A Minimum Heap Based Storage Calculation Method for Mass Flow Inlet Thickness

A calculation method and technology of inlet thickness, which are applied in complex mathematical operations, length measuring devices, manufacturing tools, etc., can solve problems such as low efficiency and complex calculation process, and achieve the goal of avoiding shifting operations, improving calculation efficiency, and reducing the amount of calculation. Effect

Active Publication Date: 2020-05-26
科芃智能科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole calculation process is more complex and less efficient

Method used

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  • A Minimum Heap Based Storage Calculation Method for Mass Flow Inlet Thickness
  • A Minimum Heap Based Storage Calculation Method for Mass Flow Inlet Thickness
  • A Minimum Heap Based Storage Calculation Method for Mass Flow Inlet Thickness

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Embodiment 1

[0050] (1) Minimum heap initialization: At the beginning of the calculation, the minimum heap data is initialized according to the value of the entrance thickness. When the minimum stack stores the time, it is initialized as the remaining time data of the strip passing through the roll gap; when the minimum stack stores the length, it is initialized as the length data of the strip passing through.

[0051] For example, when the minimum heap stores time, the storage at a certain N moment is as follows Figure 5 shown. Figure 5 Store the data of 7 nodes. At this time, the strip passes through the roll gap at a uniform speed. Assume that the distance from the entrance thickness gauge to the roll gap is 7m, and the strip entrance speed is 1m / s. At this time, the data of the first node, which is the root node, indicates that the strip passes through The remaining time of the roll gap is 1s, and the corresponding entrance thickness value at this time is 10um. By analogy, the data...

Embodiment 2

[0070] (1) Minimum heap initialization: At the beginning of the calculation, the minimum heap data is initialized according to the value of the entrance thickness. When the minimum stack stores the time, it is initialized as the remaining time data of the strip passing through the roll gap; when the minimum stack stores the length, it is initialized as the length data of the strip passing through. For example, when the minimum heap stores time, the storage at a certain N moment is as follows Figure 5 As shown, 7 node data are stored in it, the strip passes through the roll gap at a constant speed, assuming that the distance from the entrance thickness gauge to the roll gap is 7m, and the strip entrance speed is 1m / s.

[0071] (2) Obtain the measured value of the inlet thickness: at the starting point of each sampling time, use the inlet thickness measuring device, such as an inlet thickness gauge, to obtain the measured value of the inlet thickness, and insert it into the min...

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Abstract

The invention discloses a mass flow inlet thickness storage calculating method based on a minimum heap. According to the mass flow inlet thickness storage calculating method based on the minimum heap,during storage of inlet thickness data, a data structure of the minimum heap replaces a traditional first-in first-out (FIFO) queue data structure, the time complexity of shifting calculation duringinsert operation in the FIFO queue is usually O(n), however, the time complexity of calculation of insert operation in the minimum heap is O(logn), thus required successive shifting operation during updating of the FIFO queue is avoided, the required calculation amount of shifting operation is reduced, and the calculation efficiency is improved. By means of the method, during storage of the inletthickness data, the data structure of minimum heap replaces the traditional FIFO queue data structure, during searching of an inlet thickness value which is currently used, the minimum heap adopts a sequential structure for storage, the time complexity of sequencing in the FIFO queue is usually O(n2), however, the time complexity of sequencing in the minimum heap is O(nlogn), thus the calculationamount required by searching is reduced, and the searching efficiency is improved.

Description

technical field [0001] The application relates to a method for storing and calculating the thickness of a mass inflow inlet based on a minimum heap, in particular to a control method for improving strip thickness control performance during metal rolling, and belongs to the technical field of metal processing control. Background technique [0002] In the processing of non-ferrous metals such as aluminum and copper and ferrous metals such as steel, the rolling of strips and foils is one of the key processes, which is completed by rolling mills. In the rolling process of strip and foil, in order to improve the performance index of strip thickness difference, the automatic thickness control AGC system is generally used. In the automatic thickness control system, according to the different ways of obtaining the outlet thickness, it can be divided into two types: thickness gauge feedback control and mass flow control. [0003] In the thickness gauge feedback control mode, the exi...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B21B37/18B21B38/04G06F17/10
CPCB21B37/18B21B38/04B21B2038/004B21B2261/04G06F17/10
Inventor罗新斌苏金玲
Owner科芃智能科技(苏州)有限公司