Data Acquisition System for Multichannel Fourier Spectrometer

The article discusses the reasons for the development of multichannel fiber-optic Fourier spectrometers and data acquisition systems (DAQs) for them. One of the main requirements for DAQs is formulated - simultaneous sampling of channel sensors. Examples of two-channel simultaneous sampling Fourier spectrometers and technologies of DAQs are given. The rejection of third-party DAQs is justified. The key design points determining the novelty and advantages of the system under development are considered: choosing the number of channels, selecting the type of ADC, selecting the type of computer communication interface, the choice of programming tools. A functional electrical circuit of a multichannel Fourier spectrometer and the structure of the data collection system with ARM core microcontroller as well as the stages of programming the latter are described. Preliminary tests of the data DAQ with simulation of three channels have been carried out one of which was the measuring channel of the Infraspec FSM 2211 spectrometer.