A Piezo-Avalanche Accelerometer
Bibliographic record
Abstract
We are reporting on the first use of the piezo-avalanche effect in a micromachined sensor for the measurement of inertial forces. The device integrates a pn junction at the base of a beam that is used as the spring for the microstructure. Movements of a proof-mass at the opposite end of the beam produce stress at the location of the junction. To measure this stress, the junction is forced into its reverse breakdown region while monitoring its current-voltage relationship. The mechanical stress modifies the bandgap of the material, eventually leading to a change in its breakdown voltage. It is shown that this simple structure provides a high sensitivity of ~3 nA/g when the device is biased with a fixed voltage in its breakdown region. The device operation is modeled analytically, and results are found to be in good agreement with the experiments. The piezo-avalanche effect scales favorably and can be utilized for stress measurements at arbitrary locations on a structure as well as at nanoscales.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".