Design And Application Of Hand-held Laser Cleaning System Based On FPGA

Laser cleaning is a kind of green environmental protection,non-contact,low running cost,and wide applicability of cleaning technology.It overcomes the disadvantages of traditional industrial cleaning,such as large energy consumption,environmental pollution,poor cleaning effect and wide applicability.At present,it is a very popular industrial cleaning method and plays an important role in the development of mechanical industry.With more and more laser cleaning machines put into use,the market also put forward many new requirements for laser cleaning system.At present,the laser cleaning machine can not control the galvanometer in real time and can not control the galvanometer in a long distance.Also the laser energy loss of the optical system is large.With the development and application of FPGA(Field Programmable Logic Gate Array)and other microcontrollers,the above problems can be solved.Therefore,this paper proposes a design scheme of hand-held laser cleaning system based on FPGA,and carries out the corresponding application research.The specific research contents are as follows(1)Overall scheme design.Starting from the structure and working way of hand-held laser cleaning machine,this paper expounds the principle of each component.On this basis,we design the overall scheme of the hand-held laser cleaning machine based on FPGA,and put forward the specific technical requirements for the optical system and the control system According to the technical requirements of the optical system and the optical system design principles,the reasonable choice of the reflector and galvanometer models are done and the F-Theta mirror is designed.Also,a kind of optical structure is designed.The combination of them shows that the laser energy loss of the designed optical system is less than 6%.(2)Hardware design of control system.The hardware design control system is divided into main board module,interface module and Bluetooth module by the modular approach According to the functions of these modules,we find the appropriate hardware,and design the reasonable circuit to realize the function of the module.According to the possible interference in the use environment,some anti-interference measures are put forward.Also,we complete the design of PCB diagram and the PCB board production.(3)Software design of control system.The software design of control system is designed by using state machine method.The software design is divided into driver layer design and human-computer interaction design software.The software design of driver realizes the functions of pulse fiber laser driver logic,galvanometer driver logic,signal acquisition and Bluetooth communication and verified by simulation control output curve.And to realize the friendly human-computer interaction,a kind of Bluetooth mobile phone APP based on low power consumption is designed.(4)Test and application of hand-held laser cleaning system.A series of performance tests of hand held laser cleaning machine show that the laser energy loss rate of the designed optical system is less than 6%,the control accuracy of the control system is more than 99%,and the Bluetooth remote communication can be realized.The application research of laser derusting on HT200 surface was carried out.The influence of laser power,frequency,scanning speed and scanning times on the surface hardness and roughness of HT200 was studied by orthogonal experiment.The research results show that the hand-held laser cleaning system based on FPGA has the advantages of diversification,partial real-time control,remote control and low laser energy loss rate of optical system.And this hand-held laser cleaning machine has a good cleaning effect,strong applicability and reliability,which can be applied in many areas of industrial cleaning.