CA2022794A1 - Infrared personnel locator system - Google Patents

Infrared personnel locator system

Info

Publication number
CA2022794A1
CA2022794A1 CA2022794A CA2022794A CA2022794A1 CA 2022794 A1 CA2022794 A1 CA 2022794A1 CA 2022794 A CA2022794 A CA 2022794A CA 2022794 A CA2022794 A CA 2022794A CA 2022794 A1 CA2022794 A1 CA 2022794A1
Authority
CA
Canada
Prior art keywords
pulse trains
classes
personnel
during
members
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2022794A
Other languages
French (fr)
Other versions
CA2022794C (en
Inventor
Barnie L. Guest
Leslie C. Laney
Dennis K. Fredrickson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dwyer Precision Products Inc
Original Assignee
Barnie L. Guest
Leslie C. Laney
Dennis K. Fredrickson
Westside Communications Of Jacksonville Inc.
Wescom, Inc.
Dwyer Precision Products Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Barnie L. Guest, Leslie C. Laney, Dennis K. Fredrickson, Westside Communications Of Jacksonville Inc., Wescom, Inc., Dwyer Precision Products Inc. filed Critical Barnie L. Guest
Publication of CA2022794A1 publication Critical patent/CA2022794A1/en
Application granted granted Critical
Publication of CA2022794C publication Critical patent/CA2022794C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • G08B3/1016—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B3/1083—Pager locating systems

Abstract

A personnel locator system for monitoring the locations of classes of personnel. Members of classes of personnel carry portable, infrared transmitters which transmit pulse trains during discrete burst periods. Transmitters carried by members of different classes of personnel transmit pulse trains of different, predetermined frequencies to identify the classes, and transmit the pulse trains during distinct burst periods to prevent phase synchronization between pulse trains transmitted by the different transmitters.
Infrared receivers are positioned to receive the transmitted pulse trains in order to monitor the continued presence locations of the members of the classes of personnel. The system utilizes pulse trains having pulses of short pulse widths during a relatively long time period in order to allow increased battery life while transmitting at high energy levels to saturate the area of reception. The pulses are of less than 40 microseconds during a 55 millisecond time frame.
CA002022794A 1989-08-07 1990-08-07 Infrared personnel locator system Expired - Lifetime CA2022794C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US396,895 1989-08-07
US07/396,895 US4990892A (en) 1989-08-07 1989-08-07 Personnel locator system

Publications (2)

Publication Number Publication Date
CA2022794A1 true CA2022794A1 (en) 1991-02-08
CA2022794C CA2022794C (en) 2000-11-21

Family

ID=23569038

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002022794A Expired - Lifetime CA2022794C (en) 1989-08-07 1990-08-07 Infrared personnel locator system

Country Status (3)

Country Link
US (1) US4990892A (en)
AU (1) AU622384B2 (en)
CA (1) CA2022794C (en)

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Also Published As

Publication number Publication date
AU622384B2 (en) 1992-04-02
CA2022794C (en) 2000-11-21
US4990892A (en) 1991-02-05
AU6027590A (en) 1991-02-07

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