Abstract: A gas analysis device that comprises a first flow channel through which a sample gas flows, a first analyzer that is arranged in the first flow channel and that performs wet-measurement of a total hydrocarbon concentration in the sample gas, a second flow channel through which the sample gas flows, a non-methane cutter that is arranged in the second flow channel and that removes a hydrocarbon component other than methane in the sample gas, a second analyzer that is arranged downstream of the non-methane cutter in the second flow channel and that performs dry-measurement of a concentration of methane in the sample gas, and a calculation section that calculates a concentration of the hydrocarbon component other than methane in the sample gas using the total hydrocarbon concentration obtained by the first analyzer and a corrected concentration of methane, which is a moisture corrected methane concentration, obtained by the second analyzer.

Abstract: An exhaust gas analysis device analyzes exhaust gas generated when fuel is combusted. This exhaust gas analysis device includes a first analyzer that measures a concentration of a component to be measured in the exhaust gas, a second analyzer that measures a concentration of CO2 in the exhaust gas, a storage portion that stores a hydrogen/carbon ratio, which is a ratio between hydrogen and carbon composing the fuel, or an input receiving portion that receives an input of the hydrogen/carbon ratio, a moisture concentration estimating portion that, based on the measured CO2 concentration and on the hydrogen/carbon ratio of the fuel, estimates a concentration of moisture in the exhaust gas, and a correcting portion that, based on the estimated moisture concentration, corrects the measured concentration of the component to be measured.

Abstract: The present invention includes a first flow path through which a sample gas flows, a first analyzer that is provided in the first flow path to measure total hydrocarbon concentration in the sample gas, a second flow path through which the sample gas flows, a non-methane non-ethane cutter that is provided in the second flow path to remove the hydrocarbon components other than the methane and the ethane in the sample gas, a second analyzer that is provided downstream of the non-methane non-ethane cutter in the second flow path to measure the total methane ethane concentration of the methane and the ethane in the sample gas, and a calculation part that calculates the concentration of the hydrocarbon components other than the methane and the ethane in the sample gas with use of the total hydrocarbon concentration by the first analyzer and the total methane ethane concentration by the second analyzer.

Abstract: In order to secure a separation ability required for an oxidation catalyst such as a non-methane cutter, and to enable a sample gas to be measured accurately, this gas analyzing device is provided with a sample gas line where a sample gas flows, an analyzer that is provided in the sample gas line and that detects the concentration of a specific component contained in the sample gas, a catalyst that is arranged upstream of the analyzer in the sample gas line and that reacts with the sample gas, and a moisture concentration adjusting unit that is arranged upstream of the catalyst in the sample gas line to adjust the moisture concentration of the sample gas.

Abstract: The present claimed invention provides an exhaust gas analysis system using a dilution sampling method with an exhaust gas analysis device that can calculate a measured value such as a concentration of a component to be measured in an exhaust gas with higher accuracy. The exhaust gas analysis device analyzes a diluted exhaust gas, and comprises an analyzing part that measures a component to be measured in the diluted exhaust gas, an introducing path that introduces the diluted exhaust gas into the analyzing part and that has a resistance part, a viscous component concentration determining part that determines a concentration of a viscous component that is in the diluted exhaust gas and that is different from the component to be measured, and a correction part that corrects the measured value measured by the analyzing part in accordance with the concentration of the viscous component.

Abstract: The present invention intends to reduce the contamination level of an introduction path, miniaturize a circuit board, and improve measurement accuracy by adjusting the number of molecules of a measurement target component to flow into an analysis part, and includes: a detector for detecting the concentration of the measurement target component contained in fluid; an introduction path connected to the detector to introduce the fluid into the detector; and a flow rate switching mechanism adapted to, depending on the concentration of the measurement target component, switch the flow rate of the fluid to be introduced into the detector.

Abstract: The present invention includes a first flow path through which a sample gas flows, a first analyzer that is provided in the first flow path to measure total hydrocarbon concentration in the sample gas, a second flow path through which the sample gas flows, a non-methane non-ethane cutter that is provided in the second flow path to remove the hydrocarbon components other than the methane and the ethane in the sample gas, a second analyzer that is provided downstream of the non-methane non-ethane cutter in the second flow path to measure the total methane ethane concentration of the methane and the ethane in the sample gas, and a calculation part that calculates the concentration of the hydrocarbon components other than the methane and the ethane in the sample gas with use of the total hydrocarbon concentration by the first analyzer and the total methane ethane concentration by the second analyzer.

Abstract: In order to secure a separation ability required for an oxidation catalyst such as a non -methane cutter, and to enable a sample gas to be measured accurately, this gas analyzing device is provided with a sample gas line where a sample gas flows, an analyzer that is provided in the sample gas line and that detects the concentration of a specific component contained in the sample gas, a catalyst that is arranged upstream of the analyzer in the sample gas line and that reacts with the sample gas, and a moisture concentration adjusting unit that is arranged upstream of the catalyst in the sample gas line to adjust the moisture concentration of the sample gas.

Abstract: In order to provide an exhaust gas measuring system capable of more accurately correcting errors in measurement results caused by response delays of exhaust gas measuring devices, and the like, the exhaust gas measuring system is adapted to include: a sampling pipe adapted to, from a lead-out port, lead out exhaust gas introduced from an introduction port; one or more types of exhaust gas measuring devices that are connected to the lead-out port and measure predetermined physical quantities related to the exhaust gas flowing through the sampling pipe; a correction device adapted to correct measurement results by the exhaust gas measuring devices; and a pressure sensor adapted to measure the pressure inside the sampling pipe, in which the correction device corrects errors in the measurement results, which are caused by response delays, with the measured pressure by the pressure sensor as a parameter.

Abstract: The present claimed invention provides an exhaust gas analysis system using a dilution sampling method with an exhaust gas analysis device that can calculate a measured value such as a concentration of a component to be measured in an exhaust gas with higher accuracy. The exhaust gas analysis device analyzes a diluted exhaust gas, and comprises an analyzing part that measures a component to be measured in the diluted exhaust gas, an introducing path that introduces the diluted exhaust gas into the analyzing part and that has a resistance part, a viscous component concentration determining part that determines a concentration of a viscous component that is in the diluted exhaust gas and that is different from the component to be measured, and a correction part that corrects the measured value measured by the analyzing part in accordance with the concentration of the viscous component.

Abstract: In order to provide an exhaust gas measurement apparatus having a simpler configuration capable measuring a concentration of a predetermined component contained in exhaust gas under various situations without deteriorating a measurement accuracy, there is provided a sampling mechanism that can select any one of two states, i.e., a first operation mode for outputting the sampled exhaust gas without dilution and a second operation mode for outputting the sampling exhaust gas mixed with dilution gas. In a situation where the sampling mechanism is operating in the first operation mode, in the case where the concentration of the predetermined component measured by a measurement apparatus body exceeds a predetermined first threshold value, the sampling mechanism is controlled such that the first operation mode thereof is changed to the second operation mode.

Abstract: The present invention intends to reduce the contamination level of an introduction path, miniaturize a circuit board, and improve measurement accuracy by adjusting the number of molecules of a measurement target component to flow into an analysis part, and includes: a detector for detecting the concentration of the measurement target component contained in fluid; an introduction path connected to the detector to introduce the fluid into the detector; and a flow rate switching mechanism adapted to, depending on the concentration of the measurement target component, switch the flow rate of the fluid to be introduced into the detector.

Abstract: In order to provide an exhaust gas measuring system capable of more accurately correcting errors in measurement results caused by response delays of exhaust gas measuring devices, and the like, the exhaust gas measuring system is adapted to include: a sampling pipe adapted to, from a lead-out port, lead out exhaust gas introduced from an introduction port; one or more types of exhaust gas measuring devices that are connected to the lead-out port and measure predetermined physical quantities related to the exhaust gas flowing through the sampling pipe; a correction device adapted to correct measurement results by the exhaust gas measuring devices; and a pressure sensor adapted to measure the pressure inside the sampling pipe, in which the correction device corrects errors in the measurement results, which are caused by response delays, with the measured pressure by the pressure sensor as a parameter.

Abstract: In order to provide an exhaust gas measurement apparatus having a simpler configuration capable measuring a concentration of a predetermined component contained in exhaust gas under various situations without deteriorating a measurement accuracy, there is provided a sampling mechanism that can select any one of two states, i.e., a first operation mode for outputting the sampled exhaust gas without dilution and a second operation mode for outputting the sampling exhaust gas mixed with dilution gas. In a situation where the sampling mechanism is operating in the first operation mode, in the case where the concentration of the predetermined component measured by a measurement apparatus body exceeds a predetermined first threshold value, the sampling mechanism is controlled such that the first operation mode thereof is changed to the second operation mode.

Abstract: An exhaust gas analyzing apparatus provided a first filter flow path with a first filter, a second filter flow path provided with a second filter, an exhaust gas analyzing part for analyzing exhaust gas passing through the first filter or the second filter, a flow path switching mechanism for switching between the first filter flow path and the second filter flow path. A pulse purge mechanism is provided for supplying purge gas to the filters, in the filter flow paths, in a pulsed manner, and in the case where a pressure difference between an upstream side and a downstream side of the filter provided in one filter flow path where the exhaust gas flows becomes equal to or larger than a predetermined value, the one filter flow path is switched to the other one, and purge gas is supplied to the filter provided in the one filter flow path in the pulsed manner.

Abstract: The present invention is adapted to be provided with: a first sampling line for sampling raw exhaust gas; a first concentration measuring part that measures the concentration of the predetermined target component contained in the raw exhaust gas; a second sampling line for sampling diluted exhaust gas; a second concentration measuring part that measures the concentration of the target component contained in the diluted exhaust gas; and an arithmetic unit that, with use of first measured concentration, second measured concentration, and a diluted exhaust gas flow rate, calculates a raw exhaust gas flow rate, wherein in a state where the first sampling line and the first concentration measuring part are heated, the first concentration measuring part measures the concentration of the target component contained in the raw exhaust gas.

Abstract: The present invention is adapted to be provided with: a first sampling line for sampling raw exhaust gas; a first concentration measuring part that measures the concentration of the predetermined target component contained in the raw exhaust gas; a second sampling line for sampling diluted exhaust gas; a second concentration measuring part that measures the concentration of the target component contained in the diluted exhaust gas; and an arithmetic unit that, with use of first measured concentration, second measured concentration, and a diluted exhaust gas flow rate, calculates a raw exhaust gas flow rate, wherein in a state where the first sampling line and the first concentration measuring part are heated, the first concentration measuring part measures the concentration of the target component contained in the raw exhaust gas.

Abstract: An exhaust gas analyzing apparatus provided a first filter flow path with a first filter, a second filter flow path provided with a second filter, an exhaust gas analyzing part for analyzing exhaust gas passing through the first filter or the second filter, a flow path switching mechanism for switching between the first filter flow path and the second filter flow path. A pulse purge mechanism is provided for supplying purge gas to the filters, in the filter flow paths, in a pulsed manner, and in the case where a pressure difference between an upstream side and a downstream side of the filter provided in one filter flow path where the exhaust gas flows becomes equal to or larger than a predetermined value, the one filter flow path is switched to the other one, and purge gas is supplied to the filter provided in the one filter flow path in the pulsed manner.

Abstract: An EGR ratio measuring device comprises a pair of nondispersive infrared gas analyzers that correct a water influence and measure a concentration of CO2 in a gas containing water, an intake air introduction line that is connected to an intake air pipe of an internal combustion engine and introduces a part of the intake air into one nondispersive infrared gas analyzer without removing the water, an exhaust gas introduction line that is connected to an exhaust gas pipe of the internal combustion engine and introduces a part of the exhaust gas into the other nondispersive infrared gas analyzer without removing the water, and a temperature adjusting mechanism that keeps a temperature of whole of the introduction lines and a temperature of the nondispersive infrared gas analyzers so as not to condense dew.

Abstract: In order to improve a measurement accuracy of an EGR ratio and to downsize the device and to save labor, the EGR ratio measuring device comprises a pair of nondispersive infrared gas analyzers (11), (12) that have a function of correcting a water influence and that can measure a concentration of CO2 in a gas containing water, an intake air introduction line (L1) that is connected to an intake air pipe (INT) of an internal combustion engine (EG) and that introduces a part of the intake air into one nondispersive infrared gas analyzer (11) without removing the water, an exhaust gas introduction line (L2) that is connected to an exhaust gas pipe (EXT) of the internal combustion engine (EG) and that introduces a part of the exhaust gas into the other nondispersive infrared gas analyzer (12) without removing the water, and a temperature adjusting mechanism (81a˜81c), (82a˜82c) that keeps a temperature of whole of the introduction lines (L1), (L2) and a temperature of the nondispersive infrared gas analyzers (11),