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Hash mapping storage method and system for second flow thickness

A technology of mapping storage and second traffic, which is applied to structured data retrieval, rolling mill control devices, database indexing, etc., can solve the problems of complex calculation process and low efficiency of queue data structure and storage method, and improve data retrieval efficiency and improve Calculation efficiency and the effect of reducing the amount of calculation

Active Publication Date: 2020-02-18
RUYUAN DONGYANG UACJ PRECISION FOIL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical defects of complex calculation process and low efficiency of the queue data structure and storage method of second flow control in the prior art, the present invention proposes a hash map storage method of second flow thickness, and the technical solution adopted in the present invention is:

Method used

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  • Hash mapping storage method and system for second flow thickness
  • Hash mapping storage method and system for second flow thickness
  • Hash mapping storage method and system for second flow thickness

Examples

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Effect test

Embodiment 1

[0044] Such as figure 1 As shown, a hash map storage method of second flow thickness control for metal processing and rolling, including the following steps:

[0045] S1. Initialize the hash table, the entrance thickness measuring device measures the thickness of the strip at the entrance of the roll gap, and stores it in the data structure of the hash table;

[0046] S2. Update the stored data in the hash table according to the change of the advancing length of the strip;

[0047] S3. The entrance thickness measurement device obtains the entrance thickness measurement value H from the roll gap, calculates the index of the new data and inserts it into the hash table;

[0048] S4. Retrieve the data to obtain the current entrance thickness value passing through the roll gap used in the second flow thickness control calculation;

[0049] S5. Repeat S2-S4 until the rolling process of one pass is completed, the second flow controller stops counting, and the cycle ends.

[0050] ...

Embodiment 2

[0065] The second aspect of the present invention discloses a hash map storage system for second flow thickness control: it includes a memory and a processor, the memory includes a hash map storage method program for second flow thickness control; the second flow thickness control When the hash map storage method program is executed by the processor, the following steps are implemented:

[0066] S1. Initialize the hash table, the entrance thickness measuring device measures the thickness of the strip at the entrance of the roll gap, and stores it in the data structure of the hash table;

[0067] S2. Update the stored data in the hash table according to the change of the advancing length of the strip;

[0068] S3. The entrance thickness measurement device obtains the entrance thickness measurement value H from the roll gap, calculates the index of the new data and inserts it into the hash table;

[0069] S4. Retrieve the data to obtain the current entrance thickness value pass...

Embodiment 3

[0072] In this embodiment, the hash map storage method of second flow thickness control is put into practical application, and the computer data length is 32, including the following steps:

[0073] S1. The calculation starts and the hash table is initialized.

[0074] After the calculation starts, a hash table needs to be established and initialized, and the key uses the strip length data. Assume that in a certain rolling pass, the data generated by producing the longest strip is 1000, and the length of the computer data generated by rolling one-third of the coil is 333, and the minimum prime number greater than 333 is 337, and the length of the hash table is taken for 337.

[0075] The distance from the entrance thickness measuring device to the roll gap is given as 27m. Assume that the strip advances at a constant speed, the speed is 1m / s.

[0076] At a certain N sampling time, the hash table stores data such as figure 2 shown. Among them, the data in the middle colum...

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Abstract

The invention provides a hash mapping storage method for second flow thickness control. According to the method, second flow thickness control calculation is realized, a data structure of a hash tableis used, inlet thickness measurement values needed in the second flow calculation process are stored in the hash table with the fixed length, the advancing length of a strip serves as a keyword, a hash function is used for calculating a storage index, the thickness value of an inlet entering a roll gap at present is retrieved, and the method participates in calculation of a second flow controller. According to the method, a traditional first-in first-out queue data structure is replaced by a hash table data structure, when the currently used entrance thickness value is retrieved, only one-time calculation is needed, the shifting operation needed in the first-in first-out queue is omitted, the retrieval efficiency is high, the calculation time is short, and the method can be used for entrance thickness calculation in second flow thickness control.

Description

technical field [0001] The invention relates to the technical field of metal processing control, in particular to a hash map storage method and system for second flow thickness. Background technique [0002] In the rolling process of non-ferrous metals such as aluminum and copper and ferrous metals such as steel, in order to effectively control the thickness difference, an automatic thickness control system is generally used. In the automatic thickness control system, the feedback control of the thickness gauge is generally used traditionally, but because the exit thickness gauge is installed on the coiling side of the rolling mill, there is an inherent delay in the measurement of the exit thickness. In order to overcome the delay of outlet thickness measurement, a second flow control method, that is, second flow AGC control, has recently appeared. This second flow thickness control method uses the principle of constant flow before and after the metal material passes throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/22G06F16/23B21B37/16B21B37/18
CPCG06F16/2228G06F16/2282G06F16/23B21B37/18B21B37/165
Inventor 刘斌斌李坤杰谭关炜金国康
Owner RUYUAN DONGYANG UACJ PRECISION FOIL CO LTD
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