We are currently doing a project on ultrasonic collision avoidance systems. Please suggest an efficient ultrasonic transducers.

 

That's an interesting project. Ultrasonic has a couple drawbacks that I've run into in level applications:

1) when the ambient temperature drops below dewpoint and the result is fog. Fog seems to eat up ultrasonic pings. Low amplitude or non-existent echo is the result.

2) The time necessary for ringing in the transducer to diminish to the point where the transducer can be used as the 'microphone' to listen for the echo. Limits the sampling frequency.

The size of the transducers necessary for longer shots is substantially larger.

I would suspect that 'accuracy' of the distance calculation is not the primary consideration, so tradeoffs could be made for faster sampling, perhaps greater power.

It would be very interesting to see how well any ultrasonic sensor would detect an approaching collision with a telephone pole - a rounded object with only a thin line of 'points' tangental to the centerline axis of the ping.

David

 

Hello,

We are still in the process of making ultrasonic collision avoidance system. The only hurdle which we may face is whether the trasducer will emit ultrasonic wave on being driven by 40 khz signal.

any one has any suggestions please...

Sulgith Moosan