| 摘要 |
The method involves automatically modifying duration of inactivity between a day and night by bias of photoelectric or photo resistant cell. Message is sent by a telephonic transmitter through a line i.e. telephonic jack, during prolonged inactivity. Movement of person is recorded by a radio transmission infra-red detector (1). A person of a family or friend or a neighbor is called through the telephone jack by triggering a central unit (2) for providing hands free dialog between the isolated person and a called person to call assistance. |
