JPS557622A - Diagnosis unit for wiring failure - Google Patents

Diagnosis unit for wiring failure

Info

Publication number
JPS557622A
JPS557622A JP7981378A JP7981378A JPS557622A JP S557622 A JPS557622 A JP S557622A JP 7981378 A JP7981378 A JP 7981378A JP 7981378 A JP7981378 A JP 7981378A JP S557622 A JPS557622 A JP S557622A
Authority
JP
Japan
Prior art keywords
distance
point
voltage
frequency
minimum
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
Application number
JP7981378A
Other languages
Japanese (ja)
Other versions
JPS6148672B2 (en
Inventor
Akira Endo
Takahiko Tanigami
Naoya Seki
Akira Hasegawa
Kazunori Uruno
Hiroyuki Sugao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automob Antipollut & Saf Res Center
Automobile Appliance Anti Pollution and Safety Research Center
Original Assignee
Automob Antipollut & Saf Res Center
Automobile Appliance Anti Pollution and Safety Research Center
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Automob Antipollut & Saf Res Center, Automobile Appliance Anti Pollution and Safety Research Center filed Critical Automob Antipollut & Saf Res Center
Priority to JP7981378A priority Critical patent/JPS557622A/en
Publication of JPS557622A publication Critical patent/JPS557622A/en
Publication of JPS6148672B2 publication Critical patent/JPS6148672B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Locating Faults (AREA)

Abstract

PURPOSE: To detect the wiring fautly point with a simple unit, by relating the distance to the faulty point and the change in the input impedance of wiring, by means of frequency.
CONSTITUTION: When sinusoidal wave signal of a given amplitude is given to the wire harness 2 which is in short circuit at the point of l from the input terminal, from the sweep generator 4, the input impedance is changed with the change in frequency f, and the voltage Vo at the input terminal is a minimum at the point of Von/2l(where; n is a positive integer.) and minimum points are produced periodically every frequency distance Vo/2l. Accordingly, by detecting the frequency distance fo for the minimum points of voltage Vo, the distance l to the faulty point can be detected with l=Vo/2fo. Thus, the voltage detection circuit 6 detects the voltage Vo and the minimum voltage detection circuit 7 detects the minimum points of the voltage Vo and the memory circuits 8 and 9 memorize the frequency corresponding to the minimum points adjacent each other. Since the difference between the frequencies memorized shows the distance fd, the distance l to the faulty point can be known with the operation by the said equations by means of the conversion circuit 11.
COPYRIGHT: (C)1980,JPO&Japio
JP7981378A 1978-07-03 1978-07-03 Diagnosis unit for wiring failure Granted JPS557622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7981378A JPS557622A (en) 1978-07-03 1978-07-03 Diagnosis unit for wiring failure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7981378A JPS557622A (en) 1978-07-03 1978-07-03 Diagnosis unit for wiring failure

Publications (2)

Publication Number Publication Date
JPS557622A true JPS557622A (en) 1980-01-19
JPS6148672B2 JPS6148672B2 (en) 1986-10-25

Family

ID=13700636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7981378A Granted JPS557622A (en) 1978-07-03 1978-07-03 Diagnosis unit for wiring failure

Country Status (1)

Country Link
JP (1) JPS557622A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189886U (en) * 1984-05-25 1985-12-16 株式会社精工舎 crystal watch with chronograph
CN104090214A (en) * 2014-07-31 2014-10-08 成都高斯电子技术有限公司 Cable fault detection and aging analysis method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130651A (en) * 1976-04-27 1977-11-02 Mitsubishi Electric Corp Optical fiber apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130651A (en) * 1976-04-27 1977-11-02 Mitsubishi Electric Corp Optical fiber apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189886U (en) * 1984-05-25 1985-12-16 株式会社精工舎 crystal watch with chronograph
CN104090214A (en) * 2014-07-31 2014-10-08 成都高斯电子技术有限公司 Cable fault detection and aging analysis method
CN104090214B (en) * 2014-07-31 2016-08-17 成都高斯电子技术有限公司 A kind of Cable fault examination and aging analysis method

Also Published As

Publication number Publication date
JPS6148672B2 (en) 1986-10-25

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