Inertial Sensor Sub-Element Failure Diagnosis
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Solution Overview
Problem
Existing inertial sensors face challenges in improving reliability without complicating their structure, particularly in the context of angular velocity sensors where failure diagnosis is essential but requires additional components that complicate the sensor's structure.
Innovation Solution
The inertial sensor incorporates a sub-inertial force detection element that detects inertial forces along a second predetermined axis intersecting the main axes, allowing for failure diagnosis of main inertial force detection elements and potentially replacing them, thus improving reliability without adding complexity to the sensor's structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal is added to the IC chip for external supply of check signals to enable failure diagnosis, then reliability is improved, but device complexity increases
Solution Approach 1:
The existing terminal on the IC chip is made multi-functional by supplying both power supply signals and check signals through the same terminal. This eliminates the need for additional dedicated terminals while enabling failure diagnosis functionality, thus improving reliability without increasing device complexity.
Solution Approach 2:
The patent combines the power supply signal function and check signal function into a single terminal structure. By merging these functions, the design avoids adding separate terminals or structures, maintaining simplicity while achieving failure diagnosis capability.
2Reliability
If additional components are added to enable failure diagnosis, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The existing terminal structure is made multi-functional to serve both power supply and check signal input purposes. This approach enables failure diagnosis without requiring additional manufacturing steps or components, thereby maintaining ease of manufacture while improving reliability.
Solution Approach 2:
The existing terminal and IC chip structure is utilized to provide failure diagnosis functionality without requiring external additional components. The system uses its existing structure to achieve the diagnostic function, simplifying the manufacturing process.
Data Source
AI summary
An inertial sensor includes: a plurality of inertial force detection elements each configured to output an output signal corresponding to a detected inertial force; and a processor configured to execute processing relating to the output signal from each of the plurality of inertial force detection elements. The plurality of inertial force detection elements includes: a plurality of main inertial force detection elements configured to detect inertial forces of a plurality of first predetermined axes orthogonal to each other; and a sub-inertial force detection element configured to detect an inertial force of a second predetermined axis which intersects the plurality of first predetermined axes such that the second predetermined axis is orthogonal to none of the plurality of first predetermined axes.