Title:
ZERO-CROSSING DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/146767
Kind Code:
A1
Abstract:
In this zero-crossing detection device 1: an integral calculation unit 140 calculates integrals of an alternating-current signal, and records four integrals S1' to S4' in a recording unit 150; and a zero-crossing detection unit 160 determines the maximum value of said S1' to S4', and detects zero-crossings of the alternating-current signal by an arithmetic expression corresponding to the determination result. Thus, it is possible to provide a zero-crossing detection device that uses a general-purpose input circuit, and that is less likely to be affected by noise and can be used for other purposes.
Inventors:
YURUGI NORIKAZU (JP)
Application Number:
PCT/JP2017/004724
Publication Date:
August 16, 2018
Filing Date:
February 09, 2017
Export Citation:
Assignee:
RKC INSTRUMENTS INC (JP)
International Classes:
G01R19/175
Foreign References:
| JPS59200521A | 1984-11-13 | |||
| JP2012154764A | 2012-08-16 | |||
| JPH1010163A | 1998-01-16 | |||
| JPH07509051A | 1995-10-05 | |||
| JP2006258698A | 2006-09-28 | |||
| JP2007232571A | 2007-09-13 | |||
| JPH05322941A | 1993-12-07 |
Attorney, Agent or Firm:
KATO, Masanobu et al. (JP)
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