【摘要】 在太阳能电池板PN结生产过程中,有效地控制扩散气体的恒温是至关重要的。以西门子S7-200为控制核心,设计了一种高精度恒温槽。介绍了恒温槽的硬件组成和软件实现。硬件部分由触摸屏、PLC、加热制冷装置、传感器及信号调理板等部分组成。对于温度的控制采用了模糊PID算法,该算法具有更大的灵活性,控制精度更高,控制稳定性更好的优点。实验表明,采用模糊PID控制算法能够很好地实现槽内温度的恒定,所设计的恒温槽在实际工作中控温精度达到0.1℃。更多还原

【Abstract】 It is essential to control constant temperature of diffuse gas effectively during solar panel PN knot production process.A precision thermostat bath is designed.The control core of thermostat bath is SIMATC S7-200.The hardware component and software achieving of thermostat bath are introduced.Hardware is composed of touch screen,PLC,heating equipment,refrigeration plant,sensor and signal conditioning board.Fuzzy-PID control algorithm is adopted in the temperature control unit,which has excellent flexibility,high control precision and control stability.The results of experiment show that adopting the fuzzy-PID control algorithm can attain aim of trough temperature stable.The accuracy of designed thermostat bath achieves 0.1 ℃ when it works.更多还原