The earliest application of AGV is in the warehousing industry. In 1954, the world’s first AGV was put into operation in the warehouse of Mercury Motor Freight Company in South Carolina, USA, to realize the automatic handling of inbound and outbound goods.
With the rapid development of the logistics system, the AGV system researches and designs an unmanned trolley system based on electromagnetic navigation. Through actual hardware experiments, the system can meet the expected design requirements and can be widely used in industrial, military, transportation, electronics, etc. The field has good environmental adaptability, strong anti-interference ability, and target recognition ability.
The concept of AGV
The AGV is a battery-powered, self-guided transport vehicle with automatic guidance devices such as electromagnetic or optical. It can travel along a defined guiding path and is a transport vehicle with safety protection and various transfer functions. Relying on the company’s respective technical algorithms, robotic dispatching system, warehouse management system, and other core technology support, complete sorting, handling, and distribution. It can be automatically charged, a high degree of automation, convenient, small footprint, can be shuttled in various workshops, flexible, and has been widely used in e-commerce, express delivery, warehouse sorting, automobile, tobacco, medicine, 3C, clothing and other types of enterprises, manufacturing.
RFID, which is radio frequency identification technology, is a new solution to solve various magnetic navigation problems. Since RFID is not affected by magnetic strips, laying, and environmental factors, the AGV RFID reader can accurately identify AGV landmarks, enabling control of AGVs at various key nodes.
First, the advantages of long-distance high-speed RFID positioning technology
- It has strong penetrability and can easily penetrate the object to read the label without affecting the reading distance;
- Strong anti-interference ability, other frequency band technology is susceptible to environmental humidity, noise, oil pollution, electromagnetic field, strong vibration, and other factors, easy to read card instability, resulting in data loss or failure to read the label, morning control AGV card reader Not susceptible to interference, good to avoid these problems;
- The card reading distance is moderate and stable. To achieve precise parking, the AGV sensor (ie, the card reader) must have a stable and reasonable reading distance. Too close reading means that the AGV chassis is very low, which undoubtedly increases the equipment failure rate; too far reading means that the positioning is not accurate, the robot has not yet reached the site but has read the labeled parking, and the morning control technology AGV reads The card device solves such problems very well. The CK-G06 can be accurately controlled at 5-10cm. For some special requirements, the card reading distance can also be set to 15-20cm.
- The card reading speed is fast, and the stable reading speed of the tag is more than 2 m/s. When the tag is read during the acceleration of the AGV, there is no possibility that the ordinary RFID reader can not read the electronic tag. In the AGV, the AGV is controlled by PLC. The small vehicle has a wireless communication system, which can communicate wirelessly with the host computer, report its own running position and working status, execute the instructions of the upper computer, and timely transfer the work beat and workload to the upper position. The AGV reads the ground mark through RFID and makes corresponding actions (changing speed, steering, positioning, and parking, etc.). The PLC can control the car according to a preset program, or upload the data to the host computer, and then The instructions of the upper computer to control the car.
