US 12,259,423 B2
Discharge detector with learning mode for resetting settings to detecting occurrence of discharge
Atsushi Miyamoto, Nagakute (JP)
Assigned to NITTO KOGYO CORPORATION, Nagakute (JP)
Appl. No. 18/019,591
Filed by NITTO KOGYO CORPORATION, Nagakute (JP)
PCT Filed Aug. 3, 2021, PCT No. PCT/JP2021/028685
§ 371(c)(1), (2) Date Feb. 3, 2023,
PCT Pub. No. WO2022/030466, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 2020-133522 (JP), filed on Aug. 6, 2020.
Prior Publication US 2023/0358800 A1, Nov. 9, 2023
Int. Cl. G01R 31/14 (2006.01); G01R 29/26 (2006.01); G01R 31/12 (2020.01)
CPC G01R 31/14 (2013.01) [G01R 29/26 (2013.01); G01R 31/1272 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A discharge detector for detecting discharge occurred in an electrical circuit with an electrically connected load based on a noise superimposed on a voltage or current, the discharge detector comprising:
a filter circuit configured to pass the noise in a predetermined frequency range; an amplifier configured to amplify a level of the noise passed through the filter circuit; a processor configured to detect occurrence of discharge based on the noise level amplified by the amplifier; and a storage medium containing a program for operating the processor, wherein
the program is set to have a threshold related to the noise level and a determination time related to a duration time of the noise,
the processor is configured to selectively execute either one of a discharge detection mode or a learning mode according to the program,
the processor in the discharge detection mode is configured to determine whether discharge has occurred by comparing the duration time of the noise at a level of the threshold or more with the determination time, and
the processor in the learning mode is configured to execute steps of:
comparing the level of the noise with the threshold;
measuring the duration time of the noise if the level of the noise is the threshold or more; and
resetting a value of the determination time to a value more than the noise duration time.