Angular Speed Sensor Temperature Fault Detection
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Solution Overview
Problem
Existing inertial force detection apparatuses face challenges in accurately detecting failures in temperature sensors, which can lead to erroneous correction of angular velocity sensor outputs, necessitating a more reliable failure detection mechanism.
Innovation Solution
An inertial force detection apparatus that includes a unit to control an oscillating body into a resonant state, a temperature detection unit, and a failure detection unit, capable of sequentially outputting failure detection results from a single signal line, enhancing the accuracy of temperature sensor failure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is added to correct temperature characteristics of the angular velocity sensor, then temperature compensation accuracy is improved, but the risk of erroneous correction due to sensor failure increases
Solution Approach 1:
The patent implements a feedback mechanism where the temperature sensor output is continuously monitored and fed back to the determination unit. This feedback loop enables real-time detection of abnormal temperature changes that indicate sensor failure, allowing the system to prevent erroneous temperature compensation corrections while maintaining accurate temperature characteristic correction during normal operation.
Solution Approach 2:
The patent performs preliminary failure detection by monitoring temperature sensor output before applying temperature compensation correction. The determination unit proactively identifies sensor failures through predetermined determination values, preventing erroneous corrections before they occur rather than detecting them after the fact.
2Reliability
If multiple signal lines are used to output failure detection results, then reliability of failure detection is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple failure detection results from different determination units into a single output signal line. The output unit combines the failure detection results, allowing the system to maintain high reliability through multiple monitoring mechanisms while reducing device complexity by consolidating outputs to a single signal line.
Solution Approach 2:
The single output signal line serves multiple functions: it outputs failure detection results from the temperature sensor, resonant frequency determination, and other monitoring units. This multi-functional output line reduces the need for separate dedicated output lines for each failure detection mechanism, simplifying the overall device structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for more accurate detection of temperature sensor failures, preventing erroneous corrections and ensuring the reliability of angular velocity sensor outputs.
Implementation Method 1
an oscillating body oscillating in a first direction is displaced in a second direction due to generation of angular velocity
Implementation Method 2
a control unit that controls the oscillating body to be in a resonant state in the first direction
Data Source
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AI summary
The purpose of the present invention is to provide an inertial force detection device that can more accurately detect faults in a temperature sensor. Provided is an inertial force detection device configured so that in a state where an oscillating body is made to oscillate in a first direction, the amount of displacement when the oscillating body is displaced in a second direction due to the generation of angular velocity is detected as angular velocity, wherein the inertial force detection device has a means for performing control so that the oscillating body enters a state of resonance in the first direction, a temperature detection means for detecting temperature, and a means for detecting faults in the temperature detection means, and outputs a plurality of signals, which indicate the fault detection results of the three means, continuously from a single signal wire.