MEMS Sensor Response Coefficient Diagnostic System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing diagnostic methods for MEMS sensors lack a systematic approach to verify the successful rewrite and update of response coefficients in the response function, which is crucial for ensuring accurate sensor performance.
Innovation Solution
A diagnostic method and system for MEMS sensors that includes a rewrite control step, an update control step, a generation control step, and a determination step. This method involves rewriting and updating response coefficients and generating a test output signal to determine if it falls within an allowable range specified by the test input signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a diagnostic method is implemented to verify rewrite and update of response coefficients, then reliability is improved, but device complexity increases
Solution Approach 1:
The diagnostic system utilizes existing functional units within the MEMS sensor (signal generation unit, signal processing unit, storage unit) to perform both normal sensor operation and self-diagnosis functions. The response coefficient verification process reuses the same hardware components that process actual sensor signals, eliminating the need for separate dedicated diagnostic hardware and thereby avoiding increased device complexity while maintaining improved reliability through systematic verification capability.
2Adaptability or versatility
If response coefficient rewrite and update processes are implemented, then adaptability is improved, but loss of information increases
Solution Approach 1:
The diagnostic system performs preliminary verification by generating test signals and processing them through the signal processing unit before finalizing the response coefficient update. The storage unit retains the ability to store multiple response coefficients, and the diagnostic process verifies the new coefficients against expected outcomes before confirming the update, thereby preventing information loss by ensuring the rewrite operation produces correct results.
Solution Approach 2:
The diagnostic system implements a feedback mechanism where test signals are processed using the updated response coefficients, and the output is verified against expected ranges. If the verification fails, the system can indicate that the update was unsuccessful, allowing for corrective action. This feedback loop prevents permanent loss of information by ensuring that only verified correct updates are committed.
Data Source
AI summary
A rewrite control step includes causing, in response to a rewrite instruction of the response coefficient from an external system, a storage to execute a rewrite process of rewriting the response coefficient from a first response coefficient to a second response coefficient. An update control step includes causing a circuit unit to execute an update process of updating the circuit unit from the first response coefficient to the second response coefficient. A generation control step includes, after the update control step, causing a digital circuit unit to execute a generation process of generating a test output signal according to a test input signal input to a MEMS element or an analog circuit unit. A determination step includes executing a determination process of determining whether or not the test output signal falls within an allowable range specified by the test input signal.