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Sensor Signal Processing for Ultrasonic Sensors Using Delta–Sigma Modulated Single-Bit Digital Signal

  • S. Hirata
  • M.K. Kurosawa
  • T. Katagiri
Conference paper
Part of the Acoustical Imaging book series (ACIM, volume 29)

Abstract

Ultrasonic distance measurement is based on determining the time of flight of ultrasonic wave. The pulse compression technique that obtains the cross-correlation function between the received signal and the reference signal is used to improve the resolution of distance measurement. The cross-correlation method requires high-cost digital signal processing. This paper presents a cross-correlation method using a delta–sigma modulated single-bit digital signal. Sensor signal processing composed of the cross-correlation between two single-bit signals and a post-moving average filter is proposed and enables reducing the cost of digital signal processing.

Key words

Ultrasonic distance measurement Pulse compression technique Delta–sigma modulation Cross-correlation Moving average filter 

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References

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • S. Hirata
    • 1
    • 2
  • M.K. Kurosawa
    • 1
    • 2
  • T. Katagiri
    • 1
    • 2
  1. 1.Department of Information ProcessingTokyo Institute of TechnologyYokohamaJapan
  2. 2.Sutekina IncKomaganeJapan

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