Method and system for measuring polymer melt temperature field based on capacitance tomography

A technology of electrical capacitance tomography and melt temperature, which is applied in the direction of thermometers, thermometers, and measuring devices that use electric/magnetic elements that are directly sensitive to heat, can solve problems such as the influence of polymer melt flow, and achieve improved acquisition capabilities , Simple structure, fast response effect

Inactive Publication Date: 2012-08-01
SOUTH CHINA UNIV OF TECH
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In addition, the thermocouple network is intrusiv

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  • Method and system for measuring polymer melt temperature field based on capacitance tomography
  • Method and system for measuring polymer melt temperature field based on capacitance tomography
  • Method and system for measuring polymer melt temperature field based on capacitance tomography

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[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings:

[0025] This embodiment provides a method for measuring the temperature field of a polymer melt based on electrical capacitance tomography, wherein:

[0026] See figure 1 , The method includes the following steps:

[0027] Step 10: Measure the capacitance between the capacitor plates of the calibrated capacitive polymer melt temperature field sensor;

[0028] Step 20 is based on the electrical capacitance tomography image reconstruction algorithm;

[0029] Step 30: reconstruct the measured capacitance value into a polymer melt dielectric constant distribution;

[0030] Step 40 establish a relationship model between the dielectric constant of the polymer melt and the temperature;

[0031] Step 50 converts the polymer melt dielectric constant distributi...

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Abstract

The invention discloses a method and a system for measuring a polymer melt temperature field based on capacitance tomography. The method comprises the following steps of: measuring a capacitance value of a capacitance pole plate of a capacitance type polymer melt temperature field sensor, which is calibrated; according to a capacitance tomography image reconstruction algorithm, reconstructing polymer melt dielectric constant distribution based on the measured capacitance value; establishing a relationship model of polymer melt dielectric constant and temperature; and according to the relationship model, converting the polymer melt dielectric constant distribution into the corresponding polymer melt temperature field. By the invention, the polymer melt temperature acquisition ability of a person is improved, the method is superior to the conventional partial single-point measurement mode, the problem of difficulty in measurement of the polymer melt temperature field in the conventional temperature measurement method is solved, and the method has the advantages of non-invasiveness, high response speed, simple structure and the like.

Description

technical field [0001] The invention relates to a method and a system for measuring the temperature field of a polymer melt, in particular to a method and a system for measuring the temperature field of a polymer melt based on electrical capacitance tomography. Background technique [0002] From the carbon fiber used in the fuselage of large aircraft to the brackets required for artificial heart bridges, and even to strategic emerging industries such as high-speed rail, new energy vehicles, and marine equipment, all of them are closely connected with modern polymer molding machinery manufacturing products. The future development prospects of polymer molding machinery Very broad. Studies have shown that in the process of polymer processing, whether the temperature of polymer melt is suitable and stable not only affects the rheological properties and stability of polymer melt, but also directly affects the output, quality and energy efficiency of products. In addition, it als...

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Application Information

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IPC IPC(8): G01K7/34
Inventor 刘桂雄凌鹏涛洪晓斌
Owner SOUTH CHINA UNIV OF TECH
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