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IWR1642: Question about TIDEP-0090 (Traffic Monitoring TI design)

Part Number: IWR1642
Other Parts Discussed in Thread: TIDEP-0090


Would you pls help me on below questions about TIDEP-0090?

1. How does the radar mount in below test show in lab0013_traffic_monitoring_16xx/docs/traffic_monitoring_16xx_user_guide.html?

In tidud31.pdf, it says for Second Sensor Mount, the radar is 4.9m high and stop bar is 20m far way. But in above pic, you can see the stop bar distance to radar is less than 20m. Would you pls provide more detail on the radar mount info in above test case?

2. In traffic_monitoring_16xx_user_guide.html, you will see some car can be detected and tracked about 70ms away, but some can only be detected about 40m away. Why?

  • Hello Chris,

    1. You are correct that there are two slightly different setups. In the test scene pictured the EVM is mounted at 4.27m high and the stopbar is 18m from the EVM.

    2. Chris, the detection is based on the quality of the point cloud. Several things can affect the point cloud, how far the car is from the radar/the location (the antenna pattern is not a perfect symmetrical lobe), the geometry of the car, the speed it is going (more doppler info), whether it is obstructed or not. We can see that in the far lane the detection generally begins at a closer distance while in the closer lane the detection begins closer to 70m. In the test scene above, the antenna gain was reduced by 6db. It could be that better point clouds and detection could be achieved if increase the gain back to max.