Multi-Target Position Detection With Side-by-Side Receiver Coils
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Solution Overview
Problem
Existing position detection devices face interference issues where one target's influence affects the output value of the receiver coil used to detect the position of another target, particularly in applications where targets reciprocate within a limited operating range.
Innovation Solution
A position detection device is configured with a substrate that faces both targets, featuring transmitter and receiver coils arranged to minimize magnetic interference by ensuring the first target does not overlap with the receiving area of the second target's receiver coils, using a normal direction intersecting the movement direction and side-by-side arrangement of receiving areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple targets reciprocate within a limited operating range, then the device can detect positions of multiple targets, but the target's influence interferes with the receiver coil output for detecting other targets
Solution Approach 1:
The substrate is divided into multiple receiving areas, with each area dedicated to detecting a specific target. The first receiving area detects the first target and the second receiving area detects the second target, preventing interference between targets by spatially separating the detection zones.
Solution Approach 2:
The patent introduces a spatial dimension by arranging receiving areas at different positions on the substrate. By positioning the first and second receiving areas separately on the substrate, the system can detect multiple targets in different spatial zones without mutual interference, expanding the detection capability beyond a single detection zone.
2Measurement precision
If the substrate faces both targets with receiver coils arranged to minimize magnetic interference, then detection accuracy improves, but the device structure becomes more complex
Solution Approach 1:
Different regions of the substrate are assigned different functions: the first receiving area is optimized for detecting the first target while the second receiving area is optimized for detecting the second target. This local specialization allows each region to perform its detection function with high precision while minimizing interference from other targets.
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 effectively reduces the influence of one target on the detection signals of the other target's receiver coils, enhancing the accuracy and reliability of position detection.
Implementation Method 1
a first transmitter coil and a second transmitter coil, a first receiver coil and a second receiver coil that generate induced currents through electromagnetic induction caused by an energization of the first transmitter coil
Data Source
AI summary
A position detection device includes a first target that reciprocates in a predetermined movement direction, a second target that reciprocates together with the first target in the movement direction, and a substrate. The substrate is disposed on one side of the substrate in a normal direction with respect to the first and second targets, and has a first receiver coil and a second receiver coil that output a detection signal according to a position of the first target by electromagnetic induction. The substrate has a third receiver coil and a fourth receiver coil that output a detection signal according to a position of the second target by electromagnetic induction. A first receiving area occupied by the first and second receiver coils in the substrate, and a second receiving area occupied by the third and fourth receiver coils in the substrate are arranged side by side in the movement direction.