CN202383804U - Gas concentration monitoring control device - Google Patents
Gas concentration monitoring control device Download PDFInfo
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- CN202383804U CN202383804U CN2012200060564U CN201220006056U CN202383804U CN 202383804 U CN202383804 U CN 202383804U CN 2012200060564 U CN2012200060564 U CN 2012200060564U CN 201220006056 U CN201220006056 U CN 201220006056U CN 202383804 U CN202383804 U CN 202383804U
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Abstract
The utility model provides a gas concentration monitoring control device. According to the utility model, a switch power circuit is connected with the power interface of a singlechip, the output end of a fault detection circuit is connected with the input port of the singlechip, the output port of the singlechip is connected with the input end of an alarm circuit and the input end of a valve drive circuit respectively, and the alarm circuit comprises a buzzer circuit, an acousto-optic alarm circuit and a sensor detection circuit. When the gas concentration monitoring control device detects gas leakage, the detection circuit generates a gas-electricity signal and transmits the signal to the singlechip, the singlechip controls the buzzer to give an early alarm signal, after time delay and judgment, the leakage accident is confirmed, a red light alarm is given, and meanwhile, an emergency processing program is initiated, a valve is closed and an air source is cut off. The combustible gas concentration alarm range of the gas concentration monitoring control device is set to be 1%-25% LEL. The difference of the alarm actuation value and the combustible gas concentration alarm set value of a detector cannot exceed +/-3% LEL.
Description
Technical field
The utility model relates to a kind of gas concentration monitor controller, belongs to the control device technical field.
Background technology
In commercial production and daily life, along with growth in the living standard and expanding economy, the scope that combustible gas is used more and more widely.Yet of common occurrence about accidents such as flammable gas explosion, leakage suffocate, therefore flammable gas alarm designed in recent years.As the term suggests gas alarm is exactly a gas leakage detection alarm instrument.Alarm can be monitored the leak case of inflammable gas in real time, in case reveal, promptly inflammable gas reaches finite concentration in the air, and then alarm carries out sound immediately, light is reported to the police, and effectively prevents the generation of accident, satisfies the needs of people to gas safe.There are problems such as measurement parameter is not very accurate, complex structure, cost is high, control ability is weak, inconvenient operation in existing alarm.
Summary of the invention
The purpose of the utility model be for solve existing alarm exist measurement parameter not very not accurately, the problem of weak, the inconvenient operation of complex structure, control ability, and then a kind of gas concentration monitor controller is provided.
The purpose of the utility model realizes through following technical scheme:
A kind of gas concentration monitor controller; Comprise: switching power circuit, failure detector circuit, single-chip microcomputer, warning circuit and valve driving circuit; Said switching power circuit is connected with the power interface of single-chip microcomputer; The output terminal of failure detector circuit is connected with input of single chip, and single machine output end is connected with the valve driving circuit input end with warning circuit respectively, and said warning circuit comprises buzzer circuit, sound light alarming circuit and sensor detection circuit.
The utility model is when gas leakage, and testing circuit produces " gas---" signal and send single-chip microcomputer, and the Single-chip Controlling hummer sends the pre-alarm signal; After delaying time, judge, confirming as accident leakage, send ruddiness and report to the police; Start emergency processing program simultaneously; Valve-off cuts off source of the gas, and opens exhaust fan and get rid of indoor contaminated air; Damage if detect gas sensor, the system closing valve is also lighted the yellow alarm lamp, and the prompting user changes gas sensor.
The utility model measurement parameter is accurate, simple in structure, control ability is stronger, easy to operate.Set the combustable gas concentration alarm range at 1% ~ 25%LEL.The actuation of an alarm value of detector and the difference of combustable gas concentration alarm setting value are no more than positive and negative 3%LEL.
Description of drawings
Fig. 1 is the structural representation of a kind of gas concentration monitor controller of the utility model;
Fig. 2 is the utility model sensor detection circuit structural representation;
Fig. 3 is the utility model failure detector circuit structural representation;
Fig. 4 is the utility model buzzer circuit structural representation;
Fig. 5 is the utility model sound light alarming circuit structural representation;
Fig. 6 is the utility model switching power circuit structural representation.
Embodiment
To combine accompanying drawing that the utility model is done further detailed description below: present embodiment provided detailed embodiment, but the protection domain of the utility model is not limited to following embodiment being to implement under the prerequisite with the utility model technical scheme.
Like Fig. 1 ~ shown in Figure 6; A kind of gas concentration monitor controller that present embodiment is related; Comprise: switching power circuit 1, failure detector circuit 2, single-chip microcomputer 3, warning circuit 4 and valve driving circuit 8; Said switching power circuit 1 is connected with the power interface of single-chip microcomputer 3; The output terminal of failure detector circuit 2 is connected with the input port of single-chip microcomputer 3, and the output port of single-chip microcomputer 3 is connected with valve driving circuit 8 input ends with warning circuit 4 respectively, and said warning circuit 4 comprises buzzer circuit 5, sound light alarming circuit 6 and sensor detection circuit 7.
The model of said single-chip microcomputer 3 is AT89C2051.
As shown in Figure 3, when gas sensor was short-circuited, the gas sensor check point was directly linked+5V, was high level.When gas sensor opens circuit; Gas sensor output is low level near 0V, and operate as normal and combustable gas concentration to surpass the gas sensor output area of concentration set point be 0.3 ~ 4.0; According to this designing requirement, select double operational TL062 as short circuit and the voltage comparator that opens circuit.The comparator reference that opens circuit voltage is 0.5V, and short circuit comparer reference voltage is 4.9V.TL062 (A) makes to open circuit comparer.2 pin are the reference voltage input.Reference voltage is provided through electric resistance partial pressure by+5V, and getting R20 is 10k Ω, and R21 is 1 k Ω, and then the open circuit voltage benchmark is { 5/ (10+1) } ≈ 0.5V.3 pin are the detection input point that opens circuit.TL062 (B) makes the short circuit comparer.6 pin are the reference voltage input.Reference voltage is provided through electric resistance partial pressure by 5V, and getting R23 is 1 k Ω, and R24 is 47 k Ω, and then the short-circuit voltage benchmark is { 5/ (47+1) } * 47 ≈ 4.9V.5 pin are surveyed input point.The selection of main devices: 1. resistance R 20, R23; RJ-(0.25 ~ 1) k; 2. resistance R 21; RJ-(0.25 ~ 10) k; 3. resistance R 24RJ-(0.25 ~ 47) k; 4. double operational; TL062 is by resistance R 20 ~ R21, and R23 ~ R24 double operational TL062 enough becomes failure detector circuit.
As shown in Figure 5, the sound and light alarm circuit design.ABSORPTION CURRENT when the P1 mouth of single chip computer AT 89C2051, P3 mouth low level can reach 20mA; Do not need external drive circuit; Directly the driven for emitting lights diode so select LED double-colored (red, green) anode light diode BT311057 altogether for use, is directly linked the single-chip microcomputer pin through current-limiting resistance;
Light-emitting diode display adopts the diode displaying field.SCM system is eight n segment display ns through what use always, and 8 light emitting diodes are promptly arranged in the light-emitting diode display, representative " a, b, c, d, e, f, g " seven fields and a full radix point " dp ".It has common the moon and altogether positive two kinds of structures.What we adopted is common anode, and promptly the light emitting diode of light-emitting diode display is anodal links to each other, and when the negative hummer of diode is used as the indication of reporting to the police, selects once-through type FM12-5V model for use.The hummer WV is+5V that working current is more than 20mA.The drive current of single-chip microcomputer is not enough, can not directly drive, must external power drive.Therefore, select the power drive of positive-negative-positive triode 9012 as hummer for use, the resistance that links to each other with base stage is got 2k Ω, guarantees that triode is operated in state of saturation.
As shown in Figure 5, the sound light alarming circuit relay indicating light is the green light flicker, and the control of its duty is accomplished by P1.1.Through the setting of software, export the break-make that a square wave is controlled triode VT1 from P1.1, thus the flicker of Control work pilot lamp.When the concentration of gas leakage reaches a certain value, by software P1.3 is put 1, triode VT3 conducting this moment, green alarm lamp goes out, and hummer sends chimes of doom simultaneously.The bright hummer of red light rings expression and opens circuit; The bright hummer of amber light rings the expression short circuit.Very during low level, light emitting diode is lighted.
Switching power circuit is as shown in Figure 6, the about 100mA of single chip part load current, and the about 150mA of gas sensor load current, the Switching Power Supply power supply, behind rectifying and wave-filtering, the LM7805 input voltage is+8V to be output as+5V tributary voltage.Consider surplus, establishing total working current is 300mA, and then total power is about 3W, and the power consumption of LM7805 is 300mA * 3V ≈ 1 W.Therefore LM7805 must add heating radiator.The principle of stabilized voltage of Switching Power Supply all adopts the voltage regulation way of pulse-width-modulating type, and switch power efficiency is high, the voltage adaptation wide ranges, has added switch loop, inductance, voltage dependent resistor (VDR) etc. in the circuit to improve the antijamming capability of power supply.The i.e. ratio with ON time of closing through automatic change switching power tube, or through changing the purpose that oscillator output duty of ratio reaches voltage stabilizing.The design has adopted switching power circuit ripe in the former design.Added in the circuit absorb circuit, inductance, voltage dependent resistor (VDR), etc. to improve the anti-interference and impact resistance of power supply.
The about 0.3mA of the electric current that commutation diode flows through, the about 300V of DC voltage, the about 50KHz of frequency of operation is so select devices such as IN4007 commutation diode general on the market, LM7805 for use.Consider power consumption, R2, R3, R4, R6 select the resistance of 0.5W for use, and all the other resistance are selected 0.25W for use.Electric capacity: CBB-400-100N-I.
The single-chip microcomputer assembly routine adopts big good fortune G6 emulator to accomplish development and Design; All adopt assembly language to write,, adopt the modular construction Programming Methodology that software demarcation is become the relatively independent module of several function according to the design function requirement; Be each modular design algorithm and program circuit; Then by flowcharter, and after debugging each modular program successfully, link together again and always debug.When gas sensor was started working, when not running into inflammable gas, its resistance value also can increase, and through about 5min, its resistance value drops to a stationary value, at this moment just can use, so program has a warm, be 5min preheating time; During detecting, adopt by button the software delay method to carry out the shake of going of button; The driving voltage of solenoid valve is taken from the output of switch transformer secondary side rectification.Adopt pulse drive mode, the burst length is 20ms; Operate as normal green light flicker timing definition is following: a second circulation shows.In 1 second, green light is lighted 600ms, extinguishes 400ms; Combustable gas concentration transfinites: red light Chang Liang, a second circulation shows.In 1 second, buzzer warning 750ms, 250ms does not report to the police; Fault alarm: amber light Chang Liang, 200ms circulation.Buzzer warning 100ms in the 200ms, 100ms does not report to the police.
Claims (2)
1. gas concentration monitor controller; Comprise: switching power circuit, failure detector circuit, single-chip microcomputer, warning circuit and valve driving circuit; It is characterized in that; Said switching power circuit is connected with the power interface of single-chip microcomputer; The output terminal of failure detector circuit is connected with input of single chip, and single machine output end is connected with the valve driving circuit input end with warning circuit respectively, and said warning circuit comprises buzzer circuit, sound light alarming circuit and sensor detection circuit.
2. gas concentration monitor controller according to claim 1 is characterized in that, the model of said single-chip microcomputer is AT89C2051.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200060564U CN202383804U (en) | 2012-01-09 | 2012-01-09 | Gas concentration monitoring control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200060564U CN202383804U (en) | 2012-01-09 | 2012-01-09 | Gas concentration monitoring control device |
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| CN202383804U true CN202383804U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200060564U Expired - Fee Related CN202383804U (en) | 2012-01-09 | 2012-01-09 | Gas concentration monitoring control device |
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| CN (1) | CN202383804U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104978828A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | Combustible gas alarm and exhaust system in data storage chamber |
| CN104978826A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | Steady power supplying type combustible gas detection apparatus |
| CN105006112A (en) * | 2015-06-23 | 2015-10-28 | 山东工商学院 | Civil combustible and toxic gas smoke monitoring device |
| CN105575063A (en) * | 2016-02-29 | 2016-05-11 | 镇江艾迪智能科技有限公司 | Novel gas alarm device |
| CN106205065A (en) * | 2016-09-13 | 2016-12-07 | 武汉百络优物联科技有限公司 | Switching value alarm |
| CN106766661A (en) * | 2017-01-19 | 2017-05-31 | 河南中医药大学 | Refrigerator refrigerant leakage alarm |
| CN106872410A (en) * | 2017-02-28 | 2017-06-20 | 中国石油化工股份有限公司 | A kind of water-surface oil spilling monitoring pre-warning and control method based on ultraviolet reflectance |
| CN107274639A (en) * | 2017-08-09 | 2017-10-20 | 李剑兵 | Family fuel gas monitoring alarm movement device |
| CN108766915A (en) * | 2018-08-06 | 2018-11-06 | 江阴佳泰电子科技有限公司 | One kind being used for the anti-fragmentation alarm system of wafer |
-
2012
- 2012-01-09 CN CN2012200060564U patent/CN202383804U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104978828A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | Combustible gas alarm and exhaust system in data storage chamber |
| CN104978826A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | Steady power supplying type combustible gas detection apparatus |
| CN105006112A (en) * | 2015-06-23 | 2015-10-28 | 山东工商学院 | Civil combustible and toxic gas smoke monitoring device |
| CN105575063A (en) * | 2016-02-29 | 2016-05-11 | 镇江艾迪智能科技有限公司 | Novel gas alarm device |
| CN106205065A (en) * | 2016-09-13 | 2016-12-07 | 武汉百络优物联科技有限公司 | Switching value alarm |
| CN106766661A (en) * | 2017-01-19 | 2017-05-31 | 河南中医药大学 | Refrigerator refrigerant leakage alarm |
| CN106872410A (en) * | 2017-02-28 | 2017-06-20 | 中国石油化工股份有限公司 | A kind of water-surface oil spilling monitoring pre-warning and control method based on ultraviolet reflectance |
| CN107274639A (en) * | 2017-08-09 | 2017-10-20 | 李剑兵 | Family fuel gas monitoring alarm movement device |
| CN108766915A (en) * | 2018-08-06 | 2018-11-06 | 江阴佳泰电子科技有限公司 | One kind being used for the anti-fragmentation alarm system of wafer |
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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: 20120815 Termination date: 20140109 |