Views: 8 Author: Site Editor Publish Time: 2018-08-21 Origin: Site
The millimeter wave radar and the 79 GHz short range radar currently under the development are most suitable as vehicle-mounted ranging sensors, which is currently accepted internationally. In China, due to factors such as device, cost and ultra-precision manufacturing processes, it is currently possible to prototype millimeter-wave radars at 24 GHz and 38 GHz. Unlike the ranging radar that detects the type of reflected signal, the stereo vision system can detect the beveled object in front, which has the disadvantage of being greatly affected by environmental factors. In addition, the application of mechanical scanning technology can realize the omnidirectional detection function of stereoscopic devices, but the environment is complex and varied, and the amount of image recognition is extremely large. It is still possible to provide reliable and accurate condition information in real time. A subject worthy has depth study and discussion in the field of ultrasonic proximity sensors technology.
Ultrasonic distance measuring sensor is a kind of ranging radar with ultrasonic. It’s the biggest advantage is that it is cheap and can work around the clock without interference,electromagnetic, smoke and dust, low power ultrasonic probes are currently on the market generally not used to detect objects other than l0 m.the Airducer AR30 ultrasonic sensor is produced by AIRMAR can reach a distance of 30 meters, but it cannot be used to measure the target of high-speed movement. For high-speed vehicles, due to inertia, even if the driver takes emergency braking measures, the vehicle will still slide forward a distance ( 5-20m). It can be seen that the ultrasonic sensor cannot be used as a vehicle front radar. However, if the ultrasonic distance measurement sensor can detect a long range (> 20m) moving target, then it can replace the short range radar and is an ideal vehicle-mounted ranging sensor.
At present, car companies have invested a lot of resources to develop advanced anti-collision and safety warning systems for advanced cars with GPS, but the excessive cost limits its application in ordinary cars. In the end,which is greatly reducing the cost of the car's active anti-collision and safety warning system, especially the cost of the underwater acoustic transducer, it will certainly promote the development and application of the car anti-collision warning system.
