Automated testing system and method for rheological properties of magnetorheological fluid flow mode

Abstract

The invention discloses a system and method for automatically testing the rheological properties of the flow mode of magnetorheological fluid, including: a hardware module, a rheological property analysis module, a data storage and display module; the hardware module includes a power drive unit, a test unit, a control The processing unit and the signal acquisition unit drive the flow of the magnetorheological fluid, and apply an adjustable magnetic field to the magnetorheological fluid to measure the flow rate and pressure of the magnetorheological fluid in the flow mode; the rheological property analysis module analyzes the flow rate collected by the signal acquisition unit and pressure to obtain the rheological properties of the magnetorheological fluid in the flow working mode; the data storage and display module stores and displays the collected flow, pressure and rheological properties. The invention can conveniently test and study the rheological properties of the magnetorheological fluid in the flowing working mode, realize automatic testing, improve testing efficiency, save labor costs, and ensure the accuracy of testing results.

Description

technical field [0001] The invention relates to the field of magnetorheological fluid testing systems, in particular to a magnetorheological fluid flow mode rheological attribute automatic testing system and a method thereof. Background technique [0002] Magnetorheological fluid is a new type of intelligent fluid material, which is a suspension made of tiny soft magnetic particles and non-magnetic liquid. Magnetorheological fluid exhibits low-viscosity Newtonian fluid characteristics in a zero magnetic field. In a strong magnetic field, the magnetic particles inside the magnetorheological fluid are polarized into chains or columns along the direction of the magnetic field. The generated flux chains will hinder the movement of the liquid and make the magnetic Rheological fluid exhibits the characteristics of Bingham fluid with high viscosity and low fluidity, and its rheology is instantaneous and reversible in a magnetic field, so it is widely used in many fields such as aer...

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Problems solved by technology

However, the rheological properties of magnetorheological fluids in flow mode and shear mode are different, and the test results of the above-mentioned magnetorheological fluid test system in shear mode cannot accurately reflect the characteristics of magnetorheological fluid in flow / squeeze mode. Rheological properties, causing errors in the design, simulation and application of instruments or equipment based on magnetorheological fluid flow / extrusion mode of operation

[0006] In addition, the existing magnetorheological fluid tester has complex mechanical structure, high price, single test function, complicated operation, and inconvenient use. During the test process, only the target parameter values ​​are detected and collected, and there are no other factors that affect the test process. For example, the measurement of the magnetic field, etc., cannot predict the abnormality of the system, which increases the time cost of the tester and reduces the efficiency

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