Electrical control method of rheological measurement device

Abstract

The invention relates to an electric control method of a rheological testing device. A programmable computer controller is used as a controller. The method uses a digital intelligent servo system control the motion speed of a piston rod and a parametric control algorithm to collocate the speed ring parameter of the servo system at different operation speed sections of the piston rod. A temperature sensor and a special conversion module are used for detecting barrel temperature and transforming signals. Control programs including intelligent temperature control, digital intelligent servo and the like are defined with different circulating periods and stored in a user memory of the programmable computer controller according to task grades, so as to control and adjust the temperature of a barrel and the motion speed of the piston rod. The invention realizes the speed regulation ratios index of 1:20000 of the piston rod, obtains good dynamic and static indexes and integrates the precise detection technology and intelligent control algorithm, thereby realizing the control precision of plus or minus 0.1 DEG C of the temperatures of three sections of the barrel and realizing the cooperative control of a complex control object of the multifunctional rheological testing device.

Description

technical field [0001] The invention relates to an electrical control method of a rheological performance testing device, in particular to a coordinated control method for complex control objects of a novel multifunctional and all-electric rheological performance testing device. Background technique [0002] The multifunctional rheological testing device can measure the steady / dynamic rheological properties of the tested material by using the capillary die, and measure the steady / dynamic rheological properties of the tested material by using the injection die and special mold in the steady state and dynamic working modes The mold filling mechanism. Since the temperature of the barrel has a great influence on the rheological properties of the measured material, the device puts forward a higher requirement on the control accuracy of the barrel temperature: ±0.1°C. In addition, the adjustment range of the shear rate is one of the important indicators of the rheological test de...

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Problems solved by technology

In addition, the adjustment range of the shear rate is one of the important indicators of the rheological test device, so the speed ratio of the piston rod is particularly required to be 1:20000, and the dynamic and static performance is good. For the above technical indicators, the traditional separate Electrical control methods such as control instrument, PLC control system and speed regulating device are difficult to realize

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