Bio-mechanoreceptors capable of micro-motion sensing have inspired mechanics-guided designs of micro-motion sensors in various fields. However, it remains a major challenge for mechanics-guided designs to simultaneously achieve high sensitivity and broadband sensing due to the nature of resonance effect. By mimicking rat vibrissae, here we report a metamaterial mechanoreceptor (MMR) comprised of piezoelectric resonators with distributed zero effective masses featuring a broad range of local resonances, leading to near-infinite sensitivity for micro-motion sensing within a broad bandwidth. We developed a mechanical frequency-division multiplexing mechanism for MMR, in which the measured micro-motion signal is mechanically modulated in non-overlapping frequency bands and reconstructed by a computational multi-channel demodulation approach. The maximum sensitivity of MMR is improved by two orders of magnitude compared to conventional mechanics-guided mechanoreceptors, and its bandwidth with high sensitivity is extendable towards both low-frequency and high-frequency ranges in 0–12 kHz through tuning the local resonance of each individual sensing cell. The MMR is a promising candidate for highly sensitive and broadband micro-motion sensing that was previously inaccessible for mechanics-guided mechanoreceptors, opening pathways towards spatio-temporal sensing, remote-vibration monitoring and smart-driving assistance.

能够进行微运动传感的生物机械感受器激发了各个领域微运动传感器的力学引导设计。然而，由于共振效应的性质，同时实现高灵敏度和宽带传感仍然是力学引导设计的主要挑战。通过模仿大鼠触须，我们在这里报告了一种超材料机械感受器（MMR），它由具有分布式零有效质量的压电谐振器组成，具有广泛的局部谐振，从而在宽带宽内实现近乎无限的微运动传感灵敏度。我们开发了一种用于 MMR 的机械频分复用机制，其中测量的微动信号在非重叠频带中进行机械调制，并通过计算多通道解调方法进行重建。与传统机械引导机械感受器相比，MMR的最大灵敏度提高了两个数量级，并且通过调节每个机械感受器的局部谐振，其高灵敏度带宽可扩展到0-12 kHz的低频和高频范围。单个传感单元。MMR 是高灵敏度和宽带微运动传感的有前途的候选者，这是以前机械引导的机械感受器无法实现的，为时空传感、远程振动监测和智能驾驶辅助开辟了道路。