Patent ID: 11867619
Assignee: PROJECT CANARY, PBC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An identification method for identifying a target chemical at a site, the identification method comprising:
providing a sampling inlet to:
capture a sample of air from an atmosphere surrounding the site;

providing a compound sensor, comprising:
a sample cell to receive the sample of air from the sampling inlet;
a light source adjoined to the sample cell to emit a beam of light,
wherein the beam of light passes through the sample cell; and

a spectrophotometer adjoined to the sample cell;

generating a first transmission spectrum of the beam of light with the spectrophotometer;
transmitting a sample of air for interacting with the beam of light in the sample cell;
generating a second transmission spectrum of the beam of light in response to interacting the sample of air with the beam of light with the spectrophotometer;
processing the second transmission spectrum by:
denoising and de-biasing the second transmission spectrum to generate a processed second transmission spectrum;

generating an absorption spectrum of the beam of light by calculating absorbance of the beam of light by the sample of air based on:
comparing the first transmission spectrum to the processed second transmission spectrum; and

identifying the target chemical by decomposing the absorption spectrum to extract an absorption spectra related to the target chemical.