Basic programming system (BPS) automatic deflection correction method and system for crane cart

Abstract

The invention relates to a basic programming system (BPS) automatic deflection correction method and a BPS automatic deflection correction system for a crane cart. Left and right guide rails are provided with a bar code strip respectively; corresponding bar code readers are arranged on a cart frame; and a control unit acquires and compares the numerical values read by the readers on two sides in time, judges whether the travels of driving wheels on left and right sides of the cart are synchronous, automatically adjusts the driving wheels on two sides by reducing the rotation speed of the driving wheel on the front side or increasing the rotation speed of the driving wheel on the rear side if the driving wheels are not synchronous, and keeps the two driving wheels are in the same bar code section. Whether the travelling wheels on two sides are deflected and the deflection degree can be judged accurately and timely, and a control circuit can give an instruction for adjusting the rotation speed of a driving motor timely, so that the reliability is high. The deflection detection accuracy of the crane cart is high, so that the deflection can be corrected accurately under the condition of curves and slopes. Moreover, a BPS system has the advantages that: the BPS system has a Proibus function and low cost and can configure with a programmable logic controller (PLC) freely; and the measurement distance can reach 10,000 meters.

Description

technical field [0001] The invention relates to an automatic deviation correction device for a large-span crane cart during its operation, and in particular to a BPS automatic deviation correction method and a deviation correction system for a crane cart. Background technique [0002] Cranes are one of the important equipment for construction operations in industrial and mining enterprises. The existing lifting equipment mainly includes the main girder of the crane, the lifting mechanism, the electrical room of the crane, the trolley mechanism, the cart mechanism, the left outrigger, the right outrigger and the driver's cab. and so on. When the hoisting mechanism is used to lift heavy objects, the hoisting object is lifted or placed in an appropriate position, and the trolley mechanism and the cart mechanism properly adjust the working position of the crane according to the actual operating conditions. [0003] However, during the operation of the crane cart, due to the dif...

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Problems solved by technology

[0003] However, during the operation of the crane cart, due to the difference in the electrical and mechanical characteristics of the motor, the moving distance of the end beams on both sides is different, and the speed of the motor on one side is higher or lower than that of the motor on the other side. rail gnawing phenomenon

This phenomenon often causes the deformation of the main beam, and the large wheels and tracks are severely worn

This defect directly affects the service life of the crane

[0004] In order to ensure that the long-span crane keeps the girders at both ends synchronous during operation, in modern crane technology, it is often used to set a left encoder and a right encoder in the left travel motor and right travel motor of the cart, and compare the pulse data of the encoders After the analysis, the deviation correction signal is detected, and the signal is corrected in time. This method can effectively control the synchronization of the cart within a certain range, but under the influence of the large traveling distance of the cart and the mechanical characteristics of the main girder , the signal of the encoder will produce a large cumulative error, and at the same time affect the accuracy of the synchronization of the traveling mechanism of the cart

[0005] In addition, due to the error of the wheels on both sides of the crane itself, the objects hoisted by the crane are not in the center of the crane. The wheel error caused by the different wear and tear of the wheels on both sides of the crane cannot be corrected by using the encoder deviation correction device after the error occurs in the wheels of the crane cart. Yes, the consequence of the deviation of the crane cart is that the wheels and rails are severely worn, and serious accidents such as motor burnout and crane overturning can also be caused.

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