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Broadband terahertz time domain spectroscopy analysis method and portable analysis device

A technology of terahertz time domain and analysis device, which is applied in portable devices to analyze the field of broadband terahertz time domain spectrum, can solve the problems of inability to obtain terahertz spectrum, cannot eliminate the interference of terahertz spectrum, etc., to improve flexibility, strong The effect of environmental adaptability

Inactive Publication Date: 2014-09-10
TSINGHUA UNIV +1
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Problems solved by technology

However, there are almost no analytical instruments for broadband terahertz time-domain spectroscopy of a substance or several substances in a complex environment, especially in a real atmospheric environment.
The most important reason for this is that it is impossible to eliminate the interference of the real atmospheric environment on the terahertz spectrum, and it is impossible to obtain the terahertz data that characterize the molecular characteristics and relative content of the tested sample measured by one or several substances at close range and under the condition of no interfering gas. Hertz spectrum

Method used

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  • Broadband terahertz time domain spectroscopy analysis method and portable analysis device
  • Broadband terahertz time domain spectroscopy analysis method and portable analysis device
  • Broadband terahertz time domain spectroscopy analysis method and portable analysis device

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Embodiment 1

[0046] Such as figure 1 The illustrated portable analysis device includes a casing, a case, a display screen, an antenna, a USB interface, a plurality of SD card slots, a single-chip microcomputer and a development circuit board thereof, and the connection and specific settings of these components belong to the prior art in the art, so I won't go into details.

[0047] The environmental parameter detection system includes a temperature sensor, a humidity sensor and a 100 micron particle density sensor arranged on the casing.

[0048] Since the terahertz time-domain spectrometer has the characteristics of high resolution and high signal-to-noise ratio, but it is easily attenuated by the absorption and attenuation of the atmospheric environment (especially water vapor) during the propagation process. The Hertz spectrum will mix the terahertz absorption lines of the atmosphere, and the signal-to-noise ratio will also be reduced, so that the terahertz spectrum of the measured sub...

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Abstract

The invention provides a broadband terahertz time domain spectroscopy analysis method and a portable analysis device.The analysis method comprises the steps of establishing a broadband terahertz time domain spectroscopy characteristic spectrum database for chemicals; acquiring the broadband terahertz time domain spectroscopy characteristic spectrum data of a sample to be tested, and denoising and restoring the characteristic spectrum data; matching the characteristic spectrum data of the sample with the data in the database. The influence of humidity to terahertz spectrum can be eliminated by denoising; the influence of echo to the spectrum can be eliminated; the spectrum noise reduction can be realized by a wavelet transform method. After the method and the device are used, the standard terahertz time domain spectrum data can be obtained; the portable device is used for carrying out field analysis on the data.

Description

【Technical field】 [0001] The present invention relates to terahertz spectrum analysis, in particular to a method for analyzing broadband terahertz time-domain spectrum, and a portable device for realizing the method. 【Background technique】 [0002] Currently, broadband terahertz time-domain spectra can be obtained by various broadband terahertz time-domain spectrometers. However, analytical instruments for broadband terahertz time-domain spectroscopy with unique characteristics are rare. Traditional analytical instruments for broadband terahertz time-domain spectroscopy can usually analyze the terahertz spectra of one or several substances in an environment protected by pure nitrogen or rare gases, and realize the quantitative calculation of the content of each substance. However, there are almost no analytical instruments for broadband terahertz time-domain spectroscopy of one substance or several substances in complex environments, especially in real atmospheric environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3586
Inventor 郑小平姜兆宇刘梦婷程远
Owner TSINGHUA UNIV
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