Test bed

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