US Patent 10928295 Network assisted particulate matter sensor

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.