FR3108432A1 - System and method for detecting persons. - Google Patents

Abstract

A person detection system (400), comprising: at least one user device (1021-102m), each adapted to be worn by a user and equipped with a Bluetooth interface for detecting a Bluetooth signal, and minus one transmitting Bluetooth beacon (1101-110n), each intended to be positioned in a detection location and to emit a Bluetooth signal when activated; characterized in that at least one transmitting Bluetooth beacon (1101-110n) can only be activated manually. It also relates to a method for detecting people. Figure for the abstract: Fig. 4

Description

Person detection system and method.

The present invention relates to a system and a method for detecting people in one or more places.

The field of the invention is the field of the detection of people in places, in particular the field of pointing people in places, generally remote.

State of the art

There are currently different techniques for detecting people in places, whether for the detection of people or the detection of people passing, or for the pointing of people in different places, or at different locations within the same place.

For example, systems based on video surveillance are known: these systems, although very effective, require heavy and costly installations.

Systems based on geolocation or on code or card identification are also known: these systems, which are lighter and less expensive than video surveillance, have the disadvantage of being less efficient and easier to circumvent.

Systems based on communication using the NFC (Near Field Communication) standard between beacons installed on site and user devices carried by the persons to be detected are also known. These systems are still expensive and complex to deploy and require the development of specific user devices including NFC functionality. In addition, detection by NFC does not have satisfactory reliability.

An object of the present invention is to remedy at least one of the aforementioned drawbacks.

Another object of the present invention is to propose a system for detecting people that is less expensive, easier and faster to deploy on one or more places/sites.

Another object of the present invention is to propose a system for detecting people that is more reliable in terms of detection while avoiding unwanted or undesired detections.

• au moins un appareil utilisateur, chacun prévu pour être porté par un utilisateur, et équipé d’une interface Bluetooth pour détecter un signal Bluetooth, et
• au moins une balise Bluetooth émettrice, chacune prévue pour être positionnée en un emplacement de détection, et émettre un signal Bluetooth lorsqu’elle est activée ;

caractérisé en ce qu’au moins une balise Bluetooth émettrice est uniquement activable manuellement.The invention makes it possible to achieve at least one of these goals by means of a system for detecting the passage of people, comprising:

• at least one user device, each intended to be worn by a user, and equipped with a Bluetooth interface for detecting a Bluetooth signal, and
• at least one transmitter Bluetooth beacon, each designed to be positioned at a detection location, and emit a Bluetooth signal when activated;

characterized in that at least one transmitting Bluetooth beacon can only be activated manually.

In other words, the Bluetooth beacon only emits a Bluetooth signal when it is activated manually. In other words, the beacon is off by default and does not emit a signal. For it to emit a Bluetooth signal, the user must turn it on by a manual action on said beacon.

Thus, the present invention proposes a person detection system implementing one or more user devices and at least one Bluetooth beacon. Such a system is easy, quick and inexpensive to deploy on one or more locations, or sites, because it requires very little, if any, work on each site to be equipped: it suffices to install at least one Bluetooth beacon on the Site concerned. The use of a Bluetooth signal allows greater detection reliability.

In addition, the system according to the invention implements at least one beacon that the user must activate manually so that the system does not risk carrying out an untimely detection or an unwanted detection. In addition, manual activation by a manual action on the beacon makes it possible to ensure that the person detected by means of his user device is indeed on site in the immediate vicinity of the beacon and not at a distance from the beacon, which increases detection efficiency.

Finally, the manual activation of the beacon, which by default is off or on standby, makes it possible to reduce the energy consumed by said beacon, which makes the system less energy-intensive: this energy saving can be substantial when the system includes a large number of beacons distributed in different locations within the same site, or on different sites.

By “activation” of a Bluetooth beacon, we mean switching on or coming out of standby of said beacon. In a comparable way, by "deactivation" of a Bluetooth beacon, we mean turning off or putting said beacon on standby.

In the following, the term "beacon" can be used to designate a Bluetooth beacon. Additionally, the term “device” may be used to refer to a user device.

According to an optional feature, at least one beacon may include a mechanical button to activate said beacon.

Thus, a mechanical support is necessary to activate the beacon and obtain a transmission of a Bluetooth signal by said beacon. Such a mechanical button reduces the risk of inadvertent detection of the Bluetooth beacon, while being easy to use for users.

Alternatively, at least one beacon may include a touch activation button.

Advantageously, at least one beacon can be configured to turn off automatically after its activation.

Such a configuration makes it possible to turn off the beacon automatically after its activation, which makes it possible on the one hand to reduce the electrical energy consumed by the beacon, and on the other hand to reduce unwanted detections.

The beacon can be configured to automatically turn off after a predetermined time. For example, such a predetermined duration can be a few seconds.

Alternatively or additionally, the beacon can be configured to automatically turn off after a predetermined number of Bluetooth signal transmission iterations. For example, the beacon can be configured to turn off automatically after emitting the Bluetooth signal five times.

Alternatively or in addition, the beacon can be deactivated manually by pressing a button, mechanical or tactile, which can be the same button as the activation button or a separate button.

Preferably, at least one beacon can comprise an on-board electrical power source.

Thus, the deployment of the system according to the invention is even faster, simpler and less expensive.

The on-board electrical power source may for example comprise, or consist of, an on-board battery, removable or not, or removable or not, with a view to its replacement.

The on-board electrical power source can be rechargeable, via a wired interface or an inductive-type wireless interface.

Preferably, at least one beacon may comprise at least one attachment or fastening means, in particular removable or removable, of said beacon on a support, such as a wall, a door, a table, etc.

Such a means can be provided to achieve fixing by gluing, by screwing, by magnetic coupling, etc.

• un identifiant de ladite balise, et/ou
• un identifiant de l’emplacement de ladite balise, en particulier un identifiant du site et/ou un identifiant d’un emplacement au sein d’un site.

Advantageously, at least one beacon can be configured to emit a Bluetooth signal comprising:

• an identifier of said tag, and/or
• an identifier of the location of said beacon, in particular an identifier of the site and/or an identifier of a location within a site.

Of course, the Bluetooth signal can include only one of these data.

This or these data are used to determine the location/site, and possibly the location within a site, in which the detected user is located.

Advantageously, at least one user device can be equipped with a communication interface with a remote server, through a communication network.

Such a communication interface can be wired or wireless.

Such an interface can be used to communicate to the remote server detection data relating to one or more detected beacons. This makes it possible to perform dynamic monitoring of detections relating to one or more people on remote sites, in particular distributed in space.

For at least one user device, communication with the remote server may be performed at a predetermined frequency. When the communication network is not available, the data to be communicated can be stored at the level of the device and communicated to the server as soon as the connection with the network is established.

In particular, the communication with the remote server can be carried out each time a beacon is detected by the user device. This has the advantage of allowing monitoring of each detection in real time. As mentioned above, when the communication network is not available, then the detection data is stored at the user device for later transmission.

• un identifiant dudit appareil utilisateur,
• un identifiant de la personne à qui est associé ledit appareil utilisateur,
• une donnée horaire de réception du signal Bluetooth,
• au moins une donnée transmise, audit appareil utilisateur, par au moins une balise Bluetooth, telle que l’une quelconque des données listées plus haut, c’est-à-dire un identifiant de ladite balise, et/ou un identifiant de l’emplacement de ladite balise, en particulier un identifiant du site et/ou un identifiant d’un emplacement au sein d’un site.

According to an advantageous characteristic, at least one user device can be configured to transmit, to an external device, a so-called detection signal, comprising any combination of at least one of the following data:

• an identifier of said user device,
• an identifier of the person with whom said user device is associated,
• a time datum of reception of the Bluetooth signal,
• at least one data transmitted, to said user device, by at least one Bluetooth beacon, such as any of the data listed above, that is to say an identifier of said beacon, and/or an identifier of the location of said tag, in particular a site identifier and/or an identifier of a location within a site.

In particular, the data transmitted to the external device must make it possible to determine the site of the detection and the user, and optionally, but preferably, the time of the detection.

The detection site can be determined using a site identifier, or an identifier of the Bluetooth beacon detected by the user device and previously associated with a site identifier.

The user can be determined by means of a user identifier, or an identifier of the user device previously associated with a user identifier.

The time of detection can be determined thanks to a timestamp data, relating to the moment of reception of the Bluetooth signal by the user device, determined at the level of the user device, which in turn transmits it to the device. external.

• un identifiant dudit appareil utilisateur ou un identifiant de la personne à qui est associé ledit appareil utilisateur,
• une donnée horaire de réception du signal Bluetooth, également appelée donnée d’horodatage, et
• un identifiant de la balise, ou un identifiant de l’emplacement de la balise, détectée par l’appareil utilisateur et transmis par la balise audit appareil utilisateur.

According to a non-limiting embodiment, at least one user device can be configured to transmit, to an external device, a so-called detection signal, comprising:

• an identifier of said user device or an identifier of the person with whom said user device is associated,
• Bluetooth signal reception time data, also called timestamp data, and
• an identifier of the beacon, or an identifier of the location of the beacon, detected by the user device and transmitted by the beacon to said user device.

The external device may be a remote server from the user device at the time of the detection signal transmission, such as the remote server described above.

Alternatively, the external device may be a device local to the user device at the time of transmitting the detection signal.

The detection signal can be transmitted by wire. In this case, the user device comprises a wired communication interface.

The detection signal can be transmitted wirelessly. In this case, the user device comprises a wireless communication interface.

According to an advantageous characteristic, at least one user device can be configured to request manual validation of at least one Bluetooth signal received by said user device, through a user interface.

Such a validation step makes it possible to validate the detection and to ensure that the detection has indeed taken place, which makes it possible to prevent detection from being missed, for example because the Bluetooth functionality of the user device has been damaged or defective.

• d’un écran d’affichage de l’appareil utilisateur, en particulier tactile,
• d’un moyen de signalisation lumineux, tel qu’un voyant, et/ou
• d’un moyen de signalisation sonore, tel qu’un haut parleur ;

équipant l’appareil utilisateur.Signal reception can be signaled through:

• a display screen of the user device, in particular a touch screen,
• a luminous signaling means, such as a light, and/or
• a sound signaling means, such as a loudspeaker;

equipping the user device.

The validation can be carried out through a user interface of the user device and which can comprise a touch surface, or a mechanical button, etc.

Advantageously, at least one user device can be configured to request authentication of a user using said device, for example by requesting an identifier and a password associated with said identifier.

According to a particularly preferred exemplary embodiment, at least one user device can be a Smartphone.

Thus, it is not necessary to design and produce a device dedicated to the system according to the invention on the hardware level.

Of course, according to an alternative, at least one user device can be a box dedicated and designed specifically for the system according to the invention.

In any case, the user device may be equipped with a software application configured to implement at least some of the functions that are performed in the user device.

• demande d’authentification d’un utilisateur ;
• interprétation du signal Bluetooth émise par une balise, et éventuellement extraction des données qu’il contient ;
• demande de validation utilisateur d’un signal Bluetooth, ou des données reçues dans un signal Bluetooth, émis par une balise Bluetooth ;
• détermination des données à transmettre vers un appareil externe, et éventuellement protection desdites données ;
• etc.

In particular, such an application can be provided to perform any combination of at least one of the following operations:

• user authentication request;
• interpretation of the Bluetooth signal emitted by a beacon, and possibly extraction of the data it contains;
• request for user validation of a Bluetooth signal, or data received in a Bluetooth signal, transmitted by a Bluetooth beacon;
• determination of the data to be transmitted to an external device, and possibly protection of said data;
• etc

• plusieurs appareils utilisateurs prévus pour être portés par des utilisateurs distincts ; et/ou
• plusieurs balises prévues pour être disposées dans des lieux distincts ou à des emplacements distincts au sein d’un même lieu.

The system according to the invention may comprise:

• several user devices intended to be worn by separate users; and or
• several beacons intended to be arranged in separate places or at separate locations within the same place.

The system according to the invention may further comprise a remote server, in communication with at least one user device through a communication network, in particular wireless.

This remote server may be the server referred to above.

• émission, par une balise Bluetooth émettrice disposée dans ledit lieu, d’un signal Bluetooth, et
• détection dudit signal Bluetooth par un appareil utilisateur, porté par ladite personne ;

caractérisé en ce que l’émission du signal Bluetooth par ladite balise est conditionnée à une activation manuelle de ladite balise.According to another aspect of the invention, there is proposed a method for detecting people comprising at least one iteration of a detection phase carried out for at least people in at least one location:

• emission, by a transmitter Bluetooth beacon placed in said location, of a Bluetooth signal, and
• detection of said Bluetooth signal by a user device, worn by said person;

characterized in that the transmission of the Bluetooth signal by said beacon is conditional on manual activation of said beacon.

In general, the method according to the invention may comprise, in terms of step or operation, any combination of at least one of the functionalities described above with reference to the system according to the invention, and which are not repeated here for the sake of brevity.

Description of figures and embodiments

• les FIGURES 1-4 sont des représentations schématiques de plusieurs exemples de réalisation non limitatifs d’un système selon l’invention ; et
• la FIGURE 5 est une représentation schématique d’un exemple de réalisation non limitatif d’un procédé selon l’invention.

Other advantages and characteristics will appear on examination of the detailed description of a non-limiting embodiment, and of the appended drawings in which:

• FIGURES 1-4 are schematic representations of several non-limiting example embodiments of a system according to the invention; And
• FIGURE 5 is a schematic representation of a non-limiting exemplary embodiment of a method according to the invention.

It is understood that the embodiments which will be described below are in no way limiting. In particular, variants of the invention may be imagined comprising only a selection of characteristics described below isolated from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from other the prior state of the art. This selection includes at least one preferably functional feature without structural details, or with only part of the structural details if this part is only sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.

In the figures, the elements common to several figures retain the same reference.

FIGURE 1 is a schematic representation of a non-limiting exemplary embodiment of a system according to the invention.

System 100, shown in FIGURE 1, includes a user device 102 with an interface for receiving a Bluetooth signal. Such a user device 102 can be a Smartphone, a tablet, a dedicated electronic device, and more generally any electronic device equipped with a Bluetooth signal detection interface.

In the example shown, the device 102 comprises a user interface in the form of a touch screen 104 allowing the user to interact with the device 102, on the one hand to read information displayed by the device, and on the other hand to enter commands, or data, by touch. Of course other known user interfaces can be used

A computer application 106 is installed in the device 102 to perform various functions within the user device.

The device 102 is intended to be worn by a user, and makes it possible to detect the presence, or the passage, of said user on a place or a site.

The system 100 further comprises a Bluetooth beacon 110, intended to be installed on a place or a site.

Beacon 110 is configured to emit a Bluetooth signal, in particular omnidirectionally. Alternatively, Beacon 110 can be designed so that the Bluetooth signal it emits is directional.

• un identifiant de ladite balise 110, ou
• un identifiant de l’emplacement de ladite balise 110, par exemple un identifiant d’un site et/ou un identifiant d’un emplacement au sein d’un site.

The Bluetooth signal emitted by beacon 110 includes at least one piece of data representing:

• an identifier of said beacon 110, or
• an identifier of the location of said beacon 110, for example an identifier of a site and/or an identifier of a location within a site.

Beacon 110 includes a button 112 for manually activating beacon 110 and triggering transmission of the Bluetooth signal. In the example shown, the button 112 is a mechanical button, and is in the form of a push button. Alternatively, button 112 may be a touch button, for example.

Pressing button 112 activates beacon 110 and triggers transmission of the Bluetooth signal. The beacon includes a configuration, software or hardware, so that it emits the Bluetooth signal for a period of about ten seconds, and is automatically deactivated by putting it in standby mode or by turning off.

In the example shown, the beacon 110 is fixed to a wall 114, such as a wall or a door, for example by gluing or screwing.

We will now describe an example of the use of system 100.

The beacon 110 is configured to be associated with a place, then installed on this place. For example, an identifier of the beacon 110 can be stored in association with an identifier of said place in a database, or an identifier of the place, or of a location in a place, can be directly stored in the beacon 110.

A user, wishing to use the system 100, authenticates himself on the device 102, and in particular through the application 106, during an authentication step. To do this, an identifier and a password associated with this identifier are entered by the user through the application 106. This identifier is stored within the device 102. This authentication step is optional because the The user identifier can be stored in the device 102 at the factory. According to yet another alternative, an identifier of the device 102 can be stored with an identifier of the user in a database external to the device 102, for example when the device 102 is assigned to the user. 'user.

Then, when the user wearing the device 102 which is associated with him during authentication, goes to the location where the beacon 110 is located, he triggers detection of the beacon 110 by his device 102. To do this , the user manually presses the button 112 of the beacon 110. This support activates the beacon 110 and triggers the transmission, by the beacon 110, of the Bluetooth signal which includes either the identifier of the beacon 110 or the identifier of the location of the beacon 110.

Device 102 detects this Bluetooth signal. The identifier found in the Bluetooth signal is extracted, for example by the application 106. Preferably, the reception of the Bluetooth signal is timestamped by the device 102, still by the application for example.

• pour confirmer la détection ; et/ou
• pour confirmer que l’identifiant, et/ou la donnée d’horodatage, sont corrects.

According to yet another optional step, the device 102, and in particular the application 106, can request confirmation from the user following the detection, or reception, of the Bluetooth signal, for example:

• to confirm detection; and or
• to confirm that the identifier, and/or the timestamp data, are correct.

Then, the device, and in particular the application 106, stores the identifier received in the Bluetooth signal, and the timestamp data, possibly in association with an identifier of the device or an identifier of the user. This stored data can then be communicated to an external device, such as a remote server, preferably through a communication network, preferably wireless.

FIGURE 2 is a schematic representation of another non-limiting embodiment of a system according to the invention.

System 200, shown in FIGURE 2, includes, like system 100 in FIGURE 1, user device 102.

Unlike the system 100 of FIGURE 1, the system 200 includes several Bluetooth beacons 110 ₁ -110 _n instead of a single beacon 110.

The beacons 110 ₁ -110 _i are arranged at different locations on a first site 202. The beacons 110 _i+1 -110 _n are arranged at different locations on a second site 204.

The beacons 110 ₁ -110 _n may have an identical architecture, in particular identical to that of the beacon 110 of FIGURE 1. Each beacon 110 ₁ -110 _n is provided with a manual activation button for said beacon. Each beacon 110 ₁ -110 _n is associated with a location within a site.

Thus, the beacons 110 ₁ -110 _i allow detection of the passage/presence of a user wearing the user device 102 at different locations within the site 202, and the beacons 110 _i+1 -110 _n allow the detection of passage /presence of a user carrying the user device 102 in different locations within the site 204.

The same user wearing the same user device 102 can therefore be detected on different sites, but also at different locations within the same site. This allows for finer detection and tracking of a person.

FIGURE 3 is a schematic representation of another non-limiting exemplary embodiment of a system according to the invention.

System 300, shown in FIGURE 3, includes all elements of system 200 of FIGURE 2, except for the differences described below.

Unlike system 200 of FIGURE 2, system 300 includes several user devices 102 ₁ -102 _m .

The user devices 102 ₁ -102 _m can have an identical architecture, in particular identical to that of the user device 102 of FIGURES 1 and 2.

Each user device 102 ₁ -102 _m is associated with a distinct user. Thus, it is possible, with the system 300, to detect and track several users each carrying a user device assigned to it, on one or more sites.

Of course, multiple user devices can be used as part of system 100 in FIGURE 1.

FIGURE 4 is a schematic representation of another non-limiting embodiment of a system according to the invention.

System 400, shown in FIGURE 4, includes all of the elements of system 300 in FIGURE 3.

The system 400 of FIGURE 4 further comprises a server 402, remote from the sites 202 and 204, with which at least one, in particular each, user device 102 ₁ -102 _m can communicate through a wireless communication network 404.

• un identifiant dudit appareil ou d’un utilisateur portant l’appareil,
• un identifiant d’une balise 110₁-110_ndétectée par ledit appareil, ou un identifiant d’un emplacement de ladite balise détectée, et
• une donnée d’horodatage de détection de ladite balise détectée.

Each user device 102 ₁ -102 _m is configured to communicate to the remote server 402 a so-called detection signal, comprising data relating to:

• an identifier of said device or of a user carrying the device,
• an identifier of a beacon 110 ₁ -110 _n detected by said device, or an identifier of a location of said detected beacon, and
• a detection timestamp data of said detected beacon.

At least one, in particular each, user device 102 ₁ -102 _m can send to the remote server 402 an individual detection signal for each detection of a beacon 110 ₁ -110 _n .

At least one, in particular each, user device 102 ₁ -102 _m can send to the remote server 402 a common detection signal for several beacon detections 110 ₁ -110 _n .

At least one, in particular each, user device 102 ₁ -102 _m can send a detection signal to the remote server 402 immediately after each detection of a beacon 110 ₁ -110 _n .

At least one, in particular each, user device 102 ₁ -102 _m can send to the remote server 402 a detection signal immediately after a detection, or at regular frequency or following a predetermined number of beacon detections.

Of course, the detection signal can include other data than those listed above.

According to an alternative not shown, it is possible to use a remote server to which the user device 102 is connected, in the systems 100 and 200 of FIGURES 1 and 2.

FIGURE 5 is a schematic representation of a non-limiting exemplary embodiment of a method according to the invention.

The method 500, represented in FIGURE 5, can be implemented by a system according to the invention, and in particular by the system 400 of FIGURE 4 for example.

The method 500 includes an optional step 502 during which a user authenticates on a user device assigned/associated to him. To do this, an identifier and a password associated with this identifier are entered by the user. This identifier is stored within the device. This authentication step 502 is optional because the user identifier can be stored in the user device at the factory. According to yet another alternative, an identifier of the device can be stored with an identifier of the user in a database external to the user device, for example on the remote server, for example at the time of the allocation of the device to the user.

Then, when the user carrying the user device wishes to signal his presence at a detection location provided with a Bluetooth beacon, the user approaches said beacon and manually activates said beacon, during a step 504. For To do this, the user presses a beacon activation button, provided at the beacon.

Following activation, during a step 506, the beacon emits a Bluetooth signal comprising either its identifier or an identifier of the location of the beacon. This identifier is previously stored in the beacon. The Bluetooth signal is emitted by the beacon for a relatively short duration, for example about ten seconds. During this period, the beacon can transmit the Bluetooth signal several times, for example in a loop.

The Bluetooth signal emitted by the beacon is detected by the user device carried by the user, during a step 508.

• la détection a bien lieu ; et/ou
• l’identifiant communiqué par la balise est correct.

During an optional step 510, the user device requests confirmation from the user to ensure that:

• detection takes place; and or
• the identifier communicated by the beacon is correct.

During a step 512, the Bluetooth beacon is deactivated by turning off or going into standby. Bluetooth signal transmission is stopped.

• l’identifiant dudit appareil, ou de l’utilisateur ;
• l’identifiant de la balise, ou de l’emplacement de la balise ; et
• optionnellement, mais préférentiellement, au moins une donnée d’horodatage de la détection de la balise, cette donnée d’horodatage étant déterminée par l’appareil utilisateur suite à la détection du signal Bluetooth, par exemple lors de l’une des étapes 508 ou 510.

During an optional step 514, the user device sends a detection signal to a remote server. This detection signal comprises at least:

• the identifier of said device, or of the user;
• the identifier of the beacon, or the location of the beacon; And
• optionally, but preferentially, at least one beacon detection time-stamping data item, this time-stamping data item being determined by the user device following detection of the Bluetooth signal, for example during one of the steps 508 or 510.

Optionally, this data can be stored in the user device.

Steps 504-514 are repeated for each Bluetooth beacon to which the user wishes to report.

Of course, the invention is not limited to the examples detailed above.

Claims (12)

A person detection system (100;200;300;400), comprising:

• at least one user device (102;102 ₁ -102 _m ), each designed to be worn by a user and equipped with a Bluetooth interface for detecting a Bluetooth signal, and
• at least one transmitting Bluetooth beacon (110; 110 ₁ -110 _n ), each designed to be positioned at a detection location and emitting a Bluetooth signal when activated;

characterized in that at least one transmitter Bluetooth beacon (110; 110₁-110_not) can only be activated manually. System (100;200;300;400) according to the preceding claim, characterized in that at least one beacon (110;110 ₁ -110 _n ) comprises a mechanical button (112) for activating said beacon (110;110 ₁ -110 _n ). System according to (100;200;300;400) any one of the preceding claims, characterized in that at least one beacon (110;110 ₁ -110 _n ) is configured to switch off automatically after its activation. System (100; 200; 300; 400) according to any one of the preceding claims, characterized in that at least one beacon (110; 110 ₁ -110 _n ) comprises an on-board electrical power source. System (100;200;300;400) according to any one of the preceding claims, characterized in that at least one beacon (110;110₁-110_not) is configured to emit a Bluetooth signal comprising:

• an identifier of said beacon (110;110 ₁ -110 _n ), and/or
• an identifier of the location of said beacon (110;110 ₁ -110 _n ).

System (100;200;300;400) according to any one of the preceding claims, characterized in that at least one user device (102;102 ₁ -102 _m ) is equipped with a communication interface with a remote server (402), through a communication network (404). System (100;200;300;400) according to any one of the preceding claims, characterized in that at least one user device (102;102₁-102_m) is configured to send, to an external device, a so-called detection signal, comprising any combination of at least one of the following data:

• an identifier of said user device (102;102 ₁ -102 _m ),
• an identifier of the person with whom said user device is associated (102;102 ₁ -102 _m ),
• a time datum of reception of the Bluetooth signal,
• at least one datum transmitted, to said user device (102;102 ₁ -102 _m ), by at least one beacon (110;110 ₁ -110 _n ).

System (100;200;300;400) according to any one of the preceding claims, characterized in that at least one user device (102;102 ₁ -102 _m ) is configured to request manual validation of at least one Bluetooth signal received by said user device (102;102 ₁ -102 _m ), through a user interface (104,106). System (100;200;300;400) according to any one of the preceding claims, characterized in that the user apparatus (102;102₁-102_m) East :

• a Smartphone, or
• a dedicated box;

equipped with a Bluetooth interface. System (200; 300; 400) according to any one of the preceding claims, characterized in that it comprises:

• several user devices (102 ₁ -102 _m ) intended to be worn by separate users; and or
• several beacons (110 ₁ -110 _n ) intended to be arranged in separate locations or at separate locations within the same location.

System (400) according to any one of the preceding claims, characterized in that it further comprises a remote server (402), in communication with at least one user device (102 ₁ -102 _m ) through a network communication (404. Method (500) for detecting people comprising at least one iteration of a detection phase carried out for at least people in at least one location:

• transmission, by a transmitter Bluetooth beacon (110; 110 ₁ -110 _n ) disposed in said location, of a Bluetooth signal, and
• detection of said Bluetooth signal by a user device (102; 102 ₁ -102 _m ), worn by said person;

characterized in that the transmission of the Bluetooth signal by said beacon (110; 110₁-110_not) is conditional on manual activation of said beacon (110; 110₁-110_not).