Multitouch Pressure Sensing With Soft Optical Time-of-Flight Sensors

被引：16

作者：

Lin, Ji-Tzuoh ^{[1
]}

Newquist, Christopher A. ^{[1
,2
]}

Harnett, Cindy K. ^{[1
]}

机构：

[1] Univ Louisville, Dept Elect & Comp Engn, Louisville, KY 40208 USA

[2] Edapt Comp Inc, Dayton, OH 45458 USA

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2022年 / 71卷

基金：

美国国家科学基金会;

关键词：

Optical fiber sensors; Optical fibers; Optical sensors; Sensors; Optical switches; Optical reflection; Optical fiber networks; Multiplexing; optical time-domain reflectometry; optical waveguides; pressure measurement; tactile sensors; TEMPERATURE; FABRICATION;

D O I：

10.1109/TIM.2022.3141159

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article reports on optical time-of-flight (ToF) as a detection mode for soft optical deformation sensors. In this work, low-cost miniature light detection and ranging (LiDAR) chips recently developed for consumer mobile device applications perform real-time optical reflectometry at cm scales in soft optical waveguide networks. Our methods complement existing work by capturing spatial information that is lost with amplitude-only measurements. We demonstrate its application in a multitouch button system capable of extracting displacement values from soft optical switches with average error in the range of 100-200 microns on 1.75 mm of the switch travel. Because making reliable electronic connections to soft materials is a challenging task, we focus on minimizing connector count. In a tracking application, we find the centroid of an object on a three-point supported plate using three optical pressure switches connected to a single LiDAR sensor.

引用

页数：8

共 58 条

[31] Advanced Soft Materials, Sensor Integrations, and Applications of Wearable Flexible Hybrid Electronics in Healthcare, Energy, and Environment [J].