Cited by 2.2k
Kunming University of Science and Technology
Publishes on Lung Cancer Treatments and Mutations, Lung Cancer Research Studies, Lung Cancer Diagnosis and Treatment. 121 papers and 4.1k citations.
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Abstract Among kinds of flexible tactile sensors, piezoelectric tactile sensor has the advantage of fast response for dynamic force detection. However, it suffers from low sensitivity at high-frequency dynamic stimuli. Here, inspired by finger structure—rigid skeleton embedded in muscle, we report a piezoelectric tactile sensor using a rigid-soft hybrid force-transmission-layer in combination with a soft bottom substrate, which not only greatly enhances the force transmission, but also triggers a significantly magnified effect in d 31 working mode of the piezoelectric sensory layer, instead of conventional d 33 mode. Experiments show that this sensor exhibits a super-high sensitivity of 346.5 pC N −1 (@ 30 Hz), wide bandwidth of 5–600 Hz and a linear force detection range of 0.009–4.3 N, which is ~17 times the theoretical sensitivity of d 33 mode. Furthermore, the sensor is able to detect multiple force directions with high reliability, and shows great potential in robotic dynamic tactile sensing.