CN201600326U - Laser sampling smoke detecting chamber - Google Patents
Laser sampling smoke detecting chamber Download PDFInfo
- Publication number
- CN201600326U CN201600326U CN2009202449414U CN200920244941U CN201600326U CN 201600326 U CN201600326 U CN 201600326U CN 2009202449414 U CN2009202449414 U CN 2009202449414U CN 200920244941 U CN200920244941 U CN 200920244941U CN 201600326 U CN201600326 U CN 201600326U
- Authority
- CN
- China
- Prior art keywords
- chamber
- power valve
- receiving tube
- smoke detection
- sampling smoke
- 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 - Lifetime
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a laser sampling smoke detecting chamber which comprises a transmitting tube and a receiving tube. A light absorption chamber for absorbing light rays transmitted by the transmitting tube is arranged in the direction of a coaxial line of the transmitting tube; a lens and an optical grate are arranged at the front end of the transmitting tube between the transmitting tube and the light absorption chamber in sequence; a light gathering cup is arranged at the rear end of the receiving tube; and a connecting line between the transmitting tube and the light absorption chamber is crossed with an extended line of the receiving tube. The laser sampling smoke detecting chamber has the advantages of simple structure and high detection precision, can eliminate the problem in the traditional smoke detecting chamber that more stray light is received by the receiving tube.
Description
Technical field
The utility model relates to the sniffer technical field, relates in particular to a kind of laser sampling smoke detection chamber.
Background technology
At present, traditional laser sampling smoke detection chamber is that portion is provided with a light source and sensor within it, and the two becomes an angle of 90 degrees to place.Under normal circumstances, the light that light source sends can directly penetrate from power valve, and without sensor; But when smog entered cavity, smoke particles can make light scatter, and a part of light can be mapped on the sensor, and at this moment, sensor can trigger corresponding warning circuit and provide alerting signal.Adopt the detecting chamber of this structure in use to have following shortcoming: because the light that light source sends contains spuious hot spot, it directly enters accuracy and sensitivity that receiving tube can influence smoke detection, causes detection accuracy inaccurate.
The utility model content
The purpose of this utility model is at above-mentioned deficiency of the prior art, and a kind of laser sampling smoke detection chamber is provided, and it is simple in structure, the detection accuracy height, and can eliminate the problem that has more parasitic light to be received the pipe reception in traditional smog detecting chamber.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of laser sampling smoke detection chamber, comprise power valve and receiving tube, it is characterized in that: described power valve coaxial cable direction is provided with in order to absorb the extinction chamber of the light emitted line of power valve, and the front end of power valve is disposed with lens and grating between described power valve and extinction chamber, and the rear end of described receiving tube is provided with prefocus cup; The connecting line between described power valve and the extinction chamber and the extended line of receiving tube intersect.
Angle between described power valve and the receiving tube is 120 °～150 °.
Described extinction chamber be shaped as black matt band saw tooth.
Described receiving tube be shaped as trumpet type.
Described prefocus cup surface scribbles equally distributed copper layer, nickel dam and chromium layer from outside to inside successively.
The light source that described power valve adopts is a LASER Light Source.
The utility model compared with prior art has the following advantages:
1, simple in structure and reasonable in design, the darkroom design is adopted in the smoke detection chamber, the front end of power valve is disposed with collector lens and filters grating between power valve and extinction chamber, and power valve and receiving tube adopt 120～150 degree angle arrangements, make stability of light source and consistance be greatly improved, having solved has more parasitic light to be received the problem that pipe receives in traditional smog detecting chamber.
2, detection accuracy height is provided with prefocus cup by the rear end at receiving tube, and it can fully converge the light that smoke particle launches and reflect, thereby has greatly improved the absorptivity of receiving tube to light, and then has improved detection sensitivity greatly.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Description of reference numerals:
The 1-power valve; The 2-receiving tube; 3-extinction chamber;
The 4-lens; The 5-grating; The 6-prefocus cup.
Embodiment
As shown in Figure 1, the utility model laser sampling smoke detection chamber, comprise power valve 1 and receiving tube 2, described power valve 1 coaxial cable direction is provided with in order to absorb the extinction chamber 3 of power valve 1 light emitted line, and the front end of power valve 1 is disposed with lens 4 and grating 5 between described power valve 1 and extinction chamber 3, and the rear end of described receiving tube 2 is provided with prefocus cup 6; The connecting line between described power valve 1 and the extinction chamber 3 and the extended line of receiving tube 2 intersect.
In the present embodiment, the darkroom design is adopted in the smoke detection chamber, and the whole light absorbent that adopts of detecting chamber makes light have extremely low emissivity on the detecting chamber inwall.Angle between power valve 1 and the receiving tube 2 is 120 °～150 °, and receiving tube 2 be shaped as trumpet type, power valve 1 emitted laser does not directly enter receiving tube 2 like this, but enter the extinction chamber 3 on opposite, when fire has smog to enter detecting chamber, laser will carry out scattering to all directions on smoke particle, thereby has part light to enter receiving tube 2, utilizes the analysis and judgement circuit just can judge fire condition.The light source of power valve 1 adopts all good LASER Light Source of stability and consistance, be provided with special extinction chamber 3 on the opposite of light source, and extinction chamber 3 be shaped as black matt band saw tooth, can the light that launch be absorbed fully, guarantee not disturb light to enter receiving tube 2, solve the problem that has more parasitic light to be received pipe 2 in the traditional design, reduced the cost of sampling, improved detection sensitivity.Simultaneously, reception reflected light part at this detecting chamber, also be provided with a prefocus cup 6, this prefocus cup 6 is for trumpet type and surface scribble equally distributed base copper, nickel dam and chromium layer from outside to inside successively, wherein, chromium layer minimum thickness 〉=0.25 micron, nickel layer thickness 〉=5 micron, back directive receiving tube 2 can fully be converged and reflect in base copper thickness 〉=7 micron by these three layers to the light that smoke particle launches, thereby improved light absorption greatly, detection sensitivity is improved greatly.
In actual use, power valve 1 emitted laser is injected extinction chamber 3 behind lens 4 and grating 5, when smog enters detecting chamber, smoke particle meeting reflector laser also enters receiving tube 2 after prefocus cup 6 fully converges, receiving tube 2 changes this light signal into electric signal, and circuit analysis can be determined the smokescope size after judging by analysis.
To sum up, the utility model filters grating 5 and collector lens 4 by being provided with in detecting chamber, make the light of dispersing become directional light accurately, and the parasitic light that influences detection sensitivity fully filtered, make the light of main spot see through grating, and then make light source stability and consistance obtain large increase.This smoke detection sensitivity reaches 0.001%obs/m, has domestic and the leading level in the world, and the detection field that utilizes the photodetection principle that smog is surveyed all can utilize this detecting chamber.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.
Claims (6)
1. laser sampling smoke detection chamber, comprise power valve (1) and receiving tube (2), it is characterized in that: described power valve (1) coaxial cable direction is provided with in order to absorb the extinction chamber (3) of the light emitted line of power valve (1), and the front end of power valve (1) is disposed with lens (4) and grating (5) between described power valve (1) and extinction chamber (3), and the rear end of described receiving tube (2) is provided with prefocus cup (6); The connecting line between described power valve (1) and extinction chamber (3) and the extended line of receiving tube (2) intersect.
2. according to the described laser sampling smoke detection of claim 1 chamber, it is characterized in that: the angle between described power valve (1) and the receiving tube (2) is 120 °～150 °.
3. according to the described laser sampling smoke detection of claim 1 chamber, it is characterized in that: described extinction chamber (3) be shaped as black matt band saw tooth.
4. according to claim 1 or described laser sampling smoke detection chambers 2, it is characterized in that: described receiving tube (2) be shaped as trumpet type.
5. according to the described laser sampling smoke detection of claim 1 chamber, it is characterized in that: described prefocus cup (6) surface scribbles equally distributed copper layer, nickel dam and chromium layer from outside to inside successively.
6. according to claim 1 or described laser sampling smoke detection chambers 2, it is characterized in that: the light source that described power valve (1) adopts is a LASER Light Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202449414U CN201600326U (en) | 2009-10-27 | 2009-10-27 | Laser sampling smoke detecting chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202449414U CN201600326U (en) | 2009-10-27 | 2009-10-27 | Laser sampling smoke detecting chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201600326U true CN201600326U (en) | 2010-10-06 |
Family
ID=42811390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202449414U Expired - Lifetime CN201600326U (en) | 2009-10-27 | 2009-10-27 | Laser sampling smoke detecting chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201600326U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370250A (en) * | 2016-08-17 | 2017-02-01 | 金卡高科技股份有限公司 | Device for detecting valve opening in-place of gas meter based on photoelectric reflection technology |
| CN109754565A (en) * | 2019-01-29 | 2019-05-14 | 山东省科学院自动化研究所 | A kind of photoelectric smoke smoke detection darkroom |
-
2009
- 2009-10-27 CN CN2009202449414U patent/CN201600326U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370250A (en) * | 2016-08-17 | 2017-02-01 | 金卡高科技股份有限公司 | Device for detecting valve opening in-place of gas meter based on photoelectric reflection technology |
| CN106370250B (en) * | 2016-08-17 | 2019-09-20 | 金卡智能集团股份有限公司 | Based on the gas meter, flow meter valve opening of photoelectric reflection technology to level detecting apparatus |
| CN109754565A (en) * | 2019-01-29 | 2019-05-14 | 山东省科学院自动化研究所 | A kind of photoelectric smoke smoke detection darkroom |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101109702B (en) | Large-caliber laser isotope scanner and method for measuring structure constant atmosphere index of refraction | |
| CN101592601B (en) | High-efficiency infrared gas sensor with small volume | |
| CN102221450A (en) | Tracking-pointing deviation measurement device for laser system | |
| CN201000431Y (en) | Smog detecting chamber | |
| CN201203577Y (en) | Infrared detection device for mash gas | |
| CN107907885A (en) | A kind of Underwater Target Detection device based on single-photon counting method | |
| CN206531758U (en) | A kind of laser detection air particle mass concentration sensor | |
| CN201600326U (en) | Laser sampling smoke detecting chamber | |
| CN205067286U (en) | Particulate matter detection device | |
| CN208606859U (en) | A kind of photoelectric liquid level sensor | |
| CN207661821U (en) | A kind of flame detecting device based on photodiode | |
| CN101592599A (en) | Absorbing cavity of infrared gas sensor with wide spectrum light source | |
| CN101592600B (en) | Quick-response infrared gas senor with high sensitivity | |
| CN105628654A (en) | Icing photoelectric sensor and icing measuring device | |
| CN202794024U (en) | Sample cell used for measuring molecular spectral absorption | |
| CN105116528A (en) | Scattering-type fire smoke detector and concentrator thereof | |
| CN201000432Y (en) | Smog detecting chamber | |
| CN205317624U (en) | Photoelectric sensor that PM2. 5 used in detection air | |
| CN105241818A (en) | Photoelectric probe for oil monitoring on water surface | |
| CN212340938U (en) | Light path collimation and light condensation structure special for dust detector | |
| CN108573591A (en) | A kind of scatter-type fire smog detector and its light absorber | |
| CN205067854U (en) | Scattering type conflagration smoke detector and spotlight ware thereof | |
| CN107940500A (en) | A kind of flame detecting device based on photodiode | |
| CN210400539U (en) | Optical pipeline type liquid level sensor | |
| CN210198501U (en) | Optical double-point liquid level sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
|
| CX01 | Expiry of patent term |