Wireless Power Transfer for Telemetric Devices With Variable Orientation, for Small Rodent Behavior Monitoring
Why this work is in the frame
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Bibliographic record
Abstract
Gathering behavioral and biological data from small rodents is important for the study of various disease models in biomedical research. Such data acquisition requires a long-term powering method for telemetry electronics and radios, for which a wireless power transfer (WPT) scheme is desirable. This paper investigates a novel WPT system to deliver power from a stationary source (primary coil) to a moving telemetric device (secondary coil) via magnetic resonance coupling. To conduct research with rodents effectively, they must be able to move freely inside their cage. However, the continuously changing orientation of the rodent leads to coupling loss/problems between the primary and secondary coils, presenting a major challenge. We propose novel configurations of the secondary employing ferrite rods placed at specific locations and orientations within the coil. Three-dimensional finite-element analysis using COMSOL software is used to find the magnetic flux density distribution surrounding these secondary configurations. The simulation results show a significant increase of flux through the coil using our ferrite arrangement, with improved coupling at most orientations. Physical prototypes of these secondary coil configurations were constructed and experiments were conducted to test their performance. Measurements show that ferrite rods improved power transfer at most orientations, beyond that of the nominal ferrite-less configuration. The use of angled ferrite rods further improved power transfer, where the medium-ferrite-angled (4MFA) configuration is best. Experiments show the maximum power collected by 4MFA was 113 mW, when parallel to the primary coil, and 28 mW when 60° to the primary coil.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it