When the robot is working, it must first have environmental awareness. Environmental awareness technology mainly refers to that mobile robots can obtain environmental information based on the sensors they carry, and extract effective feature information in the environment for processing and understanding, and finally express the environment by establishing a model of the environment Information, such as the distance, angle, size, and shape of obstacles. Environmental awareness is mainly used in robot obstacle avoidance work. Robot obstacle avoidance is one of the most basic and key functions in robot technology. It refers to that when a mobile robot senses the presence of static or dynamic obstacles on its planned route during walking, it updates the path in real time according to a certain algorithm. , Bypass the obstacle, and finally reach the target position.
The current robot perception methods mainly include visual recognition, millimeter wave radar, ultrasound, lidar, and structured light. Each perception method has its own advantages and disadvantages, but under comprehensive consideration, the advantages of millimeter wave radar are more obvious.
Advantages of millimeter wave radar application in the field of robot obstacle avoidance:
1) The millimeter-wave radar sensor is highly sensitive and accurate in data detection, with high sensitivity, small size, low power consumption, long life, and strong anti-interference ability.
2) The robot obstacle avoidance radar can detect the distance and angle of surrounding obstacles. The distance accuracy reaches 0.05 meters, and the angle accuracy reaches 1 degree, which can provide high-precision detection data for robot path planning and three-dimensional modeling. It has a higher cost performance than the currently commonly used lidar and ultrasound.
