Multi-modal sensors can provide more useful and detailed information. Visible images contain a large amount of detail and texture information. Short-wave infrared imaging has a strong penetrating ability and performs well in complex environments. Polarization detection can obtain polarization information which conventional imaging techniques cannot obtain. In this paper, we construct a dual-band polarization imaging sensor that can be used for visible light, short-wave infrared, and polarization imaging. An image registration algorithm is applied to obtain multi-modal images of the same scene. Multiple image fusion methods such as Laplacian pyramid transform (LPT), Intensity-Hue-Saturation (IHS) transform, principal component analysis (PCA), and pulse-coupled neural network (PCNN) are compared and analyzed with a qualitative assessment of subjective and objective metrics. Based on the experiments, the advantages and disadvantages of different fusion methods are discussed.
An elastic stroke reduction mechanism based on the principle of differential lever is designed. The mechanism uses flexible hinges to transfer potential energy, and the displacement of the input end is transferred to the output end through the designed reduction ratio, so that the displacement resolution is improved, and the nonlinear and hysteresis errors are small. Firstly, the theoretical model of the stroke reduction mechanism is designed by differential principle and flexible hinge, then the static and modal analysis of the mechanism is carried out by ANSYS finite element, and the stroke reduction ratio of the mechanism is simulated to be 31.55 times. Finally, an experimental platform is built to measure the displacement output characteristics of the mechanism. The experimental results show that the designed stroke reduction mechanism has a displacement reduction ratio of 30.4 times, and the error with the simulation results is only 3.6%, which is consistent. At the same time, the dynamic input test shows that the mechanism has good dynamic stability and controllability.
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