公开(公告)号：US3678269A

公开(公告)日：1972-07-18

申请号：US3678269D

申请日：1970-11-23

Applicant: METROPHYSICS INC

Inventor： MALEK FRITZ J

IPC: G01J1/18 ,  G01N21/34

CPC classification number: G01J1/18

Abstract: Method and apparatus for measuring the radiation absorption of a fluid specimen and more particularly wherein an electrical signal proportional to the radiant energy received through the fluid specimen is stored and compared with an electrical signal derived from a known reference source, the difference between the signals producing an output signal that is a measure of radiant energy absorbed by the fluid specimen. A pair of capacitors store the electrical signals for comparison and are connected alternately and intermittently to a radiation sensing means by a first pair of gates. A second pair of gates alternately and intermittently energize a pair of radiant energy sources, one source being used as a reference and the other source emitting radiant energy that is transmitted through a specimen fluid undergoing measurement. Both pairs of gates are operated synchronously by a gating circuit that is controlled by a clock and a flip-flop circuit.

Abstract translation: 更具体地说，用于测量流体样本的辐射吸收的方法和装置，更具体地，其中与通过流体样本接收的辐射能成比例的电信号被存储并且与从已知参考源导出的电信号进行比较，产生 输出信号，其是由流体样本吸收的辐射能的量度。 一对电容器存储用于比较的电信号，并且通过第一对门交替地和间歇地连接到辐射感测装置。 第二对门交替地并且间歇地激励一对辐射能源，一个源用作参考，另一个源发射通过正在进行测量的样本流体传输的辐射能。 两对门由一个由时钟和触发器电路控制的选通电路同步工作。