Personnel monitoring man-down alarm and location system
US5045839A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1990 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Mar 8, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/016
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A personnel activity sensor and alarm system is provided which incorporates one or more remote personnel safety units each incorporating a multi-axis motion detector and reset timing and logic circuit coupled with a radio transmitter or transceiver. Under the command of the logic circuit, the radio automatically transmits an alarm signal and causes the circuitry to generate a local audio signal in the event of personnel inactivity for a predetermined period of time. This enables personnel assistance to be initiated without delay. A base station is also provided which incorporates a radio transceiver to which is coupled control logic circuitry for commanding transmission of radio integration and control signals to the radio receiver of the remote personnel units for acknowledgment of alert signal reception and for cancellation of the radio alarm signal to clear the radio channel for other activities. A computer and computer interface is also provided for computerized control of the entire system as well as for compiling data, monitoring personnel location, etc. This system is designed for use on conventional radio systems which may include relay of alarm signal through fixed or mobi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.