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:
May. 26, 2015
Filed:
Feb. 16, 2012
Hideaki Naruse, Iida, JP;
Satoru Miyamoto, Iida, JP;
Masaki Fujii, Iida, JP;
Kazushi Kodaira, Iida, JP;
Yoshihiro Ikushima, Iida, JP;
Hideaki Naruse, Iida, JP;
Satoru Miyamoto, Iida, JP;
Masaki Fujii, Iida, JP;
Kazushi Kodaira, Iida, JP;
Yoshihiro Ikushima, Iida, JP;
OMRON AUTOMOTIVE ELECTRONICS CO., LTD., Aichi, JP;
Abstract
An electric leakage detection apparatus may quickly detect an electric leakage. An electric leakage detection apparatus includes a pulse generator that supplies a pulse to a coupling capacitor, a voltage detector that detects a voltage at the coupling capacitor, an electric leakage determination unit that compares the voltage detected by the voltage detector to a first threshold and determines presence or absence of the electric leakage of a DC power supply based on a comparison result. The electric leakage detection apparatus also includes a discharge determination unit that compares the voltage detected by the voltage detector to a second threshold lower than the first threshold and determines whether the detection voltage becomes lower than the second threshold by a discharge of the coupling capacitor. The pulse generator generates a new pulse when the discharge determination unit determines that the detection voltage becomes lower than the second threshold.