US 12,345,433 B2
Indoor air quality sensor calibration systems and methods
Hung M. Pham, Dayton, OH (US); Stuart K. Morgan, West Chester, OH (US); and Brian R. Butler, Centerville, OH (US)
Assigned to Copeland LP, Sidney, OH (US)
Filed by COPELAND LP, Sidney, OH (US)
Filed on Apr. 18, 2024, as Appl. No. 18/639,935.
Application 18/639,935 is a continuation of application No. 17/048,967, granted, now 11,994,313, previously published as PCT/US2019/028405, filed on Apr. 19, 2019.
Claims priority of provisional application 62/660,380, filed on Apr. 20, 2018.
Claims priority of provisional application 62/660,382, filed on Apr. 20, 2018.
Claims priority of provisional application 62/660,385, filed on Apr. 20, 2018.
Prior Publication US 2024/0310068 A1, Sep. 19, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F24F 11/64 (2018.01); F24F 11/52 (2018.01); F24F 110/10 (2018.01); F24F 110/64 (2018.01); F24F 110/66 (2018.01); F24F 110/70 (2018.01)
CPC F24F 11/64 (2018.01) [F24F 11/52 (2018.01); F24F 2110/10 (2018.01); F24F 2110/64 (2018.01); F24F 2110/66 (2018.01); F24F 2110/70 (2018.01)] 20 Claims
OG exemplary drawing
 
1. An indoor air quality (IAQ) system for a building, comprising:
an IAQ sensor module comprising a sensor configured to measure an amount of an item in air at the IAQ sensor module, wherein the item is one of particulate matter, volatile organic compounds (VOC), and carbon dioxide;
a minimum module configured to selectively store the amount of the item as a minimum value of the amount in instances when a mitigation device has been on for at least a predetermined period,
wherein the mitigation device is configured to decrease the amount of the item in the air when the mitigation device is on;
a storing module configured to selectively store the minimum value as an initial minimum value at a first instance of storing the amount as the minimum value;
an offset module configured to determine a drift offset for the sensor based on a difference between the minimum value and the initial minimum value; and
an adjustment module configured to determine an adjusted amount of the item in the air at the IAQ sensor module based on the amount and the drift offset.