JPS63196477A - Group controller for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to group management control of elevators, and in particular, it uses a small computer such as a microcomputer to determine the optimum elevator number for a hall call generated by using an evaluation formula. The present invention relates to a group management control device that selects and allocates.

(Prior Art) In recent years, group management control devices that control multiple elevators have become common, using small computers such as microcomputers. In order to decide,
A so-called evaluation formula is used. The evaluation formula f is usually expressed by the following formula.

f = F (X* −Ct −Wt) +TaF
:Evaluation function This evaluation formula can determine the elevator that can most rationally respond to a hall call command based on the information at the time the hall call command was generated. The elevator may become full and pass the floor before you can answer the hall call, or you may have to wait a long time for the hall call due to a call that occurred because you answered a hall call on an intermediate floor. be.

Conventionally, in such cases, the evaluation formula was changed by treating the hall call as a long-waiting call when the duration of the hall call exceeded a certain value (the set value may differ depending on the traffic demand state). Recalculate the calculation.

Cancellation of existing assignments and reassignment (generally referred to as forecast change)
We are implementing relief measures for long-awaited calls.

However, if there are many long-waiting calls during high-demand times such as lunch hours and clock-off hours, it is difficult to judge whether long-waiting calls are occurring.
If the fixed standard is a constant value, there is a problem that the number of hall calls that are subject to long-waiting call relief increases, making it impossible to implement effective long-waiting call relief. One method for solving this problem is proposed in Japanese Patent Laid-Open No. 125579/1983.

[Problem that the invention seeks to solve]

In order to equalize the response time for each multiplier, elevators using the group control system have each elevator standby at a designated floor during off-peak hours when the demand for elevators is low, and even one of them is on standby when a call is made. When a response is received, the control device issues an operation command to other elevators to enter the standby pattern state at this time, and this operation is not for passenger transportation and is a waste of elevator movement, so in recent years In buildings that promote energy conservation, some elevators are taken out of service during quiet periods like this. Further, when performing periodic inspections, the elevator may be separated from group management control. In this way, even when the number of elevators subject to group management control is small, if traffic demand increases, the above-mentioned conventional technology has been adapted to achieve the above-mentioned effects depending on the situation. In the conventional method, since it is necessary to monitor the state of traffic demand, there is a problem that the load factor of the microcomputer increases.

SUMMARY OF THE INVENTION An object of the invention is to provide a group management control system for elevators that is equipped with a system that can change the criteria for determining long-waiting calls without increasing the load factor of a microcomputer.

[Means for solving problems]

In this invention, long-waiting call criteria are stored in advance in a storage device according to the number of elevators that can be serviced, and are read out from the storage device in response to a signal indicating that the elevator is not in service. Configure it to be set.

[Effect]

With this configuration, the criteria for determining a long-waiting call can be set using only the signal when the elevator is out of service. An arithmetic processing program based on data from the state is no longer necessary, and the load factor on the microcomputer can be reduced by the amount of processing required.

〔Example〕

An embodiment of the present invention shown in the drawings will be described below.

First, the building targeted by this embodiment will be explained with reference to FIG. 2. The building schematically shown in Figure 1 is A
, B, C, and D. Each of the elevators A to D is controlled by a group management control device having a configuration shown in block form in FIG.

In FIG. 1, 1 is a hall call command registration circuit. When registering a hall call command, registers for the corresponding floor and direction are set, and when the car arrives at the hall call command floor,
It will be reset.

2A to 2D are elevator operation control devices provided for each of the four elevators A to D, and the car status memory circuit m
3A to 3D, car call storage circuits 4A to 4D, and hall call allocation storage circuits 5A to 5D are provided separately. The car state storage circuits 3A to 3D are buffers for the car driving method, position, driving direction, load signal, etc. The car call storage circuits 4A to 4D are set when a car call command is registered, and are reset when the car arrives at the floor where the call command is registered.

Hall call assignment memory circuits 5A to 5D are set when a hall call is assigned, and at the same time display a forecast for the hall lantern (not shown). 7 is a wiper select circuit.

On the other hand, 19 is a small computer using, for example, a 16-bit microcomputer, and has an output register 9, an input register 10, and an output register 11. register 9
．． 11 has a function of holding the same output until the next output is issued.

In a device with such a configuration, the wiper select circuit 7 is operated by the sub-address signal output from the output register 9 of the small computer 19, and the input register 10 of the small computer 19 is operated according to the select code output from the output register 9. Information outside the computer is stored in a memory area within the computer. Based on this information, the optimum elevator is determined for the generated hall call command and output from the output register 11. The output data is decoded by the decoding circuit 11 and registered as an assigned call in the hall call assignment storage circuits 5A to 5D of the assigned car, and is reset when the car arrives at the hall call registration floor. Further, the hall call allocation storage circuits 5A to 5D are combined with the hall call storage circuit 1 to create a hall condition storage circuit 6.
is stored in the hole condition storage section 13 in the RAM via the wiper select circuit.

Note that the arrow lines connecting each circuit in FIG. 1 indicate a plurality of parallel signal lines, for example, sixteen parallel signal lines.

Next, we will use the flowcharts shown in Figures 3(a) and (b) to explain the process from when a hall call command is issued to an arbitrary floor to allocating the optimal car for that hall call. explain.

First, starting from step Q1 in FIG. 3(a), in step Q2, the status of each machine is stored in the RAM from 3A to 3D in FIG. 1 via the wiper select circuit 7 and the input register 10.
Next, in step Q2, the hole condition is stored in the RAM. In step Q3, the states and hall conditions of all machines are read from the RAM, the hall call assignment processing section assigns the hall call to the optimum elevator, and in step Q14 of FIG. 3(b) the hall call assignment is output to the output register. Although the hall call assignment has been completed in step Q4, if it takes a long time to arrive at the floor of the assigned car hall call due to fullness or other conditions, the hall call will have to wait for a long time and the service will deteriorate. By setting a standard value, and if there is an elevator that can arrive earlier than the allocated elevator by more than the standard value, by changing the assignment to that elevator,
This can prevent service deterioration. Step Q
This has been done since 5. In steps Q5 to Q8, the number of elevators that can be serviced is checked based on the car status of all elevators, and the long waiting judgment criterion value is set according to the number of elevators.
It is read from the data table of the long waiting determination reference value in the OM, and further, the predicted arrival time of the allocated elevator is calculated in the hall call allocation processing section and compared with the long waiting determination reference value. As a result, if the long-lasting determination reference value is larger, the allocation is not changed, but if the predicted arrival time is larger, the process moves to the next step Q9.

In 22, the long waiting judgment reference value T1 is read out as a different value depending on the number of elevators under group management control. When the number of elevators being used for elevators decreases, the duration of all hall calls becomes relatively long, so if the criteria for determining long-waiting calls is a constant value, hall calls that are reassigned to relieve long-waiting calls will become relatively long. , and it becomes impossible to carry out effective relief for long-waiting calls. Therefore, frequent assignment changes are prevented by increasing the long waiting determination reference value as the number of elevators under group management control decreases.

Furthermore, in steps Q9 to Q12, even if it is determined that the allocated hall call is a long-waiting call, the allocation is not changed if there is no elevator that can arrive earlier than the allocation change reference value of 14. This prevents ineffective allocation changes by providing an allocation change reference value, for example, even if there are many long-waiting calls. This allocation change reference value is set to a smaller value as the number of elevators decreases, in order to respond more quickly to long-lasting hall calls when the number of elevators decreases and the duration of hall calls increases, thereby improving service.

In this way, in order to prevent frequent allocation changes, a long waiting judgment reference value and an allocation change reference value are set, and if a hall that passes these two reference values is called, the allocated elevator is change.

According to this control method, even if the number of elevators subject to group management control decreases, the two reference values for changing assignments are automatically changed according to the number of elevators, so long-lasting calls can be maintained. Relief operations can be carried out extremely effectively, and unnecessary relief operations for long-waiting calls can be avoided.

Furthermore, since there is no need to monitor traffic demand, there is no need to increase the load factor of the microcomputer.

〔Effect of the invention〕

According to the present invention, it is possible to very effectively perform long-waiting call relief for relatively long-waiting calls according to the number of elevators that are managed and controlled in one group without increasing the load factor of the microcomputer. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a group management control device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a building to which the present invention is applied. FIG. 3 is a flowchart showing the operation of the present invention. 1...Hall call storage circuit, 2A-2D...Elevator operation control device.

Claims (1)

[Scope of Claims] 1. In an elevator system in which a plurality of elevators are installed in parallel and an optimum elevator is assigned as a service elevator to a hall call command according to an evaluation formula for a common hall call command, 1. A group management control device for elevators, comprising means for changing a criterion for changing reservations according to the number of elevators that can be serviced.