JPS5494775A - Illuminator in tunnel - Google Patents
Illuminator in tunnelInfo
- Publication number
- JPS5494775A JPS5494775A JP95778A JP95778A JPS5494775A JP S5494775 A JPS5494775 A JP S5494775A JP 95778 A JP95778 A JP 95778A JP 95778 A JP95778 A JP 95778A JP S5494775 A JPS5494775 A JP S5494775A
- Authority
- JP
- Japan
- Prior art keywords
- value
- tunnel
- illuminator
- standard
- controller
- 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
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
PURPOSE: To maintain the sight in a tunnel by automatically controlling the brightness of an illuminator according to smoke permeability in addition to the automatic brightness control using a light receiving element.
CONSTITUTION: The Vi value detected by a smoke permeability (VI value) detector 8 is applied to a VI value controller 16 to ventilate the tunnel through a ventilation fan 18 when necessary to improve the IV value. The standard VI value for the fine and night times it stored in a memory 12. Thus, optimum standard IV value B is produced in response to the tunnel state input DI obtained by an automatic light controller 20 A. comparator 28 produces a signal for deenergizing an illuminator when the present VI value A is larger than the standard VI value B are for energizing the illuminator except for that time to produce a latch contact output DO through a process I/O device 10 to an illumination quantity control circuit 30.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP95778A JPS5494775A (en) | 1978-01-09 | 1978-01-09 | Illuminator in tunnel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP95778A JPS5494775A (en) | 1978-01-09 | 1978-01-09 | Illuminator in tunnel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5494775A true JPS5494775A (en) | 1979-07-26 |
Family
ID=11488134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP95778A Pending JPS5494775A (en) | 1978-01-09 | 1978-01-09 | Illuminator in tunnel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5494775A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7026248B2 (en) | 2002-01-21 | 2006-04-11 | Denso Corporation | Method for manufacturing semiconductor device with semiconductor region inserted into trench |
-
1978
- 1978-01-09 JP JP95778A patent/JPS5494775A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7026248B2 (en) | 2002-01-21 | 2006-04-11 | Denso Corporation | Method for manufacturing semiconductor device with semiconductor region inserted into trench |
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