JPH02239076A - Elevator control device - Google Patents

Abstract

PURPOSE:To automatically carry out the adjustment of a travel pattern, arrival floor accuracy, and a riding quality at the time of installing an elevator by giving an adjusting travel command from an adjusting travel command means to a travel control means for adjusting the correction value of a travel pattern and obtaining the optimum value of the correction value while making a cage travel with the adjusting travel pattern. CONSTITUTION:At the time of instal ling an elevator cage 9 on a building and adjusting same, the elevator cage 9 is made automatically travel from a specified starting floor to another specified responsive floor with a defined travel pattern which is previously set for adjusting traveling by an adjusting travel command means 6. In this case, the traveling speed of the elevator cage 9 at the time of receiving an arrival-floor zone arrival detecting signal from an arrival-floor zone detecting means 14 is detected by a speed detecting means 13 and the traveling speed is compared with a reference value by a correction value operating portion 4. A correction value is operated in accordance with this difference to obtain the optimum correction value and this correction value is given to a travel control portion 2. Thereby, the elevator cage 9 can be made travel with a smooth traveling pattern even at the time of traveling a short distance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a control device that can automatically adjust the running speed of an elevator.

(Prior Art) Elevators are also becoming faster as buildings become taller, and even such high-speed elevators are required to have excellent ride comfort and precise landing accuracy. In order to achieve this, even if the distance traveled from the departure floor to the arrival floor is long or short, efficient and smooth speed control is required at all times in accordance with the travel distance.

This is because, although Fig. 7 shows an example of speed commands for long-floor travel and short-floor travel, in the case of long-floor travel A, even if the rated speed command for the elevator is set, the short Floor running B
In this case, a speed command is given to decelerate the vehicle before reaching the rated speed, which may cause sudden accelerations and decelerations, especially when traveling on short floors, resulting in poor ride comfort.

This tendency becomes greater as the rated speed of the elevator increases.

Therefore, in conventional elevator control devices, the following measures are generally taken in order to accurately stop the elevator at the arrival floor even if the speed of the elevator is increased.

(.1) From acceleration to rated speed, a constant speed command is always generated regardless of travel distance (a shown in Figure 7)
. In short floor operation, the speed command is shifted toward deceleration (B in FIG. 7).

The speed command described above will be referred to as a "time base pattern" here.

<<2>> For deceleration, a speed command is generated according to the remaining distance to the arrival floor (b shown in FIG. 7). For example, remaining distance MS
For (a), the elevator is set at a constant deceleration β (a /see
2) The speed command VS for running the vehicle is given by the following equation.

VS −, / 2βS...
0> The above speed command will be referred to as a "distance base pattern" here.

(3) Furthermore, when the elevator reaches the vicinity of the arrival floor, a more accurate position signal is given, and the elevator is stopped at the normal landing position (C shown in FIG. 7).

The above speed command is called a "landing pattern".

With the above-described speed command, the high-speed elevator can also land at the arrival floor with high precision.

Here, the elevator speed command has conventionally been set in consideration of riding comfort so that the rate of change in acceleration and deceleration (hereinafter referred to as "jerk") does not become too large. Since the region of landing pattern C also travels with jerk, in order to smoothly transition from the above distance base pattern 1 to landing pattern C, the remaining distance S to the arrival floor described in equation (1) is necessary. In reality, the target value must be set slightly lower. In other words, it is given as follows.

VS----12
) In equation (2), ΔS is called a correction distance, and this ΔS is arbitrarily set depending on the characteristics of the landing pattern and the gain.

Modern elevator control devices are mainly controlled by microcomputers, and the current position of the elevator, the arrival floor, etc. are calculated as digital quantities using pulse signals. Therefore, when a microcomputer is used, the remaining distance S is also given as a calculated digital quantity.

This control device using a microcomputer has the advantage that the departure floor, current position, and arrival floor can all be stored as data in the memory of the microcomputer, and these data can be used as desired. However, even if the remaining distance S given by the above calculation is used, the following problems occur.

That is, there is a control delay in the control system that actually drives the elevator motor. Elevator control systems are set to have slower control response speeds than those of general industrial machines, taking ride comfort into account, and therefore have large control delays.

For this reason, the speed and speed command at the time of transition from the distance base pattern b to the landing slam C are not constant, which has an adverse effect on ride comfort and accuracy during floor landing control.

In this regard, FIG. 8 is a diagram showing a case where the transition from distance base pattern b to landing pattern C is good, and FIGS. 9 and 10 are diagrams showing bad examples, and the transition from distance base pattern When shifting to C, the speed suddenly decreases or increases, making the ride uncomfortable.

Therefore, in order to avoid situations like these bad examples and to make the transition from the distance-based pattern B of the elevator speed command to the landing pattern C smooth, it is now possible to prevent the elevator from starting and then stopping. Control is performed to calculate the total travel distance until the speed is reached, select the optimal value from among multiple correction values according to the calculated value, and correct the speed command value VS using this value as △S in equation <2>. ing.

However, as mentioned above, this correction value ΔS is not fixed and takes different values depending on the travel pattern (short distance travel on the first floor, short distance travel on the second floor, etc.). At the time of installation, it is necessary to perform various running patterns many times depending on the building and to set the optimal correction value for each pattern. In the case of buildings with similar structures, this work placed a heavy burden on on-site adjustments.

(Problems to be Solved by the Invention) As described above, in the conventional elevator control device, the optimum correction value is set for each building in which the elevator is installed, depending on the various travel patterns of long floor travel and short floor travel. There was a problem in that it required a great deal of labor and effort to do so.

The present invention was made to solve the problems of the conventional elevator control device, and has the following objects: 1. To provide an elevator control device that can automatically perform correction value adjustment work. .

[Structure of the Invention] (Means for Solving the Problems) The elevator control device of the present invention calculates the travel distance from the departure floor on which the elevator car travels, and calculates the remaining distance from the current position of the elevator car to the responding floor. a travel control means that calculates and subtracts a correction value corresponding to the travel distance from the remaining distance, and generates an elevator speed command pattern according to the value of the subtraction result to control the travel speed of the elevator car; Adjustment travel command means for giving an adjustment travel pattern to the travel control means for causing the elevator car to travel between predetermined floors in order to adjust the correction value; a landing zone detecting means for detecting; a speed detecting means for detecting the traveling speed of the elevator car when receiving a detection signal from the landing zone detecting means; and during adjusted traveling based on a command from the adjusting traveling command means; Calculating the correction value according to the magnitude of the difference between the travel speed of the elevator car detected by the speed detection means and a predetermined reference value, and determining the optimum correction value and providing the correction value to the travel control means. and a value calculation means.

(Function) In the elevator control device of the present invention, the travel control means calculates the traveling distance from the departure floor on which the elevator car travels, calculates the remaining distance from the current position of the elevator car to the response floor, and calculates the remaining distance from the elevator car's current position to the responding floor. A corresponding correction value is subtracted from the remaining distance, and an elevator travel speed command pattern is generated in accordance with the value resulting from this subtraction to perform travel speed control.

In order to adjust the correction value to the optimum value, when the elevator car is installed in the building and the adjustment is made, the adjustment travel command means causes the elevator car to move in a predetermined travel pattern preset for the adjustment travel. Automatically travels from a specific departure floor to another specific response floor, and during this adjustment travel, the landing zone detection means detects the traveling speed of the elevator car when it receives a landing zone arrival detection signal. A correction value calculation means compares this traveling speed with a predetermined reference value, calculates the correction value according to the magnitude of the difference, calculates the optimum correction value, and calculates the correction value again. By applying this to the travel control means, a smooth travel pattern is realized even when the elevator car travels a short distance, and ride comfort is improved.

(Example) Hereinafter, embodiments of the present invention will be explained in detail based on the drawings.

FIG. 1 is a circuit block diagram of an embodiment of the present invention.
The elevator control device 1 includes a travel control section 2 that controls the elevator's travel, a speed error detection section 3, a correction value calculation section 4, a correction data table 5, and an adjustment travel command section 6.
The adjustment command 7 is manually inputted to the adjustment travel command section 6 from the outside.

Also, as a mechanical system that is controlled by the elevator control device 1, a sheave 8 is driven by the rotation of a motor (not shown), an elevator car 9 is raised and lowered by the rotation of the sheave 8, and the elevator car 9 is moved up and down by the rotation of the sheave 8. The car 9 is provided with a counterweight 11 connected to the other end of the rope 10. Furthermore, it includes a pulse generator 12 that outputs a pulse signal accompanying the rotation of the sheave 8, a speed detector 13 that detects the rotational speed of the sheave 8, and a position detection switch 14 attached to the elevator car 9.

Output pulse 12a of the elevator position detection pulse generator 12 and detection signal 13 of the speed detector 13.
a are both connected to be input to the travel control section 2 of the elevator control device 1.

Then, the speed signal 13a is digitized by the travel control section 2 and manually inputted to the speed error detection section 3 as speed data 2a.

Position detection switch 14 attached to elevator car 9
is for detecting that the car 9 is within a predetermined distance (usually 200 m) above the floor level of each floor, and its detection signal 14a is input to the speed error detection section 3. ing.

The error data 3a detected by the error detection section 3 is input to the correction value calculation section 4, and the correction value 4a of °C is stored in the correction data table 5 as the result of calculation by the supplementary value calculation section 4. It has become.

The correction data 5a stored in the correction data table 5 is
The adjustment 2 completion data 5b is supplied to the travel control section 2 to correct the travel control, and the adjustment 2 completion data 5b is supplied to the adjustment travel command section 6 for monitoring the correction data.

The adjustment travel command unit 6 uses external adjustment commands 7 as human power,
A travel command 6a for adjustment is given to the travel control section 2.

The operation of the elevator control device having the above configuration will be explained next.

FIG. 2 is a flowchart showing a process performed when an adjustment worker adjusts a correction value for travel control after installing the elevator in a building. First, the adjustment operator manually issues an adjustment command 7 for the correction value of the traveling control river to the elevator control device 1 from the outside by operating a switch or using a maintenance console (step Si).

Upon detecting the adjustment command 7, the adjustment travel command unit 6 reads the adjustment completion data table DT (1) of the correction data table 5.
(FIG. 6(d)), it is confirmed that the adjustment has not been completed (step S2), and the story height of the building stored in advance in the storage section (not shown) of the travel control section 2 is , reads data such as the number of floors and rated speed data of the elevator, and calculates the number of floors n for maximum short distance travel (step S3,
S4).

Here, short-distance running (short run) refers to a running pattern in which the elevator travels over a short distance and only accelerates and decelerates without running at the rated speed, as shown by curve B in FIG. When the rated speed is high, for example, the vehicle may not only run on the first floor from the second floor to the third floor, but also run on the second or third floor.

Next, in step S5, adjustment regarding the maximum floor short run (n floors) is performed, and this adjustment function will be explained using the flowchart of FIG.

First, building data is taken out and all distances traveled on n floors are extracted (steps Sll to S13).

At this time, if the distances are the same, only one pattern will be extracted as a representative.

Next, the floor information at both ends of the extracted travel pattern is
il is output to the control section 2 (step S14).

The traveling control section 2 receives this data and performs a reciprocating operation between the floors instructed for adjustment traveling, but during this reciprocating operation, the correction value calculation section 4 performs the operations shown in FIGS. 4 and 5. Perform calculations to obtain appropriate correction values as shown in the flowchart, and store the results in the correction data table 5 as DTb and DTe.
Set as . The details will be described later.

For all of the n-floor short runs extracted as described above, a round-trip operation is commanded, and when the correction value has been set by checking the data table DTd in FIG. 6(d), the travel command is canceled, The correction value adjustment for the nth floor short run is performed (steps S15 to S17).

Next, returning to the flowchart in FIG. 2, the value of n is subtracted by 1 (step S6), and if the result is not 0 (step S7), there is one floor less than the above correction value adjustment for n floors (
n-1. ) Regarding the floor short run, the correction value is adjusted again by the process shown in the flowchart of FIG.

In this way, the correction values corresponding to the distances of each short run are adjusted until the value of n in the flowchart of FIG. 2 becomes 0.

Next, the procedure for adjusting the correction value during adjustment driving will be explained.

The travel control unit 2 travels according to the command 6a from the adjustment travel command unit 6, but at this time, the travel control unit 2 detects the position of the car 9 by adding/subtracting pulses from the pulse energizer 12, and detects the position of the car 9. The running of the car 9 is controlled by detecting the running speed of the car 9 using the signal.

Further, the travel control section 2 digitizes the manually input speed signal 13a and supplies it to the speed error detection section 3.

The speed error detection unit 3 operates according to the flowchart shown in FIG. 4. First, the elevator car 9 approaches the destination floor, its traveling speed decreases, and it reaches a predetermined distance before the floor level position. is detected using the speed data 2a and the signal 14a of the position detection switch 14 (steps S21, S22).

When the above conditions are met, the speed error detection unit 3 inputs the speed data (Step 323), and the error value 3a between the speed data (reference value) that the elevator 9 should take at a predetermined distance before the floor level position is calculated, and the correction value calculation unit 4
(steps S24, S25).

The correction value calculation unit 4 determines whether the current correction value is larger or smaller than the optimum value based on the speed error value 3a, as shown in flowchart 1 of FIG. 5 (steps 331 to S33),
After increasing or decreasing the correction value to bring it closer to the optimum value (step S34), it is set in each table DTa-DTc of the correction data table 5 at the same time as the mileage (step S3).
5).

In this way, when the error value converges and becomes approximately O while repeating the round-trip operation between the same floors (step ";'S33
), the adjustment end r of the travel is the end r shown in FIG. 6(d).
It is written in the data table DTd (step S36).

In the above manner, the correction value calculation unit 4 sequentially sets the optimum correction value for all short run patterns.
(Figure 3 Step S]. 3-816).

When the adjustment of the supplementary 1r value is completed, the elevator stops because there is no longer a command from the adjustment travel command unit 6, and the adjustment operator then turns off the adjustment command 7 (step S1
7). Incidentally, when exiting from the adjustment state, the correction value calculation unit 4 sorts the created correction value data table 5 in terms of distance data (changes the order from smallest to smallest) and finishes the adjustment (steps s31 and s36 in FIG. 5, S37).

In this way, with the elevator control device of this embodiment, when the elevator is installed in a building, adjustments to landing accuracy, ride comfort, etc. can be automatically performed simply by inputting commands. Note that this can be done not only at the time of installation, but also at the time of readjustment due to changes over time, by inputting the adjustment command 7.

Furthermore, in the above embodiment, the adjustment is made for all types of short run, and even for one type, it is configured to be adjusted for all types of floor distance, but the type of short run to be adjusted and each It is also possible for the adjustment operator to narrow down the points and give commands regarding the types of distances in the type, and in this way the adjustment time can be further shortened.

[Effects of the Invention] As described above, according to the present invention, the adjustment travel command means gives an adjustment travel command to the travel control means in order to adjust the correction value of the travel pattern, and the correction value is determined while the car is traveling with the adjustment travel button. By determining the optimal value of Detailed adjustment work that was too complicated to carry out can be done labor-savingly and in a short time.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram of an embodiment of the present invention, FIG. 2 is a flowchart showing the main routine of correction value calculation processing in the above embodiment, and FIG. 3 is a circuit block diagram of an embodiment of the present invention.
FIG. 4 is a flowchart showing the speed error calculation process in the above subroutine; FIG. 5 is a flowchart showing the optimum correction value calculation process in the above subroutine; FIG. 6(a) -(d) are structural diagrams of various data in the correction data table, FIG. 7 is an explanatory diagram showing the running pattern of a general elevator, FIG. 8 is an explanatory diagram showing the running pattern at the end of correction value adjustment, and FIG. FIG. 10 and FIG. 10 are explanatory diagrams each showing a running pattern when the correction value is incorrectly adjusted. 1...Elevator control device 2...Traveling control section 3...Speed error detection section 4...Correction value calculation section 5...Correction data table 6...Adjustment traveling command section 7...Adjustment Directive 8・
... Sheave 9 ... Car 12 ... Pulse generator

Claims (1)

[Scope of Claims] The distance traveled by the elevator car from the starting floor is calculated, the remaining distance from the current position of the elevator car to the response floor is calculated, and a correction value corresponding to the traveled distance is calculated from the remaining distance. travel control means for controlling the travel speed of the elevator car by generating an elevator speed command pattern according to the value of the result of the reduction; adjustment travel command means for giving an adjusted travel pattern to the travel control means; landing zone detection means for detecting when the elevator car has reached a predetermined distance before the response floor; a speed detection means for detecting a running speed of the elevator car when receiving a detection signal; and a speed detecting means for detecting a running speed of the elevator car when the detection signal is received; an elevator control device comprising: correction value calculation means for calculating the correction value according to the magnitude of the difference from a reference value obtained by determining the optimum correction value, and providing the optimum correction value to the travel control means.