Mobile Measurement System of Ozone Concentration in Urban Areas

Ozone concentration significantly affects life quality of the people in an area. Ozone concentration that exceeds certain thresholds in heavily populated areas like most cities may be harmful for health and can even cause death. However, ozone monitoring has only so far been carried out at fixed sampling points using stationary instruments or conducted with manual recording instruments at certain sampling points. These types of measurements cannot represent the whole suburban areas that tend to be wide and populous. This paper proposes a mobile model of measuring ozone concentration with the integration of ozone sensors and Global Positioning System (GPS) sensor circuit. Measured data are acquired by the microprocessor, saved in a data base and analysis results are linked to a web mapping service. Measurements are carried out by encircling the intended urban areas. Results show that data from ozone sensors and measurement coordinates (latitude and longitude) can be stored in the data base and can visually be observed on the web mapping service in the form of spatial distribution of measurement points. Quantities of ozone concentration measurement results for a wide area can be seen on the data base. The system developed here is capable of monitoring environmental condition by acquiring ozone concentration distribution values.