Method and system for contactless elevator control

Abstract

A control system for controlling the operation of an elevator is disclosed, the elevator being arranged to serve different floors of a building. The control system comprises: an input interface configured to receive a distance indicator measurement of an object located at a service floor within a sensor line of sight; an output interface configured to cause a display device to display a floor value indicating a target floor; and a processor configured to: compare the received distance indicator with a reference distance indicator to estimate a comparison sign and a comparison value; repeatedly update the floor value displayed on the display device in the elevator service direction indicated by the sign at an update frequency indicated by the comparison value until a termination condition is met; and cause the elevator to perform a service operation from the service floor to the target floor.

Description

Technical Field

[0001] The present disclosure relates generally to vertical transportation technology and, more particularly, to methods and systems for controlling the operation of an elevator arranged to serve different floors of a building. Background Art

[0002] Today, elevators are commonly used in office buildings and residential buildings. Typically, elevators are controlled by physical contact, such as touching or pressing a control button to operate the elevator. The control button may correspond to the desired direction of travel or directly to the desired destination floor. This physical contact of several users on the control button may leave millions of microorganisms on the surface of the control button. In some cases, these microorganisms may include bacteria or viruses that can cause the spread of infectious diseases. To overcome these problems, contactless input has been introduced in many systems to control elevators. Contactless input includes gesture-based input, voice command-based input, etc.

[0003] However, processing voice command-based input or gesture-based input required to control the elevator is complex. Such input methods require a large amount of computing and communication infrastructure and have associated costs and installation time. In addition, voice command-based input fails in cases where the user does not understand the language accepted by the system for recognizing voice command-based input. In addition, due to different accents of users, voice command-based input may not be correctly recognized by the system, which may lead to inefficient operation of the elevator. Moreover, in the case of gesture-based input, the user needs to understand the gestures accepted by the system to control the elevator. Due to these limitations, current systems are inefficient and cause inconvenience to elevator users.

[0004] Therefore, there is a need for a system for operating an elevator with contactless input to the elevator in an efficient and feasible manner. Summary of the invention

[0005] Some embodiments are based on the recognition that the movement of an elevator can be controlled by contactless input. To this end, it is an object of some embodiments to provide a control system and method for calculating contactless input to control an elevator in a contactless manner.

[0006] Some embodiments are based on the recognition that a sensor configured to receive contactless user input can be used to control an elevator. Such a sensor measures a distance indicator to an object (e.g., a user's hand). To do this, the hand is placed within the sensor's line of sight and a distance indicator from the sensor to the hand is measured. The measured distance indicator is compared with a reference distance indicator, where the reference distance indicator is within the sensor's line of sight. In some embodiments, the reference distance indicator can be indicated as a baseline within a specific range of the sensor. In other embodiments, the reference distance indicator can correspond to an initial position of the hand detected by the sensor. As used herein, a distance indicator is data indicating the distance between a sensor or a group of sensors and an object. Examples of distance indicators include measurements of distance, temperature of an object depending on the distance to the object, and the like.

[0007] In addition, some embodiments aim to display the service floor in the display device according to the comparison value. The update frequency is determined based on the comparison value. In some embodiments, the update frequency is proportional to the comparison value. In addition, in the case where the comparison value is below the distance threshold, the update frequency is zero. The update frequency is proportional to the comparison value (i.e., the difference between the measured distance indicator and the reference distance indicator). In addition, the elevator service direction is determined based on the sign of the comparison value. The direction can be indicated as an upward direction or a downward direction of the elevator service.

[0008] In some embodiments, the displayed floor value is repeatedly updated until a termination condition is met. The termination condition is met when the comparison value is below the distance threshold for a time period greater than the threshold time period.

[0009] In some embodiments, the floor value of a building may be associated with the floor of the building. Additionally, or alternatively, the floor value may include a series of integers, and the smaller values ​​of the integers may correspond to the lower floor values ​​of the floor value. These numbers may increase or decrease when the displayed floor value is updated.

[0010] Additionally or alternatively, the user may change the target floor by moving an object (i.e., the user's hand) within the sensor's line of sight. To this end, the sensor's line of sight may be in a vertical direction, allowing the user to change the target floor by moving the hand up or down. In some other embodiments, the sensor's line of sight may be in a horizontal direction, allowing the user to change the target floor by moving the hand backward or forward, or a combination of the two.

[0011] In some cases, the commonly used floors of the building can be displayed on the display device based on the comparison value. In some exemplary embodiments, when the sign of the comparison value is negative and the comparison value is higher than a predetermined threshold, the lowest floor commonly used, such as the ground floor or street level, is indicated on the display device. When the sign of the comparison value is positive and the comparison value is higher than a predetermined threshold, the top floor of the building, such as the top floor, is displayed on the display device.

[0012] In some embodiments, the sensor may include an infrared (IR) sensor, such as a passive infrared (PIR) sensor, which may be configured to measure radiant heat emitted by or reflected from an object. The measured radiant heat may be used to determine the distance from the PIR sensor to the object. In addition, or alternatively, the PIR sensor may include a pair of PIR sensors mounted at an angle and pointing toward the object. Each of the pair of PIR sensors may capture a thermal image of the object from a corresponding angle of the PIR sensor. In the two thermal images, a center point of an image pixel may be calculated, the value of which is above a predetermined threshold. The difference between the positions of the object in the two thermal images may be used to calculate the distance between the object and the pair of PIR sensors. The calculated distance may be compared with a reference distance indicator, and the target floor may be displayed based on the comparison. In addition, or alternatively, the sensor may include a camera (such as a red, green, and blue depth (RGBD) camera) to measure a depth map of an object in front of the RGBD camera.

[0013] Therefore, one embodiment discloses a control system for controlling the operation of an elevator, the elevator being arranged to serve different floors of a building, the control system comprising an input interface, an output interface, and a processor. The input interface is configured to receive a distance indicator measurement of an object located at a service floor within a sensor line of sight. The output interface is configured to cause a display device to display a floor value indicating a target floor. The processor is configured to compare the received distance indicator with a reference distance indicator to estimate a comparison sign and a comparison value. The processor is further configured to repeatedly update the floor value displayed on the display device in the elevator service direction indicated by the comparison sign at an update frequency indicated by the comparison value until a termination condition is met. The processor is further configured to cause the elevator to perform a service operation from the service floor to the target floor indicated by the floor value displayed when the termination condition is met.

[0014] Another embodiment discloses a method for controlling the operation of an elevator arranged to serve passengers to different floors of a building. The method uses a processor in combination with stored instructions for implementing the method. The instructions, when executed by the processor, implement the steps of the method. The method includes receiving a distance indicator measurement of an object located at a service floor within a sensor line of sight. The method includes comparing the received distance indicator with a reference distance indicator to estimate a comparison sign and a comparison value. The method also includes repeatedly updating the floor value displayed on a display device in the elevator service direction indicated by the comparison sign at an update frequency indicated by the comparison value until a termination condition is met. The method further includes causing the elevator to perform a service operation from the service floor to a target floor indicated by the floor value displayed when the termination condition is met.

[0015] Other features and advantages will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0016] In the following detailed description, the present disclosure is further described by way of non-limiting examples of exemplary embodiments of the present disclosure with reference to the various figures mentioned, wherein like reference numerals represent like parts in the several views of the drawings. The drawings shown are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the presently disclosed embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] [ Figure 1A ] Figure 1A A representation of an environment for controlling elevator operations of a building is shown, according to some embodiments of the present disclosure.

[0018] [ Figure 1B ] Figure 1B A control system for controlling the operation of an elevator is shown according to an exemplary embodiment of the present disclosure.

[0019] [ Figure 2 ] Figure 2 An input / output (I / O) interface for measuring the distance to an object within the line of sight of a sensor of a control system is shown according to an exemplary embodiment of the present disclosure.

[0020] [ Figure 3A ] Figure 3A A tabular representation depicting elevator service directions is shown according to an exemplary embodiment of the present disclosure.

[0021] [ Figure 3B ] Figure 3B A table representation depicting updated changes regarding floor values ​​displayed on a display device is shown according to an exemplary embodiment of the present disclosure.

[0022] [ Figure 3C ] Figure 3C A tabular representation depicting termination conditions for elevator service is shown according to an exemplary embodiment of the present disclosure.

[0023] [ Figure 4 ] Figure 4 A tabular representation depicting floor values ​​associated with floors of a building is shown according to an exemplary embodiment of the present disclosure.

[0024] [ Figure 5 ] Figure 5 A flow chart for controlling the operation of an elevator according to an exemplary embodiment of the present disclosure is shown.

[0025] [ Fig. 6A ] Fig. 6A An I / O interface for measuring the distance to a user's hand within the line of sight of a sensor of a control system is shown according to an exemplary embodiment of the present disclosure.

[0026] [ Figure 6B ] Figure 6B An I / O interface for measuring the distance to a user's hand within the line of sight of a sensor of a control system is shown according to an exemplary embodiment of the present disclosure.

[0027] [ Figure 6C ] Figure 6C An I / O interface for measuring the distance to a user's hand within the line of sight of a sensor of a control system is shown according to another exemplary embodiment of the present disclosure.

[0028] [ Fig.6D ] Fig.6D An I / O interface for measuring the distance to a user's hand at a maximum position within the line of sight of a sensor of a control system is shown according to an exemplary embodiment of the present disclosure.

[0029] [ Fig. 6E ] Fig. 6E An I / O interface for measuring the distance to a user's hand within the line of sight of a sensor of a control system is shown according to an exemplary embodiment of the present disclosure.

[0030] [ Fig. 7A ] Fig. 7A An I / O interface for measuring the distance to a user's hand within the line of sight of a sensor of a control system is shown according to another exemplary embodiment of the present disclosure.

[0031] [ Figure 7B ] Figure 7BAn I / O interface for measuring the distance to a user's hand within the line of sight of a sensor of a control system is shown according to another exemplary embodiment of the present disclosure.

[0032] [ Fig. 8A ] Fig. 8A An I / O interface for measuring the distance to a user's hand within the line of sight of a sensor of a control system is shown according to an exemplary embodiment of the present disclosure.

[0033] [ Figure 8B ] Figure 8B An I / O interface for measuring the distance to a user's hand within the line of sight of a pair of passive infrared (PIR) sensors is shown according to another exemplary embodiment of the present disclosure.

[0034] [ Fig. 9A ] Fig. 9A A flow chart of a method for controlling elevator operation of a building according to an exemplary embodiment of the present disclosure is shown.

[0035] [ Fig. 9B ] Fig. 9B A flow chart of a method for controlling elevator operation of a building according to an exemplary embodiment of the present disclosure is shown.

[0036] [ Fig.10 ] Fig.10 A block diagram of a control system for controlling elevator operations of a building is shown according to an exemplary embodiment of the present disclosure.

[0037] [ Fig.11 ] Fig.11 A scenario in which an elevator operation of a building is controlled by a control system according to an exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0038] Although the above-mentioned drawings illustrate the embodiments of the present disclosure, other embodiments may be conceived as noted in the discussion. The present disclosure presents illustrative embodiments by way of representation and not limitation. Those skilled in the art may devise many other variations and embodiments that fall within the scope and spirit of the principles of the embodiments of the present disclosure.

[0039] Detailed Description

[0040] In the following description, for the purpose of explanation, many specific details are provided to provide a thorough understanding of the present disclosure. However, it is apparent to those skilled in the art that the present disclosure can be practiced without these specific details. In other cases, devices and methods are shown only in block diagram form to avoid obscuring the present disclosure.

[0041] As used in this specification and claims, the terms "for example," "for example," and "such as," and the verbs "comprise," "have," "include," and other verb forms thereof, when used with a list of one or more components or other items, are to be understood as open ended, meaning that the list should not be considered to exclude other, additional components or items. The term "based on" means based at least in part on. In addition, it should be understood that the phrases and terms used herein are for descriptive purposes only and should not be construed as limiting. Any headings used in this description are for convenience only and have no legal or limiting effect.

[0042] Overview

[0043] Elevators are commonly used in office buildings and residential buildings and can be organized into groups with multiple elevator cars. When requesting elevator service, passengers typically use an interface, such as a lobby call panel, which has several methods of providing user input (e.g., contact-based input or contactless input) for operating a desired direction of travel or target floor. Embodiments of the present disclosure provide such a control system and method that allow passengers of an elevator to request elevator service and indicate their desired target floor using contactless input. More specifically, the control system uses a sensor to measure the distance to the user's hand, compares the measured distance with a reference distance, and confirms the target floor selected for service by analyzing the hand's movements, and registers the selected floor in the elevator control system.

[0044] Figure 1A An environment representation 100 for controlling the movement of an elevator 104 of a building 102 is shown according to some embodiments of the present disclosure. The elevator 104 in the building 102 moves a user 110 from one service floor of the building 102 to another service floor. The environment representation includes the user 110 entering the elevator 104 at one service floor and moving to another service floor of the building 102. The elevator 104 includes an input / output (I / O) interface 112. A similar input interface 112 can be installed inside the elevator 104 for receiving input for operating the elevator 104. In some embodiments, the I / O 112 receives contactless input via a sensor 106. The sensor 106 can be embedded in the I / O 112. The I / O 112 can also include a display device 108 for displaying the floor value of the building 102. In addition or alternatively, the I / O 112 can include a visual guide 114 for indicating the direction of movement of the elevator 104 when confirming the selected target floor. For example, the visual guide 114 can indicate the upward movement or downward movement of the lift 104. In some embodiments, the visual guide 114 can be a flashing indicator light to indicate the direction of movement of the lift 104.

[0045] In one embodiment, user 110 provides contactless input to I / O interface 112 via sensor 106 to move elevator 104 up or down in building 102. To do this, user 110 places their hand within the line of sight of sensor 106 and moves their hand up / down or forward / backward to provide contactless input. Sensor 106 measures the distance to the hand of user 110. A target floor can be selected based on the measured distance. The selected target floor is displayed on display device 108. The distance measurement is provided to the control system, which is then referenced. Figure 1B The control system is further described.

[0046] Figure 1B 1 shows a control system 116 for controlling the operation of the elevator 104 according to an exemplary embodiment of the present disclosure. The control system 116 includes a processor 118, a memory 120, an input interface 122 including the sensor 106, and an output interface 124 including the display device 108. The output interface 124 is configured to cause the display device 108 to display a floor value indicating a target floor. The input interface 122 and the output interface 124 combined correspond to Figure 1A The I / O interface 112 of the control system 116. In some embodiments, in the control system 116, the processor 118 is connected to the sensor 106 and the display device 108 via a wired connection. In other embodiments, the processor 118 is connected to the sensor 106 and the display device 108 via a wireless connection. The memory 120 is configured to store computer executable instructions, which are executed by the processor 118 for controlling the movement of the elevator 104. The input interface 122 is configured to receive, via the sensor 106, a measurement of a distance indicator of an object (e.g., a hand of the user 110) located on the service floor within the line of sight of the sensor 106. The sensor 106 is configured to sense the presence of an object located at the line of sight of the sensor 106 and measure the distance to the object. The measurement of the distance to the object is further provided to the processor 118.

[0047] The processor 118 is configured to compare the received distance with the reference distance to estimate a comparison value and a sign of the comparison value (also referred to as a comparison sign). The comparison sign indicates the elevator service direction (e.g., upward or downward direction) of the elevator 104. The comparison value indicates the frequency of updating the floor value displayed on the display device 108. The floor value indicating the floor is displayed on the display device 108. The floor value is displayed together with the elevator service direction. The processor 118 is also configured to repeatedly update the floor value displayed on the display device 108 until a termination condition is met. When the termination condition is met, the processor 118 is further configured to cause the elevator 104 to perform a service operation from the service floor to the target floor indicated by the displayed floor value.

[0048] Figure 2An I / O interface 200 is shown according to an exemplary embodiment of the present disclosure, for measuring the distance to an object within a line of sight 204 of a sensor 202. The I / O interface 200 includes the sensor 202 (as an input interface) and a display device 210 (as an output interface). The I / O interface 200 corresponds to Figure 1A I / O interface 112. Sensor 202 corresponds to sensor 106. Display device 210 corresponds to display device 108. In an exemplary embodiment, sensor 202 can be mounted in the base area of ​​lift 104. Sensor 202 projects a signal having line of sight 204 (i.e., Figure 2 The light shown in "L").

[0049] In addition, Figure 2 As shown in FIG. 2 , the sensor 202 projects light in a vertical direction, and the line of sight 204 of the sensor 202 is in the vertical direction. When an object falls within the line of sight 204, the sensor 202 measures the distance to the object. For example, the object is at position 206B, and the sensor 202 measures the distance (D C )208B. The distance (D C )208B and reference distance (D R )208A for comparison. Reference distance (D R ) 208A corresponds to a baseline (B) position 206A, which is a preset position used to reference the distance of objects at the line of sight 204. In some cases, the baseline (B) position 206A may be marked on the wall of the elevator 104 to provide a visual guide for users (such as user 110) to position their hands. In some other cases, the baseline (B) position 206A may not be visible to the user 110.

[0050] Measuring distance (D C )208B and reference distance (D R )208A provides a symbol indicating the direction of service of the lift, which will be referred to next. Figure 3A Explain the symbol.

[0051] Figure 3A A tabular representation 300 depicting elevator service directions for elevators 104 is shown according to an exemplary embodiment of the present disclosure. The tabular representation 300 includes columns such as a received distance 302, a reference distance 304, a comparison 306, a symbol 308, and a direction 310. The received distance 302 and the reference distance 304 may be measured in centimeters (cm). The received distance 302 corresponds to a measured distance (D C )208B. The reference distance 304 corresponds to the reference distance (D R )208A.

[0052] For example, the receiving distance 302 is 10 centimeters and the reference distance 304 is 5 centimeters. The control system 116 determines a comparison 306 between the receiving distance 302 (i.e., 10 centimeters) and the reference distance 304 (i.e., 5 centimeters). Based on the comparison 306, the control system 116 estimates a sign 308 corresponding to the comparison 306, wherein the sign 308 is estimated to be a positive (+ve) sign because the receiving distance 302 is greater than the reference distance 304. In addition, the processor 118 of the control system 116 is configured to cause the display device 210 to indicate the direction 310 as an upward direction of the elevator service when the sign 308 of the comparison 306 is positive. In some cases, the receiving distance 302 may be less than the reference distance 304. For example, the receiving distance 302 (e.g., 3 centimeters) is less than the reference distance 304 (e.g., 5 centimeters). In this case, the sign 308 is negative and the indicated direction 310 is a downward direction.

[0053] The processor 118 estimates a value based on the comparison 306 of the received distance 302 and the reference distance 304, and based on the value, repeatedly updates the floor value, and then refers to Figure 3B Describe this.

[0054] Figure 3B A table representation 312 is shown depicting updated changes in floor values ​​displayed on the display device 210 in the elevator service direction according to an exemplary embodiment of the present disclosure. The table representation 312 includes columns such as reception distance 302, reference distance 304, comparison 306, comparison 306 value 314, and update frequency 316.

[0055] In some embodiments, the update frequency 316 is proportional to the value 314 of the comparison 306, such that a larger value of the comparison 306 increases the update frequency relative to a lower value of the comparison 306. The update frequency 316 stores information to increment or decrement the rate of change of the displayed floor value based on the value 314 of the comparison 306 between the received distance 302 and the reference distance 304. More specifically, the floor value is updated (incremented or decremented) based on the value 314 of the comparison 306 per time unit (e.g., per second).

[0056] For example, the receiving distance 302 is "10 centimeters" and the reference distance 304 is "5 centimeters". In this case, the value 314 of the comparison 306 is "5". Therefore, based on the comparison value (i.e., 5), the update frequency 316 is 5 times per second. The processor 118 further estimates the sign 308 based on the value 314 of the comparison 306, wherein the sign 308 is a positive sign indicating an upward direction because the receiving distance 302 (i.e., 10 centimeters) is greater than the reference distance 304 (i.e., 5 centimeters). Therefore, for the value 314 ("5") of the comparison 306 having a positive sign and an upward direction, the displayed floor value (e.g., the 15th floor) increases by 5 (e.g., to the 20th floor) within one second. In addition, based on the update frequency 316 being "5", the displayed value of the 15th floor changes to the 25th floor within two seconds.

[0057] In addition, when the receiving distance 302 (i.e., 3 cm) is less than the reference distance 304 (i.e., 5 cm), the comparison 306 corresponds to a negative sign indicating a downward direction. Based on the value 314 of the comparison 306, the update frequency is 2 times per time unit, and the displayed floor value is decremented by 2 floors per second. Therefore, the displayed floor value (e.g., the 15th floor) is decremented to one floor (e.g., the 10th floor) in 2.5 seconds.

[0058] The repeated updating of the floor value in the elevator service direction based on the symbol 308 and the value 314 of the comparison 306 is terminated based on the termination condition, and then Figure 3C This is explained in .

[0059] Figure 3C A table representation 318 depicting the termination conditions of an elevator service according to an exemplary embodiment of the present disclosure is shown. The table representation 318 includes information such as a receiving distance 302, a reference distance 304, a difference 320 (the difference between the receiving distance 302 and the reference distance 304), a distance threshold (TH) 322, a time (T) 324, and a termination condition 326.

[0060] When the termination condition is met, the repeated updating of the displayed floor value stops. In this case, the updating frequency corresponds to zero.

[0061] In some embodiments, the termination condition 326 is based on the update frequency and the threshold time period (i.e., time (T) 324). For example, the receiving distance 302 is "10 centimeters" and the reference distance 304 is "5 centimeters". In this case, the difference 320 is "5 centimeters", and therefore, the comparison value between the receiving distance 302 and the reference distance 304 is "5". Based on the comparison value and the sign of the value, the update frequency is determined to be "5", so that within the threshold time (e.g., 2 seconds), the floor value is incremented 5 times per second. Therefore, after 2 seconds, the termination condition 326 is met and the updating of the floor value stops. Alternatively, in some embodiments, the termination condition 326 is based on the update frequency (e.g., 5 times per second) and the floor value of the top floor of the building 102. In this case, the floor value is incremented 5 times per second until the floor value is updated to the floor value of the top floor. Therefore, after the floor value of the top floor is updated, the termination condition 326 is met and the updating of the floor value stops.

[0062] In some embodiments, when the value 314 of the comparison 306 (indicated by the difference 320 between the received distance 302 and the reference distance 304) is lower than the distance threshold (TH) 322 for a period of time greater than the threshold time (i.e., time (T) 324), the termination condition 326 is satisfied. For example, the difference 320 (5 cm) is less than the distance threshold (TH) 322 (10 cm) for a period of time (e.g., 6 seconds), and the period of time is greater than the threshold time (e.g., 5 seconds), the termination condition 326 is "true".

[0063] When the user 110 places his hand at the reference distance 304 (i.e., at the baseline (B)) and waits for a period of time (e.g., 7 seconds), the received distance 302 is equal to the reference distance 304, so that the difference 320 is "zero", and the difference is less than the distance threshold (TH) 322 (e.g., 10 cm) within a period of time (7 seconds) greater than the threshold time (e.g., 5 seconds). In this case, the termination condition 326 is met, and the displayed floor value stops being updated.

[0064] In some embodiments, the distance threshold (TH) 322 may be a distance value from the baseline (B) and is related to the top floor of the building 102. In some cases, the difference value 320 is greater than the distance threshold (TH) 322, wherein the difference value 320 corresponds to the update frequency, thereby updating the floor value. Since the difference value 320 is greater than the distance threshold (TH) 322, the updated floor value exceeds the floor value of the top floor. In this case, the processor 118 is configured to update the floor value to the floor value of the top floor and terminate the repeated updating of the floor value. Therefore, the floor value is updated to the floor value of the top floor, and it is considered that the termination condition 326 is satisfied.

[0065] After the termination condition 326 is met, the user 110 may again provide input to select a target floor by moving his hand within the line of sight 204 of the sensor 202 .

[0066] In some embodiments, the floor value is associated with a floor of the building 102. Figure 4 This is described in .

[0067] Figure 4 A tabular representation 400 depicting floor values ​​associated with floors of a building 102 is shown according to an exemplary embodiment of the present disclosure. The tabular representation 400 includes a floor column 402 and a floor value column 404. Each floor of the building 102 represented in the floor column 402 is associated with a floor value in the floor value column 404.

[0068] The floor values ​​in the floor value column 404 are a series of integers, as shown in the table representation 400. In the floor value column 404, smaller values ​​are based on distance values ​​corresponding to lower floor values. Each distance value corresponds to a relationship between each value of the distance from the sensor 202 to the object and a reference distance. In addition, each floor value displayed on the display device 210 increases or decreases sequentially when the floor value is updated.

[0069] Figure 5 A flowchart 500 is shown for controlling the operation of the elevator 104 according to an exemplary embodiment of the present disclosure. In some embodiments, the processor 118 of the control system 116 can be configured to perform the steps of the operation. The flowchart 500 starts at step 502.

[0070] At step 504, the measured distance (D C ). When an object (e.g., a user's hand) is within the line of sight 204 of the sensor 202, the sensor 202 measures the distance. For example, the user moves his hand within the line of sight 204 of the sensor 202. Based on the current position of the user's hand, the sensor 202 measures the distance.

[0071] At step 506, the distance (D C ) and the reference distance (D R ) for comparison. To this end, the processor 118 obtains the measured distance (D C ) and extracts the reference distance (D) from the memory 120 R ).

[0072] At step 508, after measuring the distance (D C ) is greater than the reference distance (D R ), the moving direction of the elevator is indicated as the upward direction. In addition, control proceeds to step 512.

[0073] At step 510, after measuring the distance (D C ) is less than the reference distance (D R ), the moving direction of the elevator is indicated as the downward direction. In addition, control proceeds to step 514.

[0074] At step 512, based on the measured distance (D C ) is greater than the reference distance (D R ) and the estimated update frequency, the displayed floor value is incremented. To this end, the processor 118 is based on the measured distance (D C ) and the reference distance (D R ) to calculate the update frequency. The difference corresponds to the number of floors to be incremented. In addition, control proceeds to step 516.

[0075] At step 514, based on the measured distance (D C ) is less than the reference distance (D R ) and estimate the update frequency, and decrease the displayed floor value. To this end, the processor 118 measures the distance (D C ) and the reference distance (D R ) to calculate the update frequency. The difference corresponds to the number of floors to be decremented. In addition, control proceeds to step 516.

[0076] At step 516, the updated floor value is displayed based on one of the increment of the floor number or the decrement of the floor number. The processor 118 causes the display device 210 to display the updated floor value.

[0077] At step 518, the termination condition is checked. If the termination condition is not met, the process proceeds to step 516. Otherwise, the process proceeds to step 520. At step 520, when the termination condition is met, the repeated updating of the displayed floor value is terminated. In some embodiments, when the received distance (D C ) and the reference distance (D R ) is lower than the distance threshold within a time period greater than the threshold time, the termination condition is met. In this case, the floor value is not updated.

[0078] At step 522, when the termination condition is met, the target floor is confirmed. To this end, the processor 118 regards the value displayed on the display device as the confirmed floor (ie, the target floor).

[0079] At step 524, elevator service of the elevator 104 is requested based on the confirmation of the target floor.

[0080] At step 526 , when the termination condition is met, the elevator 104 is controlled to move to the target floor through the floor value displayed on the display device, and the operation is ended at step 528 .

[0081] Fig. 6A An I / O interface 600 is shown for measuring the distance to a hand of a user 110 within the line of sight (L) 204 of a sensor 202 of a control system 116 according to an exemplary embodiment of the present disclosure. The I / O interface 600 corresponds to the input interface 200.

[0082] The hand of user 110 provides a contactless input via sensor 202. User 110 moves the hand upward at line of sight (L) 204. As the hand moves upward, the hand moves away from baseline B. For example, the hand of user 110 moves upward from initial position 602A to a position at 602B. The distance of baseline B corresponds to reference distance (D R )208A, and the distance to the position 602B corresponds to the measured distance (D C )208B. In one exemplary embodiment, the reference distance (D R ) 208A may be the initial distance to the hand. This may allow users of different heights to change the target floor by moving the hand relative to the initial position of the hand within the line of sight 204. For example, a user under 10 years old may be shorter than an adult user. A shorter user may move the hand relative to the initial position to change the target floor in a convenient manner. In addition, the reference distance (D R )208A and measurement distance (D C )208B is compared and a comparison sign and value are determined based on the comparison.

[0083] In measuring distance (D C )208B is greater than the reference distance (D R ) 208A, the comparison sign is positive and the comparison value indicates an upward direction. The upward direction can be indicated to the user 110 via the visual indicator 604. The visual indicator 604 can also display an increment of the displayed floor value (e.g., floor value 0) based on the update frequency provided by the comparison value. In an illustrative example scenario, the floor value 606A (e.g., floor value 0) is displayed on the display device 210. Figure 6B As shown in FIG. 6 , the displayed floor value 606A is incremented to a floor value 606B (eg, floor value 5) within one second. The floor value 606A is incremented based on the update frequency, for example, 5 times per second.

[0084] In some embodiments, the sensor 202 may be implemented horizontally, and the line of sight (L) 204 is projected in the horizontal direction, which is shown in FIG. Figure 6C middle.

[0085] Figure 6C An I / O interface 600 for measuring the distance to a hand of a user 110 that is within the line of sight (L) 204 of a sensor 202 of a control system 116 is shown according to another exemplary embodiment of the present disclosure.

[0086] The user 110 places his hand in front of the sensor 202 within the line of sight (L) 204 and moves forward or backward from the baseline B. Figure 6C As shown in FIG. 6 , the hand of user 110 moves forward toward baseline B. The hand moves from position 602A to position 602B. Sensor 202 measures the distance (D C )208B. Measure distance (D C )208B and reference distance (D R As the hand moves toward the baseline B, the floor value 608 displayed on the display device 210 decreases.

[0087] For example, user 110 wishes to go from floor 5 (floor value 5) to floor 2 (floor value 2). In this case, user 110 may provide input to decrease floor value 5. To do this, user 110 moves his hand so that the measured distance (D C )208B is less than the reference distance (D R )208A. Reference distance (D R )208A and measurement distance (D C ) 208B is used to estimate the sign (i.e., negative or positive) of the indicated direction (i.e., upward or downward, as shown in visual guide 604). If the sign of the comparison value (e.g., "3") is negative, the direction associated with the floor is estimated to be the downward direction, and based on the update frequency provided by the comparison value (e.g., 3 times per time unit), the displayed floor value 608 is decremented. Therefore, elevator 104 is controlled to move downward from the 5th floor to the 2nd floor in one second.

[0088] Fig.6D An I / O interface 600 for measuring the distance to a hand of a user 110 at a maximum position within the line of sight of a sensor of a control system 116 is shown according to another exemplary embodiment of the present disclosure.

[0089] For example, the user wants to go to a specific floor, such as "the 5th floor". However, the user 110 mistakenly enters the distance (D O ) 208C moves the hand at the maximum position, and the corresponding floor value 610 (e.g., the 10th floor) is displayed on the display device 210. The hand of the user 110 may be at the position 602C of the overshoot floor value 610. In this case, the user 110 can move the hand at the maximum position by moving the hand at the overshoot distance (D O)602C to correct the overshooting of the target floor. Fig. 6E As shown in FIG. 6 , the hand of user 110 moves from position 602C to position 602D. Therefore, sensor 202 measures the distance (D) to position 602D. F ) 208D. In addition, the processor 118 measures the distance (D F ) 208D is compared with the reference distance to estimate the update frequency. According to the update frequency, the floor value is updated (for example, from the 10th floor to the 5th floor). In addition, the processor 118 causes the display device 210 to display the updated floor value 612 (for example, the 5th floor).

[0090] In some exemplary embodiments, frequently used floors may be selected through contactless input. Fig. 7A and Figure 7B This is described in .

[0091] Fig. 7A An I / O interface 700 for measuring the distance to a hand of a user 110 that is within the line of sight (L) 204 of a sensor 202 is shown according to another exemplary embodiment of the present disclosure.

[0092] I / O interface 700 corresponds to I / O interface 600. User 110 places his / her hand within line of sight 204 of sensor 202. User 110 moves the hand from position 702A to position 702B. Position 702B is before baseline B and is close to sensor 202. In addition, sensor 202 measures the distance of the hand at position 702B from sensor 202. The measured distance (e.g., 5 cm) is compared to the distance between sensor 202 and baseline B (e.g., 10 cm). Based on the comparison value of the distance (e.g., 5), a sign associated with the value is determined (e.g., a negative sign (because 5 cm<10 cm)).

[0093] In some embodiments, the comparison value (i.e., 5 cm) is compared to a predetermined threshold value (e.g., 3). When the comparison sign is negative and the comparison value is above the predetermined threshold value, the lowest floor of the building 102 is indicated. In one example embodiment, the display device 210 displays the street level (G) 706 based on the negative sign and the comparison value being above the predetermined threshold value. Fig. 7A As shown in FIG. 7 , floor 706 is indicated by a “G” displayed in display device 210. Additionally, or alternatively, visual guide 604 indicates a downward direction 704A and a level of travel 704B that the elevator service.

[0094] In a similar manner, the highest floor of the building 102 may be indicated on the display device 210, and the highest floor of the building 102 may be indicated on the display device 210. Figure 7B This is explained in .

[0095] Figure 7B An I / O interface 700 for measuring the distance to a hand of a user 110 that is within the line of sight (L) 204 of a sensor 202 is shown according to another exemplary embodiment of the present disclosure.

[0096] The user 110 moves the hand from position 708A near the sensor 202 to position 708B. Position 708B may be the position farthest from the baseline B. The sensor 202 measures the distance to the hand at position 708B and compares it with the distance to the baseline B. For example, the measured distance to position 708B (e.g., 20 centimeters) is compared with the distance to the baseline B (e.g., 10 centimeters). The comparison between the distances at position 708A and position 708B provides a positive sign because the distance to position 708B is greater than the distance to the baseline B. The comparison value (e.g., 10 centimeters) is further compared with a predetermined threshold value (e.g., 3). When the comparison value is higher than the predetermined threshold value, the display device 210 displays the floor value as having the highest floor value of the building.

[0097] In one exemplary embodiment, when the sign of the comparison value is positive and the comparison value is above a predetermined threshold, the display device 210 displays the top floor of the building 102, such as the top floor 710 ("PH"). Additionally, or alternatively, the elevator service direction may be indicated in the visual guide 604. The visual guide 604 indicates an upward direction 712A of the elevator service and a moving level 712B of the elevator service.

[0098] Fig. 8A An I / O interface 800 for measuring the distance to a hand of a user 110 located within a line of sight 204 of a sensor 202 according to an exemplary embodiment of the present disclosure is shown. The sensor 202 may be an infrared sensor (hereinafter "IR sensor 202"). The IR sensor 202 radiates infrared light, which falls on an object (e.g., a hand of a user 110 located within the line of sight 204 of the IR sensor 202). The infrared light is reflected from the hand of the user 110 back to the IR sensor 202. The IR sensor 202 captures the reflected light and measures the distance to the hand of the user 110.

[0099] Some embodiments are based on the recognition that passive IR sensors (PIR sensors) provide effective and feasible distance measurement with minimal resource consumption. Therefore, in some embodiments, the IR sensor 202 can be a passive IR (PIR) sensor 202. The PIR sensor 202 can be configured to measure the radiant heat emitted from the hand of the user 110 at the position 804B, and determine the distance (D) to the hand based on the measured radiant heat. C )208B. The determined distance can be compared with the reference distance (D R )208A for comparison. In one exemplary embodiment, the reference distance (D R) 208A may correspond to the distance at the baseline B. In other exemplary embodiments, the reference distance (D R ) 208A may correspond to the distance to the hand at the initial position 804A. Based on the comparison, the target floor, such as floor value 808, is displayed on the display device 210.

[0100] In some other embodiments, the I / O interface 800 may include a red-green-blue-depth (RGBD) camera 802. The RGBD camera 802 may be configured to measure a depth map of the hand of the user 110 in front of the RGDB camera 802. In some other cases, the RGDB camera 802 may be attached to a side wall of the elevator 104. The depth map may be provided to the control system 116 as an additional input for contactless indication of the target floor when controlling the elevator 104.

[0101] In addition, or alternatively, the I / O interface 800 may include an audio interface 806 (e.g., a speaker) to provide confirmation of the floor selection to the user 110. For example, the audio interface 806 provides an audio confirmation to the user 110 regarding the selected floor (e.g., "Floor 2").

[0102] In some embodiments, the PIR sensor may include a pair of PIR sensors 812A and 812B, Figure 8B This is shown and described in . The pair of sensors can be located on the same side of hand 814 or on different sides.

[0103] Figure 8B An I / O interface 810 for measuring the distance to a hand of a user 110 that is within the line of sight 204 of a pair of PIR sensors 812A and 812B is shown according to another exemplary embodiment of the present disclosure.

[0104] The I / O interface 810 includes a pair of PIR sensors 812A and 812B. The pair of PIR sensors 812A and 812B can be mounted relative to each other at an angle pointing toward the hand. In some embodiments, the pair of PIR sensors 812A and 812B can sense the distance and state of the hand. When the hand is placed within the line of sight 204 of the pair of PIR sensors 812A and 812B, each of the PIR sensors 812A and 812B captures a thermal image of the hand at position 814. Figure 8B As shown in , PIR sensor 812A captures a thermal image (I1) of a hand, and PIR sensor 812B captures another thermal image (I2) of a hand. In each thermal image, the hand is in a different position due to the different directions of each of a pair of PIR sensors 812A and 812B.

[0105] In addition, the processor 118 can determine the image pixels corresponding to the hand in the thermal image. In some embodiments, the image pixels corresponding to the hand in the two thermal images can be determined based on a threshold. The threshold can correspond to a temperature, such as the temperature of the user 110. The temperature of the user 110 can be determined based on the thermal radiation of the user 110 captured by the pair of PIR sensors 812A and 812B. The processor 118 can further determine the difference between the center points of the image pixels and calculate the difference between the two positions of the hand in the thermal image based on the difference between the center points. In addition, based on the difference between the two positions of the hand in the thermal image, the distance between the hand and the pair of sensors 812A and 812B is calculated. The calculated distance can be compared with the reference distance at the baseline B. Therefore, the target floor 808 can be selected and displayed on the display device 210.

[0106] In some embodiments, when the user 110 first places his hand in front of the pair of PIR sensors 812A and 812B, the difference between the center points can be regarded as a reference distance (i.e., the distance initially sensed). In this case, the reference distance does not need to be at a fixed position (e.g., baseline B). In addition, the change in the position of the user's 110 hand from the pair of PIR sensors 812A and 812B is measured with respect to the reference distance to measure the change from the reference distance. Based on the change measured from the reference distance (i.e., the difference between the center points), the target floor is selected and displayed on the display device 210.

[0107] Fig. 9A and Fig. 9B A flow chart of a method 900 for controlling the operation of an elevator of a building is shown, according to an exemplary embodiment of the present disclosure. The method 900 includes operations 902 to 908 performed by the control system 116 using the processor 118.

[0108] At operation 902, a distance to an object located on a service floor within a line of sight of a sensor (e.g., sensor 202) is received. The object may be a hand of a user (e.g., user 110) in front of the sensor. The sensor may project light, and the user may place his or her hand in front of the sensor within the line of sight of the sensor. The sensor may measure the distance to the object based on the light reflected from the user's hand.

[0109] At operation 904, the received distance is compared with a reference distance to estimate a comparison value and a sign associated with the comparison value.

[0110] At operation 906, the floor value displayed on the display device is repeatedly updated until the termination condition is met. The floor value is updated at an update frequency indicated by the comparison value in the elevator service direction indicated by the comparison symbol. The update frequency corresponds to the floor value increasing or decreasing by an amount (i.e., the comparison value) per second. Each floor value is associated with each floor of the building. In some embodiments, the floor value is a series of integers.

[0111] At operation 908, the elevator is made to perform a service operation from the service floor to the target floor indicated by the floor value displayed when the termination condition is met. The termination condition is met when the comparison value is below the distance threshold for a period of time greater than the threshold time.

[0112] Fig.10 A block diagram of a control system 1000 for controlling the operation of an elevator (e.g., elevator 104) of a building (e.g., building 102) is shown according to an exemplary embodiment of the present disclosure. Control system 1000 corresponds to control system 116 of FIG. 1 . Control system 1000 includes a processor 1002, a memory 1004, a storage device 1006, and a sensor 1008. Memory 1004 may include random access memory (RAM), read-only memory (ROM), flash memory, or any other suitable memory system.

[0113] The processor 1002 may be a single core processor, a multi-core processor, a computing cluster, or any number of other configurations. In some implementations, the control system 1000 may have different types and combinations of interfaces, such as a human-machine interface 1012 for connecting to a camera 1024 .

[0114] The control system 1000 is configured to provide a contactless indication of a target floor in a group elevator control using a processor 1002. In some embodiments, the processor 1002 is configured to receive a distance indicator of an object located at a service floor within the line of sight of a sensor. The processor 1002 is also configured to compare the received distance indicator with a reference distance indicator to estimate a comparison sign and a comparison value. The processor 1002 is also configured to repeatedly update the floor value displayed on the display device in the elevator service direction indicated by the sign of the comparison value and at an update frequency indicated by the comparison value until a termination condition is met. The processor 1002 is further configured to cause the elevator to perform a service operation from the service floor to the target floor indicated by the floor value displayed when the termination condition is met. The termination condition is met when the comparison value is below a distance threshold for a time period greater than a threshold time.

[0115] The sensor 1008 is configured to provide a measured distance 1010 of an object (e.g., a hand of the user 110) located at a service floor in the building 102. In some embodiments, the sensor 1008 may correspond to an IR sensor, such as a pair of PIR sensors. In addition, or alternatively, the sensor 1008 may include a camera 1024. The camera 1024 may correspond to an RGBD camera, such as the RGDB camera 802. In one implementation, a human-machine interface 1012 within the control system 1000 connects the control system 1000 to the camera 1024. In addition, or alternatively, a network interface controller (NIC) 1016 may be adapted to connect the control system 1000 to a network 1028 via the bus 1014. Via the network 1028, the measured distance 1010 may be downloaded and stored in the storage device 1006 for further processing. In some cases, the measured distance 1010 may be provided to the processor 1002 via the network 1028. In one implementation, the measured distance 1010 may be received via an input interface 1018 of the control system 1000.

[0116] The control system 1000 may also include a display device 1022. The display device 1022 is configured to display a floor value indicating the target floor selected by the user 110. The display device 1022 may be connected to the control system 1000 via an output interface 1020. In addition, or alternatively, the output interface 1020 may include an audio interface (e.g., audio interface 806) that may provide an output of the selected target floor displayed on the display device 1022.

[0117] In some exemplary embodiments, the storage device 1006 can be configured to store the elevator service direction of the elevator 104, the comparison sign between the reference distance and the measured distance, the comparison value, the update frequency of the floor value displayed in the display device 1022, the termination condition of the update frequency, the time period, the distance threshold and the threshold time, etc.

[0118] Fig.11 FIG. 1 shows a scenario in which the operation of an elevator 1100 of a building is controlled by a control system according to an exemplary embodiment of the present disclosure. Fig.11As shown in FIG. 1 , the elevator 1100 is equipped with a sensor 1102 on the ceiling of the elevator 1100. The sensor 1102 corresponds to the sensor 202. In an illustrative example scenario, a user enters the elevator 1100. The user positions an object (e.g., his hand 1104) within the line of sight 1106 of the sensor 1102. The hand 1104 can move up or down within the line of sight 1106 to provide a non-contact input via the sensor 1102. The sensor 1102 measures the distance to the hand 1104. The measured distance of the hand 1104 is compared with a reference distance indicator. In an exemplary embodiment, the reference distance indicator can correspond to the distance from the sensor 1102 to the baseline B. The user can move his hand 1104 back and forth from the baseline B to provide a non-contact indication of the target floor for controlling the elevator 1100. When the hand 1104 is at the baseline B, no floor value is displayed on the display device (e.g., the display device 1108). In the case where the hand 1104 moves upward from the baseline B, the floor value can increase in a sequential manner. As the hand 1104 moves downward from the baseline B, the floor value may decrease in a sequential manner. This increment or decrement may be associated with an update frequency of the floor value that may be displayed on the display device 1108. When the hand 1104 is at the baseline B, the update frequency does not change. In one embodiment, when the hand 1104 moves below the baseline B, the floor value is displayed on the display device 1108, such as Fig.11 In this manner, control system 1000 provides contactless control of the elevator in an efficient and feasible manner.

Claims

1. A control system for controlling the operation of an elevator, the elevator being arranged to serve different floors of a building, the control system comprising: an input interface configured to receive a measurement of a distance indicator of an object located on a service floor within a line of sight of the sensor; an output interface configured to cause a display device to display a floor value indicating a target floor; A processor, the processor being configured to: comparing the received distance indicator with a reference distance indicator to estimate a comparison sign and a comparison value; repeatedly updating the floor value displayed on the display device in the elevator service direction indicated by the comparison symbol at an update frequency indicated by the comparison value until a termination condition is satisfied; and causing the elevator to perform a service operation from the service floor to the target floor indicated by the floor value displayed when the termination condition is satisfied, Wherein, when the comparison sign is negative and the comparison value is higher than a predetermined threshold, the processor causes the display device to display the street level, and Wherein, when the comparison sign is positive and the comparison value is higher than the predetermined threshold, the processor causes the display device to display the top floor.

2. The control system according to claim 1, in, When the received distance indicator is greater than the reference distance indicator so that the comparison sign is positive, the elevator service direction is an upward direction of the building starting from the service floor, and Wherein, when the received distance indicator is smaller than the reference distance indicator so that the comparison sign is negative, the elevator service direction is a downward direction of the building starting from the service floor.

3. The control system according to claim 1, wherein: Each update changes the displayed floor value in the elevator service direction, wherein the update frequency is proportional to the comparison value, so that a larger comparison value increases the update frequency relative to a lower comparison value, and wherein when the comparison value is below a distance threshold, the update frequency is zero.

4. The control system according to claim 1, wherein: The termination condition is met when the comparison value indicated by the difference between the received distance indicator and the reference distance indicator is below a distance threshold for a time period greater than a time threshold.

5. The control system according to claim 1, wherein: The floor values ​​associated with the floors of the building are a series of integers, and wherein smaller distance index values ​​correspond to lower floor values ​​in the floor values, and wherein the display device increases or decreases the integers sequentially when updating.

6. The control system according to claim 1, wherein: The object is a user's hand detected by the sensor, which is arranged at the service floor or at the elevator stopped at the service floor, thereby allowing the user to change the target floor by moving the hand within the line of sight of the sensor.

7. The control system according to claim 6, wherein: The sensor's line of sight is in a vertical direction, allowing the user to change the target floor by moving the hand up or down, or wherein the sensor's line of sight is in a horizontal direction, allowing the user to change the target floor by moving the hand backward or forward, or a combination of both.

8. The control system according to claim 6, wherein: The reference distance index is an initial distance to the hand detected by the sensor, thereby allowing the user to change the target floor by moving the hand relative to the initial position of the hand within the line of sight of the sensor.

9. The control system according to claim 8, wherein: The processor causes the display device to display the service floor when receiving the initial distance to the hand.

10. The control system according to claim 6, wherein: The line of sight of the sensor is in a vertical direction, thereby allowing a user to change the target floor by moving a hand up or down, wherein the reference distance indicator corresponds to a predetermined position of the hand above or below the sensor.

11. The control system according to claim 1, wherein: The sensor comprises an infrared IR sensor.

12. The control system according to claim 11, wherein: The IR sensor is a passive infrared (PIR) sensor configured to measure radiant heat emitted from the object.

13. The control system according to claim 12, in, The PIR sensor includes a pair of PIR sensors, and Wherein, each of the pair of PIR sensors is configured to capture a thermal image of the object.

14. The control system according to claim 1, wherein: The sensor includes a red, green, and blue (RGBD) depth camera that measures a depth map of the object in front of the RGBD camera.

15. A method for controlling the operation of an elevator, the elevator being arranged to serve passengers to different floors of a building, wherein: The method uses a processor in combination with stored instructions implementing the method, wherein the instructions, when executed by the processor, perform the steps of the method, comprising: receiving a measurement of a distance indicator of an object located on a service floor within a line of sight of the sensor; comparing the received distance indicator with a reference distance indicator to estimate a comparison sign and a comparison value; Repeatedly updating the floor value displayed on the display device in the elevator service direction indicated by the comparison symbol at an update frequency indicated by the comparison value until a termination condition is met; causing the elevator to perform a service operation from the service floor to a target floor indicated by a floor value displayed when the termination condition is satisfied; When the comparison sign is negative and the comparison value is higher than a predetermined threshold, causing the display device to display a street level; and When the comparison sign is positive and the comparison value is higher than the predetermined threshold, the display device is enabled to display the top floor.

16. The method according to claim 15, further comprising: When the received distance indicator is greater than the reference distance indicator so that the comparison sign is positive, the elevator service direction is an upward direction of the building starting from the service floor, and When the received distance indicator is smaller than the reference distance indicator so that the comparison sign is negative, the elevator service direction is a downward direction of the building starting from the service floor.

17. The method according to claim 15, further comprising: Based on each update, the displayed floor value is changed in the elevator service direction.

18. The method according to claim 15, further comprising: The termination condition is checked when the comparison value indicated by the difference between the received distance indicator and the reference distance indicator is below a distance threshold for a time period greater than a time threshold.

19. A control system for controlling the operation of an elevator, the elevator being arranged to serve different floors of a building, the control system comprising: an input interface configured to receive a measurement of a distance indicator of an object located on a service floor within a line of sight of a sensor, wherein the sensor comprises an infrared (IR) sensor, the IR sensor is a passive infrared (PIR) sensor configured to measure radiant heat emitted from the object, the PIR sensor comprises a pair of PIR sensors, and wherein each of the pair of PIR sensors is configured to capture a thermal image of the object; an output interface configured to cause a display device to display a floor value indicating a target floor; A processor, the processor being configured to: comparing the received distance indicator with a reference distance indicator to estimate a comparison sign and a comparison value; repeatedly updating the floor value displayed on the display device in the elevator service direction indicated by the comparison symbol at an update frequency indicated by the comparison value until a termination condition is satisfied; and causing the elevator to perform a service operation from the service floor to the target floor indicated by the floor value displayed when the termination condition is satisfied, The processor is further configured to: calculating respective positions of the object in the thermal image as center points of image pixels having values ​​above a predetermined threshold; calculating a distance to the object based on differences between various positions of the object in the thermal image; and The target floor is selected based on the calculated distance.

Images