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Personnel location system

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US3439320A
US3439320A US3439320DA US3439320A US 3439320 A US3439320 A US 3439320A US 3439320D A US3439320D A US 3439320DA US 3439320 A US3439320 A US 3439320A
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Prior art keywords
signal
relay
room
coil
display
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James E Ward
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Relton Corp
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Relton Corp
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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00Audible signalling systems; Audible personal calling systems
    • G08B3/10Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008Personal calling arrangements or devices, i.e. paging systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00Communications, electrical: acoustic wave systems and devices
    • Y10S367/91Portable sonar devices

Description

April 15;1969

J. E. WARD PERSONNEL LOCATION SYSTEM Filed Sept. 21, 1967 l VVENTOR.

3,439,320 PERSONNEL LOCATION SYSTEM llames E. Ward, Glendora, Calif., assignor to Relton Corporation, Arcadia, Calif., a corporation of California Filed Sept. 21, 1967, Ser. No. 669,610 lnt. Cl. G01s 3/80 US. Cl. 340-16 7 Claims ABSTRACT OF THE DISCLOSURE of the location of this person at a designated area. Preferably, the indication is maintained until the person moves to a different area and actuates his transmitter there.

Background of the invention This invention relates to communication between a plurality of persons and a central point and, more particularly, to an indication system for locating personnel at a large facility.

At large business establishments, hospitals, construction sites, and other extended areas of activity, provision must be made for communicating with personnel that move about the area in the course of their work. Most known systems for accomplishing this type of communication have disadvantages of one sort or another that must be taken into consideration and weighed when selection of a particular system is made. For the most part, the person sought is paged in one way or another.

Probably the most commonly employed paging system is a public address network in which the name of the person sought is .announced over loudspeakers distributed throughout the entire facility. Communication in this type of system is not selective, i.e., the pages are heard by everyone within the facility regardless of whether or not a person is affected by the announcement being made. Continual paging over such a public address network often disturbs the personnel and therefore reduces the efficiency of their activities.

Other paging systems are selective and therefore do not disturb personnel who are not concerned with the page. These systems employ one or more radio frequency transmitters distributed throughout the facility. The transmitters are capable of producing one of a plurality of different frequencies. Each person to be paged has in his possession a radio receiver tuned to a unique one of these frequencies. To communicate with a person, his unique frequency is broadcast by all the transmitters, thereby producing only in his receiver an audible indication that can be heard by him. This type of system requires a portable source of electrical energy in each receiver on which a current drain is continually imposed as long as the receiver is in a stand-by condition. When the energy source is expended, it must be replaced or recharged in order to maintain its operation.

on the concept that personnel are located in response to signals sent out by them each time they move to a different nited States Patent O designated area at a facility. Specifically, each person has in his possession a transmitter capable of producing a locating signal having a unique frequency. Each area or room at the facility to be designated is provided with a transducer or receiver capable of sensing all the unique frequencies assigned to the personnel. The transducers are all coupled to a centrally located display panel capable of indicating the designated area in which each person is located. When a person actuates his transmitter, thereby sending a locating signal to the transducer in the area or room in which he is located, control circuitry determines which unique frequency is being received at the central location and which transducer is sensing this unique frequency. An indication of the location of the person sending the signal at one of the designated areas is then produced on the display panel responsive to the control circuitry. Most advantageously, this indication is maintained on the display panel until the person sends out a signal from his transmitter in a diiferent designated area, at which time a new indication replaces the original one.

Preferably, the locating signals are produced by ultrasonic sound transmitters. In such case, the system produces no audible sounds that may disturb other personnel, and no portable sources of electrical energy are required for the units in the possession of the person to be located. The energy for actuating the ultrasonic transmitter could be provided by the person operating the transmitter in the form of a hammer blow on an ultrasonic resonant tuning fork or the like.

Brief description of the drawing The features of a specic embodiment of the invention are illustrated in the drawing, in which:

FIG. 1 is a schematic diagram in block form of a communication system incorporating the principles of the invention; and

FIG. 2 is a circuit schematic diagram of a portion of the display panel control circuitry of FIG. 1.

Description of a specific embodiment In connection with FIG. l, a personnel location system is described that indicates the location of ve persons designated JIM, MAX, BUD, JOE, and BILL at one of three areas of a facility designated ROOM 1, ROOM 2, and ROOM 3. Each person is provided with a transmitter capable of producing an ultrasonic sound signal having a unique frequency. The ultrasonic frequencies are designated f1, f2, f3, f4, and f5. Preferably, the ultrasonic transmitters are of the type that produce ultrasonic signals in response to a hammer blow so that no portable source of electrical energy is required in the transmitters. Such ultrasonic transmitters are in common use to control remotely commercial television receiver sets in the home. Instead, a portable power source could be used to give a constant signal or a selectively intermittent signal. The areas encompassed by ROOM 1, ROOM 2, and ROOM 3 are represented schematically in FIG. 1 by blocks 10, 11, and 12, respectively. Ultrasonic transducers or receivers 13, 14, and 15, which each have a band width sufficiently wide to sense all of the frequencies f1 through f5, are provided in ROOM 1, ROOM 2, and ROOM 3, respectively. Transducers 13, 14, and 15, which convert ultrasonic sound energy to electrical energy, are coupled through ampliers 16, 17, and 18, respectively, to centrally located display panel control circuitry 19. A display panel 20 in the form of a grid with rows and columns of indicators, such as lamps, is also provided at the centrally located point. Each indicator on display panel 20 is situated in a square area of the grid. One horizontal row of indicators is provided for each room to be designated,

and one vertical column of indicators is provided for each person to be identified.

When a person enters a room, he actuates his transmitter, thereby sending an ultrasonic signal to display panel control circuitry 19. This is illustrated in FIG. 1 by an ultrasonic transmitter 21 in ROOM 1 that produces an ultrasonic sound signal at frequency f1 assigned to JIM. The ultrasonic sound signal is represented at 22. Display panel control circuitry 19 senses which one or more of the frequencies f1 through f5 is being sent and which transducer is receiving this frequency. On the basis of this information, the location of the person involved at a designated area is determined and indicated on display panel 20 responsive to control circuitry 19. Following the assumption that transmitter 21 is actuated in ROOM 1, a lamp is lit in the upper left-hand square on display panel 20, designated 23. The lamp remains lit in square 23 until transmitter 21 is actuated in a different room, at which time a new indication replaces the indication in square 23. The central operator can then inform interested people as to JIMs precise whereabouts or can communicate directly with him without disturbing anyone other than the occupants of his room.

In FIG. 2, a schematic circuit diagram of that portion of display panel control circuitry 19 associated with ROOM 1 is shown. The same circuitry would be repeated for ROOM 2 and ROOM 3. Lamps corresponding to each of the ve squares in the row for ROOM 1 are energized under the control of relays. The control coil of each relay is designated by a capital letter, and its contacts are designated by small letters corresponding to the capital letters with different subscripts Where plural contacts are involved. In accordance with well-accepted practice, normally open contacts are designated by a cross and normally closed contacts are designated by a slash. Relay coils A, B, and C are labeled SR and SO to designate that they are slow operating and slow releasing relays. The remaining relays are assumed to operate and release instantaneously. Three out of the five indicator lamps for ROOM 1, designated 30, 31, and 32, and the associated control circuitry are shown in FIG. 2. Identical circuitry would be employed for the other lamps associated with ROOM 1. The output of amplifier 16 (FIG. 1) is connected through a filter 33 to relay coil A, through filter 34 to relay coil B, and through filter 35 to relay coil C. Filters 33, 34, and 35 are selective filters having narrow bands that will pass only the frequency assigned to the person identified by the corresponding column of display panel 20, namely frequencies f1, f2, and f5, respectively. On the application of a signal at frequency f1, relay coil D operates immediately to complete a circuit through contact d to relay coil X. As described in detail below, the operation of relay coil X serves to deenergize any other lamps in the column of display panel 20 identifying JIMs location. After a short delay, relay coil A operates. Consequently, contact a3 opens to interrupt the energizing circuit for relay coil D, so that relay coil X releases. Contact a1 closes to complete a circuit from a source 36 of positive potential to lamp 30. Contact a2 closes to complete a latching circuit from source 36 to relay coil A. As a result, relay coil A remains latched after the signal received from ROOM 1 terminates. Relay coil A remains latched and indicator lamp 30 remains lit until transmitter 21 (FIG. 1) sends an ultrasonic signal to the transducer in a different room.

The outputs of the filters corresponding to filter 33 that select the frequency f1 from the transducers leading from the other rooms are also connected to relay coil X through a normally open contact controlled by a coil corresponding to coil D. As in the case of lamp 30 and relay coil A, relay coil X has a normally closed contact in the latching circuit for the lamp energizing the relay coils for ROOMS 2 and 3. Whenever a signal at frequency f1 is received from the transducers in any of the rooms, relay coil X is energized for a short period of time as described above, thereby opening the latching circuit for the lamps in the corresponding column. Accordingly, any previously energized lamp in the column is extinguished and the lamp in the row corresponding to the transducer from which the signal is being received becomes lit.

The control circuitry associated with the lamps in the other columns operates in the same manner. Relay coils B and C correspond to relay coil A; relay coils E and G correspond to relay coil D; and relay coils Y and Z correspond to relay coil X.

What is claimed is:

1. A communication system comprising;

a plurality of portable transmitters each generating a unique signal;

a plurality of fixed receivers positioned to cover different areas at a facility, each receiver being capable of sensing any of the unique signals generated by the transmitters;

a display capable of individually indicating the receivers and the transmitters; and

means connected between the plurality of receivers and the display for indicating on the display which receivers are sensing signals and which transmitters are producing the signals sensed by the respective receivers.

2. The communication system of claim 1, in which the transmitters each generate an ultrasonic sound signal and the receivers are ultrasonic transducers capable of converting ultrasonic sound energy into electrical energy.

3. The communication system of claim 1, in which the transmitters each generate a signal having a unique frequency and the receivers are capable of sensing signals having the frequencies of all the transmitters.

4. The communication system of claim 1, in which the indicating means retains an indication that a receiver is sensing the unique signal produced by a transmitter until another receiver senses the unique signal produced by the same transmitter, causing the indicating means to indicate that the other receiver is sensing the unique signal.

5. The communication system of claim 1, in which the display has a plurality of indicators equal in number to the product of the number of transmitters and the number of receivers and the indicating means comprises control circuitry that energizes the indicator corresponding to the receiver sensing a signal and the transmitter sending the sensed signal.

6. The communication system of claim 1, in which the display forms a grid having a number of areas equal to the product of the number of transmitters and the number of receivers, an indicator being located in each area, and the indicating means energizes the indicator corresponding to the receiver sensing the signal and the transmitter sending the sensed signal.

'7. The communication system of claim 1, in which the display forms a grid of areas arranged in rows and columns, the grid has a column corresponding to each transmitter and a row corresponding to each receiver, an indicator is located in each area, and the indicating means energizes the indicator in the area Where the row that corresponds to the receiver sensing a signal and the column that corresponds to the transmitter generating the sensed signal intersect.

References Cited 3,238,503 3/1966 Uitermark et al. 340-311 X RICHARD A. FARLEY, Primary Examiner.

U.S. C1. X.R.

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Cited By (67)

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US3573620A (en) * 1967-05-31 1971-04-06 John Raymond Ashley Security system with inductive to rf communications links
US3657715A (en) * 1970-04-13 1972-04-18 William J Curtin Ultrasonic paging system
US3696384A (en) * 1971-07-08 1972-10-03 Recognition Devices Ultrasonic tracking and locating system
US3739329A (en) * 1971-05-24 1973-06-12 Recognition Devices Electronic system for locating
US3805265A (en) * 1971-10-06 1974-04-16 Rcds Enterprises Inc Radiant wave locating system
US3805227A (en) * 1972-10-03 1974-04-16 Rcds Enterprises Inc Electronic tracking locating system using multiple frequency, modulated, and time delayed ultrasonic signals
US4225953A (en) * 1978-09-29 1980-09-30 Simon William F Personnel locator
US4237344A (en) * 1979-04-20 1980-12-02 Hospital Communication Systems, Inc. Rapid response health care communications system
US4275385A (en) * 1979-08-13 1981-06-23 Bell Telephone Laboratories, Incorporated Infrared personnel locator system
DE3210002A1 (en) * 1982-03-19 1983-09-22 Zettler Elektrotechn Alois Presence display
US4740788A (en) * 1986-10-06 1988-04-26 Konneker Lloyd K Method of providing location dependent visitor dispatching service
US4814751A (en) * 1987-02-27 1989-03-21 Wildlife Materials, Inc. Patient tracking system
US4835372A (en) * 1985-07-19 1989-05-30 Clincom Incorporated Patient care system
US4850009A (en) * 1986-05-12 1989-07-18 Clinicom Incorporated Portable handheld terminal including optical bar code reader and electromagnetic transceiver means for interactive wireless communication with a base communications station
US4857716A (en) * 1986-05-12 1989-08-15 Clinicom Incorporated Patient identification and verification system and method
US4864313A (en) * 1987-02-18 1989-09-05 Konneker Lloyd K Voting method of locating mobile objects
US4906853A (en) * 1988-03-17 1990-03-06 United Manufacturing Co., Inc. Apparatus and method for varying the timing of a control signal
US4955000A (en) * 1986-07-17 1990-09-04 Nac Engineering And Marketing, Inc. Ultrasonic personnel location identification system
US5027314A (en) * 1988-03-17 1991-06-25 United Manufacturing Co., Inc. Apparatus and method for position reporting
US5291399A (en) * 1990-07-27 1994-03-01 Executone Information Systems, Inc. Method and apparatus for accessing a portable personal database as for a hospital environment
US5317309A (en) * 1990-11-06 1994-05-31 Westinghouse Electric Corp. Dual mode electronic identification system
US5396224A (en) * 1991-11-22 1995-03-07 Hewlett-Packard Company Telemetered patient location system and method
US5426425A (en) * 1992-10-07 1995-06-20 Wescom, Inc. Intelligent locator system with multiple bits represented in each pulse
US5465082A (en) * 1990-07-27 1995-11-07 Executone Information Systems, Inc. Apparatus for automating routine communication in a facility
US5479408A (en) * 1994-02-22 1995-12-26 Will; Craig A. Wireless personal paging, communications, and locating system
US5524129A (en) * 1994-06-23 1996-06-04 Ronald K. Pettigrew Portable counter and data storage system
US5561412A (en) * 1993-07-12 1996-10-01 Hill-Rom, Inc. Patient/nurse call system
US5588009A (en) * 1994-02-03 1996-12-24 Will; Craig A. Personal paging, communications, and locating system
US5627524A (en) * 1993-06-07 1997-05-06 Lifecom, Llc Infrared locator system
US5640157A (en) * 1994-12-15 1997-06-17 Hollandse Signaalapparaten B.V. Information system for a ship
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US6046687A (en) * 1993-11-24 2000-04-04 Trimble Navigation Limited Clandsetine location reporting for missing vehicles
US6292106B1 (en) * 1998-10-13 2001-09-18 Cubic Defense Systems, Inc. Acoustical system and method for simultaneously locating and tracking multiple personnel in rooms of a building
US6344794B1 (en) 1997-11-03 2002-02-05 Hill-Rom, Inc. Personnel and asset tracking method and apparatus
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Cited By (128)

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Publication number Priority date Publication date Assignee Title
US3573620A (en) * 1967-05-31 1971-04-06 John Raymond Ashley Security system with inductive to rf communications links
US3657715A (en) * 1970-04-13 1972-04-18 William J Curtin Ultrasonic paging system
US3739329A (en) * 1971-05-24 1973-06-12 Recognition Devices Electronic system for locating
US3696384A (en) * 1971-07-08 1972-10-03 Recognition Devices Ultrasonic tracking and locating system
DE2232946A1 (en) * 1971-07-08 1973-01-18 Recognition Devices Ultrasonic radiolocation system
US3805265A (en) * 1971-10-06 1974-04-16 Rcds Enterprises Inc Radiant wave locating system
US3805227A (en) * 1972-10-03 1974-04-16 Rcds Enterprises Inc Electronic tracking locating system using multiple frequency, modulated, and time delayed ultrasonic signals
US4225953A (en) * 1978-09-29 1980-09-30 Simon William F Personnel locator
US4237344A (en) * 1979-04-20 1980-12-02 Hospital Communication Systems, Inc. Rapid response health care communications system
US4275385A (en) * 1979-08-13 1981-06-23 Bell Telephone Laboratories, Incorporated Infrared personnel locator system
DE3210002A1 (en) * 1982-03-19 1983-09-22 Zettler Elektrotechn Alois Presence display
US4835372A (en) * 1985-07-19 1989-05-30 Clincom Incorporated Patient care system
US4857716A (en) * 1986-05-12 1989-08-15 Clinicom Incorporated Patient identification and verification system and method
US4850009A (en) * 1986-05-12 1989-07-18 Clinicom Incorporated Portable handheld terminal including optical bar code reader and electromagnetic transceiver means for interactive wireless communication with a base communications station
US4955000A (en) * 1986-07-17 1990-09-04 Nac Engineering And Marketing, Inc. Ultrasonic personnel location identification system
US4740788A (en) * 1986-10-06 1988-04-26 Konneker Lloyd K Method of providing location dependent visitor dispatching service
US4864313A (en) * 1987-02-18 1989-09-05 Konneker Lloyd K Voting method of locating mobile objects
US4814751A (en) * 1987-02-27 1989-03-21 Wildlife Materials, Inc. Patient tracking system
US4906853A (en) * 1988-03-17 1990-03-06 United Manufacturing Co., Inc. Apparatus and method for varying the timing of a control signal
US5027314A (en) * 1988-03-17 1991-06-25 United Manufacturing Co., Inc. Apparatus and method for position reporting
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US5465082A (en) * 1990-07-27 1995-11-07 Executone Information Systems, Inc. Apparatus for automating routine communication in a facility
US5317309A (en) * 1990-11-06 1994-05-31 Westinghouse Electric Corp. Dual mode electronic identification system
US5396224A (en) * 1991-11-22 1995-03-07 Hewlett-Packard Company Telemetered patient location system and method
US5426425A (en) * 1992-10-07 1995-06-20 Wescom, Inc. Intelligent locator system with multiple bits represented in each pulse
US7061396B1 (en) 1992-10-07 2006-06-13 Dwyer Precision Products, Inc. Intelligent locator system
US5627524A (en) * 1993-06-07 1997-05-06 Lifecom, Llc Infrared locator system
US5838223A (en) * 1993-07-12 1998-11-17 Hill-Rom, Inc. Patient/nurse call system
US5561412A (en) * 1993-07-12 1996-10-01 Hill-Rom, Inc. Patient/nurse call system
US6046687A (en) * 1993-11-24 2000-04-04 Trimble Navigation Limited Clandsetine location reporting for missing vehicles
US5588009A (en) * 1994-02-03 1996-12-24 Will; Craig A. Personal paging, communications, and locating system
US5479408A (en) * 1994-02-22 1995-12-26 Will; Craig A. Wireless personal paging, communications, and locating system
US5524129A (en) * 1994-06-23 1996-06-04 Ronald K. Pettigrew Portable counter and data storage system
US5640157A (en) * 1994-12-15 1997-06-17 Hollandse Signaalapparaten B.V. Information system for a ship
US5892817A (en) * 1995-07-10 1999-04-06 Will; Craig Alexander Wireless system for alerting individual to incoming telephone call
US5970388A (en) * 1996-12-26 1999-10-19 Will; Craig A. Wireless system for indicating an incoming telephone call and controlling its transfer
US9235972B2 (en) 1997-01-21 2016-01-12 Pragmatus Mobile LLC Personal security and tracking system
US20050151641A1 (en) * 1997-11-03 2005-07-14 Hill-Rom Services, Inc. Personnel and asset tracking method and apparatus
US6462656B2 (en) 1997-11-03 2002-10-08 Hill-Rom Services, Inc. Personnel and asset tracking method and apparatus
US6825763B2 (en) 1997-11-03 2004-11-30 Hill-Rom Services, Inc. Personnel and asset tracking method and apparatus
US6344794B1 (en) 1997-11-03 2002-02-05 Hill-Rom, Inc. Personnel and asset tracking method and apparatus
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US7010369B2 (en) 1997-11-07 2006-03-07 Hill-Rom Services, Inc. Medical equipment controller
US6292106B1 (en) * 1998-10-13 2001-09-18 Cubic Defense Systems, Inc. Acoustical system and method for simultaneously locating and tracking multiple personnel in rooms of a building
US7315535B2 (en) 2001-03-30 2008-01-01 Hill-Rom Services, Inc. Information management system for bed data
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