JPS6225588B2 - - Google Patents

Description

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

Conventionally, in order to reduce the power consumption of elevators, for example, the speed of the car was reduced to a rated speed of 240 m/min.
Energy-saving operation has been proposed by reducing the speed to 150 m/min. The power saving effect of this operation does not increase as the speed is lowered, but it depends on the traffic situation in the building (therefore, the car load, travel distance, etc. will change), acceleration/deceleration, maximum speed, model, etc. It has been found that the effects differ depending on the power saving parameters that affect so-called power saving. For example, in traffic conditions where most of the driving is short distances, such as driving on the first floor or the second floor, and driving at the set maximum speed is rare, even if the rated speed is lowered, the consumption will be reduced. There is not much effect on power saving.

Therefore, the effectiveness cannot be improved unless the number of cars that should be operated in energy-saving manner is determined based on a careful assessment of the traffic conditions in the building, and it is a time-consuming task to have the staff set the optimal value for the number of cars. This will impose a burden on you.

On the other hand, by lowering the speed (maximum speed, acceleration/deceleration, etc.), the time required to arrive at the scheduled floor increases accordingly. There may be cases in which the influence on the service status value, which indicates the quality of the service to passengers, such as the time required to reach the passenger car or the time required to wait for the car at the landing, cannot be ignored. Therefore, conventionally, cars are operated at a reduced speed only during times when the impact on passenger services 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 power-saving operation by changing the speed described above 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, it has been proposed to change the number of cars in operation (the number of cars that reduce speed) depending on the time of day to maintain a certain level of service to passengers. . In this case, it is desirable to select a speed 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.

The purpose of this invention is to improve the above-mentioned problems, and to provide an elevator control device that allows the number of cars to be set to maximize the power saving effect without imposing the burden on staff etc. to reset the settings. do.

Another object of the present invention is to enable the setting of the number of cars that can enhance the power saving effect without significantly sacrificing waiting time.

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

In the example, the power saving parameters are the speed and the number of cars, and the service status value is the average waiting time.The number of cars operated at a lower speed than usual is increased or decreased, and the amount of power for each number is calculated. The number of vehicles that should be operated at low speed is determined in relation to the average waiting time.

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 switch to reset the optimum number of cars (not shown)
4 is a time period signal that becomes "H" at a predetermined time every day, and 5 is a state in which the power consumption and average waiting time are calculated within a predetermined time period. The calculation device 5a is a power consumption signal, 5b is an average waiting time signal, and 6 is a temporary car number signal 7a, which will be shown later. a determination device that determines whether or not it is optimal;
6a is an initial reset signal, 6b is a modification interrupt signal,
6c is an optimum car number signal, 7 is a car number setting device that sets the number of cars according to a predetermined time period and a correctable period, 7a is a temporary car number signal, 7b is a car number designation signal, and 8 is a car number setting device that sets the number of cars according to a specified time period and a correctable period. Depending on the machine No. 1~
A car selection device selects the car to be operated at a reduced speed from among the cars of No. 4 and generates selection signals 8A to 8D. 9A selects the car of No. 1 to be operated at a predetermined car speed lower than the rated speed. The operating car control devices 9B to 9D are car control devices that also operate the cars No. 2 to No. 4.

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 increments the content (time) by 1 every second when the input I is "H", and holds the content as it is when the input I becomes "L"; 13 is the content when the input R is "H" When input I changes from "L" to "H" after resetting to zero, the contents (number of pulses)
14 and 15 are adders; 16 is a divider that divides input X by input Y;
17 is an AND gate; 18 is a pulse generator that emits one pulse signal when the input changes from "L" to "H"; 19 to 21 store input I as is when input G is "H"; A storage device retains its stored contents even if the input G becomes "L", and 22 is a subtracter that subtracts the input Y from the 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 holds the memory contents at other times; is a subtractor that subtracts input Y from input X, 33 and 34 are comparators whose output is "H" when input X≧input Y, and "L" otherwise
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 input X≧input Y and "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 car number designation signal 7b becomes zero, and the car selection device 8 in FIG. 1 operates accordingly, and the selection signal 8
A to 8D are "L". Therefore, car control devices 9A to 9D do not operate, and the speed of all cars is 240 m/min.
is operated at the rated speed of

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 optimum car number signal 6c (one car is set to the value already stored as the temporary car speed signal 7a) stored in is selected, and the car number designation signal 7b is set to 1.
The car selection device 8 selects one car in a predetermined order (car No. 1 → car No. 2 → car No. 3 → car No. 4), and the selection signal 8A is "H", and the other selection signal 8B ~8D becomes "L".
Therefore, only Unit 1 is operated at a predetermined maximum speed of 150 m/min.

If the traffic situation in the building changes and the staff determines that it is necessary to reset the optimal number of cars, and closes the reset switch at a time outside of the designated time slot, the modifiable signal 3 becomes "H". The output of NOT gate 37 becomes "L". The pulse generator 25 in FIG. 3 emits a pulse, and the initial reset signal 6a becomes "H". A constant value signal 26 is stored in the storage device 30, and the optimum car number signal 6c is in the zero range. on the other hand,
A constant value signal 27 is stored in the storage device 31, and its output is 1000KWH. Further, when the initial reset signal 6a in FIG. 4 becomes "H", the content of the pulse counter 45 becomes 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". Further, since the time zone signal 4 is "L", the output of the AND gate 56 is also "L", and the output of the NOT gate 54 is "H". Therefore, the constant value signal 49 is selected by the selection circuit 59, and the speed of the cars whose speed is reduced is in the zero range, that is, the rated speed of all the cars is 240 m/mi.
It is driven by n.

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,
1st floor upward direction calculation circuit 1Au time counter 12
and the contents of pulse counter 13 are both reset to zero. Arithmetic circuits on other floors 2Au~5Au, 6Ad~
The same applies to 2Ad. Therefore, the outputs of adders 14 and 15 are both zero, and the outputs of divider 16
The output also becomes zero, zero is stored in the storage device 21, and the average waiting time signal 5b becomes 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 output of the subtractor 58 is selected by the selection circuit 59, the car speed designation signal 7b becomes zero level, and all the cars are operated at the rated speed as the first step of resetting the optimum speed. Become.

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 17 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 to 5Au and 6Ad to 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 adds up 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". If the power consumption signal 5a is 25KWH, the output of the storage device 31 is 100KWH, so
The output of the subtracter 32 is 1000−25=975KWH,
The output of the comparator 33 becomes "H". with this,
Since all the inputs of the AND gate 35 are "H", its output becomes "H". Therefore, in the storage device 30, the temporary car number signal 7a is stored, and the optimum car number signal 6c becomes zero. Further, the storage device 31 stores the power consumption signal 5a,
Its output will be 25KWH. The output of the subtracter 32 is 25-25=0, and the output of the comparator 33 is "L".
Therefore, 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 (on the second day) The car number signal 7a indicates one car, and the car number designation signal 7b also indicates one car. Therefore, the selection signal 8A of the car selection device 8 is "H", and the other selection signals 8B to 8D are "L".
Therefore, only Unit 1 will be operated at a speed of 150m/min. In this way, at a predetermined time every day, the contents of the pulse counter 45 are added one by one, the temporary car number signal 7a increases by one, and the car is operated at a speed of 150 m/min according to the number of cars. The car is selected and driven.

In the same way as described above, in FIG. 2, when the number of cars is one, 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, then the subtracter 32 in FIG. The output of is 25−23=
At 2KWH, the output of comparator 33 becomes "L",
The output of the AND gate 35 becomes "L". Therefore, even after the predetermined time period, the storage devices 30, 3
The contents of 1 do not change.

At the third time (two cars are running at 150m/min), the power consumption signal 5a is 21KWH, and the average waiting time signal 5 is 21KWH.
If b is 20 seconds, the subtracter 32 in FIG.
The output of the comparator 33 is 25-21=4KWH, and the output of the comparator 33 becomes "H". Therefore, after the predetermined time period has passed, the output of the AND gate 35 becomes "H", so the contents of the storage device 30 become two new units, and the contents of the storage device 31 become 21KW.

Similarly, when the fifth time (four cars operated at 150 m/min) is completed and the sixth time begins, the content of the pulse counter 45 in FIG. 4 becomes 6, which is equal to the constant value signal 46, so the comparison The output of the circuit 50 becomes "H", the output of the OR gate 51 also becomes "H", the memory 52 is set, and its output becomes "H". Now, the output of the AND gate 55 becomes "H", and the selection circuit 59 generates the optimum car number signal 6c stored in the storage device 30 of FIG. 3 as the car number designation signal 7b.

If, for example, the fourth time (number of cars is 3), the power consumption signal 5a changes before the end of the fifth time,
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 38 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 at a predetermined time period, the output of the AND gate 55 becomes "H".
The selection circuit 59 selects the optimal car number signal 6 stored in the storage device 30 of FIG. 3 by the end of the third time.
c is selected, and the car number designation signal 7b is generated as two cars.

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

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 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 four cars are installed in a six-story building, but the number of floors and the number of cars are not limited at all.

On the other hand, in a situation where there is a strong need to reduce power consumption and a slight decline in service is unavoidable, it is possible to This may be done automatically based on the actual measurement result of the electric energy.

That is, the AND gate 35 in FIG. 3 may be replaced with a gate with 3 input terminals that operates without any output from the comparator 34, or the comparator 34 always operates to output H (for example, the constant value signal 29 is not output for 30 seconds). By setting it to an extremely large value and always operating at H output, the number of cars in power-saving operation can be automatically set based only on the actual measurement results of power consumption.

At this time, good service for elevator users is slightly sacrificed, but the car only switches to low-speed operation and does not stop completely, so the service does not deteriorate significantly. Furthermore, when setting the number of power-saving operation cars to increase, a command is output only when there is a power-saving effect (that is, only when there is a power-saving effect greater than 3KWH as in the above example).
It is possible to prevent excessive service deterioration.

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 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 optimal number of cars was determined by (a) increasing the number of cars operating at a speed lower than the rated speed one by one starting from zero cars, and determining the optimal number based on the results; The number of cars to be tested is determined in such a way that the optimum number of cars can be selected even if the number of times the car is operated is small, or that a certain amount of power saving effect can be achieved even during the trial operation. Make sure to use efficient means.

(b) It was decided that each number of cars would be tested only once, but taking into account that there would be differences in power consumption and waiting time depending on traffic conditions, the test run would be repeated several times with the same number of cars. Repeat and judge based on the results. In this way, the optimal number can be determined very accurately.

(C) When comparing the power saving effects, the optimum number of units is not updated (in other words, the number of units is not operated beyond that) unless the difference is greater than a certain value (3KWH); This means that unless the power efficiency improves to some extent, we will not save electricity even if it means degrading passenger service. However, if the main consideration is power saving, the constant value signal 28
Set the value of .

(D) The number of vehicles in test operation was changed every day, but it should be changed every two to three days, or the number of vehicles could be changed to several types at the same time of the day.

(E) The average waiting time was used as the service status value for the passenger service status, but this can be calculated as the maximum waiting time,
Do you use long-waiting rate (rate of calls made to wait longer than a predetermined 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 cars will only worsen passenger service, so the test operation is stopped and the number of cars used up to that point is reduced. The number of cars with the lowest amount of electricity was selected as the optimal number, but after testing this until the end (lowering the speed of all machines), the number of cars whose passenger service became worse than the predetermined level was selected as the optimal number. Avoid choosing.

The optimal number of units is reset only 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 units.

In the car selection device 8, the optimum car number signal 6c
When the number of cars to be operated at a speed lower than the rated speed is specified, the cars are selected in a predetermined order (No. 1 → No. 2, etc.). Priority is given to selecting cars other than cars that have a large impact on passenger service, such as cars that are likely to have a long wait for calls or cars that have a large number of hall calls.

Furthermore, in the above embodiment, the power saving parameter values are the speed and the number of cars, and the service status value is the average waiting time, but both the power saving parameter and the average waiting time are not limited to the above.

As described above, the present invention provides an elevator control device that performs power-saving operation of an elevator by setting power-saving parameters that affect power-saving to predetermined values. The power consumption of the elevator is measured for each power parameter using a power measurement means, these measured power consumptions are compared by a determination means, and based on the results of this comparison, the parameters that provide a greater power saving effect are selected. Since this setting is made, it is possible to automatically set the best power consumption saving operation according to the traffic situation of the building, and it is possible to eliminate the need for staff to set the number of operating vehicles.

Furthermore, in this invention, the service status for elevator users is measured, and the number of cars in power-saving operation is set within a range that does not significantly deteriorate the service status, taking this service status into account. To automatically set the number of cars in power-saving operation without significantly degrading service and without placing a great burden on staff.

[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 car number signal, 7...
... Car number setting device, 7a... Temporary car number signal,
7b... Car number designation signal, 8... Car selection device, 8A to 8D... Car No. 1 to No. 4 selection signal,
9A to 9D...Same car control device on the left. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. The operating speed of the elevator and the number of operating elevators operated according to the operating speed, which affect the power consumption of a plurality of elevators, are parameters, and the values of these parameters are In a control device that performs power-saving operation of an elevator by changing: (a) a time period within the operation period in which the elevator is operated is specified in advance; (b) Test run means that temporarily sets parameter values to different values in sequence and commands power-saving operation using the temporarily set parameter values; (c) determining means for comparing the power consumption for each specified time period and determining the temporary parameter value that is the minimum power consumption as the subsequent regular parameter value; An elevator control device comprising: 2. A service status value represented by at least one of the waiting time for a hall call that occurs for a plurality of elevators, the boarding time for passengers to reach their destination floor, and the occurrence of a change in the forecast for a car that responds to a hall call; The operating speed of the elevator, which affects the power consumption, and the number of elevators operated according to the speed are used as parameters, and the elevator is operated so as to reduce the power consumption by changing the values of these parameters. In the control device to be operated, (a) operates during a specified time period to maintain the above parameter value at a temporary parameter value that reduces the above power consumption, and at times other than the specified time period, the above parameter value is maintained at a temporary parameter value that reduces the above power consumption; a setting means for setting a parameter to a previously determined predetermined value; (b) a power amount measuring means for measuring the power consumption in the specified time period; (c) a setting means for measuring the power consumption amount in the specified time period; (d) the power consumption and service state value by each of the measurement means are input, and it is determined whether or not the service state value is within a predetermined allowable range; If the service status value is within the allowable range and the power consumption is reduced, the power consumption at that time is determined. A determining means for setting the temporary parameter value as the regular parameter value for the specified time period; (e) means for operating the elevator according to the regular parameter value determined by the determining means. Elevator control device.