Sensor Signal Processing Circuit for Failure Diagnosis Accuracy
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Solution Overview
Problem
Existing sensor failure prediction systems lack clarity on how failure prediction information and detection signals are generated, specifically regarding the processor configuration.
Innovation Solution
A circuit device comprising a drive circuit, detection circuit, DSP for digital signal processing, storage unit with a program, and CPU for temperature correction and failure diagnosis, which cooperatively process detection data to enhance prediction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a processor is used to generate failure prediction information based on detection signals, then the ability to predict sensor failure is improved, but the clarity of how failure prediction information and detection signals are generated remains insufficient
Solution Approach 1:
The patent segments the processor into distinct functional units: a detection signal generation unit that processes raw sensor signals, a digital signal processing unit that filters and conditions signals, and a failure prediction unit that analyzes processed signals. This segmentation clarifies the information flow and processing mechanism while maintaining reliable failure prediction capability.
Solution Approach 2:
The patent introduces intermediate processing stages with defined interfaces between the detection circuit, DSP, and CPU. Detection data serves as an intermediary between the raw detection signal and the failure prediction analysis, making the information transformation process transparent and traceable.
2Measurement precision
If digital signal processing and temperature correction are performed to improve detection accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the digital signal processing functions and temperature correction functions within a single integrated processor architecture. The DSP handles signal filtering and processing while the CPU performs temperature correction and failure diagnosis, merging multiple functions into one cohesive system that improves precision without proportionally increasing complexity.
Solution Approach 2:
The processor is designed with multi-functional capabilities, where the same hardware resources are used for both digital signal processing and temperature correction operations. This universal design allows the system to perform multiple functions without requiring separate dedicated circuits for each function.
Data Source
AI summary
A circuit device includes a drive circuit that drives a physical quantity transducer, a detection circuit that detects a physical quantity based on a detection signal from the physical quantity transducer to output detection data of the physical quantity, a DSP that performs a digital signal process including a digital filtering process on the detection data, a storage unit that stores a program in which a plurality of instructions is written, and a CPU that operates based on the program and performs at least one of a temperature correction operation of the detection data and a failure diagnosis.