JPH02127372A - Group management control method for elevator - Google Patents

Abstract

PURPOSE:To perform the balanced elevator control as the whole group by referring a new hall call to a nonoccurrence hall call with a high risk of long waiting, performing temporary assignment, then performing the assignment for the new hall call. CONSTITUTION:Positions of cages and calls assigned to them are shown; for the hall call, and O for the cage call. When a downward hall call 3HD at the third floor occurs newly, the expected time of arrival from the present time is calculated for each cage based on the position and call state of each cage. Suppose that 10th floor downward and ninth floor downward hall calls occur in this case, only the No.1 cage can respond to these calls within 60sec, and these calls have a high risk of long waiting if the No.1 cage is assigned to the other new call. Therefore, a nonoccurrence hall call is assumed to have occurred and temporarily assigned to the No.1 cage, and the hall call 3HD is assigned to another cage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elevator group management control method that allocates a hall call to an optimal elevator when a plurality of elevators are installed in parallel.

[Prior Art and Problems to be Solved by the Invention] In current elevators, the mainstream of group management control is assignment control using an evaluation function.

This method calculates numerically for each car each time a hall call is optimally assigned to which car it is best to assign the call to, using an evaluation function for the evaluation index of type l, and selects the car with the highest value. Or, by allocating it to a small basket, a high degree of control is possible by appropriately selecting the evaluation index and devising the evaluation function.

By the way, a typical evaluation index is the predicted waiting time for a hall call, but the prediction accuracy of this waiting time is greatly influenced by the number of halts due to hall calls that will occur in the near future and car calls derived from them. This is an increase in the number of times. In other words, it is not enough to consider the hall calls that have already occurred, and if assignments are made without taking into consideration the unoccupied hall calls that are predicted to occur in the near future, calls that have occurred subsequently will cause long waiting times. There is a possibility that this may occur.

The occurrence of this unoccurred hall call can be predicted based on, for example, the predicted value of the elevator arrival interval and the passenger occurrence rate on that floor. However, this is only a probabilistic prediction; in reality, either a call will occur or not, and the predicted waiting time will vary by about 10 seconds depending on which one.

In addition, in order to take unoccurred hall calls into consideration when predicting waiting time, it is necessary not only to predict their occurrence, but also to predict which car the call will be assigned to when it occurs. The position of each car must also be predicted.

In this way, if you try to take one unoccurred hall call into consideration, you will need multiple calculations, and if you try to predict all the unoccurred hall calls for each floor and direction, you will be forced to perform a huge amount of calculations. Moreover, as mentioned above,
(Even if the occurrence is predicted with a probability of 90% or more, it may or may not actually occur, so if this makes a difference of about 10 seconds, the waiting time will be reduced to 20%.
~ I am trying to control it in around 30 seconds, but this 1
The difference of 0 seconds is too large, and even though it requires a huge amount of calculation, we cannot expect much of an effect.

Additionally, if too much consideration is given to unoccupied hall calls, the proportion of consideration for hall calls that have already occurred will decrease accordingly, and allocation will become passive, resulting in allocation to elevators that already have many calls. As a result, there are problems such as the overall balance being impaired.

[Means to solve the problem]

The present invention has been made to solve the above problems,
Rather than taking all unoccurred hall calls into account (among unoccurred hall calls, only calls with a high risk of long waiting times if they occur are considered and allocated). It is something.

That is, when a new hall call occurs, the expected arrival time for each floor direction is calculated for each car, and then the expected arrival time is calculated for each floor/direction where no hall call has occurred and the expected arrival time is less than a predetermined value. After selecting a hall call for a floor/direction where the number of cars is one or less as an unoccurred hall call with a high risk of a long wait, and then assuming that the unoccurred hall call has occurred and tentatively assigning it. , the new hall call allocation calculation is performed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

First, a specific example of the operation when the present invention is applied to a ten-story building in which three elevators No. 1 to No. 3 are in service will be described with reference to FIGS. 4 and 5. Figure 4 shows the position of the car in each car and the calls each car has (the hall call is shown by △ and the car call is shown by Q). Car No. 1 has a service for all calls. While waiting on the 4th floor after finishing the process, Unit 2 was called to the descending hall on the 6th floor and the 1st floor.

While the car was running in the descending direction near the 7th floor with the car call on the 2nd floor, Unit 3 was running in the descending direction near the 9th floor with the 7th floor descending landing call and the car calls on the 4th and 1st floors. It's inside.

In this state, I am currently calling 3HD for the landing on the 3rd floor in the descending direction.
is newly generated, and the allocation to this new hall call 3HD will be considered.

In the present invention, when a new hall call occurs, first, the expected arrival time from the current time is calculated for each car based on the car position of each car and the call situation for each floor direction.

An example of the expected arrival time for each floor direction for Figure 4 is shown in Figure 5.
As shown in the figure, the running time per floor is 2 seconds, and the time required to stop in response to a call is calculated as 10 seconds. Note that UP indicates an upward direction, and DN indicates a downward direction.

Next, from this Figure 5, we can determine whether a long-waiting call is received for a floor/direction where the expected arrival time is below a predetermined value (60 seconds here), the number of cars is one or less, and no landing call has yet occurred. Select as a high-risk unoccupied hall call. The corresponding unoccurred hall calls are those for the 10th floor down direction and the 9th floor down direction. In other words, in the situation shown in Figure 5, there are no landing calls for the 10th floor descending direction and the 9th floor descending direction at the moment, but if they were to occur, only one machine, Unit 1, would be able to respond within 60 seconds. Yes, if another call (new call) is assigned to machine No. 1 and the situation of machine No. 1 changes, there is a high risk that the waiting time will be longer than 60 seconds.

Therefore, provisional allocation is performed for the selected 10th floor descending direction and 9th floor descending direction (indicated by 5' in Fig. 4, not assuming that a hall call has occurred). If so, the landing calls for the 10th floor down direction and the 9th floor down direction will be assigned to car No. 1. However, since this is a temporary assignment, the assignment signal is not sent to machine No. 1, and therefore machine No. 1 does not actually respond to these calls. In other words, this assignment is stored only in the group management device and is used when calculating the expected arrival time of the first car to each floor.

Next, with this provisional allocation performed, a new hall call 3HD is allocated. In this case, if the landing calls for the 10th floor descending direction and the 9th floor descending direction are made without provisional assignment, as is clear from Figure 5, the expected arrival time for the landing call 3HD is the shortest for the 1st car. However, in the present invention, since an unoccurred hall call with a risk of a long waiting time is provisionally allocated to the first car as having occurred, the expected arrival time of the first car for the hall call 3HD is different from the expected arrival time of the first car. , and the hall call 3HD is assigned to another car.

In other words, in the present invention, unoccupied hall calls towards the 10th floor and towards the 9th floor, which have a high risk of long waiting times if the status of Car 1 changes due to a new hall call, are assumed to have occurred and are provisionally allocated. By doing so and ensuring that the status of Car No. 1 does not change, it is possible to prevent long waiting times even if a landing call actually occurs on the 10th or 9th floor in the descending direction.

Next, a configuration for realizing the above operation will be explained.

FIG. 3 is a diagram showing the system configuration of a group management elevator to which the present invention is applied. In the figure, 10 is a group management control microcomputer (
A microcomputer) is provided with an input/output register 17 connected via a signal line 15 to a hall call registration device 14 equipped with a call button and an answering light.

Further, the group management control microcomputer 10 includes a communication control device 18 and is connected via a communication line 16 to elevator control devices 11 to 13 that control the operation of each of No. 1 IA to No. 3 cars.

Operating status of Units 1 to 3 (car position, direction).

Car calls, etc.) are input from the elevator control devices 11 to 13 to the group management control microcomputer 10 via the communication line 16, while hall calls are input via the signal line 15. Based on this information, the group management control microcomputer 10 determines the optimal elevator to share the new hall call, and sends an assignment signal to the elevator control device of the selected car via the communication line 16. . In the above configuration, the number of elevators is three, but of course the number is not limited to this.Next, the assignment operation of the group management control microcomputer according to the present invention will be explained with reference to the flowcharts of FIGS. 1 and 2. .

The meanings of each symbol used in FIGS. 1 and 2 are as follows.

C0UNT: Number of unoccurred hall calls with a high risk of long waiting times i: Car (car) number j: On the floor: In the driving direction (up = UP, down = DN) 28 Number of cars that can respond within a predetermined time M : Total number of floors N: Total number of cars HC (Lk): Whether there is a directional landing call on the 1st floor (yes =
1. None = 0) AR (i, j, k): Expected arrival time LF (COUNT,) for the direction to the 1st floor of Unit 1: Floor LD (COUNT, ): Direction of the same X-th unoccurred hall call LONG: Long waiting time setting value In FIGS.
t, S2). When a new hall call occurs, the operating status of each elevator at that time (car position, direction, car call, etc.)
input from each elevator control device (step S3),
Based on this, a table is created by calculating the expected arrival time from the current time for each floor direction as shown in FIG. 5 for each car (step S4). Then, using this table, select unoccupied hall calls that have a high risk of long waiting times (
The flowchart in FIG. 2 shows the details of this selection procedure in step S5).

First, initial settings are made and the process starts from the ascending direction of the first floor (step Sll, 512). Step 51: Determine whether a hall call has already occurred in the ascending direction of the first floor.
3) If it has already occurred, it is not applicable, so step 321
However, if it has not occurred, the table created in step S4 is referred to and it is determined whether the expected arrival time is within a predetermined value starting from the first aircraft.Step S14. 515
), the number of cars within a predetermined value is counted (steps 316 to 318).

If the number l is less than one, it is selected as an unoccurred hall call with a high risk of a long wait, and its floor and direction are stored (steps 319 and 320).

Steps 321 to 524) of repeating the above steps in ascending and descending directions sequentially from the second floor to the top floor, and when completed for all floors and directions, return to FIG. 1 and proceed to step S6. The number of unoccurred hall calls that have a high risk of becoming a disaster is stored as COUNT, and the respective floors and directions are LF (COUNT,) and L
It is stored in D (COUNT,).

If the number C0UNT of unoccurred hall calls is 0, provisional allocation is performed assuming that these calls (02 hall calls in the descending direction of the 10th floor and in the descending direction of the 9th floor in the example shown in FIG. 4) have occurred sequentially. (steps 86 to S8), and when the provisional allocation of the unoccurred hall calls is completed, the assignment is made for a new hall call (in the example of FIG. 4, the hall call in the descending direction of the third floor) (step S9), that is, in the present invention. When allocating new hall calls, unoccurred hall calls with a high risk of long waiting times are handled in the same manner as already allocated hall calls, and new hall calls are assigned.

〔Effect of the invention〕

According to the present invention, instead of considering all unoccurred hall calls, if no action is taken if they occur, only those with a high risk of long waiting times will be considered. It is possible to prevent long waiting times with a small amount of calculation, and to perform balanced control by compensating for potential imbalances in the group as a whole.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the procedure for allocating hall calls in the group management control method according to the present invention, FIG. 2 is a flowchart showing the procedure for selecting unoccurred hall calls according to the present invention, and FIG. 3 is a flowchart showing the procedure for selecting unoccupied hall calls according to the present invention. A system configuration diagram of the management elevator. Figure 4 is a diagram showing the relationship between car positions and calls for explaining the present invention. Figure 5 shows the expected arrival time of each car for each floor direction in the state shown in Figure 4. FIG. 10... Group management control microcomputer 11-13... Elevator control device 14... Hall call registration device 15... Signal line 16... Communication line 17... Input/output register 18... Communication control Applicant for device patent: Fujichik Co., Ltd. Graduation calculation: 4 machines 2-vj machine 3-! Machine P Translation P pA/ P N

Claims (1)

[Claims] A plurality of elevators are installed in parallel, and an evaluation value is calculated for each elevator using a predetermined evaluation formula for a common hall call, and as a result of the calculation, the hall call is assigned to the most suitable elevator. In the elevator group management control method described above, when a new hall call occurs, the expected arrival time for each floor direction is calculated for each car, and then, among the floors and directions, if a hall call has not yet occurred and the above-mentioned After selecting a hall call in a floor direction where the expected arrival time is less than a predetermined value and where the number of cars is one or less as an unoccurred hall call, and further assuming that the unoccurred hall call has occurred and temporarily assigning it, An elevator group management control method, characterized in that the new hall call assignment calculation is performed.