Multi-Portion Sensor Circuit for Detection Stability
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Solution Overview
Problem
Existing sensors using MEMS elements face challenges in achieving stable detection due to variations in detection element characteristics when current is supplied, leading to potential failures or reduced lifetime.
Innovation Solution
A sensor design incorporating a detection device with multiple detection portions and a circuit portion that executes operations based on evaluation values, switching between detection portions when evaluation values are outside predetermined ranges, ensuring stable detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current is supplied to the detection element to enable detection operation, then detection function is activated, but detection element characteristics vary leading to potential failures and reduced lifetime
Solution Approach 1:
The detection device is divided into multiple independent detection portions (first detection portion with first detection element, second detection portion with second detection element). Each detection portion can operate independently, and when one detection element shows characteristic variations or fails, the system can switch to another detection portion, thereby maintaining reliable detection operation while extending the effective lifetime of the detection system.
2Reliability
If multiple detection portions are added to ensure stable detection, then detection reliability improves, but device complexity increases
Solution Approach 1:
Multiple detection portions are designed with identical or similar structures and functions, each capable of performing the same detection task. This universal design allows the system to switch between detection portions based on their operational status, maintaining detection reliability without requiring fundamentally different or complex additional components. The circuit portion manages the switching logic, keeping the overall system manageable despite having multiple detection elements.
Data Source
AI summary
According to one embodiment, a sensor includes a detection device and a circuit portion. The detection device includes a first detection portion and a second detection portion. The first detection portion includes a first detection element. The first detection element includes a first conductive member and a first detection member. The second detection portion includes a second detection element. The second detection element includes a second conductive member and a second detection member. The circuit portion is configured to execute a first detection portion operation for outputting a first detection result corresponding to a first detection value based on the first detection member when a first current is supplied to the first conductive member. In a case where a first evaluation value is not within a first range, the circuit portion is configured to execute a second detection portion operation by the second detection portion.