Tactile sensing of subcutaneous organ vibrations provides a promising route toward human-machine interfaces and wear-able diagnostics,particularly for voice rehabilitation and silent-speech communication.Here,we prese...Tactile sensing of subcutaneous organ vibrations provides a promising route toward human-machine interfaces and wear-able diagnostics,particularly for voice rehabilitation and silent-speech communication.Here,we present a bioinspired piezoelectric vibration sensor that mimics the graded stiffness and stress-based transduction mechanism of otolithic cilia in the human vestibular system.The device consists of a trapezoidal cantilever array with tip inertial masses,fabricated through a hybrid stereolithography 3D printing and laser micromachining process for rapid prototyping without cleanroom facilities.Finite-element modeling and experimental measurements demonstrate a fundamental resonance near 1.2 kHz,a 5%flat-bandwidth of 350 Hz,and an in-band charge sensitivity of 3.17 pC/g.A wearable proof-of-concept test further verifies the sensor's ability to reproducibly distinguish phoneme-specific vibration patterns in both time and frequency domains.This work establishes a foundation for bioinspired tactile sensing front-ends in wearable voice interfaces and other intelligent diagnostic systems integrated with machine-learning algorithms.展开更多
Pacinian corpuscle is a tactile receptor that responds to high-frequency(20-1000 Hz)vibration and has high-pass filtering and mechanical signal amplification functions.It is the main receptor of vibration tactility cl...Pacinian corpuscle is a tactile receptor that responds to high-frequency(20-1000 Hz)vibration and has high-pass filtering and mechanical signal amplification functions.It is the main receptor of vibration tactility closely related to fine touch sensation,which is the ability to perceive and localize objects’shape,texture,and size.Currently,it is still difficult to measure and calculate the friction generated by robots grasping objects.The resolution of touch and vibration sensors cannot satisfy the demand for understanding tribological behavior.The simulation of Pacinian corpuscles’structure and replication of its key functions will bring richer touch information to robots.In this review article,the structure and functions of Pacinian corpuscles are summarized from the internal structure of a single Pacinian corpuscle and the spatial distribution of multiple Pacinian corpuscles.Then,theoretical models and research on the bionics design of Pacinian corpuscles are introduced based on the three reception processes of Pacinian corpuscles:mechanical transmission,electromechanical transduction,and neural excitation.Finally,the bottlenecks of current research on the simulation of Pacinian corpuscles are summarized,followed by the proposal of research ideas on the simulation of Pacinian corpuscles.展开更多
文摘Tactile sensing of subcutaneous organ vibrations provides a promising route toward human-machine interfaces and wear-able diagnostics,particularly for voice rehabilitation and silent-speech communication.Here,we present a bioinspired piezoelectric vibration sensor that mimics the graded stiffness and stress-based transduction mechanism of otolithic cilia in the human vestibular system.The device consists of a trapezoidal cantilever array with tip inertial masses,fabricated through a hybrid stereolithography 3D printing and laser micromachining process for rapid prototyping without cleanroom facilities.Finite-element modeling and experimental measurements demonstrate a fundamental resonance near 1.2 kHz,a 5%flat-bandwidth of 350 Hz,and an in-band charge sensitivity of 3.17 pC/g.A wearable proof-of-concept test further verifies the sensor's ability to reproducibly distinguish phoneme-specific vibration patterns in both time and frequency domains.This work establishes a foundation for bioinspired tactile sensing front-ends in wearable voice interfaces and other intelligent diagnostic systems integrated with machine-learning algorithms.
基金support from the National Natural Science Foundation of China (No.51805218)Natural Science Foundation of Jiangsu Province (No.BK20170552)China Postdoctoral Science Foundation Funded Project (No.2018M632239).
文摘Pacinian corpuscle is a tactile receptor that responds to high-frequency(20-1000 Hz)vibration and has high-pass filtering and mechanical signal amplification functions.It is the main receptor of vibration tactility closely related to fine touch sensation,which is the ability to perceive and localize objects’shape,texture,and size.Currently,it is still difficult to measure and calculate the friction generated by robots grasping objects.The resolution of touch and vibration sensors cannot satisfy the demand for understanding tribological behavior.The simulation of Pacinian corpuscles’structure and replication of its key functions will bring richer touch information to robots.In this review article,the structure and functions of Pacinian corpuscles are summarized from the internal structure of a single Pacinian corpuscle and the spatial distribution of multiple Pacinian corpuscles.Then,theoretical models and research on the bionics design of Pacinian corpuscles are introduced based on the three reception processes of Pacinian corpuscles:mechanical transmission,electromechanical transduction,and neural excitation.Finally,the bottlenecks of current research on the simulation of Pacinian corpuscles are summarized,followed by the proposal of research ideas on the simulation of Pacinian corpuscles.
