Inductive Sensor Signal Processing Merging Coils
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Solution Overview
Problem
Conventional inductive position sensors face accuracy issues due to amplification and time mismatches in signal processing, leading to errors and increased complexity, size, and cost.
Innovation Solution
The design incorporates two excitation elements with specific signal functions and a single-channel signal processor that adjusts a variable parameter to minimize amplification and time mismatches, using a closed-loop system to accurately determine the angular position of a target element by generating electromagnetic fields and processing signals through a receiving element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional inductive position sensors use separate amplifiers for multiple receiver coils, then signal amplification is achieved, but amplification mismatch and time mismatch errors occur, increasing device complexity and cost
Solution Approach 1:
The patent combines multiple receiver coils into a single receiver coil that detects the combined signal from all excitation coils. This eliminates the need for multiple separate amplifiers and signal processing channels, thereby removing amplification mismatch and time mismatch errors while reducing device complexity and cost.
Solution Approach 2:
The single receiver coil serves multiple functions by detecting signals from all excitation coils simultaneously. This universal approach allows one component to perform what previously required multiple specialized components, simplifying the overall system architecture.
2Device complexity
If conventional inductive position sensors use time-division multiplexing with a single amplifier, then device complexity is reduced, but time mismatch errors occur and processing speed decreases
Solution Approach 1:
The patent merges the detection of multiple excitation coil signals into a single receiver coil that captures all signals simultaneously. This eliminates the need for time-division multiplexing, thereby removing time mismatch errors while maintaining simple device architecture.
3Measurement precision
If conventional inductive position sensors use multiple receiver coils, then position detection capability is improved, but amplification mismatch errors occur, increasing cost and complexity
Solution Approach 1:
The patent combines multiple receiver coils into a single receiver coil that detects the combined magnetic field from all excitation coils. This maintains the ability to detect angular position through signal processing while eliminating amplification mismatch errors and reducing device complexity.
4Ease of operation
If conventional inductive position sensors use separate signal processing channels, then individual signal processing is achieved, but time mismatch errors occur, increasing processing time
Solution Approach 1:
The patent merges all signal detection into a single receiver coil that captures signals from all excitation coils simultaneously. This eliminates the need for sequential time-division multiplexing, thereby removing time mismatch errors and reducing signal processing time while maintaining full signal processing capability.
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 approach eliminates amplification and time mismatches, resulting in a more accurate, cost-effective, and simplified inductive position sensor with reduced errors, suitable for various industrial applications.
Implementation Method 1
Each excitation element can generate an electromagnetic field in response to a signal provided thereto
Implementation Method 2
The target is configured to affect the electromagnetic fields generated by the excitation elements as a function of an angular position of the target
Data Source
AI summary
In one embodiment, an electronic device includes an excitation control; a first excitation element coupled to the excitation control; a second excitation element coupled to the excitation control; a target positioned near the first and second excitation elements and within the electromagnetic fields generated by the first and second excitation elements; a receiving element positioned near the target and within the electromagnetic fields generated by the first and second excitation elements; and a signal processor coupled to the receiving element and coupled to the excitation control.