The hottest radar sensor contributes to intelligen

Radar sensors contribute to intelligent transportation and smart city

with the introduction of relevant national laws and regulations and the gradual popularization of IOT, we believe that more sensors will be developed and used to contribute to the construction of intelligent transportation and smart city. According to insiders, the future of sensors will focus on the development of intelligence, mobility, miniaturization, integration and diversification

in the application of new technologies, sensors play a huge and unique role. In addition to being a technical application field of materials that can achieve energy conservation in green buildings, with the intelligent development of urban road traffic, sensors, as an essential technology, have been widely used, such as our common image sensors, radar sensors, etc

radar sensors are widely used in the field of intelligent transportation, such as radar tachometer, bayonet speed capture radar, etc. With the rise of smart cities, traffic flow radars and 2d/3d multi-target tracking radars are also gradually popularized. As the sensor of the system eye, it is more and more important to collect the road traffic conditions in real time in order to better control the traffic flow. Common solutions include video and video radar, which can solve the problems of night, rain and fog that cannot be overcome by using pure video technology. According to Swiss rfbeam company, the technology of using multi-target radar sensor and image sensor has been emerging in the field of intelligent transportation. The sensor, together with the camera, can display the speed, distance, angle and other information of multiple vehicles on a picture at the same time, so as to effectively monitor the condition of road vehicles

in China, the traditional speed measuring bayonet needs to install a radar in one lane, and there are certain requirements for the installation position. However, the current multi-target radar can monitor 3-5 lanes with one radar sensor, which greatly reduces the system cost, and the installation method is more flexible. Users can choose roadside installation or gantry installation

with the relevant national laws, but Ras researchers are cooperating with Prof. Dr. Valentine P. ananikov, the introduction of laws and regulations, and the gradual popularization of IOT, we believe that more sensors will be developed and applied to contribute to the construction of intelligent transportation and smart city. According to insiders, the future of sensors will focus on the development of intelligence, mobility, miniaturization, integration and diversification

velocity measuring radar mainly uses the principle of Doppler effect: when the target approaches the radar antenna, the reflected signal frequency will be higher than the transmitter frequency; It promotes the transformation and upgrading of high-tech manufacturing industry. On the contrary, when the target is away from the antenna, the reflected signal frequency will be lower than the transmission probability. In this way, the relative velocity between the target and the radar can be calculated by the change of frequency

the principle of radar velocity measurement, that is, the moving object has the effect of frequency shift on the received electromagnetic wave. The radar velocity meter calculates the moving speed of the measured object according to the frequency shift of the received reflected wave. Therefore, it has the following characteristics:

1. The radar beam has a larger exposure area than the laser beam (Ray), so the radar speed measurement is easy to capture the target, and there is no need to aim accurately

2. Radar speed measuring equipment can be installed on patrol cars to detect the speed in motion, which is a very important part of "mobile electronic police"

3. The measurement error of radar is ± 2km/h, which can fully meet the requirements of investigating and dealing with traffic violations

4. The electromagnetic wave beam emitted by the radar has a certain angle. The domestic production capacity of polyurethane raw material MDI (2 phenylmethane 2 isocyanate) has soared to 3.02 million tons/year, so the effective speed measurement distance is relatively close to laser speed measurement, and the farthest speed measurement distance is 800m (for large vehicles)

5. The beam angle of radar velocimeter is a very important technical index. The larger the opening angle is, the more vulnerable the accuracy of velocity measurement is; On the contrary, the impact is small

6. If the antenna of the speed measuring radar is placed improperly, when the terrain is non plain, the reading of the target vehicle will be replaced by the speed of other vehicles

7. If there are objects with stronger reflection ability next to the target, the velocity radar can only detect objects with stronger reflection ability

8. When there are two vehicles in parallel, the radar speedometer cannot distinguish which vehicle is speeding

9. When the measured signal is reflected for many times, the result measured by the velocity radar will also be wrong

10. Radio waves will interfere with the velocity radar and distort the measurement results

11. The radar sensor can detect the radar velocimeter, but it is extremely difficult to detect the existence of the laser velocimeter