Patent ID: 9141094
Filing Date: 2015-09-22
Classification: G05B

Abstract:
1. A personal particle counter comprising: at least one airstream management module for moving air through at least one chamber; at least one light source, which is focused into a beam, that passes through the at least one chamber; at least one photo-detector within the at least one chamber that captures light scattered by airborne particulates passing through the beam; at least one amplifier in communication with the at least one photo-detector, the at least one amplifier converts signals from the at least one photo-detector into amplified electrical pulses; at least one threshold comparator that processes the amplified electrical pulses from the at least one amplifier and produces at least one output based on any pulse above a threshold, the threshold represents at least one particulate size channel; at least one microcontroller that processes the output from the at least one threshold comparator related to the at least one particulate size channel to count particles that pass through the chamber, where volume of air and light intensity are used in conjunction with the particles counted to infer particulate concentration for the at least one particulate size channel; and at least one interface in communication with the at least one microcontroller to perform, at least one of, store and communicate the collected information.