What is the main function of electronic eyes without fill lights?
2 Answers
Electronic eyes without fill lights work by recording videos. Introduction to electronic eyes: Currently, the most commonly used devices for capturing traffic violations in cities are electronic cameras. Electronic cameras can monitor vehicles in real-time within the surveillance area. When a vehicle commits violations such as running a red light, driving in the wrong direction, or crossing the line, the electronic camera will continuously capture multiple images of the process. How electronic eyes work: Electronic eyes use induction loops to sense the pressure from vehicles on the road. The sensors collect signals and send them to the central processor, which temporarily stores the data in a register (this data is valid within one red light cycle). If two pulse signals are generated simultaneously within the same time interval, it is considered "valid." Simply put, if the front wheels cross the line during a red light but the rear wheels do not, only one pulse is generated. No photo is taken unless there are two consecutive pulses.
Actually, these non-flashing electronic eyes are mainly used during the day. I pass by several of them every day on my way to work and found they primarily do three things: catching those who cross solid lines to change lanes, specifically photographing those who cut in line at intersections, and monitoring no-U-turn zones. Last time, I saw three cars at an intersection being continuously photographed for crossing solid lines, and the electronic eye didn't even flash once. However, after dark, they basically stop working since without supplementary lighting, they can't clearly capture license plates. So, nighttime DUI checks still rely on mobile devices with flashes. It's better to drive carefully when passing by such cameras during the day—don't think you won't be caught just because there's no flash.
