Radar and Sonar Detection

Introduction People are accustomed to using one eye as the main cause of perceiving the surrounding environment. Sometimes it is assisted by olfaction. However, when a person is trying to find something at a considerably distance, when the condition of observation is not ideal, it can not be used effectively, such as when a person loses a feeling or does not feel anything at all There are all these visions inadequate visual sense to satisfy individual needs.

Why is the US Navy's radar and sonar the best, why do we need visual observation? In that case, the radar can not detect some objects, and the water situation may severely limit the detection range of sonar. For example, you can see that the periscope of a submarine is out of the detection range of sonar and its radar display is lost by the echo of surrounding waters. Torpedo trails, garbage, flying airplanes, and life rafts are impossible or difficult to find. Sometimes the radar also shows that there are objects that do not actually exist. The explorer may be able to verify the validity of the radar contact report and identify the detected object. Under the conditions of electronic mute, the observation platform is the only means of detection.

With the advent of radar and sonar, and other methods of detecting military hardware that does not rely on human eyes, they disguised. These are called stealth technologies. The shape of the aircraft and vessel may reflect radar pulses from the transmitter and cover the radar absorbing material to degrade its radar characteristics. The use of thermal exploration missiles also brought efforts to conceal the thermal properties of aircraft engines. The method includes an exhaust port shaped to mix high temperature exhaust gas with cold ambient air and place the exhaust port above the fuselage. Multispectral camouflage tries to conceal objects simultaneously, such as infrared, radar, millimeter wave imaging.

The purpose of radar and rider is at least very similar. RADAR stands for "Radio Detection and Ranging". Unlike LIDAR, RADAR uses radio waves instead of light, so the radar's order becomes somewhat difficult. RADAR can be thought of as sending UDP packets, LIDAR as sending TCP packets. In addition, the radar is also used to detect proximity of vehicles near the car from anywhere. GPS stands for "Global Positioning System" and this sensor works very well. But wait, it can tell you where you are at exactly 10 meters. This is already a very difficult task (placing the objects anywhere on the earth), but not for autonomous vehicles. Leave a cliff ahead 10 meters