Test method

The invention relates to a test method which is specially used for testing the resistance characteristic of a shock absorber of a magnetic functional fluid containing micron-scale and nano-scale magnetic particles. Namely, the influence of different mixing ratios, electromagnetic field intensities and loading loads of micron-scale and nano-scale magnetic particles in the magnetic functional fluidof the shock absorber on the shock absorption resistance of the shock absorber is tested. The position change of a measured object is measured in a non-contact mode through the laser displacement sensor, the technical effects of high measurement precision, high sensitivity and accurate and efficient signal transmission are achieved for the micro displacement change of the shock absorber piston, and a test result is directly displayed through the oscilloscope and is more visual and faster. A pneumatic loading module is designed, through the design of a control mechanism, an air inlet valve, anair outlet valve and a pil