inertial sensor module

By using first and second sensors in the inertial sensor module and performing sensitivity conversion through processing circuitry, the complex adjustment problem caused by inconsistent sensitivity of multiple sensors is solved, achieving unified sensitivity output of sensor data, which is suitable for various detection environments.

CN115900694BActive Publication Date: 2026-07-17SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SEIKO EPSON CORP
Filing Date
2022-09-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

When multiple inertial sensors with different sensitivities are mounted on the baseboard of a host device, it is difficult to uniformly adjust the sensitivity of the sensors, leading to complexity.

Method used

An inertial sensor module including a first sensor and a second sensor is used. The first sensor detects physical quantities on the first and second detection axes with a first sensitivity, and the second sensor detects physical quantities on the third detection axis with high precision and different sensitivity. The sensitivity is converted by the processing circuit to ensure that all physical quantities are output with a uniform sensitivity.

Benefits of technology

It simplifies the uniform sensitivity adjustment of sensor data without changing the connection side specifications, and can output acceleration and angular velocity data with uniform sensitivity, making it suitable for various detection environments.

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    Figure CN115900694B_ABST
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Abstract

Provided is an inertial sensor module that does not require sensitivity adjustment on the host side. The inertial sensor module (100) includes a first sensor (110), a second sensor (120), and a processing circuit (130). The first sensor (110) detects a first physical quantity (P1) on a first detection axis and a second physical quantity (P2) on a second detection axis with a first sensitivity. The second sensor (120) detects a third physical quantity (P3) on a third detection axis with a second sensitivity that is higher in precision than the first sensor and different from the first sensitivity. The processing circuit (130) performs an arithmetic process that converts the first physical quantity (P1) and the second physical quantity (P2) of the first sensitivity and the third physical quantity (P3) of the second sensitivity into a first physical quantity (PP1), a second physical quantity (PP2), and a third physical quantity (PP3) of a prescribed sensitivity.
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