Acoustical system and method for simultaneously locating and tracking multiple personnel in rooms of a building
US6292106A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1998 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Oct 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/0036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radio frequency (RF) sync pulse is transmitted throughout a building having a plurality of rooms to be traversed by a plurality of players during, for example, an assault training exercise. Ultra-sound pulses are transmitted from fixed piezoelectric transducers mounted at each corner of each room. The ultra-sound pulses with encoded room identity information are generated in a predetermined timed sequence by different ultra-sound transducers after each RF sync pulse. Each player carries an RF receiver for receiving the RF sync pulses. Each player also carries multiple microphones for receiving the ultra-sound pulses transmitted in a room in which the player is currently located. Timing circuitry carried by each player generates signals representative of the delays between each RF sync pulse and the receipt of each of the ultra-sound pulses sequentially received thereafter. Each player carries an RF transmitter for transmitting an RF tracking signal representing an identity of the room an identity of the player and the respective delays that each ultra-sound pulse is received after each RF sync pulse. A control facility receives all of the RF tracking signals from all of the playe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.