Method and system for accurately determining roll diameter value of strip steel rolling machine

Abstract

The invention discloses a method and a system for accurately determining a roll diameter value of a strip steel rolling machine. The method comprises the steps as follows: accumulating the strip steel thicknesses to obtain the roll diameter value Dthick; according to a rotary speed, an angle measurement device and a roll diameter measurement device, obtaining the roll diameter value, and checking validity to obtain a synchronous roll diameter value Dsync; synchronously correcting the strip steel thicknesses by using the synchronous roll diameter value Dsync to calculate the roll diameter value Dthick so as to obtain a corrected roll diameter value Dcorr; and calculating by using a second ramp generator according to the corrected roll diameter value Dcorr to generate a continuous actual roll diameter value Dact. According to the method, the accurate roll diameter value is obtained in combination with the advantages of the calculated roll diameter and the measured roll diameter; the calculated roll diameter is high in stability and is hardly influenced by the external environment; and the measured roll diameter is high in precision, and the error of the calculated roll diameter can be satisfactorily corrected after validity checking, so that the high-precision roll diameter value of the rolling machine is finally obtained. Therefore, the finally obtained roll diameter value is a continuously and smoothly changed value and cannot be subjected to step change.

Description

technical field [0001] The invention relates to a method and system for accurately determining the coil diameter value, in particular to a method and system for accurately determining the coil diameter value on a strip steel coiler. Background technique [0002] In the production of strip steel, in order to ensure the quality of the finished steel coil, the constant tension control of the coiler is the key. In order to accurately control the tension, the precise determination of the coil diameter value is the core part of the control. [0003] At present, the commonly used coil diameter calculation method is to calculate the coil diameter according to the linear speed and thickness of the strip steel and the diameter value of the coiler mandrel. The coil diameter is increased by twice the average thickness of the strip. The coil diameter calculated in this way is not affected by the slippage of the steering roller and the eccentricity of the coil diameter, and is the basis f...

AI Technical Summary

Problems solved by technology

However, the measurement of coil diameter is easily disturbed by external factors, and the site environment is relatively complex, such as the steering roller may slip, the center of gravity of the rolled steel coil may be eccentric, dust and water vapor may affect the accuracy of ultrasonic measurement, etc. In addition, the measurement equipment may also fail , so the measured roll diameter value must be verified

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