# US 2019/0317019 A1 · Designs of accurate pm sensors and systems for laboratory & real time calibration / data inversion > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0317019 A1 - Document ID: US20190317019A1 - Status: Published application - Kind: A1 - Application number: 16/383,385 - Filed: 2019-04-12 - Published: 2019-10-17 - Earliest claimed: 2018-04-13 - Assignees: Washington University - Applicants: Washington University - Inventors: Pratim Biswas; Jiayu Li - Web page: https://patentgrep.com/patent/US20190317019A1 ## CPC - G01N 15/06: Investigating concentration of particle suspensions (by weighing G01N5/00; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10) - G01N 21/532: {with measurement of scattering and transmission} - G01N 1/2202: {involving separation of sample components during sampling} - G01N 21/274: {Calibration, base line adjustment, drift correction} - G01N 15/075: by optical means - G01N 2001/2223: {aerosol sampling devices} - G01N 2015/0046: {in gas, e.g. smoke} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract A sensor analysis computer device for analyzing particulate matter is provided. The computer device includes at least one memory and at least one processor in communication with the at least one memory. The computer device is in communication with a sensor configured to measure particulate matter. The at least one processor is programmed to store a plurality of parameter data for the sensor including a calibration factor, receive a plurality of sensor data from the sensor, determine a present calibration factor based on the plurality of parameter data and the plurality of sensor data, determine an updated calibration factor for the sensor based on the present calibration factor and the plurality of parameter data, and transmit the updated calibration factor to the sensor, wherein the sensor is configured to adjust subsequent sensor data based on the updated calibration factor. ## Claims ### Claim 1 A sensor analysis computer device for analyzing particulate matter comprising: at least one memory; and at least one processor in communication with the at least one memory, and further in communication with a sensor configured to measure particulate matter, the at least one processor programmed to: store a plurality of parameter data for the sensor including a calibration factor; receive a plurality of sensor data from the sensor; determine a present calibration factor based on the plurality of parameter data and the plurality of sensor data; determine an updated calibration factor for the sensor based on the present calibration factor and the plurality of parameter data; and transmit the updated calibration factor to the sensor, wherein the sensor is configured to adjust subsequent sensor data based on the updated calibration factor. ### Claim 2 (depends on 1) The computer device of claim 1, wherein the at least one processor is further programmed to determine the calibration factor based, at least in part, on experimental testing of the sensor. ### Claim 3 (depends on 1) The computer device of claim 1, wherein the at least one processor is further programmed to generate the calibration factor based, at least in part, on signal output of the sensor detecting zero particles. ### Claim 4 (depends on 1) The computer device of claim 1, wherein the plurality of parameter data includes structural data associated with the sensor. ### Claim 5 (depends on 1) The computer device of claim 1, wherein the sensor includes a photo resistor and an infrared emitting diode. ### Claim 6 (depends on 1) The computer device of claim 1, wherein the sensor includes a plurality of lasers, wherein the lasers are configured to each provide different scattering signals of a detected particle. ### Claim 7 (depends on 1) The computer device of claim 1, wherein the at least one processor is further programmed to receive sensor data from a high-resolution sensor and use the sensor data from the high-resolution sensor to calculate the calibration factor. ### Claim 8 (depends on 1) The computer device of claim 1, wherein the at least one processor is further programmed to periodically determine the updated calibration factor based on subsequent sensor data from the sensor. ### Claim 9 (depends on 1) The computer device of claim 1, wherein the at least one processor is further programmed to: receive a sensor signal from the sensor; and apply the updated correlation factor to the received sensor signal to determine an adjusted sensor signal. ### Claim 10 A system for analyzing particulate matter comprising: a plurality of sensors configured to measure particulate matter; and a sensor analysis computer device in communication with the plurality of sensors comprising at least one memory and at least one processor in communication with the at least one memory, the at least one processor programmed to: store a plurality of parameter data for the plurality of sensors including a calibration factor for each sensor of the plurality of sensor; receive a plurality of sensor data from the plurality of sensors; determine a plurality of correlations between the plurality of sensors based on the plurality of sensor data; and update at least one of the plurality of calibration factors based on the plurality of correlations. ### Claim 11 (depends on 10) The system of claim 10, wherein the sensor analysis computer device is further programmed to transmit the at least one updated calibration factor to the corresponding sensor, wherein the corresponding sensor is configured to adjust subsequent sensor output based on the updated calibration factor. ### Claim 12 (depends on 10) The system of claim 10, wherein the sensor analysis computer device is further programmed to: receive a sensor signal from each sensor of the plurality of sensors; and apply the corresponding calibration factor to the received sensor signal to determine an adjusted sensor signal for each of the plurality of sensor signals from the plurality of sensors. ### Claim 13 (depends on 10) The system of claim 10, wherein the plurality of sensors are each the same type of sensor. ### Claim 14 (depends on 10) The system of claim 10, wherein the sensor analysis computer device is further programmed to receive the sensor data wirelessly from each of the plurality of sensors. ### Claim 15 (depends on 10) The system of claim 10, wherein the plurality of sensors are low-cost sensors. ### Claim 16 (depends on 10) The system of claim 10, wherein the sensor analysis computer device is further programmed to receive sensor data from a high-resolution sensor and use the sensor data from the high-resolution sensor to calculate the calibration factor. ### Claim 17 (depends on 10) The system of claim 10, wherein the sensor analysis computer device is further programmed to generate a spatial temporal map of the particulate matter in an area define by the plurality of sensors. ### Claim 18 (depends on 10) The system of claim 10, wherein the sensor analysis computer device is further programmed to periodically determine updated calibration factors for the plurality of sensors based on subsequent sensor data from the corresponding sensors. ### Claim 19 (depends on 10) The system of claim 10, wherein at least one sensor of the plurality of sensors includes a photo resistor and an infrared emitting diode. ### Claim 20 (depends on 10) The system of claim 10, wherein at least one sensor of the plurality of sensors includes a plurality of lasers, wherein the lasers are configured to each provide different scattering signals of a detected particle.