Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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A Distance Estimation Algorithm Based on Multi-Code Ultrasonic Sensor and Received Signal Strength

다중 코드 초음파와 전파 신호 강도를 이용한 거리 측정

  • Received : 2010.09.15
  • Accepted : 2011.01.03
  • Published : 2011.02.01
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Abstract

This paper reveals a distance estimation algorithm based on multi-code ultrasonic and wireless sensor network. For measuring the distances among the sensor nodes, each ultrasonic transmitter transmits multi-code ultrasonic signal simultaneously. Receivers use cross correlation method to separate the coded signals. The information of measured distances is broadcasted to each sensor node by wireless sensor network. The wireless sensor network measures the distance among the sensor nodes using the received signal strength of the broadcasting. The multi-code ultrasonic have a limitation of measurable distance. And the received signal strength is affected from an environment. This paper measures a distance using ultrasonic and a received signal strength in short range. These measured data are applied to the least square estimation algorithm. By the expansion of the fitting curve, a distance measurement in long range using the received signal strength is compensated. The coupled system reduce the error to an acceptable level.

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References

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Cited by

  1. Optimization of Code Combination in Multi-Code Ultrasonic Sensors for Multi-Robot Systems vol.19, pp.7, 2013, https://doi.org/10.5302/J.ICROS.2013.13.1902