[특허]Optical substance analyzer and data processor

[미국특허] Optical substance analyzer and data processor 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-021/00 G01N-021/01 G01N-021/35
출원번호	US-0434527 (1995-05-02)
발명자 / 주소	Baum Marc M. Lord Harry C.
출원인 / 주소	Air Instruments and Measurements, Inc.
대리인 / 주소	O'Reilly
인용정보	피인용 횟수 : 35 인용 특허 : 0

초록 ▼

A liquid and gas analyzing system that provides a sample collecting probe that delivers the sample through inert materials to prevent any contamination. For gas analyzing for environmental monitoring process control, a sample collecting probe having a borosilicate glass tube liner connected through an inner spiral tube to the analyzer prevents contamination. The system then delivers the sample to a single pass radiated optical cell by a light beam. The light beam is collected by a miniature CCD array spectrometer and delivered to an industrial PC. The output from the industrial PC is then delivered to a software controlled data acquisition system for analysis. The system is constructed to be a modular in design allowing addition of complementary components for measuring and analyzing different materials. The system described can be used for extractive gas analysis as well as extractive liquid analysis for monitoring stack gases, environmental air or general environmental monitoring and with modifications for breath analysis and human saliva and blood testing. The system is also adaptable for long path remote sense gas monitoring of fence lines and for leak detection.

대표청구항 ▼

[ What is claimed is:] [1.] A spectroscopic method of measuring an analyte in a gas or liquid sampled at a source comprising;constructing sampling means of a material inert to said sample of a gas or liquid;mounting said sampling means at the source of said gas or liquid;collecting a sample of said gas or liquid;delivering a sample of said gas or liquid from said sampling means to an analyzer optical cell mounted at the source of said gas or liquid;irradiating said sample with a source of radiation;detecting radiation from said sample with a spectrometer having an array of at least two detectors to produce data;calculating a signal ratio for said analyte that minimizes spectral interferences from the equations: ]EQU3 ] where: x=the number of measurement points for analyte A,SR (A)=the signal ratio for analyte A,S (M.sub.n)=the signal strength of the nth measured point in the spectrum corresponding to an absorption peak of analyte A,S (R.sub.n)=the signal strength of the nth reference point in the spectrum of analyte A,Mn=chosen measured wavelength,Rn, Rn+1=reference points selected for each measured M.sub.n,.sigma.n=constant adjusting the nth signal ratio for baseline effects,calculate the concentration of said analyte from responses received during said detection;calculate the concentration of spectral interferents from the responses received from said detection using said equations (A) and (B);calculate the extent of interaction of spectral interferents on the response of said analyte;subtracting said interferent interactions calculated to provide a first measurement of said analyte with reduced spectral interferences;iterative processing of said first measurement through a decision matrix of calibration data to provide a refined second accurate measurement of said analyte;whereby an accurate measurement of said analyte with substantially reduced spectral interferents is made.

이 특허를 인용한 특허 (35) 인용/피인용 타임라인 분석

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A	생활필수품
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