JPH11322235A - Elevator door controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator door controller which detects of ingress/egress of a passenger or loading/unloading of a load for automatic control of door closing operation. SOLUTION: A CPU 41 detects the load of a car after a door is opened and stores load data in a load data storage part 42. The CPU 41 reads a plurality of load data based on a control program preset in a program setting part 43 and computes a variation width ΔM in the load of the car from the data. When the variation width ΔM become a threshold value X or smaller preset in a threshold value setting part 44, the CPU 41 controls a door driving part 12 so that the door may be closed. The CPU 41 detects a load variation after the door is opened, and completion of ingress/egress of a passenger automatically for controlling the closing operation of the door, thus it is possible for a passenger to use the elevator comfortably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door control device for controlling opening and closing of an elevator door.

[0002]

2. Description of the Related Art An elevator is equipped with a car for carrying passengers and luggage, and the car is provided with a car door.

When the elevator car arrives at the destination floor, the door control device controls the car door to be opened, but in general, the open / close control is also performed in conjunction with the hold door.

That is, in the conventional elevator door control device, as shown in the control flowchart of FIG. 6, when the car arrives at the destination floor, the program starts,
First, door opening control is performed (ST61). Then, timer counting is started (ST62), and thereafter, it is determined whether or not a preset time has elapsed (ST63). If it is determined that the preset time has elapsed, door closing control is performed (ST64). Then, the timer is stopped (ST65), and the program ends.

[0005]

As described above, the conventional elevator door control device controls the door to be automatically closed by a timer after the landing door is opened. When the getting on / off operation was prolonged, it hit a door where passengers and luggage were closed, and it took extra time for the passengers to get on and off and to get their luggage in and out. In addition, in order to keep the door open at that time, the door open button of the car operation panel is kept pressed, which is complicated for the user.

On the other hand, if the getting on and off is completed in a short time, the door is kept open until the timer set time elapses. Therefore, urgent passengers need to operate the door closing button one by one. Yes, improvements were desired.

The present invention has been made to solve the above-mentioned conventional problems, and detects the end of elevator passengers getting on and off and the end of loading / unloading work, and performs control to automatically close the door. It is an object to provide an elevator door control device.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an elevator door control device according to the present invention provides a load for sequentially detecting a load of a car and outputting load data after an elevator door is opened. Measuring means, load data storing means for storing the load data output from the load measuring means, and a plurality of times the load data stored in the load data storing means is read out, and the fluctuation range of the car load is read from these data. Load fluctuation range calculation means for calculating, and a door opening / closing control means for controlling to close the door when a value of the fluctuation width calculated by the load fluctuation width calculation means is equal to or less than a predetermined threshold value. And

The elevator door control device according to the present invention focuses on the fact that the load value of the car is stabilized after the getting on and off, and the fluctuation range is obtained from a plurality of load data sequentially measured after the door is opened. Is calculated, and when the calculated value of the fluctuation range is equal to or smaller than a predetermined threshold value, it is determined that the getting on / off operation is completed and the door is closed. Accordingly, the door closing operation corresponding to the actual getting on / off time length is performed, so that it is possible to prevent the passenger from hitting the closing door or the door opening time from being unnecessarily prolonged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an elevator door control device according to the present invention will be described in detail with reference to FIGS.

FIG. 1 is a block diagram showing a first preferred embodiment of the device according to the present invention. A load detector 2 composed of a load sensor such as a strain gauge is mounted between the car room of the car 1 and the car frame, and the detected load analog signal of the car 1 is controlled via a tail cord 3 by an elevator control. It is supplied to a central processing unit (CPU) 41 composed of a microprocessor of a control unit 4 provided on the panel.

The CPU 41 of the control unit 4 samples the analog load signal transmitted in real time from the load detector 2 at an arbitrary time interval T and converts it into a digital signal corresponding to the load value of the car 1. The digital load data is sequentially supplied to and stored in a load data storage unit 42 composed of a RAM.

Accordingly, the CPU 41 constitutes load measuring means for outputting load data based on the signal from the load detector 2, and the load data is stored in the load data storing means.

The CPU 41 has a program setting section 4
3 and the threshold setting unit 44 are connected, and the CPU 41 first sets the load data stored multiple times in the load data storage unit 42 in the program setting unit 43 after the car 1 opens the landing floor on the destination floor. In accordance with the control program read out, the fluctuation range of the car load after the door is opened is sequentially calculated.

Next, the CPU 41 compares the value of the variation width calculated sequentially with a threshold value preset in the threshold value setting section 44, and when the value of the variation width becomes equal to or less than the threshold value, the car door 11 of the car 1 A control signal is supplied to the door drive unit 12 to close the door. Accordingly, the door drive unit 12 receives the control signal from the control unit 4, closes the car door 11, and in conjunction with this, the landing (hall) door 5 also closes.

The load on the car 1 after the landing door is opened greatly varies depending on the getting on / off of the passengers or loading / unloading of the luggage, but after the getting on / off and loading / unloading operations are completed, the load on the car 1 is stabilized.

Therefore, as in this embodiment, the car load data after the door is opened is sequentially read out, and when the fluctuation width falls below a certain threshold value, it is determined that the passenger getting on / off and loading / unloading work have been completed. It can be considered that the door can be closed in a timely manner.

A specific control operation in the control section 4 will be described with reference to a flowchart shown in FIG.

Now, the sampling period T in the CPU 41 is set to 1 second, and the number N of load data for calculating the fluctuation width is counted twice from the newer one stored in the load data storage unit 42 (N = 2). In addition, the threshold value X of the load variation width preset in the threshold value setting unit 44 is set to 5 (kg).
Set as

Therefore, as shown in FIG. 2, when the car 1 has landed, the controller 4 controls the doors to open (ST21), and the car load value that has been digitally converted sequentially at each sampling cycle T (1 second) is equal to the load. It is stored in the data storage unit 42 (ST2
2).

The CPU 41 reads the data of the load data stored in the load data storage unit 42 from the latest two times and calculates the difference, that is, the variation width ΔM (ST23).

Next, the CPU 41 determines that the variation width ΔM calculated in ST23 is equal to the threshold X set in the threshold setting unit 44 in advance.
(5 kg), it is determined whether or not the fluctuation width ΔM is equal to or smaller than the threshold X (5 kg) (ST24). When the fluctuation width ΔM is equal to or smaller than the threshold X (5 kg) (YES), the CPU 41
Supplies a control signal to the door drive unit 12 to close the door, and the door is closed (ST25).

If the variation width ΔM is equal to the threshold X in ST24,
If it is not (5 kg) or less (NO), it is determined that the passenger has not yet finished getting on and off, and ST
Returning to 23, the latest two data are read out from the load data supplied again at the next timing, and the fluctuation width ΔM of the load of the car 1 is calculated.

In the above-described embodiment, the fluctuation range of the car load is simply obtained from the load data for two samplings, and the door closing control is performed based on the fluctuation width. However, when the control unit 4 is operated in this way,
Depending on the timing of sampling, the door may be closed during getting on and off.

For example, as shown in FIG. 3, when the car load (vertical axis) changes with the passage of time (horizontal axis) after the door is opened and the passenger gets on and off, actually a large load is applied. Although the fluctuations continue, the difference between the two load data M0 and M1 obtained as a result of sampling in the cycle T is small, and the fluctuation width ΔM of the calculated car load becomes equal to or smaller than the threshold X. Is the case.

As described above, depending on the timing relationship between the change in the load and the sampling period, it is conceivable that a result that does not necessarily match the actual situation may be obtained in terms of probability. One way to avoid this is to set the value of the threshold value X as small as possible so that the probability that the variation width ΔM becomes equal to or less than the threshold value X is reduced. However, if the threshold value X is simply set to a small value, a response to slight vibrations in the car may occur, and the door may not be closed forever.

Therefore, the sampling period T is made finer,
By grasping the tendency of the change in the load more accurately, reading the fluctuation range within a certain period of time, and comparing it with the threshold value X, the door closing control is performed without setting the threshold value X unnecessarily low. A second embodiment of the apparatus of the present invention configured as described above will be described in detail with reference to FIGS.

In this embodiment, the control unit 4
As in the first embodiment, as shown in FIG.
1, a load data storage unit 42, a program setting unit 43, and a threshold value setting unit 44. The sampling period T in the CPU 41 is set to 0.2 seconds, and the number N of load data read out from the load data
More than in the first embodiment, N = 5, and the threshold value X of the load variation width is set to 5 kg as in the first embodiment.

That is, as shown in FIG. 4, in response to the change in the car load as shown in FIG. 3, the CPU 41 samples the car load signal at T = 0.2 second, and loads the load data M0, M1. ,..., M4 are sequentially stored in the load data storage unit 42. Then, the load data for these five times is read out, and the fluctuation range ΔM ′ (> X) of the car load is calculated from the difference between the maximum value and the minimum value (the difference between M4 and M2).
By calculating in this manner, the fluctuation width ΔM ′ can be obtained that is closer to the actual maximum fluctuation width therebetween.

Therefore, as in this embodiment, the number of load data to be read is set large, and the difference between the maximum value and the minimum value of the read load data is used to determine the actual load of the car. The fluctuation width is calculated, and the fluctuation width is set to the threshold X
Since the door closing control is performed in the following cases, it is possible to prevent the door from being closed during getting on and off as in the first embodiment in some cases.

Further, according to this embodiment, it is not necessary to set the threshold value X to a low value, and it is not necessary to respond to a slight vibration after the end of getting on and off, so that relatively stable door closing control is possible. is there.

In the second embodiment of the present invention, the calculation of the fluctuation range of the car load and the comparison with the threshold value are not executed until N pieces of load data are sequentially accumulated. Are relatively intermittently performed at one second intervals in the above example.

Therefore, a third embodiment in which the calculation of the fluctuation range of the car load and the comparison with the threshold value are continuously performed at shorter intervals to enable a timely door closing operation is shown in FIGS. 1 and 5. This will be described below with reference to FIG.

That is, in the third embodiment of the apparatus of the present invention, the time interval for calculating the fluctuation range ΔM of the car load is set to be short. That is, the CPU 41 shown in FIG.
When the load data for N times is stored after the door is opened, first the calculation of the variation width ΔM and the comparison determination with the threshold value X are executed, and thereafter the load data is calculated until the variation width ΔM is determined to be equal to or less than the threshold value X. Each time is stored in the cycle T, the calculation of the fluctuation range and the comparison with the threshold value X are performed.

That is, a specific method of calculating the fluctuation width in the third embodiment will be described with reference to a car load fluctuation characteristic shown in FIG.

As shown in FIG. 5A, it is assumed that the car load (vertical axis) changes with the lapse of time (horizontal axis) after the door is opened. When the CPU 41 samples the car load signal and sequentially stores the load data M1, M2,..., M5 in the load data storage unit 42, the CPU 41 first reads out the load data for the five times, and determines the maximum value and the minimum value among these. (The difference between M5 and M2) is used to calculate the first car load fluctuation width ΔM1.

If it is determined that the variation width ΔM1 is not smaller than the threshold value X, the CPU 41 thereafter proceeds from the newest one including the newly sampled and saved load data M6 to the fifth one.
The load data M6, M5,..., M2 for the batches are read out, and the second variation width ΔM2 (M6 and M
2). Then, the variation width ΔM2 is equal to the threshold X
It is determined whether or not:

Therefore, in this embodiment, the end of getting on and off is determined successively and continuously at sampling time intervals of a shorter cycle T, so that the variation in the time from the end of getting on and off to the closing of the door is reduced, and It gives a sense of security to the customer and enables a smooth door closing operation.

In the above-described first to third embodiments of the elevator door control device of the present invention, the sampling period T, the number N of data to be read, and the threshold value X can be set as appropriate.

As described above, the elevator door control device according to the present invention automatically detects the end of getting on and off, and automatically controls the door closing. It is also possible to prevent the door from being opened more than necessary. Therefore, the trouble of the door opening / closing operation is reduced for the user, so that the elevator can be used with ease and the practical effect is great.

[0041]

According to the elevator door control device of the present invention, the door closing operation is performed at a timing corresponding to the time length of getting on and off by the door closing control detecting the end of getting on and off etc. In addition, the elevator can be used with ease.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of an elevator door control device according to the present invention.
It is a block diagram showing an embodiment.

FIG. 2 is a control flowchart in the apparatus shown in FIG.

FIG. 3 is a graph illustrating detection of a car load fluctuation width in the apparatus shown in FIG. 1;

FIG. 4 shows a second embodiment of the elevator door control device according to the present invention.
It is a graph of a car load change explaining the car load fluctuation range calculation method in the embodiment.

FIG. 5 shows a third embodiment of the elevator door control device according to the present invention.
It is a graph of the load change which illustrates the fluctuation range calculation method of the car load in the embodiment of FIG.

FIG. 6 is a control flowchart in a conventional elevator door control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding car 2 Load measuring device 3 Tail code 4 Control part 5 Hall (hall) door 11 Car door 12 Door driving part 41 Central processing part (CPU) 42 Load data storage part 43 Program setting part 44 Threshold setting part

Claims (4)

[Claims] 1. A load measuring means for sequentially detecting a load of a car and outputting load data after an elevator door is opened, and a load data storing means for storing load data output from the load measuring means. A plurality of load data stored in the load data storage means, read out the load data a plurality of times, a load variation width calculation means for calculating the variation width of the car load from these data, and the variation width calculated by the load variation width calculation means A door opening / closing control means for controlling the door to close when the value is equal to or less than a predetermined threshold value. 2. The load fluctuation range calculating means calculates the fluctuation range from the load data for a plurality of times each time the load data is sequentially stored in the load data storing means for a plurality of predetermined times. The elevator door control device according to claim 1, wherein the elevator door control device is configured as follows. 3. The apparatus according to claim 1, wherein the load fluctuation range calculation means is configured to calculate the fluctuation range every time the load data is newly stored in the load data storage means. An elevator door control device according to any of the preceding claims. 4. The load variation width calculating means reads the load data stored a plurality of times in the load data storage means and compares and calculates a maximum value and a minimum value of the load data to calculate the variation width. The elevator door control device according to any one of claims 1 to 3, wherein the control device is configured to calculate.