Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Vehicle Sensor - how to design it?

Status
Not open for further replies.

ASIC

Full Member level 3
Joined
May 18, 2001
Messages
164
Helped
2
Reputation
4
Reaction score
1
Trophy points
1,298
Activity points
1,205
Vehicle Sensor

Hi,

I need to design a car sensor to be places in the ground under the road for detecting the precense of cars. The system must be static, i.e. I can power down the sensors, and when powered up again, I can check if there is a car there or not. Any design ideas?


ASIC
 

ted

Full Member level 3
Joined
Mar 12, 2002
Messages
182
Helped
28
Reputation
56
Reaction score
24
Trophy points
1,298
Activity points
2,875
I am not an expert in this stuff at all, but what I would do is to see variations of the conventional magnetics principles. One interesting article is http://www.itsa.org/subject.nsf/Files/3116/$file/3116.pdf


Good luck,
Ted
 

mr_ghz

Full Member level 5
Joined
Apr 1, 2002
Messages
289
Helped
7
Reputation
14
Reaction score
5
Trophy points
1,298
Activity points
3,551
Hi asic

I see two possibilities:
1) A car is made with a lot of metal. If you use a big inductor built under
the car and use this inductor to build an oscillator you can see a drastic
frequency-change if a car is placed above the inductor
2) You use a radar or ultrasonic distance-sensor. If no car is present, you
will see (perhaps) an object in a distance over 2 meters (your roof). If
a car is present, this distance goes down to about 0.4meters

Greets
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top