{"id":1956,"date":"2021-01-29T15:19:35","date_gmt":"2021-01-29T15:19:35","guid":{"rendered":"https:\/\/sci-monitoring-cn.com\/?p=1956"},"modified":"2021-11-10T19:04:13","modified_gmt":"2021-11-10T19:04:13","slug":"portland-wild-fires-our-sensor-solution","status":"publish","type":"post","link":"https:\/\/sci-monitoring-cn.com\/portland-wild-fires-our-sensor-solution\/","title":{"rendered":"Portland Wild Fires – Our Sensor Solution"},"content":{"rendered":"
Fostered by advances in IoT technology, Sailbri Cooper\u2019s SCI-608 air quality sensor network monitor uses machine learning algorithms, which are fully deployable on a cloud platform, to conduct in-situ<\/em> calibration of the data. Our algorithms and calibration systems have been proven to be reliable during high pollution episodes. The periodic wildfire episodes in the West Coast during recent years have been threatening the ambient air quality complement to traditional spatially dispersed air-quality networks, which measure high spatiotemporal variations of air pollutants. In situ air pollution monitoring, data can inform the public about the ambient air pollutant concentrations in a timely manner when a wildfire occurs, so that people or local government can quickly react with safety measures to reduce individual personal exposure. <\/p> During a wildfire episode, the PM and CO concentrations can reach more than 100 times of normal concentrations. Such high-pollution concentrations impose additional challenges in the low-cost monitoring field, especially when the low-cost sensors are typically calibrated at normal concentration levels. The SCI-608 air quality sensor network monitor uses machine learning algorithms, which are fully deployable on a cloud platform, to conduct in-situ calibration of the data. The sensor node\u2019s algorithms and calibration systems have been proven to be reliable during high pollution episodes. Since August 2nd, 2018, two SCI-608 have been co-located alongside a research reference level nephelometer (Radiance Research M903, light scattering principle) at the SE Lafayette in Portland, Oregon (AQS ID: 41-051-0080). After the first and public health. Our sensor product is an important week of installation, the two sensors experienced periodic episodes of poor air quality due to wildfires indicated by significant increased PM2.5 and CO concentrations. The SCI-608\u2019s machine learning algorithm uses historical data to optimize the prediction model and calibrates the data. Figure 1. demonstrates the hourly averaged nephelometer and SCI-608 PM2.5 concentration readings during the wildfire season of 2018, in which two wildfire episodes were observed amid 08\/14\/2018 and 08\/22\/2018. The two SCI-608 sensors did not accurately capture the high PM2.5 concentrations during the first wildfire event (over 20% difference between the sensors and the reference method). The difference between the reference measurement and the sensors triggered an automatic in situ calibration of the SCI-608. The linearities after each in-situ calibration are shown by the subplots on the right side of Figure 1. The improvement after each calibration can be clearly observed (as indicated by the increasing R squared). After being calibrated with the data from the first wildfire case, two SCI-608 sensors’ performance was significantly improved in the second wildfire event.<\/p>