JPS5524686A - Dc resistance measuring method - Google Patents

Dc resistance measuring method

Info

Publication number
JPS5524686A
JPS5524686A JP9858078A JP9858078A JPS5524686A JP S5524686 A JPS5524686 A JP S5524686A JP 9858078 A JP9858078 A JP 9858078A JP 9858078 A JP9858078 A JP 9858078A JP S5524686 A JPS5524686 A JP S5524686A
Authority
JP
Japan
Prior art keywords
signal
converter
voltage
fed
digital quantity
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
Application number
JP9858078A
Other languages
Japanese (ja)
Inventor
Shuichi Fujieda
Nobuo Omori
Yoshihiro Nurita
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP9858078A priority Critical patent/JPS5524686A/en
Publication of JPS5524686A publication Critical patent/JPS5524686A/en
Pending legal-status Critical Current

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  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To highly accurately measure the DC resistance at a high speed by determining the ratio between the mean digital quantity of a current flowing through a resistor to be measured and the mean digital quantity of the voltage generated at the both terminals thereof.
CONSTITUTION: A digital signal 17, which is gradually increased from zero, is fed from a micro-processor MP 16 to a D/A converter 10, from which a constant current corresponding linearly to the signal 17 is fed out. At the both terminals of a resistor 11 to be measured, there is generated a voltage which is proportional to the current value which is produced from the converter 10. As a result, the voltage, which is amplified by an amplifier 13 having a preset gain, is converted into a digital quantity by an A/D converter 14 so that the resultant digital signal 15 is fed to the MP 16. This signal 15 is supplied to the MP 16 each time the signal 17 is renewed to a value, and the measurements are started at the time when the signsl exceeds a preset value so that the signals 17 and 15 are stored in the MP 16. Thus, it is possible to remarkably improve the measuring time and accuracy.
COPYRIGHT: (C)1980,JPO&Japio
JP9858078A 1978-08-11 1978-08-11 Dc resistance measuring method Pending JPS5524686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9858078A JPS5524686A (en) 1978-08-11 1978-08-11 Dc resistance measuring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9858078A JPS5524686A (en) 1978-08-11 1978-08-11 Dc resistance measuring method

Publications (1)

Publication Number Publication Date
JPS5524686A true JPS5524686A (en) 1980-02-21

Family

ID=14223586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9858078A Pending JPS5524686A (en) 1978-08-11 1978-08-11 Dc resistance measuring method

Country Status (1)

Country Link
JP (1) JPS5524686A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60137382U (en) * 1984-02-17 1985-09-11 河野　薫勝 Resistance measurement system using constant current pulses
JPH03239967A (en) * 1990-02-17 1991-10-25 Horiba Ltd Measuring device for electric conductivity and specific resistance
CN103472307A (en) * 2013-09-10 2013-12-25 中国工程物理研究院化工材料研究所 Computer micro-resistor high-precision testing device based on CPCI

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60137382U (en) * 1984-02-17 1985-09-11 河野　薫勝 Resistance measurement system using constant current pulses
JPH03239967A (en) * 1990-02-17 1991-10-25 Horiba Ltd Measuring device for electric conductivity and specific resistance
CN103472307A (en) * 2013-09-10 2013-12-25 中国工程物理研究院化工材料研究所 Computer micro-resistor high-precision testing device based on CPCI

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