RESEARCH ARTICLE
A thermally flexible and multi-site tactile sensor for remote 3D dynamic sensing imaging
. School of Electrical Engineering, Qingdao University, Qingdao 266000, China.. Department of Pediatric Surgery, Affiliated Hospital of Qingdao University, Qingdao 266000, China.. College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China.. Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), Jinan University, Jinan 250022, China
Accepted: 2020-02-25
Available online: 2020-02-25
Abstract
A flexible, multi-site tactile and thermal sensor (MTTS) based on polyvinylidene fluoride (resolution 50 × 50) is reported. It can be used to implement spatial mapping caused by tactile and thermal events and record the two-dimensional motion trajectory of a tracked target object. The output voltage and current signal are recorded as a mapping by sensing the external pressure and thermal radiation stimulus, and the response distribution is dynamically observed on the three-dimensional interface. Through the mapping relationship between the established piezoelectric and pyroelectric signals, the piezoelectric component and the pyroelectric component are effectively extracted from the composite signals. The MTTS has a good sensitivity for tactile and thermal detection, and the electrodes have good synchronism. In addition, the signal interference is less than 9.5% and decreases as the pressure decreases after the distance between adjacent sites exceeds 200 µm. The integration of MTTS and signal processing units has potential applications in human-machine interaction systems, health status detection and smart assistive devices.
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