JPS55144557A - Surface potentiometer - Google Patents

Surface potentiometer

Info

Publication number
JPS55144557A
JPS55144557A JP5263379A JP5263379A JPS55144557A JP S55144557 A JPS55144557 A JP S55144557A JP 5263379 A JP5263379 A JP 5263379A JP 5263379 A JP5263379 A JP 5263379A JP S55144557 A JPS55144557 A JP S55144557A
Authority
JP
Japan
Prior art keywords
electrode
electric line
force
opening
chopper
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.)
Granted
Application number
JP5263379A
Other languages
Japanese (ja)
Other versions
JPS631547B2 (en
Inventor
Koji Suzuki
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP5263379A priority Critical patent/JPS55144557A/en
Priority to US06/141,885 priority patent/US4367948A/en
Priority to GB8013382A priority patent/GB2050633B/en
Priority to DE19803015859 priority patent/DE3015859A1/en
Publication of JPS55144557A publication Critical patent/JPS55144557A/en
Priority to US06/714,574 priority patent/US4683436A/en
Publication of JPS631547B2 publication Critical patent/JPS631547B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To measure a potential by a surface potentiometer by providing means for crossing a chopper electrode with the electric line of force from an opening of a shielding member, an electrode for detecting the change of the electric line of force and a circuit for producing a detection signal as an alternating signal.
CONSTITUTION: The electric line of force based on the surface change of a surface 7 to be measured is applied through a measuring opening 6 into a measuring electrode 20. A chopper electrode 3 located between the opening 6 and the electrode 20 crosses the electric line of force upon vibration of the tuning fork 1. As a result, an alternating voltage having amplitude proportional to the difference voltage between the surface potential of the surface 7 and the chopper electrode 3 of the same potential as the shielding member 5 is induced at the electrode 20. After the signal is converted into a low impedance signal via a current amplifier circuit formed by a source follower associated with a printed board 4, it is outputted externally as the output of the potentiometer.
COPYRIGHT: (C)1980,JPO&Japio
JP5263379A 1979-04-24 1979-04-28 Surface potentiometer Granted JPS55144557A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP5263379A JPS55144557A (en) 1979-04-28 1979-04-28 Surface potentiometer
US06/141,885 US4367948A (en) 1979-04-24 1980-04-21 Surface potential electrometer and image forming apparatus using the same
GB8013382A GB2050633B (en) 1979-04-24 1980-04-23 Surface potential electrometer and image forming apparatus using the same
DE19803015859 DE3015859A1 (en) 1979-04-24 1980-04-24 SURFACE POTENTIAL ELECTROMETER AND IMAGING DEVICE EQUIPPED WITH THIS
US06/714,574 US4683436A (en) 1979-04-24 1985-03-21 Surface potential electrometer and image forming apparatus using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5263379A JPS55144557A (en) 1979-04-28 1979-04-28 Surface potentiometer

Publications (2)

Publication Number Publication Date
JPS55144557A true JPS55144557A (en) 1980-11-11
JPS631547B2 JPS631547B2 (en) 1988-01-13

Family

ID=12920219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5263379A Granted JPS55144557A (en) 1979-04-24 1979-04-28 Surface potentiometer

Country Status (1)

Country Link
JP (1) JPS55144557A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204771A (en) * 1983-05-10 1984-11-20 Canon Inc Surface potential meter
JP2006003131A (en) * 2004-06-15 2006-01-05 Canon Inc Potential sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01130746U (en) * 1988-02-29 1989-09-05

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204771A (en) * 1983-05-10 1984-11-20 Canon Inc Surface potential meter
JP2006003131A (en) * 2004-06-15 2006-01-05 Canon Inc Potential sensor

Also Published As

Publication number Publication date
JPS631547B2 (en) 1988-01-13

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