CN108645818A - A kind of photoelectric smoke sensor - Google Patents
A kind of photoelectric smoke sensor Download PDFInfo
- Publication number
- CN108645818A CN108645818A CN201810453357.3A CN201810453357A CN108645818A CN 108645818 A CN108645818 A CN 108645818A CN 201810453357 A CN201810453357 A CN 201810453357A CN 108645818 A CN108645818 A CN 108645818A
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- CN
- China
- Prior art keywords
- infrared
- tube
- receiving tube
- main
- infrared receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
Abstract
The invention discloses a kind of photoelectric smoke sensors, including optics labyrinth, main infrared transmitting tube and main infrared receiving tube, it further includes secondary infrared transmitting tube and secondary infrared receiving tube, 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 pair infrared receiving tube is corresponding with the region that main infrared transmitting tube emits, and the main infrared receiving tube is corresponding with the secondary region of infrared transmitting tube transmitting.The present invention can monitor the malfunction of smoke sensor device, the infrared emission and reception pipe especially to play a key effect in sensor automatically.
Description
Technical field
The present invention relates to detector technology fields, more specifically, more particularly to a kind of photoelectric smoke sensor.
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 present invention is directed photoelectric smoke sensor.
Existing photoelectric smoke sensor 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 to the invention also comprising many shadings and reflective catch, does not have here
Including).
The operation principle of existing smoke detector is 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 sensor.
Invention content
The purpose of the present invention is to provide a kind of photoelectric smoke sensors, to overcome the defect present in the prior art.
In order to achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of photoelectric smoke sensor, including optics labyrinth, main infrared transmitting tube and main infrared receiving tube, further include pair
Infrared transmitting tube and secondary infrared receiving tube, the main infrared transmitting tube, main infrared receiving tube, secondary infrared transmitting tube and secondary infrared connect
Closed tube may be contained in optics labyrinth, and the pair infrared receiving tube is corresponding with the region that main infrared transmitting tube emits, the master
Infrared receiving tube is corresponding with the secondary region of infrared transmitting tube transmitting.
Further, the secondary infrared transmitting tube and secondary infrared receiving tube are at least a pair.
Compared with the prior art, the advantages of the present invention are as follows：
1, implementation of the invention can monitor the malfunction of smoke detector automatically, especially play key in detector
The infrared emission and reception pipe of effect；
2, automatic test can be achieved in the present invention, is participated in without artificial, reduces maintenance cost；
3, the present invention can improve the stability and reliability of smoke detector entirety, avoid false alarm or fail to report police.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the schematic diagram of the photoelectric smoke sensor of the prior art.
Fig. 2 is the schematic diagram of photoelectric smoke sensor of the present invention.
Specific implementation mode
The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
As shown in fig.2, the present invention provides a kind of photoelectric smoke sensor, including optics labyrinth, main infrared transmitting tube
A1 and main infrared receiving tube K1, which is characterized in that further include secondary infrared transmitting tube A2 and secondary infrared receiving tube K2, the master is infrared
Transmitting tube A1, main infrared receiving tube K1, pair infrared transmitting tube A2 and pair infrared receiving tube K2 may be contained in optics labyrinth, described
Secondary infrared receiving tube K2 is corresponding with the region that main infrared transmitting tube A1 emits, the main infrared receiving tube K1 and secondary infrared emission
The region of pipe A2 transmittings is corresponding.
The design principle of the present embodiment is：On the basis of existing optics labyrinth, a pair of secondary infrared transmitting tube is increased
A2 and secondary infrared receiving tube K2.Placement location is as shown in Fig. 2, the Infrared irradiation ranging from region that pair infrared transmitting tube A2 is sent out
B can just be irradiated to main infrared receiving tube K1；And the position that secondary infrared receiving tube K2 is placed is located at region A, can just connect
The infrared light emitted by main infrared transmitting tube A1.
It is main when being worked normally using the smoke detector of the present invention (non smoke enters state) based on above structure
Infrared transmitting tube A1 emits infrared light, and secondary infrared transmitting tube A2 is closed, and main infrared receiving tube K1 does not receive infrared light at this time, and
Secondary infrared receiving tube K2 can receive infrared light.In this way, main infrared transmitting tube A1 and secondary infrared receiver can be confirmed
Whether the working condition of pipe K2 is normal；When smoke detector is periodically into self-test flow, main infrared transmitting tube A1 is closed, and secondary
Infrared transmitting tube A2 is opened, at this point, main infrared receiving tube K1 can receive infrared light, and pair infrared receiving tube K2 do not receive it is red
Outer light can be confirmed whether the working condition of secondary infrared transmitting tube A2 and main infrared receiving tube K1 are normal in this way.More than
Operating process, can accomplish to keep smoke detector working sensor constantly with the working condition of fully validated 4 Primary Components
In normal condition, avoid that alarm is accidentally alerted and leaked caused by sensor fault.
This being added of the invention also has another miscellaneous function to secondary infrared transmitting tube A2 and pair infrared receiving tube K2：
When working properly, main infrared receiving tube K1 receives infrared light, at this point it is possible to by secondary infrared transmitting tube A2 and secondary infrared receiver
Pipe K2 is switched to normal mode of operation, i.e., secondary infrared transmitting tube A2 transmittings, secondary infrared receiving tube K2 is received, if secondary infrared receiver
Pipe K2 can also receive infrared light, it was demonstrated that and there is smog entrance really, alarms again at this time, it by this method, can will be by
It is filtered out in situations such as sporadic spatial electromagnetic interference, further avoids missing alarm.
The present invention can detect the malfunction of smoke detector automatically, and what is especially played a key effect in detector is red
The malfunction of outer transmitting and reception pipe, it is possible to prevente effectively from false alarm or leakage caused by infrared emission and reception pipe failure
Alarm participates in without artificial, therefore, can as needed accomplish per hour since smoke detector has the function of automatic self
Even self-test per minute is primary, when single smoke detector breaks down, can notify operation maintenance personnel is replaced in time to set at the first time
It is standby, it is truly realized and controls fire incident among cradle.
Although the embodiments of the invention are described in conjunction with the attached drawings, but patent owner can be in appended claims
Within the scope of make various deformations or amendments, as long as it does not exceed the scope of protection described in the claims to the invention, all should
Within protection scope of the present invention.
Claims (2)
1. a kind of photoelectric smoke sensor, including optics labyrinth, main infrared transmitting tube and main infrared receiving tube, feature exist
In further including secondary infrared transmitting tube and secondary infrared receiving tube, the main infrared transmitting tube, main infrared receiving tube, secondary infrared emission
Pipe and secondary infrared receiving tube may be contained in optics labyrinth, the region phase that the pair infrared receiving tube emits with main infrared transmitting tube
Corresponding, the main infrared receiving tube is corresponding with the secondary region of infrared transmitting tube transmitting.
2. photoelectric smoke sensor 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810453357.3A CN108645818A (en) | 2018-05-14 | 2018-05-14 | A kind of photoelectric smoke sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810453357.3A CN108645818A (en) | 2018-05-14 | 2018-05-14 | A kind of photoelectric smoke sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108645818A true CN108645818A (en) | 2018-10-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810453357.3A Pending CN108645818A (en) | 2018-05-14 | 2018-05-14 | A kind of photoelectric smoke sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN108645818A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110796822A (en) * | 2019-09-15 | 2020-02-14 | 杭州拓深科技有限公司 | Method for prejudging fire point direction based on improved smoke alarm |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789671A (en) * | 2012-06-21 | 2012-11-21 | 扬州市扬子通讯器材有限公司 | Maintenance-free photoelectric type smoke detector and test process thereof |
-
2018
- 2018-05-14 CN CN201810453357.3A patent/CN108645818A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789671A (en) * | 2012-06-21 | 2012-11-21 | 扬州市扬子通讯器材有限公司 | Maintenance-free photoelectric type smoke detector and test process thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110796822A (en) * | 2019-09-15 | 2020-02-14 | 杭州拓深科技有限公司 | Method for prejudging fire point direction based on improved smoke alarm |
| CN110796822B (en) * | 2019-09-15 | 2021-07-20 | 杭州拓深科技有限公司 | Method for prejudging fire point direction based on improved smoke alarm |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20181012 |