基于电容传感的高灵敏大质量称重传感装置研究

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中图分类号：TB9;TM933 文献标志码：A文章编号：1674-5124（2025）11-0009-08

Abstract： The resolution of traditional resistive strain-gauge weighing sensors is generally limited to 1×10-4 full scale （FS），which is insufficient for applications such as high-precision masscomparators.To address this limitation， this paper proposes a large-massweighing method based on micro-displacement detection using a capacitive sensor.An "S"-shaped elastic body is designed to achieve a linear conversion from mass （gravity） to displacement.Simulations are performed to investigate the mechanical properties of the elastic body，clarifying how its geometric parameters influence these properties to guide the optimal design of the sensor. Experimental results demonstrate that the developed large-mass weighing sensor achieves a resolution better than 5×10-5 FS under a maximum load capacity of no less than 2000kg ： This confirms that the proposed method， by leveraging the inherent ultra-high sensitivity of capacitive sensors，can overcome the resolution botleneck of traditional resistive strain-gauge sensors，thereby offering anew approach for advancing high-sensitivity，largemass weighing and force-sensing technologies.

Keywords： large-mass weighing; mass comparators; capacitive sensor; elastomer; high resolution

0引言

高灵敏度称重或力传感技术被广泛应用于动态称重系统[1]、大型设备柔顺装配、质量比较仪制造[2-3]等领域，尤其后两者均要求称重传感器应兼具高分辨力和高负载能力。（剩余10216字）