JPS6429758A - Detection of current or potential difference - Google Patents
Detection of current or potential differenceInfo
- Publication number
- JPS6429758A JPS6429758A JP18637987A JP18637987A JPS6429758A JP S6429758 A JPS6429758 A JP S6429758A JP 18637987 A JP18637987 A JP 18637987A JP 18637987 A JP18637987 A JP 18637987A JP S6429758 A JPS6429758 A JP S6429758A
- Authority
- JP
- Japan
- Prior art keywords
- potential difference
- current
- bars
- detection
- degree
- 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
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE:To easily detect a very slight potential difference or current and to detect integrated current by a simple and inexpensive device by using an electrochromic EC material as a detecting material. CONSTITUTION:Metallic magnesium bars 33, 35 are disposed near an underground embedded pipe 31 and are connected in a hand hole 37 disposed on the ground. About 800mV potential difference is generated between the pipe 31 and the bars 33, 35 and, therefore, the potential difference can be easily known at all times by using the EC material having the discoloration generation voltage (threshold voltage)( lower than said value, for example, WO3, as the detecting material. The detecting material for which the suitable EC material is used and a suitable detector are combined and are installed between the contacts B and C or B and D of the hand hole 37, by which the integrated current is exactly known and the degree of corrosion of the embedded pipe 31 and degree of elution of the magnesium bars 33, 35 are more exactly estimated by the simple means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18637987A JPS6429758A (en) | 1987-07-24 | 1987-07-24 | Detection of current or potential difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18637987A JPS6429758A (en) | 1987-07-24 | 1987-07-24 | Detection of current or potential difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6429758A true JPS6429758A (en) | 1989-01-31 |
Family
ID=16187358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18637987A Pending JPS6429758A (en) | 1987-07-24 | 1987-07-24 | Detection of current or potential difference |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6429758A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137400A (en) * | 1997-07-18 | 1999-02-12 | Tokyo Gas Co Ltd | Surge current monitoring method of pipe line |
-
1987
- 1987-07-24 JP JP18637987A patent/JPS6429758A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137400A (en) * | 1997-07-18 | 1999-02-12 | Tokyo Gas Co Ltd | Surge current monitoring method of pipe line |
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