Doppler Radar Reading High Speeds

[Vipin Malik]

#364

My Doppler (Speed) radar is reading really high speeds. If the vehicle is travelling at (say) 20 mph, the radar will read a speed of almost 40 mph. What could be wrong?

• This topic was modified 3 years, 6 months ago by Vipin Malik.

[Vipin Malik]

#365

It’s possible that the radar is measuring the speed of the top of the wheel of the vehicle.

The axle of the wheel travels at the speed of the vehicle. However the top of the wheel travels at twice the speed. So if the wheel is large and exposed (for example in a tractor or 18 wheeler or Mule), there may be enough of a reflection off the top (treads or bolts near the top) that the radar will be able to track those speeds.

All our Doppler radars track multiple targets internally but send out the speed of only one target. The target selected for speed output is based on the user selection of “Select Strongest” or “Select Fastest”. If you are getting fast speeds, please check to see if the current selection is “Select Fastest”. If so, try changing it to “Select Strongest”. The reflection from the wheel will always be weaker than the reflection from the body. Thus selecting to output the speed of the “Strongest” target will usually fix this issue.

• This reply was modified 3 years, 6 months ago by Vipin Malik.

[OP_Traffic]

#2508

Where can I find this user selection option?

[Vipin Malik]

#2557

Please connect to the radar via our Stats Analyzer Windows program that you can download from this website. Once you connect to the radar this option is found on the “Radar Setup” tab.

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