Sensor Output Determination Using Temporal Variation Against Noise
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Solution Overview
Problem
Existing methods for determining abnormal output values from sensors are prone to erroneous results due to noise, particularly when noise occurs multiple times within a predetermined time frame, leading to false failure determinations.
Innovation Solution
A determining device that includes a deriving unit to calculate a degree value representing the time change of an output value, a determining unit to derive a third determination result from both the magnitude of the output value and the degree value at multiple times, and an output unit to provide the final determination result, thereby improving the precision of abnormality detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a predetermined state is determined based on a single output value from a sensor, then the determination process is simple and quick, but the precision of determination is reduced due to noise influence
Solution Approach 1:
The patent transitions from one-dimensional determination (single output value) to two-dimensional determination by introducing a time dimension. Multiple output values are collected over time, and the system evaluates both the magnitude and temporal patterns of changes, thereby improving determination precision without significantly compromising processing efficiency
Solution Approach 2:
The system performs preliminary actions by collecting multiple output values over a predetermined time period before making the final determination. This preliminary data collection allows the system to filter out noise through temporal analysis, ensuring more accurate determination results while maintaining efficient processing
2Measurement precision
If multiple output values are evaluated over time to improve determination precision, then noise influence is reduced, but the device complexity increases
Solution Approach 1:
The determination process is segmented into distinct functional units: an acquisition unit that collects output values, a determination unit that analyzes the collected data, and a notification unit that communicates results. This segmentation allows each unit to perform its specific function efficiently, reducing overall system complexity while maintaining high determination precision through temporal analysis
3Device complexity
If only the magnitude of output value is considered for determination, then the determination process is simple, but false failures occur due to noise occurring multiple times within predetermined time
Solution Approach 1:
The system dynamically evaluates output values by considering both their magnitude and temporal characteristics. Instead of using a static threshold comparison, the determination unit analyzes the rate of change and time patterns of output values, enabling the system to distinguish between actual abnormalities and transient noise while maintaining a relatively simple determination process
Data Source
AI summary
The present invention addresses the problem of providing a determining device that can improve the precision of determination as to the presence or absence of an abnormality as indicated by an output value. In order to solve this problem, a determining device according to the present invention includes a deriving means, a determining means, and an output means. The deriving means derives a degree value from an output value output from a sensor, the degree value indicating a degree of temporal variation in the output value. The determining means derives a third determination result relating to a first output value, which is the abovementioned output value, from a first determination result and a second determination result. Here, the first determination result is a determination result about the magnitude of the first output value relating to a first time, associated with the time when the sensor outputted the first output value.