CN202661429U - Gas sensing device of security monitoring system - Google Patents
Gas sensing device of security monitoring system Download PDFInfo
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- CN202661429U CN202661429U CN 201220167482 CN201220167482U CN202661429U CN 202661429 U CN202661429 U CN 202661429U CN 201220167482 CN201220167482 CN 201220167482 CN 201220167482 U CN201220167482 U CN 201220167482U CN 202661429 U CN202661429 U CN 202661429U
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Abstract
The utility model discloses a gas sensing device of a security monitoring system, and relates to a monitoring equipment of the security monitoring system. The gas sensing device comprises a gas sensor circuit, a singlechip circuit, a radio frequency signal sending circuit and a power supply. The gas sensor circuit is used for generating an alarm analog signal after detecting that combustible gas exists in the air, periodically carrying out self check, and generating one state signal after each self check; the singlechip circuit is used for generating an alarm digital signal after analyzing and processing the alarm analog signal, and generating a state digital signal after analyzing and processing the state signal; the radio frequency signal sending circuit is used for converting the alarm digital signal into an alarm radio frequency signal, converting the state digital signal into a state radio frequency signal, and sending out the alarm radio frequency signal or the state radio frequency signal; and the power supply is used for supplying power for the radio frequency signal sending circuit, the singlechip circuit and the gas sensor circuit. The gas sensing device has a fault detection function, once a wireless combustible gas sensor becomes ineffective or the sensor has faults, a host machine can detect the problems in time and send out the alarm signal, so that the users can learn and solve the problems in time.
Description
Technical field
The utility model relates to a kind of watch-dog of safety defense monitoring system, more specifically to a kind of gas sensing device of safety defense monitoring system.
Background technology
What traditional gas sensor that is used for the inflammable gas detection adopted is the catalytic type sensor, and the catalytic type sensor is to utilize the resistance variations after the refractory metal platinum filament heats to measure combustable gas concentration.When inflammable gas enters the catalytic type sensor, cause oxidation reaction (flameless burning) on the platinum filament surface, the heat of its generation raises the temperature of platinum filament, and at this moment the resistivity of platinum filament will change.And above-mentioned catalytic type sensor all is to adopt sound and light alarm, wired connection or simple wireless connections usually.
The shortcoming that combustible gas sensing device in the market exists is: wireless combustible gas sensing device is in case inefficacy or inductor have fault, main frame but can't detect these situations, if circuit malfunction just can't send alerting signal like this, the user but can not get prompting, can't know the unusual condition of wireless combustible gas sensing device.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of gas sensing device of safety defense monitoring system, when the in a single day inefficacy of the gas sensing device of this safety defense monitoring system or gas sensing device are out of order, will be known by main frame.The technical scheme that adopts is as follows:
A kind of gas sensing device of safety defense monitoring system is characterized in that: comprise
The gas sensor circuit detects and produces a warning simulating signal after air has inflammable gas, regularly carries out self check, can produce a status signal after each self check;
Single chip circuit produces the warning digital signal by analysis with after processing to the warning simulating signal, and status signal is produced the status number signal by analysis with after processing;
The emission of radio frequency signals circuit converts the warning digital signal to the warning radiofrequency signal, converts the status number signal to the state radiofrequency signal, and warning radiofrequency signal or state emission of radio frequency signals are gone out;
Power supply is given emission of radio frequency signals circuit, single chip circuit, gas sensor circuit supply.
More excellent scheme, described gas sensor circuit adopt the two probes of catalytic type.
The utility model beneficial effect against existing technologies is, because available circuit is improved, therefore possesses fault detection capability, wireless like this combustible gas sensing device is in case inefficacy or inductor have fault, main frame can in time detect, and send the state radiofrequency signal, allow the user in time know and deal with problems.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model preferred embodiment;
Fig. 2 be preferred embodiment single chip circuit shown in Figure 1, circuit theory diagrams.
The implication of each mark is as follows among the figure: 1, single chip circuit; 2, power supply; 3, emission of radio frequency signals circuit; 4, gas sensor circuit.
Embodiment
As shown in Figure 1, 2, the gas sensing device of the safety defense monitoring system in this preferred embodiment comprises:
Emission of radio frequency signals circuit 3 converts the warning digital signal to the warning radiofrequency signal, converts the status number signal to the state radiofrequency signal, and warning radiofrequency signal or state emission of radio frequency signals are gone out;
Described gas sensor circuit 4 adopts the two probes of catalytic type.
As shown in Figure 2, the single chip circuit in the present embodiment 1 comprises singlechip chip U1.Power supply 2 adopts standard 220V AC-powered.Emission of radio frequency signals circuit 3 comprises that wireless data sends chip U2.Gas sensor circuit 4 comprises single-chip microcomputer U12, sensor SOR1.
U1 (the grand EM78P153S of justice); U2 (general city PT4550); U12 (little core PIC12F675); SOR1 (bright Sheng MC105).
Introduce the course of work below in conjunction with Fig. 2:
1, alerting signal:
Product is installed on ceiling or the wall, when gas sensor circuit 4 detects when having inflammable gas in the air, the resistivity of sensor SOR1 can change, because the characteristic variations of sensor SOR1, make the variation of the voltage generation simulation of gas sensor circuit 4, the variation of this voltage is through the 5th pin and the 6th pin of input single-chip microcomputer U12 after amplifying, then single-chip microcomputer U12 carries out Check processing, export a warning digital signal by single-chip microcomputer U12 the 2nd pin again after the processing, this warning digital signal is through the 10th pin of diode D2 input single-chip microcomputer U1, single-chip microcomputer U1 carries out data analysis and processing, the 2nd pin output alarm modulation signal of single-chip microcomputer U1 is connected to the 4th pin of chip U2 after finishing, chip U2 carries out the signal modulation, and the 3rd pin output 433.92MHz radiofrequency signal from chip U2 after the modulation is gone out by aerial radiation.
2, status signal:
Product working status has three kinds, is respectively normal condition, low state of charge, malfunction.Gas sensor circuit 4 can regularly carry out self check, the 5th pin and the 6th pin of single-chip microcomputer U12 will be inputted after each self check is complete after the amplification of circuit state signal process, then after single-chip microcomputer U12 carries out Check processing, again by single-chip microcomputer U12 the 2nd pin output current state digital signal, the status number signal is through the 10th pin of diode D2 input single-chip microcomputer U1, single-chip microcomputer U1 carries out data analysis and processing, the 2nd pin output state modulation signal of single-chip microcomputer U1 is connected to the 4th pin of chip U2 after finishing, chip U2 carries out the signal modulation, and the 3rd pin output 433.92MHz radiofrequency signal from chip U2 after the modulation is gone out by aerial radiation.The product main frame can be received wireless signal within the designated time, then make prompting according to signal, so the user can learn by the prompting of main frame whether normal, the low electricity of work and the fault of present product.
The above is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model; Be all equivalents of doing according to claim scope of the present utility model, be the utility model claim scope and cover.
Claims (2)
1. the gas sensing device of a safety defense monitoring system is characterized in that: comprise
The gas sensor circuit detects and produces a warning simulating signal after air has inflammable gas, regularly carries out self check, can produce a status signal after each self check;
Single chip circuit produces the warning digital signal by analysis with after processing to the warning simulating signal, and status signal is produced the status number signal by analysis with after processing;
The emission of radio frequency signals circuit converts the warning digital signal to the warning radiofrequency signal, converts the status number signal to the state radiofrequency signal, and warning radiofrequency signal or state emission of radio frequency signals are gone out;
Power supply is given emission of radio frequency signals circuit, single chip circuit, gas sensor circuit supply.
2. the gas sensing device of safety defense monitoring system as claimed in claim 1 is characterized in that: the two probes of described gas sensor module employing catalytic type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220167482 CN202661429U (en) | 2012-04-18 | 2012-04-18 | Gas sensing device of security monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220167482 CN202661429U (en) | 2012-04-18 | 2012-04-18 | Gas sensing device of security monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202661429U true CN202661429U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220167482 Expired - Fee Related CN202661429U (en) | 2012-04-18 | 2012-04-18 | Gas sensing device of security monitoring system |
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| Country | Link |
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| CN (1) | CN202661429U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111415493A (en) * | 2020-04-01 | 2020-07-14 | 宿迁市计量测试所 | Combustible gas alarm circuit capable of rapidly alarming |
-
2012
- 2012-04-18 CN CN 201220167482 patent/CN202661429U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111415493A (en) * | 2020-04-01 | 2020-07-14 | 宿迁市计量测试所 | Combustible gas alarm circuit capable of rapidly alarming |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150418 |
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| EXPY | Termination of patent right or utility model |