Lightweight Design And 3D Molding Of Wearable Devices For Carrier Pigeons

In the monitoring of biodiversity and environmental changes,researchers often carry trackers on birds for monitoring,but such trackers have limitations and can cause harm to birds.Therefore,in order to achieve wearable The lightweight and wearing comfort of the device are combined with 3D printing technology to study and design a wearable device suitable for birds.The finite element software was used to simulate the flow field,preliminarily find the load layout position,and determine the load layout position with the center of gravity coincidence calculation.Different design plane porous structures based on average connectivity achieve lightweight wearable devices.The porosity and relative density corresponding to different edge lengths of planar porous structures are calculated.Based on the uniaxial tensile data of TPU material,ABAQUS software was used to obtain the hyperelastic constitutive model with the highest fitting degree and obtain the parameters of the constitutive model.The finite element model of planar porous structure was established and the tensile simulation was carried out to obtain the stress-strain distribution and stress concentration position,providing reference for lightweight design of wearable device.Combined with the melt deposition molding process,the single layer thickness,filling rate,printing speed and other molding parameters were studied,and the best parameters of 3D printing were obtained.According to the optimal printing parameters,the tensile samples of planar porous structure were formed,and the uniaxial tensile test was conducted to analyze the influence of relative density on tensile strength and elongation at break.The fracture morphology of the sample was observed and compared with the simulation results,and the suitable planar porous structure was selected to fabricate the wearable structure by combining the tensile strength,elongation at break and relative density.The weight of the wearable device can be reduced by 69.4% after the lightweight design.Based on the analysis of birds’ load-bearing conditions,the wearable structure was carried out for carrying live carrier pigeons.Indoor carrying experiments proved that carrier pigeons could complete basic life activities such as self-adaptation and flight under the condition of heavy loads.The subsequent outdoor flight and flight trajectory diagram verified the feasibility of the wearable device.