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Title: Optical based tactile shear and normal load sensor

Various technologies described herein pertain to a tactile sensor that senses normal load and/or shear load. The tactile sensor includes a first layer and an optically transparent layer bonded together. At least a portion of the first layer is made of optically reflective material. The optically transparent layer is made of resilient material (e.g., clear silicone rubber). The tactile sensor includes light emitter/light detector pair(s), which respectively detect either normal load or shear load. Light emitter(s) emit light that traverses through the optically transparent layer and reflects off optically reflective material of the first layer, and light detector(s) detect and measure intensity of reflected light. When a normal load is applied, the optically transparent layer compresses, causing a change in reflected light intensity. When shear load is applied, a boundary between optically reflective material and optically absorptive material is laterally displaced, causing a change in reflected light intensity.
Inventors:
Issue Date:
OSTI Identifier:
1183925
Assignee:
Sandia Corporation (Albuquerque, NM) SSO
Patent Number(s):
9,052,775
Application Number:
13/556,393
Contract Number:
AC04-94AL85000
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Other works cited in this record:

Characterization of a novel hybrid silicon three-axial force sensor
journal, September 2005
  • Valdastri, P.; Roccella, S.; Beccai, L.
  • Sensors and Actuators A: Physical, Vol. 123-124, p. 249-257
  • DOI: 10.1016/j.sna.2005.01.006

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