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Flexible optical tactile sensor based on a liquid-membrane lens structure

Ronghua Hu, Hui Yang, Lihui Wang, and Longfei Fan

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Abstract

Based on the liquid lens focus mechanism, a novel, to the best of our knowledge, optical tactile sensor is designed by taking advantage of the structure simplicity, fast response, and environmental immunity. The design of the tactile sensing mechanism used the liquid-membrane lens structure. To integrate the tactile sensing system, we designed a data acquisition circuit unit. A performance test platform was built, and performance testing and two application demonstrations were conducted. The experiment’s result showed that the linear fitting degree was greater than 0.988, the load response time was 0.078 s, the target mass was accurately measured, the maximum error was less than 0.02 N, and the fine adjustment of the LED light intensity was achieved.

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Supplementary Material (1)

NameDescription
Visualization 1       When the sensor voltage changed within the interval corresponding to the LED drive voltage, and it controlled the LED brightness. LED brightness control experiments showed that the sensor could achieve signal modulation using different magnitudes of

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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