A Study on the Development of Level Sensor using Frequency Modulated Continuous Wave

Park, Dong-Kook; Han, Tae-Kyoung; Park, In-Yong; Yoon, Chun-Su

Journal of Navigation and Port Research 2004;28(6):497-501.
Published online August 31, 2004.

주파수 변조 연속파를 이용한 레벨 측정 시스템 개발에 관한 연구

박동국, 한태경, 박인용, 윤천수

A Study on the Development of Level Sensor using Frequency Modulated Continuous Wave

Dong-Kook Park, Tae-Kyoung Han, In-Yong Park, Chun-Su Yoon

Abstract

In this paper, it is presented a level sensor for measuring a level of the contents of cargo tank using frequency modulated continuous wave(FMCW). The frequency range is 10~11 ㎓. the radar cross section(RCS) of test target is 0.8㎡ of metal plate. The experiment is performed in laboratory and ope ground, the sweep time of the signal is 100 ㎳, the pyramidal horn antenna of about 22 ㏈i gain is used, and input power of antenna is about 8 ㏈m. The beat frequency according to the target moving to 40 m is measured. There is a good agreement between measured and calculated results. But the resolution of the FMCW radar is measured about 10 ㎝ due to nonlinear of voltage controlled oscillator(VCO).

Key Words: radar;FMCW;level sensor;distance measurement