A Correvit sensor works in the same way as a bar code reader. As I suppose all of you have experienced in a grocery store or any other store where you can buy products with a barcode.
I’m not sure but this how I think it works.
The emitter (laser beam or any light emitting device) is sending a light to the to the surface and from the surface the light is reflected back to the receiving sensor.
As in a case of a bar code reader the light is reflecting back to the sensor from the black (bar code) surface or the white one. The signal coming back to the sensor is transferred to the signal processing unit that convert the signal to a digital information that can be used by any microprocessor to convert it to a numeric code. As seen if the bar code reader can’t read the bar code, the code is entered on the keyboard.
The Correvit equipment takes a “picture” of the surface at some moment and then taking an other picture few microseconds later. Comparing those two “pictures” of the surface, the signal-processing unit, and the central processing computer (CPU) can determinate where the car is going (straight, sideways, the speed, riding height etc.). Very heavy signal processing.
Complete Vehicle Testing Solutions
http://www.corrsys-datron.com/Suppor...aserTriang.pdf