| 其他摘要 | High-power DPSSL (Diode Pumped Solid State Laser) integrate advantages of semiconductor lasers and solid-state lasers which is an important direction for the future development. As a new source high-power all-solid-state laser has broad application prospects in the national production and military fields. Content of this dissertation is to develop a control system in KW level of high-power DPSSL. It is conducted by 863 program "Diode Pumped solid state Laser technology and its applications-5kW high power solid-state lasers". The dissertation introduces working principle and structure of the high-power all-solid-state laser control system based on MCU. It carries out the basic characteristics related control systems, the overall control system design, hardware design, software design and results of experiments in detail. The basic features of DPSSL associated with the control system, including I-V laser characteristics, P-I characteristics, failure mechanisms and so on. The overall design of the control system: Microchip's PIC24FJ128DA110 as the core control chip in control system, interactive interface as a PC, sending control signals of laser system, after MCU and interface circuit for processing, send the signal to the power of DPSSL, DPSSL and the water-cooled chassis. A variety of real-time signal of laser system returns to the interface circuit through intelligent sensor pretreatment, and then served on the MCU, and finally through the man-machine interface display. Hardware control system includes the monitoring system, interface circuit, interactive interface circuits, and hardware anti-jamming design. Control system software design includes the main program, multi-channel data acquisition routines, I2C communication routines, digital to analog conversion routines, analog to digital conversion routines, real-time clock routines, USB storage routines, laser power control subroutine, human machine interface and software routines jamming design.
In the dissertation, we built a DPSSL control system, which was based on a PIC24F core hardware platform. In this platform, we applies embedded USB stack provided by Microchip and I2C serial communication technology. This control system could be used to monitor and record the type of operation and protection signals, the time of event, the feedback value of the current of driving power and the feedback value of laser power during operation of DPSSL; In order to improve the operability of controlling system of DPSSL，this dissertation designed and implemented a new kind of human machine interaction system(HMI) on the basis of MODBUS protocol，which was used to communicate between PIC microcontroller and touch-screen．In order to prevent misuse of staff caused unnecessary losses, we applies edge D flip-flops and relay to achieve the operation interlock function; For the accurate and convenient control of the laser output power and laser operating ambient temperature to achieve a constant temperature water-cooled laser systems and laser power feedback control. In this dissertation, MCU was selected as the core control chip because of its particular advantages including simple structure, rich in resources and low cost. Besides, during the control system, the software is programmed using C programming language bases on its advantages of simple programming, high reliability, and good portability. |
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