Elevator call signal redistribution method

Abstract

The present invention discloses a method for reallocating elevator call signals, comprising: Step S1, when a first elevator experiences an abnormality that prevents the elevator from providing passenger transportation service, estimating a first probability that the abnormality cannot be corrected automatically or remotely within a given time; Step S2, based on the first probability, selecting some or all of the first call signals currently allocated to the first elevator as second call signals, and allocating them to a second elevator different from the first. The present invention can shorten the time wasted before the abnormal elevator's call signals are reallocated.

Description

Technical Field

[0001] The present invention relates to the field of elevators, and in particular to a reallocation method for allocating a call signal of an abnormal elevator to other elevators when the elevator cannot provide transportation services for passengers due to an abnormality. Background Art

[0002] During elevator use, various abnormalities often cause elevators to temporarily stop serving passengers. For example, a passenger may intentionally block the elevator door, or mechanical issues such as debris in the tracks, door misalignment, or door component failure may cause the elevator door to repeatedly open and close, preventing it from starting and providing passenger service. If an elevator is unable to serve passengers for an extended period of time, the elevator call signal currently assigned to the abnormal elevator will remain unanswered for a long time, which will obviously seriously affect the passenger experience and lead to complaints.

[0003] To address this issue, Document 1 (CN202011396667.X) proposes: counting the number of elevator door reversals at an elevator car; comparing the number of elevator door reversals with an elevator door reversal threshold; and reallocating at least one elevator call to the elevator car to one or more second elevator cars when the number of elevator door reversals exceeds the elevator door reversal threshold. Essentially, this document determines to allocate at least one call from an abnormal elevator to other non-abnormal elevators based on when the number of door reversals reaches a threshold. While this can prevent passengers assigned to an abnormal elevator from waiting for an excessively long time, it has significant drawbacks: when the reversal threshold is small, the abnormal elevator may return to normal just after the number of reversals exceeds the reversal threshold, resulting in unnecessary call reallocation; when the reversal threshold is large, it takes a long time for the actual number of door reversals to reach the reversal threshold, and even reallocated elevator call signals will waste a significant amount of time before being reallocated.

[0004] Therefore, how to further shorten the time wasted before the elevator call signal of the abnormal elevator is reallocated becomes a technical problem to be solved. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention discloses a method for redistributing elevator call signals, comprising:

[0006] Step S1, when an abnormality occurs in a first elevator that makes it impossible for the elevator to provide transportation services for passengers, the redistribution method estimates a first probability that the abnormality cannot be restored automatically or remotely within a given time;

[0007] Step S2: selecting part or all of the first elevator call signals currently assigned to the first elevator as second elevator call signals according to the first probability, and assigning them to a second elevator different from the first elevator.

[0008] Preferably, the method for estimating the first probability is: using the abnormality start time corresponding to the same abnormality in historical data and the abnormality end time when the first elevator recovers from the abnormality to a normal state, calculating the abnormality duration of the abnormality, using the abnormality duration of each abnormality to calculate the probability distribution of the abnormality duration of the abnormality, using the probability distribution of the abnormality duration, calculating the second probability that the first elevator recovers to a normal state within a period starting from the abnormality start time of the current abnormality of the first elevator and with a length of the given time, and subtracting the difference between 1 and the second probability as the first probability.

[0009] Preferably, the method for estimating the first probability is: when the abnormal cause of the abnormality in the first elevator is an abnormality in the elevator equipment and it can be automatically recovered, the recovery duration for the abnormal elevator equipment to automatically recover from the abnormality to normal is estimated, and the result of the estimation is the second probability that the abnormal elevator equipment automatically recovers from the abnormality to normal within each recovery duration, and the difference obtained by subtracting the second probability from 1 is used as the first probability.

[0010] Preferably, the product obtained by multiplying the difference obtained by subtracting the second probability from 1 by a coefficient not less than 1 is used as the first probability, and the coefficient is a monotonically increasing function with the time interval between the current moment and the start moment of the abnormality as the independent variable.

[0011] Preferably, step S2 selects part or all of the first elevator call signals as the second elevator call signal according to any of the following principles: Principle 1, select the first elevator call signal with the longest waiting time or exceeding the preset elevator waiting time threshold; Principle 2, select the first elevator call signal whose redistribution has the smallest impact on the elevator riding experience of the second elevator passengers or does not exceed the maximum allowable elevator riding experience impact threshold; Principle 3, select the first elevator call signal with the shortest response time or does not exceed the response time threshold, and the response time refers to the time from the reallocation moment when the reallocation is implemented to the arrival of the second elevator at the departure floor of the first elevator call signal; Principle 4, select the first elevator call signal with the shorter sum of at least two of the waiting time, response time and elevator riding time.

[0012] Preferably, for principle 1, the remaining waiting time threshold is determined based on the first probability, and the larger the first probability is, the larger the range of the remaining waiting time is. The remaining waiting time is the waiting time difference obtained by subtracting the waiting time of the elevator call signal from the maximum allowed waiting time; the first elevator call signal in which the waiting time difference in the first elevator call signal is not greater than the remaining waiting time threshold is used as the second elevator call signal.

[0013] Preferably, for principle 2, the maximum allowable elevator experience impact threshold is determined based on the first probability, and the larger the first probability is, the larger the maximum allowable elevator experience impact threshold is; for each first elevator call signal, the elevator experience impact value brought to the passengers of the second elevator when the first elevator call signal is assigned to the second elevator is calculated, wherein the elevator experience impact value of the waiting passengers of the second elevator refers to their waiting time plus the extension of the elevator time; the elevator experience impact value of the passengers in the second elevator mainly refers to the extension of their elevator time; the first elevator call signal whose elevator experience impact value in the first elevator call signal does not exceed the maximum allowable elevator experience impact threshold is used as the second elevator call signal.

[0014] Preferably, for Principle 3, a response time threshold is determined based on the first probability, and the greater the first probability, the greater the response time threshold. For each first elevator call signal, the response time when the first elevator call signal is assigned to the second elevator is calculated. The first elevator call signal whose response time does not exceed the response time threshold is used as the second elevator call signal.

[0015] Preferably, for principle 4, a total time threshold is determined based on the first probability, and the greater the first probability, the greater the total time threshold; for each first elevator call signal, the response time and / or elevator riding time when the first elevator call signal is assigned to the second elevator are calculated; for each first elevator call signal, the sum of its response time and the waiting time already waited is calculated; the first elevator call signal for which the sum of at least two of the waiting time, response time and elevator riding time in the first elevator call signal does not exceed the response time threshold is used as the second elevator call signal.

[0016] Preferably, for principle 2, when the elevator experience impact value is the elevator time or the sum of the elevator time and the waiting time, the first elevator call signal whose departure floor and / or destination floor are both the floors to be stopped by the second elevator is selected as the second elevator call signal.

[0017] Preferably, in step S2, a selection range is first determined according to the first probability, and then the first elevator call signal within the selection range is used as the second elevator call signal.

[0018] Preferably, the selection range is determined based on the first probability so that the product of the benefit of selecting the first elevator call signal within the selection range as the second elevator call signal and the first probability exceeds the product of the cost thereof and the difference between 1 and the first probability. The benefit refers to the net income brought about by the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is not restored within the given time. The cost refers to the net cost brought about by the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is restored within the given time.

[0019] The present invention also provides an elevator call signal redistribution method, comprising:

[0020] Step T1, pre-establish the probability distribution of abnormal recovery;

[0021] In step T2, when an abnormality occurs in the first elevator that prevents the first elevator from providing passenger transportation service, a first elevator call signal is selected from the elevator call signals currently assigned to the first elevator and assigned to a second elevator different from the first elevator based on a probability distribution of abnormality recovery. The abnormality is an abnormality that prevents the elevator from providing passenger transportation service. The abnormality recovery probability distribution at a given point is the integration of the abnormality recovery probability distribution over a period from the time the abnormality occurs to the given point. The integral value obtained is the abnormality recovery probability of the first elevator recovering from the abnormality to normal.

[0022] Preferably, step T2 first calculates the abnormality recovery probability within the time period from the abnormality start time to the current time according to the probability distribution, then determines a selection range according to the abnormality recovery probability, and finally uses the first elevator call signal within the selection range as the second elevator call signal.

[0023] Preferably, in step T2, the selection range is determined based on the abnormal recovery probability, so that the product of the benefit of the first elevator call signal within the selection range being selected as the second elevator call signal and the difference obtained by subtracting the abnormal recovery probability from 1 exceeds the cost thereof and the product of the abnormal recovery probability. The benefit refers to the net income brought about by the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is not restored within a given time. The cost refers to the net cost brought about by the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is restored within the given time.

[0024] Beneficial technical effects

[0025] The elevator call signal redistribution method of the present invention can shorten the time wasted before the call signal of an abnormal elevator is redistributed. DETAILED DESCRIPTION Example

[0026] This embodiment provides a method for redistributing elevator call signals, including:

[0027] Step S1, when an abnormality occurs in a first elevator that makes it impossible for the elevator to provide transportation services for passengers, the redistribution method estimates a first probability that the abnormality cannot be restored automatically or remotely within a given time;

[0028] Step S2: selecting part or all of the first elevator call signals currently assigned to the first elevator as second elevator call signals according to the first probability, and assigning them to a second elevator different from the first elevator.

[0029] When the first probability is greater than a probability threshold, step S2 is performed again; the probability threshold is a real number greater than 0.

[0030] It should be noted that the elevator abnormality in this embodiment is exemplified as an abnormality that does not require on-site processing by maintenance personnel or other professionals in a relatively short period of time, or can be self-repaired with only remote participation. Example

[0031] This embodiment further illustrates the method for determining the first probability based on the embodiment 1.

[0032] The present invention does not limit the method for estimating the first probability. Several exemplary methods are given below:

[0033] Method 1: Calculate the abnormality duration of the abnormality using the abnormality start time corresponding to the same abnormality and the abnormality end time when the first elevator recovers from the abnormality to a normal state in historical data, calculate the probability distribution of the abnormality duration of the abnormality using the abnormality duration of each abnormality, calculate the second probability that the first elevator recovers to a normal state within a period starting from the abnormality start time of the first elevator's current abnormality and having a length of the given time using the probability distribution of the abnormality duration, and use the difference obtained by subtracting the second probability from 1 as the first probability.

[0034] Method 2: When the abnormality of the first elevator is caused by an abnormality of the elevator equipment and is capable of automatic recovery, the recovery duration of the abnormal elevator equipment automatically recovering from the abnormality to normal is estimated. The result of the estimation is a second probability that the abnormal elevator equipment automatically recovers from the abnormality to normal within each recovery duration, and the difference obtained by subtracting the second probability from 1 is used as the first probability.

[0035] Method 3: Subtract the second probability from 1 (here, the second probability comes from Method 1 or Method 2) and multiply the difference by a coefficient not less than 1 to obtain the first probability. The coefficient is a monotonically increasing function with the time interval between the current moment and the start of the anomaly as the independent variable. Example

[0036] Based on any of the above embodiments, this embodiment further illustrates how to select part or all of the first elevator call signal as the second elevator call signal.

[0037] In step S2, part or all of the first elevator call signal is selected as the second elevator call signal according to any of the following principles:

[0038] Principle 1: Select the first elevator call signal with the longest waiting time or one that exceeds the preset waiting time threshold;

[0039] Principle 2: Select and redistribute the first elevator call signal that has the smallest impact on the passenger experience of the second elevator or does not exceed the maximum allowable elevator experience impact threshold;

[0040] Principle 3: Select the first elevator call signal with the shortest response time or one that does not exceed the response time threshold. The response time is the time from the moment the reallocation is implemented to the second elevator arriving at the departure floor of the first elevator call signal.

[0041] Principle 4: The first elevator call signal has the shorter sum of at least two of the waiting time, response time and elevator riding time.

[0042] For principle 1, the remaining waiting time threshold is determined based on the first probability, and the larger the first probability is, the larger the remaining waiting time range is. The remaining waiting time is the waiting time difference obtained by subtracting the waiting time of the elevator call signal from the maximum allowed waiting time; the first elevator call signal whose waiting time difference in the first elevator call signal is not greater than the remaining waiting time threshold is used as the second elevator call signal.

[0043] For principle 2, the maximum allowable elevator experience impact threshold is determined based on the first probability, and the larger the first probability is, the larger the maximum allowable elevator experience impact threshold is; for each first elevator call signal, the elevator experience impact value brought to the passengers of the second elevator when the first elevator call signal is assigned to the second elevator is calculated, wherein the elevator experience impact value of the waiting passengers of the second elevator refers to their waiting time plus the extension of the elevator time; the elevator experience impact value of the passengers in the second elevator mainly refers to the extension of their elevator time; the first elevator call signal whose elevator experience impact value does not exceed the maximum allowable elevator experience impact threshold in the first elevator call signal is used as the second elevator call signal.

[0044] For Principle 3, a response time threshold is determined based on the first probability, and the larger the first probability, the larger the response time threshold. For each first elevator call signal, the response time when the first elevator call signal is assigned to the second elevator is calculated. The first elevator call signal whose response time does not exceed the response time threshold is used as the second elevator call signal.

[0045] For principle 4, a total time threshold is determined based on the first probability, and the greater the first probability, the greater the total time threshold; for each first elevator call signal, the response time and / or elevator riding time when the first elevator call signal is assigned to the second elevator are calculated; for each first elevator call signal, the sum of its response time and the waiting time is calculated; the first elevator call signal for which the sum of at least two of the waiting time, response time and elevator riding time in the first elevator call signal does not exceed the response time threshold is used as the second elevator call signal.

[0046] Preferably, for principle 2, when the elevator experience impact value is the elevator time (for passengers in the second elevator) or the sum of the elevator time and the waiting time (for passengers waiting for the second elevator), the first elevator call signal whose departure floor and / or destination floor are both the floors to be stopped by the second elevator is selected as the second elevator call signal.

[0047] As can be seen from the above description, this embodiment determines and reallocates the second elevator call signal based on the first probability, so that the reallocation can be performed immediately after the abnormality occurs, without having to wait until the duration or order of the abnormality reaches a threshold. Therefore, the wasted waiting time of the elevator call signal before reallocation can be greatly shortened.

[0048] Furthermore, when the first probability is determined using method 3 of embodiment 3, since the coefficient is a monotonically increasing function with the time interval between the current moment and the start of the abnormality as the independent variable, the obtained first probability will gradually increase over time, and accordingly, the number of second elevator call signals will also gradually increase, thereby further shortening the total waiting time before the elevator call signal is reallocated. Example

[0049] This embodiment further illustrates how to select part or all of the first elevator call signal as the second elevator call signal based on the above-mentioned embodiment 1 or embodiment 2.

[0050] In step S2, a selection range is first determined according to the first probability, and then the first elevator call signal within the selection range is used as the second elevator call signal.

[0051] Specifically, the selection range is determined based on the first probability so that the product of the benefit of selecting the first elevator call signal within the selection range as the second elevator call signal and the first probability exceeds the product of the cost thereof and the difference obtained by subtracting the first probability from 1.

[0052] The benefit refers to the net gain resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is not restored within the given time; the cost refers to the net expense resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is restored within the given time.

[0053] It should be noted that the net benefit here can be the benefits of any redistribution, such as a shortened waiting time, while the net cost can be the disadvantages of any redistribution, such as an extended waiting time. When the benefit is a shortened waiting time and the cost is an extended waiting time, the net benefit can be the shortened waiting time of a single second signal or the shortened waiting time of all second signals, or the difference between the shortened waiting time of a single second signal and the extended waiting time of passengers in the second elevator caused by that second signal, or the difference between the total shortened waiting time of all second signals and the total extended waiting time of passengers in the second elevator caused by all second signals. The net cost can be the difference between the waiting time of a single or all second signals after being assigned to the second elevator but when the first elevator returns to normal operation and the waiting time of passengers with the second signal if no redistribution is performed.

[0054] As can be seen from the above description, the present application determines and reallocates the second elevator call signal based on the first probability, so that the reallocation can be carried out immediately after the abnormality occurs without having to wait until the duration or order of the abnormality reaches a threshold before reallocation. Therefore, the waste of waiting time of the elevator call signal before reallocation can be greatly shortened. Example

[0055] This embodiment provides a method for redistributing elevator call signals, including:

[0056] Step T1, pre-establish the probability distribution of abnormal recovery;

[0057] In step T2, when an abnormality occurs in the first elevator that prevents it from providing passenger transport service, a first elevator call signal is selected from the call signals currently assigned to the first elevator and assigned to a second elevator different from the first elevator based on a probability distribution for abnormality recovery. The abnormality is the abnormality that prevents the elevator from providing passenger transport service. The abnormality recovery probability distribution at a given point is the integral of the abnormality recovery probability distribution over the period from the time the abnormality occurs to the given point. The integral value is the abnormality recovery probability of the first elevator returning to normal operation from the abnormality. An abnormality recovery probability distribution corresponds to a given point and is a function of the given point.

[0058] Specifically, step T2 first calculates the abnormality recovery probability within the time period from the abnormality start time to the current time according to the probability distribution, then determines a selection range according to the abnormality recovery probability, and finally uses the first elevator call signal within the selection range as the second elevator call signal.

[0059] In step T2, the selection range is determined based on the abnormality recovery probability, so that the product of the benefit of selecting the first elevator call signal within the selection range as the second elevator call signal and the difference between 1 and the abnormality recovery probability exceeds the product of the cost thereof and the abnormality recovery probability.

[0060] The benefit refers to the net gain resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is not restored within the given time; the cost refers to the net expense resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is restored within the given time.

[0061] Obviously, this embodiment determines and reallocates the second elevator call signal based on the abnormality recovery probability, so that the reallocation can be performed immediately after the abnormality occurs, without having to wait until the abnormality duration or order reaches a threshold. Therefore, the wasted waiting time of the elevator call signal before reallocation can be greatly shortened.

[0062] The present invention has been described in detail above by way of specific embodiments and examples, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may make many variations and improvements, which should also be considered within the scope of protection of the present invention.

Claims

1. A method for redistributing elevator call signals, characterized in that: include: Step S1, when an abnormality occurs in a first elevator that makes it impossible for the elevator to provide transportation services for passengers, the redistribution method estimates a first probability that the abnormality cannot be restored automatically or remotely within a given time; Step S2: selecting part or all of the first elevator call signals currently assigned to the first elevator as second elevator call signals according to the first probability, and assigning them to a second elevator different from the first elevator.

2. The elevator call signal redistribution method according to claim 1, characterized in that: The method for estimating the first probability is: using the abnormality start time corresponding to the same abnormality in historical data and the abnormality end time when the first elevator recovers from the abnormality to a normal state, calculating the abnormality duration of the abnormality, using the abnormality duration of each abnormality, calculating the probability distribution of the abnormality duration of the abnormality, using the probability distribution of the abnormality duration, calculating the second probability that the first elevator recovers to a normal state within a period starting from the abnormality start time of the current abnormality of the first elevator and having a length of the given time, and subtracting the second probability from 1 as the difference between the first probability and the abnormality duration, and the first probability.

3. The elevator call signal redistribution method according to claim 1, characterized in that: The method for estimating the first probability is: when the abnormal cause of the abnormality in the first elevator is an abnormality in the elevator equipment and is capable of automatic recovery, the recovery duration of the abnormal elevator equipment automatically recovering from the abnormality to normal is estimated, and the result of the estimation is a second probability that the abnormal elevator equipment automatically recovers from the abnormality to normal within each recovery duration, and the difference obtained by subtracting the second probability from 1 is used as the first probability.

4. The elevator call signal redistribution method according to claim 2 or 3, characterized in that: The product obtained by multiplying the difference obtained by subtracting the second probability from 1 by a coefficient not less than 1 is used as the first probability, where the coefficient is a monotonically increasing function with the time interval between the current moment and the abnormality start moment as the independent variable.

5. The elevator call signal redistribution method according to claim 1, characterized in that: In step S2, part or all of the first elevator call signal is selected as the second elevator call signal according to any of the following principles: Principle 1: Select the first elevator call signal with the longest waiting time or one that exceeds the preset waiting time threshold; Principle 2: Select and redistribute the first elevator call signal that has the smallest impact on the passenger experience of the second elevator or does not exceed the maximum allowable elevator experience impact threshold; Principle 3: Select the first elevator call signal with the shortest response time or one that does not exceed the response time threshold. The response time is the time from the moment the reallocation is implemented to the second elevator arriving at the departure floor of the first elevator call signal. Principle 4: The first elevator call signal has the shorter sum of at least two of the waiting time, response time and elevator riding time.

6. The elevator call signal redistribution method according to claim 5, characterized in that: Regarding principle 1, Determining a remaining waiting time threshold based on the first probability, wherein a larger the first probability, a larger the remaining waiting time range, the remaining waiting time being a difference between the maximum allowable waiting time and the actual waiting time of the elevator call signal; The first elevator call signal whose waiting time difference in the first elevator call signal is not greater than the remaining waiting time threshold is used as the second elevator call signal.

7. The elevator call signal redistribution method according to claim 5, characterized in that: Regarding principle 2, Determining a maximum allowable elevator riding experience impact threshold according to the first probability, wherein a greater the first probability, a greater the maximum allowable elevator riding experience impact threshold; For each first elevator call signal, calculate the impact on the ride experience of the passengers in the second elevator when the first elevator call signal is assigned to the second elevator. The impact on the ride experience of the passengers waiting for the second elevator is the sum of their waiting time and the extended ride time. The impact on the ride experience of the passengers in the second elevator is mainly the extended ride time. The first elevator call signal whose elevator riding experience impact value does not exceed the maximum allowable elevator riding experience impact threshold in the first elevator call signal is used as the second elevator call signal.

8. The elevator call signal redistribution method according to claim 5, characterized in that: Regarding principle 3, determining a response time threshold according to the first probability, wherein a greater the first probability is, a greater the response time threshold is; For each first elevator call signal, calculating a response time when the first elevator call signal is assigned to the second elevator; The first elevator call signal whose response time does not exceed the response time threshold among the first elevator call signals is used as the second elevator call signal.

9. The elevator call signal redistribution method according to claim 5, characterized in that: Regarding Principle 4, determining a total time threshold according to the first probability, wherein the greater the first probability, the greater the total time threshold; For each first elevator call signal, calculating a response time and / or a ride time when the first elevator call signal is assigned to a second elevator; For each first elevator call signal, calculate the sum of its response time and the waiting time; The first elevator call signal whose sum of at least two items of the waiting time, the response time, and the riding time does not exceed the response time threshold is used as the second elevator call signal.

10. The elevator call signal redistribution method according to claim 5, characterized in that: For principle 2, when the elevator experience impact value is the elevator time or the sum of the elevator time and the waiting time, the first elevator call signal whose departure floor and / or destination floor are both the second elevator's waiting floors is selected as the second elevator call signal.

11. The elevator call signal redistribution method according to claim 5, characterized in that: In step S2, a selection range is first determined according to the first probability, and then the first elevator call signal within the selection range is used as the second elevator call signal.

12. The elevator call signal redistribution method according to claim 11, characterized in that: The selection range is determined based on the first probability, so that the product of the benefit of selecting the first elevator call signal within the selection range as the second elevator call signal and the first probability exceeds the product of the cost thereof and the difference obtained by subtracting the first probability from 1; The benefit refers to the net gain resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is not restored within the given time; the cost refers to the net expense resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is restored within the given time.

13. A method for redistributing elevator call signals, characterized in that: include: Step T1, pre-establish the probability distribution of abnormal recovery; In step T2, when an abnormality occurs in the first elevator that prevents the first elevator from providing passenger transportation service, a first elevator call signal is selected from the elevator call signals currently assigned to the first elevator and assigned to a second elevator different from the first elevator based on a probability distribution of abnormality recovery. The abnormality is an abnormality that prevents the elevator from providing passenger transportation service. The abnormality recovery probability distribution at a given point is the integration of the abnormality recovery probability distribution over a period from the time the abnormality occurs to the given point. The integral value obtained is the abnormality recovery probability of the first elevator recovering from the abnormality to normal.

14. The elevator call signal redistribution method according to claim 13, characterized in that: The step T2 first calculates the abnormality recovery probability within the period from the abnormality start time to the current time according to the probability distribution, then determines a selection range according to the abnormality recovery probability, and finally uses the first elevator call signal within the selection range as the second elevator call signal.

15. The elevator call signal redistribution method according to claim 14, characterized in that: In step T2, the selection range is determined based on the abnormality recovery probability, so that the product of the benefit of selecting the first elevator call signal within the selection range as the second elevator call signal and the difference between 1 and the abnormality recovery probability exceeds the product of the cost thereof and the abnormality recovery probability. The benefit refers to the net gain resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is not restored within the given time; the cost refers to the net expense resulting from the first elevator call signal within the selection range being selected as the second elevator call signal when the first elevator is restored within the given time.