[ Huaqiang Security Network News ] 
Two questions for everyone to introduce one, which camera captures the red light; Second, the camera captures the principle of red light.
Which kind of camera captures the red light
Each location is set differently. Some places have special shooting turns. Some places do not, but the leftmost straight wide angle can be photographed, and some only go straight. It depends on what the installation site looks like!
The surrounding auxiliary light is always on, and it is not obvious that some are not visible. Therefore, it is not easy to say, generally do not grasp the revisit of the place, write down the record box number, check the management company, ask them to produce the record. With the seal, they will directly remove the following aviation heads for them, and ask them to open the box and report it and say that the crash will be fine!
The principle of the camera capturing the red light
1. The electronic eye uses the sensing line to sense the pressure from the car on the road, and collects the signal through the sensor.
X processor, send register temporary storage (this data is valid in a red light cycle);
2. In the same time interval (within the red light cycle), if two pulse signals are generated at the same time, it is regarded as “effectiveâ€. Simply put, if the red light is at the time, your front wheel is over the line, and then the wheel If the line has not been pressed, only one pulse is generated, and when there are no consecutive two pulses, no photograph is taken;
3. Some situations are: Some people drive the front wheel over the line, afraid of being photographed, so he dumped the car and returned to the line. The result was still taken. What is the reason? It is because one after the other, a "one pair" pulse signal (this pair of pulses is generated in the same red light cycle), I just because it was arranged n times,
4. When the yellow light is on, the camera system starts after 2s delay; when the red light is on, the system has started; when the green light is going to be on, the system is turned off 2s in advance, mainly to prevent accidental shooting. So many taxi drivers know that they can almost go, just like nothing. However, it is recommended that you do not do this because the timing is more difficult to grasp.
Post processing:
After the image is downloaded and transmitted to the command center, the image needs to be registered, numbered, and announced, and then transmitted to the central computer database for various organs to call.
System Features
Vehicle capture rate----100% (excluding two-wheeled motorcycles, etc.).
Recognition time ---- about 1 second (definitely faster than your reaction)
License plate recognition rate-----more than 95% during the day and more than 90% at night (higher).
Applicable speed ------ 5-180km / h (If you open 190 in the city, you can escape despite the escape)
1. The principle of illegal TV capture
There are two ways, one is to embed the induction coil underground, the digital camera is set on the crossbar for capturing the red light, and the other is to set up the camera for real-time video recording of overspeed, red light, illegal parking, etc. Either way, at least three pictures will be taken for illegal vehicles, one is an instant violation picture, one is a number plate identification picture, and one is a panoramic picture. Either way, it is a 24-hour boot, and the picture retention time is usually one week.
2. Violation process
When the command center receives the picture, it will compare the license plate number information with the information of the vehicle management office, and then call out the comprehensive information of the vehicle, such as the owner, model, color, etc., and then the information processing personnel website, so that the illegal owner can make inquiries.
3. Information loss problem
Not all illegal vehicles can be photographed. Only when the license plate picture is clear, the information input personnel can enter the illegal vehicle into the database for processing.
4, shooting range:
A camera usually takes only one lane, and a few can take two lanes, usually located on the first and second lanes from left to right. Digital cameras have a wide range of shots, so most of the urban areas are able to capture all lanes in the same direction.
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