Sensor Signal Output Apparatus Steady State Diagnosis
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Solution Overview
Problem
Existing physical quantity detection apparatuses, such as those for angular velocity and acceleration, face issues with erroneous fault diagnosis due to communication channel noises, leading to incorrect determination of sensor signals as normal or abnormal, especially in environments with significant temperature variations and vibrations.
Innovation Solution
A sensor signal output apparatus with a diagnosis part and communication part that selectively outputs sensor detection results and operational status signals, ensuring reliable communication only when sensors are in a steady state, using a data buffer, operation determination part, and output control part to manage sensor outputs and fault diagnosis signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fault diagnosis signal is output on time-division basis, then communication bandwidth is saved, but signal reliability deteriorates due to communication channel noises causing erroneous fault diagnosis
Solution Approach 1:
The patent applies preliminary action by checking whether the sensor is in a steady state before outputting the fault diagnosis signal. The control unit determines steady state based on detection results (e.g., acceleration detection) and only outputs fault diagnosis information when the sensor is confirmed to be in a steady state. This prevents noise-induced erroneous diagnoses during transient states while maintaining efficient time-division multiplexed communication.
2Reliability
If sensor signal is output as non-steady value during breakdown, then fault detection is enabled, but false normal determination occurs due to non-faulty steady-state signals being misinterpreted
Solution Approach 1:
The patent uses feedback by continuously monitoring detection results (such as acceleration detection) to determine whether the sensor is in a steady state, and using this information to control the output of fault diagnosis signals. The control unit adjusts signal output based on feedback from the steady state determination, ensuring that fault diagnosis information is only transmitted when the sensor is in a stable operational state, thereby preventing false interpretations of non-faulty signals as abnormal.
3Adaptability or versatility
If sensor operates in harsh environment with temperature variations and vibrations, then sensor applicability is improved, but diagnostic accuracy deteriorates due to communication channel noises
Solution Approach 1:
The patent applies preliminary action by checking whether the sensor is in a steady state before outputting the fault diagnosis signal. The control unit determines steady state based on detection results (e.g., acceleration detection) and only outputs fault diagnosis information when the sensor is confirmed to be in a steady state. This prevents noise-induced erroneous diagnoses during transient states while maintaining efficient time-division multiplexed communication.
Data Source
AI summary
Provided is a sensor signal output apparatus that outputs a sensor signal at times of the sensor being in steady operation and outputs the operational status of the sensor instead of the sensor signal when the sensor is at fault or in non-steady operation in order to thereby to have a receiver machine obtain a correct sensor signal. The sensor signal output apparatus includes a sensor detecting a physical quantity, a diagnosis part diagnosing the operating state of the sensor, and a communication part transmitting the result of detection by the sensor and the result of diagnosis by the diagnosis part. When the sensor is determined to be normally operating, the communication part selectively outputs the result of detection by the sensor. When the sensor is not determined to be normally operating, the communication part selectively outputs a signal indicative of the operating state of the sensor.