CN204189267U - Smog detecting circuit - Google Patents
Smog detecting circuit Download PDFInfo
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- CN204189267U CN204189267U CN201420659247.XU CN201420659247U CN204189267U CN 204189267 U CN204189267 U CN 204189267U CN 201420659247 U CN201420659247 U CN 201420659247U CN 204189267 U CN204189267 U CN 204189267U
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Abstract
The utility model discloses a kind of smog detecting circuit, relate to electronic technology field, first triode and infrared diode form infrared transmitter, form infrared radiation receiving circuit by the built in op amplifying circuit of phototriode and single-chip microcomputer, wherein infrared diode and phototriode form labyrinth cavity configuration; Single-chip microcomputer connects the base stage of the first triode by the first resistance, the emitter of the first triode connects negative electrode and the 3rd electric capacity of infrared diode, the anode of infrared diode connects the 20 resistance and the 21 resistance respectively by the 4th resistance, and the 21 resistor coupled in parallel connects the 20 electric capacity; The two ends of phototriode connect single-chip microcomputer respectively; The collector of phototriode connects the second resistance and the 3rd resistance respectively by the 5th resistance, and the 3rd resistor coupled in parallel connects the second electric capacity; The emitter of phototriode connects the 6th resistance, and the 6th resistor coupled in parallel connects the 4th electric capacity.The utility model simplifies circuit, improves the susceptibility of circuit.
Description
Technical field
The utility model relates to electronic technology field, particularly relates to a kind of smog detecting circuit.
Background technology
Smog detecting circuit, is also referred to as smoke fire detector, smoke alarm, smoke detector, Smoke Detector and cigarette propagated sensation sensor, is mainly used in fire-fighting system, in safety-protection system construction, also has application.It a kind ofly typically transfers civilian equipment to by space fire protection.20 century 70s, the engineers of Nasa devises spacelab, if but laboratory is on fire, and that will be a burden.So Nasa and the joint study of Honeywell Inc. of the U.S., the first smoke detector for spacelab utility model, for fire alarm.Nowadays, household kitchen, supermarket, shop, dancing hall and warehouse etc., the figure of the smoke detector that grows on trees.
Infrared beam smoke detector is line style detector, and light-beam transmitter and optoelectronic receiver are divided into two independently parts by it, and use the time-division to pretend two right places, centre light beam couples together.Infrared beam smoke detector is divided into again correlation type and reflection-type two kinds.Comparatively large or that easily generation the is fire-retardant place of smog is produced after being suitable for being arranged on breaking out of fire; It should not be arranged on the comparatively large or ventilation speed place faster of smog at ordinary times.
There is circuit structure complexity in existing smog detecting circuit, and insensitive to smog, and time delay warning, cannot meet the multiple needs of practical application.
Utility model content
The utility model provides a kind of smog detecting circuit, and the utility model simplifies circuit, improves the susceptibility of circuit, described below:
A kind of smog detecting circuit, comprise: single-chip microcomputer, infrared diode, phototriode, the first triode, described first triode and described infrared diode form infrared transmitter, form infrared radiation receiving circuit by the built in op amplifying circuit of described phototriode and described single-chip microcomputer, wherein said infrared diode and described phototriode form labyrinth cavity configuration;
Described single-chip microcomputer connects the base stage of described first triode by the first resistance, the emitter of described first triode connects negative electrode and the 3rd electric capacity of described infrared diode, the anode of described infrared diode connects the 20 resistance and the 21 resistance respectively by the 4th resistance
Described 21 resistor coupled in parallel connects the 20 electric capacity; The two ends of described phototriode connect described single-chip microcomputer respectively; The collector of described phototriode connects the second resistance and the 3rd resistance respectively by the 5th resistance, and described 3rd resistor coupled in parallel connects the second electric capacity; The emitter of described phototriode connects the 6th resistance, and described 6th resistor coupled in parallel connects the 4th electric capacity.
Described second resistance, described 5th resistance are infrared receiver triode current-limiting resistance, described 3rd electric capacity is filter capacitor, described 4th resistance, described 20 resistance are the current-limiting resistance of infraluminescence pipe, and described 21 resistance is divider resistance, described 20 electric capacity is filter capacitor.
The model of described single-chip microcomputer is HT45F23.
The beneficial effect of the technical scheme that the utility model provides is: the utility model forms chamber, smog labyrinth by infrared diode and phototriode, when there is no smog, infrared diode is bright, and phototriode is with regard to conducting, and infrared diode goes out phototriode with regard to cut-off; When there being smog, the also not conducting of the bright phototriode of infrared diode, at this moment just illustrates and has smog to exist, and single-chip microcomputer will process this information and action accordingly and warning.Improve the susceptibility of whole circuit for detecting to smog by above-mentioned design, meet the needs in practical application.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of smog detecting circuit;
Fig. 2 is the circuit diagram of single-chip microcomputer.
In accompanying drawing, the list of parts representated by each label is as follows:
U1: single-chip microcomputer; LED1: infrared diode;
T1: phototriode; Q1: the first triode;
R1: the first resistance; R4: the four resistance;
R20: the two ten resistance; R21: the two ten one resistance;
C20: the two ten electric capacity; R5: the five resistance;
R2: the second resistance; R3: the three resistance;
C2: the second electric capacity; R6: the six resistance;
C3: the three electric capacity; C4: the four electric capacity.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below the utility model embodiment is described in further detail.
See Fig. 1 and Fig. 2, smog detecting circuit comprises: single-chip microcomputer U1, infrared diode LED1, phototriode T1, the first triode Q1, first triode Q1 and infrared diode LED1 forms infrared transmitter, infrared radiation receiving circuit is formed by the built-in OPA (operational amplification circuit) of phototriode T1 and single-chip microcomputer U1, wherein infrared diode LED1 and phototriode T1 forms labyrinth cavity configuration, forms smog detecting circuit.
3rd pin (NET2) of single-chip microcomputer U1 connects the base stage of the first triode Q1 by the first resistance R1, the emitter of the first triode Q1 meets negative electrode and the 3rd electric capacity C3 of infrared diode LED1, the anode of infrared diode LED1 meets the 20 resistance R20 and the 21 resistance R21 respectively by the 4th resistance R4, and the 21 resistance R21 is connected in parallel the 20 electric capacity C20; The two ends of phototriode T1 connect second and the 4th pin (NET1 and NET3) of single-chip microcomputer U1 respectively; The collector of phototriode T1 connects the second resistance R2 and the 3rd resistance R3 respectively by the 5th resistance R5, and the 3rd resistance R3 is connected in parallel the second electric capacity C2; The emitter of phototriode T1 connects the 6th resistance R6, and the 6th resistance R6 is connected in parallel the 4th electric capacity C4.
Wherein, second resistance R2, the 5th resistance R5 are infrared receiver triode current-limiting resistance, 3rd electric capacity C3 is filter capacitor, and the 4th resistance R4, the 20 resistance R20 are the current-limiting resistance of infraluminescence pipe, and the 21 resistance R21 is divider resistance, the 20 electric capacity C20 is filter capacitor.
3rd pin of single-chip microcomputer U1 exports control signal and controls the first triode Q1 conducting and cut-off through the first resistance R1, the conducting of the first triode Q1 and cut-off control the on and off of infrared diode LED1,3rd electric capacity C3 is bypass filter capacitor, infrared diode LED1 and phototriode T1 forms chamber, smog labyrinth, when there is no smog, infrared diode LED1 is bright, and phototriode T1 is with regard to conducting, and infrared diode LED1 goes out phototriode T1 with regard to cut-off; When there being smog, the bright phototriode T1 of infrared diode LED1 also not conducting, at this moment just illustrates and has smog to exist, and single-chip microcomputer U1 will process this information and action accordingly and warning.
6th resistance R6, the 4th electric capacity C4 are electric current changing voltage circuit, wherein the size of output voltage is determined by the size of the resistance value of the 6th resistance R6, because phototriode T1 output current is very little, therefore the resistance of the 6th resistance R6 requires that very great talent is passable, the 6th resistance R6=10M here, output signal NET1 and NET2 is input to the second pin and the 4th pin of single-chip microcomputer U1, and amplify the smoke signal of induction, the smoke signal after amplification is input in small signal amplification circuit.
The model of preferred single-chip microcomputer U1 is HT45F23.
The utility model embodiment is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (3)
1. a smog detecting circuit, comprising: single-chip microcomputer, infrared diode, phototriode, the first triode, is characterized in that,
Described first triode and described infrared diode form infrared transmitter, form infrared radiation receiving circuit by the built in op amplifying circuit of described phototriode and described single-chip microcomputer, wherein said infrared diode and described phototriode form labyrinth cavity configuration;
Described single-chip microcomputer connects the base stage of described first triode by the first resistance, the emitter of described first triode connects negative electrode and the 3rd electric capacity of described infrared diode, the anode of described infrared diode connects the 20 resistance and the 21 resistance respectively by the 4th resistance
Described 21 resistor coupled in parallel connects the 20 electric capacity; The two ends of described phototriode connect described single-chip microcomputer respectively; The collector of described phototriode connects the second resistance and the 3rd resistance respectively by the 5th resistance, and described 3rd resistor coupled in parallel connects the second electric capacity; The emitter of described phototriode connects the 6th resistance, and described 6th resistor coupled in parallel connects the 4th electric capacity.
2. a kind of smog detecting circuit according to claim 1, it is characterized in that, described second resistance, described 5th resistance are infrared receiver triode current-limiting resistance, described 3rd electric capacity is filter capacitor, described 4th resistance, described 20 resistance are the current-limiting resistance of infraluminescence pipe, and described 21 resistance is divider resistance, described 20 electric capacity is filter capacitor.
3. a kind of smog detecting circuit according to claim 1, is characterized in that, the model of described single-chip microcomputer is HT45F23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420659247.XU CN204189267U (en) | 2014-11-05 | 2014-11-05 | Smog detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420659247.XU CN204189267U (en) | 2014-11-05 | 2014-11-05 | Smog detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204189267U true CN204189267U (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420659247.XU Expired - Fee Related CN204189267U (en) | 2014-11-05 | 2014-11-05 | Smog detecting circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204189267U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104318706A (en) * | 2014-11-05 | 2015-01-28 | 天津市畅悦电子科技有限公司 | Smoke detection circuit |
| CN109493560A (en) * | 2018-11-12 | 2019-03-19 | 中国兵器装备集团上海电控研究所 | Piggyback pod optical detector pollution detection optical path based on extreme ultraviolet light detector |
-
2014
- 2014-11-05 CN CN201420659247.XU patent/CN204189267U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104318706A (en) * | 2014-11-05 | 2015-01-28 | 天津市畅悦电子科技有限公司 | Smoke detection circuit |
| CN109493560A (en) * | 2018-11-12 | 2019-03-19 | 中国兵器装备集团上海电控研究所 | Piggyback pod optical detector pollution detection optical path based on extreme ultraviolet light detector |
| CN109493560B (en) * | 2018-11-12 | 2020-10-16 | 中国兵器装备集团上海电控研究所 | Power cabin optical detector pollution detection light path based on far ultraviolet detector |
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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: 20150304 Termination date: 20171105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |