On Fri, 23 Jan 1998, Anders Eliasson wrote:

> Hi,
>
> I'm building a PIC-based ranging system.
> I need to measure the distance between moving vehicles and have some
> problems doing this.
>
> The distance can vary from 0 to say 150-200 meters (more or less)
> I've seen some SONAR-designs doing this, but not in these distances...
> My idea is to use one (probably several) 40 kHz transmitter(s)
>
> Oh yes, the field must be quite narrow (to not detect cars in other lanes).
> Perhaps LASER would be a better choice?
>
Probably not a good idea

> Does anyone have experiences in this field?
>
check http://www.celsiustech.se/products

choose sensors and then intelligent car radar

> Cheers
>
> /Anders
>

/Sten

---
Sten Dahlgren  CelsiusTech Systems   ! "I'd rather have 39 Hp under my arm
S-175 88 Jaerfaella      Sweden      ! than one under my backside"
seda@celsiustech.se +46-8 58084430   ! join your nearest karting club now !!