The agv robot has been widely used in the industrial field, so how does the agv robot achieve positioning? This article mainly introduces the positioning method of the agv robot, and details the application of the agv robot photosensitive device positioning method and the agv robot automatic feed car positioning system.
Agv robot positioning principle
Fix the magnetic material on the ground and fix the magnetic sensor under the AGV car body. After the magnetic sensor detects the pre-arranged magnetic strip on the ground, it transmits the detected signal to the on-board controller, and the on-board controller performs the guidance calculation. And control.
AGV positioning method
In order to ensure the accuracy and reliability of positioning, a suitable sensor must be used, and different sensors have formed different positioning methods. There are mainly positioning methods based on photosensitive devices, eddy current sensor positioning methods, photoelectric sensor positioning methods, sensor combination positioning methods, etc.
1. Positioning method based on photosensitive device
The principle of this positioning method is the photoelectric effect. It can be known from the light characteristics of the phototransistor that there is a good linearity between the photocurrent output and the illuminance. As the AGV and the target position continue to approach, its illuminance continues to increase, and the output of the photosensitive device increases accordingly, which can control the positioning of the AGV. This positioning method has a longer effective detection range, which can reach more than 200mm, but the positioning accuracy is low, and the output change of the photosensitive device during the entire positioning process is not obvious, which brings difficulties to the calibration.
2. Positioning method based on eddy current sensor
Eddy current sensor has a large linear measuring range and high sensitivity, and can directly measure the displacement. Using this positioning method enables precise positioning. The main component of the eddy current sensor is the coil. Its shape and size are related to the sensitivity and measurement range of the sensor. The detection range during positioning is generally longer (more than 100mm), so the volume is large. The electromagnetic field generated when the coil works has a magnetic influence on the sensors used in the coordinate guidance method and the electromagnetic induction guidance method.
3. Method based on photoelectric sensor
This positioning method consists of photoelectric counter tubes. Under normal circumstances, the receiver tube can receive infrared signals. When the AGV reaches the destination position, the AGV blocks the infrared rays and causes the control signal to be issued. This positioning accuracy can reach more than 1.5mm. If a small light gap is installed in front of the launch tube, the positioning accuracy can be increased to more than 0.6mm. However, this positioning method cannot control the AGV after the automatic guidance ends and before the final precise positioning.
4. Sensor combination positioning method
Sensor combination positioning method consists of light guidance and precise positioning. The light guide uses a photosensitive device for guidance. Because the effective detection range of the photosensitive device is long, but the accuracy is poor, accurate positioning cannot be performed and the magnetic sensor has high accuracy. The combination method can combine the advantages of the two. When locating, the infrared ray is used as a guide to make it approach the target position. Finally, precise positioning components (such as proximity switches) are used for precise positioning. This method has high accuracy, but the device is more complicated.
Agv robot positioning method-photosensitive device positioning method
The agv robot can automatically load and unload materials, and the transportation of materials can be completed by unmanned driving. In the transportation process of the agv robot, accurate positioning of the material transportation location is a very important link in the transportation process. law.
How does agv robot achieve positioning
One of the positioning methods of the agv robot is based on the positioning method of the photosensitive device, and its principle is to complete the positioning of the agv robot through the photoelectric effect. It can be known from the light characteristics of the phototransistor that there is a good linearity between the photocurrent output and the illuminance. As the avv robot gets closer to the target position, its illuminance continues to increase, and the output of the photosensitive device increases accordingly, which can control the positioning of the agv robot.
How does agv robot achieve positioning
In order to ensure the accuracy and reliability of positioning, a suitable sensor must be used, and different sensors have formed different positioning methods. The agv robot positioning method based on the photosensitive device can reach an effective detection range of more than 200mm. The disadvantage is that the positioning accuracy is low, and the output of the photosensitive device does not change significantly during the entire positioning process, which makes calibration difficult.
