公开(公告)号：US3707675A

公开(公告)日：1972-12-26

申请号：US3707675D

申请日：1970-09-11

Applicant: BAILEY METER CO

Inventor： KRECHMERY ROGER L ,  SEABECK LEE A

IPC: G01F1/60 ,  G01R7/00

CPC classification number: G01F1/60

Abstract: A Measuring system for comparing the relative magnitudes of a first and a second D.C. input signal by symmetrically integrating the first input signal between time period intervals proportional to its magnitude relative to the magnitude of the second input signal so that pulses are generated at a frequency which is a multiple of the integrating cycle. The variable frequency pulses are either counted directly or are converted to a frequency variable train of voltage pulses, each of the pulse cycles of the train of pulses having the corresponding periodicity of the variable input frequency and each voltage pulse having a substantially constant pulse width; the train of pulses are used to modulate a voltage source output signal which, when subsequently averaged, provides an output signal that is proportional to the product of the modulated output signal of the voltage source and the input frequency.

Abstract translation: 一种用于比较第一和第二DC输入信号的相对幅度的测量系统，其通过在第一输入信号与第二输入信号的幅度成比例的时间间隔之间对称地积分第一输入信号，使得脉冲以 是积分循环的倍数。 可变频脉冲被直接计数或转换成电压脉冲的频率可变串，脉冲序列的每个脉冲周期具有相应的可变输入频率的周期性，并且每个电压脉冲具有基本上恒定的脉冲宽度; 脉冲串被用于调制电压源输出信号，当其后平均时，提供与电压源的调制输出信号与输入频率的乘积成比例的输出信号。