AGV guidance method
2021-01-09 14:52:12
Folding magnet gyro guide
This kind of AGV is equipped with a special magnetic position sensor, and a small magnet is installed on the ground along the running path. The AGV relies on the position sensor to sense the position of the small magnet, and then uses the gyroscope technology to continuously control the running direction of the unmanned truck. Realize automatic handling.
Folding electromagnetic induction guide
Electromagnetic induction guidance generally involves laying wires on the ground along a pre-set driving path. When high-frequency current flows through the wires, electromagnetic fields are generated around the wires. Two electromagnetic sensors are installed symmetrically on the AGV. The difference in the strength of the electromagnetic signal can reflect the extent to which the AGV deviates from the path.
The AGV's automatic control system controls the steering of the vehicle based on this deviation, and continuous dynamic closed-loop control can ensure the AGV's stable and automatic tracking of the set path. This electromagnetic induction guided navigation method is currently used in most commercial AGVS, especially suitable for large and medium AGVs.
Folding laser guidance
This kind of AGV is equipped with a rotatable laser scanner, and a laser positioning mark with a highly reflective reflector is installed on the wall or pillar along the running path. The AGV relies on the laser scanner to emit a laser beam, and then receives the reflection from the surrounding positioning marks. After returning the laser beam, the on-board computer calculates the current position of the vehicle and the direction of movement, and compares it with the built-in digital map to correct the position, thereby realizing automatic transportation.
At present, the application of this kind of AGV is becoming more and more common. And according to the same guiding principle, if the laser scanner is replaced with an infrared transmitter or an ultrasonic transmitter, the laser guided AGV can be changed to an infrared guided AGV and an ultrasonic guided AGV.
Basic application of AGV
① Warehousing industry
The warehousing industry is the earliest application place for AGV. 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 transportation of goods in and out of the warehouse.
At present, there are about 20,000 AGVs of various kinds operating in 2,100 large and small warehouses in the world. In the three-dimensional warehouse of Haier Group's development zone that was put into operation in 2000, 9 AGVs formed a flexible automatic handling system in the warehouse, which successfully completed 23,400 daily inbound and outbound goods and parts handling tasks.
② Manufacturing
AGV shows its talents in the production line of the manufacturing industry, completing material handling tasks efficiently, accurately and flexibly. And a flexible logistics handling system can be composed of multiple AGVs, and the handling route can be adjusted in time with the adjustment of the production process, so that a production line can produce more than a dozen products, which greatly improves the flexibility of production and the competitiveness of the enterprise.