Power Steering Device Multi-Sensor Abnormality Detection
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Solution Overview
Problem
Conventional power steering devices can detect water entry but fail to adequately determine abnormalities caused by foreign matter such as sand or dust, as they cannot detect these substances effectively.
Innovation Solution
The power steering device incorporates a steering mechanism, an electric motor, a transmission mechanism, a housing, a water sensing element, a torque sensor, and multiple abnormality determination parts to assess steering torque, rotational speed, and steering speed, enabling comprehensive abnormality detection beyond water presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a water sensor is used to detect water entry, then water detection capability is improved, but detection of foreign matter such as sand or dust remains insufficient
Solution Approach 1:
The patent applies multi-functionality by implementing multiple abnormality determination methods within a single power steering device. The system uses both water sensor-based detection and torque sensor-based detection to cover different types of abnormalities (water entry and foreign matter entry), making the overall system more universal in its detection capabilities rather than relying on a single detection method
2Reliability
If multiple abnormality determination methods are implemented, then detection comprehensiveness is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple detection approaches by integrating the water sensor detection system with the torque sensor detection system into a unified abnormality determination framework. The control unit coordinates both detection methods, combining their outputs to achieve comprehensive abnormality determination while managing system complexity through integrated control logic
Data Source
AI summary
A device for controlling a power steering device having: a steering mechanism for transmitting the rotation of a steering wheel to steered wheels; an electric motor for imparting steering force to the steering mechanism; a transmission mechanism for transmitting the rotational force of the motor to the steering mechanism; a housing for accommodating at least part of the steering mechanism, the transmission mechanism, and the motor; a water sensor for detecting moisture in the housing; and a torque sensor for detecting steering torque; wherein the control device is provided with a first fault assessment unit for assessing faults in the power steering device on the basis of a steering torque signal, etc., and a second fault assessment unit for assessing faults in the power steering device when the water sensor has sensed moisture. It is thereby possible to assess faults in the power steering device from a multifaceted perspective.