Abstract
Daily human behavior in an indoor environment is identified, and activities are defined using outputs from four kinds of tin oxide gas sensors installed in the living room of a house. The beginning and end of indoor human activities and the ignition of an oil heater in the monitoring room can be recognized by analyzing the output patterns of the sensors. A frequency analyzing method is useful to recognize human behavior clearly. The sensor's output patterns while a person sleeps are also changed by the attributes of the subjects. The patterns fluctuate frequently for a young person but show no variation for an aged individual. A person generates some gases while sleeping; these gases have an effect upon the sensor output.
| Original language | English |
|---|---|
| Pages (from-to) | 25-34 |
| Number of pages | 10 |
| Journal | Sensors and Materials |
| Volume | 12 |
| Issue number | 1 |
| Publication status | Published - 2000 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Instrumentation
- Materials Science(all)