CN209560673U - Spot-type photoelectric smoke detector circuit - Google Patents
Spot-type photoelectric smoke detector circuit Download PDFInfo
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- CN209560673U CN209560673U CN201920265692.0U CN201920265692U CN209560673U CN 209560673 U CN209560673 U CN 209560673U CN 201920265692 U CN201920265692 U CN 201920265692U CN 209560673 U CN209560673 U CN 209560673U
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- 239000000779 smoke Substances 0.000 title claims abstract description 26
- 238000012216 screening Methods 0.000 claims abstract description 5
- 238000005286 illumination Methods 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 230000003760 hair shine Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 24
- 230000000694 effects Effects 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to fire detector technical fields, it is intended to provide spot-type photoelectric smoke detector circuit, its key points of the technical solution are that including light-emitting component for issuing light source and one for receiving the photosensitive element with light frequency screening capacity of illumination, one end of the light-emitting component is connected with the converting unit for converting alternating current to direct current, the other end is connected with the control unit for receiving signal and output control signal, and the photosensitive element is connect through the power amplifier unit for amplifying output signal with described control unit.The utility model is suitable for fire alarm system.
Description
Technical field
The utility model relates to fire detector technical fields, more specifically, it relates to which spot-type photoelectric smoke is visited
Survey device circuit.
Background technique
Building up and using with a large amount of building, for ensureing that the automatic fire alarm system of the person and property safety seems
More and more necessary, component of the detector as fire alarm in automatic fire alarm system, effect is when fire will occur
Fire parameter such as smog, temperature etc. be converted to electric signal and carry out intellectual determination and be sent to judging result by transfer bus
Fire alarm control unit.
Detector can be divided into smoke detector, heat detector and flame detector three classes.
Point type optical smoke detector is typically designed as a labyrinth type smog detecting chamber, the inside design have a light source and
One photosensitive element, when normal, the light of light source cannot be generally irradiated on photosensitive element, but after having smog entrance, light
Scattering is generated in smog, is irradiated to some light on photosensitive element, smog is denseer, and light is more, and photosensitive element is again by light
Signal is converted to electric signal and is exported.
Point type optical smoke detector applies in general to restaurant, hotel, teaching building, computer room, communication machine room, does
The places such as the hall, bedroom, office stack room, the file store in public building, but there is a large amount of dust, water mist to be detained, it is possible to create corrosivity
Gas, it is possible to create steam and mist of oil, high altitude localities, the place etc. for having cigarette to be detained under normal circumstances should not select point-type light
Inductance smoke detector.
But existing spot-type photoelectric smoke detector circuit is easy false alarm often occurred by external disturbance
Situation, so that fire watch personnel endure puzzlement to the fullest extent, Effect on Detecting is bad.
Utility model content
The purpose of the utility model is to provide spot-type photoelectric smoke detector circuit, strong antijamming capability is not allowed
Vulnerable to external disturbance, the output signal of photosensitive element is amplified through power amplifier unit and is input in control unit, to reduce detector
There is the case where false alarm, Effect on Detecting is preferable.
The above-mentioned technical purpose of the utility model has the technical scheme that spot-type photoelectric smoke
Detector circuit, including for issuing light source light-emitting component and one for receive illumination with light frequency screening capacity
Photosensitive element, one end of the light-emitting component are connected with the converting unit for converting alternating current to direct current, and the other end connects
It is connected to the control unit for receiving signal and output control signal, the photosensitive element is through the power amplifier list for amplifying output signal
Member is connect with described control unit.
By using above-mentioned technical proposal, when there is smog generation, the light source of light-emitting component generates scattering through smog, makes portion
Light splitter is irradiated on photosensitive element, and photosensitive element converts light into electric signal again, and electric signal amplifies power amplifier unit and defeated
Enter to control unit, and then the strong antijamming capability of detector, it is not easy to by external disturbance, while result can be will test as transported
The information such as row state, smokescope and environmental parameter are sent to fire alarm control unit with digital signal form in real time, reduce and visit
It surveys device and the case where false alarm occurs, Effect on Detecting is preferable；Converting unit converts alternating current to direct current, to mention for light-emitting component
For operating voltage.
Preferably, the power amplifier unit includes several triodes, composite joint between several triodes, head end
The base stage of the triode T4 is connect with the photosensitive element, the collector and described control unit of the triode T7 of tail end
Connection.
By using above-mentioned technical proposal, several triodes carry out multistage amplification to the small-signal that photosensitive element exports
And be input to inside control unit, to improve sensitivity of the control unit to photosensitive element, it is conducive to control unit to fire condition
It is controlled.
Preferably, the photosensitive element is infrared ray photodiode L2.
By using above-mentioned technical proposal, a kind of high speed of infrared ray photodiode L2, high sensitive reception pipe, response
Time is fast, high sensitivity, the ability with light frequency screening, is converted to electric signal with the light for being emitted onto thereon and is input to control
It in unit processed, and then realizes and detector is avoided the purpose of false alarm occur, Effect on Detecting is preferable.
Preferably, the light-emitting component is infrared emission tube L3.
By using above-mentioned technical proposal, infrared emission tube L3 has the characteristics that high radiance, primarily serves transmitting
The effect of light source.
Preferably, the converting unit includes rectifier bridge DR1, and the input terminal of the rectifier bridge DR1 is connect with bus, output
End is connect through diode D1 and resistance R1 with the light-emitting component.
By using above-mentioned technical proposal, AC rectification is Rectified alternating current by rectifier bridge DR1, to realize alternating current
Be converted to the effect of direct current.
Preferably, described control unit is microcontroller IC1.
By using above-mentioned technical proposal, microcontroller IC1 has high-performance, low-power consumption and high efficiency of code execution etc. excellent
Point, it is easy to operate.
Preferably, described control unit is also connected with the display unit for showing detector working condition.
By using above-mentioned technical proposal, display unit is used to show the working condition of detector, in order to staff
The monitoring situation of detector is understood in real time.
Preferably, the display unit includes triode T3 and light emitting diode L1, the cathode of the light emitting diode L1
It being connect with the output end of the converting unit, the collector of the triode T3 is connect with the anode of the light emitting diode L1,
The base stage of the triode T3 is connect with described control unit.
By using above-mentioned technical proposal, control unit is acted through triode T3 driving light emitting diode L1, works as detector
When in monitored state, light emitting diode L1 is glittering；After detector experiences smog, light emitting diode L1 is always on, to play
Warning alert effect.
In conclusion the utility model has the following beneficial effects:
After fire generation smog occurring and smog enters in labyrinth type smoke detection room, light generates in smog to be dissipated
It penetrates, some light for emitting light-emitting component is irradiated on photosensitive element, and photosensitive element receives the optical signal of light-emitting component transmitting
And be converted to electric signal.
Faint electric signal simultaneously amplifies through power amplifier unit and exports to control unit, to improve control unit to photosensitive
The sensitivity of element.
The output result of photosensitive element is sent to fire alarm control unit with digital signal form by control unit in real time, into
And the strong antijamming capability of detector, it is not easy to by external disturbance, be reported by mistake with reducing spot-type photoelectric smoke detector
The Effect on Detecting of alert situation, spot-type photoelectric smoke detector is preferable.
Meanwhile control unit output control signal driving triode T3, triode T3 conducting, light emitting diode L1 are always on,
To play the role of warning alert；Usually, control unit provides signal source to light emitting diode L1, keeps light emitting diode L1 glittering,
And then staff can understand the monitoring situation of detector in real time.
Detailed description of the invention
Fig. 1 is the circuit connecting relation schematic diagram of converting unit and control unit；
Fig. 2 is light-emitting component, photosensitive element and control unit, the circuit connection diagram of display unit.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
It referring to Fig.1, is spot-type photoelectric smoke detector circuit disclosed by the utility model, including power supply module and control
Unit processed, control unit play control action, power supply module is used for as control unit etc. for receiving signal and output control signal
Operating voltage is provided.
Power supply module includes the converting unit for converting alternating current to direct current, and converting unit is rectifier bridge DR1, whole
The model MB10F of bridge DR1 is flowed, there are two input terminal and two output ends, two input terminals of rectifier bridge DR1 by rectifier bridge DR1
It is connect respectively with bus, the cathode output end of rectifier bridge DR1 is connected with diode D1, resistance R1 and resistance R2, diode D1, electricity
R1 and resistance R2 series connection is hindered, is connect through capacitor C1 with the cathode output end of rectifier bridge DR1 between diode D1 and resistance R1, is rectified
The cathode output end of bridge DR1 is grounded, and is grounded between resistance R1 and resistance R2 through capacitor C2 and capacitor C3, capacitor C2 and capacitor C3 are simultaneously
Connection, capacitor C2 are electrolytic capacitor, and the anode of electrolytic capacitor is connect with resistance R1.
Resistance R2 is in series with triode T1, and the collector of triode T1 is connect with resistance R2, and the base stage of triode T1 is through two
Pole pipe W1 is reversely grounded, and diode W1 is zener diode, so that the emitter of triode T1 exports burning voltage, triode T1
Base stage and triode T1 collector between be connected with resistance R3, the emitter of triode T1 connects 5V power supply, triode T1
Emitter be grounded through capacitor C5, capacitor C6 and capacitor C7, capacitor C5, capacitor C6 and capacitor C7 are in parallel.
Control unit is microcontroller IC1, and the model PIC12F675-I/SN of microcontroller IC1, microcontroller IC1 are total
There are Vdd pin, Vss pin, GP0/AN0 pin, GP1/CIN pin, GP2/AN2 pin, GP3 pin, GP4/AN3 pin, GP5
Pin and Vdd pin totally 8 pins, the emitter of the Vdd pin connecting triode T1 of microcontroller IC1, microcontroller IC1's
GP3 pin of the Vdd pin through resistance R4 connection microcontroller IC1, the Vss pin ground connection of controller IC 1.
Referring to Figures 1 and 2, the light-emitting component for issuing light source, light-emitting component are connected between resistance R1 and resistance R2
For infrared emission tube L3, the model IR383-41 of infrared emission tube L3, the emitter of triode T1 is connected with for connecing
The photosensitive element with light frequency screening capacity of illumination is received, photosensitive element is infrared ray photodiode L2, and infrared ray is photosensitive
The model PD333-3C/H0/L2 of diode L2, light-emitting component are that infrared emission tube L3 and infrared ray photodiode L2 is equal
In labyrinth type smog detecting chamber.
Referring to Fig. 2, the connection of infrared emission tube L3 forward direction is arranged and its anode is connected with triode T2, the collection of triode T2
Electrode is connect with infrared emission tube L3, and the base stage of infrared emission tube L3 is drawn through resistance R5 and the GP0/AN0 of microcontroller IC1
Foot connection, the emitter of infrared emission tube L3 are grounded through resistance R6, and the base stage of triode T2 is connected with diode D2 through forward direction,
Diode D2 is connect through resistance R7 with the GP5 pin of microcontroller IC1.
The cathode output end of rectifier bridge DR1 is grounded through light emitting diode L1 and triode T3, light emitting diode L1, triode
T3 and resistance R18 series connection and light emitting diode L1 Opposite direction connection is arranged, the both ends of light emitting diode L1 are parallel with resistance R17, and three
The collector of pole pipe T3 is connect with light emitting diode L1, and the emitter of triode T3 is grounded through resistance R18, microcontroller IC1's
GP5 pin is connect through resistance R20 with the base stage of triode T3, and one end of resistance R20 is grounded through capacitor C12, microcontroller IC1's
GP4/AN3 pin is connect through resistance R19 with the base stage of triode T3, the GP1/CIN pin of microcontroller IC1 through resistance R23 and
Capacitor C13 ground connection, resistance R23 are grounded through resistance 22, and resistance R23 is connect through resistance R21 with the cathode output end of rectifier bridge DR1,
Triode T3 and light emitting diode L1 forms display unit, for showing the working condition of detector.
The cathode of infrared ray photodiode L2 is connect through capacitor C8, resistance R8 and capacitor C9 with 5V power supply, capacitor C8, electricity
R8 and capacitor C9 series connection is hindered, triode T4, triode T5, triode are connected between infrared ray photodiode L2 and capacitor C8
T6 and triode T7, triode T4, triode T5, triode T6 and triode T7 are positive-negative-positive.
Triode T4, triode T5, triode T6 and triode T7 composite joint, the base stage of triode T4 is through resistance R10
It is connect with resistance R8, the base stage of triode T5 connect with the collector of triode T4 and is grounded through resistance R11, the base of triode T6
Pole connect with the collector of triode T5 and is grounded through resistance R12, and the base stage of triode T7 is connect with the collector of triode T6
And be grounded through resistance R13, the emitter of triode T4, triode T5 and triode T6 are all connected with 5V power supply, the hair of triode T7
Emitter-base bandgap grading connects 5V power supply with resistance R16 through resistance R15, and resistance R15 and resistance R16 are in parallel, and the both ends of resistance R16 are parallel with capacitor
Resistance R9, the current collection of triode T7 are connected with through resistance R10 between the base stage of C10, triode T4 and the collector of triode T6
Pole is grounded through resistance R14 and capacitor C11, and resistance R14 and capacitor C11 are in parallel, and the collector of triode T7 is with microcontroller IC1's
The connection of GP2/AN2 pin, triode T4, triode T5, triode T6 and triode T7 form power amplifier unit, with for will be photosensitive
The small-signal amplification of element output, improves sensitivity of the control unit to photosensitive element.
The implementation principle of the present embodiment are as follows: fire generates smog and smog enters in labyrinth type smoke detection room when occurring
Afterwards, light generates scattering in smog, and some light for emitting infrared emission tube L3 is irradiated to infrared ray photodiode
On L2, the optical signal of infrared ray photodiode L2 receiving infrared-ray transmitting tube L3 transmitting converts optical signals to electric signal, micro-
Weak electric signal simultaneously amplifies through power amplifier unit and exports to the GP2/AN2 pin of microcontroller IC1, to improve microcontroller
Sensitivity of the IC1 to infrared ray photodiode L2, microcontroller IC1 will test result and be sent in real time with digital signal form
Fire alarm control unit reduces spot-type photoelectric smoke detector and the case where false alarm occurs, and spot-type photoelectric smoke is visited
The Effect on Detecting for surveying device is preferable.
Meanwhile the GP5 pin output control signal of microcontroller IC1, with driving triode T3, triode T3 conducting, hair
Optical diode L1 is always on, to play the role of warning alert；Usually, the GP4/AN3 pin of microcontroller IC1 is to light emitting diode L1
Signal source is provided, keeps light emitting diode L1 glittering, and then staff can understand the monitoring situation of detector in real time.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (8)
1. spot-type photoelectric smoke detector circuit, including for issuing light source light-emitting component and one for receiving illumination
The photosensitive element with light frequency screening capacity, it is characterized in that: one end of the light-emitting component is connected with for by alternating current
The converting unit of direct current is converted to, the other end is connected with the control unit for receiving signal and output control signal, described photosensitive
Element is connect through the power amplifier unit for amplifying output signal with described control unit.
2. spot-type photoelectric smoke detector circuit according to claim 1, it is characterized in that: the power amplifier unit includes
Several triodes, composite joint between several triodes, the base stage and the photosensitive member of the triode T4 of head end
Part connection, the collector of the triode T7 of tail end are connect with described control unit.
3. spot-type photoelectric smoke detector circuit according to claim 1, it is characterized in that: the photosensitive element is red
Outside line photodiode L2.
4. spot-type photoelectric smoke detector circuit according to claim 1, it is characterized in that: the light-emitting component is red
Outside line transmitting tube L3.
5. spot-type photoelectric smoke detector circuit according to claim 1, it is characterized in that: the converting unit includes
Rectifier bridge DR1, the input terminal of the rectifier bridge DR1 are connect with bus, and output end shines through diode D1 and resistance R1 with described
Element connection.
6. spot-type photoelectric smoke detector circuit according to claim 1, it is characterized in that: described control unit is micro-
Controller IC 1.
7. spot-type photoelectric smoke detector circuit according to claim 1, it is characterized in that: described control unit also connects
It is connected to the display unit for showing detector working condition.
8. spot-type photoelectric smoke detector circuit according to claim 7, it is characterized in that: the display unit includes
Triode T3 and light emitting diode L1, the cathode of the light emitting diode L1 is connect with the output end of the converting unit, described
The collector of triode T3 is connect with the anode of the light emitting diode L1, the base stage and described control unit of the triode T3
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265692.0U CN209560673U (en) | 2019-03-01 | 2019-03-01 | Spot-type photoelectric smoke detector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265692.0U CN209560673U (en) | 2019-03-01 | 2019-03-01 | Spot-type photoelectric smoke detector circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209560673U true CN209560673U (en) | 2019-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920265692.0U Expired - Fee Related CN209560673U (en) | 2019-03-01 | 2019-03-01 | Spot-type photoelectric smoke detector circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209560673U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023206728A1 (en) * | 2022-04-27 | 2023-11-02 | 漳州松霖智能家居有限公司 | Infrared sensor and infrared sensing window |
-
2019
- 2019-03-01 CN CN201920265692.0U patent/CN209560673U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023206728A1 (en) * | 2022-04-27 | 2023-11-02 | 漳州松霖智能家居有限公司 | Infrared sensor and infrared sensing window |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191029 |
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| CF01 | Termination of patent right due to non-payment of annual fee |