US 11,885,620 B2
Inertia detection device
Chao Chen, Kariya (JP); and Naoki Yoshida, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on May 24, 2022, as Appl. No. 17/664,699.
Claims priority of application No. 2021-090410 (JP), filed on May 28, 2021.
Prior Publication US 2022/0381562 A1, Dec. 1, 2022
Int. Cl. G01P 15/04 (2006.01); G01C 25/00 (2006.01); G01P 21/00 (2006.01); G01C 19/5776 (2012.01); G01P 15/18 (2013.01); G01P 15/14 (2013.01)
CPC G01C 19/5776 (2013.01) [G01C 25/005 (2013.01); G01P 15/04 (2013.01); G01P 15/14 (2013.01); G01P 15/18 (2013.01); G01P 21/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An inertia detection device comprising:
one set of inertia sensors arranged in a same physical quantity range in which sensor movement is detected as the same physical quantity, for the set of inertia sensors to detect a physical quantity along a same direction due to a movement of a detection target object, the one set of inertia sensors includes a first sensor configured to output a first output signal and a second sensor configured to output a second output signal, such that a sign of the first output signal is opposite to a sign of the second output signal, and
an abnormality determination unit configured to determine that one of the first sensor and the second sensor is abnormal in response to a sum of the first output signal and the second output signal being greater than a difference threshold, wherein
when one of the first sensor and the second sensor is determined to be abnormal, the abnormality determination unit is configured to
compare the first output signal with a first output signal threshold value,
compare the second output signal with a second output signal threshold value, and
specify which of the first sensor or the second sensor is abnormal,
wherein
the first output signal threshold value and the second output signal threshold value are determined for the first sensor and the second sensor, respectively.