It would be too inaccurate to fingerprint a specific vehicle based on the waveform generated as it drives over a coil sensor like this. For example, if your car drives over it one day and then drives over the same coil but 20cm to the left, the waveforms would be different enough already that they couldn’t be statistically correlated. A large truck driving over an edge could look like a small car driving directly through the middle. These kinds of sensors are really only useful for saying a big chunk of ferromagnetic something passed by.






They’re pretty huge though. Fine if shelf space isn’t a premium, but 12 drives will be rough on your PSU.