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1184 results about "Gas analysis" patented technology

Metabolic calorimeter employing respiratory gas analysis

An indirect calorimeter for measuring the metabolic rate of a subject includes a respiratory connector configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes, a flow pathway, and a hygiene barrier positioned to block a predetermined pathogen from the exhaled gases. The indirect calorimeter also includes a flow pathway having a first end in fluid communication with the respiratory connector and a second end in fluid communication with a source and sink for respiratory gases. The flow pathway includes a flow tube through which the inhaled and exhaled gases pass, an outer housing surrounding the flow tube, and a chamber disposed between the flow tube and the first end. The indirect calorimeter also includes a flow meter configured to generate electrical signals as a function of the instantaneous flow volume of inhaled and exhaled gases passing through the flow pathway, and a component gas concentration sensor operable to generate electrical signals as a function of the instantaneous fraction of a predetermined component gas in the exhaled gases as the gases pass through the flow pathway. The indirect calorimeter further includes a computation unit operable to receive the electrical signals from the flow meter and the concentration sensor and operative to calculate at least one respiratory parameter for the subject as the subject breathes through the calorimeter.
Owner:MICROLIFE MEDICAL HOME SOLUTIONS

Method of respiratory gas analysis using a metabolic calorimeter

A method of determining a respiratory parameter for a subject using an indirect calorimeter is provided. The indirect calorimeter includes a respiratory connector for passing inhaled and exhaled gases, a flow pathway operable to receive and pass inhaled and exhaled gases having a flow tube within the flow pathway through which the inhaled and exhaled gases pass, a flow meter for determining an instantaneous flow volume of the inhaled and exhaled gases, a component gas concentration sensor for determining an instantaneous fraction of a predetermined component gas and a computation unit having a processor and a memory. The method includes the steps of initializing the indirect calorimeter and the subject breathing into the respiratory connector if the indirect calorimeter is initialized, sensing the flow volume of the inhaled and exhaled gases passing through the flow pathway using the flow meter and transmitting a signal representing the sensed flow volume to the computation unit. The method also includes the steps of sensing a concentration of a predetermined component gas as the inhaled and exhaled gases pass through the flow pathway using the component gas sensor, and transmitting a signal representing the sensed concentration of the predetermined component gas to the computation unit. The method further includes the steps of calculating at least one respiratory parameter for the subject as the subject breathes through the calorimeter using the sensed flow volume and the sensed concentration of the predetermined component gas, and providing the subject with the at least one respiratory parameter.
Owner:MICROLIFE MEDICAL HOME SOLUTIONS

Comprehensive monitoring system for electric power system transformers

A comprehensive monitoring system for electric power system transformers comprises an IEC61850-based unified modularized CPU (central processing unit) hardware platform, a sensor, a system terminal, at least one of nine monitoring logical devices, and further comprises an expert analysis system, including a thermal management mathematical model and an oil and gas analysis mathematical model, wherein by configuring and starting software, a function for monitoring corresponding LDs (logical device) which are independent of one another is achieved; and by performing independent effective data acquisition on the transformers respectively, and integrating and processing the data by the CPU, the electric power system transformers are comprehensively monitored in a configurable way. The comprehensive monitoring system for the electric power system transformers is convenient and flexible in application; current situations of repeated data acquisition, and shortage of data integration, data processing, information exchange and information sharing are changed; conversion from the conventional mechanism-based timed maintenance to the state-based preventative maintenance is facilitated; the maintenance cost is obviously saved; service lives of the transformers are prolonged; and a customer can obviously reduce the purchase cost and the management cost.
Owner:SHENZHEN SHUANGHE ELECTRIC CO LTD

Smoke gas on-line monitoring system and smoke gas on-line monitoring method

The invention relates to a smoke gas on-line monitoring system and a smoke gas on-line monitoring method, and aims at providing the smoke gas monitoring system and the monitoring method which have the advantages of being simple in structure, high in automation degree and accurate in monitoring. The system comprises a pitot pitometer, a smoke gas sampler, a particulate matter monitor, sampling pipelines and demarcating pipelines, wherein the pitot pitometer, the smoke gas sampler and the particulate matter monitor are all provided with anti-purging devices, signal receiving terminals of all the anti-purging devices are respectively connected with a central controller, and all the anti-purging devices are controlled by the central controller to regularly purge. Smoke gas collected by the smoke gas sampler successively passes through a first refrigerator, a gas filter, a second refrigerator and a membrane type filter, the collected smoke gas is cooled and filtered by the first refrigerator, the gas filter, the second refrigerator and the membrane type filter, and the rest smoke gas finally obtained is fed into a multicomponent gas analysis instrument to be analyzed and detected. For the system, whole calibrated pipelines and partial calibrated pipelines are also arranged, so that the analysis instrument in a line can be wholly calibrated and partially calibrated.
Owner:汇众翔环保科技股份有限公司

Gas analysis device and method

The invention provides a gas analysis device with an in-situ calibration function. The gas analysis device comprises a sampling chamber, an analysis chamber, a gas analyzer and a calibration module, wherein the sampling chamber is connected with a to-be-detected chamber through a first valve and used for leading in sample gas in the to-be-detected chamber; the analysis chamber is connected with the sampling chamber through a second valve, and a vacuum gauge tube is arranged on the analysis chamber and used for monitoring the degree of vacuum of the analysis chamber; the gas analyzer is arranged in the analysis chamber and used for analyzing and testing to-be-analyzed gas; the calibration module is used for providing standard gas for the gas analyzer and quantificationally calibrating the gas analysis device. The invention further provides a gas analysis method. According to the invention, the gas analysis device is periodically calibrated through the calibration module, bakeout degassing is performed through a heater, gas sweeping and protective gas filling are performed through a sweeping and degassing module, a system is enabled to maintain favorable testing background, testing accuracy is guaranteed, gas strength testing at the level of part per billion can be realized, and the gas analysis device is especially suitable for gas analysis and detection in EUV vacuum environment.
Owner:RAINBOW SOURCE LASER RSLASER

Air leakage rate measuring method of sintering machine system

The invention relates to a method for measuring system air leakage rate of a sintering machine in metallurgy. The invention discloses a method for measuring the system air leakage rate of the sintering machine. The method comprises the following steps: firstly, by measuring charge level air speeds at different parts of a machine pallet of the sintering machine, the effective air quantity(Q[inlet]) entering a sinter layer is worked out, by measuring the air speed in a main duct in front of an electrostatic dust collector, the total air quality(Q[total]) pumped in the main duct by an air exhauster is worked out, and by the water content in mixing material, the content of the air converted into vapor is worked out; secondly, the air qualities(Q[total standard], Q[inlet standard] and Q[water standard]) at the standard state are converted all together; and finally, the air leakage rate(B) is worked out according to the formula. The measuring method has strong operability and can overcome the defects of inconvenient measurement, big measurement error and complex air analysis existing in daily production and the defect existing in prior art that the local air leakage rate can only be measured by the air leakage point air speed measuring method. In a word, the method has the advantages of easy operation, accurate measurement and good use effect.
Owner:武钢集团有限公司
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