Application of Hadamard transform to fiber optic smart-skin sensing

Francis T. Yu, Shizhuo Yin, Paul B. Ruffin

Research output: Chapter in Book/Report/Conference proceedingConference contribution


An array of optical fibers can be applied to smart skin sensing applications, which include stress monitoring, fatigue detection, temperature sensing, etc. Although a single light source can be used in a fiber array sensor, the input light power is divided by a sensing fiber array and each fiber may require a detector. Thus as the channel number of a fiber array increases, the number of detectors also increases and the signal intensity of each fiber channel decreases, which decreases the signal-to-noise ratio and increases the complexity and the cost of the system. In this paper, we analyze the Hadamard transform to enhance the signal processing of the fiber array sensor. The apparent advantages are: only one detector is needed and the signal-to-noise ratio of the fiber array sensor can be improved by a factor of √N/2, where N is the number of sensing fibers. Analysis for an array of 127 sensing fibers is illustrated, in which we have shown that the calculated results are in agreement with the analytical model.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsRichard O. Claus
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Number of pages8
ISBN (Print)0819411515
StatePublished - 1993

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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