JPS6441837A - Liquid detection sensor - Google Patents
Liquid detection sensorInfo
- Publication number
- JPS6441837A JPS6441837A JP62198960A JP19896087A JPS6441837A JP S6441837 A JPS6441837 A JP S6441837A JP 62198960 A JP62198960 A JP 62198960A JP 19896087 A JP19896087 A JP 19896087A JP S6441837 A JPS6441837 A JP S6441837A
- Authority
- JP
- Japan
- Prior art keywords
- light
- oil
- optical fiber
- core
- porous film
- 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
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
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
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)
Abstract
PURPOSE:To detect the presence of a liquid accurately even when power lowers, by making a core exposed in the course of an optical fiber abut a porous film impervious to liquid except for at a diagonal detection position to propagate light through the optical fiber. CONSTITUTION:An optical fiber 2 is bent in an inverted U shape to be fixed with a cast resin 3. At the top of the inverted U, a clad 2b is cut off partially in the circumferential way thereof to expose a core 2a and a porous film 1, lipophiric and with affinity to light, is provided abutting the core 2a. A sensor section 10 is set at a place intended to detect the presence of oil and with a switch at a processing section 30 ON, a light emitter is driven to propagate light through the optical fiber. When oil is present, light is scattered with the core 2a as oil is transmitted through the porous film 1. Thus, the quantity of light received with a light receiver is less than that when no oil is present, thereby enabling judgement on the presence of oil depending on the quantity of light received with the light receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62198960A JPS6441837A (en) | 1987-08-07 | 1987-08-07 | Liquid detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62198960A JPS6441837A (en) | 1987-08-07 | 1987-08-07 | Liquid detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6441837A true JPS6441837A (en) | 1989-02-14 |
Family
ID=16399797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62198960A Pending JPS6441837A (en) | 1987-08-07 | 1987-08-07 | Liquid detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6441837A (en) |
-
1987
- 1987-08-07 JP JP62198960A patent/JPS6441837A/en active Pending
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