Provided is an automatic analysis device provided with a scattering optical system which enables a reduction in a reaction solution required for analysis by installing a light source at an angle with respect to a plane of a reaction container and enables a reduction in the running cost of a reagent, and a relatively free design with respect to the size and shape of the reaction container. An automatic analysis device is provided with a reaction container in which a sample and a reagent react with each other, a reaction disk in which the reaction containers are disposed in a line on the circumference thereof, a reaction disk rotation mechanism which rotates the reaction disk, a light source which irradiates the reaction container with measurement light, and a detector which detects light emitted from the light source and transmitted through a reaction solution in the reaction container, the automatic analysis device being provided with an optical system which causes the light from the light source to be incident on the reaction container at a predetermined angle with respect to a plane of the reaction container.

Automatic analysis device

A valid state of an analytical system that includes a light source (102) and a detector (106) can be verified by determining that deviation of first light intensity data quantifying a first intensity of light received at the detector from the light source after the light has passed at least once through each of a reference gas in a validation cell (114) and a zero gas from a stored data set does not exceed a pre-defined threshold deviation. The stored data set can represent at least one previous measurement collected during a previous instrument validation process performed on the analytical system. The reference gas can include a known amount of an analyte. A concentration of the analyte in a sample gas in a measurement cell (112) can be determined by correcting second light intensity data quantifying a second intensity of the light received at the detector after the light passes at least once through each of the reference gas in the validation cell and a sample gas containing an unknown concentration of the analyte compound. Related systems, methods, and articles of manufacture are also described.

Spectrometer with validation cell

A laser gas analyzer includes a wavelength-variable laser having a wide wavelength-variable width, a light-split module configured to split an output light of the wavelength-variable laser into a measurement light and a reference light, a first gas cell into which gases to be measured are introduced, and the measurement light is made to be incident, and a data processor configured to obtain an absorption spectrum of each of the gases to be measured based on a reference signal related to the reference light and an absorption signal related to an output light of the first gas cell, and to obtain concentrations of the respective gases to be measured.

Laser gas analyzer

An exhaust gas analyzer and an exhaust gas analyzing method capable of analyzing the concentration of particulate matter contained in exhaust gas from an internal combustion in real time are provided. The exhaust gas analyzer includes: an exhaust gas passage hole 21 through which the exhaust gas from the internal combustion is introduced; an optical fiber 25 that applies the laser light in a direction perpendicular to a flow of the exhaust gas flowing through the exhaust gas passage hole; a detector 26 that receives the laser light that has passed through the exhaust gas; a photodetector 71 that receives Mie scattered light generated from particulate matter PM contained in the exhaust gas by irradiating the particulate matter with the laser light; and a personal computer 45 as a calculation unit that calculates a concentration of a component in the exhaust gas based on photoreceiving data of a transmitted light intensity obtained from the detector 26, and calculates a concentration of the particulate matter contained in the exhaust gas based on actual measurement data of a scattered light intensity obtained by the photodetector 71.

Exhaust gas analyzer and exhaust gas analyzing method

A gas analyzer capable of measuring a concentration of a gas component in gas at sensor units provided at a plurality of positions in real time by decreasing the number of signals input from the sensor units to an analyzer so as to reduce a data amount input to the analyzer and a gas analyzing method. The gas analyzing method includes the steps of: demultiplexing laser light by a demultiplexer into measurement laser light and reference laser light; letting the measurement laser light pass through gas to be received by a photoreceiver; finding an absorption spectrum absorbed by a gas component in the gas based on a light intensity of the received measurement laser light and of the reference laser light; and analyzing the absorption spectrum to measure a concentration of the gas component.

Gas Analyzer and Gas Analyzing Method

An exhaust gas analyzer capable of real-time analysis of the concentration, temperature, and the like of an exhaust gas component in a cross-section of an exhaust path in a spot-wise manner reduces analysis cost. An exhaust gas analyzer ( 10 ) comprises sensor units ( 11 ) to ( 14 ) disposed along the exhaust path, which comprises an exhaust manifold ( 3 ) for the engine ( 2 ) discharging exhaust gas, an exhaust tube ( 4 ), a first catalyst device ( 5 ), a second catalyst device ( 6 ), a muffler ( 7 ), and an exhaust pipe ( 8 ). Each sensor unit includes an optical fiber ( 25 ) for irradiating the exhaust gas with laser light, and a detector ( 26 ) for receiving the laser light emitted by the optical fiber that has been transmitted through the exhaust gas. Based on the laser light received by the detector, the condition of an exhaust gas component, such as its concentration, temperature, and the like, is measured for the analysis of the exhaust gas. The sensor unit has a through-hole ( 21 ) allowing the passage of exhaust gas that is formed in a shape matched with a cross-sectional shape of the exhaust path. The infrared laser light R is emitted via the optical fiber ( 25 ) into the through-hole ( 21 ), travels across the exhaust path, and is then received by the detector ( 26 ).

Exhaust gas analyzer

PROBLEM TO BE SOLVED: To provide a gas analyzer capable of controlling a semiconductor laser so as to emit a laser beam of a constantly set definite wavelength from the semiconductor laser even if an atmospheric temperature changes and capable of stably measuring the temperature of an exhaust gas based on an absorption spectrum and the concentration of the gas component contained in the exhaust gas. SOLUTION: The gas analyzer is equipped with a laser beam emitting part 20 for emitting a laser beam of a wavelength band containing a wavelength absorbed by a measuring target gas component, an irradiation part 15 for irradiating the exhaust gas with the laser beam emitted from the laser beam emitting part 20, a light receiving part 24 for receiving the laser beam transmitted through the exhaust gas to convert it to an electric signal, and an analyzer 19 for analyzing the absorption spectrum absorbed by the exhaust gas on the basis of the electric signal from the light receiving part 24. The laser beam penetrates a reference cell 22, in which the measuring target gas component known in concentration is sealed, to be received by the light receiving part 24. The wavelength sweeping control of the semiconductor laser 10 is performed so that the peak value of the absorption spectrum obtained by the analyzer 19 may become in a predetermined position in a wavelength band. COPYRIGHT: (C)2009,JPO&INPIT

Gas analyzer and wavelength sweeping control method of laser in gas analyzer

Provided is a gas analyzing apparatus, which comprises a laser light emitting unit (20) for emitting a laser light of a wavelength band containing a wavelength to be absorbed by an object gas component, an irradiation unit (15) for irradiating the inside of an exhaust gas with the laser light emitted by the laser light emitting unit (20), a light receiving unit (24) for receiving and converting the laser light having transmitted through the exhaust gas, into an electric signal, and an analyzing device (19) for analyzing, on the basis of the electric signal from the light receiving unit (24), the absorption spectrum absorbed by the exhaust gas. The gas analyzing apparatus is constituted so that the laser light may be received by the light receiving unit (24) through a reference cell (22), in which the object gas component of a known concentration is confined. The wavelength sweep control of a semiconductor laser (10) is made so that the peak value of the absorption spectrum obtained by the analyzing device (19) may take a predetermined position in the wavelength band.

Gas analyzing apparatus, and laser wavelength sweep control method in the gas analyzing apparatus

PROBLEM TO BE SOLVED: To provide a calibration device for hydrocarbon concentration measuring apparatuses capable of calibrating the hydrocarbon concentration measuring apparatuses for measuring the concentration of hydrocarbons belonging to a group including alkanes and alkenes, a group including aromatic hydrocarbons and a group including alkines out of hydrocarbons included in a measuring object gas based on the intensity of light transmitted through the measuring object gas. SOLUTION: The calibration device 200 includes a fuel supply apparatus 210 for supplying fuel, a gas supply apparatus 220 capable of supplying a combustible gas, a vaporizing device 240 for generating a mixed gas by vaporizing the fuel and combustible gas in a mixed state, a reaction tube 260 in which the mixed gas moves from upstream end to downstream end through the inner space, and a heating device 270 for generating a calibration gas by firing the mixed gas supplied to the inside space of the reaction tube 260 by heating, wherein a gas container 40 is connected to the reaction tube 260 at the position on the downstream end side of a portion where the heating device 270 is disposed. COPYRIGHT: (C)2010,JPO&INPIT

Calibration device for hydrocarbon concentration measuring apparatus

PROBLEM TO BE SOLVED: To provide a miniaturizable chopper heightening an S/N ratio of light received by a photodetector, and to provide a miniaturizable optical analyzer having high analysis accuracy. SOLUTION: A THC measuring device 100 includes an infrared lamp 10 for generating light, a spectrometer 20 for fluctuating a wavelength of light periodically, a photodiode 30 for detecting intensity of light, a gas container storing measuring object gas 1 and transmissible by light generated from the infrared lamp 10, and an optical chopper 50. The optical chopper 50 includes; a MEMS chopper member 51 having a base part 51a on which an opening part 51c transmissible by light is formed, and a rotation part 51b for switching to either state of a light transmissible state and a light blocking state by being rotated corresponding to a voltage application state; and a slit member 56 on which a slit 56a for narrowing the light is formed. COPYRIGHT: (C)2010,JPO&INPIT

Katsutoshi Goto

Papers

Exhaust gas analyzer

Gas analyzer and wavelength sweeping control method of laser in gas analyzer

Gas analyzing apparatus, and laser wavelength sweep control method in the gas analyzing apparatus

Calibration device for hydrocarbon concentration measuring apparatus

Optical chopper and optical analyzer