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    • 1. 发明授权
    • Measuring the concentration of substances suspended in a liquid
    • 测量悬浮在液体中的物质的浓度
    • US4078863A
    • 1978-03-14
    • US606132
    • 1975-08-19
    • Lennart ErikssonGerdt FladdaJan Hill
    • Lennart ErikssonGerdt FladdaJan Hill
    • G01N15/14G01N21/53G01N21/00
    • G01N21/53
    • This invention relates to improvements in measuring the concentration of suspended substances in a liquid, the substances consisting of components of different geometrical size. The liquid is flowing in a pipe and is illuminated transverse to its flow direction by one or more light sources. A detecting means is arranged to detect light spread by the suspended substances in the liquid in another direction than that of the illuminating incident radiation. This detecting means delivers two electrical signals, the first of which represents a D.C. level measured during a predetermined time and corresponding to a detected level of luminous intensity. The second signal represents the number of times during the same said predetermined time that the detected level of luminous intensity has exceeded a definite discriminator level. The equation of the first signal is Ug = cPF + dFF and the equation of the second signal is UF = aPF + bFF, where a, b, c and d are constants, b is substantially less than a, c and d; and PF represents the concentration of suspended material in excess of a certain definite geometrical size; and FF the concentration of suspended material below the same size. The signals from the detecting means are fed to an evaluation means to develop an output signal, which is representative of the sum S = PF + FF of the total concentration of substances of the flowing liquid during the predetermined time. As an alternative, the evaluation means also develops output signals, representative of the concentration of PF and FF separately.
    • 本发明涉及测量液体中悬浮物质浓度的改进,这些物质由不同几何尺寸的组分组成。 液体在管中流动,并通过一个或多个光源横向于其流动方向照射。 检测装置被布置成检测在液体中的悬浮物质在比照射入射辐射的另一个方向上扩散的光。 该检测装置传送两个电信号,其中第一个电信号表示在预定时间期间测量的对应于检测到的发光强度的直流电平。 第二信号表示在检测到的发光强度已经超过确定的鉴别器电平的相同的所述预定时间内的次数。 第一个信号的方程为Ug = cPF + dFF,第二个信号的方程为UF = aPF + bFF,其中a,b,c和d为常数,b大大小于a,c和d; PF表示超过一定的几何尺寸的悬浮物质的浓度; 和FF相同尺寸的悬浮物的浓度。 来自检测装置的信号被馈送到评估装置以产生输出信号,其表示在预定时间期间流动液体的物质的总浓度的总和S = PF + FF。 作为替代方案,评估装置还开发输出信号,分别代表PF和FF的浓度。