JPS6467473A - Current leakage detecting device for return wire - Google Patents
Current leakage detecting device for return wireInfo
- Publication number
- JPS6467473A JPS6467473A JP22211887A JP22211887A JPS6467473A JP S6467473 A JPS6467473 A JP S6467473A JP 22211887 A JP22211887 A JP 22211887A JP 22211887 A JP22211887 A JP 22211887A JP S6467473 A JPS6467473 A JP S6467473A
- Authority
- JP
- Japan
- Prior art keywords
- section
- generated
- current
- frequency
- asynchronous
- 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.)
- Granted
Links
Landscapes
- Train Traffic Observation, Control, And Security (AREA)
Abstract
PURPOSE:To enable a reliable detection, for a track section through which signal current synchronous with the frequency of train current flows, by detecting the fact that asynchronous current has flowed in due to leakage baed on the presence of a higher harmonic component together with a modulated wave in the output of a demodulator. CONSTITUTION:A portion adjacent to a synchronous section TP and a asynchronous section TB which are separated by inserting an insulating material 4 to rails 3 is provided with a detection loop 5 composed of transceiver coil. The component of frequency fP is extracted from the train current PS of the synchronous section TP, a sending carrier wave fC1 is generated by an oscillator 12, a modulated wave fS of lower frequency thereof is also generated by an oscillator 14, a sum frequency fi is generated by a modulator 15, and a sending signal fA is generated by a modulator 16. On the other hand, the sending signal fA and the 15th higher harmonic wave fb of the current fS passing to the asynchronous section TB are extracted by BPF23 and given to a demodulator 24, the output thereof is sent to a detector 26, and a leakage detecting output is sent out when the higher harmonic component is larger than the modulated wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22211887A JPS6467473A (en) | 1987-09-07 | 1987-09-07 | Current leakage detecting device for return wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22211887A JPS6467473A (en) | 1987-09-07 | 1987-09-07 | Current leakage detecting device for return wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6467473A true JPS6467473A (en) | 1989-03-14 |
| JPH0565392B2 JPH0565392B2 (en) | 1993-09-17 |
Family
ID=16777438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22211887A Granted JPS6467473A (en) | 1987-09-07 | 1987-09-07 | Current leakage detecting device for return wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6467473A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100386844B1 (en) * | 1997-08-28 | 2003-08-21 | 엘지산전 주식회사 | Feedback circuit transmitter |
-
1987
- 1987-09-07 JP JP22211887A patent/JPS6467473A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100386844B1 (en) * | 1997-08-28 | 2003-08-21 | 엘지산전 주식회사 | Feedback circuit transmitter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0565392B2 (en) | 1993-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |