I need to count cars

[Anya_pankow]

Hi everybody! So I have a art project going on, I’ve built a machine that sculpts granite when car passes by. I don’t have many knowledge in robotics as I tought an alarm system sensor could do the job of signaling to the controller that a car has passed. It’s the computer that will do the counting part, I just need a sensor (a radar maybe?) that can send the information of a car passing.

I’ve read other thread about that manner that lead me to some products that may work but my lack of knowledge seems to not understand if the sensor will communicate the information directly as the car passes or if there will be a delay.

A wifi or bluetooth option would be great but not mandatory

Those are the products I’m considering :

Benewake TF-Luna 8m LiDAR Distance Sensor

OmniPreSense OPS243-C FMCW & Doppler Radar Sensor w/ WiFi/Bluetooth

Thank you!

I could post later on more images of the project if there is an interest

What I’m hoping for after 4 months of the machine sculpting the bloc :

[geraldinebc15]

Hello @Anya_pankow and welcome to the forum,

Interesting project!

Radar is an excellent choice, just make sure the detection range and beam width will work for your application.

if the sensor will communicate the information directly as the car passes or if there will be a delay.
The sensor speed depends on the sample frequency

As you want to use the wireless capabilities you will have to take into account the data transfer rate. Unfortunately, there is no mention of which Wifi/Bluetooth chip the board uses but just for reference: “Bluetooth 4.0 can transfer data up to 25 Mbps, whereas the latest version of WiFi can transfer data at up to 250 Mbps”, and as the data that needs to be sent isn’t big that should be enough for real-time communication.

I could post later on more images of the project if there is an interest

Yes! That would be great

Regards

[Anya_pankow]

Thanks a lot for those informations !

Best regards,