JPS5459972A - Alternating current type surface electrometer - Google Patents

Alternating current type surface electrometer

Info

Publication number
JPS5459972A
JPS5459972A JP12653677A JP12653677A JPS5459972A JP S5459972 A JPS5459972 A JP S5459972A JP 12653677 A JP12653677 A JP 12653677A JP 12653677 A JP12653677 A JP 12653677A JP S5459972 A JPS5459972 A JP S5459972A
Authority
JP
Japan
Prior art keywords
electrode
measured
vibrating
type surface
aperture
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
JP12653677A
Other languages
Japanese (ja)
Inventor
Minoru Aoki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP12653677A priority Critical patent/JPS5459972A/en
Publication of JPS5459972A publication Critical patent/JPS5459972A/en
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To reduce the number of required electrodes of the a.c. type surface electrometer and achieve the improvement in its sensitivity by making combination use of a vibrating electrode as a detecting electrode and vibrating the vibrating electrode in the direction parallel to the surface being measured thereby producing fluctuating electric fields.
CONSTITUTION: As a tuning fork 6 is excited via tuning fork driving coil 7, an electrode 5 vibrates in the direction parallel to the body to be measured 2. This turns out that the effective opposing area of the electrode 5 and aperture 3, i.e., the dielectric flux arriving at the electrode 5 from the body to be measured 2 through an aperture 3, changes with time, as a result of which displacement current (i) flows through resistance R. Since the voltage e=iR produced in the resistance R is proportional to the surface potential V to be measured, this may be used as a quantity indicating the surface potential, if necessary, by amplifying the same with an amplifier 8
COPYRIGHT: (C)1979,JPO&Japio
JP12653677A 1977-10-21 1977-10-21 Alternating current type surface electrometer Pending JPS5459972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12653677A JPS5459972A (en) 1977-10-21 1977-10-21 Alternating current type surface electrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12653677A JPS5459972A (en) 1977-10-21 1977-10-21 Alternating current type surface electrometer

Publications (1)

Publication Number Publication Date
JPS5459972A true JPS5459972A (en) 1979-05-15

Family

ID=14937620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12653677A Pending JPS5459972A (en) 1977-10-21 1977-10-21 Alternating current type surface electrometer

Country Status (1)

Country Link
JP (1) JPS5459972A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5695248A (en) * 1979-12-28 1981-08-01 Canon Inc Image forming device
JPS57133360A (en) * 1981-02-13 1982-08-18 Nec Corp Potential sensor
JPS61129583A (en) * 1984-11-29 1986-06-17 Matsushita Electric Ind Co Ltd Method for manufacturing surface potential sensor element
JPS61129579A (en) * 1984-11-29 1986-06-17 Matsushita Electric Ind Co Ltd Surface potential sensor element
JPS61140870A (en) * 1984-12-14 1986-06-27 Matsushita Electric Ind Co Ltd Manufacture of surface potential sensor element
JPH06300800A (en) * 1993-04-14 1994-10-28 Nec Corp Potential sensor
JPH06300801A (en) * 1993-04-14 1994-10-28 Nec Corp Potential sensor
JPH07134152A (en) * 1993-11-12 1995-05-23 Nec Corp Potential sensor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5695248A (en) * 1979-12-28 1981-08-01 Canon Inc Image forming device
JPS57133360A (en) * 1981-02-13 1982-08-18 Nec Corp Potential sensor
JPS61129583A (en) * 1984-11-29 1986-06-17 Matsushita Electric Ind Co Ltd Method for manufacturing surface potential sensor element
JPS61129579A (en) * 1984-11-29 1986-06-17 Matsushita Electric Ind Co Ltd Surface potential sensor element
JPS61140870A (en) * 1984-12-14 1986-06-27 Matsushita Electric Ind Co Ltd Manufacture of surface potential sensor element
JPH06300800A (en) * 1993-04-14 1994-10-28 Nec Corp Potential sensor
JPH06300801A (en) * 1993-04-14 1994-10-28 Nec Corp Potential sensor
JPH07134152A (en) * 1993-11-12 1995-05-23 Nec Corp Potential sensor

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