At present, the widely used speed measurement technologies in my country include radar speed measurement, ground sensor coil speed measurement, video speed measurement, infrared detection and laser speed measurement. Among them, laser speed measurement, as an efficient vehicle speed detection method, has become increasingly important in road traffic law enforcement in recent years. Let's take a deeper look at the principles and characteristics of laser speed measurement.

Laser speed measurement is based on the vehicle speed detection technology developed abroad in the 1990s. It uses the principle of laser ranging, that is, electromagnetic waves propagate at a speed of 300,000 kilometers per second. By emitting a laser beam to the object to be measured, receiving the reflected beam, and recording the time difference, the distance between the object to be measured and the test point can be accurately calculated. Laser speed measurement determines the moving distance of the object to be measured during the period through two distance measurements with a specific time interval, and then derives its moving speed.

Laser speed measurement has many significant characteristics:

First, it has the ability to accurately aim. The laser beam emitted by the laser speed meter is very thin, with a divergence angle of only 3mrad, so the irradiation diameter at 100 meters is only 30 centimeters, which can accurately lock any target.

Secondly, the measurement range of laser speed measurement is relatively long. Compared with radar speed measurement, laser speed measurement has a longer effective distance, which can be measured up to 1,000 meters away, making it easy to capture at a long distance without being easily noticed.

In addition, laser speed measurement is sensitive, with a single speed measurement time of about 0.33-0.66 seconds, which can quickly obtain vehicle speed information.

It should be noted that laser speed meters are usually used in a stationary state. Due to the limitations of its working principle, laser speed meters cannot be used in motion, so traffic police usually place them on patrol cars and perform speed measurement operations after parking.

In addition, laser speed meters have anti-interference capabilities. Because the laser beam is extremely thin and reacts quickly, general electronic detectors on the market cannot effectively interfere with or detect the work of laser speed meters.

Laser speed measurement is increasingly widely used in traffic law enforcement. At present, many domestic law enforcement units have adopted handheld laser speed meters, such as Onick LS320, LSP320, etc. These devices not only have speed measurement functions, but also can measure distance, and are powerful. They can easily identify and detect the speed of a single vehicle or even a motorcycle from a busy multi-lane highway. With the popularization of new equipment, radar detectors alone can no longer meet the protection needs. It is foreseeable that the application of laser speed measurement in traffic law enforcement will become more and more common in the future.