Our lab is thinking about how to connect flexible and stretchable electronic circuits together. Whether it’s a soft silicone stick-on “electronic tattoo” or a fabric based e-textile, no one wants to plug in a huge lumpy connector at the edge of the device. However, these circuits usually need connectors for power and communication. We are …
Author Archives: cindy.harnett@louisville.edu
OptiGap: a customizable bend location sensor
Where is that thing bending? PhD student Paul Bupe has developed a prototyping system for determining where robots and other flexible structures are changing curvature. The OptiGap concept uses soft plastic 3d printing filaments as waveguides with gaps that let light out when bent. Not only is the system low cost and customizable on the …
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Adaptive Grasping Control
Ph.D. student Michael Han has further improved the optoelectronic control method with an adaptive control algorithm, enabling robotic grippers to hold on to objects without crushing them even under changing conditions. This video also shows a little more detail about the soft optical sensor’s construction. Paper:
Sensor stops slipping
Ph.D. student Michael Han has developed a new optoelectronic tactile sensor that enables robots to better emulate the grasping abilities of the human hand. The sensor, described in “Soft, All-Polymer Optoelectronic Tactile Sensor for Stick-Slip Detection,” combines a skin-like soft silicone material with a bristle friction model to provide not only normal force information, but …
Sensing pressure at the speed of light
In our latest paper, an optical pulse travels through a branched waveguide network. A ranging sensor made for consumer electronics is put to work measuring the arrival time distribution of the pulse after it splits and travels through branches with three different lengths. Rubber “switches” squeeze down on each branch when pressure is applied. This …