JPS6413404A - Opening and closing state detection sensor - Google Patents
Opening and closing state detection sensorInfo
- Publication number
- JPS6413404A JPS6413404A JP62170328A JP17032887A JPS6413404A JP S6413404 A JPS6413404 A JP S6413404A JP 62170328 A JP62170328 A JP 62170328A JP 17032887 A JP17032887 A JP 17032887A JP S6413404 A JPS6413404 A JP S6413404A
- Authority
- JP
- Japan
- Prior art keywords
- transmitted
- light
- optical fiber
- detection
- optical
- 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
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
PURPOSE:To obtain a detection sensor which reduces the possibility of malfunction due to an external noise and detects an opening/closing state by measuring variation in the transmission loss of light transmitted through one of a couple of optical fibers to the other. CONSTITUTION:The light which is transmitted from another optical fiber through an optical connector 7 enters an optical fiber 3 in an upper opposite member 1 passes through a lens 5, and is reflected by a reflecting mirror 9 to enter an optical fiber 4 through the gap between the member 1 and a lower opposite member 2 and a lens 6, and the light is transmitted to another optical fiber from the other end through an optical connector 8. Here, when no force operates from an object of detection, the gap between the members 1 and 2 are expanded by coil springs 10 and 11, but when force operates from the object of detection, a projection part 2b is fitted in a recessed part 1a and the members 1 and 2 come into close contact, so that the transmitted light has optical transmission loss according to the width of the gap between the members 1 and 2. For the purpose, variation in the optical transmission loss is measured to decide whether the object of detection is open or closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170328A JPS6413404A (en) | 1987-07-07 | 1987-07-07 | Opening and closing state detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170328A JPS6413404A (en) | 1987-07-07 | 1987-07-07 | Opening and closing state detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413404A true JPS6413404A (en) | 1989-01-18 |
Family
ID=15902913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62170328A Pending JPS6413404A (en) | 1987-07-07 | 1987-07-07 | Opening and closing state detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413404A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065586C (en) * | 1994-12-30 | 2001-05-09 | 本田技研工业株式会社 | Fuel injection control device for IC engine |
| KR100853972B1 (en) * | 2000-12-29 | 2008-08-25 | 램 리써치 코포레이션 | Diamond coatings on reactor wall and method of manufacturing thereof |
| CN112556634A (en) * | 2020-12-07 | 2021-03-26 | 贵州乌江清水河水电开发有限公司 | Joint meter monitoring system |
-
1987
- 1987-07-07 JP JP62170328A patent/JPS6413404A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065586C (en) * | 1994-12-30 | 2001-05-09 | 本田技研工业株式会社 | Fuel injection control device for IC engine |
| KR100853972B1 (en) * | 2000-12-29 | 2008-08-25 | 램 리써치 코포레이션 | Diamond coatings on reactor wall and method of manufacturing thereof |
| CN112556634A (en) * | 2020-12-07 | 2021-03-26 | 贵州乌江清水河水电开发有限公司 | Joint meter monitoring system |
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