Multi-Layer Sense Coil Crossover Layout for Precise Angular Sensing
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Solution Overview
Problem
Existing inductive angular-position sensors face challenges in achieving accurate and reliable angular position measurement, particularly in environments requiring light-weight, low cost, and noise-immune solutions.
Innovation Solution
The development of a coil structure for inductive angular-position sensing that includes a crossover connection for the sense coils, allowing for improved magnetic field interaction and enhanced signal modulation, thereby enabling more accurate angular position measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional coil structures are used in inductive angular-position sensors, then the device complexity is reduced and ease of manufacture is improved, but the measurement precision and reliability of angular position measurement deteriorate
Solution Approach 1:
The coil structure is divided into multiple discrete turns with individual crossover connections. Each turn is separately configured to create specific magnetic field patterns, allowing precise control over the magnetic field distribution around the target object, thereby improving angular position measurement accuracy.
Solution Approach 2:
Crossover connections are strategically placed at specific locations within the coil structure to create localized magnetic field enhancements. These crossover points generate concentrated magnetic field regions that improve the sensor's ability to detect angular position changes at critical measurement zones.
2Reliability
If crossover connections are added to the coil structure, then the signal modulation and magnetic field interaction are enhanced, but the ease of manufacture and device complexity are worsened
Solution Approach 1:
The crossover connections are pre-configured into the coil structure during manufacturing, with connection points and routing paths predetermined. This preliminary arrangement ensures reliable magnetic field interaction and signal modulation while simplifying the manufacturing process by eliminating the need for complex post-assembly adjustments.
Solution Approach 2:
The crossover connections act as intermediary elements that facilitate magnetic field coupling between different parts of the coil structure. These connections serve as mediators to enhance magnetic field interaction and signal modulation without requiring direct complex interactions between coil turns.
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
The proposed coil structure enhances the accuracy and reliability of angular position measurement by effectively modulating sense signals in response to the target's rotation, even in harsh environments.
Implementation Method 1
If a coil of wire is placed in a changing magnetic field, a voltage will be induced at ends of coil of wire. In a predictably changing magnetic field, the induced voltage will be predictable (based on factors including the area of the coil affected by the magnetic field and the degree of change of the magnetic field).
Data Source
AI summary
An apparatus includes a support structure and a sense coil comprising conductive traces on, or in, multiple layers of the support structure. The sense coil includes a first coil portion, a second coil portion, and first and second crossover connections. The first coil portion has M turns defining one or more in-phase lobes and the second coil portion has N turns defining one or more out-of-phase lobes. The first crossover connection connects an ending portion of an Mth turn of the first coil portion of an in-phase lobe to a starting portion of a first turn of the second coil portion of an out-of-phase lobe. The second crossover connection connects an ending portion of an Nth turn of the second coil portion of the out-of-phase lobe to a starting portion of a first turn of the first coil portion of the in-phase lobe.