The Research Of Control Mode And Programming On Constant Temperature Control Unit Of Semiconductor Laser Diode

Semiconductor laser have been applied to many fields, we except it can work stable for along time. In addition to the function factor of the semi-conductor laser,many influence factorsuch as the environment temperature unsteady and drive the electric current motion andmultifarious wave to flow out pound at and spread hot etc. problem must be take intoaccount. such as the environment temperature unsteady, drive the electric current motion,multifarious wave to flow out pound at and spread hot etc. problem, for the stable character oflaser, precision temperature control of inner crystal component has important effect. Therefore,the stable and constant control of semiconductor laser diode is rather important. The stableand constant control system of semiconductor laser diode includes constant current control,constant power control and constant temperature control. This paper is belonging to thedesign and research category of constant temperature control system. The constanttemperature control system include liner mode and switch mode. Compare to liner mode, theswitch mode have merits, such as efficiency high and consume small. A little part on thecontent of this paper is to introduce and analyze the research of driver part of mode constanttemperature controller. The temperature of laser-diode is connected with the type of laser-diode. The smallpower laser diode can adopt in brief passive spread the heat; In general, the high power laserdiode array demand water to cold, passing to regulate the circulating piping internal waterdischarge to attain the purpose that control. This kind of controls method accuracy is low,it isalso inconvenient to use. If requests the laser diode to have the high stability, then need to useto make use of the TEC as the performance piece of temperature control system. Currently,many laser temperatures control systems take he TEC as the performance piece.When thedirect current passes the TEC, driving the direction of the electric current of TEC from thechange to carry out to make cold or heating;The nicety regulate with the current or the voltagesizes of the TEC, can carry out precise temperatures control, this is the papers core part--theintelligence temperature control part. This thesis is the performance piece of the temperature control to carry on the constanttemperature control with the TEC.The constant temperature control methods are a lot of,inthis thesis, to the traditional PID control system, modern of Fuzzy control system and Fuzzyselftuning PID parameters control system carries on the theories analysis respectivelycompare, result in got the design Fuzzy- PID based on semi-conductor laser constanttemperature control system. The computer simulink is really to carry on the very important means of science researchto the control system.Simulink through a contrast of various control strategies and projects,excellent and make sure the related parameter, with acquire the best control result, controlsystem design is the technique of the essential to have particularly in the new control strategyand the calculate way researches.The SIMULINK in the MATLAB provides to compare forthe more complicated control system for simplify, valid , accurate, this becoming the mostbeneficial assistant of the engineering control system.This text carry on three kinds of nalysisand calculators about the semi-conductor laser constant temperature control system, itincludes:the traditional PID control unit, pure of Fuzzy control unit and Fuzzy selftuningPID parameters control unit ,and choose the excellent to application finally. Firstly, this paper studies the significance of semicon-ductor laser and analyses theproduct actuality of semiconductor laser constant temperature controller in country andabroad.detailed in the frame structure function of the semi-conductor laser constanttemperature controls unit.Then, in order to let Fuzzy selftuning PID parameters controlmethod can be get the application in the temperature control system, this paper alsodemonstrates in software way. Programs have been accomplish in te...