JPS5769230A - Photoelectric smoke sensor - Google Patents
Photoelectric smoke sensorInfo
- Publication number
- JPS5769230A JPS5769230A JP14523980A JP14523980A JPS5769230A JP S5769230 A JPS5769230 A JP S5769230A JP 14523980 A JP14523980 A JP 14523980A JP 14523980 A JP14523980 A JP 14523980A JP S5769230 A JPS5769230 A JP S5769230A
- Authority
- JP
- Japan
- Prior art keywords
- smoke
- light
- smoke chamber
- beams
- zones
- 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.)
- Pending
Links
- 239000000779 smoke Substances 0.000 title abstract 10
- 239000013307 optical fiber Substances 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
PURPOSE:To give a smoke chamber non-directionally instead of making it rectangular by leading the light beams from a light source to the smoke chamber through an optical fiber and making conical the illuminated zone. CONSTITUTION:Light beams from a light source 5 positioned at a suitable place in a main body 1 are transmitted to a smoke chamber 4 through optical fiber 7, and illuminate conical zones by an illuminating member 10a. The light beams diffused by smoke that comes in the illuminated zones B are collected by a light collecting member 10b to shoot a light receiving element 6. The inner faces of connectors 3 and a lid 2 constituting the smoke chamber 4 are light absorbing and non-reflecting members 11 are also provided. When a fire breaks out, its smoke gets onto the smoke chamber 4, and when it reaches the illuminated zones B diffused beams are created and they reach the light receiving element 6 through the light collecting member 10b, and the existence of smoke is sensed by a smoke detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14523980A JPS5769230A (en) | 1980-10-17 | 1980-10-17 | Photoelectric smoke sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14523980A JPS5769230A (en) | 1980-10-17 | 1980-10-17 | Photoelectric smoke sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5769230A true JPS5769230A (en) | 1982-04-27 |
Family
ID=15380541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14523980A Pending JPS5769230A (en) | 1980-10-17 | 1980-10-17 | Photoelectric smoke sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5769230A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61167840A (en) * | 1985-01-21 | 1986-07-29 | Toyota Motor Corp | Measuring instrument for smoke density of internal-combustion engine |
| JP2016205995A (en) * | 2015-04-22 | 2016-12-08 | 株式会社堀場製作所 | Oil mist detector and oil mist detection method |
-
1980
- 1980-10-17 JP JP14523980A patent/JPS5769230A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61167840A (en) * | 1985-01-21 | 1986-07-29 | Toyota Motor Corp | Measuring instrument for smoke density of internal-combustion engine |
| JP2016205995A (en) * | 2015-04-22 | 2016-12-08 | 株式会社堀場製作所 | Oil mist detector and oil mist detection method |
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