Measuring Speed

General project help for Adafruit customers

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
johnover
 
Posts: 18
Joined: Mon Nov 14, 2011 6:23 pm

Measuring Speed

Post by johnover »

I live on a street where, for some reason, people continually blow the stop sign. I saw a kid almost die three weeks ago because of it... I'd like to get my city to do something, but I need data to show them how often this is happening. Because it's a public area, I can't use lasers to sense speed, so my options are ultrasonic or radar (microwave). Is there a sensor I can use with Arduino that will detect the speed of a moving car which is, say, 25-40 feet away?

Thanks - help me save a life!

User avatar
adafruit_support_bill
 
Posts: 88093
Joined: Sat Feb 07, 2009 10:11 am

Re: Measuring Speed

Post by adafruit_support_bill »

We have the Maxbotix ultrasonic distance sensors. But they are not really a great choice for an accurate measurement of speed. You can get a rough estimate by taking two distance readings a fixed time apart. But the timing resolution is not going to be very precise.

Locked
Please be positive and constructive with your questions and comments.

Return to “General Project help”