CN105006094A - Simple smoke alarm low in false alarm rate - Google Patents
Simple smoke alarm low in false alarm rate Download PDFInfo
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- CN105006094A CN105006094A CN201510406599.3A CN201510406599A CN105006094A CN 105006094 A CN105006094 A CN 105006094A CN 201510406599 A CN201510406599 A CN 201510406599A CN 105006094 A CN105006094 A CN 105006094A
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- Prior art keywords
- phototriode
- electric capacity
- resistance
- emitting diode
- smoke alarm
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
Abstract
The invention discloses a simple smoke alarm low in false alarm rate. The circuit structure of the smoke alarm comprises a temperature control, capacitors from number one to number nine, resistors from number one to number seven, a first infrared light emitting diode, a second infrared light emitting diode and photosensitive triodes from number one to number fourth. The smoke alarm is simple in structure, low in product cost and convenient to use; in addition, under the condition that the normal usage of the smoke alarm is ensured, the false alarm rate of the smoke alarm is further reduced.
Description
Technical field
The invention discloses a kind of simple and easy low rate of false alarm smoke alarm, relate to the technical field of circuit design of temperature control, light control sensor.
Background technology
Smoke alarm, another name fire hazard aerosol fog alarm, smoke transducer, smoke sensing device etc.General will independently, products in kind powered battery or AC-powered battery are standby electricity, ready-madely to send acousto-optic instruction when reporting to the police, and are called free-standing smoke alarm.By bus-powered, bus can be connected with multiple, network with fire alarm control unit, communication forms a warning system, on-the-spot voiceless sound during warning, main frame acousto-optic is pointed out, and this kind of smoke-sensitive alarm device is generally referred to as smoke detector.Smoke detector divide band geocoding, not with geocoding.
In prior art, the circuit structure of smoke alarm appoints the space so having and simplify further, thus reduces cost of products further; Meanwhile, in prior art, the rate of false alarm of smoke alarm is relatively high.
Summary of the invention
Technical matters to be solved by this invention is: for the defect of prior art, provides a kind of simple and easy low rate of false alarm smoke alarm.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of simple and easy low rate of false alarm smoke alarm, comprises temperature controller, also comprises the first to the 9th electric capacity, the first to the 7th resistance, first, second infrarede emitting diode, and first to fourth phototriode, wherein,
Described first electric capacity is connected with the base stage of the first phototriode, and the collector of the first phototriode is connected with one end of the second resistance, the negative pole of the first infrarede emitting diode respectively through the second electric capacity; The positive pole of the first infrarede emitting diode is connected with one end of the 3rd resistance, one end of the 7th electric capacity respectively, the other end of the 7th electric capacity is connected with one end of the 5th resistance, one end of the 6th resistance respectively, the other end of the 5th resistance is connected with temperature controller, and temperature controller is also connected with the collector of the 3rd phototriode, the base stage of the 4th phototriode respectively; The other end of the 6th resistance is connected with the collector of the 4th phototriode, and the emitter of the 4th phototriode is connected through the 7th resistance one end with the 9th electric capacity; The other end of the 9th electric capacity is connected with one end of the first resistance, one end of the 3rd to the 6th electric capacity respectively, and ground connection; The other end of the first resistance is connected with the emitter of the first phototriode, the positive pole of the second infrarede emitting diode respectively; The other end of the 3rd electric capacity is connected with the other end of the second resistance; The other end of the 4th electric capacity is connected with the negative pole of the second infrarede emitting diode, the base stage of the second phototriode respectively; The other end of the 5th electric capacity is connected with the emitter of the second phototriode, and the collector of the second phototriode is connected with the other end of the 3rd resistance, one end of the 8th electric capacity respectively through the 4th resistance; The other end of the 8th electric capacity is connected with the base stage of the 3rd phototriode; The other end of the 6th electric capacity is connected with the emitter of the 3rd phototriode.
As present invention further optimization scheme, described temperature controller adopts bimetallic strip Kick type temperature controller.
As present invention further optimization scheme, the concrete model of described bimetallic strip Kick type temperature controller is KSD301.
As present invention further optimization scheme, the concrete model of first, second infrarede emitting diode described is SE303 or PH303.
As present invention further optimization scheme, the concrete model of described first to fourth phototriode is PT5A850AC.
The present invention adopts above technical scheme compared with prior art, has following technique effect: structure of the present invention is simple, and low cost product is easy to use, when ensureing the normal use of product, is reduced further by the false alarm rate of product.
Accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present invention;
Wherein: C1 to C9 is respectively the first to the 9th electric capacity, R1 to R7 is respectively the first to the 7th resistance, VD1 and VD2 is respectively first, second infrarede emitting diode, and VT1 to VT4 is respectively first to fourth phototriode.
Embodiment
Be described below in detail embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Figure circuit connection diagram of the present invention as shown in Figure 1, described simple and easy low rate of false alarm smoke alarm, comprise temperature controller, also comprise the first to the 9th electric capacity, the first to the 7th resistance, first, second infrarede emitting diode, and first to fourth phototriode, wherein, described first electric capacity is connected with the base stage of the first phototriode, and the collector of the first phototriode is connected with one end of the second resistance, the negative pole of the first infrarede emitting diode respectively through the second electric capacity; The positive pole of the first infrarede emitting diode is connected with one end of the 3rd resistance, one end of the 7th electric capacity respectively, the other end of the 7th electric capacity is connected with one end of the 5th resistance, one end of the 6th resistance respectively, the other end of the 5th resistance is connected with temperature controller, and temperature controller is also connected with the collector of the 3rd phototriode, the base stage of the 4th phototriode respectively; The other end of the 6th resistance is connected with the collector of the 4th phototriode, and the emitter of the 4th phototriode is connected through the 7th resistance one end with the 9th electric capacity; The other end of the 9th electric capacity is connected with one end of the first resistance, one end of the 3rd to the 6th electric capacity respectively, and ground connection; The other end of the first resistance is connected with the emitter of the first phototriode, the positive pole of the second infrarede emitting diode respectively; The other end of the 3rd electric capacity is connected with the other end of the second resistance; The other end of the 4th electric capacity is connected with the negative pole of the second infrarede emitting diode, the base stage of the second phototriode respectively; The other end of the 5th electric capacity is connected with the emitter of the second phototriode, and the collector of the second phototriode is connected with the other end of the 3rd resistance, one end of the 8th electric capacity respectively through the 4th resistance; The other end of the 8th electric capacity is connected with the base stage of the 3rd phototriode; The other end of the 6th electric capacity is connected with the emitter of the 3rd phototriode.
The serial Feedback photosensitive circuit that smoke alarm is made up of infraluminescence pipe, phototriode, the compositions such as transistor on-off circuit and integrated alarm circuit.When the clean non smoke of monitored environment, infrarede emitting diode VD1 is luminous with the initial current mixed up in advance.After this infrared light is received by phototriode VT1, its internal resistance reduces, and the electric current in VD1 and VT1 series circuit is increased, and the corresponding increase of luminous intensity of infrarede emitting diode VD2, phototriode internal resistance reduces further.Circulation like this just defines strong positive feedback process, until make the electric current in series connection photosensitive circuit reach maximal value, the pressure drop that R1 produces makes VT2 conducting through VD2, and VT3 ends, and warning circuit does not work.When the hurried increase of smog in the environment be monitored, light transmission in air worsens, and the luminous flux that now phototriode VT1 receives reduces, and its internal resistance increases, electric current in series connection photosensitive circuit also reduces thereupon, and the luminous intensity of light emitting diode VD1 also weakens thereupon.Circulation like this just defines degenerative process, and make the electric current in series connection photosensitive circuit until be reduced to initial current value, the voltage on R1 also declines, and VT2 is ended, and VT3 seeks logical, and warning circuit work, sends alerting signal.C1 is for preventing the interference of of short duration smog from arranging.
In the present invention, temperature controller adopts bimetallic strip Kick type temperature controller, this be a kind of using the bimetallic strip after constant temperature as thermo-responsive reaction component, the heat produced when product main part temperature raises is delivered on thermometal disk, reaching rapid action when operating temperature sets, is that contact disconnects or closes by mechanism's effect; When temperature drops to reset temperature setting, the rapid reinstatement of bimetallic strip, makes the closing of contact or disconnection, reaches the object being switched on or switched off circuit, thus control circuit.
In specific embodiment, model can be adopted to be the temperature controller of KSD301; The concrete model of first, second infrarede emitting diode described is SE303 or PH303; The concrete model of described first to fourth phototriode is PT5A850AC.
By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from present inventive concept.The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to technical spirit of the present invention, within the spirit and principles in the present invention, to any simple amendment that above embodiment is done, equivalent replacement and improvement etc., within the protection domain all still belonging to technical solution of the present invention.
Claims (5)
1. a simple and easy low rate of false alarm smoke alarm, is characterized in that: comprise temperature controller, also comprises the first to the 9th electric capacity, the first to the 7th resistance, first, second infrarede emitting diode, and first to fourth phototriode, wherein,
Described first electric capacity is connected with the base stage of the first phototriode, and the collector of the first phototriode is connected with one end of the second resistance, the negative pole of the first infrarede emitting diode respectively through the second electric capacity; The positive pole of the first infrarede emitting diode is connected with one end of the 3rd resistance, one end of the 7th electric capacity respectively, the other end of the 7th electric capacity is connected with one end of the 5th resistance, one end of the 6th resistance respectively, the other end of the 5th resistance is connected with temperature controller, and temperature controller is also connected with the collector of the 3rd phototriode, the base stage of the 4th phototriode respectively; The other end of the 6th resistance is connected with the collector of the 4th phototriode, and the emitter of the 4th phototriode is connected through the 7th resistance one end with the 9th electric capacity; The other end of the 9th electric capacity is connected with one end of the first resistance, one end of the 3rd to the 6th electric capacity respectively, and ground connection; The other end of the first resistance is connected with the emitter of the first phototriode, the positive pole of the second infrarede emitting diode respectively; The other end of the 3rd electric capacity is connected with the other end of the second resistance; The other end of the 4th electric capacity is connected with the negative pole of the second infrarede emitting diode, the base stage of the second phototriode respectively; The other end of the 5th electric capacity is connected with the emitter of the second phototriode, and the collector of the second phototriode is connected with the other end of the 3rd resistance, one end of the 8th electric capacity respectively through the 4th resistance; The other end of the 8th electric capacity is connected with the base stage of the 3rd phototriode; The other end of the 6th electric capacity is connected with the emitter of the 3rd phototriode.
2. a kind of simple and easy low rate of false alarm smoke alarm as claimed in claim 1, is characterized in that: described temperature controller adopts bimetallic strip Kick type temperature controller.
3. a kind of simple and easy low rate of false alarm smoke alarm as claimed in claim 2, is characterized in that: the concrete model of described bimetallic strip Kick type temperature controller is KSD301.
4. a kind of simple and easy low rate of false alarm smoke alarm as claimed in claim 1, is characterized in that: the concrete model of first, second infrarede emitting diode described is SE303 or PH303.
5. a kind of simple and easy low rate of false alarm smoke alarm as claimed in claim 1, is characterized in that: the concrete model of described first to fourth phototriode is PT5A850AC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510406599.3A CN105006094A (en) | 2015-07-13 | 2015-07-13 | Simple smoke alarm low in false alarm rate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510406599.3A CN105006094A (en) | 2015-07-13 | 2015-07-13 | Simple smoke alarm low in false alarm rate |
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| CN105006094A true CN105006094A (en) | 2015-10-28 |
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| CN201510406599.3A Pending CN105006094A (en) | 2015-07-13 | 2015-07-13 | Simple smoke alarm low in false alarm rate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115206049A (en) * | 2022-07-07 | 2022-10-18 | 山东华信消防工程有限公司 | Building fire control early warning ware |
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| CN2103836U (en) * | 1991-08-26 | 1992-05-06 | 张德益 | Electronic gas monitor |
| CN2304180Y (en) * | 1997-04-11 | 1999-01-13 | 四川消防机械总厂 | Temp.-determined type fire-disaster alarming detector |
| CN103473880A (en) * | 2013-09-23 | 2013-12-25 | 何林 | High-sensitivity smoke alarm |
| US20140240136A1 (en) * | 2009-03-20 | 2014-08-28 | Nest Labs, Inc. | Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms |
| CN104637250A (en) * | 2013-11-12 | 2015-05-20 | 成都万维图新信息技术有限公司 | Smoke and dust alarm |
-
2015
- 2015-07-13 CN CN201510406599.3A patent/CN105006094A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103836U (en) * | 1991-08-26 | 1992-05-06 | 张德益 | Electronic gas monitor |
| CN2304180Y (en) * | 1997-04-11 | 1999-01-13 | 四川消防机械总厂 | Temp.-determined type fire-disaster alarming detector |
| US20140240136A1 (en) * | 2009-03-20 | 2014-08-28 | Nest Labs, Inc. | Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms |
| CN103473880A (en) * | 2013-09-23 | 2013-12-25 | 何林 | High-sensitivity smoke alarm |
| CN104637250A (en) * | 2013-11-12 | 2015-05-20 | 成都万维图新信息技术有限公司 | Smoke and dust alarm |
Non-Patent Citations (1)
| Title |
|---|
| 蔡丽艳: ""住宅小区自动安全检测报警系统硬件介绍"", 《牡丹江师范学院学报（自然科学版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115206049A (en) * | 2022-07-07 | 2022-10-18 | 山东华信消防工程有限公司 | Building fire control early warning ware |
| CN115206049B (en) * | 2022-07-07 | 2023-08-25 | 智宇科技有限公司 | Building fire control early warning alarm |
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Application publication date: 20151028 |
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