C Sensing. Filtering and Storing of Explosion related accelerommener Data
As mentioned earlier in Section II-B. each phone executed an app that enabled the phone sense ground vibrations continuously. but retain and store only those accelerometer readings corresponding to an explosion. while filtering out the rest. As soon as the app generates the correct readings related to an explosion event from the accelerometer sensor. it tags the values with the time-stamp information and subsequently writes each time-stamp tagged sample as a record to a Comma Separated Value csv) file. The output file is stored in the SD card of the smartphone device in the form of raw data. After the blasts were completed. the team assembled subsequently collected