As we all know, traditional radar technology is widely used, such as airborne, shipborne, base radar, etc. to detect and image targets. At the level of daily life, we can use radar sensors to achieve weather forecasts, traffic control, and resource surveys. And so on many applications.
In recent years, with the rapid development of semiconductor technology, the size and power consumption of many radars have been greatly reduced. The use of millimeter wave, ultra-wideband technology and multiple transmission and multiple reception, combined with innovative signal processing technology and chips with increasing computing capabilities , The perception function of radar is getting stronger and stronger.
What technology is radar sensing?
The so-called radar sensing is a wireless sensing technology that extracts and discovers the target's position, shape, motion characteristics and motion trajectory by analyzing the received target echo characteristics, and can further infer the characteristics of the target and the environment. Its effect is similar to human eyes and ears.
Compared with other sensors, radar sensing has many unique advantages. For example, compared with visual sensors, radar is not affected by light and darkness, and has the ability to penetrate obstructions, which can better protect personal privacy; compared with ultrasonic technology, radar can sense longer distances and will not affect people. And animals cause harm.
Radar sensing can support very rich application scenarios. For example, millimeter-wave radar has been widely used in the field of assisted driving in automobiles to detect pedestrians and vehicles in front, and realize collision avoidance warning. In addition, as shown in the figure above, radar also has many potential applications in homes, smart buildings, autonomous driving, and wearable devices. With the continuous development of new low-power, small radar sensors, radar technology has been applied in many smart devices and electronic products.
Radar motion recognition
The advantage of radar technology is the detection of movement. The Doppler effect of the target echo is used to observe and interpret the movement state of the target, such as the direction and speed of the movement; when using multi-channel sensors, it can also be observed from different perspectives. Target movement. By collecting the motion state of the target from different perspectives, and combining instantaneous information and historical information for analysis, the resolution of complex motion can be achieved.
The technology of using radar to recognize movement can be applied in different scenarios. For example, in sports, this technology can be used to detect the movement state and trajectory of people and balls. In the home environment, it can also do human fall detection to prevent the elderly from falling. At present, our technology can process radar data to realize the interpretation of human body motion state and trajectory.
Fusion between multiple sensors
In the fusion of radar sensors, by combining the advantages and characteristics of different sensors to achieve more reliable judgments, many researchers have begun to combine radar and video sensing, so that obstacle avoidance can be achieved more reliably. Features. In the future, we will also see more and more applications between radar sensing and artificial intelligence.
