PID水量控制仿真演示系统环境：DELPHI7+IOCOMP3.02+LMD-TOOLS7.00.59+WINXP 这个系统只是起到抛砖引玉的作用，可能不是很完善，采用的是位置PID控制法-PID control of water environment simulation demo system: DELPHI7+ IOCOMP3.02+ LMD-TOOLS7.00.59+ WINXP the system just to play forward role, may not be perfect, using the location of PID control method
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