US 11,789,032 B2
Inertial measurement unit
Fumikazu Otani, Matsumoto (JP); and Taketo Chino, Hokuto (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Oct. 27, 2021, as Appl. No. 17/511,997.
Claims priority of application No. 2020-181708 (JP), filed on Oct. 29, 2020.
Prior Publication US 2022/0137081 A1, May 5, 2022
Int. Cl. G01P 1/00 (2006.01); G01P 3/00 (2006.01); G01P 15/18 (2013.01)
CPC G01P 1/006 (2013.01) [G01P 3/00 (2013.01); G01P 15/18 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An inertial measurement unit comprising:
an inertial sensor that outputs inertial information;
a storage portion that stores a plurality of correction parameters related to a range of values of the inertial information;
a parameter control portion that selects a selection correction parameter from the plurality of correction parameters;
a correction calculation portion that corrects the inertial information using the selection correction parameter; and
a communication portion, wherein the parameter control portion selects at least two correction parameters as the selection correction parameter, multiplies the selected correction parameters by a weighting coefficient, and adds corresponding results, based on external information from the communication portion, wherein the external information includes at least one of an acceleration pulse signal of a moving object, a pulse per second signal, and a vehicle speed pulse signal obtained by measuring a speed of the moving object.