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Original question:

IWRL6432: A question about radar maximum range distance

IWRL6432AOPEVM: Question about maximal down facing detection range

Peter Lindner
Prodigy 30 points
Part Number: IWRL6432AOPEVM
Other Parts Discussed in Thread: IWRL6432AOP

Tool/software:

hi there,

we made some tests here with the iwrl6432aop evm. we mounted it on a post at ca. 8m directly downfacing to the ground.

we used the motion and presence detection example and modified the configuration to do our best to reach maximum detection range.

but unfortunately we do not get any detection (not even points in the pointcloud) at this mounting height (also not at boresight).

in about 4m to 5m mounting height we get detections.

how could we estimate the detection range of this evm when its mounted downfacing? could someone help us understanding why we get such bad results with this orientation?

thank you for your help

greets peter

  • 0
    TI__Mastermind 35940 points

    Hi Peter,

    Can you show a picture of your setup and the configuration file you're using?

    Best,

    Nate

  • 0 in reply to Nathan Block
    Prodigy 30 points

    hi nathan, thnk you for your quick answer,

    unfortunately i have no picture of my setup at the moment. we're just downfacing directly to ground with a mounting height of ca. 8m on a lighting post.

    this is my actual configuration:

    sensorStop 0
channelCfg 7 3 0
chirpComnCfg 15 0 0 128 1 26 0
chirpTimingCfg 6 26 0 25 60
channelCfg 7 3 0
frameCfg 2 0 180 16 50 0
factoryCalibCfg 1 0 30 0 0x1ff000
antGeometryCfg 1 1 1 0 0 1 1 3 1 2 0 3 2.5 2.5
guiMonitor 2 0 0 0 0 1 1 0 0 0 0
sigProcChainCfg 64 8 1 0 4 4 0 .5
cfarCfg 2 4 3 2 0 10 0 0.5 0 1 1 1
aoaFovCfg -60 60 -40 40
rangeSelCfg 1.0 20.0
clutterRemoval 1
compRangeBiasAndRxChanPhase 0.0 1.00000 0.00000 1.00000 0.00000 1.00000 0.00000 1.00000 0.00000 1.00000 0.00000 1.00000 0.00000
adcDataSource 0 adc_data_0001_CtestAdc6Ant.bin
adcLogging 0
lowPowerCfg 0
mpdBoundaryBox 1 -6.7 -2.23 2.23 6.7 0 8
mpdBoundaryBox 2 -2.23 2.23 2.23 6.7 0 8
mpdBoundaryBox 3 2.23 6.7 2.23 6.7 0 8
mpdBoundaryBox 4 -6.7 -2.23 -2.23 2.23 0 8
mpdBoundaryBox 5 -2.23 2.23 -2.23 2.23 0 8
mpdBoundaryBox 6 2.23 6.7 -2.23 2.23 0 8
mpdBoundaryBox 7 -6.7 -2.23 -6.7 -2.23 0 8
mpdBoundaryBox 8 -2.23 2.23 -6.7 -2.23 0 8
mpdBoundaryBox 9 2.23 6.7 -6.7 -2.23 0 8
sensorPosition 0 0 8 0 90
majorStateCfg 5 4 40 2 1 40 8 2
clusterCfg 1 0.5 2
baudRate 1250000
sensorStart 0 0 0 0

    thank you very much for your help!

    br peter

  • 0 in reply to Peter Lindner
    TI__Mastermind 35940 points

    Hi,

    When I put your configuration file in the sensing estimator, I see that it has pretty coarse velocity resolution. Can you increase the burst perioditicity and see if performance improves?

    You can also enable minor mode motion detection to see if that helps too.

    Finally, consider improving your link budget by using chirp accumulation (say 2-4 chirps).

    You can also consult the overhead lighting configuration file for ideas (found at C:\ti\radar_toolbox_3_10_00_05\source\ti\examples\Industrial_and_Personal_Electronics\Motion_and_Presence_Detection\Overhead_Lighting\chirp_configs). This was designed more for 3m than 8m height, but the same concepts should apply.

    Best

    Nate