JPS56166442A - Leakage detector - Google Patents
Leakage detectorInfo
- Publication number
- JPS56166442A JPS56166442A JP6956680A JP6956680A JPS56166442A JP S56166442 A JPS56166442 A JP S56166442A JP 6956680 A JP6956680 A JP 6956680A JP 6956680 A JP6956680 A JP 6956680A JP S56166442 A JPS56166442 A JP S56166442A
- Authority
- JP
- Japan
- Prior art keywords
- bridge circuit
- resistance wire
- unbalanced
- detecting sensor
- leak detecting
- 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
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
PURPOSE:To detect leakage with a high sensitivity at a lower cost in a simple handling manner by detecting an unbalanced output voltage of a bridge circuit into which a leak detecting sensor containing a resistance wire is incorporated. CONSTITUTION:Numeral 1 indicates a portable leak detecting sensor containing a resistance wire composing an unbalanced impedance of a bridge circuit, 2 an air shield hood, 3 a voltage detector, 4 an impedance composing the bridge circuit, 5 a power source and 6 a through hole made on the air shield hood. The leak detecting sensor 1 is put on the surface of a test matter into which air is sealed and is moved slowly therealong. An airflow leaked at affected points touches the resistance wire of the sensor 1 and resulting changes in the temperature causes a variation in the resistance value. An unbalanced voltage is generated in the bridge circuit thereby enabling the detection of possible leaked points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6956680A JPS56166442A (en) | 1980-05-27 | 1980-05-27 | Leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6956680A JPS56166442A (en) | 1980-05-27 | 1980-05-27 | Leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56166442A true JPS56166442A (en) | 1981-12-21 |
Family
ID=13406448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6956680A Pending JPS56166442A (en) | 1980-05-27 | 1980-05-27 | Leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56166442A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181279A (en) * | 2015-09-29 | 2015-12-23 | 青岛歌尔声学科技有限公司 | Air tightness detection device |
| JP2021039048A (en) * | 2019-09-05 | 2021-03-11 | 日立グローバルライフソリューションズ株式会社 | Inspection method and inspection system |
-
1980
- 1980-05-27 JP JP6956680A patent/JPS56166442A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181279A (en) * | 2015-09-29 | 2015-12-23 | 青岛歌尔声学科技有限公司 | Air tightness detection device |
| JP2021039048A (en) * | 2019-09-05 | 2021-03-11 | 日立グローバルライフソリューションズ株式会社 | Inspection method and inspection system |
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