Portable Microwave Sensor Based on Frequency-Selective Surface for Grain Moisture Content Monitoring
Why this work is in the frame
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Bibliographic record
Abstract
A novel portable, lightweight, and compact microwave sensor for monitoring the grain moisture content (MC) is proposed in this letter. The proposed sensor is a frequency-selective surface (FSS) antenna consisting of 21 square-shaped complementary split-ring resonators (SCSRRs). The proposed sensor was printed directly on a lightweight and flexible container made of PF-4 with the size of 60 mm × 28 mm × 50 mm. Each SCSRR consists of two cocentered square-shaped rings with 0.3-mm spacing. The length, width, and thickness of the conductive section are 52 mm, 20 mm, and 0.017 mm, respectively. The operating frequency band was chosen as 1−6 GHz due to the insensitivity of the water's dielectric constant to the temperature variation. Monitoring variations in <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">S</i> -parameters, notably the resonance frequency, indicate the MC variations. The proposed sensor detects a 160-MHz shift in the resonance frequency for barley MC ranging from 10 to 25%. The high sensitivity, compactness, flexibility, low weight, portability, small cross-interference sensitivity, simplicity of operation, environment-friendly fabrication, and low cost of the proposed sensor make it attractive for monitoring grain MC.
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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 | 0.000 | 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