JPS55144557A - Surface potentiometer - Google Patents
Surface potentiometerInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01130746U (en) * | 1988-02-29 | 1989-09-05 |
-
1979
- 1979-04-28 JP JP5263379A patent/JPS55144557A/en active Granted
Cited By (2)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE68923640D1 (en) | Device for measuring the water content of the skin. | |
EP0357013A3 (en) | Magnetic field measuring circuit | |
DE3766625D1 (en) | METHOD AND DEVICE FOR MEASURING THE DISTANCE OF TWO SURFACES MOVING RELATIVELY TO OTHER. | |
DE3467249D1 (en) | Circuit having a magnetic field sensor for measuring a magnetic field | |
JPS55144557A (en) | Surface potentiometer | |
JPS55144556A (en) | Surface potentiometer | |
JPS5459972A (en) | Alternating current type surface electrometer | |
ATE350797T1 (en) | DEVICE FOR FAULT DETECTION AND MEASURING ELECTRICAL SUPPLY LINES | |
JPS5543420A (en) | Metallic material examination device | |
JPS5478165A (en) | Measuring method of eddy corrent type displacement | |
JPS5512401A (en) | Eddy current type range finder | |
JPS55146052A (en) | Noise reduction circuit in noncontact type potentiometer | |
ATE35867T1 (en) | CIRCUIT ARRANGEMENT FOR COMPENSATION OF TRANSMISSION FACTOR FLUCTUATIONS OF A LINEAR MAGNETIC FIELD SENSOR. | |
JPS5269673A (en) | Magnetic signal detecting circuit | |
JPS55125404A (en) | Distortion gage | |
SU800912A1 (en) | Meter of modulus of four-pole parameters | |
SU669284A1 (en) | Eddy-current flaw detector | |
JPS55149848A (en) | Measuring instrument of induction system for surface electric potential | |
JPS5658666A (en) | Avometer having impedance range | |
JPS55155265A (en) | Device for measuring magnetic permeability | |
JPS5724804A (en) | Detector for crack depth | |
JPS55163460A (en) | Fluctuation indicator | |
JPS5692440A (en) | Detecting device for liquid in insulating conduit | |
JPS54135584A (en) | Electrostatic capacity type measuring apparatus | |
JPS56108963A (en) | Surface electrometer |