公开(公告)号：US4253155A

公开(公告)日：1981-02-24

申请号：US7923

申请日：1979-01-31

申请人： Robert A. Freiday ,  Robert L. Hanson ,  David A. Pezzutti

发明人： Robert A. Freiday ,  Robert L. Hanson ,  David A. Pezzutti

IPC分类号： G01R17/06 ,  G01R35/00

CPC分类号： G01R17/06 ,  G01R35/005

摘要： Compensation for errors in an amplitude conversion system caused by inaccuracies in and nonlinearities of system circuit components is realized by employing a self-compensation process in an amplitude measurement system (FIG. 1). In one embodiment first and second reference signals (from 111) are controllably supplied (under control of 105 via A1, A2SW1, SW2, 108, 112, 113 and 103) to a RMS-LOG converter circuit (104) to obtain a measure of the amplitudes of the reference signals (TA, TB) and convert the amplitudes into pulse signals. The pulse signals are supplied to a control circuit (105) for conversion into digital form and storage as reference numbers for future use. A test signal supplied from a remote location over a facility under evaluation is supplied (via T, R, 101, 102, 103) to the RMS-LOG converter (104) where the test signal amplitude (TMEAS) is measured and converted into a pulse signal. In turn, the test pulse signal (TMEAS) is supplied to the control circuit (105), converted into digital form and used in conjunction with the prior stored reference numbers (TA, TB) and prescribed constants in a first prescribed compensation process to generate an output signal (TCORR) representative of the test signal amplitude (TMEAS) compensated for measurement system errors.In another embodiment at least first, second and third reference signals (TA, TB, TC) are employed in conjunction with a test signal measurement (TMEAS) in a second prescribed compensation process to compensate test signal measurements for high order deviations from linearity.

摘要翻译： 通过在幅度测量系统（图1）中采用自补偿过程来实现由系统电路部件的不准确性和非线性引起的幅度转换系统中的误差的补偿。 在一个实施例中，第一和第二参考信号（来自111）被可控地提供（经由A1，A2 + L，SW1，SW2,108,112,113和103的105的控制）到RMS-LOG转换器电路（104）至 获得参考信号（TA，TB）的幅度的度量，并将幅度转换成脉冲信号。 将脉冲信号提供给控制电路（105），以转换为数字形式和存储作为未来使用的参考号。 从经过评估的设备的远程位置提供的测试信号（经由T，R，101,102,103）提供给RMS-LOG转换器（104），其中测量信号幅度（TMEAS）被测量并转换为 脉冲信号。 反过来，将测试脉冲信号（TMEAS）提供给控制电路（105），转换为数字形式，并与先前存储的参考号（TA，TB）和规定的常数结合使用在第一规定的补偿过程中以产生 表示测量信号幅度（TMEAS）的输出信号（TCORR）补偿了测量系统误差。 在另一个实施例中，在第二规定的补偿过程中，至少第一，第二和第三参考信号（TA，TB，TC）与测试信号测量（TMEAS）结合使用以补偿针对线性的高阶偏差的测试信号测量。