Dynamic Response Analysis of a Strain Gauge Load Cell under Impact Loading for Accuracy Improvement in an Automatic Bottle Sorting System
Keywords:
Load Cell, Dynamic Response, Settling Time, Automatic Sorting System, Impact MeasurementAbstract
This study aims to investigate the dynamic response behavior of a strain gauge load cell under impact conditions and to apply the findings to improve the accuracy of an automatic sorting system. The experimental setup employed a load cell integrated with an HX711 signal amplification module and an Arduino Uno microcontroller for real-time data acquisition. Experiments were conducted by dropping objects with masses of 30, 50, 120, and 250 grams under controlled position and height conditions. The results showed that the output signal exhibited damped oscillation behavior during the transient period, and the settling time (Ts) increased significantly with the mass of the object. The average settling times for 30, 50, 120, and 250 grams were 50.22, 65.14, 100.02, and 145.03 milliseconds, respectively. To prevent signal overlapping in continuous measurements, the minimum release time was defined as approximately 2Ts, which improved system stability and reduced measurement errors. Furthermore, a linear relationship between object mass and release time was observed, leading to the development of an empirical calibration equation Trelease = 0.832M+86.46 with a coefficient of determination R2 = 0.982, indicating a high level of model accuracy. The findings demonstrate that the dynamic response characteristics of the load cell can be effectively utilized to determine optimal timing in automatic sorting systems, thereby reducing noise effects and signal overlap while enhancing overall system accuracy and stability.
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