CA944023A - Method and apparatus for measurement of surface charge of an electret - Google Patents

Method and apparatus for measurement of surface charge of an electret

Info

Publication number
CA944023A
CA944023A CA107,599A CA107599A CA944023A CA 944023 A CA944023 A CA 944023A CA 107599 A CA107599 A CA 107599A CA 944023 A CA944023 A CA 944023A
Authority
CA
Canada
Prior art keywords
electret
measurement
surface charge
charge
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
CA107,599A
Other languages
English (en)
Other versions
CA107599S (en
Inventor
Gerhard M. Sessler
James E. West
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of CA944023A publication Critical patent/CA944023A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R5/00—Instruments for converting a single current or a single voltage into a mechanical displacement
    • G01R5/28—Electrostatic instruments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making

Landscapes

  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
CA107,599A 1970-07-30 1971-03-12 Method and apparatus for measurement of surface charge of an electret Expired CA944023A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5953170A 1970-07-30 1970-07-30

Publications (1)

Publication Number Publication Date
CA944023A true CA944023A (en) 1974-03-19

Family

ID=22023564

Family Applications (1)

Application Number Title Priority Date Filing Date
CA107,599A Expired CA944023A (en) 1970-07-30 1971-03-12 Method and apparatus for measurement of surface charge of an electret

Country Status (4)

Country Link
US (1) US3652932A (nl)
JP (1) JPS573022B1 (nl)
CA (1) CA944023A (nl)
NL (1) NL162743C (nl)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789294A (en) * 1972-07-19 1974-01-29 Chubu Seiki Kk Apparatus for measuring insulating and voltage resistant characteristics of articles
US3854337A (en) * 1973-10-01 1974-12-17 Us Atomic Energy Charge storage device
JPS52111515U (nl) * 1976-02-19 1977-08-24
US4264331A (en) * 1977-08-03 1981-04-28 Johnson Controls, Inc. Charged non-conductive polar gas sensing element and detection system
FR2455286A1 (fr) * 1979-04-23 1980-11-21 Dreyfus Gerard Perfectionnements aux dispositifs de mesure des parametres susceptibles de modifier la charge d'un electret
FR2475740A2 (fr) * 1980-02-11 1981-08-14 Lewiner Jacques Perfectionnements aux dispositifs de mesure de parametres susceptibles de modifier la charge d'un electret
EP0018293B1 (fr) * 1979-04-23 1985-03-27 Jacques Lewiner Perfectionnements aux dispositifs de mesure des paramètres susceptibles de modifier la charge d'un électret
US4884031A (en) * 1988-09-29 1989-11-28 Friedemann Freund Method and apparatus for charge distribution analysis
US5187442A (en) * 1988-09-29 1993-02-16 Friedemann Freund Method and apparatus for charge distribution analysis
US5388163A (en) * 1991-12-23 1995-02-07 At&T Corp. Electret transducer array and fabrication technique
US5405584A (en) * 1992-04-03 1995-04-11 Zito; Richard R. Device for detecting adsorbed molecules
US5835027A (en) * 1996-11-07 1998-11-10 Tyburski; Robert M. Residual charge effect traffic sensor
US6833687B2 (en) * 2003-04-18 2004-12-21 Agilent Technologies, Inc. Electromechanical power converter
US7525205B2 (en) * 2006-07-28 2009-04-28 Sanyo Electric Co., Ltd. Electric power generator
US9929679B2 (en) * 2013-03-19 2018-03-27 Sendai Smart Machines Co., Ltd. Electrostatic induction-type vibration power generation device and method of manufacturing the same
CN104237605B (zh) * 2014-09-04 2018-01-09 兰州空间技术物理研究所 一种高压静电电压测量装置
CN105785103A (zh) * 2016-03-03 2016-07-20 兰州空间技术物理研究所 一种电容分压式卫星表面电位监测装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496461A (en) * 1967-05-25 1970-02-17 Bell Telephone Labor Inc Method of measuring the volume resistivity of thin,solid dielectric material utilizing the decay rates of a number of measured decay intervals

Also Published As

Publication number Publication date
NL162743B (nl) 1980-01-15
US3652932A (en) 1972-03-28
NL7110406A (nl) 1972-02-01
NL162743C (nl) 1980-06-16
JPS473491A (nl) 1972-02-21
JPS573022B1 (nl) 1982-01-19

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