US 12,265,007 B2
Air measurement device
David Hagan, Cambridge, MA (US); and Eben Cross, Melrose, MA (US)
Assigned to QuantAQ, Inc.
Filed by QuantAQ, Inc., Somerville, MA (US)
Filed on Oct. 6, 2021, as Appl. No. 17/495,766.
Claims priority of provisional application 63/088,000, filed on Oct. 6, 2020.
Prior Publication US 2022/0107259 A1, Apr. 7, 2022
Int. Cl. G01N 15/0205 (2024.01); G01N 15/10 (2024.01)
CPC G01N 15/0211 (2013.01) [G01N 2015/1024 (2024.01)] 25 Claims
OG exemplary drawing
 
1. A device for measuring particles in air, the device comprising:
a first sensor, comprising a first optical detector, configured to measure the particles in the air as an ensemble using a light beam directed toward the ensemble of particles, the first sensor determining a first data set comprising a total integrated scattered light signal given by the ensemble of particles in the air, the total integrated scattered light signal detected by the first optical detector positioned at a scattering angle, the scattering angle being between about 5 degrees and about 175 degrees;
a second sensor, comprising a second optical detector, configured to produce a light path through which individual particles in the air pass, the second sensor configured to determine a second data set comprising a number and a particle size of the individual particles by correlating an intensity of light scattered by the individual particles to the size of the individual particles, the particle size of the individual particle being proportional to the intensity of the scattered light detected by the second optical detector; and
a processor configured to execute a modeling tool, the processor being operatively coupled with the first and second sensors, the modeling tool configured to determine a total mass loading of particles in the air at specific size breakdowns, wherein the determination is based on the total integrated scattered light signal and the number and size of individual particles;
a memory device operatively coupled with the modeling tool, the total mass loading of particles in the air at specific size breakdowns is-stored in the memory device.