CN208092906U - A kind of photoelectric smoke detector - Google Patents
A kind of photoelectric smoke detector Download PDFInfo
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- CN208092906U CN208092906U CN201820706435.1U CN201820706435U CN208092906U CN 208092906 U CN208092906 U CN 208092906U CN 201820706435 U CN201820706435 U CN 201820706435U CN 208092906 U CN208092906 U CN 208092906U
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- infrared
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- receiving tube
- transmitting tube
- smoke detector
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Abstract
The utility model discloses a kind of photoelectric smoke detectors, including optics labyrinth, main infrared transmitting tube and main infrared receiving tube, it further includes secondary infrared transmitting tube, secondary infrared receiving tube, infrared light-emitting diode driving circuit, operational amplification circuit and master controller, the main infrared transmitting tube, main infrared receiving tube, secondary infrared transmitting tube and secondary infrared receiving tube may be contained in optics labyrinth, the main infrared transmitting tube and secondary infrared transmitting tube are connect with infrared light-emitting diode driving circuit, main infrared receiving tube and secondary infrared receiving tube are connect with operational amplification circuit, the infrared light-emitting diode driving circuit and operational amplification circuit are connect with master controller.The utility model can monitor the malfunction of smoke detector, the infrared emission and reception pipe especially to play a key effect in detector automatically.
Description
Technical field
The utility model is related to detector technology fields, more specifically, more particularly to a kind of photoelectric smoke detector
Background technology
Smoke detector, 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, also has application in safety-protection system construction.Smoke detector mainly passes through prison
The concentration of smog is surveyed to realize fire disasters protection.
Smoke detector according to the type of sensor, is divided into：
1, ion smoke detector：It is in ionisation chamber contain a small amount of radioactive substance, can make ionization room air at
For conductor, allow to pass through in the air of a constant current between two electrodes, ray makes local air at ionized state, through voltage
Effect forms ion stream, this just gives one effective electric conductivity of ionisation chamber.When smoke particle enters ionization region, they due to
The electric conductivity of air is engaged and reduced with ion, forms the decrease of ion movement.When being less electrically conductive than predetermined value, detection
Device sends out alarm.
2, photoelectric smoke detector：It is using it is on fire when the smog that generates can change the propagation characteristic of light this is basic
Property and develop.Testing principle：Built-in there are one optics labyrinth in detector, the both sides in optics labyrinth are equipped with a pair of infrared hair
Penetrate pipe and reception pipe, the two pipe staggered installations, under normal circumstances infrared receiving tube do not receive tube-launched infrared light,
When having smog into fashionable, due to the scattering process of smoke particle, reception pipe is reflected to regard to some light, in reception pipe
Electric current is sensed, according to the comparison of faradic size and threshold value, so that it may to judge whether that smog alarm occurs.
The comparison of two kinds of sensors：Ionization-type smoke detector wants sensitive one for the induction of those small smoke particles
A bit, and photo-electric type smoke detector on the contrary, photo-electric type smoke detector for those slightly larger smoke particles induction compared with
It is sensitive, it is relatively good using photo-electric type smoke detector if the flue dust that fire generates all is bigger particle, and if
The flue dust that fire generates all is smaller particle, then relatively good using ionization-type smoke detector.But due to ionic formula
Contain radioactive substance in detector, once it leaks, it is harmful, gradually have the tendency that being substituted by photo-electric.Therefore
The utility model is directed to photoelectric smoke detector.
Existing photoelectric smoke detector is generally made of an optics labyrinth and a pair of of infrared emission and reception pipe.Knot
Structure as shown in Figure 1 (figure simply to illustrate that infrared emission and reception pipe light path figure, with the optics fan used in actual product
Palace has differences, and the optics labyrinth of actual use is unrelated with the utility model also comprising many shadings and reflective catch, here
Do not include).
The operation principle of existing smoke detector, as shown in Figure 1：Under normal circumstances, infrared transmitting tube A1 transmittings is infrared
Light covers region A, and infrared receiving tube K1 does not receive these infrared lights, but once has smog to enter region A, will
These infrared lights are carried out with the reflection of all directions, therefore, infrared receiving tube can receive part infrared transmitting tube K1 and be sent out
The infrared light penetrated, the smoke particle into the region is more, and the infrared light received is also more, therefore, can set one
Threshold value, when smog more to a certain degree when, be issued by smoke alarm.Its shortcoming is that：
Comparatively due to fire, the probability of generation is relatively low, thus smoke detector must accomplish it is highly stable reliable,
It neither reports by mistake, does not also fail to report, once reporting by mistake, fire department sets out the disaster relief, comes back after a vain attempt, waste of manpower financial resources, serious,
It may influence to succour true fire behavior；And once fail to report, then fire is not found in the primary stage of generation, and sprawlings is waited to open
Come, puts out that difficulty is big, and casualties and property loss also increase substantially.
Although current smoke detector has generally all done self-checking function, which substantially transports for master control borad
The detection of row state damages the master controller of master control borad, and the failures such as crash can detected, but if it is smog fan
In palace the infrared emission and reception pipe in face break down, and can not detected.Detecting infrared transmitting tube and reception pipe is
No failure can only artificially spray smoke detector a certain amount of smog by artificial, see whether it alarms to detect.
But the method for this artificial detection, due to expending too many manpower and materials, usually half a year or 1 year is detected it once, if
It breaks down in the interval smoke detector detected twice, and if fire by chance occurs at this time, consequence is hardly imaginable.
In conclusion using the smoke detector of prior art exploitation there are one more fatal disadvantage：It can not be timely
Know the fault condition of smoke detector critical component infrared emission and reception pipe, it is possible to cause accidentally to alert or fail to report police,
Stability and reliability is relatively poor.For this reason, it is necessary to develop a kind of completely new photoelectric smoke detector.
Utility model content
The purpose of this utility model is to provide a kind of photoelectric smoke detectors, to overcome lacking present in the prior art
It falls into.
In order to achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of photoelectric smoke detector, including optics labyrinth, main infrared transmitting tube and main infrared receiving tube further include
Secondary infrared transmitting tube, secondary infrared receiving tube, infrared light-emitting diode driving circuit, operational amplification circuit and master controller, it is described
Main infrared transmitting tube, main infrared receiving tube, secondary infrared transmitting tube and secondary infrared receiving tube may be contained in optics labyrinth, the master
Infrared transmitting tube and secondary infrared transmitting tube connects with infrared light-emitting diode driving circuit, main infrared receiving tube and pair is infrared connects
Closed tube is connect with operational amplification circuit, and the infrared light-emitting diode driving circuit and operational amplification circuit are and master controller
Connection.
Further, the secondary infrared transmitting tube and secondary infrared receiving tube are at least a pair.
Further, further include the alarm module being connect with master controller.
Further, further include the communication module being connect with master controller.
Further, further include the power module that working power is provided for the photoelectric smoke detector.
Compared with prior art, the utility model has the advantage of：
1, the utility model can monitor the malfunction of smoke detector automatically, and crucial work is especially played in detector
Infrared emission and reception pipe；
2, the utility model can realize automatic test, participated in without artificial, reduce maintenance cost；
3, the utility model can improve the stability and reliability of smoke detector entirety, avoid false alarm or fail to report
It is alert.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the schematic diagram of the photoelectric smoke detector of the prior art.
Fig. 2 is the labyrinth schematic diagram of photoelectric smoke detector described in the utility model.
Fig. 3 is the schematic diagram of photoelectric smoke detector described in the utility model.
Fig. 4 is the circuit diagram of infrared light-emitting diode driving circuit in photoelectric smoke detector described in the utility model.
Fig. 5 is the circuit diagram of operational amplification circuit in photoelectric smoke detector described in the utility model.
Fig. 6 is the work flow diagram of photoelectric smoke detector described in the utility model.
Specific implementation mode
The preferred embodiment of the utility model is described in detail below in conjunction with the accompanying drawings, so that the advantages of the utility model
It can be easier to be readily appreciated by one skilled in the art with feature, it is apparent clear to be made to the scope of protection of the utility model
Define.
As shown in fig.2, the design principle of the utility model is：On the basis of existing optics labyrinth, one is increased
To infrared transmitting tube A2 and infrared receiving tube K2.Placement location is as shown in Fig. 2, the Infrared irradiation model that infrared transmitting tube A2 is sent out
It encloses for region B, can just be irradiated to infrared receiving tube K1；And the position that infrared receiving tube K2 is placed is located at region A, just may be used
To receive the infrared light of infrared transmitting tube A1 transmittings.
When smoke detector works normally (non smoke enters state), infrared transmitting tube A1 emits infrared light, infrared hair
It penetrates pipe A2 to close, infrared receiving tube K1 does not receive infrared light at this time, and infrared receiving tube K2 can receive infrared light.Use this
Kind method, can be confirmed whether the working condition of infrared transmitting tube A1 and infrared receiving tube K2 are normal；When smoke detector is regular
When into self-test flow, infrared transmitting tube A1 is closed, and infrared transmitting tube A2 is opened, at this point, infrared receiving tube K1 can be received
Infrared light, and infrared receiving tube K2 does not receive infrared light, in this way, infrared transmitting tube A2 and infrared receiver can be confirmed
Whether the working condition of pipe K1 is normal.Above operating process can be accomplished with the working condition of fully validated 4 Primary Components
Moment keeps smoke detector working sensor in normal condition, avoids that announcement is accidentally alerted and leaked caused by sensor fault
It is alert；In addition, this being newly added also has another miscellaneous function to infrared transmitting tube A2 and infrared receiving tube K2：Work as normal work
When, K1 receives infrared light, at this point it is possible to infrared transmitting tube A2 and infrared receiving tube K2 are switched to normal mode of operation, i.e.,
Infrared transmitting tube A2 transmittings, infrared receiving tube K2 is received, if infrared receiving tube K2 can also receive infrared light, it was demonstrated that have really
Smog enters, and alarms again at this time, by this method, can will be filtered because of situations such as sporadic spatial electromagnetic interference
It removes, further avoids missing alarm.
Based on the design principle in the above smog labyrinth, the system principle diagram of smoke detector as shown in Figure 3 is designed.
A kind of photoelectric smoke detector, by optics labyrinth 101, main infrared transmitting tube 102, secondary infrared transmitting tube 103, red
UV light-emitting diode driving circuit 104, main infrared receiving tube 105, secondary infrared receiving tube 106, operational amplification circuit 107, master control
The compositions such as device 108 processed, communication module 109, power module 110.
Optics labyrinth 101：For installing major-minor infrared emission/reception pipe, and play the role of that external ambient light is isolated,
Meanwhile and smoke particle can allow for enter.
Main infrared transmitting tube 102：For work normally or detect secondary infrared receiving tube 106 it is whether normal when,
Emit infrared light；
Secondary infrared transmitting tube 103：For detecting, whether main infrared receiving tube 105 normal or auxiliary detection when having smoke alarm
Emit infrared light when smoke alarm state；
Infrared light-emitting diode driving circuit 104：According to the instruction of master controller 108, major and minor infrared transmitting tube is controlled
Transmitting and closing；
Main infrared receiving tube 105：For when there is smog to enter optics labyrinth receive smog transmitting infrared light or
Whether auxiliary detection 103 emission function of secondary infrared transmitting tube is normal；
Secondary infrared receiving tube 106：For examining 102 emission function of main infrared transmitting tube whether normal, or have smog into
It is fashionable, detect smoke alarm state as auxiliary；
Operational amplification circuit 107：Electric current and voltage for amplifying major-minor infrared receiving tube, the resolution ratio of Smoke Detection；
Master controller 108：It is the control centre of entire smoke detector, it is main to complete：One, major and minor infrared emission is controlled
The switch time of pipe；Two, control major-minor infrared receiving tube is by the voltage sample after operation amplifier；Three, it is answered according to different
With scene, the state of smoke detector is sent to communication module；
Communication module 109：The state that communication module is responsible for the detector for bringing master controller passes through wired or nothing
The mode of line sends local gateway or long-range Cloud Server to；
Alarm module 110：It is made of buzzer and its driving circuit, alarms for local；
Power module 111：For giving above-mentioned all modules to provide power supply.
Main infrared transmitting tube 102, secondary infrared transmitting tube 103, main infrared receiving tube 105, secondary infrared receiving tube 106 are respectively provided with
In optics labyrinth 101, main infrared transmitting tube 102 and secondary infrared transmitting tube 103 with infrared light-emitting diode driving circuit 104
Connection, main infrared receiving tube 105 and secondary infrared receiving tube 106 are connect with operational amplification circuit 107, and infrared light-emitting diode drives
Dynamic circuit 104, communication module 109, alarm module 110 and operational amplification circuit 107 are connect with master controller 108.
In the present embodiment, optics labyrinth 101 is according to the spy of the design principle combination the utility model in general optics labyrinth
Point die sinking makes, and major and minor infrared transmitting tube model IR333, the model PD438B of major and minor infrared receiving tube can also roots
According to needing to select other models.
In the present embodiment, the model SWM180 of the master controller 108 can also select its alloytype as needed
Number.
In the present embodiment, the communication module 109 can select CAN bus as needed according to different applications
(TJA1050), ZigBee (CC2530), bluetooth (CC2541), GPRS (G16) or NB-IoT (MN2).
In the present embodiment, the alarm module 110 can be honey device or loudspeaker.
As shown in fig.4, for the circuit diagram of infrared light-emitting diode driving circuit 104 in the utility model, work is former
Reason is：Master controller is master/slave red to control by PB1/PB3 pins control triode Q4/Q5 (MMBT3904) on and off
Outer transmitting tube D4/D6 (IR333's) opens or closes.
As shown in fig.5, for the circuit diagram of operational amplification circuit 107 in the utility model, its working principle is that：Due to red
After outer reception pipe receives infrared light, induced current is very faint, can not directly be collected with the ADC of master controller, so
It needs to amplify the induced current using amplifier, to meet the sampled level of master controller ADC.Fig. 5 utilizes two stage amplifer
(TP1542A), the ADC interface of master controller will be given after the amplification of the induced current of PD438B, while master controller passes through
PB2/PB4 feet control master/slave infrared transmitting tube and its switch of amplifier respectively.
In conjunction with shown in Fig. 6, the workflow of smoke detector is described below in detail：After smoke detector powers on, master control
Device 108 processed controls red in period regular time (the different periods is arranged according to different working environment and testing requirements)
UV light-emitting diode driving circuit 104 opens main infrared transmitting tube 102, closes secondary infrared transmitting tube 103, while it is infrared to open master
The ADC sampling switch of reception pipe 105 and secondary infrared receiving tube 106, if the ADC sampled results of master controller 108 are at this time：
1, main infrared receiving tube 105 is not received by infrared light, and secondary infrared receiving tube 106 receives infrared light, then
It was determined that non smoke enters optics labyrinth 101, i.e., no smoke alarm, and 102 function of main infrared transmitting tube is normal.
2, main infrared receiving tube 105 is not received by infrared light, and secondary infrared receiving tube 106 is also not received by infrared light,
So it was determined that main infrared transmitting tube 102, main infrared receiving tube 105, secondary infrared receiving tube 106 at least one be out of order,
At this point, 108 sending device fault message of master controller notifies management staff, equipment to be out of order to communication module 109, remind
Maintenance or more exchange device in time.
3, main infrared receiving tube 105 receives infrared light, and secondary infrared receiving tube 106 also receives infrared light, then
It was determined that there is smog to enter optics labyrinth 101, that is, there is smoke alarm；And it can determine that main infrared transmitting tube 102, master are red
Outer reception pipe 105, secondary infrared receiving tube 106 are working properly；At this point, master controller 108 controls infrared light-emitting diode drive at once
Dynamic circuit 104 opens secondary infrared transmitting tube 103, main infrared transmitting tube 102 is closed, if main infrared receiving tube 105 and pair are red at this time
Outer reception pipe 106 receives infrared light, then can further confirm that, has smog to enter optics labyrinth 101, that is, has smog announcement
It is alert, smoke alarm is all detected by major-minor infrared tube, by step as above continuously monitoring 3 times, if still remaining smog
Alarm can then exclude to be due to alarm caused by interference substantially, and smoke alarm information is sent to logical by master controller 108 at this time
Believe module 109, notifies that there is smoke alarm in the region to management staff, Disaster Relief Measures need to be organized at once.
4, in normal working conditions, if the self-test time to (such as a hour or 1 day, according to practical application of setting
Scene settings), secondary infrared transmitting tube 103 is opened, main infrared transmitting tube 102 is closed, if main infrared receiving tube 105 can receive
To infrared light, then may determine that secondary infrared transmitting tube 103 is normal, main infrared receiving tube 105 is also normal, and self-test is completed；If
Secondary infrared receiving tube 105 does not receive infrared light, then 103 failure of secondary infrared transmitting tube or main infrared receiving tube can be determined
105 failures, at this time main infrared controller 108 send fault warning at once to communication module 109, the faulty alarm in notice backstage,
It need to overhaul in time or more exchange device.
The utility model can detect the malfunction of smoke detector, especially detector by above design automatically
In the malfunction of infrared transmitting tube and infrared receiving tube that plays a key effect, it is possible to prevente effectively from due to infrared transmitting tube and
False alarm caused by reception pipe failure fails to report police, since smoke detector has the function of automatic self, is participated in without artificial, because
This, can accomplish that self-test even per minute is primary per hour as needed, when single smoke detector breaks down, when can be with first
Between notice operation maintenance personnel more exchange device in time, be truly realized and control fire incident among cradle.
Communication module 109 and alarm module 110 can be matched according to different applications, for the application networked of needs,
The two can all be selected, as long as or communication module 109, if it is free-standing cigarette sense, it is only necessary to alarm module 110.
Although being described in conjunction with the accompanying the embodiment of the utility model, patent owner can want in appended right
Various deformations or amendments are made within the scope of asking, and model is protected as long as described no more than the claim of the utility model
It encloses, should all be within the protection scope of the utility model.
Claims (5)
1. a kind of photoelectric smoke detector, including optics labyrinth, main infrared transmitting tube and main infrared receiving tube, feature exist
In further including secondary infrared transmitting tube, secondary infrared receiving tube, infrared light-emitting diode driving circuit, operational amplification circuit and master control
Device processed, the main infrared transmitting tube, main infrared receiving tube, secondary infrared transmitting tube and secondary infrared receiving tube may be contained within optics labyrinth
Interior, the main infrared transmitting tube and secondary infrared transmitting tube are connect with infrared light-emitting diode driving circuit, main infrared receiving tube
It is connect with operational amplification circuit with secondary infrared receiving tube, the infrared light-emitting diode driving circuit and operational amplification circuit are equal
It is connect with master controller.
2. photoelectric smoke detector according to claim 1, which is characterized in that the pair infrared transmitting tube and pair are infrared
Reception pipe is at least a pair.
3. photoelectric smoke detector according to claim 1, which is characterized in that further include the report being connect with master controller
Alert module.
4. photoelectric smoke detector according to claim 1, which is characterized in that further include connect with master controller it is logical
Believe module.
5. photoelectric smoke detector according to claim 1, which is characterized in that further include for the photo-electric smoke detection
Device provides the power module of working power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820706435.1U CN208092906U (en) | 2018-05-14 | 2018-05-14 | A kind of photoelectric smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820706435.1U CN208092906U (en) | 2018-05-14 | 2018-05-14 | A kind of photoelectric smoke detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208092906U true CN208092906U (en) | 2018-11-13 |
Family
ID=64052245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820706435.1U Active CN208092906U (en) | 2018-05-14 | 2018-05-14 | A kind of photoelectric smoke detector |
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| Country | Link |
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| CN (1) | CN208092906U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113519017A (en) * | 2019-03-19 | 2021-10-19 | 能美防灾株式会社 | Smoke detector |
| US11506586B2 (en) | 2020-08-17 | 2022-11-22 | Carrier Corporation | Photoelectric smoke sensor tube |
-
2018
- 2018-05-14 CN CN201820706435.1U patent/CN208092906U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113519017A (en) * | 2019-03-19 | 2021-10-19 | 能美防灾株式会社 | Smoke detector |
| US11506586B2 (en) | 2020-08-17 | 2022-11-22 | Carrier Corporation | Photoelectric smoke sensor tube |
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