Magneto-Mechanical Resonator With Segmented Biasing
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Solution Overview
Problem
Conventional magneto-mechanical resonators (MMRs) have limited detection range and frequency stability, particularly due to the length of the metal ribbon used and the influence of the earth's magnetic field.
Innovation Solution
A magneto-mechanical resonator device with a ferromagnetic resonator element formed from an amorphous metal ribbon, where the length is an integer multiple of a half wavelength of the resonant frequency, and featuring differential alternating biasing along its lateral sides, enhancing frequency stability and detection range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the length of the metal ribbon is increased to improve detection range, then the detection range is improved, but the frequency stability deteriorates due to earth's magnetic field influence
Solution Approach 1:
The resonator element is divided into multiple segments along its length, with each segment having alternating bias directions. This segmentation allows the resonator to maintain frequency stability while achieving extended detection range through constructive interference of segments.
Solution Approach 2:
Different segments of the resonator element are given different local qualities through alternating bias directions. This local differentiation enables each segment to contribute positively to the overall signal while maintaining frequency stability despite the extended total length.
2Use of energy by moving object
If the resonator element length is increased to improve energy storage, then energy storage is improved, but frequency stability deteriorates
Solution Approach 1:
The resonator element is segmented into multiple sections with alternating bias directions. This segmentation allows the resonator to accumulate energy across multiple segments while maintaining frequency stability through the alternating bias configuration that compensates for environmental magnetic field variations.
Solution Approach 2:
The bias direction parameter is changed alternately across different segments of the resonator element. This parameter change enables the resonator to maintain consistent resonant frequency while increasing total energy storage capacity through the extended length of multiple segments.
3Device complexity
If a single bias direction is used to simplify the structure, then device complexity is reduced, but frequency stability deteriorates under ambient magnetic fields
Solution Approach 1:
The bias configuration is segmented into alternating directions along the resonator element. While this increases structural complexity compared to a single bias direction, it dramatically improves frequency stability under ambient magnetic fields by creating a differential effect that cancels out environmental interference.
Solution Approach 2:
The bias configuration uses asymmetric alternating directions rather than a symmetric single direction. This asymmetry in bias arrangement enables the resonator to maintain frequency stability by creating opposing magnetic field effects that compensate for ambient field variations.
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 differential biasing configuration increases frequency stability and detection range, allowing for longer resonator lengths with improved energy storage and coherence, while maintaining resonant frequency consistency under ambient magnetic fields.
Implementation Method 1
a ferromagnetic resonator element having a length substantially equal to an integer multiple (N) of a 1/2 wavelength of a resonant frequency of the ferromagnetic resonator element, the ferromagnetic resonator element formed from an amorphous metal ribbon
Implementation Method 2
at least one bias magnetic element disposed along a lateral side of the ferromagnetic resonator element, wherein a 1/2 wavelength length of the resonator element is a 1/2 wavelength segment and wherein each adjacent 1/2 wavelength segment is biased in an opposite direction
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
A magneto mechanical resonator device comprises a ferromagnetic resonator element having a length substantially equal to an integer multiple (N) of a ½ wavelength of a resonant frequency of the ferromagnetic resonator element, wherein the ferromagnetic resonator element is formed from an amorphous metal material, wherein N is at least 2, and at least one bias magnetic element disposed along a lateral side of the ferromagnetic resonator element.