JPS6223707B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for controlling an elevator.

Conventionally, as an operation control device for reducing the power consumption of an elevator, there is, for example, Japanese Patent Application No. 128371/1982 (Japanese Patent Application No. 57168/1983), which describes a device that saves power by reducing the speed of a car. something is shown. In this method of reducing the speed of the cars, the number of cars in operation is maintained as is, so the amount of electricity that is basically required is consumed regardless of whether the cars are in operation or stopped, regardless of whether they are in power-saving mode or not. It turns out. That is, the power saving effect is small if the distance traveled per drive is short, the vehicle is decelerated before reaching the rated speed, or the driving time at the rated speed is short.

Therefore, in order to increase the power saving effect, it is better to reduce the number of cars in operation.

However, due to the limit on the number of cars in operation, the time it takes to arrive at the scheduled floor increases accordingly. There may be cases in which the impact on waiting time for a car cannot be ignored. Therefore, conventionally, the number of vehicles in operation is limited and operated only during times when the impact on passenger service is expected to be small (for example, off-peak hours such as nighttime).

However, in recent years, social demands for energy conservation have increased, and operation that is more energy efficient than ever has become necessary. Therefore, it is conceivable to apply the above-mentioned power saving operation by changing the number of operating vehicles even outside of off-peak hours, but it must be avoided that the service to passengers becomes extremely poor. Therefore, if multiple cars are installed, the number of cars being operated can be changed depending on the time of day.
It is also proposed to maintain a certain level of service to passengers. In this case, it is desirable to select a number that maximizes the power saving effect in each time period while maintaining the service to passengers at a certain level as described above. However, since traffic conditions vary depending on the building, it is difficult to set the optimal number of cars in advance. Furthermore, even if this is possible, after many years have passed, traffic conditions may have changed and the number of cars may no longer be optimal, and the staff will have to reset the number of cars each time. This will impose a labor-intensive work burden.

This invention aims to improve the above-mentioned problems, and automatically selects the number of out-of-operation cars that will increase the power saving effect and will not significantly degrade the service to passengers, without imposing the burden on attendants etc. to reset the settings. The purpose of the present invention is to provide an elevator control device that provides a control system for an elevator.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In Figure 1, 1 is a hall call signal that is issued in response to the registration of a hall call for each floor, and 2 is a power consumption measurement corresponding to the output of an integrating wattmeter (not shown) connected to the elevator power supply. signal, 3 is a modifiable signal that becomes "H" when a switch (not shown) for resetting the optimum number of idle cars is operated; 4 is a time period signal that becomes "H" at a predetermined time every day; 5 5a is a power consumption amount signal, 5b is an average waiting time signal, and 6 is a temporarily suspended car number signal 7a, which will be explained later. 6a is an initial reset signal; 6b is a modified interruption signal; 6c is a determination device that determines whether the number of temporarily suspended cars is optimal based on the power consumption and average waiting time of other operating cars during the required time period; is an optimal idle car number signal, 7 is a idle car number setting device that sets the idle car number according to a predetermined time period and a correctable period, 7a is a temporary idle car number signal, 7b is a idle car number designation signal, and 8 is a specified number. 1 depending on the number of
A car selection device selects a car to be stopped from among the cars of cars No. 5 to No. 5 and generates selection signals 8 to 8E, 9A is a car control device that operates the car of No. 1, and 9B to 9E are cars of cars No. 2 to This is a car control device that operates the car of car No. 5.

In Figure 2, 1u to 5u are the up-hall call signals that become "H" when the up-hall calls from the 1st to 5th floors are registered, and 2d to 6d are the down-hall calls from the 2nd to 6th floors. and “H” down the hall call signal (first
The hall call signal 1 in the figure is the above-mentioned signals 1u to 5u, 2d.
-6d), 1Au to 5Au are arithmetic circuits for the upward direction on the 1st to 5th floors, 2Ad to 6Ad are arithmetic circuits for the downward direction on the 2nd to 6th floors, 11 is an AND gate, 12
resets the contents to zero when input R is “H”,
A time counter that adds the contents (time) by 1 every second when the input I is "H" and holds the contents as is when the input I becomes "L", 13 is when the input R is "H" When the content is reset to zero and the input I changes from "L" to "H", the content (number of pulses)
14 and 15 are adders, 16 is a divider that divides input X by input Y, 17 is an AND gate, and 18 is when the input changes from "L" to "H". A pulse generator that emits one pulse signal; 19 to 21 are storage devices that store the input I as is when the input G is "H"; and retain the stored contents even when the input G becomes "L";22; is a subtracter that subtracts input Y from input X.

In Fig. 3, 25 is a pulse generator similar to the pulse generator 18 in Fig. 2, 26 is a constant value signal corresponding to the number of cars emitted at times other than the predetermined time period, and 27 is a power amount of 1000 KWH. 28 is a constant value signal corresponding to the electric energy of 3KWH,
29 is a constant value signal corresponding to a time of 30 seconds, 30,3
1 is a storage device 32 that stores input _{I 1 when} input G 1 is “H”, stores input I ₂ when input G ₂ is “H”, and retains the memory contents at other times; is a subtractor that subtracts input Y from input
AND gate, 36-38 are NOT gates, 39 is
It is an OR gate.

In Figure 4, 43 is a NOT gate, 44 is an AND gate, 45 is a pulse counter similar to the pulse counter 13 in Figure 2, 46 is a constant value signal corresponding to 6 times, and 47 is 1 car. 49 is a constant value signal corresponding to zero number of cars,
50 is a comparator whose output is "H" when the input is X and input Y, and whose output is "L"otherwise; 51
is an OR gate, 52 is an R-S flip-flop (hereinafter referred to as memory), 53 and 54 are NOT gates, 55 and 56 are AND gates, 58 is a subtracter that subtracts input Y from input X, and 59 is an input G ₁ This is a selection circuit that generates the input _I1 as the car number designation signal 7b when the signal is "H", the input _I2 when the input _G2 is "H", and the input _I3 when the input _G3 is "H". .

Next, the operation of this embodiment will be explained.

In cases other than the predetermined time period (14.00-15.00), the time period signal 4 in FIG. 4 is "L",
The output of NOT gate 54 is "H". Therefore, the selection circuit 59 selects the constant value signal 49,
The idle car number designation signal 7b becomes zero, the idle car selection device 8 of FIG. 1 operates accordingly, and the selection signals 8A to 8E become "L". Therefore,
The idle car is not selected, and all car car control devices 9A
- Operated by 9E.

When the predetermined time period arrives (however, the reset switch is open), since the correctable signal 3 in FIG. 3 is "L", the output of the NOT gate 37 becomes "H", and the OR gate The correction interruption signal 6b, which is the output of the circuit 39, becomes "H". Now, the output of the OR gate 51 in FIG. 4 becomes "H" and the memory 52 is set. Since the time zone signal 4 is "H", the output of the AND gate 55 is "H", and the selection circuit 59 selects the memory device 30 shown in FIG.
The optimal idle car number signal 6c (the value already stored as the temporarily idle car number signal 7a is set to 1 car) stored in the idle car number signal 6c is selected, the idle car number designation signal 7b becomes 1 car, and the idle car selection device 8, one car is selected in a predetermined order (car No. 1 → car No. 2 → car No. 3 → car No. 4 → car No. 5), the selection signal 8A is "H", and the other selection signals 8
B to 8E are "L". Therefore, only Unit 1 is suspended.

If the traffic situation in the building changes and the staff determines that it is necessary to reset the optimal number of idle cars and closes the reset switch at a time other than the designated time,
Correctable signal 3 becomes “H” and NOT gate 37
The output becomes "L". Pulse generator 2 in Figure 3
5 emits a pulse, and the initial reset signal 6a becomes "H". A constant value signal 26 is stored in the storage device 30.
is stored, and the optimal idle car number signal 6c becomes zero. On the other hand, the constant value signal 27 is stored in the storage device 31, and its output becomes 1000KWH. Moreover, when the initial reset signal 6a becomes "H" in FIG.
The contents of pulse counter 45 become zero. At the same time, the memory 52 is reset and its output becomes "L", and the output of the AND gate 55 also becomes "L". Furthermore, since the time zone signal 4 is "L", the output of the AND gate 56 is also "L", and the NOT gate 5
The output of 4 becomes "H". Therefore, the constant value signal 49 is selected by the selection circuit 59, and the number of cars to be stopped is zero, that is, all the cars are operated.

Next, when a predetermined time period arrives in this state, the time period signal 4 in FIG. 2 becomes "H", and the AND gate 1
7 also becomes "H", and the pulse generator 18 generates a pulse. The power consumption measurement signal 2 at that time is now stored in the storage device 19, and it is
Suppose it is 150KWH. Since the output of the storage device 19 and the signal 2 are equal, the output of the subtracter 22 becomes zero, zero is stored in the storage device 20, and the power consumption signal 5a becomes zero. In addition, due to the above pulse,
The contents of the time counter 12 and pulse counter 13 of the first-floor upward direction calculation circuit 1Au are both reset to zero. Arithmetic circuits on other floors 2Au~5Au, 6Ad~2
The same applies to Ads. Therefore, the outputs of adders 14 and 15 are both zero, the output of divider 16 is also zero, zero is stored in storage device 21, and average waiting time signal 5b is zero. Now, the output of the comparator 34 in FIG. 3 becomes "H" and NOT
The output of the gate 38 becomes "L". On the other hand, when the initial reset signal 6a in FIG. 4 becomes "L",
The output of the NOT gate 43 becomes "H", the output of the AND gate 44 changes from "L" to "H", and the content of the pulse counter 45 changes from zero to one. Subtractor 5
8, 1-1=0 units is calculated. Further, the output of the comparator 50 becomes "L". As mentioned above, the outputs of NOT gates 37 and 38 in FIG. 3 are "L".
, the modified interrupt signal 6 which is the output of the OR gate 39
Since b is also "L", the output of OR gate 51 is "L". The output of the memory 52 is "L"
As it is, the output of the NOT gate 53 becomes "H", and since the time zone signal 4 is "H", the output of the AND gate 56 becomes "H". Therefore, the selection circuit 59 selects the output of the subtracter 58,
The idle car number designation signal 7b becomes zero, and all cars are operated at first as the first step of resetting the optimum idle car number.

The stored values of the storage device 19 in FIG. 2 are as described above.
150KWH, and the amount of power consumed during operation is indicated by the power consumption measurement signal 2, so
The subtracter 22 calculates the amount of power consumed after entering the predetermined time period. And the result is
Since the output of AND gate 12 is "H",
The information is stored in the storage device 20 from time to time.

On the other hand, each time a hall call is registered, the arithmetic circuit 1
In Au~5Au and 6Ad~2Ad, the number and duration of the calls are counted. For example, when an up call on the first floor is registered, when the signal 1u changes from "L" to "H", the output of the AND gate 11 becomes "H", and the contents of the pulse counter 13 are added by one. Ru. Further, the time counter 12 increments the contents every second until the car responds to this call. When the car responds to the up call on the first floor, the signal 1u becomes "L", so the output of the AND gate 11 becomes "L", and the contents of the time counter 12 are held as they are. The adder 14 calculates the sum of the durations of all hall calls (including calls answered so far), and the adder 15 calculates the sum of the durations of all hall calls (including calls answered so far). The sum is calculated. The average waiting time at that point in time is calculated by the divider 16 and stored in the storage device 21 from time to time.

When the predetermined time period elapses in this state, the time period signal 4 in FIG. 3 becomes "L", so the output of the NOT gate 36 becomes "H". Average waiting time signal 5b
When the time is 15 seconds, the output of the comparator 34 becomes "H". When the power consumption signal 5a is 25KWH, the output of the storage device 31 is 1000KWH, so the output of the subtracter 32 is 1000-25=975KWH, and the output of the comparator 33 is "H". with this,
Since all the inputs of the AND gate 35 are "H", its output becomes "H". Therefore, the temporary idle car number signal 7a is stored in the storage device 30, and the optimum idle car number signal 6a becomes zero. Furthermore, the power consumption signal 5a is stored in the storage device 31, and its output is 25KWH. The output of the subtracter 32 becomes 25-25=0, and the output of the comparator 33 becomes "L", so the output of the AND gate 35 becomes "L".

The next day, when the predetermined time zone returns, the time zone signal 4 in FIG.
The contents of the one-hour counter 12 and pulse counter 13 are set to the initial state. On the other hand, when the output of the AND gate 44 in FIG. 4 becomes "H", the content of the pulse counter 45 changes from 1 to 2. In the subtracter 58, 2
-1=1 unit is calculated. Also, the output of the comparator 50 remains "L", the output of the NOT gate 53 becomes "H", and the output of the AND gate 56 becomes "H", so the second time (second day) is a temporary suspension. The car number signal 7a is 1 car, and the idle car number designation signal 7
b will also be one unit. Therefore, the selection signal 8A of the idle car selection device 8 is "H", and the other selection signals 8B~
8E becomes "L" and only Unit 1 is out of service. In this way, at a predetermined time every day, the contents of the pulse counter 45 are added one by one, and the temporarily idle car number signal 7a increases by one.
The car to be idle is selected according to the number of cars.

In the same manner as described above, in FIG. 2, when the number of idle cars is 1, the power consumption signal 5a in the required time period is determined to be 23KW, and the average waiting time signal 5b is determined to be 17 seconds. The output of 32 is 25−
23=2KWH, the comparator output becomes "L",
The output of the AND gate 53 becomes "L". Therefore, even after the predetermined time period, the storage devices 30, 3
The contents of 1 do not change.

The third time (2 idle cars), the power consumption signal 5
Assuming that a is 21KWH and the average waiting time 5b is 20 seconds, the output of the subtractor 32 in FIG. 3 is 25-21=
At 4KWH, the output of the comparator 33 becomes "H". Therefore, after the predetermined time period passes, the output of the AND gate 35 becomes "H", and the storage device 30
There are two new storage devices, and the storage device 31 has a new storage capacity of 21KW.

In the same way, when the fifth time (four cars are at rest) is completed and the sixth time is started, the pulse counter 45 shown in FIG.
The content of is 6, which is equal to the constant value signal 46, so the output of the comparator 50 becomes "H", the output of the OR gate 51 also becomes "H", the memory 52 is set, and its output becomes "H". ”. with this,
The output of the AND gate 55 becomes "H", and the selection circuit 59 generates the optimal idle car number signal 6c stored in the storage device 30 of FIG. 3 as the idle car number designation signal 7b.

If, for example, the fourth time (number of idle cars is 3) before the end of the fifth time, the power consumption signal 5a is
16KWH and the average waiting time signal 5b is 32 seconds, the output of the subtracter 32 is 21-16=5KWH, the output of the comparator 33 is "H", but the output of the comparator 34 is "L". ”. Therefore, AND gate 3
The output of 5 remains "L", and the storage devices 30 and 31
The contents are not updated. Since the output of the NOT gate 33 becomes "H", the modified interruption signal 6b, which is the output of the OR gate 39, becomes "H". Therefore, the output of the OR gate 51 in FIG. 4 becomes "H", the memory 52 is set, and the output of the AND gate 55 becomes "H" at a predetermined time period. The selection circuit 59 selects the optimal idle car number signal 6c stored in the storage device 30 of FIG. 3 by the end of the third cycle, and generates the idle car number designation signal 7b as two cars.

Thereafter, at a predetermined time every day, the car will be operated with the new optimal number of idle cars, which is two.

Furthermore, if the reset switch is released before the end of the fifth time, for example before entering the fourth time, the output of the NOT gate 37 in FIG. 3 becomes "H", and the correction interruption signal 6b is The signal becomes "H", and the optimum idle car number signal 6c is set to the optimum speed up to that point, that is, 2 cars.

In the embodiment, a case has been described in which five cars are installed in a six-story building, but the number of floors and the number of cars are not limited in any way.

It is also possible to implement as follows.

Although the predetermined time period is set to one hour from 14.00 to 15.00, (a) Divide the day into multiple time periods and set the optimal number of idle cars for each time period.

(b) Do not fix the time width of each time period to 1 hour,
It can be set in detail, such as minutes, 30 minutes, 2 hours, etc., depending on the traffic conditions at that time, or it can be set roughly.

The method for determining the optimal number of idle cars was as follows: (a) Starting from zero, the number of idle cars was increased one by one, and the optimum number of idle cars was determined based on the results. Efficient means to select at least the optimal number of idle cars, or efficient means to determine the number of idle cars to a certain extent so that a certain degree of power saving effect can be achieved even during trial operation. Try to use the means.

(b) Although it was decided to conduct the test run only once for each number of idle cars, taking into consideration that there may be differences in power consumption and waiting time depending on traffic conditions, etc., we decided to conduct the test run with the same number of cars several times. Repeat and judge based on the results. If you do this,
The optimal number of idle machines can be determined accurately.

(C) When comparing the power saving effect, the number of idle machines will not be updated unless the difference is at least a certain value (3KWH) (in other words, the number of idle machines will not be increased beyond that value, but this is due to the power saving effect). This means that power saving will not be done even if it means deteriorating passenger service unless it improves to some extent. However, if power saving is still the main consideration, the value of constant value signal 28 should be set to a small value. .

(D) The number of idle machines was changed on a trial basis every day, but it may be changed every 2 to 3 days, or
Switch the number of machines to several types at the same time of the day.

(e) The average waiting time was used as a judgment value for passenger service status, but it is possible to use the maximum waiting time, long waiting rate (rate of calls made to wait longer than a specified time), boarding time, forecast change rate, etc. Also, they are used in combination.

(F) When the average waiting time exceeds a predetermined value, it is determined that increasing the number of idle cars will only worsen passenger service, so the test operation is interrupted and the number of idle cars that have been tried up to that point is stopped. , the number of buses with the lowest power consumption was selected as the optimal number of idle vehicles, but when a test run was performed to the point where only one vehicle was operated and all others were suspended, passenger service was found to be worse than the predetermined level. Avoid selecting the number of cars as the optimal number of idle cars.

The optimal number of idle machines is only reset when a staff member operates a switch, but this can be done automatically every predetermined period of time, such as every month, every six months, or every year. Reset the optimal number of idle machines.

In the idle car selection device 8, when the number of idle cars is designated by the optimum idle car number signal 6c, the idle car selection device 8 selects the cars in a predetermined order (1
Cars are now selected for cars (from car No. 2 to car No. 2...), but this may have a large impact on passenger service, such as cars that are likely to have long waits for boarding calls or cars that have a large number of boarding calls. A basket other than the basket is selected preferentially.

As explained above, the present invention provides an elevator control device that performs power-saving operation by operating a predetermined number of cars out of a plurality of cars and stopping the others. The power consumption of each number of vehicles is measured using a power measuring means, and the passenger service status of each number of vehicles is determined to be good or bad. Since the number of vehicles in operation is selected and set to the minimum, it is possible to automatically set the number of vehicles in operation that achieves a high power saving effect and does not significantly reduce passenger service without imposing a large burden on staff. .

Further, in this invention, the running speed of the car is not reduced, but the running of the car itself is stopped and stopped, so that the power saving effect can be reliably increased.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing one embodiment of an elevator control device according to the present invention, and FIG.
FIG. 3 is a block circuit diagram of the state calculating device shown in the figure, FIG. 3 is a block circuit diagram of the determining device, and FIG. 4 is a block circuit diagram of the car number setting device. 1... Hall call signal, 2... Power consumption measurement signal,
3... Correctable signal, 4... Time zone signal, 5... State calculation device, 5a... Power consumption signal, 6... Determination device,
6c... Optimum number of idle cars signal, 7... Number of idle cars setting device, 7a... Number of idle cars signal, 7b... Number of idle cars designation signal, 8... Dormant car selection device, 8A
~8E...Selection signal for units 1 to 5, 9A to 9E
...Same car control device on the left. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of Claims] 1. In an apparatus that performs power-saving operation by suspending some of a plurality of cars and operating other cars, (a) an operation in which the cars are being operated; Temporary suspension in which the number of idle cars is temporarily set during a predetermined time period within the period to be greater than the number of idle cars during the time period corresponding to the above-mentioned predetermined time period during the operation period prior to the current operation period. means for setting the number of idle cars; (b) power measuring means for measuring the amount of power consumed by operating the above-mentioned cars other than the idle cars temporarily set by the temporarily idle car number setting means; (c) A service status measuring means for measuring at least one of the waiting time for a hall call, the passenger boarding time to the destination floor, and the occurrence of a change in the forecast of a car responding to a hall call during the predetermined time period, and outputting the result as a service status value. (d) The above-mentioned power consumption amount and service status value by these measuring means are input, and the power consumption amount measured by the above-mentioned power measuring means for the current operation period and the above-mentioned power consumption amount measured for the previous operation period. If the above-mentioned current power consumption is smaller and the above-mentioned service status value is within the predetermined allowable range, the temporarily set number of idle cars will be set as the number of idle cars in subsequent operations. An elevator control device comprising: determination means for outputting as follows.