灵活的应力传感器阵列,包括多个柔性应力传感器单元,使空间应力分布的精确量化和分析。然而,当前柔性应力传感器阵列的实现面临着信号线过多的挑战,导致变形能力降低,稳定性,可靠性,和增加的成本。主要障碍在于传感器单元信号的电振幅调制性质(例如,电阻和电容),每根电线只允许一个信号。为了克服这一挑战,已经开发了单线多通道信号(SLMC)测量,能够通过一条或两条信号线同时检测多个传感器信号,这有效地减少了信号线的数量,从而提高稳定性,可变形性,和可靠性。这篇评论提供了SLMC测量的一般知识,从柔性应力传感器及其压阻开始,电容,压电,和摩擦电传感机制。进一步讨论了不同的阵列方法及其相应的优缺点。最后,这篇综述将现有的SLMC测量方法分类为RLC串联谐振传感,传输线传感,离子导体传感,摩擦电传感,压阻式传感,以及基于其机制的分布式光纤传感,介绍了各种方法的机理和特点,总结了SLMC测量的研究现状。
Flexible stress sensor arrays, comprising multiple flexible stress sensor units, enable accurate quantification and analysis of spatial stress distribution. Nevertheless, the current implementation of flexible stress sensor arrays faces the challenge of excessive signal wires, resulting in reduced deformability, stability, reliability, and increased costs. The primary obstacle lies in the electric amplitude modulation nature of the sensor unit\'s signal (e.g., resistance and capacitance), allowing only one signal per wire. To overcome this challenge, the single-line multi-channel signal (SLMC) measurement has been developed, enabling simultaneous detection of multiple sensor signals through one or two signal wires, which effectively reduces the number of signal wires, thereby enhancing stability, deformability, and reliability. This review offers a general knowledge of SLMC measurement beginning with flexible stress sensors and their piezoresistive, capacitive, piezoelectric, and triboelectric sensing mechanisms. A further discussion is given on different arraying methods and their corresponding advantages and disadvantages. Finally, this review categorizes existing SLMC measurement methods into RLC series resonant sensing, transmission line sensing, ionic conductor sensing, triboelectric sensing, piezoresistive sensing, and distributed fiber optic sensing based on their mechanisms, describes the mechanisms and characteristics of each method and summarizes the research status of SLMC measurement.