How does a one-way electronic eye trigger a photo?

The electronic eye triggers the photographing function by rolling the road surface induction coil with the wheel. At present, the red light electronic eyes are all geomagnetic induction coils, and diamond grooves are dug at the intersection of the red light electronic eyes before and after the warning line, and the induction coils are buried inside.

The principle of electronic eye shooting red light is as follows:

1. When the front wheel of your car runs over the induction coil on the ground, take your first photo electronically.

When the rear wheel of your car runs over the induction coil on the ground, take a second photo of you electronically.

3. When your car ran over the induction coil on the opposite ground through the intersection, the electron took your third photo.

Extended data:

Electronic eye system features:

1, vehicle capture rate-100% (excluding motorcycles, etc. ).

2, recognition time-about 1 second (definitely much faster than your reaction).

3, the license plate recognition rate-more than 95% during the day, more than 90% at night (relatively high).

4. The applicable speed is -5- 180 km/h (if you drive 190 in the urban area, you can escape, but the consequences of speeding are also very serious ...).

5. When the green light is about to light up, turn off the system 2s in advance, mainly to prevent shooting errors.

6. The principle of shooting a yellow light should be the same as that of shooting a red light. The new traffic regulations say that when the yellow light is on, once any part of the car body crosses the stop line, the vehicle can continue to pass, and it may not be recognized as a yellow light. But at the moment when the yellow light is on at the intersection, it is sometimes difficult to judge whether the car body has crossed the warning line. ?

References:

Baidu encyclopedia-electronic eye