Research on a Soil Mechanical Resistance Detection Device Based on Flexible Thin-Film Pressure Sensors
Zhang H. Zhang W. Qi B. Wang Y. Ding Y. Deng Y. Amantayev M.
September 2025Multidisciplinary Digital Publishing Institute (MDPI)
Agronomy
2025#15Issue 9
Soil compaction is a pivotal factor influencing crop growth and yield, and its accurate assessment is imperative for precision agricultural management. Soil mechanical resistance is the key indicator of soil compaction, with accurate measurement enabling precise assessment. Dynamic soil mechanical resistance measurement outperforms conventional manual fixed-point sampling in data acquisition efficiency. In this paper, a methodology is proposed for the dynamic acquisition of soil mechanical resistance using a flexible thin-film pressure sensor. This study dynamically captures soil mechanical resistance at three depths (5 cm, 10 cm, and 15 cm) under dynamic machinery operating conditions. A device was designed for the detection of soil mechanical resistance, and a prediction model for soil mechanical resistance was developed based on the Kalman filter algorithm. Tests were conducted under steady-state and variable-load conditions, and the predicted values accurately tracked the reference pressure. Soil tank trials showed that at an operating speed of 0.69–0.72 km/h, the average prediction errors for the three soil layers were 2.03%, 1.48%, and 6.27%, with the coefficient of determination (R2) between predicted and measured values reaching 0.96. The system effectively predicts multi-depth soil resistance, providing novel theoretical and technical approaches for dynamic acquisition.
detection device , flexible thin-film pressure sensor , Kalman filter algorithm , precision agriculture , soil mechanical resistance
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Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture and Rural Affairs, Nanjing, 210014, China
Department of Agrarian Machinery and Transportation, Akhmet Baitursynuly Kostanay Regional University, Kostanay, 110000, Kazakhstan
Nanjing Institute of Agricultural Mechanization
Department of Agrarian Machinery and Transportation
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