Title:
MEASUREMENT DEVICE AND MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2023/085057
Kind Code:
A1
Abstract:
The present invention achieves a measurement device capable of highly accurate synchronous detection, while suppressing cost. A measurement device (100) is characterized by comprising: a current generation circuit (1) for generating a constant alternating current corresponding to a reference signal (Ss) having a prescribed frequency, and supplying the same to a measurement target object (200); a voltage detection circuit (2) for detecting a voltage v generated across the measurement target object (200); a signal generation circuit (3) for detecting a current i flowing through the measurement target object (200), and generating a binary signal (Sip) synchronized to the current i; a first synchronous detection unit (6) for performing synchronous detection of the voltage v on the basis of the reference signal (Ss), and calculating an amplitude |V| and a voltage phase difference φv of the voltage v; a second synchronous detection unit (7) for performing synchronous detection of the binary signal (Sip) on the basis of the reference signal (Ss), and calculating a current phase difference φi; and a computation unit (8) for calculating an electrical property of the measurement target object on the basis of the amplitude |V| and the voltage phase difference φv of the voltage, the current phase difference φi, and an amplitude |I| of the current.
Inventors:
HANEDA KAZUAKI (JP)
YOKOYAMA TAKAHIRO (JP)
YOKOYAMA TAKAHIRO (JP)
Application Number:
PCT/JP2022/039459
Publication Date:
May 19, 2023
Filing Date:
October 24, 2022
Export Citation:
Assignee:
HIOKI ELECTRIC WORKS (JP)
International Classes:
G01R27/02
Domestic Patent References:
| WO2020095471A1 | 2020-05-14 |
Foreign References:
| JP2015122701A | 2015-07-02 | |||
| JP2018036205A | 2018-03-08 | |||
| JPH06109783A | 1994-04-22 | |||
| JP2015014469A | 2015-01-22 | |||
| JP2020012721A | 2020-01-23 | |||
| JP2007132806A | 2007-05-31 |
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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