Research Highlight Details

Safe Home for Lone Elderly People


  • Monitoring the regular activities using sensor nodes (no camera included) at important locations.
  • Assessment of abnormal behavior by interpreting the information of the sensor nodes using an intelligent controller.
  • Communicating the message to the mobile phones of caretakers.
  • Power saving algorithms incorporated to minimize the energy consumption.
  • CCU in Room & Message in Mobile
  • Motion sensor installed in drawing room & Motion sensor installed in front of wash room
  • Current sensor connected to TV set & Current sensor connected to toaster
  • Features

  • Non-invasive and does not use any camera
  • Sensor nodes are light weight, portable and easy to install
  • Low power consumption to avoid electrical loading
  • Automatic refreshing of memory after 16th day of installation for continuous use
  • Emergency situation is assessed and message sent to the caretaker through mobile phone.
  • The user does not have to keep track of the operation of the instrument. Health status of the sensor nodes and the central controller is checked at regular intervals and message sent to themaintenance person if required.
  • Device

  • Packaged wireless sensor nodes to be fixed in the house
  • A central receiver to be fixed in the house
  • The sensor nodes can be removed when required
  • Connection of the central receiver through mobile network to the mobile of the caretaker/s.
  • Hardware

  • PIR motion sensors
  • Current Transformers
  • Central controller unit with LCD interface
  • ATMEGA 328 microcontroller
  • ZigBee wireless transmission, 2.4GHz
  • Software

  • Behaviour prediction algorithm in central controller
  • Inactivity period prediction for each sensor nodes
  • Status checking algorithm in each sensor node