Design And Implementation Of Multifunctional Laser Processing Control System Based On Internet Of Things

Laser is widely used in the field of industrial processing,deficiencies of current market mainstream laser processing equipment in processing and management fields are listed as follows:1.Single laser and output laser wavelength range is limited.2.Focus on laser power,ignore the laser pulse width of Q switch,the number of Q switch pulse width and other laser parameters.the laser parameters are not fully controlled which leads to high quality laser application difficultly.3.System of single pulse processing on same point with time intervals on the inner surface of cylinder liner designed before is limited to processing low spindle speed and small bore engine cylinder liner.4.Position sensor is necessary to achieve system of single pulse processing on same point with time intervals on the plane with low efficiency and limited short laser Q switch pulse.5.Function is pool and can not meet the two-dimensional plane processing,three-dimensional machining and special curved surface processing need.6.System is not equipped with database system,the processing data can not be effectively managed and cant not achieve remotely processing and management application.7.System only achieves laser marking of equal proportion pixel image without bigger scale pixel image.In view of the current mainstream laser system problems and the inevitable trend of the industrial 4.0,laser system needs to be intelligent upgraded under the big data environment.this project will complete design and implementation of multifunctional laser processing system,based on the remote control technology.Combined with the processing requirements,use STM32 micro-controller and FPGA as the control center,C++ language to design software to complete the following application modules with independent functions:1.Take inner surface of internal combustion engine cylinder as the processingobject,laser micro processing system based Mega128 MCU with serial working timing is updated with based parallel timing control system based on the FPGA,which is equipped with hand-held wireless control terminal under 532 nm laser.2.Design method named “method of return error deviation” to achieve system of the plane process of single pulse processing the same point with time interval and Process laser spot array,mesh and groove shape with dual wavelength laser.3.Analyze CAD files and convert CAD files to instructions to control the dual wavelength laser and motion platform with laser auto-focus and achieve completion of the central rotary surface laser processing.4.Design laser processing database system based on ODBC data source,use SIM900 module as remote control terminal,use W5500 TCP/IP protocol stack to design DRM remote management system.5.Design MCU WEB server and use browser terminal to control laser processing system remotely.6.Select industrial level camera with model of HD-GY500 to realize indicator light auto focus and design dual optical path automatic switching and focusing subsystem.7.Design the method named "four grid scanning method" to make pixel image VECTOR conversion,based on the Opencv2.4 image library and complete the pixel image arbitrary proportional laser marking.Test each subsystem and the results show that all subsystems work well with stable process.In this paper,Design the multifunctional laser processing control system based on the Internet of things.For different objects or different parts of same objects,choose different processing methods to meet various needs.At the same time,the system is equipped with database management system to facilitate processing equipment management,which is a multifunctional laser processing platform with real sense of the Internet of things.