EP3697711A1

EP3697711A1 - Method for monitoring a lift car

Info

Publication number: EP3697711A1
Application number: EP18795950.7A
Authority: EP
Inventors: Johannes Schober; Andreas Hannes SCHULER; Daniel WILFING; Oliver Krauss
Original assignee: View Promotion GmbH
Current assignee: View Promotion GmbH
Priority date: 2017-10-17
Filing date: 2018-10-16
Publication date: 2020-08-26
Also published as: AT520568A1; WO2019076916A1

Abstract

The invention relates to a method for monitoring a lift car (3) in a lift system by means of at least one sensor (9), wherein the at least one sensor (9) captures sensor data in the lift car (3), the sensor data are transmitted to an evaluation device arranged in the lift car (3), and the evaluation device communicates with at least one server via a communication network. In order to allow easy adaptation of the monitoring process to the area of application or the usage location of the lift system, the invention proposes the following steps for identifying an event in the lift car (3): - evaluating the captured sensor data and identifying a current event in the lift car (3) using an algorithm stored in the evaluation device; generating an event identification message assigned to the current event; - comparing the event identification message with an event database assigned to the lift car (3), the current event being identified as a safety-relevant event if the event identification message and an entry in the event database correspond; - triggering an alarm procedure if a safety-relevant event has been identified.

Description

METHOD FOR MONITORING AN ELEVATOR CABIN

FIELD OF THE INVENTION The invention relates to a method for monitoring an elevator cage in an elevator installation by means of at least one sensor, wherein the at least one sensor detects sensor data in the elevator cage, wherein the sensor data are arranged via a first data connection to an elevator cage

Evaluation be transmitted, the

Evaluation device via at least a first

Communication network with at least one server

communicates. STATE OF THE ART

As is generally known, an elevator installation is used to transport objects, namely persons and / or persons

Objects, between different floors of a building and is attributable to the technical field of discontinuous conveyor. For this purpose, an elevator installation may comprise one or more elevator cars, in the interior of which

Passengers or objects are transported. As a rule, elevator cars have an elevator door, which is used to get in or out of a person or to load or unload one

Item is open and closed during the movement between the floors. In a building, several elevator systems can be provided, which have different applications.

The need to monitor the interior of a

Elevator car is made for safety reasons

Passengers as an elevator car when closed

Elevator door forms a closed system, which is not visible from the outside. If an event occurs which is not part of normal operation,

For example, a case of illness of a passenger, a conspicuous behavior of a passenger or a

Shaking, this event can be monitored the elevator car can be detected by means of at least one sensor and corresponding steps are set. In the past, for this purpose, for example, cameras connected to a surveillance room were installed in the elevator car, which transmitted the captured images to a surveillance room for monitoring by a lift elevator.

However, more modern methods provide an automated evaluation of the sensor data of the elevator car. So revealed

For example, US 2015/0114763 AI a method by which the inhabitants of a building are detected and the sensor-based monitoring of the elevator car foreign

People in the building are detected. For this purpose, the sensor data recorded in the elevator car are continuously transmitted to a server, in which the sensor data are compared with the recorded data of the residents in order to recognize foreign persons. If a foreign person is detected, a security level is increased and, if necessary, the

Task forces alerted.

Two disadvantages of the prior art are apparent: On the one hand, the transmission of the entire sensor data from a monitoring device of the elevator car to the server is extremely data-intensive, in particular when the sensor detects image data or video data. Especially when the communication between the monitoring device and the server via a first communication network, the server is therefore not located in the same building as the elevator system, so can data volumes in the amount of several gigabytes per

Elevator cabin are generated per hour, which must be evaluated on the server and cached. However, this requires a complex and expensive, especially if several elevator cars are monitored at the same time

Server infrastructure.

Another disadvantage of the prior art can be seen in the fact that the described method is only used in residential buildings and difficult or impossible for Other applications can be adapted, since an individual recognition of persons is necessary.

OBJECT OF THE INVENTION

It is therefore an object of the invention to overcome the disadvantages of the prior art and a method for

To suggest monitoring of an elevator car, which is fully functional with a reduced server capacity. Another object is seen in a simple

To allow adjustment of the monitoring process to the application or the place of use of the elevator installation.

PRESENTATION OF THE INVENTION

This object is achieved in a method according to the invention for monitoring an elevator car in an elevator installation by means of at least one sensor in that the

Identification of a safety-relevant event in the elevator car following steps are performed:

Evaluating the detected sensor data and identifying a current event in the elevator car with at least one stored in the evaluation algorithm;

Generate an associated with the current event

Event identification message;

Comparing the event identification message with an event database associated with the elevator car, wherein the current event is identified as an event sensitive to the elevator car when the event identification message and an event database entry match;

Triggering an alerting procedure by the at least one server if a security-relevant event

was identified.

The simplification of the server structure is on the one hand achieved in that the evaluation of the sensor data is done locally in the evaluation and not centrally on the at least one server. Thus, the amount of data to be transmitted can be significantly reduced.

The adaptability of the monitoring procedure to different places of work is achieved by a two - stage procedure, whereby in a first step the algorithm of the

The evaluation device uses the sensor data to recognize events that are potentially relevant to safety, irrespective of which event is responsible for the particular location of the application

Elevator system is actually safety-relevant and for which an alarming procedure must be triggered.

For example, such events may be one of those mentioned in the following non-exhaustive list: fainting, left behind object, fire, conspicuous behavior of a person, severe pollution in the elevator car, no opening of the elevator door, failure of the elevator lighting, severe soiling of the elevator car, Vandalism in the elevator car. The sensor data sent over the first data connection to the

Evaluation device can be transmitted, may comprise a single measured value of a sensor or may comprise a plurality of measurable by means of a sensor measured values. The same applies to two, three or more sensors. It is also conceivable that raw data, such as image data or audio data, are transmitted as sensor data to the evaluation device, wherein the

Evaluation device, the raw data by means of a

Evaluation algorithm evaluates. The evaluation algorithm can, for example, compare image data with

provide at least one reference image or a comparison of audio data with an audio database.

The evaluated sensor data can be a

Identification algorithm by means of a so-called feature vector, which contains various entries for the recorded and optionally pre-evaluated sensor data,

For example, temperature, number of objects in the

Elevator cabin, smoke, are fed, including the

Generation of a feature vector considered as evaluation becomes. Different concepts come into question for the identification algorithm: It can be

For example, it may be a machine-learning method, such as a neural network or a support vector machine, which itself runs on the basis of reference data

improved without having to specify specific thresholds. On the other hand, a decision tree method is conceivable, the machine learning on

Reference data based. Instead, the

Identification algorithm can also be built rule-based by means of a decision tree or a decision matrix to events also by reaching, exceeding or falling below concrete, predefined

Detect thresholds. A state-machine-based identification algorithm is also conceivable according to which a change of the evaluated sensor data identifies an event.

By means of the identification algorithm, it is therefore possible on the basis of the detected sensor data to detect a current event in the elevator car and to identify which event has occurred. Preferably, the

defined identifiable events, but can be updated via the at least one server or

be extended. Accordingly, an event identification message is generated, by which the

Information about the occurrence of the current event is forwarded to a next level. In this level, it is checked whether the current event for the concrete, monitored elevator car is actually a

represents a security event, so a

Alarming procedure must be triggered or whether the location of the elevator car, the current event requires no concrete measures. For example, a

left behind object in a safety-sensitive environment, such as an airport, the understanding of the

Security service, while in a residential or office building there is no need for it. For this purpose, one of the monitored elevator car

associated event database provided in which

is defined, which actually identified by the at least one algorithm current event is actually a security-relevant event for the specific elevator car and therefore the triggering of an alerting procedure is necessary. The entries of the event database function in others

Words expressed as a filter, which determines for each elevator car, which current event triggers an alerting procedure. In the simplest case, an alarming procedure comprises the submission of a message to a responsible hotline, wherein the output of information in the elevator cabin is also conceivable.

The term "safety-relevant events" in the context of the invention means those events which are intended to trigger an alarming procedure. It can also be events such as heavy pollution or vandalism. The term "event database" should not only be understood to mean a database in the narrower sense, but may rather be a list, a table or a data set which have corresponding entries which, when compared with the event identification Message at least allow a yes / no decision if one

Alarming procedure to be triggered. On the one hand, the comparison on the one hand can be a check as to whether the event database has a corresponding entry for the event identification message at all or

on the other hand, to check whether an event database entry associated with the event identification message indicates the triggering of an alerting procedure. Accordingly, a comparison of the generated event identification message with the event database takes place to ensure that the alerting procedure is triggered only if this is intended for the specific elevator car. Due to the two-stage procedure, ie recording a current event and checking whether the current event is one for the elevator car

can be the same

Evaluation unit with the implemented at least one

Algorithm in a variety of different

Application areas or at various locations

located elevator cabins are used without the at least one algorithm of the evaluation must be modified because of the field of application or location

dependent security relevant events, which one

Alerting procedure in which event database can be defined in a simple manner. In principle, it is conceivable that the event database is likewise integrated in the evaluation device and that the communication with the server takes place only when the alarming procedure is triggered. In one embodiment variant of the method according to the invention, it is provided that the event identification message from the evaluation device to the at least one server

is transmitted, the elevator car associated with the event database is deposited on at least one server and the comparison of event identification message and event database is performed on the at least one server. As a result, on the one hand, the volume of the transmitted data between the evaluation device and the at least one server is reduced because only the event identification message is transmitted. On the other hand, it is centrally located on the

at least one server stored event database particularly user-friendly adaptable, since no direct

Access to the evaluation device is necessary. However, thus, in a simple manner, an interface between the provider of the system and the users of the system

which provides user-optimized access to the system in order to be able to adapt the triggering of an alerting procedure to the needs of the users. A further embodiment variant provides that the event identification message contains the sensor data underlying the identification of the current event. By means of the transmitted sensor data, the function of the at least one algorithm of the evaluation device can be checked and, if appropriate, an adaptation of the confidence intervals for a specific elevator car can be carried out. It is also conceivable that the transmitted sensor data are matched with corresponding data of the event database in order to

decide if an alerting procedure is triggered or not. It is particularly advantageous if the transmitted with the event identification message sensor data are stored on the at least one server to the

To evaluate sensor data, for example, statistically, and to avoid future misdetections.

Particularly advantageous is the use of the method according to the invention for several elevator cars of an elevator installation or for several elevator cars of different ones

Elevator systems. In this case, the at least one server acts as the central interface via which the

Alarmierungsprozeduren different elevator cars can be processed centrally. Because the event database is stored on the at least one server, anyone can communicate with the at least one server

Evaluation of an elevator car to be assigned its own event database. Similarly, it is also possible for a group of elevator cars, all of which are operated in the same field of operation and therefore the same events are classified as safety-relevant, to assign a common event database. It goes without saying that a data construct can also contain several event databases for different elevator cars or for different groups. So can

For example, a building complex to a first group

Have elevator cars, for which left behind

Objects are safety relevant (such as passenger lifts), and a second group of elevator cars, about

Personnel lifts for which this event does not matter plays. Therefore, in a particularly preferred

Embodiment variant of the invention provided that each elevator car is associated with an event database and / or that several elevator cars are grouped together and each group of elevator cars is assigned an event database.

While it is basically conceivable to trigger and execute the same alarming procedure for each detected security-relevant event, for example the

Notification of a Liftwart, it is special

advantageous if, for each safety-relevant event, an alarming procedure tailored to this is triggered. Therefore, in a further embodiment of the invention, it is provided that in the event database for each

security event at least one

Alarmierungsprozedur is deposited. It is also conceivable to define different processes within an alerting procedure, which are processed with different priority.

To make sure about the triggered

Alert procedure safety, emergency or emergency services can get to the location of the security-related event is provided in a further preferred embodiment of the invention that the elevator car associated location data are stored on the at least one server and the location data in the context of triggered

Alarmierungsprozedur be transmitted. The location data may be, for example, an address, GPS coordinates and / or a map of a building.

According to the invention, the alerting procedure can have at least one of the following steps, preferably several steps are carried out in succession:

Establishing a communication connection between the at least one server and an emergency call center via the first communication network or another communication network; The emergency call center can be, for example, a call emergency station for emergency services, such as the police, fire brigade or rescue, or else a security service provided for monitoring the elevator installation. Such an alarming procedure is particularly useful in events such as powerlessness, fire or physical attacks.

Establishing a communication link between the at least one server and a maintenance center via the first communication network or another communication network; A maintenance center can be notified, in particular, if a technical defect in the elevator car has been detected, for example with regard to

Illumination of the elevator car or the opening of the elevator door or severe contamination of the elevator car or

Vandalism.

Transmission of information to the evaluation device; For example, information on one in the

Lift cabin arranged display device can be displayed or output via a speaker. It is also conceivable that the evaluation device is tested or updated by the transmitted information.

Establishing a communication connection between the at least one server and a smartphone app via the first communication network or another communication network.

For example, so close to the elevator car

security forces or maintenance personnel are alerted via the app and directed to the appropriate elevator car. A particularly high density of information can be achieved in that the at least one sensor comprises at least one optical sensor, in particular a preferably controllable and / or digitally evaluable video camera, a depth camera or a thermal camera, and the sensor data as

Image data are analyzed by means of image analysis. By evaluating the image data, the number of persons located in the elevator car, the opening state of the elevator doors or the position of the

Persons are detected within the elevator car. Likewise, this can cause severe pollution of the

Elevator car or vandalism can be detected. For this purpose, the image analysis may include a comparison with at least one reference image. Preferably, one is

Video camera and a depth camera provided, the

Depth camera an infrared laser projector and a

includes monochromatic CMOS sensor.

To various events by means of at least one

Sensors, preferably in addition to the at least one

optical sensor to identify in a simple manner is in a further embodiment of the

Invention provided that the at least one sensor comprises a smoke sensor and / or a temperature sensor and / or an acoustic sensor, in particular a microphone, and / or an acceleration sensor and / or a moisture sensor and / or an ultrasonic sensor. The smoke sensor and the temperature sensor can, for example, for

Fire detection can be used, the acoustic sensor can detect, for example, abnormal sounds such as screams, while by means of the moisture sensor, for example, a penetration of liquid is detectable.

Ultrasonic sensors can contribute to the detection of objects in precarious lighting conditions, for example.

In order to be able to make contact within the context of the alarming procedure with persons located in the pullout cabin, in a further preferred embodiment variant of the invention it is provided that the elevator cab has a display unit and / or an audio transmission unit and the

Alerting procedure includes at least one of the following steps:

Make a video connection between the

Display unit and the at least one server or between the display unit and an emergency call center;

Establishing an audio connection between the audio transmission unit and the at least one server or between the audio transmission unit and a

Emergency call center. It goes without saying that it is also possible to connect to a maintenance center. It is also conceivable that the communication with the emergency call center or the maintenance center takes place via the at least one server.

As a compact and modular system by means of which the above-mentioned objects are achieved and equipped by which elevator cars of different manufacturers or

can be retrofitted, according to a further aspect of the invention, a monitoring device for a

Elevator cabin with an evaluation device, at least one sensor for detecting sensor data and a

Communication device for communicating with at least one server via a first communication network

proposed, which is designed for carrying out the method according to the invention. In an operating state, the monitoring device is installed in an elevator car.

BRIEF DESCRIPTION OF THE FIGURES

The invention will now be explained in more detail with reference to an embodiment. The drawings are exemplary and are intended to set forth the inventive idea, but under no circumstances

narrow down or even finish playing.

Showing:

Figure 1 is a schematic representation of an elevator car with a monitoring device.

Fig. 2 shows an embodiment of a system with several

Monitoring devices.

WAYS FOR CARRYING OUT THE INVENTION

1 shows an elevator car 3 of an elevator installation, which is located in an elevator shaft. The vertical movement of the elevator car 3 takes place by means of a with a

Drive unit connected support rope 10, which cooperates with a counterweight 11. The elevator car 3 is by means an elevator door 5 closed, which can open in at least two floors to the inlet and outlet of

Objects, in particular of persons and objects to allow.

In the interior of the elevator car 3 is a

Monitoring device 4 is mounted, which comprises an optical sensor 9, by means of which the elevator car. 3

can be monitored.

FIG. 2 shows a system with two monitoring devices 4, which are in communication communication with two servers 1 via a communication network 2. Every one of them is

Monitoring devices 4 in a different

Elevator car 3 is arranged. In the communication network 2 also by one or more of the following known

Network solutions are represented: Internet, mobile network, a hub, switch, router, wireless router, CAN controller or mobile solutions such as GSM, GPRS, EDGE, UMTS, HSPA, LTE, WiMAX, LTE-Advanced or a 5G connection or others

Network solutions.

The monitoring device 4 comprises in the present embodiment, the optical sensor 9 and at least one further sensor 8, which detect both sensor data.

The further sensor 8 may be, for example, a smoke sensor and / or a temperature sensor and / or an acoustic sensor, in particular a microphone, and / or an acceleration sensor and / or a moisture sensor and / or an ultrasonic sensor. Depending on which event is to be detected in the elevator car 3, a single sensor 8, 9 or a combination of two or more sensors 8, 9 may be advantageous. The sensors 8, 9 are connected via a first data connection to an evaluation device 6, in which the

Sensor data are evaluated. The first data connection can be, for example, a serial interface, such as USB, RS232 or RS485 or a parallel interface such as PCI or IEEE 1284. Even a CAN bus as a data connection is conceivable.

The evaluation device 6 may be, for example, a microcomputer or an (industrial) PC, which on the one hand can receive sensor data and, on the other hand, at least one algorithm, preferably one

Evaluation algorithm and an identification algorithm, can save. In addition, the evaluation device 6 can transmit data and information via the communication network to the server 1 (or the servers 1) and receive information and data from the server 1. Alternatively, an independent communication device may be provided.

Likewise, the evaluation device 6 is used for the processing and evaluation of the sensor data and for the identification of a current event in the elevator car 3, which differs from the regular operating state.

In addition, the monitoring unit 4 has a

Display device 7, on which information can be displayed. Likewise, it is also conceivable that a video transmission by means of the optical sensor 9 and the

Display device 7 is produced. The

Display device 7 is electronically controllable and may be e.g. a LCD, Plasma, FED, TFT, CRT, OLED, SED, Fall Leaf Display, Nixie Tube, Brown Tube, Matrix Display (LED, OLED, VFD, Incandescent), Video Projector (Eidophor, Tubes, LCD, DLP, LED, LCoS, Laser ), but is not limited to these embodiments.

To make an audio connection can also be an unrepresented audio transmission unit in the

Monitoring device 4 may be integrated, which includes a microphone and a speaker. If one of the sensors 8 is designed as a microphone, this can be used for the audio

Connection can be used.

Based on one of the monitoring devices 4, the method according to the invention for monitoring the elevator car 3 will now be described be explained. Although the compact and modular structure of the monitoring device 4 is advantageous, it is not absolutely necessary for the method of operation of the method to incorporate all elements which are essential to the function in one unit. Rather, the sensors 8,9 and the evaluation device 6 and optionally the display device 7 and the audio transmission unit separated from each other in the

Elevator car 3 to be installed. The aim of the procedure is, by means of the evaluation of the

Sensor data in the evaluation device 6 to determine one of several predefined events that are different from normal operation, such as a fire, a fainting person, a left behind object, a heavy pollution of the elevator car or the like. These

Identification of an event is by means of a

Algorithm or by means of several algorithms.

For example, the image data of the optical sensor 9 can first be evaluated by means of an evaluation algorithm to determine how many persons and / or objects are in the elevator car 3 or how long the

Duration of the objects is. This information can be transmitted by means of a so-called feature vector together with the evaluated sensor data of the other sensors 8 to an identification algorithm, which on the basis of reference values and / or machine learning processes or on the basis of fixed thresholds an event

identified. Once an event has been identified, an event identification message is generated by means of which the

current detected in the elevator car 3 event is uniquely identified. However, the creation of this event identification message does not necessarily mean that an alarming procedure is triggered, so for example, the security service or emergency services, such as rescue, police or fire, are alerted. This allows one and the same algorithm in different

Lift cabins 3 at different locations or in can be used in different applications, without the evaluation 6 or the algorithm must be tuned to the site.

The decision as to whether an alerting process is actually triggered on the basis of the identified current event falls on a second level. For this purpose, the event identification message is compared with an event database associated with the respective elevator car 3. Only if in the concrete elevator car 3 associated event database, a corresponding assignment or triggering an alarming procedure is noted, this is

actually triggered. In other words, it is checked whether the detected event is actually a security-relevant event for this elevator car 3 and only then triggers an alerting procedure if a security-relevant event for the specific elevator car 3 has been .

In other words, it can be determined in a simple manner via the definition of the entries of the event database for an associated elevator car 3, when a

Alarming procedure is triggered and for which event no alarming procedure is necessary. Similarly, it can be determined which alarming procedure for the

respective current event should be triggered. For example, in the case of the "impotent person" event, a maintenance or service in the same building may be the first

Security staff are alerted and subsequently notified of the rescue. For example, this can be a life-saving measure in geriatric institutions

represent. In the case of the "fire" event, the fire brigade can be notified and, if necessary, the elevator car 3 on the next floor stopped and the elevator door 5 opened The event "left-over object" leads on the basis of the event database in an airport or airport

Station lift to alert the security service, while in an office or residential building no

Alarming procedure is triggered. The alerting procedure can also produce an audio and / or

Video connection with the elevator car 3 include. It is also conceivable that competent specialist personnel will be notified as part of an alerting procedure via a smartphone app.

It is particularly advantageous and user-friendly if the event database is stored centrally on the server 1, so that on the one hand only the event identification message has to be transmitted to the server 1, which reduces the transmitted data volume, and on the other hand the event database is simple and centrally, for example via a web interface, to the locations and areas of application of the

Elevator cabs 3 is customizable. In this case, any number of elevator cars 3 or their

Monitoring devices 4 (more precisely their

Evaluation devices 6) to be connected to a server 1 or more servers 1 via the communication network 2. In this case, several elevator cars 3 or more

Elevator systems be assigned to a common event database.

In a simple way, use, maintenance or

To be able to alert security forces in geographical proximity or to be able to transmit an exact location, geographic data, such as the address and / or the GPS coordinates, for each elevator car 3 are stored on the server.

In order to be able to carry out plausibility checks and to be able to adapt the algorithms used, provision can be made for the sensor data to be transmitted to the server 1 together with the event identification message and stored there, which led to the identification of the current event. Alternatively or additionally, the feature vector can also be transmitted and stored. Thus, especially if done by third parties

it is confirmed that a safety-relevant event has actually taken place, the algorithm is constantly being improved on the basis of the transmitted sensor data. LIST OF REFERENCE NUMBERS

server

Communication network

car

monitoring device

elevator door

evaluation

display

sensor

optical sensor

supporting cable

counterweight

Claims

1. A method for monitoring an elevator car (3) in

an elevator installation by means of at least one

Sensors (8,9),

wherein the at least one sensor (8,9) detects sensor data in the elevator car (3),

wherein the sensor data via a first data connection to a in the elevator car (3) arranged

Evaluation device (6) are transmitted,

wherein the evaluation device (6) has at least one first communication network (2) via at least one

Server (1) communicates,

characterized in that

to identify a security relevant

Event in the elevator car (3) the following steps are performed:

- Evaluation of the acquired sensor data and

Identifying a current event in the elevator car (3) with one in the

Evaluation device (6) stored algorithm;

Generating an event identification message associated with the current event;

Comparing the event identification message with an event database associated with the elevator car (3), the current event being a match between the event identification message and an entry of the event database as an event relevant to the safety of the elevator car (3) is identified;

- Triggering an alarming procedure by the at least one server (1), if a

security incident was identified.

2. The method according to claim 1, characterized in that the event identification message from the

Evaluation device (6) to the at least one server (1) is transmitted, the elevator car (3) associated with event database on at least one server (1)

is deposited and the comparison of event identification message and event database on the at least one server (1) is performed.

3. The method according to claim 2, characterized in that the event identification message that of

Identification of the current event

containing sensor data.

4. The method according to claim 3, characterized in that the with the event identification message

transmitted sensor data on the at least one

Server (1) are stored.

5. The method according to claim 2 to 4, characterized in that the server (1) with a plurality of

Elevator cabins (3) and / or with a plurality of

Elevator systems communicates.

6. The method according to claim 5, characterized in that each elevator car (3) an event database

is assigned and / or that several elevator cars (3) are combined into one group and each group of elevator cars (3) is associated with an event database.

7. The method according to any one of claims 1 to 6, characterized

characterized in that in the event database for each security-relevant event at least one

Alarmierungsprozedur is deposited.

8. The method according to any one of claims 1 to 7, characterized

in that location data associated with the elevator car (3) are stored on the at least one server (1). are stored and the location data are transmitted as part of the triggered alarm procedure.

Method according to one of claims 1 to 8, characterized in that the alarming procedure comprises at least one of the following steps:

- establishing a communication connection between the at least one server (1) and a

Emergency call center and / or a maintenance center via the first communication network (2) or another communication network;

Maintenance center via the first communication network (2) or another communication network;

- transmission of information to the

Evaluation device (6);

- Establishing a communication link between the at least one server (1) and a smartphone app on the first communication network (2) or another communication network.

Method according to one of Claims 1 to 9, characterized in that the at least one sensor (9) comprises at least one optical sensor, in particular a video camera, a depth camera or a thermal camera, and the sensor data are analyzed by means of image evaluation.

Method according to one of claims 1 to 10, characterized in that the at least one sensor (8) comprises a smoke sensor and / or a temperature sensor and / or an acoustic sensor, in particular a microphone, and / or an acceleration sensor and / or a humidity sensor and / or an ultrasonic sensor. Method according to one of claims 1 to 11, characterized in that the elevator car () a

Display unit (7) and / or an audio transmission unit and the alarming procedure comprises at least one of the following steps:

- Making a video connection between the

Display unit (7) and the at least one

Server (1) or between the display unit (7) and an emergency call center;

Establishing an audio connection between the audio transmission unit and the at least one

Server (1) or between the audio transmission unit and an emergency call center.

Monitoring device (4) for an elevator car (3) with an evaluation device (6), at least one

Sensor (8,9) for detecting sensor data and a communication device for communicating with at least one server (1) via a first

Communication network (2), characterized in that the monitoring device (4) is set up to provide a method according to one of Claims 1 to 12

perform.

Monitoring device (4) claim 13, characterized

characterized in that further comprising a

Display unit (7) for displaying information

and / or an audio transmission unit.

Monitoring device (4) according to claim 13 or 14, characterized in that at least two sensors (8,9) are provided, of which at least one sensor (9) is an image sensor, in particular a video camera

Depth camera or a thermal camera, and at least one smoke sensor and / or a temperature sensor and / or an acoustic sensor, in particular a microphone, and / or an acceleration sensor and / or a moisture sensor is provided.