The Compound Mechanism Of Animal Discoloration And The Model Of Bionic Color-change

Adaptive color-change camouflage has always been a dream and a goal in the military aera.Previous research on physical control,chemical reaction and other ways of color change has met the technical bottlenecks difficult to overcome and performance limitations,and bionic way is an effective choice.Octopus and chameleons are two kinds of representative animals which have magical color-change camouflage ability in the nature.Their excellent color-change ability depends on the three kinds of cells of their skin,chromatophore,iridophore and melanophore or leucophore,which complexly regulate formation and change of body color.Previous studies on biomimetic color-change of the chameleon or cephalopod mainly mimic only one kind of cell,such as chromatophore or melanophore,and the bionic level is slightly low and the performance is a little poor.Therefore,the mechanism of body color compound regulation is studied in this paper,and the bionic composite color changing model is designed and optimized based on this mechanism,which lays the foundation for visible adaptive color-change camouflage.The following three aspects of research works have been mainly carried out in this paper:Study on the mechanism of biological discoloration and the overall design of bionic model.Through the analysis of chameleon behavioral experiments and epidermal structure characteristics,combined with the literature of octopus(and other cephalopod)color-change mechanism,the essential connotations and similarities of typical animal color-change mechanism are summarized and the key elements of the mechanism of compound discoloration have been revealed in this paper: The three kinds of cells from this two types of animal skin dermis,chromatophore,iridophore and melanophore(Chamaeleonidae)or leucophore(Cephalopoda),mainly regulate the hue,saturation and lightness of body color,but also interact and closely cooperate with each other.Then,based on this compound regulation mechanism,we purposed the “three-in-one” bionic compound discoloration model and overall designs three layers of this model,Tricolor Layer,Rainbow Color Layer and the Gray Layer model,and then validates the necessity of the compound mechanism and the feasibility of this bionic model.Design of the three layers of this model and the digital verification and implementation of the color-change efficiency of this model.About the top layer Tricolor Layer,the optimum color point film superposition method has been invented by trying several kinds of realization methods,such as balloon stretching,funnel pigment and so on.,and then through the digital simulation by Photoshop,the color mixing efficiency and the law of the superposition of the tricolor films are systematically studied.According to the similar methods,a suitable rainbow and grayscale film are designed.After the design of the three layers,further through thedigital simulation,the color mixing efficiency and rule of the three layers compound superposition are systematically studied,and the necessity of "three in one" are further verified.Bionic model implementation and experimental verification.Firstly,based on the design and the research results of simulation optimization of the above model,three kinds of thin films,tricolor films,rainbow film and gray film,are made by the suitable transparent material polyethylene terephthalate(PET).According to the measured background color parameters and the compound color rule of bionic models,the bionic color display device can successfully simulate the multicolored and colorful environmental background,and it can be simply regulated and effectively discoloured.