Method and system for acquiring spectrum difference

Abstract

The invention discloses a method and a system for acquiring spectrum difference. The method comprises the following steps: (1) acquiring a plurality of groups of background spectrum data by adopting spectrum measurement equipment; (2) deleting average of the acquired background spectrum data, to obtain the spectrum noise data of the spectrum measurement equipment; and (3) performing validity judgement to the target spectrum data by utilizing the acquired spectrum noise data, and dividing the judged valid target spectrum data and the background spectrum data, to obtain ratio spectrum representing the spectrum difference. The system comprises a data acquisition unit, a spectrum noise data calculation unit, a target spectrum data validity judgment unit and a ratio spectrum calculation unit, which are connected sequentially. The quantity gain relationship of the spectrum data can be reflected by the ratio spectrum; the noise or target spectrum data seriously affected by noise interference can be rejected through performing validity judgment to the target spectrum data, and the calculation of the ratio spectrum can be conducted according to the judged valid target spectrum data, so that the accuracy is increased, and the target precision recognition is facilitated.

Description

technical field [0001] The invention belongs to the cross technical field of spectroscopy and pattern recognition, and more specifically relates to a method and system for obtaining spectral differences. Background technique [0002] Spectrum includes scattering ambient radiation spectrum and self-radiation spectrum, and different objects or substances can be distinguished by using spectral characteristics and spectral differences. Spectral analysis and discrimination technology is one of the fastest-growing qualitative and quantitative analysis techniques, and has been widely used in various fields, especially playing an important role in component identification, fire early warning, and environmental monitoring. [0003] At present, most studies on spectral differences use difference spectrum, which is obtained by directly making a difference between the target spectral data and the reference spectral signal, and the spectral data is collected by a spectrometer; Although ...

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Problems solved by technology

[0003] At present, most studies on spectral differences use difference spectrum, which is obtained by directly making a difference between the target spectral data and the reference spectral signal, and the spectral data is collected by a spectrometer; Although it is simple and easy to understand, it is easily affected by noise. Once the noise is mixed in, it will have a great impact on the accuracy of target recognition; and for weak signals, the results obtained by the difference will be further weakened, which may lead to signal loss and reduce the accuracy of target recognition. Spend

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