What effect does the camera use to detect the speed?

The camera detects the speed of the car through radar and microwave.

The principle is to hit the car with microwaves of various frequencies, and measure the speed of the car according to its reflection time. This kind of radar speed measurement is often used in highways, national highways and the surrounding areas of cities.

High-speed camera speed measurement method

1, the appearance of speed measurement is like a rectangular box, and it is actually the radar module connected to it that plays a decisive role. Velocity radar uses the principle of Doppler effect. When the vehicle approaches the radar antenna, the frequency of the reflected signal will be higher than that of the transmitter, and when the vehicle leaves the antenna, the frequency of the reflected signal will be lower than the transmission probability, so that the relative speed between the target and the radar can be calculated by changing the frequency.

2. Public security bayonet camera. No matter what the speed is, this camera will flash to take pictures. Its main function is to monitor the vehicles and personnel at the entrance and exit, check the clues of suspicious vehicles, and help the staff of criminal police and other departments to trace the people involved.

3. The surveillance cameras have various shapes such as spherical, cylindrical and square boxes. Some of these cameras are equipped with LED lighting devices, which are kept on at night to ensure a clear view of the cameras. Remote monitoring camera is a kind of remote monitoring camera, which is mainly divided into three types: normal version, enhanced version and outdoor version. It can rotate 320 degrees left and right and 60 degrees up and down to monitor, take photos and video.