拉线传感器变角度工作条件下的校准

为了解决静强度变形测量试验中，拉线传感器两维角度偏转引入的测量问题，采用转台提供标准偏转角度、拉线传感器正交安装测试的方法，突破了变角度工作条件下的拉线传感器校准技术，提出了基于正交安装的灵敏度系数校准方法，构建了校准装置，并通过两个正交方向的灵敏度系数合成，提出了拉线传感器正交误差模型的建立方法，最终为拉线传感器变角度工作条件下的现场误差测算提供了方案，实现了静强度试验中变形量测量的快速评定。拉线传感器校准方法的探索，对其在测试领域的应用起到了促进作用。

Calibration of pull wire displacement sensor under variable angle working condition

Wavelength measurement of frequency?stabilized lasers using optical frequency combs (OFC) is a necessary procedure to establish OFC?based wavelength standards. In order to establish the wavelength standard based on OFC and provide technical preparations for laser wavelength calibration, the wavelength of an acetylene?stabilized laser at 1542 nm was measured using a self?developed fiber OFC. By means of frequency beating between the reference laser generated by the OFC and the laser to be measured, the absolute frequency and vacuum wavelength of the acetylene?stabilized laser were obtained through simple algebraic relationship and were compared with the corresponding internationally recommended values. The measured vacuum wavelength of the acetylene?stabilized laser was 1542.38371235742 nm, within the uncertainty range given by CIPM. The stability was measured to be 4.13×10^-13 in 1 s. The wavelength measurement results of the acetylene?stabilized laser by two different OFCs were highly consistent, which further proved the accuracy of OFC?based wavelength measurement. This research is of great significance for conforming to the international development trend of length standards, and will accelerate the application of OFCs in the field of laser wavelength measurement.