研究目的
Investigating a novel approach for the determination of True-Speed-Over-Ground for trains using radar sensors.
研究成果
The lab measurements showed promising results for the use in train scenarios. The reliability information provided by the correlation peak can be used to further improve the precision of the measured velocity by evaluating the measurement values over time or by sensor fusion.
研究不足
The precision of the measured velocity is limited by the pulse repetition frequency and the angle of the antenna beam. Nearby image pixels get more similar with increasing pulse repetition frequency, which can result in wrongly determined pixel distances.
1：Experimental Design and Method Selection:
The study employs a bi-static 24 GHz FMCW radar for speed determination by correlating the received signals of two side-looking radar sensors.
2：Sample Selection and Data Sources:
Test measurements are conducted in two different scenarios to validate the concept.
3：List of Experimental Equipment and Materials:
A bi-static 24 GHz FMCW radar is used, with specific parameters set for the FMCW signal.
4：Experimental Procedures and Operational Workflow:
The radar is mounted on a 3 m long linear stage to imitate a moving train, with measurements taken at different stage velocities.
5：Data Analysis Methods:
The cross-correlation function of the images generated by the two radar sensors is calculated to determine the velocity.
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