公开(公告)号：US20230205165A1

公开(公告)日：2023-06-29

申请号：US17712372

申请日：2022-04-04

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Chih-Kai CHIU ,  Bo-Ting YEH ,  Tsan-Huang CHEN

IPC: G05B19/401

CPC classification number: G05B19/4015 ,  G05B2219/34013 ,  G05B2219/41095

Abstract: The present disclosure discloses a servo motor and an encoder calibration method. The encoder calibration method includes: calculating a gain error, an offset error and a phase error, by an error calculation block, according to a first signal and a second signal output by an encoder; calculating at least one gain calibration parameter, at least one offset calibration parameter and at least one phase calibration parameter, by the error calibration block, according to the gain error, the offset error and the phase error; and calibrating sequentially, by the encoder, the gain, the offset and the phase of the first signal and the second signal according to the at least one gain calibration parameter, the at least one offset calibration parameter and the at least one phase calibration parameter, wherein performing at least one gain calibration and offset calibration after the phase calibration is completed.

公开(公告)号：US20210199468A1

公开(公告)日：2021-07-01

申请号：US16917272

申请日：2020-06-30

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Tsan-Huang CHEN ,  Yu-Chen LEE ,  Chung-Lin TSENG ,  Jyun-Liang LAI ,  Yi-Ting WANG

IPC: G01D5/12 ,  H03M1/12 ,  H03H7/06

Abstract: An encoder and a signal processing method are disclosed. The method includes: receiving an analog signal, and generating a filtered analog signal by an analog filter according to the input signal and a first frequency indication signal; generating a digital signal by an analog-to-digital converter according to the filtered analog signal; generating a filtered digital signal by a digital filter according to the digital signal and a second frequency indication signal; generating a seventh signal and an eighth signal by a dynamic offset calibration unit according to the filtered digital signal and a period indication signal; and generating a position information by a position detection unit according to the seventh signal and the eighth signal. The first frequency indication signal, the second frequency indication signal and the period indication signal are generated by a frequency generation module according to the filtered analog signal or the digital signal.

公开(公告)号：US20240151779A1

公开(公告)日：2024-05-09

申请号：US18101970

申请日：2023-01-26

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Yu-Hong SHEN ,  Po-Wei CHEN ,  Tsan-Huang CHEN

IPC: G01R31/392 ,  G01R31/3835 ,  H02J7/00

CPC classification number: G01R31/392 ,  G01R31/3835 ,  H02J7/005

Abstract: A method for calculating state of health of battery, performed by a processing control circuit, includes: charging a battery under test to an upper voltage with a first constant current through a charging circuit and an electrical measuring circuit, discharging the battery under test to a lower voltage with a second constant current through the charging circuit and the electrical measuring circuit, obtaining an accumulated discharge capacity from the upper voltage to the lower voltage through the electrical measuring circuit, and calculating a state of health of the battery under test at least according to the accumulated discharge capacity and a design capacity.