Elevator calling signal redistribution method

Abstract

The invention discloses an elevator call signal redistribution method, which comprises the following steps: S1, when a first elevator has an abnormality which enables the elevator not to provide a transport service for passengers, estimating a first probability that the abnormality cannot be automatically or remotely recovered within a given time by the redistribution method; and S2, according to the first probability, selecting part or all of the first calling landing signals currently allocated to the first elevator as second calling landing signals, and allocating the second calling landing signals to a second elevator different from the first elevator. According to the invention, the time waste before the calling signal of the abnormal elevator is redistributed can be reduced.

Description

Technical Field

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

[0002] During the use of elevators, various abnormal situations often cause the elevators to be temporarily unable to provide services to passengers. For example, the elevator door may be opened and closed repeatedly due to deliberate obstruction by passengers or mechanical problems such as debris in the track, door misalignment, door component failure, etc., so that the elevator door cannot start and provide transportation services to passengers. If the elevator cannot provide services to passengers for too long, the elevator call signal currently assigned to the abnormal elevator will not be responded to for a long time, which will obviously seriously affect the passengers' elevator experience and lead to complaints from passengers.

[0003] In response to this problem, Document 1 (CN202011396667.X) proposes: counting the number of elevator door reversals at the elevator car; comparing the number of elevator door reversals with the elevator door reversal threshold; when the number of elevator door reversals exceeds the elevator door reversal threshold, reallocating at least one elevator call to the elevator car to one or more second elevator cars. This document essentially decides to allocate at least one call of an abnormal elevator to other non-abnormal elevators based on the number of door reversals reaching the threshold. Although it can avoid passengers who have been allocated to abnormal elevators from waiting for an excessively long time, it has obvious disadvantages: 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 the reallocated elevator call signal needs to waste a long 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 an elevator call signal, comprising: Step S1, when an abnormality occurs in a first elevator so that the elevator cannot provide transportation service for passengers, the redistribution method estimates a first probability that the abnormality cannot be automatically or remotely restored 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.

[0006] 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 to calculate 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 to calculate 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 taking the difference obtained by subtracting the second probability from 1 as the first probability.

[0007] Preferably, the method for estimating the first probability is: when the abnormal cause of the abnormality in the first elevator is the abnormality of the elevator equipment and can be automatically recovered, the recovery duration of the elevator equipment with the abnormality automatically recovering from the abnormality to normal is estimated, and the result of the estimation is the second probability that the elevator equipment with the abnormality 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.

[0008] Preferably, the first probability is obtained by multiplying the difference obtained by subtracting the second probability from 1 by a coefficient not less than 1, 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.

[0009] 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, selecting the first elevator call signal with the longest waiting time or exceeding the preset elevator waiting time threshold; Principle 2, selecting the first elevator call signal whose redistribution has the smallest impact on the elevator experience of the second elevator passengers or does not exceed the maximum allowed elevator experience impact threshold; Principle 3, selecting the first elevator call signal with the shortest response time or not exceeding the response time threshold, wherein 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, the first elevator call signal with the shorter sum of at least two of the waiting time, response time and elevator time.

[0010] 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, and 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.

[0011] 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.

[0012] Preferably, for Principle 3, a response time threshold is determined according to the first probability, and the larger the first probability is, the larger the response time threshold is; for each first elevator call signal, the response time when the first elevator call signal is assigned to the second elevator is calculated; and the first elevator call signal whose response time does not exceed the response time threshold is used as the second elevator call signal.

[0013] Preferably, for Principle 4, a total time threshold is determined based on the first probability, and the larger the first probability is, the larger the total time threshold is; 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.

[0014] 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 where the second elevator is to stop is selected as the second elevator call signal.

[0015] 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.

[0016] Preferably, the selection range is determined according to the first 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 first probability exceeds the product of its cost and the difference obtained by subtracting the first probability from 1; the benefit refers to the net income brought 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 expenditure brought 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.

[0017] The present invention also provides an elevator call signal redistribution method, comprising: Step T1, pre-establishing the probability distribution of abnormal recovery; Step T2, when an abnormality occurs in the first elevator that makes it impossible for the first elevator to provide transportation services for passengers, according to the probability distribution of abnormality recovery, a first elevator call signal is selected from the elevator call signals currently allocated to the first elevator and is allocated to a second elevator different from the first elevator; the abnormality refers to the abnormality that makes it impossible for the elevator to provide transportation services for passengers, and the probability distribution of abnormality recovery at a given point refers to integrating the probability distribution of abnormality recovery within a period from the abnormality start time when the elevator encounters the abnormality to the given point, and the integral value obtained is the abnormality recovery probability of the first elevator recovering from the abnormality to normal.

[0018] Preferably, step T2 first calculates the abnormality recovery probability in 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.

[0019] Preferably, the selection range determined in step T2 is determined according to 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 product of its cost and the abnormal recovery probability; the benefit refers to the net income brought 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 expenditure brought 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.

[0020] Beneficial technical effects 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

[0021] This embodiment provides a method for redistributing an elevator call signal, including: Step S1, when an abnormality occurs in a first elevator so that the elevator cannot provide transportation service for passengers, the redistribution method estimates a first probability that the abnormality cannot be automatically or remotely restored 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.

[0022] 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.

[0023] It should be pointed out 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

[0024] This embodiment further illustrates the method for determining the first probability based on Embodiment 1.

[0025] The present invention does not limit the estimation method of the first probability. Several exemplary methods are given below: Method 1: Calculate the abnormality duration of the abnormality 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, 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 current abnormality of the first elevator 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.

[0026] Method 2: When the abnormal cause of the abnormality in the first elevator is the abnormality of the elevator equipment and it can be automatically recovered, the recovery duration of the elevator equipment with the abnormality automatically recovering from the abnormality to normal is estimated, and the result of the estimation is the second probability that the elevator equipment with the abnormality 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.

[0027] Method 3: The product obtained by subtracting the second probability (here the second probability comes from method 1 or method 2) from 1 and multiplying it 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 anomaly as the independent variable. Example

[0028] 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.

[0029] The step S2 selects part or all of the first elevator call signal 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 waiting time threshold; Principle 2: Select and redistribute the first elevator call signal with the smallest impact on the passenger riding experience of the second elevator or one that does not exceed the maximum allowable impact threshold on the passenger riding experience; Principle 3: Select the first elevator call signal with the shortest response time or one that does not exceed the response time threshold, where the response time refers to the time from the time when the reallocation is implemented to the time when the second elevator arrives 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.

[0030] 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.

[0031] 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 car 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.

[0032] For principle 3, a response time threshold is determined based on the first probability, and the larger the first probability is, the larger the response time threshold is. 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.

[0033] For principle 4, a total time threshold is determined based on the first probability, and the larger the first probability is, the larger the total time threshold is. 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 in 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.

[0034] Preferably, for principle 2, when the elevator experience impact value is the elevator time (for the passengers in the second elevator) or the sum of the elevator time and the waiting time (for the 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.

[0035] 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 waiting until the abnormality duration or order reaches a threshold before reallocation. Therefore, the waste of waiting time of the elevator call signal before reallocation can be greatly shortened.

[0036] In addition, when the first probability is determined by using method 3 of embodiment 3, since the coefficient is a monotonically increasing function with the time interval between the current moment and the abnormality start moment as the independent variable, the first probability obtained will gradually increase with the passage of time, and the number of second elevator call signals will also gradually increase accordingly, thereby further shortening the waste of total waiting time of elevator call signals before reallocation. Example

[0037] 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.

[0038] The step S2 first determines a selection range according to the first probability, and then uses the first elevator call signal within the selection range as the second elevator call signal.

[0039] Specifically, the selection range is determined according to the first probability so that the product of the benefit of the first elevator call signal in the selection range being selected 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 income brought 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 expenditure brought 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.

[0040] It should be pointed out that the net benefit here can be the benefit brought by any redistribution, such as the shortening of the waiting time, while the net cost can be the disadvantage brought by any redistribution, such as the extension of the waiting time. When the benefit is the shortening of the waiting time and the cost is the extension of the waiting time, the net benefit can be the shortening of the waiting time of a single second signal or the shortening of the waiting time of all second signals, or the difference between the shortening of the waiting time of a single second signal and the extension of the waiting time of the passengers of the second elevator caused by the second signal, or the difference between the total shortening of the waiting time of all second signals and the total extension of the waiting time of the passengers of 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 allocated to the second elevator but when the first elevator returns to normal and the waiting time of the passengers of the second signal when no redistribution is performed.

[0041] From the above description, it can be seen that 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 waiting 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

[0042] This embodiment provides a method for redistributing an elevator call signal, including: Step T1, pre-establishing the probability distribution of abnormal recovery; Step T2, when an abnormality occurs in the first elevator that makes it impossible for the first elevator to provide transportation services for passengers, according to the probability distribution of abnormality recovery, a first elevator call signal is selected from the elevator call signals currently assigned to the first elevator and is assigned to a second elevator different from the first elevator; the abnormality refers to an abnormality that makes the elevator unable to provide transportation services for passengers, and the probability distribution of abnormality recovery at a given point refers to the integration of the probability distribution of abnormality recovery in the period from the abnormality start time when the elevator appears the abnormality to the given point, and the integral value obtained is the probability of abnormality recovery of the first elevator from the abnormality to normal. An abnormality recovery probability distribution will correspond to a given point and is a function of the given point.

[0043] Specifically, step T2 first calculates the abnormality recovery probability in 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.

[0044] In step T2, the selection range is determined according to the abnormal recovery probability, so that the product of the benefit of the first elevator call signal in the selection range being selected as the second elevator call signal and the difference between 1 and the abnormal recovery probability exceeds the product of its cost and the abnormal recovery probability; The benefit refers to the net income brought 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 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.

[0045] Obviously, this embodiment determines and reallocates the second elevator call signal according to the abnormality recovery probability, so that the reallocation can be performed immediately after the abnormality occurs without waiting until the abnormality duration or order reaches a threshold. Therefore, the waste of waiting time of the elevator call signal before reallocation can be greatly shortened.

[0046] The present invention has been described in detail above through specific implementation modes and embodiments, 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 also make many variations and improvements, which should also be regarded as the protection scope 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 so that the elevator cannot provide transportation service for passengers, the redistribution method estimates a first probability that the abnormality cannot be automatically or remotely restored 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 to calculate 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 to calculate 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 taking the difference obtained by subtracting the second probability from 1 as 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 the abnormality of the elevator equipment and it can be automatically recovered, the recovery duration of the elevator equipment with the abnormality automatically recovering from the abnormality to normal is estimated, and the result of the estimation is the second probability that the elevator equipment with the abnormality 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, and 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: The step S2 selects part or all of the first elevator call signal 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 waiting time threshold; Principle 2: Select and redistribute the first elevator call signal with the smallest impact on the passenger riding experience of the second elevator or one that does not exceed the maximum allowable impact threshold on the passenger riding experience; Principle 3: Select the first elevator call signal with the shortest response time or one that does not exceed the response time threshold, where the response time refers to the time from the time when the reallocation is implemented to the time when the second elevator arrives 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, Determine a remaining waiting time threshold value according to the first probability, and the greater the first probability, the greater the remaining waiting time range, and 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.

7. The elevator call signal redistribution method according to claim 5, characterized in that: Regarding Principle 2, Determine a maximum allowable elevator riding experience impact threshold according to the first probability, and the greater the first probability, the greater the maximum allowable elevator riding experience impact threshold; For each first elevator call signal, the impact value of the elevator riding experience brought to the passengers of the second elevator when the first elevator call signal is assigned to the second elevator is calculated, wherein the impact value of the elevator riding experience of the passengers waiting for the second elevator refers to the extension of their waiting time plus the elevator riding time; the impact value of the elevator riding experience of the passengers in the second elevator mainly refers to the extension of their elevator riding 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.

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 larger the first probability is, a larger the response time threshold is; For each first elevator call signal, respectively, 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 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, Determine a total time threshold according to the first probability, and the greater the first probability, the greater the total time threshold; For each first elevator call signal, respectively, calculating a response time and / or an elevator ride time when the first elevator call signal is assigned to a second elevator; For each first elevator call signal, the sum of its response time and the waiting time for the elevator is calculated; The first elevator call signal whose sum of at least two items of the waiting time, the response time and the riding time in the first elevator call signal 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 floors to be stopped by the second elevator is selected as the second elevator call signal.

11. The elevator call signal redistribution method according to claim 5, characterized in that: The step S2 first determines a selection range according to the first probability, and then uses the first elevator call signal within the selection range 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 according to the first probability, so that the product of the benefit of selecting the first elevator call signal in 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 income brought 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 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.

13. A method for redistributing elevator call signals, characterized in that: include: Step T1, pre-establishing the probability distribution of abnormal recovery; Step T2, when an abnormality occurs in the first elevator that makes it impossible for the first elevator to provide transportation services for passengers, according to the probability distribution of abnormality recovery, a first elevator call signal is selected from the elevator call signals currently allocated to the first elevator and is allocated to a second elevator different from the first elevator; the abnormality refers to the abnormality that makes it impossible for the elevator to provide transportation services for passengers, and the probability distribution of abnormality recovery at a given point refers to integrating the probability distribution of abnormality recovery within a period from the abnormality start time when the elevator encounters the abnormality to the given point, and 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 in 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.

15. The elevator call signal redistribution method according to claim 14, characterized in that: In step T2, the selection range is determined according to the abnormal recovery probability, so that the product of the benefit of the first elevator call signal in the selection range being selected as the second elevator call signal and the difference between 1 and the abnormal recovery probability exceeds the product of its cost and the abnormal recovery probability; The benefit refers to the net income brought 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 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.