| The coupling packaging process of optical device lens is a typical process in the field of optical device research.The coupling lens has the characteristics of fragility and small size,and it is difficult to operate by artificial eyes alone.In this paper,the optical device coupling lens is selected as the research object.According to the relevant characteristics and technical requirements of the lens itself and the coupling package,the clamping scheme of the coupling lens is firstly discussed and analyzed,and the design of the lens special fixture hardware system is completed.Next,the finite element of the coupling lens and its fixture is created and analyzed accordingly.Secondly,the control performance of the clamp drive source,that is,the voice coil motor,determines the clamping performance of the clamp to a large extent.The basic model of the voice coil motor should be created.The lens and the light-emitting chip itself are then identified with high precision.Finally,the control method of the voice coil motor is researched and improved.On the basis of the algorithm principle and simulation experiments,a test bench for the control system of the voice coil motor fixture is built to meet the requirements of precision,speed and stability.Based on the optical device coupling lens and its fixture,this paper mainly does the following research:(1)Design of Coupled Lens Fixture System and Theoretical Research on Driving Source ModelDiscuss and analyze the clamping method of the lens special fixture,complete the design of the optical device coupling lens special fixture,and determine the final voice coil motor drive fixture scheme.The finite element model of the fixture is established,and the static analysis and related experiments of the voice coil motor-driven fixture are carried out.It is concluded that there is a certain linear relationship between the deformation of the lens and the diameter of the beam waist X of the light spot,which can provide a certain basis for the subsequent control link according to this relationship.The working principle of the voice coil motor,the driving source of the coupling lens fixture,is described,and the system model and transfer function of the voice coil motor are created according to the relevant parameters,which establishes the basis for the optimization of the control performance of the driving source of the coupling lens fixture.(2)Research on Accurate Identification Scheme of Optical Device Coupling LensThe image processing methods of lenses and light-emitting chips are discussed,and the image edge detection and processing methods are mainly analyzed.On the basis of the original Sobel operator edge detection method,the DOG image filtering and denoising method is firstly studied,and some improvements are proposed to make the image denoising effect better.The edge detection method of the Sobel operator is optimized and improved,and the detection direction of the edge of the image is enlarged,which effectively reduces the probability of missed detection and false detection of the image edge caused by noise,and makes the recognized image edge clearer.It saves more real,correct and effective edges on the image,enhances the overall edge recognition effect.The recognition angle error is within 1°,and the distance deviation is within the range of1500um～2000um.It realizes accurate detection and positioning of the lens and light-emitting chip.(3)The clamping control method and experimental study of the coupling lens of the optical deviceBased on the analysis of the mathematical model of the voice coil motor,the control method of the voice coil motor is discussed.And on this basis,an improved particle swarm tuning PID control method is proposed,which can effectively prevent the particle swarm from falling into the misunderstanding of the local optimum,and improve the particle search speed and optimization ability.Experiments have verified the control effects of the three control methods.After the improved particle swarm optimization method is used to adjust the PID parameters,the steady-state error of the system is small,and the steady-state time period is reached.And the success rate and breakage rate of the lens clamped by the fixture are increased by 5% and 3%... |
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