JPS55117986A - Pressure release time measuring unit - Google Patents
Pressure release time measuring unitInfo
- Publication number
- JPS55117986A JPS55117986A JP2636179A JP2636179A JPS55117986A JP S55117986 A JPS55117986 A JP S55117986A JP 2636179 A JP2636179 A JP 2636179A JP 2636179 A JP2636179 A JP 2636179A JP S55117986 A JPS55117986 A JP S55117986A
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- pressure release
- jet
- jet path
- solar battery
- 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
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
PURPOSE: To make it possible to measure a gas jet time with a high precision by causing a parallel beam of a laser light beam to pass through a gas jet path and by utilizing the schlieren method to measure the gas jet time.
CONSTITUTION: During normalcy where atmospheric pressure is not changed in jet path 11, a prescribed light quantity of laser light beam O condensed onto focus face 6 is received through pin hole 7a by solar battery 8 which is a light receiver. The output of a prescribed level is transmitted from solar battery 8 and is inputted to recorder 10, etc., through DC amplifier 9. When the pressure release film is broken to generate gas jet in jet path 11 due to rise of the internal atmospheric pressure at the pressure release test time of an arrester, gas density in jet path 11 is changed, and therefore, laser light beam O passing through jet path 22 does not become a parallel light beam, and the focus face is moved to, for example, position 6a. Therefore, the output of solar battery 6 is reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2636179A JPS55117986A (en) | 1979-03-06 | 1979-03-06 | Pressure release time measuring unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2636179A JPS55117986A (en) | 1979-03-06 | 1979-03-06 | Pressure release time measuring unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55117986A true JPS55117986A (en) | 1980-09-10 |
Family
ID=12191344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2636179A Pending JPS55117986A (en) | 1979-03-06 | 1979-03-06 | Pressure release time measuring unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55117986A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0425151A (en) * | 1990-05-21 | 1992-01-28 | Canon Inc | Thin plate carrying device |
-
1979
- 1979-03-06 JP JP2636179A patent/JPS55117986A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0425151A (en) * | 1990-05-21 | 1992-01-28 | Canon Inc | Thin plate carrying device |
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