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Title: Integrated proximity, contact and force sensing using elastomer-embedded commodity proximity sensors

Journal Article · · Autonomous Robots

Here, we describe a combined proximity, contact and force (PCF) sensor based on a commodity infrared distance sensor embedded in a transparent elastomer with applications in robotic manipulation. Prior to contact, the sensor works as a distance sensor, whereas after contact the elastomer magnifies the near field of the proximity sensors letting the sensor interpret the indentation on elastomer as force. Contact occurs at the transition of proximity and force. We describe in detail the sensor design, its principle of operation and experimentally characterize the design parameters including polymer thickness, its mixing ratio, and emitter current of the infrared sensor. We also show that the sensor response has an inflection point at contact that is independent of an object’s surface properties, making it a robust detector for contact events. We finally demonstrate a series of use cases for the proposed PCF sensor, including (1) improving pre-grasp alignment, (2) determining contact event with objects, (3) obtaining simple 3D point cloud models of objects using both proximity and contact, and (4) registering self-generated point clouds to those from a RGB-D camera using a Baxter robot and Kinova Jaco arm.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1478224
Report Number(s):
SAND-2017-1719J; 654186
Journal Information:
Autonomous Robots, Vol. 42, Issue 7; ISSN 0929-5593
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (3)

Soft robot perception using embedded soft sensors and recurrent neural networks journal January 2019
An Embedded, Multi-Modal Sensor System for Scalable Robotic and Prosthetic Hand Fingers journal December 2019
An Embedded, Multi-Modal Sensor System for Scalable Robotic and Prosthetic Hand Fingers text January 2020