Elevator group management method and system for low passenger flow period

Abstract

The application discloses a kind of low passenger flow period's elevator group management method and system, and elevator application technical field, including the following steps: based on landing call signal, the passenger waiting time index of each elevator is calculated;The standby floor proximity index of each elevator is calculated;Based on the passenger waiting time index and the standby floor proximity index, the comprehensive evaluation index of each elevator is calculated;The elevator before going to service the landing call of minimum comprehensive evaluation value is selected;The comprehensive evaluation index considered by the application considers passenger waiting time index and standby floor proximity index, and the standby floor proximity index value of elevator close to standby floor is always greater than the standby floor proximity index value of elevator away from standby floor, so as to solve how to reduce the quantitative calculation problem of the probability that elevator on standby floor is taken as landing call allocation elevator, which helps to reduce elevator energy consumption caused by future standby scheduling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator application, and particularly relates to an elevator group management method and system in a low passenger flow period. BACKGROUND

[0002] The basic function of an elevator group management system is to assign the most suitable elevator from the elevator group to go to the floor where the call is generated when a landing call is generated. The assignment is usually based on evaluating each candidate elevator according to a certain evaluation index, and the candidate elevator with the smallest evaluation index value is selected as the assigned elevator. The evaluation index is usually calculated based on the current operating state of each elevator and the landing call state, and some documents have proposed evaluation indexes that add future state-based influence items.

[0003] For example, the elevator group management control device proposed in patent document 1 with the application number CN97195329.5 predicts the car position from the current position, calculates the distribution of possible service times (predicted arrival time of the car that can respond to the landing call earliest), corrects the assignment evaluation value, and reduces the unevenness of service by achieving the uniformization of the possible service times for each floor. The evaluation index used in this document is the sum of the passenger waiting time calculated based on the current state and the correction value calculated based on the distribution of possible service times after a specified time.

[0004] For example, the elevator group management control method and device proposed in patent document 2 with the application number CN200980152488.7 uses the expected value of the waiting time of all passengers (expected value of the sum or average of the waiting time) for each floor direction as the evaluation index for newly generated waiting place calls, which is calculated using the estimated value of the arrival rate of passengers for each floor direction, the estimated value of the waiting place call generation rate of the group as a whole, and the predicted arrival time of each elevator car. This document uses the expected value of the sum or average of the waiting time of all passengers generated based on the arrival rate in all stay positions within a specified time in the future as a general evaluation index.

[0005] For example, the elevator group management system proposed in patent document 3 with the application number CN201510079226.X uses the predicted arrival time of the car for the landing hall call as the evaluation value based on the current state of the call and the prediction of the future call.

[0006] The influence item on the future state proposed in the above documents is directed to the waiting passengers and their calls that may be generated in the future, thereby leading to the future passenger waiting time, and does not involve the newly added elevator energy consumption generated by the automatic scheduling of the group control system in the future due to the current assignment.

[0007] However, during the low passenger flow period of the building, when there is no elevator operation within a predetermined time (for example, 20 seconds), the group control system usually enters a decentralized standby service mode, specifically, all floors are divided into multiple intervals and a standby floor is set for each interval, and each elevator is dispersed to each interval and makes the standby floor at least one elevator without direction closing standby. When the group control system has been in the decentralized standby service mode, if a certain landing call is generated, and the elevator located at a certain standby floor is assigned to serve the landing call and leave the standby floor, after the elevator serves and stops running for a predetermined time (for example, 20 seconds), the group control system will dispatch an elevator to the standby floor for standby, thereby generating new elevator energy consumption. As can be seen, the elevator located at the standby floor should be carefully selected to serve the landing call during the low passenger flow period. SUMMARY

[0008] The purpose of the present application is to provide an elevator group management method and system during a low passenger flow period, which solves the following technical problems:

[0009] How to reduce the quantitative calculation of the probability of the elevator located at the standby floor being assigned as the landing call, and reduce the elevator energy consumption caused by future standby scheduling.

[0010] The purpose of the present application can be achieved by the following technical solutions:

[0011] An elevator group management method during a low passenger flow period, comprising the following steps:

[0012] Based on the landing call signal, the passenger waiting time index of each elevator is calculated;

[0013] The standby floor proximity index of each elevator is calculated;

[0014] Based on the passenger waiting time index and the standby floor proximity index, the comprehensive evaluation index of each elevator is calculated;

[0015] The elevator with the smallest comprehensive evaluation value is selected to serve the landing call.

[0016] Preferably, the passenger waiting time is the time from the occurrence of the landing call to the time when the elevator arrives at the floor where the landing call is generated and opens the car door.

[0017] Wherein, the passenger waiting time index is obtained by normalizing the passenger waiting time.

[0018] Preferably, the calculation formula of the passenger waiting time index is:

[0019]

[0020]

[0021] wherein, t r is the passenger waiting time of the rth elevator when responding to the call of the landing; R is the set of elevators in the group; t max is the maximum value of the passenger waiting time of each elevator; T r is the passenger waiting time index of the rth elevator after normalization.

[0022] Preferably, the calculation formula of the standby landing proximity index is:

[0023]

[0024]

[0025]

[0026]

[0027] wherein, Z is the number of intervals, i.e. the number of standby landings; d r,j is the distance of the rth elevator to the standby landing of the jth interval; D r is the average distance of the rth elevator to the standby landing of each interval; s r is the standby landing proximity of the rth elevator; R is the set of elevators in the group; s max is the maximum value of the standby landing proximity of each elevator; S r is the standby landing proximity index of the rth elevator after normalization.

[0028] Preferably, the standby landing proximity is calculated based on the average distance of the elevator to each standby landing, and the variance of the distance of the elevator to each standby landing.

[0029] wherein, the standby landing proximity index is obtained by normalizing the standby landing proximity.

[0030] Preferably, the comprehensive evaluation index is obtained by weighted calculation of the passenger waiting time index and the standby landing proximity index.

[0031] Preferably, the calculation formula of the comprehensive evaluation index is:

[0032] E r = T r *w1 + S r *w2

[0033] wherein, T r is the passenger waiting time index of the rth elevator; w1 and w2 are weight values, and the sum of the two is 1.

[0034] Preferably, the passenger waiting time index is given a greater weight relative to the standby floor proximity index, and w1> w2 in the calculation formula of the comprehensive evaluation index.

[0035] An elevator group management system in a low passenger flow period, comprising:

[0036] An acquisition module for acquiring a landing call signal;

[0037] A first processing module for calculating a passenger waiting time index of each elevator;

[0038] A second processing module for calculating a standby floor proximity index of each elevator;

[0039] A third processing module for calculating a comprehensive evaluation index of each elevator based on the passenger waiting time index and the standby floor proximity index;

[0040] An execution module for selecting an elevator with the minimum comprehensive evaluation value to serve the landing call.

[0041] The beneficial effects of the present application are:

[0042] (1) The comprehensive evaluation index considers the passenger waiting time index and the standby floor proximity index, and the standby floor proximity index value of an elevator close to the standby floor is always greater than that of an elevator far from the standby floor, thereby solving the quantitative calculation problem of how to reduce the probability of an elevator at the standby floor being assigned as a landing call distribution elevator, and helping to reduce the elevator energy consumption caused by future standby scheduling;

[0043] (2) Based on the landing call signal, the passenger waiting time index of each elevator is calculated, the standby floor proximity index of each elevator is calculated, the comprehensive evaluation index of each elevator is calculated based on the passenger waiting time index and the standby floor proximity index, and an elevator with the minimum comprehensive evaluation value is selected to serve the landing call. BRIEF DESCRIPTION OF DRAWINGS

[0044] The present application will be further described below with reference to the accompanying drawings.

[0045] Figure 1 is a flowchart of a low passenger flow period elevator group management method of the present application;

[0046] Figure 2 is a flowchart of an example in a low passenger flow period elevator group management method of the present application Figure 1 ;

[0047] Figure 3 is a flowchart of an example of a low passenger flow period elevator group management method of the present application Figure 2 ;

[0048] Figure 4 is a structural diagram of a low passenger flow period elevator group management system of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0050] Embodiment 1

[0051] Referring to FIG. 1, the present application is a low passenger flow period elevator group management method, comprising the following steps: Figure 1

[0052] S100, calculating passenger waiting time indexes of each elevator based on a hall call signal;

[0053] Specifically, in the present embodiment, the passenger waiting time is the time from the occurrence of the hall call to the arrival of the elevator at the floor of the hall call and the opening of the car door;

[0054] The calculation formula of the passenger waiting time index is:

[0055]

[0056]

[0057] wherein, t r is the passenger waiting time when the rth elevator responds to the hall call; R is the elevator set in the group; t max is the maximum value of the passenger waiting time of each elevator; T r is the passenger waiting time index of the rth elevator after normalization;

[0058] It can be explained that the passenger waiting time index is obtained by normalizing the passenger waiting time;

[0059] S200, calculating standby floor proximity indexes of each elevator;

[0060] The calculation formula of the standby floor proximity index is:

[0061] ​

[0062]

[0063]

[0064]

[0065] wherein, Z is the number of intervals, i.e. the number of standby floors; d r,j is the distance of the rth elevator relative to the standby floor of the jth interval; D r is the average distance of the rth elevator relative to the standby floors of all intervals; s r is the standby floor proximity of the rth elevator; R is the set of elevators in the group; s max is the maximum standby floor proximity of all elevators; S r is the normalized standby floor proximity index of the rth elevator;

[0066] Specifically, in the present embodiment, the standby floor proximity is calculated based on the average distance of the elevator relative to each standby floor, and the variance of the distance of the elevator relative to each standby floor, so that the standby floor proximity of the elevator close to the standby floor is always greater than the standby floor proximity of the elevator far from the standby floor;

[0067] It can be explained that the standby floor proximity index is obtained by normalizing the standby floor proximity;

[0068] S300, based on the passenger waiting time index and the standby floor proximity index, calculating the comprehensive evaluation index of each elevator;

[0069] Specifically, in the present embodiment, the comprehensive evaluation index is obtained by weighted calculation of the passenger waiting time index and the standby floor proximity index;

[0070] The calculation formula of the comprehensive evaluation index is:

[0071] E r = T r *w1+S r *w2

[0072] wherein, T r is the passenger waiting time index of the rth elevator; w1 and w2 are weight values, and the sum of the two is 1;

[0073] It can also be explained that the passenger waiting time index is given a greater weight relative to the standby floor proximity index, and in the calculation formula of the comprehensive evaluation index, w1> w2

[0074] S400, selecting the elevator with the smallest comprehensive evaluation value to serve the landing.

[0075] Example 2

[0076] Referring to Figure 2 As shown in FIG. 2, based on the example 1, the elevator group is composed of three elevators, A, B, and C, corresponding to A, B, and C car respectively. The total number of floors of the building is 8, which is divided into two separate standby intervals, interval 1 is from the 1st floor to the 3rd floor, and interval 2 is from the 4th floor to the 8th floor; the standby floor of interval 1 is the 1st floor, and the standby floor of interval 2 is the 6th floor; the floor height of each floor is assumed to be 4 meters, and the rated running speed of the elevator is assumed to be 2 meters per second; in order to simplify the calculation, the time of the elevator running a single floor distance is (4 meters) / (2 meters per second) = 2 seconds; A, B, and C cars are located at the 6th floor (standby floor 2), the 7th floor, and the 1st floor (standby floor 1) respectively; at this time, a down hall call occurs at the 5th floor.

[0077] First, according to the step one, the passenger waiting time indicators of each elevator are calculated.

[0078] The passenger waiting time of A, B, and C elevators in response to the hall call is respectively:

[0079] t A = (6-5) * 2 seconds = 2 seconds

[0080] t B = (7-5) * 2 seconds = 4 seconds

[0081] t C = (5-1) * 2 seconds = 8 seconds

[0082] The maximum value of the passenger waiting time of each elevator is:

[0083] t max = 8 seconds

[0084] The passenger waiting time indicators of A, B, and C elevators in response to the hall call are respectively:

[0085]

[0086]

[0087]

[0088] It can be known that the passenger waiting time indicators of B and A elevators in this example are not much different.

[0089] Secondly, according to the step two, the standby floor proximity indicators of A, B, and C elevators are calculated. The distances of A, B, and C elevators relative to each standby floor are respectively:

[0090] dA,1 = (6 - 1) * 4m = 20m, d A,2 = 0

[0091] d B,1 = (7 - 1) * 4m = 24m, d B,2 = (7 - 6) * 4m = 4m

[0092] d C,1 = 0, d C,2 = (6 - 1) * 4m = 20m

[0093] The average distances of the A, B and C elevators with respect to each standby floor are respectively:

[0094]

[0095]

[0096]

[0097] The standby floor proximities of the A, B and C elevators are respectively:

[0098]

[0099]

[0100]

[0101] The maximum standby floor proximities of each elevator are:

[0102] s max = 2

[0103] The standby floor proximity indexes of the A, B and C elevators are respectively:

[0104]

[0105]

[0106]

[0107] Subsequently, the comprehensive evaluation indexes of each elevator are calculated according to the step three;

[0108] Preferably, w1 = 0.6 and w2 = 0.4.

[0109] E A = T A * w1 + S A * w2 = 0.25 * 0.6 + 1 * 0.4 = 0.55

[0110] E B= T B * w1 + S B * w2 = 0.5 * 0.6 + 0.5 * 0.4 = 0.504

[0111] E C = T C * w1 + S C * w2 = 1 * 0.6 + 1 * 0.4 = 1

[0112] It can be seen that the comprehensive evaluation index of the B elevator is the smallest, which is 0.504.

[0113] Example 3

[0114] Please refer to Figure 3 shown, on the basis of example 2, the number of elevators, interval segmentation, standby floor, elevator rated speed, and the landing call generated are the same as example 2. A, B, C cars are located at the 6th floor (standby floor 2), the 8th floor, and the 1st floor (standby floor 1) respectively.

[0115] First, according to the first step, the passenger waiting time index of each elevator is calculated.

[0116] The passenger waiting time of A, B, C elevators in response to the landing call is respectively:

[0117] t A = (6-5) * 2 seconds = 2 seconds

[0118] t B = (8-5) * 2 seconds = 6 seconds

[0119] t C = (5-1) * 2 seconds = 8 seconds

[0120] The maximum value of the passenger waiting time of each elevator is:

[0121] t max = 8 seconds

[0122] The passenger waiting time index of A, B, C elevators in response to the landing call is respectively:

[0123]

[0124]

[0125]

[0126] It can be seen that the passenger waiting time index of B elevator in this embodiment is quite different from that of A elevator.

[0127] Secondly, according to the step two, the standby floor proximity indexes of A, B and C elevators are calculated. The distances of A, B and C elevators to each standby floor are respectively:

[0128] d A,1 = (6-1) * 4 meters = 20 meters, d A,2 = 0

[0129] d B,1 = (8-1) * 4 meters = 28 meters, d B,2 = (8-6) * 4 meters = 8 meters

[0130] d C,1 = 0, d C,2 = (6-1) * 4 meters = 20 meters

[0131] The average distances of A, B and C elevators to each standby floor are respectively:

[0132]

[0133]

[0134]

[0135] The standby floor proximities of A, B and C elevators are respectively:

[0136]

[0137]

[0138]

[0139] The maximum standby floor proximity of each elevator is:

[0140] s max = 2

[0141] The standby floor proximity indexes of A, B and C elevators are respectively:

[0142]

[0143]

[0144]

[0145] Subsequently, the comprehensive evaluation indexes of each elevator are calculated according to the step three.

[0146] Preferably, w1 = 0.6 and w2 = 0.4.

[0147] E A = T A*W1+S A *w2 = 0.25*0.6 + 1*0.4 = 0.55

[0148] E B = T B *w1+S B *w2 = 0.75*0.6 + 0.31*0.4 = 0.574

[0149] E C = T C *w1+S C *w2 = 1*0.6 + 1*0.4 = 1

[0150] It can be seen that the comprehensive evaluation index of the A elevator is the smallest, which is 0.55.

[0151] Finally, according to step four, the A elevator with the smallest comprehensive evaluation index is selected to serve the down hall call occurred at the 5th floor.

[0152] The results of embodiment 3 show that when the passenger waiting time index of the elevator located at the non- standby floor is much larger than the passenger waiting time index of the elevator located at the standby floor, the elevator located at the standby floor is selected as the distribution elevator through weighted calculation.

[0153] Embodiment 4

[0154] Please refer to Figure 4 , an elevator group management system in a low passenger flow period, comprising:

[0155] An acquisition module is configured to acquire a hall call signal.

[0156] A first processing module is configured to calculate a passenger waiting time index of each elevator.

[0157] A second processing module is configured to calculate a standby floor proximity index of each elevator.

[0158] A third processing module is configured to calculate a comprehensive evaluation index of each elevator based on the passenger waiting time index and the standby floor proximity index.

[0159] An execution module is configured to select an elevator with the smallest comprehensive evaluation value to serve the hall call.

[0160] Specifically, in the embodiment, the first processing module is configured to calculate the passenger waiting time index of each elevator; the second processing module is configured to calculate the standby floor proximity index of each elevator; the third processing module is configured to calculate the comprehensive evaluation index of each elevator based on the passenger waiting time index and the standby floor proximity index; and the execution module is configured to select an elevator with the smallest comprehensive evaluation value to serve the hall call.

[0161] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0162] The above describes one embodiment of the application in detail, but the content described is only the preferred embodiment of the application, and cannot be considered as limiting the scope of the implementation of the application. Any equivalent changes and improvements made within the scope of the application shall still belong to the patent coverage of the application.

Claims

1. An elevator group management method during a low passenger flow period, characterized by, The method comprises the following steps: calculating passenger waiting time indexes of each elevator based on the hall call signal; calculating standby floor proximity indexes of each elevator; the calculation formula of the standby floor proximity index is: ； wherein, is the number of intervals, i.e. the number of standby floors; is the distance of the rth elevator from the standby floor of the jth interval; is the average distance of the rth elevator from the standby floors of the intervals; is the standby floor proximity of the rth elevator; R is the set of elevators within the group; is the maximum standby floor proximity of the elevators; is the normalized standby floor proximity indicator of the rth elevator; calculating comprehensive evaluation indexes of each elevator based on the passenger waiting time index and the standby floor proximity index; selecting an elevator with the minimum comprehensive evaluation value to serve the hall call.

2. The elevator group management method during a low passenger flow period according to claim 1, characterized by, The passenger waiting time is the time from the time when the hall call occurs to the time when the elevator arrives at the floor where the hall call is generated and opens the car door. The passenger waiting time index is obtained by normalizing the passenger waiting time.

3. The elevator group management method during a low passenger flow period according to claim 2, characterized by, The calculation formula of the passenger waiting time index is: ； wherein, is the passenger waiting time when the rth elevator is assumed to respond to the hall call; R is the set of elevators within the group; is the maximum value of the passenger waiting time of each elevator; is the passenger waiting time index of the rth elevator after normalization.

4. The elevator group management method during a low passenger flow period according to claim 1, characterized by, The standby floor proximity is calculated based on the average distance of the elevator from each standby floor and the variance of the distance of the elevator from each standby floor. The standby floor proximity index is obtained by normalizing the standby floor proximity.

5. The elevator group management method during a low passenger flow period according to claim 1, characterized by, The comprehensive evaluation index is obtained by weighted calculation of the passenger waiting time index and the standby floor proximity index.

6. The elevator group management method during a low passenger flow period according to claim 5, characterized by, The calculation formula of the comprehensive evaluation index is: ； wherein is a passenger waiting time indicator for the rth elevator; , is a weight, both adding up to 1.

7. The elevator group management method during a low passenger flow period according to claim 6, characterized by, The passenger waiting time index is given a greater weight relative to the standby floor proximity index, and in the calculation formula of the comprehensive evaluation index, the following is made .

8. An elevator group management system for a low passenger traffic period, characterized by It comprises: an acquisition module for acquiring the hall call signal; a first processing module for calculating passenger waiting time indexes of each elevator; a second processing module for calculating standby floor proximity indexes of each elevator; The calculation formula of the standby floor proximity index is: ； wherein, is the number of intervals, i.e. the number of standby floors; is the distance of the rth elevator from the standby floor of the jth interval; is the average distance of the rth elevator from the standby floors of the intervals; is the standby floor proximity of the rth elevator; R is the set of elevators within the group; is the maximum standby floor proximity of the elevators; is the normalized standby floor proximity indicator of the rth elevator; a third processing module for calculating comprehensive evaluation indexes of each elevator based on the passenger waiting time index and the standby floor proximity index; an execution module for selecting an elevator with the minimum comprehensive evaluation value to serve the hall call.

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