JP4836288B2 - Elevator group management system - Google Patents

Description

  The present invention relates to an elevator group management system that performs group management control of a plurality of elevators, and more particularly to an elevator group management system that controls power consumption by controlling the number of operating units according to service conditions.

  For example, in a building having a large number of elevators such as an office building, it is necessary to install a plurality of elevators. However, since the number of installed elevators is usually determined based on traffic demand during the daytime, when the traffic demand is low, such as at night, an excessive service state occurs and wasteful power is consumed.

Therefore, conventionally, there is a system that suppresses power consumption of the entire system by cutting power supply to a predetermined number of dormant machines according to the current service status (see, for example, Patent Document 1).
JP 2004-83151 A

  However, a system that cuts the power supply to the stop machine and saves power as in Patent Document 1 has a problem that it cannot immediately respond when the service status changes. In other words, when the power of the stop unit is turned on after the traffic demand increases, it takes some time for the elevator to actually operate. The service to users will be reduced.

  The present invention has been made in view of such circumstances, and predicts the future service status in an elevator group management system that cuts off the power supply to any unit according to the service status and saves energy. By shutting down and restoring the power supply, the purpose is to reduce power consumption during quiet periods and to prevent service degradation for users.

An elevator group management system according to claim 1 of the present invention is an elevator group management system that performs group management control of a plurality of elevators. A hall call registered by operating a hall call button is stored in the plurality of elevators. The allocation control means to be allocated to the most suitable elevator, and the non-response time until each of the elevators responds to the hall call registration floor is measured by this allocation control means, and the average non-response time per unit time is calculated from the measurement result. The service status monitoring means to calculate, and the average non-response time calculated by the service status monitoring means are stored from a certain time to the current time, and an approximate expression representing the change status of the average non-response time is obtained, and future service status estimating means for estimating the average non-response time after a predetermined time based on the approximate expression, the future service If the average non-response time predicted by the service status prediction means is smaller than a predetermined threshold, it is determined that the number of units in operation is excessive with respect to demand, and a stop command is output. In contrast, a future service status determination unit that determines that the number of operating units is insufficient and outputs a return command, and a unit that shuts off the power supply from each of the elevators by a stop command output from the future service status determination unit. Select a stop control unit that outputs a power-off command to the unit, and a unit that returns power from the elevators according to a return command output from the future service status determination unit. A return control means for outputting a power return command, and a power recovery command output from the suspension control means and output from the power shutoff command or the return control means. Characterized by comprising a power supply control means for controlling power supply to each elevator in accordance with the instruction.

  According to such a configuration, the future average non-response time is predicted from the transition of the average non-response time up to the present time, and power control is performed according to the prediction. As a result, it is possible to always secure the required number of operating units from time to time and suppress power consumption without degrading service to users.

  According to a second aspect of the present invention, in the elevator group management system according to the first aspect, the future service status prediction means includes learning means for storing the average unanswered time for each day of the week and time as learning data. Characterized in that, based on the learning data stored in the learning means, the average non-response time after a certain time is predicted in consideration of the change status of the average non-response time in the same day of the week and the same time zone. To do.

  According to such a configuration, not only the transition state of the average non-response time on the current day but also the future average non-response time can be predicted more accurately by using the learning data of the same day of the week and the same time zone in the past. The average unresponse time can be predicted.

  According to a third aspect of the present invention, in the elevator group management system according to the first aspect, when the suspension control means receives a suspension instruction from the future service status determination means, the suspension control means The machine that has been in the non-directional stop state for the longest time is selected as the power-off target.

  According to such a configuration, by selecting the longest non-directional stop state of each elevator as a power-off target, power consumption is suppressed by power-off control without degrading service to the user. Driving can be carried out.

  According to a fourth aspect of the present invention, in the elevator group management system according to the third aspect, the stop control means is configured such that the unit selected as the power-off target is in a non-directional stop state for a predetermined time or more. When it has elapsed, it outputs a power shutdown command to the power control means so as to shut off the power of the unit, and the unit selected as the power cutoff target becomes a non-directional stop state and a predetermined time or more has passed. If not, an allocation restriction command is output to the allocation control means so as to limit the hall call allocation of the relevant unit.

  According to such a configuration, the power supply of a machine that has been in a non-directional stop state for a predetermined time or longer is shut off, and when the non-directional stop state has not been exceeded for a predetermined time or longer, By restricting call allocation, it is possible to prevent inadvertently shutting down the power supply and to forcibly create units that are subject to power shutdown by reducing the number of elevators that are actually in service due to allocation restrictions. it can.

  According to a fifth aspect of the present invention, in the elevator group management system according to the first aspect, the elevator group management system further comprises switch means for setting a power saving operation mode, and the stop control means and the return control means are the switch means. When the power-saving operation mode is set, the power-off command or the power-return command is output according to the determination result of the future service status determination means.

  According to such a configuration, by setting the power saving operation mode by the switch operation, it is possible to perform the power consumption suppression operation by the power shutoff control.

  According to a sixth aspect of the present invention, in the elevator group management system according to the first aspect, the suspension control means and the return control means are determined by the future service status determination means only in a preset time zone. According to the result, a power shutdown command or a power recovery command is output.

  According to such a configuration, it is possible to perform the power consumption suppression operation by the power-off control only in the time zone such as nighttime.

  According to a seventh aspect of the present invention, in the elevator group management system according to the first aspect of the present invention, the elevator group management system further includes time setting means for setting a power recovery time, and the return control means is set by the time setting means. When the time comes, the power supply return command is output to all the power shut-off machines regardless of whether or not there is a return command from the future service status determination means.

  According to such a configuration, at the time of an event or when an important customer visits, all the units can be returned to a serviceable state, and operation that places importance on service to the user can be performed.

  According to claim 8 of the present invention, in the elevator group management system according to claim 1, the future service status determination means has at least two thresholds for determination criteria, and the future service status prediction means According to a comparison result between the predicted average non-response time and each of the above threshold values, the number of units to be output as a stop command or a return command is determined.

  According to such a configuration, it is possible to output a stop command or a return command for a plurality of units at a time using a plurality of threshold values, so that even when the service situation is predicted to change suddenly, the user It is possible to suppress power consumption by power cutoff control without degrading the service to the service.

  According to a ninth aspect of the present invention, in the elevator group management system according to the first aspect, when the hall control is generated, the allocation control means is operating when the machine whose power is being restored by the return control means. If it is possible to respond earlier than the No. machine, the hall call is assigned to the No. machine that is returning to the power source.

  According to such a configuration, when a hall call is generated, efficient allocation control can be performed including the unit whose power is being restored.

  According to the present invention, in an elevator group management system that cuts off the power supply to any unit according to the service status and saves energy, by predicting the future service status and shutting off and returning power, It is possible to reduce power consumption during quiet periods and to prevent service degradation for users.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing the configuration of an elevator group management system according to the first embodiment of the present invention. In the figure, a to g indicate commands output from each unit, a is a pause command, b is a return command, c is a power shutoff command, d is a power supply return command, e is an allocation limit command, f is Restriction release command, g is an allocation command.

  The elevator group management system in the present embodiment includes a group management control device 11, unit control devices 12a, 12b, power control devices 13a, 13b, elevator cars 14a, 14b, and hall call buttons. 15 and an energy saving switch 16.

  The group management control device 11 performs group management control of a plurality of elevators. The single control devices 12a, 12b,... Control the operation of each elevator in accordance with instructions from the group management control device 11. The power control devices 13a, 13b... Control power supply to the single control devices 12a, 12b. In addition, the dotted line in a figure has shown the electric power line, and the power supply control devices 13a, 13b ... are connected with the power supply device which is not shown in figure.

  The elevator cars 14a, 14b... Of each elevator move up and down between the floors in the hoistway under the control of the corresponding single control devices 12a, 12b.

  The hall call button 15 is an operation button that is installed in an elevator hall (hall), and a user waiting there registers an elevator call. Although only one hall call button 15 is shown here, it is actually installed at each hall landing.

  The energy-saving switch 16 is an operating means that is installed in a building manager room or the like and sets a power consumption suppression operation mode by power-off control.

  In the group management control device 11, a unit status storage unit 21, an allocation control unit 22, a service status monitoring unit 23, a future service status prediction unit 24, a future service status determination unit 25, and an operation control unit 26 are provided. For example, it is implemented by software in a computer.

  The unit state storage unit 21 stores the state of each unit. In addition, "each unit" said here is the elevator cars 14a, 14b ... of each elevator. That is, in the state machine storage unit 21, in addition to the current position of the cars 14a, 14b, etc., a state indicating whether the car is running in response to a hall call or is waiting for a call, etc. Information is stored.

  The allocation control unit 22 performs allocation control of hall calls registered by operating the hall call button 15.

  The service status monitoring unit 23 measures the non-response time until each unit responds to the hall call registration floor by the allocation control unit 22, and calculates the average non-response time (waiting time) per unit time from the measurement result. To do. The future service status prediction unit 24 stores the average non-response time obtained by the service status monitoring unit 23 from a certain time before to the current time, and the average non-response time after a certain time from the change status of the average non-response time. Predict. The future service status determination unit 25 outputs the suspension command a or the return command b to the operation control unit 26 according to the average non-response time predicted by the future service status prediction unit 24.

  The operation control unit 26 includes a suspension control unit 27 and a return control unit 28. The suspension control unit 27 selects a car that shuts off the power from among the elevators based on the sleep command a output from the future service status determination unit 25, and outputs a power-off command c to the car. The return control unit 28 selects a car whose power is to be restored from each elevator according to the return command b output from the future service status determination unit 25, and outputs a power supply return command to the car.

  In such a configuration, when a hall call is registered by operating the hall call button 15 installed at the landing on each floor, the allocation control unit 22 responds to the hall call for all elevators currently in operation. An evaluation value is calculated, and an allocation command g is output to the machine with the best evaluation. Note that, as the evaluation value, for example, the time required until each elevator can answer a call, the full capacity probability in the hall at the hall call occurrence floor when the call is answered, and the like are used.

  For the hall call registered on each floor, the service status monitoring unit 23 until the elevator (car) actually allocated after the call is registered arrives at the floor and the call is deleted. Is measured as an unanswered time. Further, the service status monitoring unit 23 calculates the average non-response time by averaging the non-response time of each unit every predetermined unit time, and outputs it to the future service status prediction unit 24.

  The future service status prediction unit 24 first stores the average non-response time calculated by the service status monitoring unit 23 for the past N times, and calculates an approximate expression of the transition status of the average non-response time based on the data. . Then, the average non-response time after a predetermined time is predicted using the approximate function, and is output to the future service status determination unit 25.

  Here, a method of predicting the average non-response time after a predetermined time using an approximate function will be described with reference to FIG.

  FIG. 2 is a diagram showing the relationship between the change in average non-response time and the approximate function, where the x-axis represents elapsed time (minutes) and the y-axis represents average non-response time (seconds). In this example, the average non-response time is calculated every 5 minutes, and the approximate function is obtained by the least square method using the seven average non-response times calculated in the past 30 minutes.

  For example, assuming that the average unresponse time for the past seven times has changed as shown in the seven plot points in the figure, a function that is first-order approximated using the least squares method is expressed by the following equation: The

y = 0.0279x + 4.93063 (1)
The above (1), it is the obtaining the predicted mean unanswered time after 5 minutes from the present (a _{t 1), t 1 = 0.0279} × 5 + 4.9036 ≒ 5.04 ( s).

  Although the approximation function is obtained by a linear expression here, approximation may be performed by a polynomial according to the number of data used for the approximation. Alternatively, the approximate function may be obtained by a method other than the method of least squares.

The future service status determination unit 25 outputs the pause command a to the pause control unit 27 or the return command b to the return control unit 28 according to the predicted average non-response time t ₁ output from the future service status prediction unit 24. I do.

Specifically, as shown in FIG. 2, if the threshold is set to 5.0 seconds, when the predicted mean non response time t ₁ is less than 5.0 seconds, the operation number relative to demand Since it can be determined that the number is excessive, a pause command a is output to the pause control unit 27. On the contrary, when the predicted average non-response time t ₁ is 5.0 seconds or more, it can be determined that the number of operating units is insufficient with respect to the demand, so the return command b is output to the return control unit 28. .

  Next, the procedure until the power source of the single control devices 12a, 12b.

  FIG. 3 is a flowchart showing the processing operation of the suspension control unit 27 provided in the group management control device 11. The processing shown in this flowchart is stored in a memory (not shown) in the form of program code.

  The suspension control unit 27 first determines whether or not the energy saving switch 16 is ON (step S11). If the energy saving switch 16 is OFF (NO in step S11), nothing is done and all the units are in an operating state as usual, and the operation service is performed.

  On the other hand, if the energy saving switch 16 is ON (YES in step S11), the following processing is executed.

That is, the suspension control unit 27 determines whether or not a suspension command a is received from the future service status determination unit 25 (step S12). As mentioned above, pause command a, it is determined that the predicted mean non response time t ₁ calculated in future service status prediction unit 24 is a smaller than the threshold value, is excessive production number with respect to the demand Is output when

  If the stop command a has been received (YES in step S12), the stop control unit 27 refers to the unit state storage unit 21 and determines whether there is a non-directional stop state of each unit currently operating. It is determined whether or not (step S13). In addition, “the machine in the non-directional stop state” means an elevator (car) waiting in a call waiting state.

  If there is a non-directional stopped state machine (YES in step S13), the pause control unit 27 selects the longest non-directional stopped state machine among them as a power-off target (step S14). If there is only one non-directional stopped machine, it will be selected as an object to be paused.

  Next, the suspension control unit 27 determines whether or not a predetermined time or more (for example, 1 minute or more) has elapsed since the unit selected as the power-off target has entered a non-directional stop state (step S15). If the predetermined time or more has elapsed (YES in step S15), the suspension control unit 27 outputs a power shut-off command c to the power control device corresponding to the relevant car among the power control devices 13a, 13b. Step S16). As a result, power supply to the single control device of the relevant machine is cut off.

  On the other hand, in step S15, when the predetermined time has not elapsed since the unit selected as the power-off target is in the non-directional stop state, the suspension control unit 27 instructs the allocation control unit 22 to An assignment restriction command e for restricting the assignment of hall calls to the unit is output (step S17). Thereby, the allocation control unit 22 performs control so that the hall calls are not allocated as much as possible by weighting the allocation limit machines when the hall calls are registered.

  As described above, the suspension control unit 27 repeats the above process every second, for example, so that appropriate suspension control according to the determinations of the energy saving switch 16 and the future service status determination unit 25 can be performed.

  In Steps S15 and S16, the reason for shutting off the power when a predetermined time or more (for example, 1 minute or more) has elapsed since the non-directional stop state has been reached is that the machine has been in the non-directional stop state for a predetermined time or more. This is because the stop command a is calculated in a state where this unit is not operating, and it can be determined that the number of operating units is excessive with respect to demand.

  Furthermore, it is because it can prevent that the interruption | blocking of a power supply and a return | restoration generate | occur | produce continuously by performing power supply interruption | blocking only when there exists a unit which has been in a non-directional stop state more than predetermined time.

  In addition, by shutting off the power of only the unit that is in the non-directional stop state for a predetermined time or longer, it is possible to prevent a user from being trapped in the car.

  In addition, the number of elevators that actually perform service is reduced due to the allocation restriction, the non-directional stop unit is forcibly created, and when the stop command a is output again at the next service status determination, If the stop time exceeds a predetermined time (1 minute), the power shutoff command c can be output to the relevant machine.

  Next, the power recovery procedure will be described.

  FIG. 4 is a flowchart showing the processing operation of the return control unit 28 provided in the group management control device 11. The processing shown in this flowchart is stored in a memory (not shown) in the form of program code.

The return control unit 28 first determines whether or not the energy saving switch 16 is ON (step S21). If the energy saving switch 16 is OFF (NO in step S 21), recovery control section 28, all units of the power control device 13a, and outputs the power supply recovery command d respect 13b ... (step S22). As a result, all the units are in operation and the driving service is performed.

  On the other hand, if the energy saving switch 16 is ON (YES in step S21), the following processing is executed.

That is, the return control unit 28 determines whether or not the return command b is received from the future service status determination unit 25 (step S23). As described above, return command b is outputted when the predicted mean unacknowledged time t ₁ calculated in future service status prediction unit 24 is not lower than a threshold value is determined running number is insufficient The

  If the return command b has been received (YES in step S23), the return control unit 28 determines the presence / absence of an allocation-restricted unit (units to which allocation is restricted) through the allocation control unit 22 (step S24). If there is an allocation restricted number machine (YES in step S24), the return control unit 28 outputs a restriction release command f for releasing the allocation restriction of the number machine to the assignment control unit 22 (step S25).

  If there is no quota-limited number of machines (NO in step S24), the return control unit 28 determines whether or not there is a machine whose power is cut off through the power supply control devices 13a, 13b, ... (step S26). If there is a corresponding number (YES in step S26), the return control unit 28 selects the number and outputs a power return command d to the power control device of the number (step S27).

  Similarly to the suspension control unit 27, the return control unit 28 performs appropriate return control according to the determination results of the energy saving switch 16 and the future service status determination unit 25 by repeating the above processing every second. Can do.

  The power control devices 13a, 13b... Supply power to the single control devices 12a, 12b... That they are in charge of in response to the power cutoff command c from the suspension control unit 27 or the power return command d from the return control unit 28. Turn ON / OFF.

  Thus, according to the elevator group management system in the first embodiment, the power supply to each unit is based on the future non-response time predicted from the transition of the non-response time from a certain past to the present. By controlling this, it is possible to always prepare the number of operating units corresponding to the demand at that time.

  Therefore, as in the case where the power supply is controlled based on the current non-response time and the service status, the power supply is temporarily turned on after the power supply to the power shutdown unit is turned on. In addition, the number of operating units with respect to demand decreases, and it becomes possible to efficiently suppress power consumption without deteriorating the service to users.

  In the first embodiment, the power is shut off according to the state of the energy saving switch 16 and the determination result of the future service status determination unit 25. However, when actually operating, the energy saving switch 16 is installed. Instead, the determination may be made only by the determination result in the future service status determination unit 25.

  Furthermore, instead of the energy saving switch 16, for example, “23: 00 to 7:00” or the like may be configured to perform the power consumption suppression operation by turning off the power only in a preset time zone. In this case, in the suspension control unit 27 and the return control unit 28, the power-off command c or the power-return command d is issued according to the determination result of the future service status determination unit 25 only in the time zone set for the power consumption suppression operation. Will be output.

  Further, in the future service status prediction unit 24, a learning unit 24a for storing the average unanswered time for each day of the week and time zone as learning data is provided, and not only the change status of the average unanswered time of the day, Based on the learning data stored in 24a, the average non-response time after a certain time may be predicted in consideration of the change state of the average non-response time in the same day of the week and the same time period.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  In the first embodiment, the power-off control is performed when the suspension control unit 27 receives the return command b from the future service status determination unit 25. However, in the second embodiment, the return command b is changed to the return command b. Regardless of this, when a preset time is reached, power return control is performed for all power shut-off machines.

  FIG. 5 is a block diagram showing the configuration of an elevator group management system according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as the structure of FIG. 1 in the said 1st Embodiment, and the description shall be abbreviate | omitted.

  The difference from the configuration of FIG. 1 in the first embodiment is that the operation control unit 26 includes a time setting unit 29. The time setting unit 29 is for setting the time for power recovery, and has keys and buttons for inputting time data.

  For example, in the morning work hours, it is preferable that all units be in the service state regardless of the determination result of the future service status determination unit 25. In such a case, when the return time is set in the return control unit 28 through the time setting unit 29, the return control unit 28 sets the specified return time regardless of the determination result of the future service status determination unit 25. When it becomes, the power supply return command d is output to all the power shut-off machines.

  Thus, for example, if the return time is set to 8:00, even if the return command b is not output from the future service status determination unit 25, all the units can be serviced at 8:00. Thereafter, similarly to the first embodiment, control according to the determination result of the future service status determination unit 25 is performed.

  As described above, according to the elevator group management system of the second embodiment, it is possible to arbitrarily set a time when priority is given to the service to the user rather than the suppression of power consumption. At this time, regardless of the output of the future service status determination unit 25, all units can be returned to a serviceable state.

(Third embodiment)
Next, a third embodiment of the present invention will be described.

  In the first embodiment, the return number is not particularly limited when the return control is performed according to the determination result of the future service status determination unit 25, but in the third embodiment, two threshold values are used. Thus, the return control is performed by deciding the number of returns in stages.

  Since the system configuration is the same as that in FIG. 1 in the first embodiment, only the process of the future service status determination unit 25 will be described here with reference to FIG.

  FIG. 6 is a diagram showing the relationship between the change in the average non-response time and the approximate function in the third embodiment, where the x-axis represents the elapsed time (minutes) and the y-axis represents the average non-response time (seconds). . Similar to FIG. 2, the average non-response time is calculated every 5 minutes, and the approximate function is obtained by the least square method using the seven average non-response times calculated in the past 30 minutes.

Here, in the third embodiment, the future service status determination unit 25 is set with two values, a first threshold value (5.0 seconds) and a second threshold value (5.2 seconds) as shown in FIG. It is, by comparing the predicted mean non response time t ₁ which is output from the future service status prediction unit 24 and the first and second threshold, performing the output of the three patterns as follows.

T ₁ <first threshold: The return command b is not output.
First threshold value ≦ t ₁ <second threshold value: A return command b is output with the number of return units being one.
T ₁ ≧ 2nd threshold value: A return command b is output with the number of return units set to two.

  For example, assuming that the average unresponse time for the past seven times has changed as shown in the seven plot points in the figure, a function that is quadratic approximated using the least squares method is expressed by the following equation: Is done.

y = 0.014x ² + 0.0829x + 4.8357 (2)
When the predicted average non-response time t ₁ after 5 minutes from the present time is obtained by the above equation (2), t ₁ = 0.0014 × 5 ² + 0.0829 × 5 + 4.8357≈5.29 (seconds).

Therefore, if the first threshold value is set to 5.0 (seconds) and the second threshold value is set to 5.2 (seconds), the future service status determination unit 25 may satisfy the condition of t ₁ ≧ second threshold value. A return command b with two return units is output.

Although the return determination has been described here, the same applies to the suspension determination. That is, for example, the first threshold value is set to 5.0 seconds and the third threshold value is set to 4.7 seconds, and by comparison with the predicted average non-response time t ₁ output from the future service status prediction unit 24, A pause command a to a plurality of units is output as follows.

T ₁ <third threshold value: A pause command “a” is output with the number of pauses set to two.

Third threshold ≦ t ₁ <first threshold: A pause command a with the number of pauses as one is output.
T ₁ ≧ first threshold value: The pause command a is not output.

  Also, a larger number of threshold values for return determination / pause determination may be prepared, and the number of return / pause decisions may be determined more finely.

  As described above, according to the elevator group management system of the third embodiment, a plurality of threshold values for determination of return / restoration are set, and a stop command a / return command b for a plurality of vehicles according to the service status. Can respond to a sudden change in the service status.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described.

  In the fourth embodiment, when the hall control is assigned by the assignment control unit 22, the returning car (car) is included.

  Since the system configuration is the same as that of FIG. 1 in the first embodiment, only the processing of the allocation control unit 22 will be described here using FIG.

  FIG. 7 is a flowchart showing the processing operation of the assignment control unit 22 provided in the group management control apparatus 11 in the fourth embodiment. The processing shown in this flowchart is stored in a memory (not shown) in the form of program code.

  In the machine state storage unit 21, whether the power supply is being shut down according to the power shutdown command c output from the suspension control unit 27 and the power recovery command d output from the recovery control unit 28 as the status information of each unit. Information indicating whether it is returning is stored.

  Now, it is assumed that a new hall call is generated as the hall call button 15 is operated. First, the allocation control unit 22 refers to the unit status storage unit 21 and calculates an evaluation value when the hall call is allocated for all operating units according to a predetermined evaluation formula (step S31). The machine with the best evaluation value is temporarily allocated (step S32).

  Next, the allocation control unit 22 refers to the unit state storage unit 21 again and determines whether there is a unit that is returning (step S33). The “returning car” refers to an elevator that is currently activated after power is restored by the power restoration command d output from the restoration control unit 28.

  If there is no returning machine (YES in step S33), the assignment control unit 22 determines the temporary assigned car as an assigned car as usual (step S38), and the unit control devices 12a, 12b. The allocation command g is output to the corresponding single control device (step S39).

  On the other hand, when there is a returning unit (YES in step S33), the allocation control unit 22 responds to the time T1 required for the returning unit to respond to the hall call, and the temporarily allocated unit responds to the hall call. Is compared with the time T2 required for the process (step S34). In this case, the T1 is obtained as follows.

T1 = Ti + Tm (3)
Ti is the time it takes for the returning unit to complete startup, and Tm is the time it takes to move to the hall call generation floor after startup completion.

  Here, if T1 <T2, that is, if the returning machine can respond faster than the temporarily assigned car (YES in step S34), the assignment control unit 22 temporarily assigns the restored car. It is set as the number machine (step S35).

  Then, the allocation control unit 22 holds the hall call allocation until the activation of the relevant unit is completed (steps S36 and S37), and when the activation is completed and the response becomes possible (in step S36). YES), it is determined as an assigned machine (step S38), and an assignment command g is output to the corresponding single control device among the single control devices 12a, 12b... (Step S39).

  As described above, according to the elevator group management system of the fourth embodiment, when there is a returning car in the hall call assignment, it is possible to perform the assignment control in consideration of the car.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various forms can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

FIG. 1 is a block diagram showing the configuration of an elevator group management system according to the first embodiment of the present invention. FIG. 2 is a diagram showing a relationship between a change in average non-response time and an approximate function in the same embodiment. FIG. 3 is a flowchart showing the processing operation of the suspension control unit provided in the group management control apparatus according to the embodiment. FIG. 4 is a flowchart showing the processing operation of the return control unit provided in the group management control apparatus in the same embodiment. FIG. 5 is a block diagram showing the configuration of an elevator group management system according to the second embodiment of the present invention. FIG. 6 is a diagram showing a relationship between a change in average non-response time and an approximate function in the third embodiment of the present invention. FIG. 7 is a flowchart showing the processing operation of the allocation control unit provided in the group management control apparatus according to the fourth embodiment of the present invention.

  DESCRIPTION OF SYMBOLS 11 ... Group management control apparatus, 12a, 12b ... Single-unit control apparatus, 13a, 13b ... Power supply control apparatus, 14 ... Car, 15 ... Hall call button, 16 ... Energy saving switch, 21 ... Unit state memory part, 22 ... Assignment control , 23 ... Service status monitoring unit, 24 ... Future service status prediction unit, 24 a ... Learning unit, 25 ... Future service status determination unit, 26 ... Operation control unit, 27 ... Suspension control unit, 28 ... Return control unit, 29 ... Time setting unit, a ... pause command, b ... return command, c ... power supply cutoff command, d ... power supply return command, e ... allocation limit command, f ... limit release command, g ... allocation command.

Claims (9)

In the elevator group management system for group management control of multiple elevators,
An allocation control means for allocating a hall call registered by operating a hall call button to an optimum elevator among the plurality of elevators;
Service status monitoring means for measuring the non-response time until each elevator responds to the hall call registration floor by this allocation control means, and calculating the average non-response time per unit time from the measurement result;
The average non-response time calculated by the service status monitoring means is stored from a certain time to the current time , an approximate expression representing the change state of the average non-response time is obtained, and the fixed time is determined based on the above approximate expression. Future service status prediction means for predicting the average unanswered time later,
When the average non-response time predicted by the future service status prediction means is smaller than a predetermined threshold, it is determined that the number of operating units is excessive with respect to demand, and a suspension command is output. Future service status determination means for determining that the number of operating units is insufficient with respect to demand and outputting a return command;
A stop control means for selecting a unit that shuts off the power from among the elevators according to the stop command output from the future service status determination unit, and that outputs a power-off command to the unit;
A return control means for selecting a car that returns power from the elevators by a return command output from the future service status determination means, and outputting a power return command to the car;
Elevator group management comprising: power supply control means for controlling power supply to each of the elevators in response to a power cut-off command output from the pause control means or a power supply return command output from the return control means system. The above future service status prediction means is
It has a learning means for storing the average unanswered time for each day of the week and time as learning data, and based on the learning data stored in the learning means, the change status of the average unanswered time for the same same day in the past and the same time zone The elevator group management system according to claim 1, wherein an average non-response time after a predetermined time is predicted in consideration of the above. The pause control means includes
The elevator of claim 1, wherein when a stop command is received from the future service status determination means, the longest non-directional stop state among the elevators is selected as a power-off target. Group management system. The pause control means includes
When the unit selected as the power-off target is in a non-directional stop state and a predetermined time has elapsed, a power-off command is output to the power control means so as to cut off the power of the unit, and the power source When a unit selected as a shutoff target has been in a non-directional stop state and has not exceeded a predetermined time, an allocation restriction command should be output to the above allocation control means so as to limit the allocation of hall calls for that unit. The elevator group management system according to claim 3. A switch means for setting the power saving operation mode is provided.
The pause control means and the return control means are:
2. The elevator according to claim 1, wherein when the power saving operation mode is set by the switch unit, a power-off command or a power-return command is output according to a determination result of the future service status determination unit. Group management system. The pause control means and the return control means are:
2. The elevator group management system according to claim 1, wherein a power-off command or a power-return command is output only in a preset time period according to the determination result of the future service status determination means. A time setting means for setting the power recovery time,
The return control means includes
2. When the time set by the time setting means is reached, a power return command is output to all power shut-off machines regardless of whether or not there is a return command from the future service status determination means. The elevator group management system described. The future service status determination means is
According to the comparison result between the average non-response time predicted by the future service status prediction means and each of the above thresholds, there is at least two thresholds for determination criteria. 2. The elevator group management system according to claim 1, wherein the number is determined. The allocation control means is
When a hall call is generated, if the unit whose power is being restored can respond faster than the operating unit by the return control means, the hall call is assigned to the unit whose power is being restored. The elevator group management system according to claim 1.

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