CN204010217U - Linear laser device in a kind of air suction type smoke fire detector - Google Patents
Linear laser device in a kind of air suction type smoke fire detector Download PDFInfo
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- CN204010217U CN204010217U CN201420465939.0U CN201420465939U CN204010217U CN 204010217 U CN204010217 U CN 204010217U CN 201420465939 U CN201420465939 U CN 201420465939U CN 204010217 U CN204010217 U CN 204010217U
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- laser device
- linear laser
- fire detector
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Abstract
The utility model discloses the linear laser device in a kind of air suction type smoke fire detector, described linear laser device comprises and is arranged on the laser instrument being arranged in order in housing, focusing lens, lenticular lenses and light activated element, the sidewall of housing is provided with air admission hole and vent port, focusing lens comprises with the center line of laser beam and is arranged on two convex lens and a slice concavees lens on same contour, lenticular lenses is at least provided with two and be parallel to each other, the center line of laser beam is departed from the installation site of light activated element, air admission hole and vent port are arranged in the housing sidewall between lenticular lenses and light activated element.This linear laser device, owing to having adopted the laser beam that is focused into wire, can improve the sensitivity of detection so greatly, and effectively the prolongation of optical axis has also improved detection stability.
Description
Technical field
The utility model relates to fire control equipment technical field, is specifically related to the linear laser device in a kind of air suction type smoke fire detector.
Background technology
In existing fire fighting equipment, it is the most frequently used detection means that smoke detection is reported to the police, after detector alarm, can start fire broadcast and evacuate personnel, fall fire compartment rolling screen door and prevent fire spreading, starting fire pump etc., is effectively a very important ring in the whole link of fire-fighting with surveying accurately.
Air suction type smoke fire detector is a kind of utmost point early-stage smog sniffer of smoke detection immediate development, its warning sensitivity can reach 0.001obs/m, it is nearly thousand times that conventional port smog is popped one's head in, the micro-smog that the stage of finding to glow is in early days produced has extremely strong detectivity, promoted rapidly in recent years, and clear and definite regulation (GB50116-2013) is also done by China's " Code for design of automatic fire alarm systems ".
As shown in Figure 2, the laser instrument in existing air suction type smoke fire detector is originally as semiconductor laser, and the infrared laser of transmitting 650nm, after line focus mirror, forms focal fan-shaped (the each producer of fan-shaped angle is a not of uniform size) light path.Smoke particle through air intake opening, spreads in chamber, and particle, in the time of overfocus, produces stronger forward scattering, and particle in the fan section forward scattering light a little less than also producing relatively.Each scattered light is received by light activated element, forms electric signal, and the size of this electric signal directly represents the concentration of smog.In Fig. 2, can see that the place's brightness of light focus is stronger, so when smoke particle enters this point, forward scattering is also the strongest, and other regions are all weaker than the forward scattering of focus, and this will make sensitivity be subject to certain restrictions.The many scopes at 0.004～0.005obs/m of general its sensitivity.
Chinese patent ZL 00210671.X discloses a kind of laser reflection smoke fire detector, formed by reflecting body, sonde body, in sonde body, parallel device has near-infrared laser transmitter and photodiode receiver, and be connected with control circuit, the flat board that reflecting body scribbles glass microballoon array by surface forms.This utility model adopts near infrared semiconductor laser light source, glass microballoon coating reflecting body, although detection range is strengthened, reflection angle is wealthy wide.But this detector volume is large, and detection sensitivity is low.
Utility model content
The utility model object is, overcomes defect of the prior art, provides a kind of volume little, simple in structure, surveys the linear laser device in the air suction type smoke fire detector that Smoking Seusitivity is high.
For achieving the above object, the technical solution adopted in the utility model is: the linear laser device in a kind of air suction type smoke fire detector is provided, described linear laser device comprises and is arranged on the laser instrument, focusing lens, lenticular lenses and the light activated element that in housing, are arranged in order, and the sidewall of housing is provided with air admission hole and vent port.
Wherein preferred technical scheme is, described focusing lens comprises with the center line of laser beam and is arranged on two convex lens and a slice concavees lens on same contour.
Further preferred technical scheme is, described lenticular lenses is at least provided with two and be parallel to each other.
Further preferred technical scheme also has, and the center line of laser beam is departed from the installation site of described light activated element.
Preferred technical scheme also has, and described air admission hole and vent port are arranged in the housing sidewall between lenticular lenses and light activated element.
Advantage of the present utility model and beneficial effect be, this linear laser device, owing to having adopted the laser beam that is focused into wire, can improve the sensitivity of detection so greatly, and effectively the prolongation of optical axis has also improved detection stability.Laser diameter can also be reduced, volume is less simultaneously.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model linear laser device;
Fig. 2 is the structural representation of this existing laser instrument.
In figure: 1-housing, 2-laser instrument, 3-focus lamp, 31-convex lens, 3.2-concavees lens, 4-lenticular lenses, 5-light activated element, 6-air admission hole, 7-vent port.
Embodiment
As shown in Figure 1, the utility model is the linear laser device in a kind of air suction type smoke fire detector, described linear laser device comprises and is arranged on the laser instrument 2, focusing lens 3, lenticular lenses 4 and the light activated element 5 that in housing 1, are arranged in order, and the sidewall of housing 1 is provided with air admission hole 6 and vent port 7.
The preferred embodiment of the utility model is, described focusing lens 3 comprises with the center line of laser beam and is arranged on two convex lens 3.1 and a slice concavees lens 3.2 on same contour.
The utility model further preferred technical scheme is, described lenticular lenses is at least provided with two and be parallel to each other.
The utility model further preferred embodiment also has, and the center line of laser beam is departed from the installation site of described light activated element 5.
The preferred embodiment of the utility model also has, and described air admission hole 6 and vent port 7 are arranged on housing 1 sidewall between lenticular lenses 4 and light activated element 5.
The detection principle of the linear laser device in this air suction type smoke fire detector is: when smog is entered into after enclosure interior by air inlet aperture, after tiny dust in flue gas and linear laser beam cross, dust will make linear laser beam be scattering into pyramidal light beam, pyramidal light beam irradiates is to after on light activated element 5, will be transformed into and determine signal, this electric signal is by the size according to dust granules in smog, the height of density, the length of duration and changing, this smoke signal produces corresponding alerting signal after control circuit is processed.
Due to distance between focusing lens 3 and laser instrument 2.Also fewer than the half of existing optical system distance, so the wide-angle laser of laser instrument transmitting, is all focused eyeglass 3 and receives, and be focused into Line of light, wire optical axis is less than Φ 1mm.
Because laser instrument is provided with three grades of eyeglasses in very little space, so effective optical path is longer, so also greatly improve the sensitivity of equipment.
The utility model is not limited to above-mentioned embodiment, those skilled in the art make to any apparent improvement of above-mentioned embodiment or change, can not exceed the protection domain of design of the present utility model and claims.
Claims (5)
1. the linear laser device in air suction type smoke fire detector, is characterized in that, described linear laser device comprises and be arranged on the laser instrument, focusing lens, lenticular lenses and the light activated element that in housing, are arranged in order, and the sidewall of housing is provided with air admission hole and vent port.
2. the linear laser device in air suction type smoke fire detector as claimed in claim 1, is characterized in that, described focusing lens comprises with the center line of laser beam and is arranged on two convex lens and a slice concavees lens on same contour.
3. the linear laser device in air suction type smoke fire detector as claimed in claim 2, is characterized in that, described lenticular lenses is at least provided with two and be parallel to each other.
4. the linear laser device in air suction type smoke fire detector as claimed in claim 2, is characterized in that, the center line of laser beam is departed from the installation site of described light activated element.
5. the linear laser device in air suction type smoke fire detector as claimed in claim 1, is characterized in that, described air admission hole and vent port are arranged in the housing sidewall between lenticular lenses and light activated element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420465939.0U CN204010217U (en) | 2014-08-18 | 2014-08-18 | Linear laser device in a kind of air suction type smoke fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420465939.0U CN204010217U (en) | 2014-08-18 | 2014-08-18 | Linear laser device in a kind of air suction type smoke fire detector |
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| Publication Number | Publication Date |
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| CN204010217U true CN204010217U (en) | 2014-12-10 |
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| CN201420465939.0U Active CN204010217U (en) | 2014-08-18 | 2014-08-18 | Linear laser device in a kind of air suction type smoke fire detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459817A (en) * | 2014-12-16 | 2015-03-25 | 公安部沈阳消防研究所 | Fire sign detection device and method |
-
2014
- 2014-08-18 CN CN201420465939.0U patent/CN204010217U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459817A (en) * | 2014-12-16 | 2015-03-25 | 公安部沈阳消防研究所 | Fire sign detection device and method |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221228 Address after: 200131 Room A2, Floor 5, No. 456, Fute North Road, Pudong New Area Free Trade Pilot Zone, Shanghai Patentee after: HONEYWELL AUTOMATION CONTROL (CHINA) CO.,LTD. Address before: Floor 3, Standard Plant, No. 3, Yongjie North Road, Yongfeng Industrial Base, Haidian District, Beijing 100094 Patentee before: DINGSHENGTE SAFETY WARNING TECHNOLOGY (BEIJING) Co.,Ltd. |