The lower-left frame shows the structure of a steel mill and a controller for playback of the recorded data. The lower-middle frame shows recorded camera video data. The lower-right frame shows alarm data. To synchronize the video data and the sensor data, users click video and sensor data with the right mouse button, and play button of the controller. The system play back the specified video and sensor data in synchronization.
Users can refer to both the sensor data and the video data simultaneously.
Then the data related to WorkRoll appears in the sensor data frame. We demonstrated this prototype system to people of the steel works. They told us the above techniques allowed them to understand the exact situation of the system. We propose new techniques for the synchronization and retrieval of recorded multimedia data for supervisory control systems, and test usability, and come to the following conclusions. The technique for synchronization enables users to see multiple recorded data simultaneously.