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An Optoelectronics-Based Compressive Force Sensor with Scalable Sensitivity

Sensors, ISSN: 1424-8220, Vol: 23, Issue: 14
2023
  • 1
    Citations
  • 0
    Usage
  • 8
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    1
  • Captures
    8
  • Mentions
    1
    • News Mentions
      1
      • News
        1

Most Recent News

Research Findings from University of Oregon Update Understanding of Sensor Research (An Optoelectronics-Based Compressive Force Sensor with Scalable Sensitivity)

2023 AUG 07 (NewsRx) -- By a News Reporter-Staff News Editor at Electronics Daily -- Researchers detail new data in sensor research. According to news

Article Description

There is an increasing need to accurately measure compressive force for biomedical and industrial applications. However, this need has not been fully addressed, as many sensors are bulky, have high power requirements, and/or are susceptible to electromagnetic interference. This paper presents an optoelectronics-based force sensor that can overcome the limitations of many sensors in the market. The sensor uses a light emitting diode (LED) to transmit visible broad-spectrum light into a photoresistor through an optically clear spacer on top of an elastomeric medium. In the absence of an external force, the light path is mostly blocked by the opaque elastomeric medium. Under a compressive force, the clear spacer compresses the elastomer, moving itself into the light path, and thus increasing the overall light transmission. The amount of light received by the photoresistor is used to quantify compressive force based on elastomer displacement/compression and a priori knowledge of elastomer stiffness. This sensing scheme was tested under eight different configurations: two different sized sensors with four types of elastomers per size (20A neoprene, 30A neoprene, 50A neoprene, and 75A styrene–butadiene rubber (SBR)). All configurations measured force with R > 0.97, RMSE < 1.9 N, and sensitivity values ranging from 17 to 485 N/V. This sensing scheme provides a low-cost, low-power method for accurate force sensing with a wide force range.

Bibliographic Details

Pennel, Zachary; McGeehan, Michael; Ong, Keat Ghee

MDPI AG

Chemistry; Computer Science; Physics and Astronomy; Biochemistry, Genetics and Molecular Biology; Engineering

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