US 12,247,995 B2
Sensor module and measurement system
Fumikazu Otani, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 30, 2022, as Appl. No. 17/708,263.
Claims priority of application No. 2021-062997 (JP), filed on Apr. 1, 2021.
Prior Publication US 2022/0317146 A1, Oct. 6, 2022
Int. Cl. G01P 15/08 (2006.01); G01C 19/5776 (2012.01); G01C 21/16 (2006.01); G01P 3/00 (2006.01); G01P 15/18 (2013.01)
CPC G01P 15/08 (2013.01) [G01C 19/5776 (2013.01); G01C 21/16 (2013.01); G01P 3/00 (2013.01); G01P 15/18 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sensor module comprising:
a plurality of inertial measurement units, each of the plurality of inertial measurement units having an angular velocity sensor device, an acceleration sensor device, and a signal processing circuit configured to process an output signal from the angular velocity sensor device and the acceleration sensor device;
an oscillation circuit configured to generate a synchronizing clock which synchronizes the plurality of inertial measurement units; and
a mounting board on which the plurality of inertial measurement units are mounted, the mounting board being a planar member having a planar surface on which the plurality of inertial measurement units are mounted, and the plurality of inertial measurement units are arranged on the planar surface of the mounting board at a distance from each other, each of the plurality of inertial measurement units being mounted at a respective corner of the mounting board such that the signal processing circuit of each of the plurality of inertial measurement units are also arranged at the respective corner,
wherein the signal processing circuit of each of the plurality of inertial measurement units includes a processor, the angular velocity sensor device of each of the plurality of inertial measurement units includes a first analog-to-digital conversion circuit, and the acceleration sensor device of each of the plurality of inertial measurement units includes a second analog-to-digital conversion circuit,
the signal processing circuit of at least one of the plurality of inertial measurement units is configured to process the output signal from only one of the angular velocity sensor device and the acceleration sensor device, such that the signal processing circuit of the at least one of the plurality of inertial measurement units is configured to modify data associated with the output signal prior to output of the data from the at least one of the plurality of inertial measurement units, and
the signal processing circuit of at least another one of the plurality of inertial measurement units, which is different than the at least one of the plurality of inertial measurement units, is configured to process the output signal from only another one of the angular velocity sensor device and the acceleration sensor device, such that the signal processing circuit of the at least another one of the plurality of inertial measurement units is configured to modify data associated with the output signal prior to output of the data from the at least another one of the plurality of inertial measurement units.