Patent
Personal air sampling system
TLDR
In this article, a thermal anemometer is employed to detect the velocity of the air flowing through a personal air sampling device, and a microprocessor system is employed periodically read the signal from the thermal Anemometer and calculate the sample air flow rate.Abstract:
A thermal anemometer is employed to detect the velocity of the air flowing through a personal air sampling device. A microprocessor system is employed to periodically read the signal from the thermal anemometer and calculate the sample air flow rate. The measured flow rate is integrated over the sample period to provide an indication of the total volume of air sampled. Flow rates need not be calibrated during the sample period to insure accurate collection data, thus providing an automated and accurate means for measuring air quality.read more
Citations
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Patent
Electronic gas meter
TL;DR: An electronic compact gas meter includes a solid state flow sensor for sensing gas flow rate, data acquisition circuits including an analog-to-digital converter coupled to the sensor for controlling same and providing an output indicative of gas flow, and a digital data processor for receiving the gas flow information from the analog to digital converter, processing the information and registering the volumetric gas flow reading at the meter as mentioned in this paper.
Patent
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Display device for vehicle
TL;DR: In this article, a display device for a vehicle that displays an amount of a particulate matter collected in a filter device for exhaust gas purification is presented, which can be used to display the collected amount.
References
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Patent
Chemical tracer method of and structure for determination of instantaneous and total mass and volume fluid flow
TL;DR: In this paper, the authors proposed a method of determining the total mass flow of at least one component of interest in a reacted flowing main fluid in a period of time comprising the introduction of an analyzable tracer component at a known mass rate into a flowing main liquid, mixing the tracer components with the flowing main fluids, reacting the mixture of the tracers and the main fluids in a reactor, analyzing the reacted mixture to determine the concentration of the reaction component and one component in the reaction mixture, and time integrating the product of the ratio between the reaction concentration and the
Patent
Apparatus for automatically measuring particulate emissions in gas flow
TL;DR: A stack sampler for collecting particulate samplings in gaseous emissions includes means for automatically matching the volume rate of flow through the sampler to the flow in the stack as discussed by the authors.
Patent
Method and apparatus for sampling of a particle-bearing gas
John G. Olin,Norman C. Ahlquist +1 more
TL;DR: In this paper, a method and apparatus for sampling a particle-bearing gas in which a vacuum is applied to the gas to generate a stream of gas, the flow of the stream is maintained constant, and particles are collected from the stream.
Patent
Air sampling monitor
TL;DR: In this paper, a portable air sampler for wearing by an industrial worker to monitor the nature of the air breathed by the worker during work shifts, comprises an air filter and a pumping means adapted to draw a known volume of air through the filter on each stroke of the means.