Calibration method for distributed sensor system

摘要

Methods of calibrating sensors in a distributed sensor system including a set of spatially distributed base units in communication with a central server over a data network include using a reference sensor, using a reference base unit, using crowd-sourced calibration, using sensor data collected in the same base unit, using sensor cross-sensitivity, or using sensor data from known environmental conditions.

主权项

1. A method of calibrating sensors in a distributed sensor system comprising a plurality of spatially distributed base units in communication with a central server over a data network, each base unit comprising one or more sensors configured to measure an air quality parameter, the method comprising:
maintaining on the central server calibration data for sensors in the distributed sensor system in a calibration data database, the calibration data for a sensor being associated with a sensor identifier uniquely identifying the sensor in a base unit and a board identifier uniquely identifying the base unit in the system; receiving at the central server a reference sensor measurement from a reference sensor associated with a first base unit; identifying at the central server the reference sensor measurement by a sensor identifier uniquely identifying the reference sensor associated with the first base unit and a board identifier uniquely identifying the first base unit; receiving at the central server a test sensor measurement from a first sensor under test; identifying at the central server the test sensor measurement by a sensor identifier uniquely identifying the first sensor and a board identifier uniquely identifying a base unit in which the first sensor is installed; determining at the central server calibration data values for the first sensor under test using the reference sensor measurement and the test sensor measurement; and storing in the calibration data database on the central server updated calibration data values for the first sensor under test.