【摘要】 风洞流场移测架一自由度控制系统,由计算机发出信号到DL-03F05M驱动器控制90BC340BH步进电机,电机通过齿轮机构带动丝杆螺母,以测量0～2m高度位置的气流压力,并计算出断剖面不同高度的气流速度。步进电机发出脉冲和方向信号,脉冲信号控制电路包括震荡器电路和定时/计数器电路。计数电路由三个计数通道组成,0通道作脉冲输出,1和2通道为计数。MOVAL,01OUTDX,AL;写定时器0计数初值高8位MOVDX,303HMOVAL,70H;写定时器1控制字OUTDX,ALMOVDX,301HMOVAL,OFFH;写定时器1计数初值低8位OUTDX,ALMOVAL,OFFHOUTDX,AL;写定时器1计数初值高8位MOVDX,304HMOVAL,01HOUTDX,AL;把定时器1的控制条件GATE1通过304H口地址送到74LS273锁存器3结束语该项目的控制系统已用于低速风洞流场校测中,无论从安全性能上还是精度上都达到了标准。更多还原

【Abstract】 Wind tunnel flow field measure is a freeness transfer rack control system, via computer, send out signal to drivers in order to control electricity engine, electricity engine get across gear form to drive silk staff nut, measure 0-2m height airflow pressure, and compute airflow speed in any height. Electricity engine use 90BC340BH, drivers use DL-03F05M. The control board of electricity engine is ISA bus, send out impulse and direction signal. Impulse signal to control circuit involve vibrate implement and timing implement circuit. It is composed get across three 8253 arithmometers, 0 chunnel is impulse output, 1 and 2 is arithmometers.更多还原