Makoto Katsukura

A Long-term Data Collection System for Life Pattern Sensor

Abstract This paper describes a long-term filed data collection system from a person living house required for designing a life pattern sensor. The life pattern sensor is an activity recognition sensor both for measuring electric power consumption and detecting use of electronic devices by utilizing high-frequency electrical current waveform as a signature of each device. A prototype of the life pattern sensor has been developed and evaluated in five homes. The results show the life pattern sensor measured power consumption within 1% error and identified uses of devices with over 95% accuracy. The capability of the sensor is enough for realizing home energy management system. The long-term data collection system is constructed so as to collect annotated field data for sophisticating the sensor in practical level. In this paper, the overview of the data collecting system and discussion about the following questions based on the field data: 1. Can current waveform be in stable at any conditions in a house? 2. Can sequence of electronic devices describe residents’ real life pattern? 3. Can residents manage energy efficiently by knowing their own life pattern?

Performance of the pipe-base d transmission system in the real field

We have developed a new pipe-based transmission system, which utilizes a pair of refrigerant pipes of the air conditioner. Field examination of the pipe-based transmission system on the pipeline of existing air-conditioning equipments in a building has been completed. In this paper describes the field test results, such as bit error ratio and physical transmission rates and radiated electric field at the out side of the building. We have confirmed the pipe-based transmission system has practical reliability for the control system through the field test.