为了防止傅里叶变换红外(FTIR)光谱仪在车载运动过程中产生的振动对光谱仪造成 不良影响,保证光谱仪的信噪比及测量精度,采用角镜式干涉仪结构与单自由度减振系统相结合的FTIR光谱仪系统来提高仪 器抗振性能。对FTIR光谱仪系统进行了几组桌面振动测试实验,验证了角镜式结构具有一定抗振性能,其中单自由度减振系 统对系统抗振性能有明显提高。最后,进行了FTIR光谱仪系统车载实验,结果表明运动中测量的光谱平均信噪比达到静止过 程中平均信噪比的94%,整机系统能够在移动平台上平稳运行,具有良好的抗振性,为FTIR光谱仪的车载运行 检测提供了应用条件。

In order to prevent the negative effect of vibration of vehicle-mounted Fourier transform infrared (FTIR) spectrometer produced in the process of movement on the FTIR spectrometer, and ensure signal-to-noise rate and measurement accuracy of the spectrometer, a FTIR spectrometer system combining a structure of angle mirror and a damping system with single degree of freedom is designed to increase the anti-vibration performance of the spectrometer. A series of test experiments about desktop vibration are conducted to validate the good anti-vibration performance of swing angle mirror structure, which proves that damping system of single degree of freedom could significantly increase the anti-vibration performance of spectrometer. Finally, experiments on vehicle-mounted FTIR spectrometer are carried out. Results show that the mean signal-to-noise rate of the spectrum measured in the process of movement reached 94% of that in the static process. The designed system can run smoothly in mobile platform, which has good anti-vibration performance and can provide application conditions for vehicle-mounted monitoring of FTIR spectrometer.