Research on Acoustic Signal Identification Mechanism and Denoising Methods of Combine Harvesting Loss
Abstract
:1. Introduction
2. Materials and Methods
2.1. Impact Simulation between Plate and Throws
2.2. Signal Acquisition and Analysis
2.2.1. Design of the Signal Acquisition Circuit
2.2.2. Acoustic Monitoring Test Bench
2.2.3. Acoustic Feature Analysis
2.3. Research on Loss Detection Methods
2.3.1. Signal Denoising Method
2.3.2. Recognition and Counting Method of Grain Signals
3. Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Material Properties | Grain | Stem | Plate | Air |
---|---|---|---|---|
Density/kg·m−3 | 760 | 160 | 7850 | 1.3 |
Young’s modulus/MPa | 464 | 410 | 2.1 × 105 | |
Poisson’s ratio | 0.40 | 0.35 | 0.30 | |
Pressure cutoff/Pa | −1 × 10−10 | |||
Viscosity coefficient/N·s·m−2 | 2 × 10−5 | |||
Initial internal energy/Pa | 2.5 × 105 |
*surface_to_surface | Static Coefficient of Friction | Dynamic Coefficient of Friction | |
Parameter value | 0.56 | 0.02 | |
*lagrange_in_solid | Number of Coupling Points | Fluid–Structure Coupling Method | Coupling Direction |
Parameter value | 3 | 4 | 2 |
*control_ale | Alternate Advection Logic | Number of Cycles | ALE Smoothing Weight Factor |
Parameter value | −1 | 1 | −1 |
Step | Intrinsic Modes of the Grain Model (Hz) | Intrinsic Modes of the Stem Model (Hz) |
---|---|---|
1 | 0 | 0 |
2 | 3.2584 × 10−4 | 0 |
3 | 7.6664 × 10−4 | 0 |
4 | 1.4152 × 10−3 | 5.2634 × 10−3 |
5 | 1.5645 × 10−3 | 5.7461 × 10−3 |
6 | 2.1082 × 10−3 | 6.6704 × 10−3 |
7 | 37,750 | 4784.1 |
8 | 37,837 | 12,009 |
9 | 44,106 | 13,063 |
10 | 46,978 | 21,041 |
11 | 46,985 | 21,082 |
12 | 51,154 | 24,800 |
Group | Experimental Time (Sec) | Detected Grain Loss | Actual Grain Loss | Detection Error (%) |
---|---|---|---|---|
1 | 45 | 1636 | 1695 | −3.4 |
2 | 43 | 1623 | 1772 | −8.4 |
3 | 42 | 1330 | 1233 | +7.9 |
4 | 46 | 1130 | 1079 | +4.8 |
5 | 47 | 1404 | 1464 | −4.1 |
6 | 42 | 1250 | 1156 | +8.1 |
Average | 44 | 1396 | 1400 | 6.1 |
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Shen, Y.; Gao, J.; Jin, Z. Research on Acoustic Signal Identification Mechanism and Denoising Methods of Combine Harvesting Loss. Agronomy 2024, 14, 1816. https://doi.org/10.3390/agronomy14081816
Shen Y, Gao J, Jin Z. Research on Acoustic Signal Identification Mechanism and Denoising Methods of Combine Harvesting Loss. Agronomy. 2024; 14(8):1816. https://doi.org/10.3390/agronomy14081816
Chicago/Turabian StyleShen, Yuhao, Jianmin Gao, and Zhipeng Jin. 2024. "Research on Acoustic Signal Identification Mechanism and Denoising Methods of Combine Harvesting Loss" Agronomy 14, no. 8: 1816. https://doi.org/10.3390/agronomy14081816