With the rapid development of China’s economic construction and the continuous improvement of the citizens’ daily level, the number of forest vehicles in the journey has also increased dramatically. This also makes traffic violations constantly increasing, which brings great restraint to the journey traffic and our days.

In all kinds of traffic violations, speeding occupies a large proportion. As the saying goes, ten incidents occur nine times, because it is difficult for drivers to make precise disposal measures at the first time because of excessive speed. The inertia of the vehicle and the braking system can not reach full control. From the Ministry of Public Security’s calculation of the illegal operation of the journey in the past few years, the ratio of speeding cases to other traffic accidents has remained at a high level. It is not difficult to see the clues, so speeding is always It is considered to be an important factor in the traffic accidents of the journey; therefore, the revocation of speeding is one of the measures to protect traffic safety from the viewpoint of traffic laws. Most domestic revocation violations overspeed are based on radar speedometers for photographic equipment (commonly known as the electronic eye) as things. After the introduction of the new traffic law, the public security and traffic control department has become clearer on the basis of the disposal of speeding people, so the application of radar speedometers has begun to become widespread.

Radar speed application principle

Radar speed measurement uses Doppler frequency modification skills to measure the speed of moving vehicles. This skill is based on the principle of Doppler, which means that when a radar emits microwaves to a moving object, it will reflect back to a radar signal proportional to the target speed, and the internal coil will process the signal and get it. A frequency change, after processing by DSP (digital signal processing) skills, gets the target speed. Changes in frequency occur regardless of whether the approaching vehicle is still far away. Therefore, the vehicle in any direction will be measured to speed (radar speedometer). The principle of radar speed measurement is to use the Doppler effect and has the following characteristics:

(1) The radar beam has a larger illumination area than the laser beam (radio), so the radar velocity is easy to capture and does not require precise aiming;

(2) The radar speed measuring equipment can be installed on the inspection vehicle, and checking the speed at the end of the movement is a very important component of the "active electronic police";

(3) The fixed radar velocity measurement error is ±1 km/h, and the measurement error during sports is ±2 km/h, which is completely satisfactory for the needs of traffic violation investigation;

(4) The beam of the electromagnetic wave emitted by the radar has a certain angle, so the useful speed interval is closer to the laser speed, and the farthest speed interval is 800 m (for large vehicles).

(5) The skills of radar speedometer are old and the quotation is moderate.

(6) The angle of the transmit beam of the radar gun is an important skill guideline. The larger the angulation angle, the more susceptible the accuracy of speed measurement; on the contrary, the impact is smaller.

Radar speedometers are sold for their quotes, accurate speed measurement, use of lunchboxes and speed checks in motion, and are the top choice for speeding disposal by Chinese public security traffic control departments.

Application of radar speed series products in international developed countries

The radar speed measurement equipment of internationally developed countries is relatively complete. Regarding different areas, topography and environment, they are equipped with corresponding radar speed products. No matter whether the fixed measurement is still the mobile measurement or the manual measurement is still the active measurement, it has certain degree of popularity. For example, on the freeway, there are both fixed addresses for speed monitoring, and many patrol cars are moving around the highway to measure. Another example is that most of the roads near the campus are equipped with speed flash cards. From time to time, passing vehicles are monitored and prompted, and students' safety is guaranteed.

China's radar speedometer verification content

The radar speedometer has been used in China for a long time. For the handheld (handheld) radar speedometer, China has already formulated relevant resolute norms. The determination of the radar speedometer should be performed according to the standard.

The following outlines the determination criteria for radar speedometers:

1, the appearance of radar speed and self-check function

The speedometer's appearance and normal operation status shall be in accordance with the regulations. When the speedometer is powered on and placed in the "self-calibration", only the display position shall meet the factory's technical requirements.

2. Verification of microwave transmission frequency

The microwave digital emission string meter with the accuracy requirement is used to verify the microwave transmission frequency of the M0 speed only three times, each time to meet the specified error requirement.

3, accuracy of speed determination

Radar speedometers are sold for their quotes, accurate speed measurement, use of lunchboxes and speed checks in motion, and are the top choice for speeding disposal by Chinese public security traffic control departments. Currently, radar speed monitoring equipment used in road traffic is already very advanced. For example, 3 million or more high-definition cameras monitor 3 lanes together and no coils are buried. High-definition video stream trajectory tracking recognition technology is used. A single set of equipment with a red light, retrograde, yellow line, pressure sub-track line, not in accordance with the provisions of the road and other illegal capture, with bayonet every car will shoot, high-definition video and other functions. There may have been a bit of luck in the past after breaking the rules. Perhaps there is no traffic police here. Perhaps there is no electronic eye installed here, but now it is difficult to escape the eye-catching monitoring and lose points and deduct points. In peacetime, it is easy to violate regulations in the driving process, speeding, red light, retrograde, pressure on the yellow money marching, not following the prescribed lane line, random parking, etc. Many of them do not rely on electronic devices to remind, but we must be careful to avoid them. It can be said that radar speedometers are now everywhere.

Hangzhou Laiyu Technology Co., Ltd. is a science and technology enterprise integrating R&D, design, production, and sales. The company focuses on the intelligent transportation product field, takes the leading international concept as the research and development goal, takes the attitude of excellence as its service tenet, and wholeheartedly Public security traffic management departments and factory docks and other units provide professional products and services. We are constantly pursuing progress, challenging various high-tech products at home and abroad, providing more efficient products and services, and striving to become a rising star in the intelligent transportation industry. The company's main products are: various brands of handheld radar speedometer, its own brand "EWIG" under the HT3000 series of high-definition speedometer, HV300 handheld high-definition speedometer, radar speed screen and mobile traffic lights and other traffic management products. Products are widely used in public security traffic police, troops, institutions, factories and mines, ports and other agencies.