Shuttle vehicle positioning system and control method

Abstract

The invention provides a shuttle vehicle positioning system and a control method. A radio frequency code reader and a groove type photoelectric switch are installed at the bottom of a shuttle vehicle. Code carriers and a location identification chip are installed close to a rail. The code carriers are arranged in the positions, 3-4 m away from a loading table and an unloading table, of the rail correspondingly. The code carriers and the location identification chip are arranged in the positions of the loading table and the unloading table. The location identification chip corresponds to the groove type photoelectric switch in position. The code carriers are arranged on the rail at an interval of 3-4m. Different numbers are set for the code carriers. The shuttle vehicle is installed on the operation rail. A programmable controller communicates with an industrial control computer on the ground through a wireless communication device. The industrial control computer communicates with the programmable controller installed on the shuttle vehicle through the wireless communication device. The programmable controller is connected with the radio frequency code reader and the groove type photoelectric switch through a port of the programmable controller. According to the shuttle vehicle positioning system and the control method, accurate positioning is achieved through combination of the radio frequency code reader and the groove type photoelectric switch, and the positioning system is stable, reliable, high in precision, low in cost and wide in application range.

Description

technical field [0001] The invention belongs to the field of automatic control of logistics equipment, and in particular relates to a shuttle vehicle positioning system and a control method in a logistics transportation system. Background technique [0002] At present, the positioning of shuttle vehicles generally adopts the following methods: [0003] Laser ranging positioning. The absolute position of the shuttle car and the ground reflection plate is measured by the laser ranging device, so as to know the position of the car. This method has high positioning accuracy. [0004] Barcode positioning. Paste the barcode tape along the track of the shuttle car, install a barcode reading device on the shuttle car, and the barcode reading device can read the barcode information to confirm the current absolute position. [0005] Encoder positioning. An encoder is installed on the driven wheel of the shuttle car, and the encoder counts when the driven wheel and the track ...

AI Technical Summary

Problems solved by technology

[0006] Among the above three methods, the method The positioning is accurate and reliable, and the precision is high, but it is not applicable to the circular track; the method Accurate and reliable positioning, high precision, suitable for straight track and circular track, but the cost is high; way The structure is simple and the cost is low, but when the shuttle is running at high speed, there are vibrations and slips, which affect the encoder count and cause positioning errors

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