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What types of AGV trolleys include?

The AGV car has a history of 50 years since its invention. With the expansion of the application field, its types and forms have become diverse. AGVs are often divided into the following types according to the navigation method during the automatic driving of AGVs:

  1. Electromagnetic induction guided AGV

Electromagnetic induction guidance is generally on the ground, and wires are buried along a preset driving path. When a high-frequency current flows through the wire, an electromagnetic field is generated around the wire. Two electromagnetic sensors are installed symmetrically on the AGV. The difference in the strength of the electromagnetic signal can reflect the degree to which the AGV deviates from the path. The automatic control system of the AGV controls the steering of the vehicle according to this deviation, and the continuous dynamic closed-loop control can ensure the stable automatic tracking of the set path by the AGV. This electromagnetic induction guided navigation method is currently used in most commercial AGVS, especially for large and medium-sized AGVs.

  1. Laser-guided AGV

This AGV is equipped with a rotatable laser scanner, and a laser positioning mark with a highly reflective reflector is installed on the walls or pillars along the running path. The AGV relies on the laser scanner to emit a laser beam, and then receives reflections 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 corrects the orientation by comparing it with the built-in digital map, thereby realizing automatic handling.

At present, the application of this kind of AGV is 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 become an infrared-guided AGV and an ultrasonic-guided AGV.

  1. Vision Guided AGV

Vision-guided AGV is a rapidly developing and mature AGV. This AGV is equipped with CCD cameras and sensors, and the on-board computer is provided with an image database of the surrounding environment of the AGV’s desired path. During the driving process of the AGV, the camera dynamically obtains the image information of the surrounding environment of the vehicle and compares it with the image database, so as to determine the current position and make a decision on the next driving.

Since this kind of AGV does not require any physical path to be set manually, it has the best guiding flexibility in theory. With the rapid development of computer image acquisition, storage and processing technology, this kind of AGV is more and more practical.

In addition, there are various forms of AGVs such as ferromagnetic gyro inertial-guided AGVs and optically-guided AGVs.

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