Position Sensor Merging Dual Detection Systems
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Solution Overview
Problem
Conventional position sensors with dual detection systems require multiple output terminals, leading to increased complexity and wire connections, making them unreliable and costly to maintain, especially when the number of switches doubles.
Innovation Solution
A position sensor design that maintains a three-terminal configuration (power supply, ground, and output) by incorporating a dual detection system within the signal processing portion, where a first and second detection element output signals are processed to determine the position and failure, with a single output terminal for position or failure information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual detection system is implemented to improve reliability, then the reliability of position detection is improved, but the number of output terminals and wire connections increases
Solution Approach 1:
The patent combines two detection systems (first and second detection elements) into a single integrated sensor unit that shares common terminals. The signal processing portion integrates both detection signals and processes them together, allowing dual-system reliability with reduced terminal count compared to separate independent detection systems.
Solution Approach 2:
The single output terminal serves multiple functions by outputting different signal types (first output signal from first detection element, second output signal from second detection element, and third output signal from signal processing portion) depending on the operational mode. This multi-functionality allows the same terminal to handle various detection and communication tasks.
2Loss of information
If multiple output terminals are used to provide comprehensive position and failure information, then the information completeness is improved, but the wire connections and system complexity increase
Solution Approach 1:
The signal processing portion selectively outputs different types of signals (first output signal, second output signal, or third output signal) based on operational conditions and failure states. This conditional signal selection allows comprehensive information to be transmitted through a single terminal by varying the signal type rather than using multiple dedicated terminals for each signal type.
3Reliability
If a dual detection system with separate output terminals is used, then the detection reliability is improved, but the cost and maintenance difficulty increase
Solution Approach 1:
By merging the two detection systems into a single integrated unit with shared terminals and common signal processing, the patent reduces the number of independent components that require maintenance. The integrated design simplifies troubleshooting and repair compared to separate independent detection systems while maintaining the redundancy benefits of dual detection.
Data Source
AI summary
A position sensor including: a power supply terminal to which a power supply voltage is applied; a ground terminal to which a ground voltage is applied; an output terminal that outputs a signal; a detection portion that operates based on the power supply voltage and the ground voltage, and detects a position of a detection target by a magnetic resistance element whose resistance value changes according to a movement of the detection target; and a signal processing portion that operates based on the power supply voltage and the ground voltage, and processes a signal input from the detection portion.