State identification method during crude oil pipeline blending process

A technology for pipeline blending and process status, applied in control/regulation systems, instruments, adaptive control, etc., can solve conflicts, do not consider the relationship between various evidences, etc.

Inactive Publication Date: 2015-06-03
HOHAI UNIV
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  • Abstract
  • Description
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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] With reference to the accompanying drawings, based on the proposed new crude oil pipeline blending process state identification method, taking the pipeline operating pressure state identification as an example, the technical solution of the present invention will be further analyzed in detail.

[0077] The status identification method of specific crude oil pipeline blending process is as follows: figure 1 As shown in the framework, to perform inference and identification of operating states, first analyze the data collected by multiple sensors to obtain the basic probability allocation (BPA) of different sensors to a subset of multiple operating states; then send it to the inference identifier for processing, and the inference identifier first The BPA is corrected based on the credibility of each sensor, and then evidence combination reasoning is performed to obtain the final identification result of the crude oil blending process state. Specific steps are as follows:

[00...

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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 crude oil pipeline blending process state identification method, which is particularly suitable for the situation where multiple sensors are used in the crude oil pipeline blending process control system to collect information and perform operating state identification. Background technique [0002] In the crude oil pipeline blending process control system, various physical quantities such as pressure, liquid level, flow rate and temperature need to be detected to identify the operating status of the blending process. Correctly judging the state of the blending process, such as the pressure state of the pipeline and the level of the component tank (or blending tank), is critical to the smooth completion of the optimized control of crude oil blending. In order to determine whether the pipeline pressure status is "overpressure", "underpressure", or "normal", one or more pressure sensors must be installed at the pressure measuring poi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 叶彦斐
Owner HOHAI UNIV
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