Using Multiple Ultrasonic Sensors

I'd like to build a robot with three sensors for left, front, and right distances. I'd like to ensure that the output signal of one sensor doesn't get picked up by the others' receivers. Any ideas here? A physical "horn" to ensure selective hearing (heh)?

Thanks!

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michaelkellett over 6 years ago +2

The easiest way to do it is to fire the sensors sequentially. You probably need to allow a time between sensors firing of at least 10 x transit time of the normal maximum detection distance. So if you…
dougw over 6 years ago +2

As Michael indicates, this is normally handled with sequential activation. This slows response time so sometimes it is not ideal. Best speed is achieved by using the return from one sensor to trigger the…
grondak over 6 years ago in reply to dougw +2

Many of the ultrasonic sensors that are easy to buy have a single circuit board with a transceiver pair. I searched online for a simple way to change the frequency on such boards but didn't find one right…

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grondak over 6 years ago

Here is an article from MaxBotix on running multiple sensors. Summary: the ring method is their preferred/most reliable way to handle multiple sensors. I have 3 Maxbotix HRLV-EZ4 devices, so I can chain them like the diagram!
michaelkellett and dougw thank you for the fine discussion.
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clem57 over 6 years ago in reply to grondak

Good work. Waiting to see how this turns out.
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clem57 over 6 years ago in reply to grondak

Good work. Waiting to see how this turns out.
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