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Author Topic: Doppler Speed Radar  (Read 7282 times)
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Maybe some day I'll be able to listen to objects move again. It's a wonderful experience.
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I find it harder to express logic in English than in Code.
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umm, Is there any way of putting the velocity at 0 mph when not detecting anything? Cause here(when I experimented with it) when I did not move my hand, it still showed 2 mph & that's not acceptable in some cases.
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I don't think you connected the grounds, Dave.
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Quote
when I experimented with it
What is the "it" of which you speak?
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Russ,

If I can ask what did you pay for the MDU1720 modules and where did you get them?

Thanks
wade
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I'm staying in India & I got is in handy:
http://www.sunrom.com/sensors/speed/microwave-doppler-radar-sensor-for-motion-and-speed-sensing

Obviously I'm talking about the speed that get's printed in serial monitor.
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Try testing with something that has no moving parts, like a cardboard box. With doppler a car with running engine 'moves' just by the vibration of the body.

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I find it harder to express logic in English than in Code.
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It's with the timer 2, that's for sure. But before I make the initial values as 0mph, I need an expert opinion on this & a better way of doing this.
& showing 2mph for a static body's sort of absurd. But that's mathematics going in there.
I confused myself on this. Just started studying Timers
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Is there a way of increasing the range of the Doppler radar? As in the data sheet of the Doppler radar(that I bought from an Indian market) shows a maximum sensing range of 20ms . But when I tested it on road, it gave me hardy1.5-1.8ms sensitivity. The parallex X-band sensor have a range 2.4-9m approx. I need to increase the range of my Doppler since I cannot get a parallex model whose sensitivity range can be controlled with a trim pot.

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Can you give it more power?

Also what you reflect from, smooth metal is best and for testing a corner reflector will send the most back. If you take a box and cut so there are 3 sides together making a corner then line the inside of that with smooth foil (try not to wrinkle) you will have a cheap corner reflector. Make it not small. Even if the reflector is not pointing directly at the source, the geometry will send the waves back. It works with light, it should work with radar.

Last is movement. The object must move relative to the radar either toward or away though sideways can be mixed in.
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I find it harder to express logic in English than in Code.
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No 5 volts is maximum. & currently, since I'm using it for vehicle speed measurement, you can expect the worse conditions. Any type of vehicle's surface from Indian Roads shall be the reflecting surface.
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