Looking for sensor to count cars for traffic control system

[7rots51]

sensor for counting cars

Hello

Do you know a sensor for counting the cars and (and if possible measure size of it) for a trafic contr0l system?

Please give link and comments about this.


Regards

 

[flatulent]

Re: sensor for counting cars

I have seen a scheme where a laser range finder is over each lane and pointing down. You get two range readings depending upon the presence of a vehicle or not. From the average traffic speed and the time of the short range reading you can estimate the vehicle length.

 

[alphi]

Re: sensor for counting cars

It is use light sensor to test car type.

 

[prokopec]

Re: sensor for counting cars

Look at http://www.ben.com/LEGO/rcx/train-sensor.html, there are foto and description light sensor for LEGO train.

 

[koky]

Re: sensor for counting cars

the best way is a inductive sensor with loop under the lan, or radar, i use this methode in my work

 

[7rots51]

Re: sensor for counting cars

koky: can you send a sch for it that have minimum temp drift?

I need more info on inductive and laser range finder,which is more accurate and practical?