Research On Parallel Acquisition Of Large –scale Infrared Interferometer Data

Fourier spectrometer based on Michelson interferometer, with the advantages of high throughput, high spectral resolution characteristics, is widely used in scientific experiments and space borne field. In the field of the remote sensing it can achieve remote sensing application such as atmospheric composition, surface resources, air pollution in the environment by the high spectral resolution of detection. In the field of meteorology, atmospheric vertical detection based on the interference principle becomes an important means to realize hyper spectral detection in the world. Based on principle of interference detection technology there is a deficiency that a long time is needed to obtain a complete interference figure to get the measured spectral information of the target by spectral inversion. In order to improve the detection efficiency, the focal plane detection technique is introduced. In the process of an interference pattern formation, hundreds of thousands of interferogram signal can also be obtained by different detectors, which greatly improve the detection efficiency, and also achieve higher space resolution and finer ingredient or the detection of temperature and humidity.When the detectors shift from single type to the focal plane, the increasing of the number of detectors will lead to the increase of the number of interferogram. As a result, the interference data increase with a rapid speed. For solving this problem, this paper has carried out large-scale infrared interference signal acquisition, signal processing, and other related areas of research based on the infrared focal plane detector applied in the atmospheric vertical detection.In view of the domestic and foreign high spectrum detection, research and analysis are carried out. Considering the characteristics of 32 x32 infrared focal plane detector and the working principle of the interferometer, an interference system is set up in which infrared focal plane detector is involved. In the aspect of hardware some designs are finished, for example the bias power supply in line with the infrared focal plane, signal condition circuits, signal sampling and conversion circuit. In the aspect of software, the program realizes the signal readout of the focal panel, 32 x32 interference image signal transmission and storage, the analog-to-digital conversion based on 16- channel, 16 bit parallel data transmission using the synchronous clock as shook hands signal.By analyzing of the sampling effect of the interference figure, design improvements were made on the original hardware design, including the detector power supply bias unit for the optimization design of low noise, anti-interference, etc. In the signal acquisition system, the analog and digital power supply design is optimized, and then the PCB design improvement was completed.By software and hardware design and debugging, this subject has realized the acquisition of the interference signal based on the focal plane. In the process of testing and debugging some important things are found, which will affect the acquisition of signal. Some means of solving the problem is made clearly. These works have accumulated preliminary experience for large-scale Fourier signal acquisition, which is significant for the wider application of interferometer.