JPS60236984A - Controller for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an elevator control device, and more particularly to a speed reference generation technique for controlling the speed of an elevator.

[Technical background of the invention and its problems] Recently, as buildings have become taller, elevators have become rapidly popular.
It is installed in most buildings being built today.

As the prevalence of elevators increases, they are used in everything from high-rise luxury offices and hotels to condominiums and multi-tenant buildings, and their uses are becoming more diverse. The performance of an elevator is largely determined by two major performance factors: ride comfort and landing level. Conventionally, only high-end models were equipped with devices that satisfied high performance, and complex systems tended to result in high prices.
Due to the diversification of applications, low-priced popular models are expected to have almost the same performance. One of the factors that has an important influence on these two performances is the speed reference signal. The speed reference signal is an elevator.

Comply with the requests of the passengers in the car or the passengers waiting at the platform,
This is a signal that serves as a reference for speed control of the elevator from the start of operation to stop 1 when operating from one floor to another. In other words, the speed reference signal directly or indirectly influences the speed, ride comfort, efficiency, and landing level of the elevator. In particular, from start to stop, there are several points that most affect the ride comfort of an elevator, such as when the operation starts, during acceleration, at the end of acceleration, when deceleration begins, and when landing on the floor. The time when deceleration starts, which has a big influence on the invention, will be explained. FIG. 1 is an example of a time chart of a speed reference signal for an elevator, and shows the operation from the left side to the time when the elevator reaches the maximum speed, decelerates, and stops. The elevator, which has finished accelerating and is running at a constant speed, prepares to start decelerating when it comes a certain distance from the destination floor, and continues running at a constant speed while determining the point at which deceleration begins. This is the mode indicated by 1 in the figure. At this time, the timing for starting deceleration is determined by comparing speed standard 2 (hereinafter referred to as distance base pattern) corresponding to the deceleration distance, that is, the distance between the elevator and the destination floor, and the current speed standard of the elevator. The distance base pattern is a pattern that determines the speed when traveling a certain deceleration distance using a predetermined deceleration and jerk when stopping. When making this comparison, we did not switch to the distance-based system immediately after the start of deceleration, but instead maintained a constant jerk range of 4.
After driving in , it switches to a distance-based pattern. In other words, the jerk travel at the start of deceleration is determined by the difference 3 between the distance base pattern and the constant travel speed.

On the other hand, the distance an elevator travels from when it starts to when it touches the floor varies depending on the height between the floors of the building.Especially in the case of high-speed elevators, the distance traveled by the elevator is reduced before reaching the maximum speed.
Hereinafter, this will be referred to as short run. ), it is desirable to drive as fast as possible in order to shorten travel time.

In other words, this shows that the speed reference when traveling at a constant speed at the start of deceleration 1 described above changes depending on the traveling distance. When deceleration starts from the above-mentioned constant speed, decelerates at a constant deceleration through jerk, and lands on the floor, the deceleration distance differs depending on the above-mentioned constant speed, and it is necessary to change the point of comparison with the distance-based pattern. In other words, it is necessary to change the comparison value 3 in FIG. 1 depending on the speed. However, in the past, the first
Since the comparison value 3 shown in the figure is constant, if it is adjusted to be the best deceleration speed reference on a certain floor, on other floors the jerk at the start of deceleration may be too short, or the distance Problems such as not being able to switch to the base pattern occurred, resulting in a loss of ride comfort, and when making adjustments, it was necessary to make adjustments at certain points and make judgments based on the overall balance.

[Object of the Invention] The present invention has been made in view of the above points, and provides an elevator control device that simplifies adjustment when switching to a deceleration pattern and improves riding comfort. [Summary of the Invention] The present invention provides a distance beta pattern calculation unit that inputs a deceleration distance and outputs a distance-based pattern when deceleration is controlled by a control device for an elevator that travels based on a speed standard according to the traveling distance and decelerates and stops according to a distance-based pattern. , the speed reference is inputted I2; a comparison value table reading unit that stores a comparison value according to the speed reference; and a comparison value table reading unit that stores a comparison value according to the speed reference, and compares the sum of the speed reference and comparison value with the distance base pattern and reads the sum of the speed reference and the comparison value. The above object is achieved by providing a deceleration start detection section including a calculation comparison section that outputs a distance beta pattern when the distance reaches the distance base pattern or more.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. First, the principle of the present invention will be briefly explained. Second
In the example of the deceleration speed reference time chart shown in the figure, let S be the deceleration distance until stopping. At this time, if the deceleration and jerk are constant, the area or distance indicated by sl and 82 in the figure will be constant, and the remaining area s -81-89Fi
It is a function of deceleration start speed ■. In other words, the deceleration start speed ■ is a function of the deceleration distance S, and is expressed by the following equation (1).

V = V (S) = V (8-81-82) ---
-----(11) Equation (1) above is a quadratic equation with a real solution, and the relationship between S and ■ can be calculated in advance.On the other hand, the distance-based pattern vL can be calculated using the distance-based deceleration If the deceleration distance is 8 in the example of the time chart, the following equation (2) is obtained.

VL = VL(S) = VL (5-82) --
(2) Therefore, the difference between the distance base pattern ■L when the elevator reaches a certain deceleration distance #S and the deceleration start speed V obtained by equation (1) becomes the comparison value ΔV.

ΔV=VL(S-82)-V(S-81-By, )-
(81 (From formula 81, if a certain deceleration distance M S is given i'', the comparison value can be reduced to Δ■.

t7'c, 8 (: Yot) V (8-81-82)
It is possible to show Δ■ as a function of fog, ■. The present invention uses the comparison value Δ■ corresponding to the deceleration start speed V determined in this way. Having briefly explained the principle of the present invention above, the structure of one embodiment of the present invention will now be described.

FIG. 4 is a block diagram of an elevator control device to which the present invention is applied. 6-car elevator sequence control section,
7 is a speed reference generator, 8 is a speed controller, 9 is an electric motor, river is an elevator hoisting machine, and 11 is an elevator car. Various input signals to the elevator, such as calls and safety switches 12, are input to the sequence control section 6. The sequence control unit 6 determines the required signal from among various signals and sends a predetermined signal to the speed reference generation unit 7. The speed reference generation section 7 generates a speed reference 13 from start to stop, including the deceleration start portion related to the present invention, and sends it to the speed control section 8. The speed control section 8 controls the voltage sent to the electric motor 9 in accordance with the speed standard to drive the elevator car 11 by the hoisting machine IO.

FIG. 5 is a block diagram showing an embodiment of the present invention, and FIG. 6 is a flowchart for clearly explaining the operation of FIG.

In FIG. 5, 16Fi is the destination floor position signal sent from the sequence control unit 6 shown in FIG. 4 above, +
5 is a car position detection pulse, 17 is a deceleration distance calculation unit, 18
19 is a comparison value table reading section, 2 ( ) is an arithmetic comparison section, 21 is a deceleration start signal outputted by the arithmetic comparison section, and 22 is a deceleration speed reference generation section. When the reference reaches its maximum value and the vehicle travels at a constant speed, a deceleration start point is calculated in accordance with the illustrated deceleration preparation commands from the sequence control section 6 shown in FIG.

The deceleration start point is calculated by the deceleration start detection section shown in FIG. 5, 23. First, in order to calculate a comparison value, the current traveling speed standard ■ from a speed standard generator (not shown) is input to the comparison table reading unit 19, and the comparison value corresponding to ■ is calculated in advance by the above-mentioned formula (8) I7. Read Δ■ as data from the resulting table. - Calculation of the blade distance base pattern is performed as follows. The pulse 15 generated from the pulse generator 14 connected to the electric motor 9 shown in FIG. 4 and the destination floor 16 sent from the sequence controller are input to the deceleration distance calculation section 17. The deceleration distance calculation unit 17 calculates the current position of the car using the pulse 15, and inputs the deceleration distance S determined by calculating the absolute value of the difference from the destination floor signal 16 to the distance base pattern calculation unit 18. The distance base pattern calculation unit 18 reads a distance base pattern corresponding to the deceleration distance S from a pre-calculated table and outputs it as vL. The above-obtained 7'(vl, , △■ and When the value obtained by adding the comparison value ΔV to the speed ■ exceeds the distance base pattern VL, a deceleration start command 21 is sent to the deceleration speed reference generating section 22 to start deceleration.

■＋△■−vL≧0 −〜−−−−−−−−−−−(4
) With the above, it is possible to perform a comparison value corresponding to the maximum speed, and it is possible to detect the optimum deceleration starting point.

[Effects of the Invention] As described above, according to the present invention, the adjustment when switching the speed pattern of the elevator to the deceleration pattern becomes easy, and an elevator with good riding comfort can be provided.

[Brief explanation of the drawing]

Fig. 1 is an example of a time chart of an elevator speed reference signal, Fig. 2 is an example of a deceleration speed reference time chart, Fig. 3 is an example of a distance-based deceleration time chart, and Fig. 4 is an elevator control to which the present invention is applied. FIG. 5 is a diagram showing an embodiment of the present invention, and FIG. 6 is a diagram for explaining the operation of FIG. 5. ■8...Distance base pattern calculation section 19...Comparison value table reading section 20...Calculation comparison section 23...Deceleration start detection section Agent Patent attorney Noriyuki Chika (and one other person) Figure 1 One day Terama - Sukema

Claims (1)

[Claims] A control device for an elevator that travels according to a speed standard corresponding to the distance traveled and decelerates and stops according to a distance-based pattern includes a distance-based pattern calculating section that inputs a deceleration distance and outputs a distance-based pattern, and a distance-based pattern calculation section that inputs the speed standard and outputs a distance-based pattern. A comparison value table reading unit that stores a comparison value according to the speed standard, and compares the sum of the speed standard and the comparison value with the distance base pattern, and determines that the sum of the speed standard and the comparison value has reached the distance pace pattern or more. 1. A control device for an elevator, comprising: a deceleration start detection section comprising a computation and comparison section that outputs a distance base pattern.