# US 2025/0093380 A1 · Inertial sensor device

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- Number: US 2025/0093380 A1
- Document ID: US20250093380A1
- Status: Published application
- Kind: A1
- Application number: 18/971,569
- Filed: 2024-12-06
- Published: 2025-03-20
- Earliest claimed: 2021-12-24
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Yasunori Hiyoshi
- Web page: https://patentgrep.com/patent/US20250093380A1

## CPC

- G01P 1/023: {for acceleration measuring devices}
- G01P 15/16: by evaluating the time-derivative of a measured speed signal
- G01C 21/16: by integrating acceleration or speed, i.e. inertial navigation
- G01P 15/18: in two or more dimensions
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})
- G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S)

## Abstract

The inertial sensor device is an inertial sensor device including a plurality of inertial measurement modules, and includes: a clocking unit; a storage unit configured to store detection data from each of the plurality of inertial measurement modules in association with a time point of the clocking unit; and a synthesis processing unit configured to calculate interpolation data at a predetermined time point based on the detection data from each of the plurality of inertial measurement modules at at least two time points, and synthesize, using the interpolation data for each of the plurality of inertial measurement modules, output data at the predetermined time point.

## Claims

### Claim 1

An inertial sensor device including a plurality of inertial measurement modules, the inertial sensor device comprising:
a clocking unit;
a storage unit configured to store detection data from each of the plurality of inertial measurement modules in association with a time point of the clocking unit; and
a synthesis processing unit configured to calculate detection data at a predetermined time point, using a first time point when each of the multiple inertial measurement modules detects first detection data and a second time point when each of the multiple inertial measurement modules detects second detection data, by adding an error change amount obtained by multiplying a slope of the first detection data and the second detection data by a difference between the first time point and the second time point to the first detection data, and to synthesize detection data at the predetermined time point for each of the multiple inertial measurement modules.

### Claim 2 (depends on 1)

The inertial sensor device according to claim 1, wherein
the predetermined time point is a time point after the first time point and the second time point.

### Claim 3 (depends on 1)

The inertial sensor device according to claim 1, wherein
the predetermined time point is a time point before the first time point and the second time point.

### Claim 4

An inertial sensor device including a plurality of inertial measurement modules having a first inertial measurement module, the inertial sensor device comprising:
a clocking unit;
a storage unit configured to store detection data from each of the plurality of inertial measurement modules in association with a time point of the clocking unit; and
a synthesis processing unit configured to calculate detection data at a predetermined time point, using a first time point when first inertial measurement module detects first detection data and a second time point when first inertial measurement module detects second detection data, by adding an error change amount obtained by multiplying a slope of the first detection data and the second detection data by a difference between the first time point and the second time point to the first detection data, and to synthesize detection data using the detection data at a predetermined time point for the first inertial measurement module.