Car Parking Sensor

[pilar]

Hello, someone has experience in the use of the parking sensors with Pics?

http://www.dx.com/p/car-parking-sensor-radar-kit-dc-12v-113045#.Vqo6fZrhCt8

I want to know which is the protocol used, I need to use these sensors in another application instead of the SRF04 or SRF08 by these sensors are already sealed ....

Thanks for your comments

[temtronic]

You'd have to buy a couple, then attach either an oscilloscope or data analyzer to see the data going from the 'transducer box' to the 'display box'. That is a fairly simple task once you have the equipment set up,simply move object xx distance, record observations and repeat. If you have a 'protocol analyzer' it _might_ decode the datastream however I think it'll be propriatory.
You need two units as you will have to break open one to see what's inside and attach probes to.

Once apart you might be able to Google for information providing the part numbers of the chips haven't been removed or are OEM numbers.

This could easily take 1-6 weeks depending on skill level,equipment and well.. luck.

Jay

[Ttelmah]

The actual sensors are just standard ultrasonic transducers. Unlike most designs they use the same transducer for both send and receive. This is less sensitive than using separate sensors (for these the receive sensor normally has a design slightly more optimised for receive), but they use relatively high power so this isn't a problem. Does mean the circuit has to have really good isolation between the transmit section and the receive (they use a FET switch to isolate the receive for a few moments after the transmission has finished). The control box contains the transmit and receive circuitry, and generates from the decoded distance, the audio tone and/or visual signal sent to the front of the car.
You could just use the transducers, but then you'd have the work of designing/building the control circuitry. Otherwise you'll have to decode the format used for the display data....