公开(公告)号：US4080657A

公开(公告)日：1978-03-21

申请号：US686913

申请日：1976-05-17

Applicant: Jack Richard Caldicott ,  Alan David Edwards

Inventor： Jack Richard Caldicott ,  Alan David Edwards

IPC: G01G19/04 ,  G01G23/37 ,  G01R17/02 ,  G01G7/00 ,  G06F11/02

CPC classification number: G01R17/02 ,  G01G19/047 ,  G01G23/37

Abstract: In electronic measuring systems the accuracy of measurement is affected by drift not only of the zero but of the gain due to temperature changes, aging and supply conditions. The invention provides an automatic gain correction means so as to maintain an accurate relationship between the magnitude of the characteristic being measured and the value displayed or recorded. The measuring system is such that a train of pulses is counted over a predetermined time interval with a train of pulses representing, by its pulse repetition rate, the magnitude of the characteristic. A reference count is provided and means are provided for generating a pulse train simulating a predetermined magnitude of the characteristic being measured. Means are provided for counting the pulses of the generated pulse train and means are provided for comparing the reference count with the count of the generated pulse train to determine any error in the gain. Means are provided for automatically adjusting the predetermined time interval to correct the effect of the determined gain error.

Abstract translation: 在电子测量系统中，测量的精度受到温度变化，老化和供电条件下的漂移不仅仅是零漂移而是增益的影响。 本发明提供一种自动增益校正装置，以便保持被测量特性的大小与所显示或记录的值之间的准确关系。 测量系统使得一串脉冲以预定的时间间隔被计数，其中脉冲串通过其脉冲重复率表示特性的大小。 提供了参考计数，并且提供了用于产生模拟所测量特性的预定大小的脉冲串的装置。 提供用于对产生的脉冲串的脉冲进行计数的装置，并且提供用于将参考计数与产生的脉冲序列的计数进行比较的装置，以确定增益中的任何误差。 提供了用于自动调整预定时间间隔以校正所确定的增益误差的影响的装置。