JPH03288776A - Group management device for elevator - Google Patents

Abstract

PURPOSE:To prevent the dumpling drive by calculating the max. average arrival time interval of each cage which arrives a standard floor subsequently to a called-back candidature cage and immediately outputting a standard floor calling-back instruction to a called-back candidature cage when the time is larger than the max. average arrival interval. CONSTITUTION:In a group management device 10, if the up-peak time is detected by a means 10C from the calling generation situation and the number of waiting users on a standard floor, and cage which completes service is selected as a candidature cage for the calling back to the standard floor by a means 10D. Then, the arrival interval of the cage at an expected arrival time in the case where the candidature cage is called back to the standard floor is calculated by a means 10E, and the max. average arrival interval among the average arrival interval at each arrival time point of each cage which arrives afterwards is calculated by a means 10F. A means 10G compares the both time, and when the former is larger, the candidature cage is immediately called back to the standard floor, while if the latter is larger, the cage is put into waiting, and at the time point when the former becomes larger than the latter, the candidature cage is called back to the standard floor. Accordingly, the arrival interval of each cage to the standard floor can be set nearly uniform.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement of a group control device for elevators, and is particularly effective during up-peak hours such as the morning dispatch time of office buildings. .

[Conventional technology]

During peak amplifier times such as when dispatched in the morning, the standard floor (entrance floor)
Therefore, if normal allocation control is performed, there will be a backlog of cars on the standard floor, but on the upper floors, there will be a large number of unloaded cars that are out of service and left unloaded for all calls. This creates a situation where passengers are playing around, and the waiting time for passengers on the standard floor becomes significantly worse.

For this reason, a conventional method has been adopted in which, for example, at a predetermined time, the operation pattern is switched to the peak amplifier operation pattern, and the cars that have responded to all calls and finished their service are forcibly called back to the standard floor.

[Problem to be solved by the invention]

However, if a car that has been serviced for all calls is simply called back to the standard floor, the car will be left in a pile as shown in FIG. FIG. 7 is an example of the operation diagram of each car when four cars are in service in a building with 10 floors. As shown in Figure 7, if the cars that have finished their service are simply called back to the standard floor, cars will arrive one after another and passengers will board, and after those cars have departed, it will be difficult for the next car to arrive. This creates a situation where there is no such thing. In this situation, there will be cars with many passengers and cars with few passengers, and the disparity in the arrival interval of the cars will also increase, which will improve the waiting time for passengers during up-peak hours as a whole. I don't see much effect. In the example in Figure 7,
Passengers who arrive at the hall just after car No. 4 departs will be left waiting for quite a long time, which can be frustrating.

This method of immediately recalling a car that has finished its service to the standard floor seems to be an efficient method; however,
It wasn't necessarily the best way.

In addition, with the method of predetermining the amplifier peak time period and switching the driving pattern when the time period arrives, if the dispatch time period happens to change for some reason, it will be wasted even though there are not many passengers on the standard floor. The cars will have to be recalled, and as a result, the service on other floors will deteriorate.

[Means to solve the problem]

This invention was made to solve the above-mentioned problems, and its features include a means to detect up-peak from the traffic demand situation, and a means to respond to all car calls and hall calls and terminate the service. means for selecting a car as a recall candidate car; means for calculating an arrival interval of the car after a predetermined time point at an expected arrival time when the recall candidate car is called back to a reference floor; means for calculating a maximum average arrival interval among each average arrival interval after a predetermined time point at each expected arrival time of each car that arrives at the reference floor later than the standard floor; and when the arrival interval is larger than the maximum average arrival interval, Immediately output a reference floor callback command to the callback candidate car, and when the arrival interval is smaller than the maximum average arrival interval, when the arrival interval becomes equal to or larger than the maximum average arrival interval, and means for outputting a reference floor recall command to the recall candidate car.

[Effect]

In such a configuration, when it is detected that the peak time has arrived based on the number of calls and the number of customers waiting on the standard floor, the own car first responds to all the car calls and hall calls it has and provides service. The completed car is selected as a candidate car for recall to the standard floor. Next, if this recall candidate car is now called back to the standard floor, the arrival interval of the car at the expected arrival time (after the most recent time when the car arrived at the standard floor in the past) is calculated, and this recall candidate car is The maximum average interarrival interval among the average interarrival intervals at the time of arrival of each car arriving after the car is calculated. Then, compare the arrival interval of the car when this recall candidate car is recalled with the maximum average arrival interval, and if the former is larger, immediately recall the recall candidate car to the standard floor, and the latter If is large, the recall candidate car is left on standby, and when the former is equal to or larger than the latter, the recall candidate car is called back to the standard floor. By repeating the above procedure in this way, the intervals at which each car arrives at the reference floor can be made approximately equal.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. For convenience, the number of elevators for Units 1 to 4 is 10.
Although the case where the elevator is in service in a building with multiple floors will be described, it goes without saying that the present invention can be applied regardless of the number of elevators or the number of floors.

FIG. 1 is an overall configuration diagram of the present invention, showing a group management device 10 and an operation control device 1 for No.
1 to 14 (partially not shown). In Fig. 1, IOA is a hall call registration means for registering hall calls for each floor, and IOB is a means for registering multiple cars in response to newly generated hall calls. The IOC is an allocation means for selecting and allocating the most suitable car from among the cars, and an IOC is a means for detecting an up-peak from changes in the occurrence of calls or waiting customers on the standard floor, the load status of the car at the time of departure from the standard floor, etc. , 10D
(10) call-back candidate car selection means for selecting a car that has completed service for all car calls and hall calls and is in a standby state as a call-back candidate car;
E is a means for calculating the arrival interval of the car after a predetermined time (for example, the most recent time in the past when the car arrived at the reference floor) at the expected arrival time when the recall candidate car is called back to the reference floor; At each expected arrival time of each car that arrives at the reference floor after the recall candidate car,
Means for calculating the maximum average arrival interval among each average arrival interval after a predetermined time point, LOG compares the arrival interval and the maximum average arrival interval, and if the former is larger, immediately outputs a reference floor recall command. However, when the latter is larger, the reference floor recall command output means outputs a reference floor recall command when the former becomes equal to or larger than the latter.

11A is an assigned hall call registration means for registering the hall call assigned to car No. 1, IIB is a car call registration means for registering a car call, and IIC is for controlling the lighting of the hall lanterns installed at the landings on each floor. Notification device control means, 1
1D is an operation control means that controls basic operations such as running, stopping, and driving direction of the car according to the car position in order to respond to a car call, an assigned hall call, or a call-back command. Each of the door control means in the operation control device 11 that controls opening and closing is well known. In addition, the operation control device 12 for Units 2 to 4
14 (not shown) is also configured in the same manner as for the No. 1 machine.

FIG. 2 is a block circuit diagram of the group management device 10. The group management device 10 is composed of a microcomputer, and has a CPU 21.
．． R,0M22. RAM23. It includes an input circuit 24 and an output circuit 25. The input circuit 24 receives hall call signals 26 from hall call buttons (not shown) on each floor, and status signals for each car (car position, driving direction, presence or absence of car calls, etc.) from the operation control devices 11 to 14. input and output circuit 25
A response signal 27 to the hall call registration light built into each hall call button, an assignment signal to the operation control devices 11 to 14, a callback command signal to the reference floor, etc. are outputted from the terminal.

With the above configuration, the present invention will now be described in detail.

FIG. 3 is a flowchart illustrating a part of the main program for group management control that describes a process related to callback to the standard floor according to the present invention.

First, in step M1, it is determined whether or not there is an up peak.

This can be done, for example, by detecting the number of hall calls that occur on the standard floor at each predetermined time, or by installing a waiting passenger number detection device at the standard floor landing, or by checking the number of waiting passengers, or by checking the number of waiting passengers. This can be easily determined from the load situation inside the car at the time of departure from the floor. As a result, if it is not the up-peak period, the process proceeds to return and normal group management operation is performed. In the case of amplifier peak, the receiver of the own car has finished serving all calls and selects the car that is on standby as a callback candidate car, and determines whether there is a callback candidate car (steps M2 and M3). . If all cars are in service operation for a call and there is no callback car, the process goes to return again and normal group management control is performed, but if there is a callback candidate car, the process goes to step 4. move on. In step M4, it is determined whether or not there will be unloaded passengers even if the recall candidate car is called back to the reference floor as soon as possible, and if it is likely that unloaded passengers will occur, a recall command is issued to the recall candidate car. and immediately recalls the recall candidate car to the standard floor (step M7). In this way, if there are likely to be unloaded passengers on the standard floor, even if the candidate car is called back to the standard floor now, it is still possible to have the car depart from the standard floor when it is almost full. Immediately give a recall command and call back to the standard floor. Note that the detection of whether there is likely to be a backlog of passengers may be done by directly detecting the number of waiting passengers at the landing, or by estimating it using the elapsed time since the landing call was registered. It's okay.

If it is not likely that there will be a backlog of passengers on the standard floor, the process proceeds from step M4 to step M5, and sit and maxi are calculated. Here, sit represents the arrival interval of the car after a predetermined time at the expected arrival time when the recall candidate car is called back to the reference floor at the present time, and maxt is the arrival interval at the reference floor after the recall candidate car is called back to the reference floor. This refers to the maximum average arrival interval among the average arrival intervals after a predetermined time point at each expected arrival time of each car arriving at , and these will be explained using FIG.

Figure 6 is a diagram showing an example of the operation line of each car. At present, car No. 4 has already arrived at the standard floor, while car No. 1 has been selected as a recall candidate car, and after that car No. 2 has arrived at the standard floor. It is assumed that Units 1 and 3 arrive at the standard floor. In FIG. 6, wt. is the above-mentioned predetermined time point, and here, if we consider the time when the car arrived at the reference floor most recently in the past with the present time as a reference, the predetermined time point wt is the time when the No. 4 car arrived in this example. becomes. wt indicates the expected time of arrival at the standard floor when the recall candidate car, that is, car No. 1, is called back at the present time, and WLz to wt4 indicate the expected arrival times to the standard floor of cars No. 2 to No. 4, respectively. There is.

Therefore, in the example of FIG. 6, the above-mentioned sit is 1FJi
A predetermined time point old in the expected arrival time old when the return candidate car (car No. 1) is called back to the reference floor. The arrival interval of subsequent cars is: 5it = wt, - prisoner t.

It is expressed as

In the example of FIG. 6, time -t. There are no other cars that arrive between and time t, but if there are n cars that are already traveling towards the reference floor at the moment and arrive at the reference floor before time wt, then The above sit is 11 2 wt, - prisoner t.

s+t= n(-1 becomes.

- On the other hand, in order to calculate the above-mentioned maxt, first calculate the average arrival interval after a predetermined time at each expected arrival time of each car that arrives at the reference floor after the recall candidate car.

For example, a predetermined time w at the expected arrival time point 2 of Unit 2
t. The average arrival interval of subsequent cars is Wjz wt.

It is expressed as

Similarly, the predetermined times at the expected arrival time 11t3 of the No. 3 car and the expected arrival time wt of the No. 4 car.

The average arrival interval of each subsequent car is wL+
wto wLa wt.

It is expressed as 4. Then, among these average arrival intervals, the maximum value is set as maXL.

Note that the expected arrival time of each car at the standard floor can be easily calculated by assuming that each car returns to the standard floor immediately after responding to all the hall calls and car calls it has in sequence. Furthermore, the calculation may include calls that are expected to occur through learning.

In addition, in the example shown in Fig. 6, when calculating maxt, the average arrival interval at the expected arrival time of all cars except for recall candidate cars is calculated, but it is not necessary to calculate it for all cars. For example, if it is difficult to predict the expected arrival time -t4 of the No. 4 car at this point in time, maxt may be calculated from the average arrival interval at each time point wt2 and -13.

Returning to FIG. 3, in step M6, sit and ma obtained above are
Compare x t and if sit is already larger,
Since the arrival interval of the car at the time of arrival of the recall candidate car is already larger than the average arrival interval of cars arriving after that, the process advances to step M7, where a recall command is immediately given to the recall candidate car, and the call is made to the standard floor. return. If sit is smaller, proceed to return, and repeat steps M1-M6 while the callback candidate car is on standby. When sit is equal to maxt, proceed to step M7 and give a callback command to the callback candidate car. .

In this way, when sit becomes equal to maxt, a recall command is given, for example, when ma is set to t in the state shown in FIG.
Assuming that is the average arrival interval of the car at time wt3, then time wt. The average arrival interval of the J-hibete car is larger than other periods during ~time point wt3, so sit is made to match the average arrival interval at this time, and after that, car No. 2 is selected as a recall candidate car. If the same procedure is repeated when the average car arrival interval is large, the car arrival interval will become uniform, and as a result, the car arrival interval will become extremely large. This can be avoided, and the arrival intervals of cars will be made more uniform overall.

Note that δ in step M6 is an adjustment parameter,
It can be set to an appropriate value according to the site specifications, model, etc.

For example, if δ is given a value of 10 within a predetermined range, the car will return to the standard floor as soon as possible (L), which will reduce the number of idle cars, freeze waiting time, and reduce customer dissatisfaction. This will work towards eliminating the problem. Furthermore, if a negative value is given as δ within a predetermined range, the car will return to the standard floor that much later (M), which will work in the direction of reliably preventing dumpling operation.

Next, the procedure for calculating sit and maxt will be explained with reference to FIGS. 4 and 5.

FIG. 4 is a flowchart 1- showing the procedure for calculating the above sit. In Figure 4, j is the car number, N
is the total number of cars subject to group management control, nk is the number of cars that arrive at the reference floor before the recall candidate car after the predetermined time wto, n is the car number of the recall candidate car, wt(j
) and w t fn) are the expected arrival times of the j-th or n-th car at the reference floor, respectively.

First, in step Mll, set j and nk to their initial values, and then in step M
At step 12, it is confirmed whether the check for all machines has been completed. In step M13, for each car other than the recall candidate car 5, it is checked in order from car No. 1 whether or not it arrives at the standard floor earlier than the IIJ return candidate car, and if it arrives earlier, 1 is added to nk ( Step M14). Check the above procedure for all machines (Step M15)
．． M12) When L is completed, the process advances to step M16, and a predetermined time wt is determined at the expected arrival time of the callback candidate car. The arrival interval of subsequent cars is determined.

FIG. 5 is a flowchart showing the procedure for calculating the above maxt.

In Figure 5, j is the car number and k is the predetermined time w.
The number of cars that arrive at the standard floor before car i after to (
(including simultaneous arrivals), wt (11 is the expected arrival time of the i-th car at the standard floor, and other symbols that are the same as in FIG. 4 indicate the same things as in FIG. 4.

First, in step M21, l and maxt are set to initial values, and in step M22, it is confirmed whether or not the check for all monthly machines has been completed. In step M23, it is checked whether the expected arrival time of car number i or the expected arrival time of the recall candidate car is later (including simultaneously). If it is later, j and k are set to initial values in step M24, and then In steps M256 to M29, the average interarrival interval of the cars during the time point wto = wt(1) is determined. In other words, by repeating steps M25 to M28, when all cars are checked for cars that arrive at the reference floor before car number i, the number of cars is determined.
In step M29, time wt. −wt(il) and compare it with max t, if max
If it is larger than t, that value is held as maxt (step M30). Next, add 1 to i (step M31), repeat the same procedure, and if there is a car that arrives later than the recall candidate car, calculate the average arrival interval of the car at that point again by steps M25 to M29, and hold it. maxt. When checking is completed for all cars, the maximum average interval among the average arrival intervals at each expected arrival time of each car that will arrive at the standard floor after the recall candidate car is finally determined as maxt. Become.

In the above embodiment, the current time is considered as the reference floor, and the most recent time in the past when the car arrived is considered as the predetermined time.
The present invention is not limited to this, and, for example, the expected arrival time of the recall candidate car may be used as the arrival time of a car that has (will) arrive at the reference floor immediately before the expected arrival time.

〔Effect of the invention〕

According to the present invention, it is possible to always call the cars back to the standard floor at appropriate intervals, thereby preventing dumping, maximizing transport capacity, and alleviating passenger irritation, especially when dispatched. .

In addition, even in the case of buildings where dispatch time varies, it is possible to automatically detect traffic flow at the time of dispatch and respond accordingly.
More flexible services can be provided.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is a block circuit diagram of a group management device, FIG. FIG. 4 is a flowchart showing the procedure for calculating the car arrival interval according to the present invention, FIG. 5 is a flowchart showing the procedure for calculating the maximum average arrival interval according to the invention, and FIG. 6 is a flowchart for explaining the present invention. A diagram showing an example of the operation line of each car,
FIG. 7 is a diagram showing an example of the operation line of each car under conventional group management control. 10... Group management device 10A... Hall call registration means 10B... Allocation means 10C... Up-beak detection means 100... Call-back candidate car selection means 10B... Car arrival interval calculation means

Claims (2)

[Claims] (1) Multiple elevators are put into service for multiple floors, and control is performed such as assigning the optimal car to hall calls common to these multiple elevators, and all car calls and hall calls are controlled. In an elevator group control device that responds to calls and returns cars that have finished service to the standard floor, there is a means for detecting an up-peak from the traffic demand situation, and a means to respond to all car calls and hall calls and terminate service. means for selecting a car that has been recalled as a recall candidate car; means for calculating an arrival interval of cars after a predetermined time point at an expected arrival time when the recall candidate car is called back to a reference floor; and said recall candidate car. means for calculating a maximum average arrival interval among each average arrival interval after a predetermined time point at each expected arrival time of each car that arrives at a reference floor after the car, and when the arrival interval is larger than the maximum average arrival interval; Immediately output a reference floor recall command to the callback candidate car, and when the arrival interval is smaller than the maximum average arrival interval, when the arrival interval becomes equal to or larger than the maximum average arrival interval. , means for outputting a standard floor recall command to the recall candidate car. (2) The elevator group management system according to claim 1, wherein the predetermined time is the most recent arrival of a car at the reference floor.