Spherical Voice Coil Resolver for Multi-Axis Position Sensing
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Solution Overview
Problem
Existing multi-axis control systems require multiple position sensing devices, leading to complex mechanical and electrical designs, increased weight, and reduced reliability, necessitating a single device capable of providing high-precision, multi-axis position sensing.
Innovation Solution
A spherical resolver system with a spherical body and outer body, featuring three perpendicular axes of symmetry, where sensor coils are wound on the spherical body and a primary coil on the outer body, allowing for simultaneous induction of sensor signals representative of polar and azimuthal angles, enabling a single device to provide multi-axis position sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple position sensing devices are used for multi-axis rotational control, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple position sensing functions into a single spherical resolver device. The spherical resolver includes a spherical body with multiple sensor coils wound around it, where each coil senses position along a different axis. This merging of multiple sensing functions into one device directly resolves the contradiction by maintaining measurement precision while reducing device complexity.
Solution Approach 2:
The spherical resolver is designed as a universal sensing device that can simultaneously provide position sensing for multiple rotational axes. The device includes multiple primary coils and sensor coils arranged to detect position along different axes concurrently, making it a multi-functional device that replaces what would traditionally require multiple separate sensors.
2Measurement precision
If multiple position sensing devices are used for multi-axis rotational control, then measurement precision is improved, but weight increases
Solution Approach 1:
By merging multiple position sensing functions into a single spherical resolver device, the total weight of the sensing system is reduced. Instead of having multiple separate sensing devices each with their own housing, mounting structures, and electrical connections, one integrated spherical resolver performs all sensing functions, directly addressing the weight increase problem.
3Measurement precision
If multiple position sensing devices are used for multi-axis rotational control, then measurement precision is improved, but reliability decreases
Solution Approach 1:
The patent merges multiple position sensing functions into a single spherical resolver device. By reducing the number of separate sensing devices from multiple to one, the reliability is improved because there are fewer potential failure points. The single device has fewer mechanical interfaces, electrical connections, and mounting structures that could fail, while still providing accurate multi-axis position sensing.
4Measurement precision
If multiple position sensing devices are used for multi-axis rotational control, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The spherical resolver combines multiple position sensing functions into a single device, reducing the total number of parts that need to be manufactured, assembled, and tested. This merging approach reduces manufacturing cost by eliminating redundant components and simplifying the supply chain, while still achieving the required measurement precision for multi-axis control.
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 spherical resolver system simplifies mechanical and electrical designs, reduces weight and cost, while enhancing system reliability by providing accurate multi-axis position sensing with a single device.
Implementation Method 1
The circuit is coupled to the first primary coil and is operable to supply a first alternating current (AC) reference signal (Vr1) to the first primary coil, whereby a first sensor signal (Vx) is selectively induced in the first sensor coil
Data Source
AI summary
A spherical resolver system includes a spherical body, an outer body, a first sensor coil, a second sensor coil, a third sensor coil, a first primary coil, and a circuit. The spherical body has a first axis of symmetry, a second axis of symmetry, and a third axis of symmetry, and the first, second, and third axes of symmetry are disposed perpendicular to each other. The circuit is coupled to the first primary coil and is operable to supply a first alternating current (AC) reference signal (Vr1) to the first primary coil, whereby a first sensor signal (Vx) is selectively induced in the first sensor coil, second sensor signal (Vy) is selectively induced in the second sensor coil, and a third sensor signal (Vz) is selectively induced in the third sensor coil, and supplies one or more signals representative of the sensor position.