DOI QR코드

DOI QR Code

Algorithm for Detecting Direction of Single IF Scheme CW Radar Sensor

단일 IF 방식 CW 레이더 센서의 방향 검출 알고리즘

  • Han, Byung-Hun (Department of Electrical, Electronics & Communication Engineering, Korea University of Technology and Education) ;
  • Shin, Hyun-Jun (Department of Electrical, Electronics & Communication Engineering, Korea University of Technology and Education) ;
  • Oh, Chang-Heon (Department of Electrical, Electronics & Communication Engineering, Korea University of Technology and Education)
  • Received : 2015.08.10
  • Accepted : 2015.09.24
  • Published : 2015.12.31

Abstract

CW Radar Sensors can be categorized into Single and Dual by its IF output type. Dual IF type is used for detecting the direction of moving objects. However, Dual IF type has more complicated circuitry than Single IF type and higher cost due to more parts required. In this paper, we propose an algorithm for Single IF type CW radar sensors to detect the direction of moving objects. It performs FFT on signals created at IF output when an object moves and determines approach, stop and recede according to amplitude variations. In order to verify the algorithm, a function generator is used to create a virtual signal and confirmed that it accurately detects the directions according to amplitude variations.

CW 레이더 센서는 IF 출력 방식에 따라 단일 IF 방식과 이중 IF 방식이 있다. 움직이는 물체의 방향을 검출하기 위해서는 이중 IF 방식을 사용한다. 하지만 이중 IF 방식은 단일 IF 방식에 비해 회로가 복잡하며 부품 추가로 인해 가격이 높아진다. 본 논문에서는 단일 IF 방식 CW 레이더 센서에서 움직이는 물체의 방향을 검출할 수 있는 알고리즘을 제안한다. 물체가 움직일 때 발생하는 IF 출력단의 신호를 FFT를 수행하고 진폭의 변화에 따라 접근/정지/이탈을 판단한다. 알고리즘의 검증을 위해 함수발생기를 사용하여 가상의 신호를 발생시키고 신호의 진폭 변화에 따라서 방향을 정확하게 판단하는 것을 확인하였다.

Keywords

References

  1. Y. M. Bea, "Technology Trends and Prospects of smart sensors," The Magazine of Kiice, vol. 13, no. 1, pp. 46-51, June. 2012.
  2. Gary W. Hunter, Joseph R. Stetter, Peter J. Hesketh and Chung-Chiun Liu, "Smart Sensor Systems," The Electrochemical Society Interface, vol. 19, no. 4, pp. 29-34, Winter. 2012.
  3. Merrill I. Skolnik, Introduction to Radar Systems, McGraw-Hill, 2001.
  4. Y. C. Kim, "A study on the Real-Time Velocity Measurement System for Doppler Radar," Ph. D. dissertation, Wonkwang University, Iksan, Jeonbuk, 2004.
  5. G. D. Kim, "Safety Improvement of an Automatic Door System Using Ultrasonic Sensors," M. S. thesis, University of Seoul, Seoul, 2012.
  6. J. W. Jin, "Temperature Compernsation Method and Driving Circuit Implementation of Infrared Temperature Sensor," M. S. thesis, Kyung Hee University, Seoul, 2014.
  7. radartutorial.eu [Internet]. Available: http://www.radartutorial. eu/index.en.html.
  8. The Differences Between Pulse Radars and FMCW Ones [Internet]. Available: http://www.slideshare.net/Nguynng11 /fmcw-vs-pulse-radar.
  9. B. H. Han, and C. H. Oh, "Development of CW Doppler Sensor Signal Processing Board for Motion Detection," Proceedings of Conference on Information and Communication Engineering, vol. 19, no. 1, pp. 866-869, 2015.
  10. B. H. Han, H. J. Shin and C. H. Oh, "The Algorithm for Detecting Directions of CW Doppler Radar Single Output Mode," Proceeding of The Korea Navigation Institute Conference, vol. 19, no. 1, pp. 116-117, 2015.

Cited by

  1. 레이더 센서를 이용한 거리 측정 시스템의 설계 및 구현 vol.22, pp.7, 2018, https://doi.org/10.6109/jkiice.2018.22.7.1009
  2. 비접촉식 스마트센서 기반 수위측정 방법 구현 vol.23, pp.6, 2015, https://doi.org/10.6109/jkiice.2019.23.6.733