US 2019/0195769 A1 · NETWORK ASSISTED PARTICULATE MATTER SENSOR

Abstract

Apparatus and associated methods relate to a particulate matter (PM) sensor assembly receiving a PM count value from an optical pulse counting sensor and selectively calibrating the sensor characteristics in response to recent published high-accuracy air-quality information within a local region that contains the sensor assembly. In an illustrative example, the air-quality information may be generated by various PM monitoring stations and published in data streams or collections, for example. The sensor assembly may select, for example, a specific regional PM mass density reference value from the received air-quality information associated with location information of the sensor assembly. Based on the published air-quality information, the sensor assembly may select a calibration curve from, for example, a set of predetermined calibration curves. A mobile low-cost PM sensor assembly, may advantageously leverage high-cost published PM air-quality information to dynamically improve accuracy in local PM measurement.

Claims20

Dependent claims

An apparatus to estimate a measure of an amount of a substance mixed in a gaseous fluid, the apparatus comprising:

a particulate matter (PM) sensor adapted to sample ambient air and to generate a local measurement data signal in response to measurement of the sampled ambient air;
a processor operatively coupled to the PM sensor to receive the local measurement data signal;
a first data store operatively coupled to the processor and containing a plurality of predetermined calibrations, each of the plurality of predetermined calibrations defining a calibration function to substantially compensate for differences between particulate matter used during an initial calibration and particulate matter of the ambient air being sampled by the PM sensor;
a receiving module operatively coupled to the processor and configured to receive reference information specific to a geographic region that contains the PM sensor;
and,
a second data store operatively coupled to the processor and containing a program of instructions that, when executed by the processor, cause the processor to perform operations to automatically select a specific calibration in the plurality of predetermined calibrations based on the received reference information.

3 more elements

Dependencies are inferred from the claim text.

Network assisted particulate matter sensor

Life of this patent

Network assisted particulate matter sensor

Life of this patent

Abstract

Claims20