METHODS AND SYSTEMS FOR ALERT DISSEMINATION IN PREMISES EQUIPPED WITH ELEVATORS

Abstract

A method for disseminating alerts to persons present in premises equipped with elevators (100) comprises retrieving an alert from an alert generation server (20), selecting at least one of the premises located within a geographical area affected by the alert, transmitting the alert to a monitoring system (1, 2) of an elevator in the selected premises, and controlling a loudspeaker (4) of a remote alarm system in the elevator by means of the monitoring system to broadcast the alert message in audio form. Preferably, the elevator car (101) can be controlled by the monitoring system to move and stop successively at several floors, and the alert message is broadcast at each floor while the car is open, so as to be audible to persons located on each floor outside the car. (Shortcut Figure: Figure 1)

Description

Title of the invention: METHOD AND SYSTEMS FOR Disseminating ALERTS FOR PREMISES EQUIPPED WITH ELEVATORS Technical field

[0001] The present description relates to a method and systems for disseminating alerts to people who are present in premises equipped with elevators. Previous technique

[0002] Elevators are very widespread passenger transport systems, which are installed in residential buildings, office buildings, car parks, shopping centers, company premises, train stations, airports, etc. The term elevator refers to the complete system that provides the transport service, including in particular the mobile car, the machinery, the room supplying the electrical power to this machinery, the elevator shaft and its shaft pit, the car roof where onboard components can be installed, etc.Due to regulatory requirements in some countries and / or for safety purposes, each elevator may include emergency call systems located in areas of the elevator where a person, whether an elevator user or a maintenance technician, might be present. These systems allow the person to call for external assistance, such as elevator repair services, emergency services, or other emergency services. Such an emergency call system typically includes a call button, a loudspeaker, a microphone, and a communication system connected to an external network. At least some of the components of each emergency call system often consist of a standard telephone terminal.

[0003] Furthermore, it is known to equip an elevator with a multifunctional supervisory system that performs functions such as controlling and recording elevator operations commanded by users, safety functions, fault diagnostics, monitoring of elevator maintenance operations, etc. Such a supervisory system is notably capable of autonomously controlling the movement of the elevator car and / or the opening of the car door, without a user triggering these actions via the control panel available in the car or via one of the elevator call buttons located on the landings.Furthermore, such an elevator monitoring system may incorporate an additional emergency alarm system beyond the one originally installed in the elevator, and / or a presence sensor to detect a person in the car or elsewhere in the elevator where a maintenance technician might go. Regulations and / or a... Elevator maintenance and support contracts may require that elevator emergency alarm systems be continuously operational, with periodic functional checks.

[0004] Finally, there are alert generation systems, notably operated by public authorities, national or international services, or humanitarian organizations, to disseminate weather alerts, earthquake or tsunami alerts, civil security alerts (including pollution alerts), abduction alerts, terrorist attack alerts, etc., to the public. Nowadays, these alerts are generated by identified servers to which tools for consulting, querying, downloading, retransmitting, and / or disseminating alerts can be interfaced. Alerts can notably be generated using the CAP protocol, for "Common Alerting Protocol," which is an international standard for structured alert formats.The use of the CAP protocol facilitates the relaying of alerts and their dissemination to the population through communication media such as television, radio, mobile terminals, billboards, etc. Technical problem

[0005] From this situation, one aim of the present invention is to improve the efficiency and speed of dissemination of alerts to the population, particularly in premises which are spread over several levels.

[0006] In particular, one object of the invention is to broadcast alerts in premises which may otherwise be poorly served by appropriate means of communication to alert people who are there.

[0007] Another object of the invention is to be able to restrict the dissemination of an alert to premises which are concerned by this alert, without the alert being unnecessarily disseminated in other premises for which it is not relevant. Summary of the invention

[0008] To achieve at least one of these goals or another, a first aspect of the invention proposes a method for disseminating an alert to people who are present in premises equipped with elevators, the method comprising the following steps: / 1 / retrieve an alert from an alert generation server, the alert comprising at least an indication of a geographical area which is concerned by this alert and an alert message to be disseminated; / 2 / from a set of premises, select at least one of the premises which is located in the geographical area concerned by the alert; / 3 / transmit the alert to a monitoring system of an elevator in the selected room, called the recipient elevator; and / 4 / control a loudspeaker of a telealarm system of the recipient elevator, by means of the supervision system of this recipient elevator, to broadcast the alert message in audio form.

[0009] Thus, elevator emergency call systems are used to broadcast alerts. They make it possible to reach people who might be momentarily out of range of other systems or media used to broadcast an alert. The effectiveness of disseminating an alert to the public is therefore increased. Furthermore, the method of the invention makes it possible to select the locations where an alert is broadcast, via the installation address of each elevator and in accordance with the indication of the geographical area concerned by the alert.

[0010] Generally for the invention, the loudspeaker of the telealarm system of the recipient elevator can be located in a cabin, a pit, or a machinery area of ​​this recipient elevator, or on a roof of its cabin.

[0011] In preferred embodiments of the invention in which the loudspeaker of the telealarm system is located in the cabin of the recipient elevator, step / 4 / may include detecting whether a person is present in this cabin, and then, if no person is present, activating the following functions via the supervisory system of the recipient elevator: • at least one movement of the cabin between at least two floors, with a stop and opening of the cabin at each floor, and • while the cabin is stopped and opened successively on each floor, broadcast the alert message at least once using the loudspeaker of the tele-alarm system in this cabin.

[0012] Thus, the method of the invention makes it possible to spread the alert quickly in premises which are spread over several levels, without these levels necessarily being each equipped with a fixed audio broadcasting system.

[0013] For these preferred embodiments of the invention, the monitoring system of the receiving elevator can advantageously adjust the volume for the audio broadcast of the alert message at each stop and opening of the car to a level that is higher than the level prescribed for communication with a person present in the car. Thus, the alert message is audible outside the elevator car, allowing people on each floor at a distance from the elevator to hear the alert message. The number of people who can intelligibly hear the alert message is thereby increased.

[0014] In other preferred embodiments of the invention, the recipient elevator's monitoring system can be configured to: - determine the duration of a user's transport by the destination elevator, or the duration of a stop of a cabin of this destination elevator with the user inside the cabin; - adapt the alert message to be broadcast according to the duration of the transport or stop; and - execute step / 4 / during user transport or cabin stop using the alert message as adapted according to the duration of the transport or stop. Adapting the alert message ensures that the user hears an alert message that is not too long relative to their time in the elevator, or that uses that time to provide the user with optimal information. This makes the alert more effective for that user.

[0015] Also, generally for the invention, the alert retrieved in step / 1 / may further include at least one value of at least one attribute, for example, to indicate an alert category, a population group affected by the alert, an urgency level, a severity level, or a level of certainty of the alert. The alert message may be broadcast in step / 4 / by adapting at least one audio broadcast parameter, for example, a loudspeaker volume level, a number of repetitions of the alert message, an audio broadcast time range, an audio broadcast speed, or at least an audio frequency, according to the attribute value. In this way, the attention of those hearing the alert message may be further enhanced or captured.

[0016] A second aspect of the invention provides a supervision system for an elevator, which is intended to be connected to an elevator control system, and to be further connected to a loudspeaker of a remote alarm system installed in this elevator, this supervision system being configured to: - receive an alert including an alert message to be broadcast; and . - control the speaker of the tele-alarm system to broadcast the alert message in audio form.

[0017] Such a supervisory system for elevators can be used to implement a method which conforms to the first aspect of the invention, including its optional improvements.

[0018] This elevator monitoring system may optionally include a presence sensor designed to be installed in an elevator car and adapted to detect a person present in the car. The monitoring system can then be further configured to activate the following functions if no person is detected in the car: • at least one movement of the cabin between at least two floors, with a stop and opening of the cabin at each of these floors, and • while the cabin is stopped and opened successively on each floor, broadcast the alert message at least once using the loudspeaker of the tele-alarm system in this cabin.

[0019] Possibly, the telealarm system including the loudspeaker can advantageously be integrated into the supervision system, in particular to eliminate difficulties of connection or interfacing between the supervision system and a telealarm system specific to the elevator, and also to avoid maintenance of the telealarm system and the supervision system being separate.

[0020] Optionally but advantageously, the monitoring system can be further configured to adapt at least one audio broadcasting parameter used to broadcast the alert message, for example, a loudspeaker volume level, a number of repetitions of the alert message, an audio broadcasting time range, an audio broadcasting speed, or at least an audio frequency, based on a value of at least one attribute included in the received alert, for example, an attribute that indicates an alert category, a class of affected population, an emergency level, a severity level, or a level of certainty of the alert.

[0021] Finally, a third aspect of the invention proposes a system for disseminating an alert to people present in premises equipped with elevators, the dissemination system comprising: - respective monitoring systems installed in the elevators, each monitoring system conforming to the second aspect of the invention; and - an elevator management server, configured for: • Retrieve the alert, which must include at least an indication of the geographical area affected by the alert and an alert message to be disseminated. • select at least one of the premises that is located in the geographical area affected by the alert, and • transmit the alert to the elevator monitoring system of the selected room.

[0022] Such an alert dissemination system is adapted to implement a method that conforms to the first aspect of the invention, including its optional improvements. Brief description of the figures

[0023] The features and advantages of the present invention will become more apparent from the following detailed description of non-limiting implementation examples, with reference to the accompanying figures, among which:

[0024] [Fig. 1] is a block diagram of an alert dissemination system according to the invention; and

[0025] [Fig.2] shows steps of an alert dissemination process that can be executed by the system of [Fig.l]. Detailed description of the invention

[0026] In [Fig. 1], reference numeral 20 designates one or more alert generation servers that make alerts available to warn populations concerned by imminent risks or to solicit witness statements. The alert generation server(s) 20 may be national or international. For example, each alert generation server 20 may be administered by the IFRC (International Federation of Red Cross Societies), or by the Météo France service designated as "VigiMétéo," or by alert services such as Alert-Hub, FR-Alert in France, EU-Alert in Europe, Amber Alert, etc. Some alert generation servers may be dedicated to a specific type of alert, such as weather alerts, civil protection alerts, abduction alerts, etc.The alert generation server(s) 20 is / are designed to transmit alerts over a communication network in the form of RSS feeds, API interface feeds, FTP queries, or other methods, including as XML files. Specifically, but not limited to, each alert may be structured according to the CAP protocol. In particular, each alert may contain the following elements: an alert period, during which the alert is to be disseminated, for example in the form of a start date and time and an end date and time, an indication of a geographical area that is affected by the alert, for example in the form of geolocation coordinates, such as GPS, Galileo or other, alert attributes, such as an alert category attribute contained in a field <category>, a population class attribute that is affected by the alert, an emergency attribute contained in a field <urgency>, a severity attribute contained in a field <severity>or a certainty attribute contained in a field <certainty>, And an alert message, which is the useful content of the alert to be disseminated. For example, different categories of alerts include weather alerts, earthquake or tsunami alerts, civil security alerts, alerts for terrorist attacks or kidnappings, etc. Different population groups affected by an alert may correspond to a public alert, which is intended for the entire population, or a private alert, which is intended for one or more identified persons, a restricted alert, which is intended for a group of people designated collectively, etc.

[0027] A provider of elevator supervision and monitoring services proposes to equip each elevator with a supervision system that performs functions such as verifying the operating status of the elevator and its power supply, verifying the elevator's safety systems, verifying and recording for historical purposes operating commands entered by users and the execution of these commands, verifying the planning and execution of maintenance operations, etc. Each supervision system may include a fixed control unit 1, an on-board unit 2 located in the elevator car 101 or on its roof, and optionally one or more detector(s) 3 located in the car 101.The onboard unit 2 is connected to the fixed control unit 1 either by wire or short-range radio to enable communication between the two units. The fixed control unit 1 is designed to be located in a technical room of the elevator 100. It interfaces, on the one hand, with the elevator 100's power supply and control system 102 to collect elevator operating and diagnostic signals, and on the other hand, with the elevator 100's call buttons 104, which are located on the various floor landings. This fixed control unit 1 allows, in particular, the triggering and execution of elevator 100 functions, such as moving the car 101 between floors, stopping the car 101 at floors designated by this fixed control unit 1, and opening the car 101 door.Unit 2, which is installed in or on the cabin 101 of elevator 100, is interfaced with the command input panel 103 located in this cabin, specifically to transmit, for recording purposes, the commands entered on this panel by the users of elevator 100. The on-board unit 2 can also be interfaced with the detector(s) 3 of the supervisory system located in the cabin 101, specifically to collect measurement and / or detection signals produced by each detector 3. For example, one of these detectors 3 could be a presence detector, to detect the presence of at least one person in the cabin 101. Other possible detectors include a smoke detector, a fire detector, etc.

[0028] By regulatory requirement and / or for safety purposes, the cabin 101 is equipped with a remote alarm system that allows a person present in the cabin to call an assistance service, for example, such a service from the elevator manufacturer 100 or a public assistance service such as the fire department. Such a remote alarm system usually includes a help button located on the control input panel 103, a microphone, a loudspeaker 4, and a telephone communication system. For the invention, the on-board unit 2 is connected to speaker 4 of this emergency alarm system and configured to take control of it. The monitoring system with which elevator 100 is equipped may also include an additional emergency alarm system. In this case, the onboard unit 2 is connected to a speaker of this additional emergency alarm system, which is positioned to emit audio signals inside the car 101. Hereafter, reference 4 designates a speaker located inside the car 101, which may belong to either an emergency alarm system originally supplied with elevator 100 or to an emergency alarm system integrated into the monitoring system with which elevator 100 is equipped.

[0029] The alert dissemination system comprises an elevator management server 10 and a set of elevator monitoring systems, each as described above, each monitoring system equipping a different elevator. The management server 10 is connected to a database 11 that lists a set of monitoring systems installed on a fleet of elevators 100. For example, each monitoring system can be identified in the database 11 by the GPS coordinates of the installation location of its elevator 100. The fixed control unit 1 of each monitoring system is connected to the management server 10 via a communication network, for example, a 4G or 5G network using an IP protocol, and the management server 10 is connected to the alert generation server(s) 20, possibly also via this same communication network. Optionally, the management server 10 may consist of several interconnected servers.

[0030] One operation of this alert dissemination system is now described with reference to [Fig.2].

[0031] Step S0, which is carried out by the elevator management server 10, consists of monitoring the generation of a new alert by one of the servers 20. For this purpose, the management server 10 can periodically query each alert generation server 20. When a new alert has been generated, it is transmitted in response to the management server 10, for example in the form of an XML file via RSS feed, and in CAP format.

[0032] At the SI stage, the management server 10 retrieves the file of the new alert and, upon receiving the alert file as transmitted by the alert generation server 20, it reads in this file the indication of the geographical area which is concerned by the alert.

[0033] In step S2, the management server 10 accesses the database 11 to select the monitoring systems that are installed in the geographical area of ​​the alert, for example by using their GPS coordinates. The elevators 100 of the monitoring systems that have been selected in this way for the alert being processed have been called recipient elevators in the general part of The description. Possibly, the selection of the monitoring systems affected by the alert can be performed by the management server 10 using an artificial intelligence circuit, for example, to improve or modify a result of the geographical selection. The management server 10 then transmits the alert to each of the selected monitoring systems.

[0034] In step S3, the fixed control unit 1 of each selected supervisory system receives the alert, for example, the XML file of this alert. The remainder of the alert dissemination process is executed separately within each of the selected supervisory systems.

[0035] In step S4, the fixed control unit 1 reads the alert period, its optional attributes, and the alert message. If the alert period has not yet expired, the fixed control unit 1 generates a speech synthesis corresponding to the alert message and creates an audio file containing this speech synthesis. The format of this audio file can be one of those commonly used, depending on the desired level of compression. Certain characteristics of the speech synthesis performed by the fixed control unit 1 can be adjusted according to the values ​​of the alert attributes. For example, the audio frequency, the loudspeaker volume level, the audio playback speed, the number of repetitions of the alert audio message, or the speech synthesis language can be determined based on the attribute values, particularly to more effectively capture the attention of the intended recipients of the alert.

[0036] In step S5, the fixed control unit 1 verifies that the alert period is in progress. If so, this fixed control unit 1 commands the execution of the following steps S6 and S7, or otherwise terminates the alert dissemination process that is being processed. Monitoring for a possible new alert continues according to step S0. Possibly, if the alert contains an indication of an audio dissemination time range, such as, for example, a morning, afternoon, or daytime time range, the fixed control unit 1 verifies that the current time is within this time range and proceeds with steps S6 and S7 only if it is; otherwise, it suspends the execution of the alert dissemination process until the time falls within the indicated time range.

[0037] At step S6, the fixed control unit 1 commands the elevator 100 to bring the cabin 101 to a floor for the start of the alert broadcast, for example to a ground floor, and commands the door of the cabin 101 to be opened once it has stopped at the desired floor.

[0038] Then, at step S7, the audio file is played through the loudspeaker 4 under the control of the fixed unit 1, at a sound level sufficient to be audible outside cabin 101 at a distance from elevator 100. For this purpose, the sound volume level which was selected by the fixed control unit 1 at step S4 for the speaker 4 may be higher than that of an operation of the telealarm system intended for a user of the elevator 100 who is in the cabin 101. During the stop of the cabin 101 at the current floor with its door open, the audio message may be repeated several times according to the repetition prescription which was determined by the fixed control unit 1.

[0039] The fixed control unit 1 then commands the closing of the cabin door 101, and a repetition of steps S5, S6, and S7 on a different floor. All floors can thus be addressed successively, or a selection thereof, allowing the alert message to be effectively disseminated to all levels of the building where elevator 100 is located.

[0040] According to a first optional improvement of the invention, each execution of steps S6 and S7 can be subject to the condition that no person is present in cabin 101 at the time step S6 is started. To this end, the detection signal delivered by the presence detector 3 is checked by the fixed control unit 1 before triggering a new execution of step S6.

[0041] According to a second optional improvement of the invention, the processing of commands entered by users of elevator 100 on the panel 103 or on the elevator call buttons on the landings 104 can be inhibited by the fixed control unit 1, in order to broadcast the alert by executing steps S6 and S7 with priority over the transport service for these users. Alternatively, the execution of steps S6 and S7 can, on the contrary, be suspended if a command is entered by a user of elevator 100, and the transport of this user is carried out with priority. Possibly, the alert message can still be broadcast during this transport of the user, with a volume level that is reduced to be suitable for the user present in the car 101.The repetition of steps S5, S6 and S7 can then be resumed automatically if no new command is entered on panel 103 or by the elevator call buttons on floor landings 104.

[0042] In a variant of the alert dissemination method that also conforms to the invention, the alert message broadcast by the loudspeaker 4 of the tele-alarm system in cabin 101 is intended for a user who is present in that cabin. The alert message to be broadcast can then be adapted to the duration of the user's presence in cabin 101. This duration of presence can be determined in advance by the fixed control unit 1 based on the floor level at which the user entered their transport command on panel 103, and the arrival floor level indicated by that command. Alternatively, the duration of the user's presence in cabin 101 can be identified by the fixed control unit 1 as the duration of the cabin's stop at a floor level with the user remaining in the cabin. Then, Fixed control unit 1 can adapt the alert message to be broadcast based on the user's length of stay in cabin 101, for example, by using an artificial intelligence content generation circuit. This adaptation of the alert message adjusts its length to the user's duration in cabin 101. The speech synthesis is then generated by fixed control unit 1 from the alert message as adapted to the user's stay, and this audio file is then broadcast via speaker 4 while the user is in cabin 101. The broadcast message thus ends approximately when the user leaves cabin 101, having optimized the alert information heard by the user.

[0043] Although the invention has been described for broadcasting an alert using a loudspeaker for a tele-alarm system located in the car 101, the alert can be broadcast by means of the other tele-alarm systems that equip each elevator 100, each of which has its own loudspeaker separate from that of the other tele-alarm systems within the same elevator. Thus, the alarm can be broadcast audibly independently in the shaft of the elevator 100, also called the pit, on the roof of the car 101, or in a room of its machinery or its power and control system 102. For each of these additional areas, the audio broadcast of the alert can again be subject to the detection of a person in the area concerned, by a dedicated presence sensor that is installed for that area.

[0044] It is understood that the invention can be reproduced by modifying secondary aspects of the embodiments described in detail above, while retaining at least some of the advantages mentioned. In particular, certain steps described as being performed by the elevator management server 10 can be performed alternatively by the fixed control units 1, and vice versa. Specifically, the speech synthesis audio file containing the alert message can be generated by the management server 10 or by a dedicated server and then sent to the fixed control units 1 of the recipient elevators.< / certainty> < / severity> < / urgency> < / category>

Claims

Demands

1. A method for disseminating an alert to persons who are present in premises equipped with elevators (100), the method comprising the following steps: / 1 / retrieving an alert from an alert generation server (20), the alert including at least an indication of a geographical area which is concerned by said alert and an alert message to be disseminated; / 2 / from a set of premises, selecting at least one of the premises which is located in the geographical area concerned by the alert; / 3 / transmitting the alert to a monitoring system (1, 2) of an elevator (100) in the selected premises, referred to as the recipient elevator; and / 4 / controlling a loudspeaker (4) of a remote alarm system of the recipient elevator (100), by means of the monitoring system (1, 2) of said recipient elevator, to disseminate the alert message in audio form.

2. A method for broadcasting an alert according to claim 1, wherein the loudspeaker (4) of the remote alarm system of the recipient elevator (100) is located in a cabin (101), a pit, or a machinery area of ​​said recipient elevator, or on a cabin roof of said recipient elevator.

3. A method for broadcasting an alert according to claim 1 or 2, wherein the loudspeaker (4) of the remote alarm system is located in a car (101) of the recipient elevator (100), and wherein step 4 comprises detecting whether a person is present in the car (101), and then, if no person is present in the car, activating the following functions via the supervisory system (1, 2) of the recipient elevator: • at least one movement of the car (101) between at least two floors with a stop and an opening of the car at each of said floors, and • while the car (101) is stopped and opened successively at each floor, broadcasting the alert message at least once. using the speaker (4) of the tele-alarm system in said cabin.

4. A method of disseminating an alert according to claim 3, wherein the supervisory system (1, 2) of the recipient elevator (4) adjusts a sound volume for the audio dissemination of the alert message at each stop and opening of the cabin (101), to a level that is higher than a level prescribed for communication with a person present in said cabin.

5. A method for disseminating an alert according to claim 1 or 2, wherein the supervisory system (1, 2) of the recipient elevator (100) is configured to: - determine a duration of a user's transport by the recipient elevator (100), or a duration of a stop of a car (101) of said recipient elevator with the user inside the car; - adapt the alert message to be disseminated according to the duration of the transport or stop; and - execute step / 4 / during the user's transport or the car (101) stop using the alert message as adapted according to the duration of the transport or stop.

6. A method of disseminating an alert according to any one of the preceding claims, wherein the alert retrieved in step / 1 / further includes at least one value of at least one attribute, for example to indicate a category of the alert, a class of population concerned, a level of urgency, a level of severity or a level of certainty of the alert, and wherein the alert message is disseminated in step / 4 / by adapting at least one audio dissemination parameter, for example a loudspeaker volume level (4), a number of repetitions of the alert message, an audio dissemination time range, an audio dissemination speed or at least an audio frequency, according to the value of the attribute.

7. Supervisory system (1, 2) for an elevator (100), intended to be connected to an elevator control system, and further to be connected to a loudspeaker (4) of a remote alarm system installed in said elevator, the supervisory system being configured to: - receive an alert including an alert message to be broadcast; and - control the loudspeaker (4) of the remote alarm system to broadcast the alert message in audio form.

8. Supervisory system (1, 2) for an elevator (100) according to claim 7, further comprising a presence sensor (3) for installation in an elevator car (101) and adapted to detect a person present in the car, and wherein the supervisory system (1, 2) is further configured to activate the following functions if no person is detected in the car (101): • at least one movement of the car (101) between at least two floors with a stop and an opening of the car at each of said floors, and • while the car (101) is stopped and opened successively at each floor, broadcast at least once the alert message using the loudspeaker (4) of the tele-alarm system in said car.

9. Supervisory system (1, 2) for an elevator (101) according to claim 7 or 8, wherein the remote alarm system including the loudspeaker (4) is integrated into the supervisory system.

10. Supervisory system (1, 2) for an elevator (100) according to any one of claims 7 to 9, wherein the supervisory system is further configured to adapt at least one audio broadcasting parameter used to broadcast the alert message, for example a loudspeaker (4) volume level, a number of repetitions of the alert message, an audio broadcasting time range, an audio broadcasting speed or at least an audio frequency, according to a value of at least one attribute included in the received alert, for example an attribute that indicates an alert category, a class of affected population, an urgency level, a severity level or a level of certainty of said alert.

11. A system for disseminating (1,2) an alert to persons present in premises equipped with elevators (100), the dissemination system comprising: - respective monitoring systems (1,2) installed in the elevators (100), each monitoring system conforming to one of claims 7 to 10; and - an elevator management server (10), configured to: • retrieve the alert including at least an indication of a geographical area which is concerned by said alert and an alert message to be disseminated, • select at least one of the premises that is located in the geographical area affected by the alert, and • transmit the alert to the supervision system (1, 2) of the elevator (100) of the selected room.

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