The Quality Control Of Low-sugar Kiwi Fruit Preserved Fruit

The people eating habits tend to low sugar and low fat food as the healthconsciousness is established. The traditional kiwi fruit with high sugar contentand nutrients is lost. And at the same time, the automatic control level ofpreserved fruit is low, and in the manual processing production basically, theproduction process is difficult to ensure quality. In view of such a situation, theurgent need to control the kiwi fruit preserved fruit production for improveproduct quality. Currently, as the technology of automatic control is rapidlydeveloped and perfected, it has been widely used in the field of industrial control.It will have important practical significance that automatic control technology isused in the production link to achieve of automatic control of fruit production.Therefore, the temperature control system of steam heating tank, which based onkiwi fruit main production equipment, was designed to monitor the productionprocess, strict control of sugar content of preserved fruits, thus improve thequality of preserved fruit finished products.Design of the temperature Control System in the core of ARM7microprocessor LPC2103, to collect steam heating tank temperature data bydigital temperature sensor DS18B20and be sent to the microprocessor to process,output by the PWM waveform ultimately, conversion by the D/A and the V/Ito control actuator, and control the steam heating tank thereby. Of course, theHuman-computer interaction interface is an indispensable part, so select matrixkeyboard and12864LCD modules. In addition, for facilitate the hardwaresimulations, to increase JATG interface circuit in the design of hardware. ApplyProteus software to design hardware schematic and PCB. Using of specialsoftware for ARM, ADS1.2development environment to design software. Basedon C language development tools, combined with the modular program design,design all the functional modules program of the system, To accomplish systemconfiguration、data acquisition and input set point、fuzzy PID control、the status display and other functions to complete the system software design.PID control was widely applied in many areas of industrial control with itssimple control structure and mature technology, and achieved a very goodcontrol effect. However, the steam heating tank temperature control system is atypical nonlinear time-delay systems, it is difficult to find a precise mathematicalmodel, for which traditional control technology is often difficult to achieve bettercontrol. Fuzzy control does not need to establish a precise mathematical modelof the controlled object, has good stability, reliability and robustness, theseadvantages can solve the problem of system control. In addition, fuzzy PIDalgorithm is easy to tune the control parameters and adjust quickly, Therefore, byanalyzing PID and fuzzy PID control algorithm，selection the fuzzy PID for thecontrol strategy, design of the two input and three output of fuzzy PID controller,and detailed design process of fuzzy control controller.Finally, using Matlab software simulated the conventional PID control andfuzzy PID control algorithm. Simulation results show that the fuzzy PID controlfor on-line self-tuning PID control parameters, to improve the system responsespeed, small overshoot, anti-jamming performance, enhance system stability andreliability to meet the steam heating tank the temperature control systemrequirements.