Hey everyone, so I have a crazy idea, but not sure how effective it would work. I'm trying to detect the speed of another vehicle (let's say directly in sight) in front of my vehicle. The sensing range would have to be from 0ft to 30ft.
I've messed around with ultrasonic sensors and IR ones too. Ultrasonic ones can't go that far, at most 5ft from my experience, and IR sensors can go further, but work really bad when it's super bright and sunny out. So instead of using sound or light, would microwaves work?
I've thought about using the BH100 microwave sensor, but I'm somewhat worried it wouldn't work?
The ultrasonic and ir sensors have a great direct line of sight and obviously like and sound transfer faster than 55mph, haha. But do microwave sensors have a direct line of sight much like those sensors? And, because my vehicle is in motion and theirs would be too, would it have trouble detecting theirs at all?
Cars use expensive radar sensors or complex vision systems.
There are cheap LIDAR sensors but they only work reliably if you can keep the optics perfectly clean, which is impossible for a forward facing sensor on a car.
I got the HB100X module this week. I want to create a Speed Trap as toy for my kids.
The HB100 alone can't be connected directly to your Arduino, you need an amplifier. but the HB100X (round one) has an amplifier and you can just measure the time between 2 pulses to detect the speed - frequence should be between 3 and 80Hz, if I understand it correctly.
But I still have no measurements, so I don't know if it works. Some people (using a separate amplifier module) say you can measure only up to 40km/h. So, probably it will not work.
@mikb55: You can find a low cost LIDAR for about 150-200$ (if you want reach at least 16m). The HB100 is 5$ or 10$ with the amplifier.
It would be nice to be able to find a low cost solution for the Arduino, or not? I can find only the HB100x. But didn't found any dopler or lidar for 10-50$.
Next week I will assemble my speed trap with speed detection, flash, ov-cam and web server to see the final picture on my smartphone... I can than post my experience and test it with my car.
