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一、设计要求在高速液相色谱仪中有两台步进电机,分别带动两个相同的液泵,液泵分别从两种不同质、不同浓度的液体中抽液,打入同一根管道内进行混合.色谱仪要求混合后的液体浓度Q(t)按一定的梯度方式变化,用数学语言表示为: Q(t)=Q(i)+[Q(f)-Q(i)](t/T)~n 式中Q(i)为开始时混合液浓度;Q(f)为结束时混合液浓度;t为时间;T为控制时间,20,40,90,120分钟(人为选择);n为梯度曲线的变化率,0,1/2,1/4,1,2,4(人为选择).
First, the design requirements In the high-speed liquid chromatography with two stepper motor, respectively, driven by two identical pumps, respectively, from two different liquid pump, different concentrations of liquid pumping into the same pipe The chromatograph requires that the mixed liquid concentration Q (t) be changed in a gradient manner in mathematical language as Q (t) = Q (i) + [Q (f) -Q (i)] Q (i) is the concentration of the initial mixture; Q (f) is the concentration of the mixture at the end; t is the time; T is the control time, 20, 40, 90, 120 minutes n is the gradient of the gradient, 0,1 / 2,1 / 4,1,2,4 (human choice).