JPS559126A - Tangent delta measuring apparatus - Google Patents

Tangent delta measuring apparatus

Info

Publication number
JPS559126A
JPS559126A JP8172878A JP8172878A JPS559126A JP S559126 A JPS559126 A JP S559126A JP 8172878 A JP8172878 A JP 8172878A JP 8172878 A JP8172878 A JP 8172878A JP S559126 A JPS559126 A JP S559126A
Authority
JP
Japan
Prior art keywords
zero
time
voltage
circuits
latch
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
JP8172878A
Other languages
Japanese (ja)
Inventor
Akira Miura
Masashi Kamio
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8172878A priority Critical patent/JPS559126A/en
Publication of JPS559126A publication Critical patent/JPS559126A/en
Pending legal-status Critical Current

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  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To enable zero point calibration at the time of measuring tanδ of impedanceby A/D converter converting the detected voltage and standard voltage using high speed converter and processing them.
CONSTITUTION: The standard voltage and the detected voltage made thru the standard resistor 2 and the resistor 5 of the impedance 4 to be measured are digitally converted at the high speed converters 21B. 21A to be switched by the interlocking switches 22B and 22D, 22A and 22C which synchronize with the clock of the clock generator 8, and are temporarily stored at the latch circuits 23D. 23C which connect with latch circuit 23C. 23A and zero calibration contact point b.... When the latch contents of the circuits 23C and 23D, 23A and 23B coincide, digital standard voltage and detected voltage (both finishing zero calibration) are outputted from the comparison circuits 24B. 24A; pulses, width thereof corresponds to the difference at the time when the two voltages become zero are generated from the time difference detection circuit 25; and tanδ corresponding to the phase difference the electric current flowing from the clock counter 10 thru the impedance 4 is calculated while being zero calibrated at the time of measurement. Accordingly, the abovementioned system enables the measurement of high accuracy free from the influence of temperature and drift.
COPYRIGHT: (C)1980,JPO&Japio
JP8172878A 1978-07-04 1978-07-04 Tangent delta measuring apparatus Pending JPS559126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8172878A JPS559126A (en) 1978-07-04 1978-07-04 Tangent delta measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8172878A JPS559126A (en) 1978-07-04 1978-07-04 Tangent delta measuring apparatus

Publications (1)

Publication Number Publication Date
JPS559126A true JPS559126A (en) 1980-01-23

Family

ID=13754466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8172878A Pending JPS559126A (en) 1978-07-04 1978-07-04 Tangent delta measuring apparatus

Country Status (1)

Country Link
JP (1) JPS559126A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599828A (en) * 1982-07-08 1984-01-19 Okaya Denki Sangyo Kk Heating cathode and production process thereof
JPS63218872A (en) * 1987-03-09 1988-09-12 Central Res Inst Of Electric Power Ind Measuring method of loss in induction coil
WO2015030686A1 (en) * 2013-08-27 2015-03-05 RC IKT d.o.o. Measuring method of small capacitance in a circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599828A (en) * 1982-07-08 1984-01-19 Okaya Denki Sangyo Kk Heating cathode and production process thereof
JPH0360135B2 (en) * 1982-07-08 1991-09-12 Okaya Denki Sangyo Kk
JPS63218872A (en) * 1987-03-09 1988-09-12 Central Res Inst Of Electric Power Ind Measuring method of loss in induction coil
WO2015030686A1 (en) * 2013-08-27 2015-03-05 RC IKT d.o.o. Measuring method of small capacitance in a circuit

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