 1 is a frame structure synoptic diagram of the present utility model;
Fig. 2 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 and Figure 2, a kind of toxic gas monitoring alarm device, comprise D.C. regulated power supply 1, gas sensor 2, voltage contrasting amplified circuit 3, early warning control warning circuit 5, buzzer alarm circuit 6 and telephone phonic alarm circuit 7, when described gas sensor 2 detects inflammable gas or toxic gas, trigger pip is amplified through voltage contrasting amplified circuit 3, and amplifying signal is transferred to early warning control warning circuit 5, buzzer alarm circuit 6 and telephone phonic alarm circuit 7.
The alternating current of 220V is delivered to the primary coil of transformer through protective tube from plug, and from the alternating voltage that secondary coil induces about 12V deliver to diode D1, D2, D3, D4J carry out rectification, deliver to the Vin end of three terminal regulator 7805 again through capacitor C 1 filtered more stable direct current, output+5V D.C. regulated power supply.
A when MQ-5 gas sensor 2 is flat, B two ends resistance are very big, not during energize resistance about 200K Ω, connect with the mains and load circuit after reduce to 50-60K Ω during the preheated one-section time service, when detecting liquefied gas, rock gas and coal gas, A, B two ends resistance will descend, the pneumoelectric conversion produces trigger pip, and the big more resistance of gas bulk concentration is more little, and trigger pip is strong more.
Detect inflammable gas, when gas concentration reaches the early warning value that smaller early warning potentiometer RP2 sets, when the 10th pin of voltage contrasting amplified circuit LM324 is higher than the 9th pin current potential, the 8th pin output high level, gold-tinted is sent in the LED2 conducting, simultaneously relay J 0 adhesive, through triode 9013VT1 amplifying circuit, control the work of external vent fan or other safety feature, buzzer alarm circuit 6 and telephone phonic alarm circuit 7 do not start, and reach the purpose of early warning.
When the concentration of gas surpasses the concentration value of alarm settings, the A of MQ-5 gas sensor 2, B two ends resistance descends, make A, the B both end voltage descends, the current potential of C end raises, when the current potential of C end reaches current potential greater than 3 pin of pre-alarm position device RP1, input voltage compares the current potential of the 5th pin of amplifier among the amplifying circuit LM324 than the 6th pin current potential height, 7 pin output high level, the LED3 conducting glows, relay J 1 adhesive simultaneously through triode 9013VT2 and VT3 amplifying circuit, drives the hummer sounding alarm, the automatic lang sound warning of going forward side by side of dialling of control phone off-hook reminds the other side to take appropriate measures.
Voice alarm circuit K1 comprises recording mode and playback pattern, under recording mode, to pin record button REC and do not put promptly in recording, light emitting diode L0 lantern festival lights synchronously, recording stops when unclamping button or exceeding the time, and the priority of record button REC is higher than PLAYE and PLAYL button.The playback pattern comprises that the edge triggers playback, level triggers playback, loop playback, once is that the edge triggers playback by the PLAYE key, full section voice is emitted, unless outage or voice finish otherwise can not stop playback; The level triggers playback, level triggers playback when pinning the PLAYL key, unclamping button promptly stops, 4 pin of speech recording and reproducing integrated circuit are the loop playback addresses, as long as being connect high level, the 4th pin just can realize loop playback, perhaps the PLAYL key is pinned playback also capable of circulation, can only be cut off the power supply or unclamp the PLAYL key and just can stop.
The C end output circuit of gas sensor 2 is provided with S1, S2, three contacts of S0, at S1, S2 opens circuit at the place, draw S1, two observing and controlling electrodes of S2, also can be on above-mentioned each function basis of invariable, increase and become to open circuit trigger-type monitoring alarm function, if above-mentioned early warning control warning circuit 5, buzzer alarm circuit 6 and telephone phonic alarm circuit 7 each function have satisfied to be used, can be with S2, S3 opens circuit at the place, draw S3, S0 becomes the trigger-type detecting electrode that opens circuit, relay circuit no longer is subjected to each circuit triggers control of prime and directly is subjected to S3, S0 control, relay circuit can pass through S3, S0 connects different sensors, as other multiple automatic control purposes.Connect photoresistance as S3, S0, but relay control system is the Light control road lamp automatic start-stop just, S3, S0 are as the liquid level control electrode, and relay system can be taken out water supply etc. by automatically controlled water pump, various sound and light of alarm such as combustible gas, toxic gas are independent of each other with device is above-mentioned.
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 (3)
1. toxic gas monitoring alarm device, it is characterized in that: comprise D.C. regulated power supply (1), gas sensor (2), voltage contrasting amplified circuit (3), early warning control warning circuit (5), buzzer alarm circuit (6) and telephone phonic alarm circuit (7), when described gas sensor (2) detects inflammable gas or toxic gas, trigger pip is amplified through voltage contrasting amplified circuit (3), and amplifying signal is transferred to early warning control warning circuit (5), buzzer alarm circuit (6) and telephone phonic alarm circuit (7).
2. a kind of toxic gas monitoring alarm device according to claim 1, it is characterized in that: described gas sensor (2) connects warning potentiometer RP1 and early warning potentiometer RP2, after configuring the resistance of alarm apparatus RP1 and early warning potentiometer RP2, the 1st pin of warning potentiometer RP1, the 3rd pin and early warning potentiometer RP2 the 4th pin and the 6th pin resistance are fixed, voltage also is a fixed value, and the resistance that the resistance that the 1st pin of described warning potentiometer RP1 and the 3rd pin are set is set than the 4th pin and the 6th pin of early warning potentiometer RP2 is little.
3. a kind of toxic gas monitoring alarm device according to claim 1, it is characterized in that: the C end output circuit of described gas sensor (2) is provided with S1, S2, three contacts of S0, can open circuit at place, three contacts, the electrode of drawing connects anti-jamming circuit (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205445352U CN201867939U (en) | 2010-09-25 | 2010-09-25 | Poisonous-gas monitoring and warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205445352U CN201867939U (en) | 2010-09-25 | 2010-09-25 | Poisonous-gas monitoring and warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201867939U true CN201867939U (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205445352U Expired - Fee Related CN201867939U (en) | 2010-09-25 | 2010-09-25 | Poisonous-gas monitoring and warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201867939U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956030A (en) * | 2014-03-31 | 2014-07-30 | 福建省科正智能科技有限公司 | Indoor gas use safety control system |
-
2010
- 2010-09-25 CN CN2010205445352U patent/CN201867939U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956030A (en) * | 2014-03-31 | 2014-07-30 | 福建省科正智能科技有限公司 | Indoor gas use safety control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20120925 |