JPS5447414A - Searching unit for disconnection fault - Google Patents
Searching unit for disconnection faultInfo
- Publication number
- JPS5447414A JPS5447414A JP11259577A JP11259577A JPS5447414A JP S5447414 A JPS5447414 A JP S5447414A JP 11259577 A JP11259577 A JP 11259577A JP 11259577 A JP11259577 A JP 11259577A JP S5447414 A JPS5447414 A JP S5447414A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- searching unit
- audible frequency
- searched
- audible
- 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
Abstract
PURPOSE: To ensure an accurate detection for the disconnection area through a miniature and light-weight constitution by detecting via a searching unit the audible frequency signals which are transmitted to the wiring from the oscilator.
CONSTITUTION: The audible frequency oscillator consists of oscillation frequency setting circuit part 4, buffer part 5 and polarity inversion circuit part 6, and transmits the oscillation output current to the searched circuit. At the same time, the audible frequency oscillator circuit detects the audible frequency signals leaked from the searched circuit through the searching unit in the form of the audible tones. Here, the searching unit is shifted along the circuit to perform detection through the variations of the tones detected under the state the output current of the oscillator is transmitted to the searched circuit. Thus, the fault occurrence areas can be detected accurately through a miniature and light-weight consititution
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11259577A JPS5447414A (en) | 1977-09-21 | 1977-09-21 | Searching unit for disconnection fault |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11259577A JPS5447414A (en) | 1977-09-21 | 1977-09-21 | Searching unit for disconnection fault |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5447414A true JPS5447414A (en) | 1979-04-14 |
Family
ID=14590662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11259577A Pending JPS5447414A (en) | 1977-09-21 | 1977-09-21 | Searching unit for disconnection fault |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5447414A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0275976A (en) * | 1988-09-13 | 1990-03-15 | Tokyo Electric Power Co Inc:The | Receiver |
KR100430221B1 (en) * | 1999-08-23 | 2004-05-03 | 엘지산전 주식회사 | Test apparatus for the switch lines of digital controller |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5063973A (en) * | 1973-10-08 | 1975-05-30 | ||
JPS5239147U (en) * | 1975-09-10 | 1977-03-19 |
-
1977
- 1977-09-21 JP JP11259577A patent/JPS5447414A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5063973A (en) * | 1973-10-08 | 1975-05-30 | ||
JPS5239147U (en) * | 1975-09-10 | 1977-03-19 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0275976A (en) * | 1988-09-13 | 1990-03-15 | Tokyo Electric Power Co Inc:The | Receiver |
KR100430221B1 (en) * | 1999-08-23 | 2004-05-03 | 엘지산전 주식회사 | Test apparatus for the switch lines of digital controller |
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