公开(公告)号：US5485100A

公开(公告)日：1996-01-16

申请号：US71556

申请日：1993-06-04

Applicant: James R. Kogut

Inventor： James R. Kogut

IPC: G01L1/22 ,  G01R17/06 ,  G01R17/00

CPC classification number: G01L1/2275 ,  G01R17/06

Abstract: The output of a bridge measurement circuit is sampled at a time when there is no desired, or expected, bridge output signal, and a balance voltage applied to the bridge measurement circuit is automatically adjusted such that the sample bridge output signal is equivalent to a reference output signal. After the bridge is balanced, the balance voltage is automatically modified by a calibration voltage calculated to provide a known change in the sample bridge output signal, and the sample bridge output signal is compared to a reference output to automatically check the bridge measurement circuit gain. The balance voltage may be automatically modified by multiple calibration voltages, and the sample bridge output signal provides an indication of the linearity of the amplifier gain. The sample bridge output signal is monitored after a change in the balance voltage to automatically provide an indication of the bridge measurement circuit filter cutoff frequency.

Abstract translation: 桥式测量电路的输出在没有期望的或预期的桥输出信号的时候被采样，并且自动调整施加到桥式测量电路的平衡电压，使得采样桥输出信号等于参考 输出信号。 桥接平衡后，通过计算出的校准电压自动修改平衡电压，以提供样本桥输出信号中的已知变化，并将采样桥输出信号与参考输出进行比较，以自动检查桥式测量电路的增益。 平衡电压可以通过多个校准电压自动修改，并且采样电桥输出信号提供放大器增益的线性度的指示。 在平衡电压变化后监测采样桥输出信号，以自动提供桥接测量电路滤波器截止频率的指示。