Mobile trolley positioning device and positioning method

Abstract

The invention discloses a mobile car positioning device. The device comprises: a power supply sliding contact wire connected to a three phase power supply, a semiconductor sliding contact wire, a current collector, a first ammeter, a second ammeter and a position calculating apparatus, wherein the semiconductor sliding contact wire is arranged in parallel with the power supply sliding contact wire and forms conduction with the power supply sliding contact wire, and the semiconductor sliding contact wire possesses uniform resistance distribution; the first terminal of the current collector is connected to the power supply sliding contact wire and the semiconductor sliding contact wire, the second terminal of the current collector is connected to the mobile car and provides power for the mobile car; the first terminal of the current collector possesses an electrical brush and the electrical brush is contacted with the power supply sliding contact wire and the semiconductor sliding contact wire; the first ammeter is located on the first terminal of the semiconductor sliding contact wire and measures a first current value; the second ammeter, which is located on the second terminal of the semiconductor sliding contact wire, measures a second current value; the position calculating apparatus is connected to the first ammeter and the second ammeter and calculates the position of the mobile car based on the first current value, the second current value, a power supply voltage value, a length between the first terminal and the second terminal of the semiconductor sliding contact wire and the resistance of the semiconductor sliding contact wire.

Description

technical field [0001] The invention relates to detection and positioning technology, in particular to a mobile trolley positioning device and positioning method. Background technique [0002] Mobile trolleys are often used in production equipment in metallurgy, mining, chemical, textile and other industries. The position detection and positioning of mobile trolleys is a very important task. Currently commonly used mobile car positioning methods include the following: [0003] 1) Use limit switches. A limit switch is installed on the traveling track of the trolley, and when the trolley reaches the limit switch, the action of the limit switch is triggered to send an in-position signal. The limit switches used can be mechanical, photoelectric or inductive, etc. Patent No. 200520040588.X, the patent entitled "Cutter Cart Origin Positioning and Locking Device" discloses this technology. The main advantage of using this positioning technology is that the structure is simple an...

AI Technical Summary

Problems solved by technology

The main advantage of using this positioning technology is that the structure is simple and intuitive, and it is easy to install. However, this method also has some disadvantages: since the limit switch must be installed When it is poor, the limit switch is susceptible to failure or malfunction due to environmental factors such as high temperature, dust and humidity

The main advantage of this technology is that the trolley can travel to any distance according to the needs without being limited by the installation position of the limit switch, and the positioning is relatively accurate, but it also has some shortcomings: because this method needs to install an encoder on the trolley and communication module, so the structure of the trolley is relatively complicated, which is not conducive to the maintenance and replacement of equipment. At the same time, it is difficult to correct the actual running position of the trolley when the wheels of the trolley may slip.

This technology relies on sliding lines to detect the position of the trolley. Therefore, by increasing the number of segmented sliding lines and shortening the distance of segmented sliding lines, the trolley can be positioned freely. However, since each sliding line needs a cable to connect to the PLC input end, when the number of segments is large, this technology is more complicated to implement, and it is more difficult to install and maintain

[0006] 4) Others use positioning methods such as GPS and ultrasonic waves, but these methods are costly and technically complex to implement, and are rarely used in mobile cars in general industrial production occasions

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