Elevator group management method and system

Abstract

The invention discloses an elevator group management method, which is characterized in that an unallocated elevator taking request is allocated to an earliest return elevator, so that a time interval between a return moment when the earliest return elevator returns to a main landing after passenger transportation and a return moment of an adjacent elevator returning to the main landing is not less than a time threshold value. Or the horizontal distance between the position of the earliest return elevator on the main landing and the position of the adjacent elevator on the main landing is not smaller than the distance threshold value; the earliest return elevator refers to the elevator which returns to the main landing earliest. The technical problem to be solved by the invention is how to effectively prevent passengers from mistakenly entering a non-target elevator, and meanwhile, the calculation load of an elevator group management system in the elevator using peak period can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of elevators, in particular to an elevator group management method and system. BACKGROUND

[0002] For large passenger flow floors such as main landing, during peak hours, there will be passengers going to different floors in different directions at the same time. If the arrival time or distance of the elevators allocated to these different destination floors is too close, it is possible that passengers will misenter non-target elevators, resulting in a decrease in passenger elevator experience and a decrease in elevator operation efficiency.

[0003] Therefore, how to effectively avoid passenger misentry into non-target elevators has become a technical problem to be solved. SUMMARY

[0004] The technical problem to be solved by the present application is how to effectively avoid passenger misentry into non-target elevators, and at the same time effectively reduce the calculation load of the elevator group management system during peak hours.

[0005] In order to solve the above technical problems, the present application provides an elevator group management method, which allocates an unallocated elevator request to the earliest return elevator, so that the time interval between the return time of the earliest return elevator when it returns to the main landing again after completing passenger transportation and the return time of the adjacent elevator returning to the main landing is not less than a time threshold, or the horizontal distance between the position of the earliest return elevator at the main landing and the position of the adjacent elevator at the main landing is not less than a distance threshold; the earliest return elevator refers to the elevator that returns to the main landing earliest.

[0006] Preferably, the earliest return elevator satisfies the following conditions: condition one, the elevator request with the main landing as the departure floor is allocated; condition two, the elevator arrives at the main landing again after completing the elevator request; condition three, the running direction when the elevator arrives at the main landing again is consistent with the running direction when the elevator departs from the main landing after receiving the allocated elevator request; condition four, the arrival time is the earliest among all elevators that arrive at the main landing again.

[0007] Preferably, the elevator group management method estimates the return time of each elevator returning to the main landing according to elevator operation information, and determines the earliest return elevator according to the return time.

[0008] Preferably, the elevator group management method estimates the return time of each elevator when returning to the main landing according to a first time, a second time and a third time; the first time refers to the time required for the elevator to run from the main landing to the farthest destination floor at the rated speed and return to the main landing, which is calculated according to the distance between the farthest destination floor and the main landing and the rated running speed of the elevator; the second time refers to the additional moving time caused by all stops of the elevator, which is calculated according to the number of assigned destination floors; and the third time refers to the time consumed by passengers to get off the elevator, which is estimated according to the number of passengers corresponding to the assigned destination floors.

[0009] Preferably, the elevator group management method determines the return order of the earliest return elevator relative to other elevators when returning to the main landing again after completing its passenger transport according to at least one of the preset factors; the return order refers to the order relative to other elevators when returning to the main landing after completing the current passenger transport, or refers to the order relative to other elevators when returning to the main landing again after completing the current passenger transport and starting the transport again after the passenger boarding request currently assigned to the elevator enters the car; the preset factors include the number of waiting passengers, the passenger waiting time, the elevator running efficiency and the elevator power consumption.

[0010] Preferably, the group management method determines the return order of the earliest return elevator relative to other elevators when returning to the main landing again after completing its passenger transport among all return elevators according to the return time of each elevator, and determines the adjacent elevator of the earliest return main landing.

[0011] Preferably, the elevator group management method adjusts the return time of the earliest return elevator by adjusting the unassigned passenger boarding request assigned to the earliest return elevator.

[0012] Preferably, the adjustment of the unassigned passenger boarding request assigned to the earliest return elevator refers to the adjustment of the number of unassigned passenger boarding requests assigned to the earliest return elevator and the position of the destination floor in the main landing in the passenger boarding request, or the adjustment of the number of unassigned passenger boarding requests assigned to the earliest return elevator and the vertical distance between the farthest destination floor from the main landing and the main landing in the passenger boarding request.

[0013] Preferably, the elevator group management method adjusts the return order of the earliest return elevator relative to other elevators when returning to the main landing again after completing its passenger transport by adjusting the return time of the earliest return elevator, so as to change the adjacent elevator of the earliest return elevator.

[0014] Preferably, the elevator group management method adjusts the time interval between the return time of the earliest return elevator and the adjacent elevator by adjusting the return time of the earliest return elevator.

[0015] Preferably, the elevator group management method adjusts the horizontal distance between the position of the earliest return elevator at the main landing and the position of its adjacent elevator at the main landing by adjusting the adjacent elevator of the earliest return elevator.

[0016] Preferably, the time interval is not shorter than the time required for passengers to move from the boarding waiting area to the elevator farthest from the boarding waiting area or the time required for passengers to move to the earliest return elevator.

[0017] Preferably, the elevator group management method determines the boarding request allocation scheme according to the following steps:

[0018] Step S1, forming a boarding request allocation scheme for the earliest return elevator by selecting at least one boarding request from all unallocated boarding requests, the required resources of the boarding requests in the allocation scheme do not exceed the available resources of the earliest return elevator;

[0019] Step S2, estimating the time required for the car movement of the earliest return elevator from the main landing to return to the main landing after completing passenger transport under each allocation scheme;

[0020] Step S3, determining the adjacent elevator of the earliest return elevator and its time interval with the adjacent elevator according to the car movement time estimated in step S2;

[0021] Step S4, selecting the allocation scheme corresponding to the time interval that meets the preset condition as the candidate allocation scheme from all allocation schemes, the preset condition being that the time interval is not shorter than the time required for passengers to move from the boarding waiting area to the elevator farthest from the boarding waiting area or the time required for passengers to move to the earliest return elevator;

[0022] Step S5, selecting one of the candidate allocation schemes as the final allocation scheme for the boarding request of the earliest return elevator.

[0023] Preferably, step S5 selects the final allocation scheme for the boarding request of the earliest return elevator according to at least one of the preset principles; the preset principles include: time interval optimization principle, short passenger waiting time principle, high elevator operation efficiency principle, and low elevator power consumption principle.

[0024] Preferably, the time interval optimization principle refers to the time interval being the largest or closest to the passenger movement time required for passengers to move from the waiting area to the earliest return elevator.

[0025] Preferably, when multiple preset principles are simultaneously adopted, for each candidate allocation scheme, an evaluation index under each preset principle is established, a weighted sum of the evaluation indexes under each preset principle is taken as a total index of the candidate allocation scheme, and a final allocation scheme is selected according to the total index of each candidate allocation scheme.

[0026] Preferably, the evaluation index of the time interval optimization principle is a difference between the time interval and passenger moving time required for the passenger to move from the waiting area to the elevator farthest from the waiting area or to the elevator that returns earliest, or a ratio of the difference to the passenger moving time.

[0027] Preferably, the elevator group management method determines the elevator call allocation scheme according to the following steps:

[0028] Step S1, forming an elevator call allocation scheme for the elevator that returns earliest by selecting at least one elevator call from all unallocated elevator calls, and the resource required by the elevator call in the allocation scheme does not exceed the available resource of the elevator that returns earliest;

[0029] Step S2, estimating the car moving time required for the elevator that returns earliest to leave the main landing, complete passenger transport, and return to the main landing under each allocation scheme;

[0030] Step S3, determining the adjacent elevator of the elevator that returns earliest according to the car moving time estimated in step S2;

[0031] Step S4, determining the horizontal distance between the position of the adjacent elevator at the main landing and the position of the elevator that returns earliest at the main landing;

[0032] Step S5, selecting, from each allocation scheme, an allocation scheme in which the horizontal distance is not less than a distance threshold as a candidate allocation scheme;

[0033] Step S6, selecting one of the candidate allocation schemes as a final allocation scheme for the elevator call of the elevator that returns earliest.

[0034] Preferably, step S6 selects the final allocation scheme for the elevator call of the elevator that returns earliest according to at least one of the preset principles; the preset principles include: distance optimization principle, short passenger waiting time principle, high elevator operation efficiency principle, and low elevator power consumption principle.

[0035] Preferably, the distance optimization principle refers to the horizontal distance being the largest or closest to the distance threshold.

[0036] Preferably, when multiple preset principles are simultaneously adopted, an evaluation index under each preset principle is established for each candidate allocation scheme, a weighted sum of the evaluation indexes under each preset principle is taken as a total index of the candidate allocation scheme, and a final allocation scheme is selected according to the total index of each candidate allocation scheme.

[0037] Preferably, the evaluation index of the distance optimization principle is a difference between the horizontal distance and a maximum horizontal distance between all elevators or a ratio of the difference to the maximum horizontal distance.

[0038] Preferably, the elevator group management method monitors the return time of each elevator, and takes a time at which the car moving time of the earliest return elevator is longer than the time threshold as a time at which the earliest return elevator is allocated with a boarding request.

[0039] Compared with the prior art, the present application takes the earliest arrival elevator as the main line, selects a reasonable boarding request signal from the existing unallocated boarding request signals for the earliest arrival elevator, and allocates the selected boarding request signal to the earliest arrival elevator. In the allocation mode of the above technical solution of the present application, the selection range is all existing unallocated boarding request signals, the selected object is the selected boarding request signal, and the allocation target is the earliest arrival elevator. It can be seen that the mechanism is completely different from that of the prior art. Since the number of boarding request signals in a unit time during a peak use period is much higher than the number of elevators arriving at the main landing, the group management method of the present application can effectively reduce the calculation load of the elevator group management system. In addition, the expansion of the selection range in the allocation process greatly increases the number of allocation schemes that can be formed, so that the final allocation scheme is more reasonable, and the operation efficiency of the elevator is higher.

[0040] In addition, by reasonably selecting the unallocated boarding request signal, the time interval of each elevator arriving at the main landing and / or the distance between adjacent elevators arriving at the main landing is ensured, so that the passengers taking different elevators are separated, and the passengers taking non-target elevators are avoided.

[0041] Meanwhile, the present application also provides an elevator group management system which can determine a reasonable time for starting allocation of the elevator group management.

[0042] The present application provides an elevator group management system, comprising:

[0043] A destination floor information receiving unit is configured to receive a boarding request of a passenger, wherein the boarding request comprises at least destination floor information registered by the passenger;

[0044] An elevator operation information obtaining unit is configured to obtain elevator operation information;

[0045] an estimation unit configured to estimate, based on the elevator operation information, a car movement time required for each elevator to return to the main landing;

[0046] a determination unit configured to determine, based on the car movement time output by the estimation unit, an earliest return elevator that returns to the main landing earliest among the elevators, the maximum value of the car movement time of the earliest return elevator being not less than a time threshold value;

[0047] a selection unit configured to select a distribution timing, the distribution timing being a timing for starting distribution of unassigned boarding requests to the earliest return elevator;

[0048] a distribution unit configured to distribute, at the distribution timing, unassigned boarding requests to the earliest return elevator;

[0049] a notification unit configured to notify the distribution result to passengers.

[0050] Preferably, the time threshold value is a passenger movement time required for a passenger to move from a boarding waiting area to an elevator that is farthest from the boarding waiting area or to the earliest return elevator.

[0051] Preferably, the distribution unit distributes unassigned boarding requests to the earliest return elevator using any of the aforementioned elevator group management methods.

[0052] Preferably, the selection unit monitors the return timing of each elevator and regards a timing at which the car movement time of the earliest return elevator is longer than the time threshold value as a timing for distributing a boarding request to the earliest return elevator.

[0053] Compared with the prior art, the elevator group management system of the present application makes full use of the feature that elevator group management is based on elevators that reach the main landing, and directly uses the car movement time of the earliest arrival elevator and the passenger movement time required for a passenger to move from a waiting area to an elevator to directly determine the optimal timing for starting distribution. This method is simple, convenient, and accurate. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 FIG. 1 is a schematic diagram of an elevator system in a building. DETAILED DESCRIPTION

[0055] Other advantages and benefits of the present application will be apparent to those skilled in the art from the disclosure hereof. The specific embodiments shown and described herein are meant to be illustrative only and changes may be made thereto without departing from the spirit of the application. Various modifications of the application can be made by those skilled in the art without departing from the spirit and scope of the application, which is defined by the appended claims.

[0056] Embodiment One

[0057] The present embodiment is mainly aimed at the following shortcomings of the existing elevator group management system:

[0058] 1) Namely, the elevator request is the main line, and each time a new elevator request signal is received, the object elevator is selected from all elevators in the group management system to respond to the elevator request signal, that is, all elevators in the group management system are selected as the selection range, the selected object elevator is selected as the selected object, and the elevator request signal (i.e. the passenger) is selected as the distribution target. Such a mode makes the calculation load too large in certain occasions such as peak use (at this time, the number of elevator request signals per unit time increases greatly, much more than the number of elevators arriving at the main landing per unit time);

[0059] 2) The process from the passenger registering the elevator request signal to the passenger actually entering the elevator car is often time-consuming. The response elevator allocated by the elevator group management system based on the elevator running information when the passenger registers the elevator request signal is no longer the optimal response elevator or even a poor choice when the passenger enters the car because the elevator running information may have changed greatly, thereby leading to poor elevator running efficiency, passenger elevator experience, etc. Even if the allocation of the elevator is delayed for a certain period of time after receiving the passenger's registered elevator request signal, although it can alleviate the degree of this shortcoming to some extent, it does not help with shortcoming 1).

[0060] In view of the shortcomings of the prior art, the elevator group management system provided by the present embodiment comprises:

[0061] a destination floor information receiving unit for receiving an elevator request of a passenger, the elevator request comprising at least destination floor information registered by the passenger;

[0062] an elevator running information obtaining unit for obtaining elevator running information;

[0063] an estimation unit for estimating a car moving time required for each elevator to return to the main landing according to the elevator running information;

[0064] a determination unit for determining an earliest return elevator that returns to the main landing earliest from among the elevators according to the car moving time output by the estimation unit, the maximum value of the car moving time of the earliest return elevator being not less than a time threshold value;

[0065] a selection unit for selecting a distribution time, the distribution time being a time for starting to distribute the elevator request that has not been distributed to the earliest return elevator;

[0066] a distribution unit for distributing the elevator request that has not been distributed to the earliest return elevator at the distribution time.

[0067] The notification unit is used to notify the passenger of the allocation result.

[0068] Preferably, the time threshold is the passenger movement time required for a passenger to move from the elevator waiting area to the elevator farthest from the elevator waiting area or to the earliest return elevator.

[0069] like Figure 1 As shown in the figure, a 30-story office building with its main landing on the ground floor is located at the bottom, and the destination floor registration device is installed at the main landing. The office building has a total of six elevators with a rated passenger capacity of 18 people, located on both sides of the long sides of the rectangular elevator lobby. The destination floor registration device is a rolling mill at the building entrance. The passenger waiting area is located between the rolling mill and the elevators, near the elevators. The elevator waiting area is the short side of the rectangular elevator lobby near the rolling mill.

[0070] The following uses this scenario as an example to illustrate the working process of the elevator group management system of this embodiment.

[0071] Assume that at time k during the peak elevator usage period starting at 8:30 and ending at 9:10 in the morning, elevator A goes up to the 5th floor and there is a floor to be stopped ahead, elevator B goes up to the 18th floor and there is a floor to be stopped ahead, elevator C goes up to the 28th floor and there is no floor to be stopped ahead and will return to the 1st floor at the 29th floor, elevator D goes down to the 25th floor and there is no floor to be stopped ahead except the 1st floor, elevator E goes down to the 20th floor and there is no floor to be stopped ahead except the 1st floor, and elevator F goes down to the 10th floor and there is no floor to be stopped ahead except the 1st floor.

[0072] The elevator operation information acquisition unit of the group management system acquires the operation information of the elevators, such as the positions, operation directions, and information of floors to be stopped of the respective elevators. The destination floor information receiving unit receives the destination floor information registered by the passengers through the card readers. The estimation unit estimates the elevator moving time required for the respective elevators to return to the main landing based on the current positions, operation directions, and information of floors to be stopped of the respective elevators in the operation information, such as 50 seconds for the A elevator, 35 seconds for the B elevator, 20 seconds for the C elevator, 17 seconds for the D elevator, 12 seconds for the E elevator, and 10 seconds for the F elevator. The determination unit selects the earliest return elevator that returns to the main landing earliest from the respective elevators based on the estimation result of the estimation unit and a set value. Note that, in selecting the earliest return elevator, the selected earliest return elevator should be the elevator that requires the shortest time among the elevators that require a longer time than the set value to return to the main landing. Assuming that the set value is 10 seconds, the earliest return elevator determination unit selects the F elevator as the earliest return elevator. The set value (i.e., the time threshold) can be a constant value, such as the maximum passenger moving time required for the passengers to move from the waiting area to the elevator, which is actually the passenger moving time required to move to the elevator farthest from the moving area (here, the C elevator or the F elevator), or the passenger moving time required for the passengers to move from the waiting area to the position of the elevator that arrives earliest.

[0073] When the set value is the passenger moving time required for the passengers to move from the waiting area to the position of the elevator that arrives earliest, the earliest arriving elevator is not determined at this time, and therefore a trial method is used. That is, the elevators are arranged in order of the time required to return to the main landing from short to long, and the elevator requiring the shortest time that has not been selected is selected as the earliest return elevator if the time required to return to the main landing is longer than the passenger moving time required for the passengers to move from the waiting area to the elevator, and the selection is repeated if not.

[0074] Actually, the following method can also be used. That is, the car moving time of each elevator is compared with the passenger moving time corresponding to the elevator (i.e., the passenger moving time required for the passengers to move from the waiting area to the elevator) based on the estimation result of the estimation unit, a candidate elevator list is created from the elevators that require a longer time, and the elevator corresponding to the shortest car moving time is selected as the earliest return elevator from the list.

[0075] The selecting unit selects the allocation time. If the passenger movement times required for passengers to move from the waiting area to the elevators A to F are 6 seconds, 8 seconds, 10 seconds, 6 seconds, 8 seconds and 10 seconds respectively, the selecting unit should select the time at which the car movement time of the elevator is not later than a fixed set value (for example, 10 seconds as mentioned above) or the time at which the elevators A to F are not later than 6 seconds, 8 seconds, 10 seconds, 6 seconds, 8 seconds and 10 seconds respectively as the allocation time. Here, the time corresponding to 10 seconds.

[0076] The allocating unit allocates the unallocated elevator call request to the earliest return elevator at the allocation time; and the informing unit informs the passengers of the allocation result.

[0077] The selecting unit monitors the return time of each elevator and selects the time at which the car movement time of the earliest return elevator is longer than the time threshold as the time at which the elevator call request is allocated to the earliest return elevator.

[0078] It should be noted that once the earliest return elevator is selected, the allocating unit allocates the elevator call request signal to the elevator, at which time the estimating unit re-estimates the return time of the elevator after it completes the allocated elevator call request (i.e., the time required for the elevator to reach the main landing, for the passengers to enter the car, for the elevator to transport the passengers and then to return to the main landing again) and updates the previous result with the estimation result and reorders the results. With such a processing step, as long as the estimation, updating, earliest elevator selection and allocation of the elevator call request signal are performed in time, the phenomenon that the elevator has no allocated elevator call request but the car movement time is shorter than the passenger movement time will not occur.

[0079] The elevator group management system of the embodiment takes full advantage of the feature of the group management system that the earliest arrival elevator is the main line rather than the elevator call request as in the prior art (when the elevator call request is the main line, the passenger movement time corresponding to the response elevator cannot be determined because the response elevator is not determined, so the allocation cannot be performed at the optimal time (i.e., the latest time)).

[0080] In addition, the specific method of how to select a reasonable elevator call request combination from the unallocated elevator call requests and allocate it to the earliest arrival elevator can be found in Embodiment Two.

[0081] Embodiment Two

[0082] The elevator group management method of the application is directed to the elevator that returns to the main landing earliest, i.e., the earliest return elevator.

[0083] assign a non-assigned boarding request to an earliest return elevator, so that a time interval between a return time of the earliest return elevator when it returns to the main landing again after completing passenger transport and a return time of an adjacent elevator of an adjacent return main landing is not less than a time threshold, or so that a horizontal distance between a position of the earliest return elevator at the main landing and a position of the adjacent elevator at the main landing is not less than a distance threshold; the earliest return elevator refers to an elevator that returns to the main landing earliest, so as to separate passengers of different target elevators, thereby avoiding passengers from entering a non-target elevator car.

[0084] The earliest return elevator satisfies the following conditions:

[0085] Condition one, the boarding request with the main landing as a departure floor is assigned; condition two, the main landing is reached again after the boarding request is completed; condition three, the running direction when the main landing is reached again is consistent with the running direction when the main landing is departed after receiving the assigned boarding request; and condition four, the arrival time is earliest among all elevators that reach the main landing again.

[0086] The elevator group management method estimates the return time (this time of transport) of each elevator to return to the main landing according to elevator running information (mainly the running direction, the current car position, and the to-be-stopped floor, etc.), and determines the earliest return elevator according to the return time.

[0087] The group management method estimates the return time of each elevator to return to the main landing according to a first time, a second time, and a third time.

[0088] The first time refers to a time required for an elevator to run at a rated speed from the main landing to the farthest destination floor and return to the main landing, which is calculated according to the distance between the farthest destination floor and the main landing and the rated running speed of the elevator.

[0089] The second time refers to an additional increased moving time caused by all stops of the elevator, which is calculated according to the number of assigned destination floors; for example, the additional increased moving time caused by all stops is calculated according to the number of assigned destination floors (here, the destination floor refers to different destination floors, and the same destination floor is not counted repeatedly) (once for each stop and acceleration and deceleration). The additional increased moving time caused by a single stop can be calculated according to the time required for the elevator to spend more due to the acceleration and deceleration process in the process of starting from the stopped floor and starting from the stopped floor, relative to the moving distance corresponding to the acceleration and deceleration process at the rated speed.

[0090] The third time refers to the time consumed by passengers to get off the elevator, which is estimated according to the number of passengers corresponding to the assigned destination floor.

[0091] The elevator group management method determines the return order of the earliest return elevator relative to other elevators when the elevator returns to the main landing again after completing its passenger transport according to at least one of the preset factors; wherein the return order refers to the order relative to other elevators when the elevator returns to the main landing after completing the current passenger transport (this return), or refers to the order relative to other elevators when the elevator returns to the main landing after completing the current passenger transport and completing the transport again after the current passenger transport request has been assigned to the elevator and the car starts; the preset factors include the number of waiting passengers, the passenger waiting time, the elevator operation efficiency and the elevator power consumption.

[0092] The group management method determines the return order of the earliest return elevator relative to other elevators when the elevator returns to the main landing again after completing its passenger transport among all return elevators according to the return time of each elevator, and determines the adjacent elevator of the earliest return main landing.

[0093] The elevator group management method adjusts the return time of the earliest return elevator by adjusting the unassigned passenger transport requests assigned to the earliest return elevator.

[0094] Preferably, the adjustment of the unassigned passenger transport requests assigned to the earliest return elevator refers to the adjustment of the number of unassigned passenger transport requests assigned to the earliest return elevator and the position of the destination landing in the main landing, or the adjustment of the number of unassigned passenger transport requests assigned to the earliest return elevator and the vertical distance between the farthest destination landing from the main landing and the main landing in the passenger transport request.

[0095] Preferably, the elevator group management method adjusts the return order of the earliest return elevator relative to other elevators when the elevator returns to the main landing again after completing its passenger transport by adjusting the return time of the earliest return elevator, so as to change the adjacent elevator of the earliest return elevator.

[0096] Preferably, the elevator group management method adjusts the time interval between the return time of the earliest return elevator and the adjacent elevator by adjusting the return time of the earliest return elevator. The time interval is not shorter than the time required for a passenger to move from the passenger waiting area to the elevator farthest from the passenger waiting area or to the earliest return elevator.

[0097] Preferably, the elevator group management method adjusts the horizontal distance between the position of the earliest return elevator in the main landing and the position of the adjacent elevator in the main landing by adjusting the adjacent elevator of the earliest return elevator.

[0098] Illustratively, the elevator group management method determines the passenger transport request assignment scheme according to the following steps:

[0099] Step S1, forming a passenger call request allocation scheme for the earliest return elevator by selecting at least one passenger call request from all unallocated passenger call requests, the required resource of the passenger call request in the allocation scheme not exceeding the available resource of the earliest return elevator;

[0100] Step S2, estimating the car moving time of the earliest return elevator from the main landing to the main landing after completing passenger transport under each allocation scheme;

[0101] Step S3, determining the adjacent elevator of the earliest return elevator and the time interval thereof according to the car moving time estimated in step S2;

[0102] Step S4, selecting the allocation scheme corresponding to the time interval satisfying the preset condition as the candidate allocation scheme from all allocation schemes, the preset condition being that the time interval is not shorter than the passenger moving time from the passenger waiting area to the elevator farthest from the passenger waiting area or the time required for moving to the earliest return elevator;

[0103] Step S5, selecting one of the candidate allocation schemes as the final allocation scheme for the passenger call request of the earliest return elevator.

[0104] The required resource refers to the required resource occupied by the passenger when taking the elevator. The available resource refers to the available resource currently provided by the elevator to the passenger. For example, when two transfer passengers carry a large carrying object, the required resource occupied by the passenger when taking the elevator is the boarding area, so in this case, the required resource refers to the boarding area required to be occupied by the passenger, and the available resource refers to the boarding area currently available for the passenger to occupy in the elevator car. The boarding area required by a single passenger is a standard value a1, and the boarding area required by the carrying object is determined by the length and width (a2 and a3) of the rectangle that can accommodate the carrying object. For the elevator, the available resource (i.e., the boarding area) that can be provided to the transfer passengers can be obtained by processing the image data reflecting the space occupation in the car through a camera arranged in the car by a suitable algorithm. Further reference can be made to the published patent documents CN202010295007.6 and CN201910609480.4.

[0105] Step S5 selects the final allocation scheme for the passenger call request of the earliest return elevator according to at least one of the preset principles; the preset principles include: time interval optimization principle, short passenger waiting time principle, high elevator operation efficiency principle, and low elevator power consumption principle.

[0106] The time interval optimization principle refers to the time interval being the largest or closest to the passenger moving time required for the passenger to move from the waiting area to the earliest return elevator.

[0107] When multiple preset principles are simultaneously adopted, for a to-be-selected allocation scheme, an evaluation index under each preset principle is established, a weighted sum of the evaluation indexes under each preset principle is taken as a total index of the to-be-selected allocation scheme, and a final allocation scheme is selected according to the total index of each to-be-selected allocation scheme.

[0108] The evaluation index of the time interval optimal principle is a difference between the time interval and passenger moving time required for the passenger to move from the waiting area to an elevator farthest from the waiting area or to an earliest return elevator, or a ratio of the difference to the passenger moving time.

[0109] Another exemplary elevator group management method determines a landing request allocation scheme according to the following steps:

[0110] Step S1, a landing request allocation scheme facing the earliest return elevator is formed by selecting at least one landing request in all unallocated landing requests, and a resource required by the landing request in the allocation scheme does not exceed a resource provided by the earliest return elevator;

[0111] Step S2, a car moving time required for the earliest return elevator to move from the main landing to return to the main landing after completing passenger transport is estimated under each allocation scheme;

[0112] Step S3, a neighboring elevator of the earliest return elevator is determined according to the car moving time estimated in step S2;

[0113] Step S4, a horizontal distance between the position of the neighboring elevator at the main landing and the position of the earliest return elevator at the main landing is determined;

[0114] Step S5, an allocation scheme in which the horizontal distance is not less than a distance threshold is selected as a to-be-selected allocation scheme in each allocation scheme;

[0115] Step S6, one of the to-be-selected allocation schemes is selected as a final allocation scheme of the landing request facing the earliest return elevator.

[0116] Step S6 selects, as the final allocation scheme of the landing request facing the earliest return elevator, according to at least one of preset principles; the preset principles include a distance optimal principle, a short passenger waiting time principle, a high elevator operation efficiency principle, and a low elevator power consumption principle. The distance optimal principle refers to the largest horizontal distance or the horizontal distance closest to the distance threshold.

[0117] When multiple preset principles are simultaneously adopted, for a to-be-selected allocation scheme, evaluation indexes under each preset principle are respectively established, a weighted sum of the evaluation indexes under each preset principle is taken as a total index of the to-be-selected allocation scheme, and a final allocation scheme is selected according to the total index of each to-be-selected allocation scheme. The evaluation index of the distance best principle is a difference between the horizontal distance and a maximum horizontal distance between all elevators or a ratio of the difference to the maximum horizontal distance.

[0118] Preferably, the elevator group management method monitors the return time of each elevator, and takes a time at which the car moving time of the earliest return elevator is longer than the time threshold as a time at which a boarding request is allocated to the earliest return elevator.

[0119] The embodiment separates passengers who ride different elevators by adjusting time intervals. It should be noted that the main landing in the claims and the foregoing description refers to a large passenger flow floor, which can be a bottom floor located at the lowermost end of all floors, or a certain intermediate floor located at a non-end layer. When the main landing is the bottom end layer, the elevator that returns to the main landing earliest refers to an elevator that, after completing the transportation of passengers inside, travels downward (and can even transport downward passengers to their destination floor during the downward travel) to the bottom end layer, and the elevator will reverse direction. When the main landing is an intermediate layer, the elevator that returns to the main landing earliest can either travel in a first direction, complete the transportation of passengers in that direction, and then travel in a second direction opposite the first direction to the intermediate layer (in which case the direction of elevator travel is the second direction), or travel to the main landing with the direction of travel being the first direction (possibly stopping at the main landing after traveling in the second direction and reversing the direction of travel, or possibly traveling beyond the main landing in the second direction to complete the transportation of relevant passengers and then reversing the direction of travel to travel to the main landing again in the first direction).

[0120] Using the example of Embodiment One, at time k during the peak boarding period from 8:30 to 9:10 in the morning, 8 passengers with a destination floor of 10, 10 passengers with a destination floor of 16, 5 passengers with a destination floor of 21, and 12 passengers with a destination floor of 28 are added. A plurality of to-be-selected allocation schemes are generated according to the foregoing method, and then one of the schemes is selected as the final allocation scheme.

[0121] The application has been described in detail by specific embodiments, and the above embodiments are merely preferred embodiments of the application. The application is not limited to the above embodiments. Equivalent substitutions and improvements made by those skilled in the art without departing from the principles of the application should be considered within the scope of the application.

Claims

1. An elevator group management system, characterized in that: The group management system includes: a destination floor information receiving unit, configured to receive a passenger's elevator request, wherein the elevator request at least includes the destination floor information registered by the passenger; An elevator operation information acquisition unit, used to acquire elevator operation information; an estimating unit, configured to estimate the car travel time required for each elevator to return to the main landing station based on the elevator operation information; a determining unit for selecting an earliest return elevator that returns to the main landing station earliest from each elevator based on the car travel time output by the estimating unit and a set value, wherein the maximum value of the car travel time of the earliest return elevator is not less than a time threshold; A selecting unit, configured to select an allocation time, wherein the allocation time is a time for starting to allocate an unallocated elevator request to the earliest return elevator; an allocating unit for allocating unallocated boarding requests to the earliest return elevator at the allocation time; ensuring that the time interval between the return time of the earliest return elevator when it returns to the main landing after completing passenger transportation and the return time of an adjacent elevator returning to the main landing is not less than a time threshold, or ensuring that the horizontal distance between the position of the earliest return elevator at the main landing and the position of the adjacent elevator at the main landing is not less than a distance threshold; The notification unit is used to notify the passenger of the allocation result of the allocation unit on the elevator request.

2. The elevator group management system according to claim 1, characterized in that: The set value is taken as the passenger travel time from the waiting area to the location of the earliest arriving elevator; The method by which the determining unit selects the earliest return elevator that returns to the main landing station the earliest is as follows: the elevators are arranged from shortest to longest according to the time required for returning to the main landing station, starting with the elevator with the shortest return time that has not been selected, and determining whether its return time is longer than the passenger travel time required for the passenger to move from the waiting area to the elevator; if so, the elevator is selected as the earliest return elevator; otherwise, the elevator with the shortest return time that has not been selected is selected again.

3. The elevator group management system according to claim 1, characterized in that: The set value is taken as the passenger travel time from the waiting area to the location of the earliest arriving elevator; The method by which the determining unit selects the earliest returning elevator that returns to the main landing station earliest is: Based on the car travel time required for each elevator to return to the main landing estimated by the estimation unit, the car travel time of each elevator is first compared with the passenger travel time corresponding to the elevator. Then, a candidate elevator list is established consisting of elevators whose car travel time is longer than the passenger travel time corresponding to the elevator. Finally, the elevator corresponding to the shortest car travel time is selected from the list as the earliest returning elevator.

4. The elevator group management system according to claim 1, characterized in that: The time threshold is the passenger movement time required for the passenger to move from the elevator waiting area to the elevator farthest from the elevator waiting area or to the earliest return elevator.

5. The elevator group management system according to claim 1, characterized in that: The selection unit monitors the return time of each elevator and uses the time when the car movement time of the earliest returning elevator is longer than the time threshold as the time to assign the boarding request to the earliest returning elevator.

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