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Method of soft measurement for concentration of reactant in unsaturated polyester resin reacting kettle

A technology of polyester resin and reactor, which is applied in measuring devices, biological neural network models, instruments, etc., and can solve problems such as slow convergence speed and long training time

Inactive Publication Date: 2012-09-19
CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

Although the BP network has been widely used in many aspects, it also has shortcomings: first, because its learning rate is constant, it takes a long time to train and the convergence speed is slow; second, the BP algorithm uses gradient The descent method can only get the local optimal value, and cannot get the global minimum value by error; again, the network topology can only be determined by experience or based on repeated experiments

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  • Method of soft measurement for concentration of reactant in unsaturated polyester resin reacting kettle
  • Method of soft measurement for concentration of reactant in unsaturated polyester resin reacting kettle
  • Method of soft measurement for concentration of reactant in unsaturated polyester resin reacting kettle

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Embodiment Construction

[0114] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0115] The invention is a method for soft measurement of reactant concentration in an unsaturated polyester resin reactor, comprising the following steps:

[0116] Step 1: Establish a data acquisition system based on OPC technology. Use MATLAB as the OPC client and WinCC as the OPC server to collect real-time process data of the batch reactor. The specific collected data is shown in Table 1-1.

[0117] Table 1-1 Detection parameters of batch reactor

[0118]

[0119] The implementation process of data exchange based on OPC technology between MATLAB and WinCC is as follows:

[0120] First, select the monitoring configuration software as the OPC server, and activate the WinCC configuration software to establish the OPC server for the acquisition system.

[0121] Second, set the names of all servers, group objects, and projects.

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Abstract

The invention relates to a method of soft measurement for concentration of reactant in an unsaturated polyester resin reacting kettle. The method uses a data acquisition module based on OPC (object linking and embedding for process control) technology, an abnormal data eliminating and pretreating module, a data normalization pretreating module, a digital filtering and wavelet treating module, a main factor analyzing module, and a self-adapting genetic algorithm optimized BP (back propagation) neural network soft measurement module. The method with high measurement precision for the soft measurement of the concentration of reactant in the reacting kettle during a batch process is provided, and the difficulty in measuring the reactant concentration in a batch reacting kettle is solved.

Description

technical field [0001] The invention relates to the field of soft measurement for industrial process control, in particular to a soft measurement method for the concentration of reactants in an unsaturated polyester resin reactor during a batch reaction. Background technique [0002] Unsaturated polyester resins (UPR, Unsaturated Polyester Resins) generally refer to polyesters with carbon-carbon unsaturated bonds (such as double bonds) in the molecular chain, which are composed of unsaturated dibasic acids, saturated dibasic acids, saturated dibasic alcohols and Alcohols are made by polycondensation reactions. Due to the excellent process performance, electrical performance, corrosion resistance and mechanical properties of UPR, UPR has been widely used in various aspects of construction, chemical industry, electrical appliances, medicine and other fields, among which the most representative one is glass fiber reinforced material (commonly known as FRP), the demand for poly...

Claims

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Application Information

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IPC IPC(8): G01N33/00G06N3/02
Inventor 孙瑜
Owner CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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