초록 ▼

Portable air sampling systems and methods are provided for intermittently sampling air in the breathing zone of a person over extended periods of time. Air sampling system performance can be continuously measured and recorded within a data logger. In addition, physical activity levels of a person we

Portable air sampling systems and methods are provided for intermittently sampling air in the breathing zone of a person over extended periods of time. Air sampling system performance can be continuously measured and recorded within a data logger. In addition, physical activity levels of a person wearing a portable air sampling system can be continuously monitored and recorded within the data logger. Air sampling system performance monitoring includes measuring pressure drop across a filter and measuring temperature of air flowing through the filter. Physical activity levels of a person can be monitored easily and non-intrusively by measuring changes in electrical capacitance of a transducer maintained in close proximity to the person.

대표청구항 ▼

[ That which is claimed is:] [1.] A portable air sampling system for sampling air from a breathing zone of a creature, comprising:a filter device, comprising:a housing including an air inlet in communication with the breathing zone, and an air outlet; anda filter element disposed within the housing

[ That which is claimed is:] [1.] A portable air sampling system for sampling air from a breathing zone of a creature, comprising:a filter device, comprising:a housing including an air inlet in communication with the breathing zone, and an air outlet; anda filter element disposed within the housing that is configured to retain particles entrained within air flowing therethrough;a pump in fluid communication with the filter device air outlet, wherein the pump is configured to draw a predetermined volume of air into the filter device and through the filter element;means for intermittently activating the pump to draw the predetermined volume of air through the filter element at predetermined intervals;means for monitoring performance of the air sampling system; andmeans for monitoring physical activity of the creature, comprising:a transducer configured to change electrical capacitance in response to physical activity of the creature; anda data logger that records changes in electrical capacitance of the transducer.