JPS57178124A - Leakage point detecting device in piping work - Google Patents
Leakage point detecting device in piping workInfo
- Publication number
- JPS57178124A JPS57178124A JP6485081A JP6485081A JPS57178124A JP S57178124 A JPS57178124 A JP S57178124A JP 6485081 A JP6485081 A JP 6485081A JP 6485081 A JP6485081 A JP 6485081A JP S57178124 A JPS57178124 A JP S57178124A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- distance
- leakage
- leakage point
- transducers
- 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
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
- G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
PURPOSE:To exactly detect a position of a leakage point, by detecting a leakage sound caused by water leakage, by use of 2 transducers, and deriving a time difference of the leakage sound transmitted to each transducer. CONSTITUTION:Transducers 1, 2 are placed at an interval of a distance L so as to place a water leakage point F between them, and a leakage sound is detected. For intance, when an unknown distance between the transducer 2 and the point F, and a transmission speed of a sound are denoted as X and V, respectively, a transfer time of a sound to the transducers 1, 2 becomes (L-X)/V and X/V, a difference of said transfer time becomes Td=(L-2X)/V, and by this expression, distance X=(L-VXTd)/2 is obtained. Accordingly, when a difference Td of a transfer time is measured by a prescribed electric circuit, a distance of a water leakage point X can be derived exactly from the transfer speed V of a sound and the distance L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6485081A JPS57178124A (en) | 1981-04-27 | 1981-04-27 | Leakage point detecting device in piping work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6485081A JPS57178124A (en) | 1981-04-27 | 1981-04-27 | Leakage point detecting device in piping work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57178124A true JPS57178124A (en) | 1982-11-02 |
Family
ID=13270081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6485081A Pending JPS57178124A (en) | 1981-04-27 | 1981-04-27 | Leakage point detecting device in piping work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57178124A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991004477A1 (en) * | 1989-09-19 | 1991-04-04 | Tokyo Gas Co, Ltd. | Piping abnormality monitoring apparatus |
| KR100926464B1 (en) * | 2008-03-10 | 2009-11-13 | 숭실대학교산학협력단 | Apparatus and method for detecting damage point in oil pipeline using acoustic wave |
-
1981
- 1981-04-27 JP JP6485081A patent/JPS57178124A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991004477A1 (en) * | 1989-09-19 | 1991-04-04 | Tokyo Gas Co, Ltd. | Piping abnormality monitoring apparatus |
| US5333501A (en) * | 1989-09-19 | 1994-08-02 | Tokyo Gas Co., Ltd. | Abnormality monitoring apparatus for a pipeline |
| KR100926464B1 (en) * | 2008-03-10 | 2009-11-13 | 숭실대학교산학협력단 | Apparatus and method for detecting damage point in oil pipeline using acoustic wave |
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