CN206421541U - A kind of free-standing photoelectric smoke alarm - Google Patents
A kind of free-standing photoelectric smoke alarm Download PDFInfo
- Publication number
- CN206421541U CN206421541U CN201720096731.XU CN201720096731U CN206421541U CN 206421541 U CN206421541 U CN 206421541U CN 201720096731 U CN201720096731 U CN 201720096731U CN 206421541 U CN206421541 U CN 206421541U
- Authority
- CN
- China
- Prior art keywords
- alarm
- housing case
- infrared
- smog
- processing unit
- 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.)
- Expired - Fee Related
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 abstract description 36
- 238000009792 diffusion process Methods 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
Abstract
The utility model discloses a kind of free-standing photoelectric smoke alarm, it is externally provided with multi-stage annular vertical riser formula for detection chamber, housing case inside housing case and enters cigarette structure, that enters cigarette structure is provided with double through hole；Alarm is provided with detection cavity room, alarm includes signal processing unit, infrared transmitting tube, infrared receiving tube, in addition to indicator lamp and loudspeaker, and infrared transmitting tube, infrared receiving tube, indicator lamp and loudspeaker are connected to signal processing unit.The innovation structure of the utility model staged facet and double through hole, can be achieved the rapid diffusion to non-standing smog.By gathering smoke particle number and light scatter intensity, smokescope and particle size are judged, concentration threshold setting is carried out to smog, more effectively the fire alarm factor such as continuation smog responded, it is to avoid wrong report.
Description
Technical field
The utility model is related to fire safety protecting field, more particularly to a kind of free-standing photoelectric smoke alarm.
Background technology
Free-standing photoelectric smoke alarm has anti-interference in air flow, working stability, environment temperature and humidity change pair
It influences small, the features such as sensitive to the response of canescence and the larger cigarette that glows of particle, and simple in construction, easy for installation, cost
It is cheap, it is widely used in common furniture construction, Step section, hotel, compact entertainment place and processing factory etc..
Main sensor cluster (transmitting tube, the reception by detection smoke particle of free-standing photoelectric smoke alarm
Pipe), carry out signal transacting wiring board, provide the sound indicate buzzer, provide light indicate indicator lamp and power supply battery
Device is constituted.After smoke particle enters photoelectricity labyrinth, scattering is produced to infrared emission light, scattered light is connect by photodiode
Receive, and then produce faint photoelectric current.Photoelectric current is converted and amplifying circuit processing after, obtain photo-current intensity and smokescope it
Between relation.The sensitivity of alarm is adjusted by setting alarm threshold value.Wherein, to entering the smokescope response in labyrinth not
Easy to control, such as low concentration smog residence time is long, is vulnerable to the influence of noncontinuity smog and produces wrong report.Meanwhile, pass through
Photo-current intensity judges the type of smoke particle and analysis obtains accurate smokescope, and then determines smoke density threshold value
It is difficult.
At present, most of photoelectric smoke alarms enter the parameters such as smokescope, the smoke particle size of alarm
Judge inaccurate or be not identified, cause low concentration smog interference wrong report and dust granules interference wrong report, greatly reduce report
The sensitivity of alert device.
Utility model content
The purpose of this utility model, which is that design is a kind of, solves low concentration smog and dust granules interference wrong report, dependable performance
Fire-alarm.
To realize above-mentioned utility model purpose, the technical solution of the utility model is：A kind of free-standing photoelectric smoke
It is detection chamber inside alarm, including taper type housing case, housing case, housing case outer cone inclined-plane is provided with multistage
Annular vertical staged enters cigarette structure, enters and equally distributed double through hole is offered on the vertical cascaded surface of cigarette structure, double logical
Hole is through housing case connection detection chamber；
Alarm is provided with the detection cavity room, alarm is arranged on the bottom surface of housing case, and alarm is included at signal
Unit is managed, the signal processing unit includes using low-power consumption and carries the chip of operational amplifier function；Alarm is also included along same
Infrared transmitting tube and infrared receiving tube that the radial direction angle of covering of the fan is set, infrared receiving tube receive infrared transmitting tube transmitting through cigarette
The infrared ray of mist particle scattering；Alarm also includes indicator lamp and loudspeaker；The infrared transmitting tube, infrared receiving tube, indicator lamp
Signal processing unit is connected to loudspeaker.
The beneficial effects of the utility model are：
The innovation structure of the utility model staged facet and double through hole, can be achieved the rapid expansion to non-standing smog
Dissipate.By gathering smoke particle number and light scatter intensity, smokescope and particle size are judged, carrying out concentration threshold to smog sets
It is fixed, more effectively the fire alarm factor such as continuation smog is responded, it is to avoid wrong report.
Brief description of the drawings
Fig. 1 is the structural representation of housing case 1 of the present utility model；
Fig. 2 is the structural representation of alarm 2 of the present utility model；
Fig. 3 is light scatter intensity detects schematic diagram of the present utility model.
Embodiment
The technical scheme in the utility model embodiment is clearly and completely described below in conjunction with accompanying drawing.
As shown in Figure 1, 2, a kind of free-standing photoelectric smoke alarm, including taper type housing case 1, housing case
1 inside is detection chamber (not shown), and the outer cone inclined-plane of housing case 1 enters cigarette knot provided with multi-stage annular vertical riser formula
Structure 101, enters and equally distributed double through hole 103 is offered on the vertical cascaded surface 102 of cigarette structure 101, and double through hole 103 runs through
Housing case connection detection chamber, it is to be beneficial to low concentration smog that staged, which enters cigarette structure 101 and the main function of double through hole 103,
Rapidly enter and diffuse into detection chamber.
Alarm 2 is provided with the detection cavity room, alarm 2 is arranged on the bottom surface of housing case 1, and alarm 2 includes letter
Number processing unit 201, the signal processing unit 201 includes using low-power consumption and carries the chip of operational amplifier function and (do not show in figure
Go out).Alarm also includes indicator lamp 204 and loudspeaker 205.
Alarm 2 also includes the infrared receiving tube for being used to launch ultrared infrared transmitting tube 202 and receiving infrared-ray
203, as shown in figure 3, the radial direction angle theta of infrared transmitting tube 202 and infrared receiving tube 203 along same covering of the fan is set, the present embodiment
Middle θ takes 135 °.Infrared receiving tube 202 receives the infrared ray scattered through smoke particle of the transmitting of infrared transmitting tube 203.
The infrared transmitting tube 202, infrared receiving tube 203, indicator lamp 204 and loudspeaker 205 are connected to signal transacting list
Member 201.
The utility model stand alone type photoelectric smoke alarm, is examined by infrared transmitting tube 202, infrared receiving tube 203
Smoke particle number and light scatter intensity are surveyed, signal processing unit 201 carries out analysis and calculates to judge smokescope and particle size,
Threshold is determined, judges whether occur fire with this, and warning is sent by indicator lamp and loudspeaker.Based on smoke particle number and time
Relation principle determine smokescope, and the principle that respond to light scatter intensity of different sized particles particle diameters distinguish dust and
Smoke particle, further improves the sensitivity of alarm.
Wherein, signal processing unit determines smokescope by the functional relation of smoke particle Particle density and time.It is first
First, according to testing result, the functional relation of smoke particle Particle density and time is set up, is then converted to by signal processing unit
Relation between smokescope and pulse amplitude.
Decay because the dynamic changing process of smoke particle concentration is increased rapidly to after maximum from 0 and gradually, i.e., at certain
Individual t smoke particle concentration is up to peak value.Therefore, smokescope and the relation of time are passed through a piecewise function by us
Represent：
In formula (1)：n0It is the maximum of smokescope, b can reflect the speed degree that smokescope changes with time t, t0Table
Show that smoke particle concentration reaches the peak value corresponding time.
Wherein, based on light scattering theory, signal processing unit determines particle size by scattering strength function.According to Mie
Light scattering theory, incident light is irradiated to after smoke particle, and its scattered light intensity I is：
In formula (2), λ is incidence wave wavelength, and R is receiving point to the distance of scattering particles, i1(θ)、i2(θ) is scattering strength
Function.Set up i1(θ)、i2Relation between (θ) and particle size r, can obtain the scattering strength function under different r changes.Demodulation
To smokescope.By parameter setting, threshold value is adjusted, the smoke particle response of setting value is only reached to particle diameter, more than setting value
Smoke particle be not responding to, smoke particle of the particle size in setting value or so can be distinguished, signal in the pickup unit interval
Distribution Value, by the method for probability statistics, according to Malenkov criterion, by software dynamic calculation, finally, obtain finite concentration and
The corresponding threshold signal of particle diameter smoke particle reduces interference of the dust to alarm so as to distinguish dust and smoke particle.
Described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.Based on this
Embodiment in utility model, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of the utility model protection.
Claims (1)
1. a kind of free-standing photoelectric smoke alarm, it is characterised in that including taper type housing case, inside housing case
For detection chamber, housing case outer cone inclined-plane enters cigarette structure provided with multi-stage annular vertical riser formula, enters the vertical of cigarette structure
Equally distributed double through hole is offered on cascaded surface, double through hole is through housing case connection detection chamber；
Alarm is provided with the detection cavity room, alarm is arranged on the bottom surface of housing case, and alarm includes signal transacting list
Member, the signal processing unit includes using low-power consumption and carries the chip of operational amplifier function；Alarm is also included along same covering of the fan
Radial direction angle set infrared transmitting tube and infrared receiving tube, infrared receiving tube receive infrared transmitting tube transmitting through smog
The infrared ray of grain scattering；Alarm also includes indicator lamp and loudspeaker；The infrared transmitting tube, infrared receiving tube, indicator lamp and loudspeaker
Be connected to signal processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720096731.XU CN206421541U (en) | 2017-01-25 | 2017-01-25 | A kind of free-standing photoelectric smoke alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720096731.XU CN206421541U (en) | 2017-01-25 | 2017-01-25 | A kind of free-standing photoelectric smoke alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206421541U true CN206421541U (en) | 2017-08-18 |
Family
ID=59570765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720096731.XU Expired - Fee Related CN206421541U (en) | 2017-01-25 | 2017-01-25 | A kind of free-standing photoelectric smoke alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206421541U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710127A (en) * | 2017-01-25 | 2017-05-24 | 福建工程学院 | Independent type photoelectric smoke sensing fire alarm device and working method |
| CN110070691A (en) * | 2018-01-24 | 2019-07-30 | 上海云杉信息科技有限公司 | A kind of smog alarm method and system, storage medium and terminal |
-
2017
- 2017-01-25 CN CN201720096731.XU patent/CN206421541U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710127A (en) * | 2017-01-25 | 2017-05-24 | 福建工程学院 | Independent type photoelectric smoke sensing fire alarm device and working method |
| CN110070691A (en) * | 2018-01-24 | 2019-07-30 | 上海云杉信息科技有限公司 | A kind of smog alarm method and system, storage medium and terminal |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190729 Granted publication date: 20170818 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220729 Granted publication date: 20170818 |
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| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 |
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| CF01 | Termination of patent right due to non-payment of annual fee |