FR2630565A1 - Device for locating and/or identifying persons or objects - Google Patents

Device for locating and/or identifying persons or objects Download PDF

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Publication number
FR2630565A1
FR2630565A1 FR8805504A FR8805504A FR2630565A1 FR 2630565 A1 FR2630565 A1 FR 2630565A1 FR 8805504 A FR8805504 A FR 8805504A FR 8805504 A FR8805504 A FR 8805504A FR 2630565 A1 FR2630565 A1 FR 2630565A1
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FR
France
Prior art keywords
identification
receivers
localization
information
locating
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.)
Pending
Application number
FR8805504A
Other languages
French (fr)
Inventor
Bernard Scache
Herve Gory
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.)
HITRONIC
Original Assignee
HITRONIC
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 HITRONIC filed Critical HITRONIC
Priority to FR8805504A priority Critical patent/FR2630565A1/en
Publication of FR2630565A1 publication Critical patent/FR2630565A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber
    • H04M3/546—Arrangements for diverting calls for one subscriber to another predetermined subscriber in private branch exchanges
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42229—Personal communication services, i.e. services related to one subscriber independent of his terminal and/or location

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The invention relates to a device for locating and/or identifying persons or objects, comprising emitters worn by the persons, with a code for each transmitter and a set of receivers. The system is characterised in that the receivers, arranged at known and fixed sites, are interconnected together by a network managed by a computer, and that the location is performed by virtue of software of the said computer and in that the waves used remain confined in a predetermined volume. The invention finds a preferred application for "tracking" mobile units, persons or visitors, in businesses or for automatically sending telephone calls.

Description

L'invention concerne, un dispositif destiné à localiser ou a identifier avec précision, une personne ou un objet, à l'intérieur d'un bâtiment et plus généralement, d'un espace fermé quelconque. The invention relates to a device intended to locate or identify with precision, a person or an object, inside a building and more generally, of any closed space.

On connait déjà, des dispositifs dits de localisation, mais ces systèmes présentent souvent l'inconvénient, de nécessiter des émetteurs ou émetteursrécepteurs puissants, encombrants et couteux et d'autres, des récepteurs mobiles ou orientables, ou encore une installation importante, avec encastrement de "boucle de détection" ainsi que leur cablage. De plus ces dispositifs utilisent des ondes radioélectriques, qui présentent l'inconvénient, d' avoir une portée difficilement maitrisable, en passant à travers des cloisons et des plafonds, ce qui risque d'entrainer des erreurs de localisation. So-called localization devices are already known, but these systems often have the disadvantage of requiring powerful, bulky and expensive transmitters or transceivers and others, mobile or orientable receivers, or even a large installation, with built-in "detection loop" and their wiring. In addition, these devices use radio waves, which have the disadvantage of having a range that is difficult to control, passing through partitions and ceilings, which risks causing location errors.

La présente invention présente l'originalité, d'utiliser des émetteurs de faible puissance et de faible portée, sous la forme miniaturisée dite de "badges" peu couteux, formant avec un ensemble de récepteurs, disposés à des emplacements prédéterminés et reliés à un calculateur, une interaction, ne nécessitant pas d'installation particulière, grâce à la mise en oeuvre d'ondes, par exemple "ultrasoniques", qui ne traversent pas les cloisons et qui ont ainsi la propriété de rester confinées, dans un volume fermé. The present invention has the originality of using transmitters of low power and of short range, in the miniaturized form called inexpensive "badges", forming with a set of receivers, arranged in predetermined locations and connected to a computer. , an interaction, not requiring any particular installation, thanks to the implementation of waves, for example "ultrasonic", which do not pass through the partitions and which thus have the property of remaining confined, in a closed volume.

Bien sur, l'utilisation d'ondes ultrasoniques précitée, n'est ainsi mentionnée, qu'à titre d'exemple avantageux, mais nullement limitatif et le domaine de l'invention, n'est pas ainsi limité et s'étend aussi bien à 1' utilisation d'autres ondes, ayant la même propriété, de rester confinées dans un volume déterminé, ainsi qutà leur utilisation, aussi bien pour la localisation et/ou l'identification d'objets. Of course, the use of the aforementioned ultrasonic waves is thus only mentioned, as an advantageous example, but in no way limiting, and the field of the invention is not thus limited and extends as well. with the use of other waves, having the same property, of remaining confined in a determined volume, as well as with their use, as well for the localization and / or the identification of objects.

On comprendra mieux ces caractéristiques nouvelles, ainsi que d'autres qui s'y rattachent, en se reportant à la description suivante et aux dessins annexés, donnant à simple titre d'exemple, un mode de mise en oeuvre avantageux mais il faut le répéter, nullement limitatif, à l'égard duquel:
La Fig.1 représente, une vue schématique en plan, d'un local muni d' une installation, de localisation et d'identification, de personne ou d' objet, conforme à l'invention.These new characteristics will be better understood, as well as others which are attached thereto, by referring to the following description and to the appended drawings, giving a simple example, an advantageous mode of implementation but it must be repeated , in no way limitative, in respect of which:
Fig.1 shows a schematic plan view of a room with an installation, location and identification, person or object, according to the invention.

La Fig.2 représente, une vue en perspective d'un "badge", pour la localisation d'une personne, conformément à l'invention. Fig.2 shows a perspective view of a "badge" for the location of a person, according to the invention.

La Fig.3 représente, une vue par dessous, du "badge" selon la Fig.2. Fig.3 shows, from below, the "badge" according to Fig.2.

Selon ces Figures, on a représenté en -1-, le réseau d'inte-ónnexion
des des récepteurs ou "balisesn -2-, situés à des emplacements prédéter
minés, pour interagir avec un calculateur central -3-.According to these Figures, we have represented in -1-, the integration network
receivers or "beacons -2-, located at predeter locations
mined, to interact with a central computer -3-.

Tous les visiteurs, tels que -4-, sont munis de badges, tels que -5
qui émettent, pendant un temps très court et à intervalles réguliers,
leurs codes respectifs. Les récepteurs situés dans les différentes pièces recoivent les codes des personnes présentes et les "mémorisent". Sur interrogation du calculateur central, les récepteurs informent celui-ci, de la situation des personnes présentes, à ltintérieur de leur domaine de détection.All visitors, such as -4-, are provided with badges, such as -5
which emit, for a very short time and at regular intervals,
their respective codes. The receivers located in the different rooms receive the codes of those present and "memorize" them. Upon interrogation of the central computer, the receivers inform it of the situation of the people present, within their detection range.

On peut ainsi suivre, à intervalles réguliers, le déplacement d'une personne, à l'intérieur d'une pièce ou d'un ensemble de pièces, ou bien encore, interdire la présence dune personne dans un lieu, ou déclencher l'ouverture d'une porte sur demande, si le numéro de badge, fait partie de ceux qui y sont autorisés. We can thus follow, at regular intervals, the movement of a person, inside a room or a set of rooms, or even, prohibit the presence of a person in a place, or trigger the opening a door on request, if the badge number is one of those authorized.

Les badges, selon la Pig.2, comportent les indications habituelles d'un badge, destiné à être porté de manière apparente: avec photographie en -11 # texte ou graphisme en -12- et auquelles s'ajoute, un système électronique -13-, pour fournir un signal codé au transducteur -14 et rechargeable éven tuellement, par les électrodes conductrices, désignées -16-, sur la Fig.3, reliées à la batterie -15- tandis que la source d'énergie, peut aussi être constituée par une pile. The badges, according to Pig. 2, include the usual indications of a badge, intended to be worn in an apparent manner: with photography in -11 # text or graphics in -12- and to which is added, an electronic system -13 -, to provide a coded signal to the transducer -14 and possibly rechargeable, by the conductive electrodes, designated -16-, in Fig.3, connected to the battery -15- while the power source can also be consisting of a battery.

Afin d'économiser cette énergie et d'assurer au système, une bonne autonomie, le transducteur n'émettra que pendant un temps ecourté "T", lors de chaque intervalle de temps "I", débutant à sa mise sous tension. In order to save this energy and ensure good autonomy for the system, the transducer will only emit for a short time "T", during each time interval "I", starting when it is switched on.

Le rapport I/T sera par exemple compris, entre 50 et 500, ce qui permet aussi, si plusieurs personnes sont présentes en même temps, dans le "volume" de détection d'un même récepteur, d'avoir une bonne probabilité, que les émetteurs n'émettent pas simultanément, ce qui perturberait le récepteur. I pourra être d'environ 5 à 10 secondes, ce qui permet au système de connaitre la position d'un badge, toutes les 5 à 10 secondes, mais let T peuvent avoir une valeur quelconque et choisie, selon l'application envisagée. The I / T ratio will for example be between 50 and 500, which also makes it possible, if several people are present at the same time, in the "volume" of detection of the same receiver, to have a good probability, that the transmitters do not transmit simultaneously, which would disturb the receiver. I could be around 5 to 10 seconds, which allows the system to know the position of a badge, every 5 to 10 seconds, but let T can have any value and chosen, depending on the application envisaged.

Le système électronique, réalisé avec des composants électroniques "dis crets", ou par assemblages, par exemple sur un circuit "imprimé" de circuits "intégrés", ou par la combinaison de ces moyens, sert à "piloter" le trats- docteur Ce système électronique sera avantageusement incorporé, dans ll dpaisseur du badge, tandis que le code de chaque badge pourra être déterminé, soit par coupure de "N" pistes sur un circuit imprimé, ou donné par une "mémoire programmée". The electronic system, produced with "discrete" electronic components, or by assemblies, for example on a "printed" circuit of "integrated" circuits, or by the combination of these means, is used to "control" the trats-doctor Ce The electronic system will advantageously be incorporated in the thickness of the badge, while the code for each badge can be determined, either by cutting "N" tracks on a printed circuit, or given by a "programmed memory".

Les récepteurs sont placés à des emplacements détéiminés, à raison d'un ou plusieurs par pièces. Ils recoiwnt les signaux des badges à leur portée et "mémorisent", les numéros de ces badges. Ils dialoguent en permanence avec le calculateur central -3-, par l'intermédiaire du réseau -1-, grâce au "modulatOur démodulateur dit modem" intégré. The receivers are placed in specific locations, one or more per piece. They receive the badges signals within their reach and "memorize" the numbers of these badges. They are in constant dialogue with the central computer -3-, via the network -1-, thanks to the integrated "modulatOur demodulator".

Le réseau " sera avantageusement constitué, parles fils d'alimentation de prises électriques usuelles; sur lesquels les "modems" des récep teurs superposeront les informations, ce qui présente l'avantage d'utiliser un réseau existant ainsi que, de ne pas nécessiter d'installation particulière et de permettre, en un seul branchement, d'avoir la source et le moyen de transmission d'informations, tandis que sinon tout autre type de réseau pourra être utilisé, comme par exemple un cable 'torsadé, fibre optique ou réseau radioélectriXque.  The network "will advantageously be constituted by the supply wires of usual electrical outlets; on which the" modems "of the receivers will superimpose the information, which has the advantage of using an existing network as well as of not requiring d 'particular installation and to allow, in a single connection, to have the source and the means of transmission of information, while otherwise any other type of network could be used, such as for example a twisted cable, fiber optic or network radioelectric.

Enfin, il convient de répéter, que l'invention ne se limite pas au seul mode de mise en oeuvre, ainsi décrit et représent4 à simple titre d'exemple pour matérialiser l'invention et que son domaine s'étend expressément à toutes les variantes, tant d'application que d'exécution et particulièrement à celles, mettant en oeuvre des combinaisons de moyens et procédés équivalents, ou même simplement comparables. Finally, it should be repeated that the invention is not limited to the single mode of implementation, thus described and shown simply by way of example, in order to materialize the invention and that its field expressly extends to all variants. , both in application and in execution, and particularly to those implementing combinations of equivalent or even simply comparable means and methods.

A cet égard on mentionnera explicitement, que par exemple, le système informatique central peut comprendre, un calculateur et son interface avec le réseau, notamment du genre dit "P C". Il a pour objet de dialoguer en permanence avec les réceptgeurs de les interroger et/ou receuillir leurs informations.On ajoutera encore, que l'utilisation d'un "logiciel" pourra permettre, de savoir quel récepteur a "en mémoire" certains codes et par conséquent, connaissant la position physique des réceptgeurs, en déduire dans quel espace cloisonné, se trouve le porteur de badge et/ou sa positif à quelque mètres près, dans une pièce, tandis que pour des applicatiXons de "haute sécurité", on pourra envisager, de multiplier la présence de cal culateurs, afin de pallier à la défaillance éventuelle de l'un d'eux. In this regard, it will be explicitly mentioned that, for example, the central computer system may include a computer and its interface with the network, in particular of the so-called "P C" type. Its purpose is to constantly dialogue with the receivers to question them and / or collect their information. We will also add, that the use of "software" may make it possible to know which receiver has certain codes in memory and Consequently, knowing the physical position of the receivers, deducing from it in which partitioned space, the badge holder and / or his positive is within a few meters, in a room, while for "high security" applications, we can consider, to multiply the presence of calculators, in order to compensate for the possible failure of one of them.

On mentionnera en outre et accessoirement, que sur la Fig.1, -6- désigne le local dont l'accès est limité et contrôlé, par la gâche dite électrique -7-, de sa serrure, tandis que -8- est sa "balise" de contrôle d' accès, qui est asservie au système de demande d'ouverture -9- et que -10désigne un poste téléphonique, alors que, les localisations permettent d' aiguiller automatiquement les appels téléphoniques, vers leurs destinataires.  It will also be mentioned, incidentally, that in FIG. 1, -6- designates the room whose access is limited and controlled, by the so-called electric strike -7-, with its lock, while -8- is its " access control tag, which is slaved to the opening request system -9- and that -10 designates a telephone set, whereas, the locations make it possible to automatically route telephone calls to their recipients.

Claims (5)

REVENDICATIONS 1 - Dispositif de localisation et/ou d'identification , de personnes ou d'objet, à l'intérieur des bâtiments, caractérisé par le fait qu'il combine, des émetteurs, portés par les personnes ou objets à localiser, avec un code différent pour chaque émetteur et un ensemble de récepteurs recevant les sii gnaux émis par les dits émetteurs, tandis que les récepteurs sont reliés par l'intermédiaire d'un "réseau", à un système de traitement de "l'information" et que, les ondes utilisées ont# la propriété de rester confinées dans un volume déterminé et cloisonné. 1 - Device for locating and / or identifying people or objects inside buildings, characterized by the fact that it combines transmitters carried by people or objects to be located with a code different for each transmitter and a set of receivers receiving the signals emitted by the said transmitters, while the receivers are connected via a "network", to an "information" processing system and that, the waves used have the property of # being confined in a determined and partitioned volume. 2-- DISPOSITIF de localisation et/ou d'identification, selon la revendication 1 , caractérisé par le fait, que les récepteurs, tels que -2-, com port#ent un système de "mémorisation et/ de traitement de' 1 'information".  2-- DEVICE for localization and / or identification, according to claim 1, characterized in that the receivers, such as -2-, com port # ent a system of "storage and / processing of '1' information". 3 - Dispositif de localisation et/ou d'identification, selon les revendications 1 et 2 , caractérisé par le fait, que les réceptXeurs, tels que -2-, transmetXtent leurs informations à un réseau -1-, par l'intermédiaire d'une interface, incluse dans le récepteur -2 3 - Device for localization and / or identification, according to claims 1 and 2, characterized in that the receivers, such as -2-, transmit their information to a network -1-, through an interface, included in the receiver -2 4o Dispositif de localisation et/ou d'identification, selon l'une quelconque des revendications 1 , 2e et 3', caractérisé par le fait, que les ré cept/eurs, tels que -2-, ne nécessitent pas d'être mobiles ni d'avoir un dispositif d'orientation, mais sont disposés de façon invariable et connue par rapport, au système de traitement de l'information -3-. 4o location and / or identification device according to any one of claims 1, 2e and 3 ', characterized in that the receivers / eurs, such as -2-, do not need to be mobile nor to have an orientation device, but are arranged in an invariable and known manner with respect to the information processing system -3-. 5 - Dispositif de localisation et/ou d'identification, selon l'une quelconque des revendications 1', 2 , 3 , et 40, caractérisé par le fait, que les réceptXeurs, tels que -2-, comportent un système de mesure de l'amplitude du signal reçu et que, la discrimination de la position d'un émetteur, tel que -5-, dont le code est reçu simultanément, par plusieurs récepteurs, tels que -2- est réalisée, en fonction de la mesure du "niveau" reçu par chacun des récepteurs, tels que -2-. 5 - Device for localization and / or identification, according to any one of claims 1 ', 2, 3, and 40, characterized in that the receptors, such as -2-, include a system for measuring the amplitude of the received signal and that, the discrimination of the position of a transmitter, such as -5-, whose code is received simultaneously, by several receivers, such as -2- is carried out, according to the measurement of the "level" received by each of the receivers, such as -2-. 6 - Dispositif de localisation et/ou d'identification, selon l'une quelconque des revendications 10, 2 , 3-, 4- et 5', caractérisé parle fait, que l'information de localisation et/ou d'identification, résulte de l'utilisa- tion d'un "logiciel" incorporé dans le système de traitement de l'information. 6 - A location and / or identification device according to any one of claims 10, 2, 3-, 4- and 5 ', characterized by the fact that the location and / or identification information results the use of "software" incorporated into the information processing system. 7 - Dispositif de localisation et/ou d'identification, selon l'une.quel- conque des revendications 10, 2', 3 , 4 , 50 et 6', caractérisé par le. fait, que la localisation et/ou l'identification est obtenue, par la combinaison de divers récepteurs, tels que -2-, interagissant entre-eux. 7 - Device for localization and / or identification, according to une.que- any of claims 10, 2 ', 3, 4, 50 and 6', characterized by. fact, that localization and / or identification is obtained, by the combination of various receptors, such as -2-, interacting with each other. 8"- Dispositif de localisation et/ou d'identification, selon l'une quelconque des revendications 1 , 2 , 3 , 4 , 5 , 6 et 7 , caractérisé par le fait, que chaque émetteur, tel que -5- combine, sa source d'énergie -15avec son électronique démission et de codage et le transducteur -14-, par incorporation dans un badge, tel que -5-. 8 "- Locating and / or identification device according to any one of claims 1, 2, 3, 4, 5, 6 and 7, characterized in that each transmitter, such as -5- combines, its power source -15 with its electronic resignation and coding and the transducer -14-, by incorporation in a badge, such as -5-. 9 - Dispositif de localisation et/ou d'identification, selon l'une quelconque des revendications 1 , 2 , 3 , 4 , 5 , 6 , 7 et 8 , caractérisé par le fait, que les localisations permettent, d'aiguiller automatiquement, les appels téléphoniques, vers leurs destinataires.  9 - Device for localization and / or identification, according to any one of claims 1, 2, 3, 4, 5, 6, 7 and 8, characterized in that the localizations allow, to automatically switch, telephone calls, to their recipients.
FR8805504A 1988-04-26 1988-04-26 Device for locating and/or identifying persons or objects Pending FR2630565A1 (en)

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Cited By (9)

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EP0578374A1 (en) * 1992-06-29 1994-01-12 Nortel Networks Corporation Method and apparatus for providing a personal locator, access control and asset tracking service using an in-building telephone network
EP0583623A1 (en) * 1992-07-27 1994-02-23 ALCATEL ITALIA S.p.A. Arrangement for and method of locating an object or person within a geographical area, and localization transmitter and receiver suitable for the same
WO1995001617A1 (en) * 1993-07-02 1995-01-12 Executone Information Systems, Inc. A system for identifying object location
NL9401663A (en) * 1994-08-17 1996-04-01 Jaap Van Asselt System for locating persons within a limited area or a building and alerting a central unit
EP0717380A1 (en) * 1994-12-15 1996-06-19 Hollandse Signaalapparaten B.V. Information system for a ship
FR2786974A1 (en) * 1998-12-07 2000-06-09 Sagem METHOD FOR ROUTING INCOMING CALLS TO A PERSON
GB2430097A (en) * 2005-09-13 2007-03-14 James Julian Malin Locating a person in a building during an emergency
RU2609582C1 (en) * 2016-02-09 2017-02-02 Открытое акционерное общество "ОКБ-Планета" ОАО "ОКБ-Планета" Local object positioning system
RU2717079C1 (en) * 2019-09-23 2020-03-18 Федеральное государственное казённое военное образовательное учреждение высшего образования "Военная академия материально-технического обеспечения имени генерала армии А.В. Хрулева" Министерства обороны Российской Федерации Method of monitoring condition of underground structures and system for its implementation

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EP0578374A1 (en) * 1992-06-29 1994-01-12 Nortel Networks Corporation Method and apparatus for providing a personal locator, access control and asset tracking service using an in-building telephone network
EP0583623A1 (en) * 1992-07-27 1994-02-23 ALCATEL ITALIA S.p.A. Arrangement for and method of locating an object or person within a geographical area, and localization transmitter and receiver suitable for the same
USRE37531E1 (en) 1993-07-02 2002-01-29 Executone Information Systems, Inc. System for identifying object locations
US5455851A (en) * 1993-07-02 1995-10-03 Executone Information Systems, Inc. System for identifying object locations
WO1995001617A1 (en) * 1993-07-02 1995-01-12 Executone Information Systems, Inc. A system for identifying object location
NL9401663A (en) * 1994-08-17 1996-04-01 Jaap Van Asselt System for locating persons within a limited area or a building and alerting a central unit
EP0717380A1 (en) * 1994-12-15 1996-06-19 Hollandse Signaalapparaten B.V. Information system for a ship
NL9402126A (en) * 1994-12-15 1996-07-01 Hollandse Signaalapparaten Bv Information system for a ship.
US5640157A (en) * 1994-12-15 1997-06-17 Hollandse Signaalapparaten B.V. Information system for a ship
FR2786974A1 (en) * 1998-12-07 2000-06-09 Sagem METHOD FOR ROUTING INCOMING CALLS TO A PERSON
GB2430097A (en) * 2005-09-13 2007-03-14 James Julian Malin Locating a person in a building during an emergency
RU2609582C1 (en) * 2016-02-09 2017-02-02 Открытое акционерное общество "ОКБ-Планета" ОАО "ОКБ-Планета" Local object positioning system
RU2717079C1 (en) * 2019-09-23 2020-03-18 Федеральное государственное казённое военное образовательное учреждение высшего образования "Военная академия материально-технического обеспечения имени генерала армии А.В. Хрулева" Министерства обороны Российской Федерации Method of monitoring condition of underground structures and system for its implementation

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