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State identification method during crude oil pipeline blending process

A technology for pipeline blending and process status, applied in control/regulating systems, instruments, adaptive control, etc., can resolve conflicts without considering the interrelationship of various evidences, etc.

Inactive Publication Date: 2013-09-04
HOHAI UNIV
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Problems solved by technology

[0023] Compared with other methods, this combination rule can deal with protruding evidence and has a faster convergence speed, but the Murphy method only performs simple average post-processing of multi-source information evidence, and does not consider the relationship between each evidence, which is its shortcoming. place
At the same time, due to the final fusion of D-S combination rules, there is a problem of global distribution of local conflicts

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  • State identification method during crude oil pipeline blending process
  • State identification method during crude oil pipeline blending process
  • State identification method during crude oil pipeline blending process

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Embodiment Construction

[0076] In the following, based on the proposed new crude oil pipeline blending process state identification method, taking the pipeline operation pressure state identification as an example, the technical solution of the present invention will be further analyzed and explained in detail in conjunction with the accompanying drawings.

[0077] The specific identification method of crude oil pipeline blending process state is as follows: figure 1 As shown in the framework, to carry out reasoning and identification of operating status, it is first necessary to analyze the data collected by multiple sensors to obtain the basic probability assignment (BPA) of different sensors to various operating status subsets; and then send it to the inference recognizer for processing. The BPA is corrected based on the public confidence of each sensor, and then the evidence combination reasoning is carried out to obtain the final identification result of the state of the crude oil blending proces...

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Abstract

The invention discloses a state identification method during crude oil pipeline blending process. The state identification method comprises the following steps: firstly analyzing data collected by a plurality of sensors so as to obtain BPA (Basic Probability Assignment) of various running state subsets by the different sensors; then sending to a reasoning identifier to process, amending the BPA based on the reliability of each sensor firstly by the reasoning identifier; and finally performing evidence combination reasoning to obtain a final identification result of the state during the crude oil pipeline blending process. The state identification method is suitable for the condition that various sensor collected information exists in a control system during the crude oil pipeline blending process. The running state identification precision of the control system during the crude oil pipeline blending process can be obviously improved, the state erroneous judgment rate is effectively reduced, and the system reliability is improved.

Description

technical field [0001] The invention discloses a method for identifying the state of a crude oil pipeline blending process, which is particularly applicable to the situation that a variety of sensors are used to collect information and identify operating states in a crude oil pipeline blending process control system. Background technique [0002] In the crude oil pipeline blending process control system, it is necessary to detect various physical quantities such as pressure, liquid level, flow rate and temperature to identify the operation status of the blending process. Correctly judging the state of the blending process, such as the pressure state of the pipeline and the liquid level state of the component tank (or blending tank), is crucial to the smooth completion of optimal control of crude oil blending. In order to judge whether the pipeline pressure status is "overpressure", "underpressure" or "normal", one or more pressure sensors need to be installed at the pressure...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 叶彦斐
Owner HOHAI UNIV
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