The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2025
Filed:
Dec. 01, 2021
Nitto Kogyo Corporation, Nagakute, JP;
Atsushi Miyamoto, Nagakute, JP;
Tomonori Kakehi, Nagakute, JP;
Yusuke Aita, Nagakute, JP;
Koichiro Kato, Nagakute, JP;
Tomoyasu Sakai, Nagakute, JP;
Hiyori Ajioka, Nagakute, JP;
Hiroyasu Ito, Nagakute, JP;
NITTO KOGYO CORPORATION, Nagakute, JP;
Abstract
Provided is a discharge detector for detecting discharge occurred in a circuit with an electrically connected load based on a noise in a high frequency band superimposed on an alternating current power source supplied to the circuit. The discharge detector includes a high pass filter configured to extract a frequency component in a high frequency band from the alternating current power source; an amplifier configured to amplify an output of the high pass filter; a smoothing section configured to smooth an output of the amplifier; a phase division section configured to specify a peak time domain including time before and after a peak value and a zero cross time domain including time before and after a 0 value based on a value in one cycle of a voltage or current of the alternating current power source; and a determination section configured to determine whether discharge has occurred based on a difference between a first output of the smoothing section in the peak time domain and a second output of the smoothing section in the zero cross time domain.