Title:
CONTACTLESS VOLTAGE MEASUREMENT DEVICE AND CONTACTLESS VOLTAGE MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2022/172312
Kind Code:
A1
Abstract:
The present invention provides a contactless voltage measurement device (10) that is connected to three or more probe electrodes and to the ground, and that measures the voltage applied to a conductor in a cable without having the probe electrodes come into contact with the conductor, the contactless voltage measurement device (10) comprising: a ground connection switching unit (12) that electrically forms or breaks a connection between the probe electrodes and the ground; a measurement unit (13) that measures the capacitance in each probe electrode set in a number greater than or equal to the number of probe electrodes, among probe electrode sets for which two probe electrodes from the three or more probe electrodes are combined, in a state in which the connection between the probe electrodes and the ground is broken by the ground connection switching unit (12), and that measures the voltage using the probe electrodes in a state in which the connection between the probe electrodes and the ground is formed by the ground connection switching unit (12); a capacitance calculation unit (14) that computes the capacitance between the probe electrodes and the ground using each of the measured values for capacitance obtained by the measurement unit (13); and a voltage calculation unit (15) that computes the voltage applied to a conductor line using the computed value for the capacitance obtained by the capacitance computation unit (14) and the measured value for the voltage obtained by the measurement unit (13).
Inventors:
SHIBUYA KOJI (JP)
OWADA TETSU (JP)
OWADA TETSU (JP)
Application Number:
PCT/JP2021/004688
Publication Date:
August 18, 2022
Filing Date:
February 09, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01R15/06
Domestic Patent References:
| WO2016189864A1 | 2016-12-01 | |||
| WO2016021045A1 | 2016-02-11 | |||
| WO2017168608A1 | 2017-10-05 | |||
| WO2015083618A1 | 2015-06-11 | |||
| WO2018092188A1 | 2018-05-24 | |||
| WO2021048975A1 | 2021-03-18 |
Foreign References:
| JP2006242855A | 2006-09-14 | |||
| JP2006084380A | 2006-03-30 |
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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