METHOD AND APPARATUS FOR DETECTING PARTICULATE MATTER

摘要

Various methods and apparatuses for detecting particulate matter are described herein. An illustrative apparatus may include a diode laser positioned adjacent to a first end of an optical cavity having a length. The diode laser may be configured to direct a light beam in a direction towards a second end of the optical cavity. A plurality of detectors may be positioned along the length of the optical cavity in the direction of the light beam. Each detector may be configured to measure a portion of the light beam that is scattered substantially perpendicular to the direction. The apparatus may also include a computing device that is configured to receive data from each of the plurality of detectors and a data transmitting device that is configured to transmit the data to a portable electronic device. The data may correspond to an amount of measured scattered light.

主权项

1. A particulate matter sensor comprising:
an optical cavity having a length; a diode laser positioned at or near a first end of the optical cavity, wherein the diode laser is configured to direct a light beam in a direction towards a second end of the optical cavity; a plurality of detectors positioned along the length of the optical cavity, wherein each of the plurality of detectors is configured to measure a portion of the light beam that is scattered substantially perpendicular to the direction; a computing device that is configured to receive data from each of the plurality of detectors, wherein the data corresponds to an amount of measured scattered light; and a data transmitting device configured to transmit the data to a portable electronic device.