The working principle of electronic police

Introduction 1. The electronic eye uses an induction line to sense the pressure transmitted by cars on the road surface. The signal is collected by the sensor to the central processor and sent to a register for temporary storage (this data is stored within a red light cycle); 2. Within the same time interval (red light cycle), if two pulse signals are generated at the same time, in simple terms, if the light is red at that time and your head wheel crosses the line, but the rear wheel does not exit the line, only one pulse is generated. Without two consecutive pulses, no photo is taken; 3. Some situations are: some people drive their front wheels over the line, afraid of being photographed, so they get off the car again and return to the line, but still get photographed. What is the reason? It is because of the generation of a "pair" of pulse signals one before and one after (this pair of pulses is generated within the same red light cycle) that I have been queued n times. However, at present, most electronic police induction coils have logic recognition function, and this situation can not be captured. 4. When the yellow light is on, the camera system starts after a delay of 2 seconds; When the red light is on, the system has already started; When the green light is about to turn on, turn off the system 2 seconds in advance, mainly to prevent misoperation. So many taxi drivers know that they are almost ready to leave, and that's the same thing. But I suggest everyone not to do so because the timing is difficult to grasp. After the image is downloaded and transmitted to the command center, it needs to be registered, numbered, announced, and then transmitted to the central computer database for various authorities to call. System characteristics: Vehicle capture rate -100%. Recognition time - approximately 1 second. License plate recognition rate - over 95% during the day and over 90% at night. Applicable speed -5-180Km/h.

1. There are two ways to capture illegal TV cameras: one is to bury an induction coil underground and install a digital camera on the crossbar for capturing traffic lights, and the other is to install a camera for real-time recording of speeding, illegal parking, etc. Regardless of the method, at least three images will be taken of the offending vehicle, one is a momentary violation image, one is a license plate recognition image, and one is a panoramic image. Regardless of the method, the camera is turned on 24 hours a day for shooting, and the image retention time is usually one week. 2. The command center for the violation handling process receives images and compares the license plate information with the vehicle management office information to retrieve comprehensive information about the vehicle, such as owner, model, color, etc. The information processing personnel then input it into the website of the Beijing Public Security Traffic Management Bureau to enable the violation owner to conduct inquiries. 3. The issue of information loss is not that all illegal vehicles can be captured. Only when the license plate image is clear can the information entry personnel input the illegal vehicles into the database for processing. 4. The shooting range of a camera is usually only one lane, and a few can capture two lanes, usually set on the first and second lanes counted from left to right. The shooting range of digital cameras is relatively wide, so most of them can capture all lanes in the same direction in urban areas. Job characteristics 1. Speed monitoring dzjz starts after the vehicle speed exceeds the specified 20km. 2. Red light monitoring dzjc starts 3 seconds after the red light comes on