公开(公告)号：WO2016178737A1

公开(公告)日：2016-11-10

申请号：PCT/US2016/020639

申请日：2016-03-03

Applicant: SIKORSKY AIRCRAFT CORPORATION

Inventor： LEE, Hyungdae ,  PALMER, Carl ,  KOELLE, Joshua Tyler ,  SHELDON, Jeremy

IPC: G01L25/00

CPC classification number: G01L25/00

Abstract: A system for strain gage calibration includes a data acquisition system operable to receive sensor inputs from a force sensor as a force input and a strain gage as a strain output. The strain gage detects a strain measurement of a structure under test in response to an excitation force applied by an excitation device, and the force sensor detects the excitation force. The system also includes a data processing system operable to perform calibration feature extraction of a plurality of calibration features from time and frequency domain responses of the force input and the strain output, and to determine a calibration factor of the strain gage based on a correlation of the calibration features to reference calibration features. The force input and the strain output are preprocessed before the calibration feature extraction to filter noise, remove outlying data, and temporally align the force input and the strain output.

Abstract translation: 用于应变计校准的系统包括数据采集系统，其可操作以从力传感器接收传感器输入作为力输入，应变计作为应变输出。 应变计响应于由激励装置施加的激励力来检测被测结构的应变测量，并且力传感器检测激励力。 该系统还包括可操作以从力输入和应变输出的时域和频域响应执行多个校准特征的校准特征提取的数据处理系统，并且基于相关性来确定应变计的校准因子 校准功能参考校准功能。 力输入和应变输出在校准特征提取之前进行预处理，以滤除噪声，去除外围数据，并在时间上对准力输入和应变输出。