JPS5494775A - Illuminator in tunnel - Google Patents

Illuminator in tunnel

Info

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
Application number
JP95778A
Other languages
Japanese (ja)
Inventor
Sakae Kosugi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP95778A priority Critical patent/JPS5494775A/en
Publication of JPS5494775A publication Critical patent/JPS5494775A/en
Pending legal-status Critical Current

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
JP95778A 1978-01-09 1978-01-09 Illuminator in tunnel Pending JPS5494775A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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