JPS6216909B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for group control operation of elevators.

When a hall call is registered, an assignment-based group control elevator calculates an evaluation value by predicting the service situation for passengers waiting at the hall (e.g., waiting time, full passage, first arrival of service cars, etc.), and calculates the evaluation value as the best one. The car is assigned to the above-mentioned hall call,
The car operates by sequentially responding to car calls and landing calls assigned as described above.

Conventionally, in group control elevators using this allocation method,
If there are multiple cars with the best evaluation value,
One assigned car is selected according to a preset priority order (for example, starting from the lowest car number). However, in buildings where elevator traffic is relatively quiet, there are often multiple cars with the best evaluation value, so the higher the priority, the higher the activation frequency, and the activation frequency of each car is imbalanced. becomes. If the starting frequencies become unbalanced in this way, the cars that are started more frequently will be more likely to break down, and the mechanical parts will wear out more, resulting in an increase in the frequency of maintenance. As a result, the frequency of maintenance for each car becomes uneven, which is not desirable in terms of maintenance.

Therefore, in order to balance the activation frequency of each car, a device (activation frequency meter) that measures the activation frequency is installed and the activation frequency is measured for each car. It has been proposed to average out the activation frequency among cars by prohibiting or restricting new allocation to cars with the number of cars above the average value.

However, this requires a starting frequency meter to be installed in each car, which is expensive. In addition, even if a car is nearby, allocation is prohibited just because the activation frequency exceeds a predetermined number, and a car that is far away is selected as the allocated car, resulting in customers waiting at the landing waiting for a long time and becoming irritated. This may lead to problems with the service.

The purpose of this invention is to improve the above-mentioned problems, and an object of the present invention is to provide an elevator group management device that can average the activation frequency of each car when there are multiple cars with the same service evaluation value for hall calls. shall be.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 indicates that when a new hall call is registered, for example, it is temporarily assigned to each car, the hall waiting time for the assigned call of each car at that time is predicted, the sum is calculated, and each evaluation value signal is sent. 1a,
1b is a known evaluation value calculation device; 2 is an assigned car selection circuit; 3 and 4 are comparators whose output is "H" when input X<input Y; otherwise, output is "L"; 5 to 7; is a NOT gate, 8 to 10 are AND gates, 11 and 12 are OR gates, 11a and 12a
are the outputs of OR gates 11 and 12, which are the allocated car selection signals for car No. 1 and car No. 2, respectively, 131 to 135.
142 to 146 are 2 up call signals that become "H" when an up call from the landing on the 1st to 5th floors is registered.
A down call signal that becomes "H" when a down call from a floor to the 6th floor is registered; 15 is a selection order setting circuit; 1
6 to 25 are a certain period of time (for example, 0.5 seconds) when the input changes from "L" to "H" as shown in Figure 2.
A pulse generator that emits pulse signals 16a to 25a that become "H", 26 is an OR gate, and 27 is an OR gate that changes the priority signal 27a from "L" to "H" or from "H" to "H" every time the input becomes "H". This is a signal switching circuit that can be switched to "L".

Next, the operation of this embodiment will be explained.

Now, let us assume that Unit 1 is on the 1st floor, has an upward direction set, and has a car call on the 6th floor registered, and Unit 2 is also on the 1st floor, but its direction has not been set and it is waiting with the door closed. Suppose that

Let us now assume that an up-call to the landing on the 5th floor is registered. The time required for the No. 1 car to respond to the up call on the 5th floor is calculated as 2 [seconds] x 4 [floors] = 8 seconds, assuming that it takes 2 seconds to travel to the first floor. Similarly, the time for Unit 2 is calculated to be 8 seconds. Therefore, the evaluation value signal 1a when the up call on the 5th floor is provisionally assigned to the No. 1 car is "8", and the evaluation value signal 1b when it is provisionally allocated to the No. 2 car is also "8". As a result, the outputs of comparators 3 and 4 both become "L",
The outputs of NOT gates 5 and 6 both become “H”.
The output of AND gate 8 becomes "H".

On the other hand, it is assumed that the priority signal 27a before the up call for the 5th floor is registered is "L" (when priority is given to the 2nd car). When the fifth floor up call signal 135 becomes "H", the pulse signal 20a becomes "H" and the output of the OR gate 26 also becomes "H". The signal switching circuit 27 now operates, and the priority signal 27
a changes from "L" to "H". Therefore AND
The output of gate 9 becomes "H", and OR gate 11
The assigned car selection signal 11a of car No. 1, which is the output of , becomes "H". Further, the output of the NOT gate 7 becomes "L", and the output of the AND gate 10 also becomes "L". Since the output of the comparator 4 is also "L" as described above, the allocated car selection signal 12a of the second car, which is the output of the OR gate 12, is "L". This is 1
This meant that the car was assigned to the 5th floor up call. That is, when the evaluation values are equal, the first car is selected as the assigned car according to the priority set by the selection order setting circuit 15.

Next, one second after the 5th floor up call was registered,
The down call for the 6th floor is registered and the down call signal 146
becomes "H", the pulse signal 25a becomes "H", the output of the OR gate 26 also becomes "H", the signal switching circuit 27 operates again, and the priority signal 27a changes from "H" to "L". "become. At this time,
If the evaluation value for the 6th floor down call is equal for Unit 1 and Unit 2, AND gate 8 is applied as described above.
Since the output of the car becomes "H", the assigned car selection signal 12a of the second car becomes "H", the assigned car selection signal 11a of the first car becomes "L", and the second car is assigned to the down call on the 6th floor. Become. In this way, when the evaluation values are equal, the priority order of assigned car selection is changed every time a hall call is newly registered.

However, in the case of the example, the predicted waiting time for a call going up to the 5th floor of car No. 1 is that the duration of the call is 1 second,
The expected arrival time is 8 seconds as mentioned above, so the expected arrival time is 1+
8=9 seconds. In addition, the predicted waiting time for a call going down to the 6th floor of Unit 1 is that the call duration is 0 seconds, and the predicted arrival time is travel time 2 [seconds] x 5 [stops] = 10
In seconds, if one stop time is 10 seconds, the time to stop once on the assigned 5th floor is 10 [seconds] x 1
[times] = 10 seconds, so 0 + 10 + 10 = 20 seconds. On the other hand, the predicted waiting time for a 5th floor up call for the second car is 9 seconds, the same as for the first car. In addition, the predicted waiting time for a call going down to the 6th floor of Unit 2 is that the call duration is 0 seconds, and the predicted arrival time is 10 seconds.
Since the stop time is 0 seconds (there is no call until the 6th floor), 0+10+0=10 seconds. Therefore, the evaluation value of the first machine is 9+20=29 seconds, and the evaluation value of the second machine is 9+10=19 seconds. Now, the output of comparator 3 is "L", the output of comparator 4 is "H", and OR
The assigned car selection signal 12a of the second car, which is the output of the gate 12, becomes "H", and the second car is selected as the assigned car.

Although the embodiment has been described for the case of two cars, it can also be applied to the case of three or more cars.

In addition, the priority order is determined as in the example (for example, assuming 3 cars): 1st car>2nd car>3rd car, then 2nd car>3rd car>1st car, then 3rd car>
Unit 2 > Unit 1, Unit 1 again > Unit 2 > Unit 3...
Decide in a circular manner as follows: Unit 1 > Unit 2 > Unit 3, Unit 2 > Unit 1 > Unit 3, Unit 3 > 1
Determined in a permuted manner as Unit 2>Unit 2, Unit 1>Unit 3>Unit 2, Unit 2>Unit 3>Unit 1, Unit 3>Unit 2>Unit 1, randomly determined by random numbers,
In other words, if the priority order of each car is not fixed, such as using a startup frequency meter to determine the priority of the cars with the lowest activation frequency, but the number of activations of each car is equal as a result, what is the best way to determine the priority order? It may be determined in any way.

Also, set the above priority for a certain period of time (for example, 10 seconds)
It may be changed every time or every fixed number of times (for example, 10 times).

Furthermore, it is also possible to use a combination of the predicted waiting time, the probability that the car will be full, the probability that a car other than the predicted car will arrive first, etc. as the evaluation value.

Furthermore, in the above embodiment, after the hall call is registered, the evaluation value is calculated and the assigned car is selected. It is also possible to apply this method to a method in which the above-mentioned assigned car is made to respond.

As explained above, in the present invention, a selection order setting circuit is provided which determines the selection order of the allocated cars according to predetermined conditions, and when there are a plurality of cars with the same service evaluation value, the allocated cars are selected according to the order determined by the selection order setting circuit. Since this is selected, the activation frequency among the cars can be averaged, and the number of maintenance times for each car can be made uniform. Moreover, it can be constructed at low cost.

[Brief explanation of the drawing]

FIG. 1 is a logic circuit diagram showing an embodiment of an elevator group management device according to the present invention, and FIG. 2 is a pulse signal waveform diagram of FIG. 1. 1...Evaluation value calculation device, 2...Assigned car selection circuit, 3, 4...Comparator, 5-7...NOT gate, 8-10...AND gate, 11, 12...
OR gate, 131-135...Passenger hall up call signal for 1st to 5th floors, 142-146...Passenger hall down call signal for 2nd to 6th floors, 15...Selection order setting circuit, 16-25...Pulse generation Vessel, 26...OR
Gate, 27...signal switching circuit. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of Claims] 1. Evaluation value calculating means for calculating a service evaluation value when a hall call is assigned to each car, and selection order setting for setting a selection order when there is a plurality of cars with the best evaluation value. an assigned car selection means which selects the car with the best evaluation value according to the selection order and allocates it to the hall call; when the allocated car selection means selects the car, the selection order setting means selects the car with the best evaluation value according to the selection order; An elevator group management device characterized by comprising a changing means for changing the set selection order to another selection order. 2. The elevator group management device according to claim 1, wherein the changing means changes the selection order every time a certain period of time elapses. 3. The group of elevators according to claim 1, wherein the changing means changes the selection order to another selection order when the number of hall calls generated from the time when the selection order is changed reaches a certain value. Management device.