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Infrared interference signal collecting system and data processing method

A technology of interference signal and acquisition system, applied in interference spectroscopy, spectrum investigation, etc., can solve problems such as large system noise, no system performance evaluation system, poor non-uniformity of interference images, etc., and achieve signal-to-noise ratio and anti-interference The effect of high ability

Active Publication Date: 2019-03-15
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

It solves the problems of poor non-uniformity of interference image, excessive system noise, poor working stability and no complete system performance evaluation system existing in the prior art

Method used

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  • Infrared interference signal collecting system and data processing method
  • Infrared interference signal collecting system and data processing method
  • Infrared interference signal collecting system and data processing method

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Embodiment Construction

[0035] Power module part:

[0036] Digital power and analog power are provided by two regulated current sources with LDO function. The level conversion chip uses the low power consumption series level conversion chip provided by LINEAR.

[0037] Interface module part:

[0038]The interface module needs to process 3 different types of signals, one is a stable bias voltage, one is to control the timing of the detector work, and the other is the output signal of the detector.

[0039] The bias voltage to be processed in the interface module is generated by the voltage bias circuit, which is built by a level reference source and a resistor divider network. In addition, in order to further ensure the stability of the bias voltage, a capacitor with an appropriate capacitance value is added and the use of diode-assisted biasing circuits.

[0040] The timing of the work to be processed in the interface module is transmitted by the FPGA acquisition module through the transmission li...

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Abstract

The invention discloses an infrared interference signal collecting system and a data processing method. The system is a data collecting and processing system of a Fourier spectrometer which is constructed by a Michelson interferometer and an infrared focal plane detector, a signal detected by the infrared focal plane detector is transmitted into a signal correction module through the cooperative operation of an interface module and an FPGA collecting module, signal processing is conducted on the signal, the signal is saved in an upper computer through a USB 3.0 high-speed transmission passage,and finally data processing and system noise level measuring are conducted. The system and the method have the advantage that the functions of reading and collecting of a medium and long wave focal plane detector in a large area array can be effectively completed by an interference image data collecting system based on the infrared focal plane detector, the system noise level can be measured under a non-vacuum normal laboratory environment through a data processing method, the signal-noise ratio and anti-interference performance of collected data are high, and bases are provided for the interference signal data obtaining using a long wave focal plane detector Fourier spectrometer.

Description

Technical field: [0001] The invention relates to an infrared interference signal acquisition system and a data processing method, in particular to an interference signal data acquisition system and a data processing method of a Fourier spectrometer built by a Michelson interferometer and an infrared focal plane detector. Background technique: [0002] The basic detection principle of the system is Fourier spectral detection, that is, using Michelson interferometer and detector to sample the interference signal of the measured target according to the equal optical path difference, and then perform Fourier transform on the interference light intensity signal, so that Obtain the spectrum of the observed object. The interference signal is generated by the interferometer, and the system is basically composed of a detector, an optical interference system and an electronic data acquisition and processing system. Detectors in the infrared band also need to work in a low-temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/45
CPCG01J3/45
Inventor 高聪华建文陈仁王海英
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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