From factory assembly line to warehouse logistics, to park express delivery, restaurant delivery, robots are gradually moving from outdoor to indoor, into our daily life. Among them, service robots in the robot category are especially closely related to our daily life. While there are some signs of doom and gloom, there are some niche areas where robotics companies are making their way into commercial use, such as restaurant delivery robots, which are becoming more common.
In order to understand the specific situation of the landing use of food delivery robots, we visited a number of restaurants that use robots to deliver food, and learned about the deployment of robot companies in various restaurants and the working principle of food delivery robots. According to the introduction of the restaurant service staff, before using the food delivery robot, the restaurant staff should manually push the robot along the food delivery route and preset the road map into the robot system. Several restaurants that use robots to deliver food have placed magnetic strips on the ceiling. It turns out that these magnetic strips are pasted on the ceiling or ground according to the robot's delivery route after having a preset map, and used to guide the robot forward.
The working process of the food delivery robot is to transport dishes from the food fetching port to the input set position, and then return to the food fetching port to wait for the next command. At the food fetching port, the dishes to be delivered to the designated table by the service personnel are put on the tray of the robot one by one. After the table number or box number is determined on the screen, the robot begins to deliver the food. After arriving at the designated location, the server or the customer will bring the dishes to the table from the robot tray. In the process of delivering food, the robot can bypass obstacles through its own obstacle avoidance device. When it encounters moving objects, such as children running around in the restaurant, the robot will stop and voice to remind people in front to move out of the way. When the food arrives, the robot can tell the customer the name of the dish based on the restaurant's own customized voice content. The robot will also give a voice warning if someone tries to take the dish away in the middle of the delivery.
Food delivery robots have also evolved from ground-based tracks to map navigation, from one-tier trays that can deliver only one dish at a time to larger three-tier trays. The technology and design of robots are constantly evolving, and the efficiency of food delivery has been greatly improved. In the survey, we learned from robot companies that most of the food delivery robots that can avoid obstacles more flexibly use laser radar for navigation and realize 3D obstacle avoidance by combining ultrasonic waves and high-definition cameras. Vision sensors and lidar allow food delivery robots to evolve from 2D planar perception to 3D environmental detection. Generally speaking, the robot is about one meter high, which is convenient for customers and waiters to pick up and place their plates. According to our investigation, the robot can travel at a speed of about 1m/s, which not only improves the efficiency of food delivery, but also avoids collisions with people due to the high speed.