JPS56164965A - Noncontact type electrometer - Google Patents

Noncontact type electrometer

Info

Publication number
JPS56164965A
JPS56164965A JP6778980A JP6778980A JPS56164965A JP S56164965 A JPS56164965 A JP S56164965A JP 6778980 A JP6778980 A JP 6778980A JP 6778980 A JP6778980 A JP 6778980A JP S56164965 A JPS56164965 A JP S56164965A
Authority
JP
Japan
Prior art keywords
aperture
casing
power source
external layer
probe
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
JP6778980A
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 JP6778980A priority Critical patent/JPS56164965A/en
Publication of JPS56164965A publication Critical patent/JPS56164965A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
    • G01R15/165—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices measuring electrostatic potential, e.g. with electrostatic voltmeters or electrometers, when the design of the sensor is essential

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To make the use of a standard power source possible and lower its cost by forming an external part consisting of a metallic material on the peripheral part of the aperture on the outside surface of a casing, and applying output high voltage which is negatively fed back only to this external layer. CONSTITUTION:An aperture 2a of a diameter Da is formed on the surface 2b opposing to an object to be measured 3 in the casing 2 of a probe 1. An external layer 5 consisting of a metallic material is provided by way of an insulating material 4 to the peripheral part of this aperture 2a, and the output high voltage Vf of the electrometer is negatively fed back and applied to this external layer. On the other hand, a detecting electode 6 is provided in opposition to the aperture 2a to the inside of the casing 2, and a vibrating electrode 7 is interposed between both. Thereby, the use of a standard power source as a power source for drivng the buffer amplifier or the like in the probe is made possible and the cost is lowered.
JP6778980A 1980-05-23 1980-05-23 Noncontact type electrometer Pending JPS56164965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6778980A JPS56164965A (en) 1980-05-23 1980-05-23 Noncontact type electrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6778980A JPS56164965A (en) 1980-05-23 1980-05-23 Noncontact type electrometer

Publications (1)

Publication Number Publication Date
JPS56164965A true JPS56164965A (en) 1981-12-18

Family

ID=13355065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6778980A Pending JPS56164965A (en) 1980-05-23 1980-05-23 Noncontact type electrometer

Country Status (1)

Country Link
JP (1) JPS56164965A (en)

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