GB1320409A - Methods and apparatus for indicating or measuring resistance - Google Patents

Methods and apparatus for indicating or measuring resistance

Info

Publication number
GB1320409A
GB1320409A GB3199070A GB3199070A GB1320409A GB 1320409 A GB1320409 A GB 1320409A GB 3199070 A GB3199070 A GB 3199070A GB 3199070 A GB3199070 A GB 3199070A GB 1320409 A GB1320409 A GB 1320409A
Authority
GB
United Kingdom
Prior art keywords
current
zener diode
july
regulated
potential
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.)
Expired
Application number
GB3199070A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1320409A publication Critical patent/GB1320409A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

1320409 Automatic voltage and current control MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 1 July 1970 [1 July 1969] 31990/70 Heading G3R [Also in Division G1] The current through a load 24, Fig.3, (typically 10mA at 1kc/s) is regulated by rectifying 48, 49 the output of a current transformer 45 in series with the load, comparing 51 the resulting potential with the breakdown potential of a Zener diode 52 and using the difference to control 54 the potential applied to an oscillator 35, 36, 37, producing the current being regulated. In a modification Fig.6 (not shown) the current transformer 45 is replaced by a diode bridge (10), and additional feedback is provided by an additional winding (95) on the oscillator transformer 37. D.C. is supplied to the circuit either from a battery 30 or from a full wave rectified A. C. source Fig.4 (not shown), and is stabilized by a Zener diode 33 and a single transistor 31 or Fig. 5, (not shown) by a Zener diode (77) and a complementary pair of transistors (81, 74) designed to compensate for temperature variations. The arrangement forms part of a measuring system, see Division G1U.
GB3199070A 1969-07-01 1970-07-01 Methods and apparatus for indicating or measuring resistance Expired GB1320409A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5368969 1969-07-01

Publications (1)

Publication Number Publication Date
GB1320409A true GB1320409A (en) 1973-06-13

Family

ID=12949769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3199070A Expired GB1320409A (en) 1969-07-01 1970-07-01 Methods and apparatus for indicating or measuring resistance

Country Status (8)

Country Link
BE (1) BE752720A (en)
DE (1) DE2032379C3 (en)
ES (1) ES381249A1 (en)
FR (1) FR2056432A5 (en)
GB (1) GB1320409A (en)
NL (1) NL7009669A (en)
SE (1) SE360744B (en)
ZA (1) ZA704307B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269019A (en) * 1992-06-12 1994-01-26 Emerson Electric Uk Ltd Testing batteries

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269019A (en) * 1992-06-12 1994-01-26 Emerson Electric Uk Ltd Testing batteries
GB2269019B (en) * 1992-06-12 1996-02-14 Emerson Electric Uk Ltd A method and apparatus for battery testing

Also Published As

Publication number Publication date
DE2032379A1 (en) 1971-03-04
DE2032379B2 (en) 1973-07-26
ES381249A1 (en) 1972-11-16
BE752720A (en) 1970-12-01
SE360744B (en) 1973-10-01
NL7009669A (en) 1971-01-05
ZA704307B (en) 1971-02-24
DE2032379C3 (en) 1974-02-21
FR2056432A5 (en) 1971-05-14

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years