GIS-based elevator control system using digital signage terminals for elevators

Abstract

We provide a GIS-based elevator control system that utilizes digital signage terminals for elevators. [Solution] A passenger terminal that outputs a pre-generated passenger QR code when boarding the elevator; a digital signage terminal for elevators that recognizes abnormal conditions of the elevator in real time via camera footage, generates and transmits an abnormal condition notification for the elevator in real time, analyzes the vibration, sound, and acceleration of each component of the elevator, generates and transmits a failure / replacement notification for each component of the elevator in real time, outputs elevator safety accident content and advertising content, and conducts video calls between the passenger and the control center operator; a control center terminal that conducts video calls between the passenger inside the elevator and the control center operator; and a system that pre-stores the elevator ID and GIS-linked elevator information for the elevator in question.

Description

Technical Field

[0001] The present invention relates to an elevator control system, and more specifically, to an elevator control system based on GIS using a digital signage terminal for elevators.

Background Art

[0002] Elevators have become an essential means of transportation in modern society, but there is still an insufficient response system for safety accidents and emergencies. In particular, the absence of an appropriate response system for emergencies such as falls, violence, and fires that can occur inside elevators has emerged as a major safety issue. In such a situation, existing emergency bell-based systems rely on physical button operations and have limitations in immediate response.

[0003] Existing elevator control systems are mainly operated in a way that a person directly stays to monitor problems and respond to reports. Such a method is limited in perceiving and dealing with problems in real time. In particular, the response speed becomes slow during time periods when no one is staying. Also, the current system may become useless in situations where users cannot recognize or use the emergency button.

[0004] The accessibility of elevator systems for socially vulnerable people, especially visually and hearing-impaired people, is also at a low level. Since existing systems rely only on voice and text guidance, it is difficult for users with various types of disabilities to appropriately respond in an emergency. Therefore, there is a need to strengthen information transmission and interaction with users in an emergency situation.

[0005] Existing elevator maintenance and management systems are carried out in a way that responds after a failure occurs, and they lack the function of preventing or precluding accidents. In particular, since information transmission between the management entity and the maintenance provider is not performed in real time, there is a problem that the rescue time is delayed.

[0006] Currently, signage systems inside elevators are primarily limited to advertising and providing basic safety information. The utilization of internal displays in elevators during emergencies is low, highlighting the need for an integrated platform that can effectively support situation dissemination and rescue requests. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Korean Registered Patent Publication No. 10-0986261 [Patent Document 2] Korean Registered Patent Publication No. 10-1325040 [Overview of the project] [Problems that the invention aims to solve]

[0008] The object of the present invention is to provide a GIS-based elevator control system that utilizes a digital signage terminal for elevators. [Means for solving the problem]

[0009] The elevator control system based on a GIS that utilizes a digital signage terminal for elevators according to the above-described objectives of the present invention may be configured to include a digital signage terminal for elevators that conducts video calls between passengers and control personnel when an abnormal situation occurs, and a control center terminal that conducts video calls between passengers inside the elevator and the control personnel.

[0010] Here, the abnormal situation may be configured to include a fire, smoke, power outage, the passenger collapsing, acts of violence, and acts of robbery inside the elevator.

[0011] Furthermore, the digital signage terminal for elevators may be configured to output elevator safety accident content and advertising content. [Effects of the Invention]

[0012] According to the GIS-based elevator control system using the aforementioned digital signage terminal for elevators, various IoT-based sensors such as IoT vibration sensors, sound sensors, and acceleration sensors are utilized to continuously monitor the status of the elevator drive system. By analyzing the data in real time, malfunctions and abnormal conditions can be detected early, which helps prevent accidents and maximizes maintenance efficiency.

[0013] Furthermore, the digital signage terminals for elevators automatically recognize abnormal situations and enable immediate action through linkage with control center terminals and on-site personnel terminals. Real-time consultation and rescue support are provided through video calls with control personnel, and the system also allows visually and hearing impaired individuals to safely use the service through sign language avatars and braille tactile displays. [Brief explanation of the drawing]

[0014] [Figure 1] This is a block diagram of a GIS-based elevator control system using a digital signage terminal for elevators according to one embodiment of the present invention. [Modes for carrying out the invention]

[0015] While the present invention can be modified in various ways and may have many different embodiments, specific embodiments are illustrated in the drawings and described in detail in terms of the specific details for carrying out the invention. However, this should not be understood as limiting the present invention to specific embodiments, but rather as including all modifications, equivalents, or substitutes that fall within the spirit and technical scope of the present invention. Similar reference numerals have been used for similar components in the description of each drawing.

[0016] Terms such as First, Second, A, B, etc., can be used to describe various components, but the components should not be limited by such terms. The terms are used solely for the purpose of distinguishing one component from another. For example, without exceeding the scope of the present invention, the First component may be named the Second component, and similarly, the Second component may be named the First component. The terms and / or include combinations of multiple related descriptions or any one of multiple related descriptions.

[0017] When it is stated that one component is "connected" or "linked" to another component, it should be understood that it may also be directly connected or linked to the other component, but that other components may exist between them. Conversely, when it is stated that one component is "directly connected" or "directly linked" to another component, it should be understood that there are no other components between them.

[0018] The terms used in this application are used solely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “includes” or “having” are intended to specify the presence of features, figures, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood not to preemptively exclude the possibility of the presence or addition of one or more other features, figures, steps, actions, components, parts, or combinations thereof.

[0019] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. Terms defined in commonly used dictionaries shall be interpreted as having a meaning consistent with the meaning in the context of the related art, and shall not be interpreted in an ideal or overly formal sense unless clearly defined in this application.

[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0021] FIG. 1 is a block configuration diagram of an elevator control system based on a GIS platform using a digital signage terminal for an elevator according to an embodiment of the present invention.

[0022] Referring to FIG. 1, an elevator control system based on a GIS platform using a digital signage terminal for an elevator according to an embodiment of the present invention may be configured to include an IoT vibration sensor 100, an IoT sound sensor 200, an IoT acceleration sensor 300, a passenger terminal 400, a digital signage terminal 500 for an elevator, a control center terminal 600, an elevator control server 700 based on a GIS platform, and a field operator terminal 800.

[0023] Hereinafter, the detailed configuration will be described.

[0024] The IoT vibration sensor 100 may be attached to each component of the elevator drive device 10 to sense vibration in real time and transmit the sensed vibration to the digital signage terminal 500 for an elevator in real time.

[0025] The IoT sound sensor 200 may be attached to each component of the elevator drive device 10 to sense sound in real time and transmit the sensed sound to the digital signage terminal 500 for an elevator in real time.

[0026] The IoT acceleration sensor 300 may be attached to each component of the elevator drive unit 10 to sense acceleration in real time and may be configured to transmit the sensed acceleration to the elevator digital signage terminal 500 in real time.

[0027] The passenger terminal 400 may be configured to output a pre-generated passenger QR code when boarding the elevator and to provide passenger information in real time.

[0028] The passenger terminal 400 may be configured to include a passenger information storage module 401, a passenger QR code automatic generation module 402, a beacon receiving module 403, an acceleration sensor 404, and a passenger QR code automatic output module 405.

[0029] The following explains the detailed structure.

[0030] The passenger information storage module 401 may be configured to store passenger information in advance.

[0031] Here, the passenger information may be configured to include the passenger's age, gender, occupation, place of residence, mobile phone number, visual impairment information, hearing impairment information, etc.

[0032] The passenger QR code automatic generation module 402 may be configured to automatically generate passenger QR codes using passenger information previously stored in the passenger information storage module 401.

[0033] The beacon receiving module 403 may be configured to receive a beacon signal from the elevator's digital signage terminal 500 when boarding the elevator.

[0034] The acceleration sensor 404 may be configured to sense the acceleration caused by the raising and lowering of the elevator in real time.

[0035] The passenger QR automatic output module 405 may be configured to automatically output a passenger QR generated by the passenger QR automatic generation module 402 when a beacon signal is received by the beacon receiving module 403 or when the elevator's movement is detected in real time by the acceleration sensor 404.

[0036] The digital signage terminal 500 for elevators may be installed inside the elevator and configured to work in conjunction with the elevator drive controller 20.

[0037] Furthermore, the digital signage terminal 500 for elevators may be configured to recognize abnormal conditions of elevators in real time through camera footage, generate an abnormal condition notification for the relevant elevator in real time, and transmit it to the elevator control server 700 based on the GIS.

[0038] Furthermore, the elevator digital signage terminal 500 may be configured to receive vibrations in real time from the IoT vibration sensor 100, sound from the IoT sound sensor 200, and acceleration from the IoT acceleration sensor 300, analyze the received vibrations, sound, and acceleration in real time, generate real-time notifications of failures / replacements for each elevator component, and transmit them to the elevator control server 700 on the GIS platform.

[0039] Furthermore, the digital signage terminal 500 for elevators may be configured to output elevator safety accident content and advertising content, and to facilitate video calls between passengers and air traffic controllers.

[0040] The digital signage terminal 500 for elevators may be configured to include an elevator safety accident content storage module 501, an advertising content storage module 502, an advertising content storage control module 503, an automatic beacon transmission module 504, a passenger QR code recognition module 505, a display module 506, an elevator safety accident content output control module 507, an advertising content output control module 508, a camera module 509, a microphone module 510, an abnormal situation automatic recognition module 511, an abnormal situation notification transmission module 512, a video call module 513, a screen control module 514, a sign language avatar linkage module 515, a braille tactile display module 516, a passenger cumulative analysis module 517, a passenger gaze monitoring module 518, an advertising interest analysis module 519, an IoT sensor value cumulative storage module 520 for each elevator component, an IoT sensor value analysis module 521 for each elevator component, and a failure / replacement notification transmission module 522 for each elevator component.

[0041] The following explains the detailed structure.

[0042] The elevator safety accident content storage module 501 may be configured to pre-save elevator safety accident content.

[0043] The advertising content storage module 502 may be configured to store advertising content in advance.

[0044] The advertising content storage control module 503 may be configured to request and receive predetermined advertising content from the CMS (contents management system) server 30, and to save the received advertising content to the advertising content storage module 502.

[0045] The beacon automatic transmission module 504 may be configured to automatically transmit beacon signals to the passenger terminal 400.

[0046] The passenger QR code recognition module 505 may be configured to recognize the passenger QR code automatically output by the passenger QR code automatic output module 405 and to extract passenger information using the recognized passenger QR code.

[0047] The display module 506 may be configured to output elevator safety accident content and advertising content.

[0048] The elevator safety accident content output control module 507 can select content pre-stored in the elevator safety accident content storage module 501 and control it to output it to the display module 506.

[0049] The advertising content output control module 508 can select content pre-stored in the advertising content storage module 502 and control it to output to the display module 506.

[0050] The camera module 509 may be configured to generate real-time video footage of the inside of the elevator.

[0051] The microphone module 510 may be configured to collect internal sounds from the elevator in real time.

[0052] The abnormal situation automatic recognition module 511 may be configured to use a pre-generated learning model to monitor and analyze in real time the internal video of the elevator generated by the camera module 509 and the internal sound of the elevator collected in real time by the microphone module 510, and to automatically recognize abnormal situations based on the analysis results.

[0053] Here, the abnormal situation may be configured to include, for example, a fire inside the elevator, smoke, a power outage, the passenger collapsing, acts of violence, or acts of robbery.

[0054] At this time, the elevator safety accident content output control module 507 can be controlled to select and output elevator safety accident content corresponding to the abnormal situation automatically recognized by the abnormal situation automatic recognition module 511 using the elevator safety accident content storage module 501.

[0055] The abnormal condition notification transmission module 512 may be configured to generate an abnormal condition notification corresponding to the abnormal condition automatically recognized by the abnormal condition automatic recognition module 511 and transmit it in real time.

[0056] The video call module 513 may be configured to make video calls with the control center terminal 600.

[0057] On the other hand, if the abnormal situation automatic recognition module 511 automatically recognizes an abnormal situation, the screen control module 514 may be configured to output the video call screen of the video call module 513 instead of the advertising content that the advertising content output control module 508 controls to output.

[0058] Furthermore, if the passenger information extracted and recognized by the passenger QR recognition module 505 includes information about hearing impairment, the sign language avatar linkage module 515 may be configured to work in conjunction with the video call module 513 to output the voice of the air traffic controller on the video call screen in real time using the sign language avatar.

[0059] Furthermore, the sign language avatar linked module 515 may be configured to recognize the passenger's sign language motion in real time through the camera module 509, and if a sign language motion is recognized, to automatically output the air traffic controller's voice using the sign language avatar.

[0060] Furthermore, if the passenger information extracted and recognized by the passenger QR recognition module 505 includes information about a visual impairment, the braille tactile display module 516 may be configured to output the air traffic controller's voice on the video call in braille in real time.

[0061] Additionally, the braille tactile display module 516 may be equipped with a touch sensor and configured to automatically output the air traffic controller's voice in braille when a touch is recognized by the touch sensor. Here, the braille may be digital braille driven by an electromagnet.

[0062] The passenger cumulative analysis module 517 may be configured to perform cumulative passenger analysis using passenger information corresponding to the passenger QR code recognized by the passenger QR code recognition module 505.

[0063] The passenger gaze monitoring module 518 may be configured to monitor the passenger's gaze towards advertising content on the display module 506 in real time.

[0064] The advertising interest analysis module 519 may be configured to analyze each passenger's level of interest in advertising by linking passenger information cumulatively analyzed by the passenger cumulative analysis module 517 with the passenger gaze monitoring module 518, which monitors passenger gaze in real time. It may also be configured to feed the analysis results back to the CMS server 30.

[0065] Here, the advertising content storage control module 503 may be configured to select and request advertising content to be stored in the advertising content storage module 502 on the CMS server 30 based on the passengers cumulatively analyzed by the passenger cumulative analysis module 517 and the advertising interest level of each passenger analyzed by the advertising interest level analysis module 519, and to receive the requested advertising content and store it in the advertising content storage module 502.

[0066] On the other hand, if the passenger's gaze remains fixed for less than a predetermined time based on the real-time monitoring results of the passenger gaze monitoring module 518, the advertising content output control module 508 can stop outputting the relevant advertising content and control the advertising content storage module 502 to re-select and output advertising content stored in real time.

[0067] Furthermore, the advertising content output control module 508 can, when there are multiple passengers, consolidate the relevant passenger information and select and output the advertising content corresponding to the passenger information with the highest number of duplicates.

[0068] The IoT sensor value accumulation storage module 520 for each elevator component may be configured to work in conjunction with the control values ​​of the elevator drive controller 20, and to accumulate and store vibration, sound, and acceleration received in real time from the IoT vibration sensor 100, IoT sound sensor 200, and IoT acceleration sensor 300 for each elevator component.

[0069] The IoT sensor value analysis module 521 for each elevator component may be configured to work in conjunction with the control values ​​of the elevator drive controller 20 and analyze vibration, sound, and acceleration stored in the IoT sensor value accumulation storage module 520 for each elevator component in real time. If the vibration, sound, and acceleration linked to the previously accumulated control values ​​change significantly beyond a predetermined standard, it can be analyzed that the elevator component in question is malfunctioning or needs to be replaced.

[0070] The elevator component-specific failure / replacement notification transmission module 522 may be configured to generate elevator component-specific failure / replacement notifications based on the analysis results of the elevator component-specific IoT sensor value analysis module 521 and transmit them in real time to the GIS-based elevator control server 700.

[0071] The destination floor automatic drive module (not shown) may be configured to automatically drive the elevator to the destination floor by comparing the destination floor with the most frequently recorded destination floor with the current floor, when the passenger QR code is recognized by the passenger QR code recognition module 505. For example, if a passenger mainly uses the 1st and 11th floors, the elevator can automatically drive to the 11th floor if the current floor is the 1st floor, and vice versa if the current floor is the 11th floor. This has the advantage of being able to drive the elevator without touching any buttons.

[0072] The control center terminal 600 may be configured to facilitate video calls between passengers in the elevator and the air traffic controller.

[0073] The GIS-based elevator control server 700 may be configured to store elevator IDs and GIS information.

[0074] The GIS-based elevator control server 700 may be configured to receive abnormal status notifications and failure / replacement notifications for individual elevator components in real time from the elevator digital signage terminal 500, and to generate elevator-specific abnormal status inspection commands and elevator component-specific failure / replacement inspection commands in real time using the abnormal status notifications and failure / replacement notifications received in real time, and to send them to the field operator terminal 800.

[0075] The GIS-based elevator control server 700 may be configured to include an elevator ID database 701, a GIS-linked elevator information database 702, an abnormal status notification receiving module 703, an abnormal status inspection command generation module 704 for each elevator, a failure / replacement notification receiving module 705 for each elevator component, a failure / replacement inspection command generation module 706 for each elevator component, and a field personnel command transmission module 707.

[0076] The following explains the detailed structure.

[0077] The elevator ID database 701 may be configured to store the ID of each elevator in advance.

[0078] The GIS-linked elevator information database 702 may be configured to store GIS-linked elevator information corresponding to elevator IDs pre-stored in the elevator ID database 701.

[0079] The abnormal status notification receiving module 703 may be configured to receive abnormal status notifications in real time from the abnormal status notification transmitting module 512.

[0080] The elevator-specific abnormal condition inspection command generation module 704 may be configured to generate elevator-specific abnormal condition inspection commands in real time in response to notifications received by the abnormal condition notification receiving module 703.

[0081] The elevator component-specific fault / replacement notification receiving module 705 may be configured to receive elevator component-specific fault / replacement notifications in real time from the elevator component-specific fault / replacement notification transmitting module 522.

[0082] The elevator component-specific fault / replacement inspection command generation module 706 may be configured to generate elevator component-specific fault / replacement inspection commands in real time in response to elevator component-specific fault / replacement notifications received in real time from the elevator component-specific fault / replacement notification receiving module 705.

[0083] The field operator command transmission module 707 may be configured to transmit in real time to the relevant field operator terminal 800 the elevator-specific abnormal condition inspection command generated in real time by the elevator-specific abnormal condition inspection command generation module 704, or the elevator-specific fault / replacement inspection command generated in real time by the elevator-specific fault / replacement inspection command generation module 706.

[0084] The field operator terminal 800 may be configured to receive and output in real time abnormal status inspection commands for each elevator and failure / replacement inspection commands for each elevator component from the GIS-based elevator control server 700.

[0085] As described above with reference to embodiments, a person skilled in the art will understand that the present invention can be modified and altered in various ways, without departing from the spirit and scope of the invention as set forth in the following claims. [Explanation of Symbols]

[0086] 100 IoT vibration sensors 200 IoT Sound Sensors 300 IoT Accelerometers 400 Passenger terminals 401 Passenger Information Storage Module 402 Passenger QR code automatic generation module 403 Beacon receiving module 404 Accelerometer 405 Passenger QR code automatic output module 500 Digital signage terminal for elevators 501 Elevator Safety Accident Content Storage Module 502 Ad Content Storage Module 503 Advertising Content Storage Control Module 504 Beacon Automatic Transmission Module 505 Passenger QR code recognition module 506 Display Module 507 Elevator Safety Accident Content Output Control Module 508 Advertising Content Output Control Module 509 Camera Module 510 Microphone Module 511 Automatic abnormal situation recognition module 512 Anomaly Situation Notification Transmission Module 513 Video Call Module 514 Screen control module 515 Sign Language Avatar Interlocking Module 516 Braille Tactile Display Module 517 Passenger Cumulative Analysis Module 518 Passenger Eye-Line Monitoring Module 519 Advertising Interest Analysis Module 520 Elevator component-specific IoT sensor value accumulation storage module 521 IoT Sensor Value Analysis Module for Each Elevator Component 522 Elevator component-specific failure / replacement notification transmission module 600 Control Center Terminal 700 GIS-based elevator control server 701 Elevator ID Database 702 GIS-linked elevator information database 703 Anomaly Situation Notification Receiving Module 704 Module for generating abnormal status inspection commands for each elevator. 705 Elevator component-specific failure / replacement notification receiving module 706 Elevator Component-Specific Fault / Replacement Inspection Command Generation Module 707 Field Operator Command Transmission Module 800 Field Staff Terminals

Claims

1. An IoT vibration sensor attached to each component of an elevator drive device, which detects vibration and transmits the detected vibration in real time, An IoT sound sensor is attached to each component of the elevator drive unit and detects sound, and transmits the detected sound in real time. An IoT acceleration sensor is attached to each component of the elevator drive system, which detects acceleration and transmits the detected acceleration in real time. A passenger terminal that outputs a pre-generated passenger QR code when boarding an elevator, and provides passenger information in real time, A digital signage terminal for elevators is installed inside the elevator and works in conjunction with the elevator drive control unit to recognize abnormal conditions in the elevator in real time via camera footage, generate and transmit notifications of the abnormal conditions in real time, output elevator safety accident content and advertising content, and facilitate video calls between the passenger and the control officer. A control center terminal for conducting video calls between passengers inside the elevator and the control officer, A GIS-based elevator control server pre-stores elevator IDs and corresponding GIS-linked elevator information, receives abnormal status notifications and elevator component-specific failure / replacement notifications in real time from the elevator digital signage terminal, and generates and transmits elevator-specific abnormal status inspection commands and elevator component-specific failure / replacement inspection commands in real time based on the abnormal status notifications and elevator component-specific failure / replacement notifications received in real time, A field operator's terminal that receives and outputs elevator-specific abnormal status inspection orders and elevator component-specific failure / replacement inspection orders in real time, transmitted from the elevator control server of the aforementioned GIS platform, Includes, The aforementioned digital signage terminal for elevators is The system recognizes the passenger QR code output from the passenger terminal, extracts passenger information, and outputs advertising content corresponding to the extracted passenger information. The aforementioned passenger information is configured to include the passenger's age, gender, occupation, place of residence, mobile phone number, visual impairment information, and hearing impairment information. If the extracted passenger information includes information about hearing impairment, the air traffic controller's voice during the video call will be output in real time to the video call screen using a sign language avatar. If the extracted passenger information includes information about visual impairment, the air traffic controller's voice during the video call will be output in Braille in real time. The vibration, sound, and acceleration data received in real time from the IoT vibration sensor, IoT sound sensor, and IoT acceleration sensor are accumulated and stored for each elevator component in conjunction with the control values ​​of the elevator drive controller. The accumulated vibration, sound, and acceleration data are analyzed in conjunction with the control values, and based on the analysis results, failure / replacement notifications for each elevator component are generated in real time and transmitted to the elevator control server on the GIS platform. Using the extracted passenger information, the passengers are cumulatively analyzed, their gaze towards the outputted advertising content is monitored in real time, the gaze of the cumulatively analyzed passengers and the gaze of the passengers monitored in real time are linked together to analyze each passenger's interest in the advertisement, and the analysis results are fed back to the CMS server. Based on the cumulatively analyzed passengers and the advertising interest level of each analyzed passenger, select and request advertising content from the CMS server, receive and store the requested advertising content. The system recognizes the passenger's sign language motion in real time, and when a sign language motion is recognized, it automatically outputs the air traffic controller's voice using a sign language avatar. When a touch is detected by a touch sensor located in the braille output area, it automatically outputs the air traffic controller's voice in braille. A GIS-based elevator control system utilizing a digital signage terminal for elevators, characterized by accumulating and recording the destination floor of a recognized passenger QR code when the passenger QR code is recognized, comparing the most frequently recorded destination floor with the current floor, and automatically driving the elevator to that floor.

2. In a GIS-based elevator control system using the elevator digital signage terminal described in Claim 1, The aforementioned passenger terminal is, A passenger information storage module in which passenger information is stored in advance, A passenger QR code automatic generation module that automatically generates a passenger QR code using the passenger information stored in the passenger information storage module, A beacon receiving module that receives a beacon signal from the digital signage terminal for the elevator when boarding the elevator, An acceleration sensor that detects the acceleration associated with the raising and lowering of the elevator in real time, A passenger QR code automatic output module that automatically outputs the passenger QR code when the beacon signal is received or the acceleration is detected, Includes, The elevator digital signage terminal and the elevator control server of the GIS infrastructure are: A GIS-based elevator control system utilizing a digital signage terminal for elevators, characterized in that each component module is included as described in claim 1.

3. In a GIS-based elevator control system using the elevator digital signage terminal described in Claim 1, The aforementioned abnormal situation is, A GIS-based elevator control system utilizing a digital signage terminal for elevators, characterized by including fire, smoke, power outage, passenger collapse, acts of violence, and robbery inside the elevator.

Images