JPS5852166A - Method of correcting position of elevator cage - 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 The present invention relates to a method for correcting car position in an elevator car.

The information required to operate an elevator includes the input of a push button by a passenger to call the elevator and the status of various operation switches, but one of the most important information is the information on the car status. There is a current location. Several years ago, when the elevator was first invented, or even now in some models, a device called a floor selector, which has the function of operating at a fixed scale according to the actual movement of the elevator, was used. Detecting the current position of the basket.

However, with advances in semiconductor technology and microcomputers over the past few years, elevator control functions have been made semiconductor and contactless.

In particular, recently there has been an active movement to use microcomputers as semiconductors to cover the differences between each model and the differences in user specifications with software, and this has already been put into practical use. However, the elevator control device, especially one that is composed of a microcomputer, contains information about the current position of the car, which is even more important than the floor selector mentioned above. , Most of elevator control involves detecting the position of the car and controlling it. Therefore, a method of detecting the position of the car without using the floor selector described above will be described.

Figure 's1 is a diagram showing the configuration of a conventional elevator control system. In the jI1 diagram, l
2 is a hoisting machine, 2 is an elevator car, 3 is a suspension weight, and 4 is a pulse that synchronizes with the rotation of the hoisting machine and generates different types of pulses depending on the direction of rotation of the elevator car in the ascending and descending directions. a generator; 5 a hoisting rope connected to the elevator car and the hoisting weight via a hoist; 6 a control device for controlling the movement of the elevator; 7 provided between the elevator car and the control device; and cables for control signals and power supply of each control device (
(hereinafter referred to as a tail cord), 8 is a hanging rope for compensating for the unbalanced load applied to the hoisting machine by the hoisting rope 5 and f-le cord 7 due to the stop position of the elevator car.

FIG. 2 is a block diagram of an example of a position detection circuit conventionally constructed from a hard logic circuit or the like. The configuration and operation of FIG. 2 will be explained below.

In Fig. 2 Kg, 9 is an elevator control system as shown as an example in Fig. 11, 4 is the pulse generator mentioned in Fig. 1111, 10 is a counter circuit, 11 is a power supply device, 13 is a microprocessor, and 13 is a memory circuit,
14 is a data and address path line.

The information related to the position of the elevator car given by the elevator control system is synchronized with the rotation of the hoisting machine described in FIG. The pulse generator 4 generates pulses that are synchronized with the rotational direction and rotational speed of the hoisting machine. This pulse is input to the counter 10, which is made up of a hard logic circuit, and uses different types of pulses in the ascending and descending directions to add the count value in the ascending direction and subtract the count value in the descending direction to position the car. is stored in the counter 10 as a count value corresponding to . However, if you count randomly, you will only get the relative position from one point to another, so before the elevator starts normal operation, set an absolutely determined floor as the initial value of the counter and set it in advance. , determined by the height of each service floor in memory 13? & Set the value and set the counter to 10.
The count value is input to the microprocessor 12 through the path line 14, which is a set of several connections, as car position information, and the height value of each service floor previously set in the memory 13 is inputted. The current position of the car is determined by comparison with the numerical value determined by .

In elevator control, the position of the elevator car is the basis for everything, so the data obtained from the counter 10 is required in most microprocessor processing.

Although the elevator control system and device shown in FIG. 11 and FIG. 2 can obtain a position signal of the elevator car, there are the following drawbacks in position counting by the elevator control system in the first wI. That is,
The single beta control system in Fig. 1 uses a count value obtained by counting pulses synchronized with the rotation of the hoisting machine as the basic value of the elevator position signal. Since the count value is not obtained from the tape, the unbalanced load caused by the hoisting rope, tail cord, and hanging rope changes depending on the position of the car, and the unbalanced load causes the hanging rope to extend, resulting in the above-mentioned. An error occurs between the count value obtained by the elevator control system shown in Figure 1 in synchronization with the rotation of the hoist and the actual car position.

As an example, set the load of the elevator □ control □ system described in Figure 1 so that ``car load = hanging weight'' r hoisting rope = combing rope'' If the vertical axis is the amount of unbalanced load due to the horizontal view tail cord and the amount of change in the elevator position is taken as the base point, then the result will be as shown in Figure TS3, and the suspension rope will elongate in proportion to the unbalanced load as shown in Figure 3. Therefore, the error value between the value obtained by the elevator control system in Figure 1 and the value determined by the floor height set in memory 13 (the value directly obtained from the car position) is the same as in Figure 3. If the horizontal axis represents the change in car position and the vertical axis represents the error between the count value and the set value, the result will be as shown in Figure 4. In the control system shown in the llt diagram, the higher the service floor height, the greater the difference between the car position colorad value and the set value. This caused an error. Elevator systems that require high landing precision end up being very inaccurate and have large landing errors.

The present invention has been made in view of the above points, and provides a car position correction method that allows obtaining a more accurate position signal.

The present invention will be explained below.

The amount of change in the unbalanced load due to the tail cord due to the elevator car position is as follows:

Then, the unbalanced load 11ty is expressed as )l'::aX, and if the elongation ratio of the suspension rope due to the amount of unbalanced load is b, then the count error value 2 becomes a constant ratio as it goes toward the top floor. , and the count value decreases from the value comparable to the floor height, so z = -by = -a b x Therefore, if the ratio between the unbalanced load and the elevator car position is k, then = ab If the floor is used as the base point for pulse counting, the Callan error amount is uniquely determined by the moving distance r of the elevator car.

FIG. 5 shows a method for correcting the position of an elevator car according to the present invention, in which numeral 4 indicates the pulse generator, 10 a counter device, 9 an elevator control device, and 15 a processing function by a microcomputer.

FIG. 6 shows one embodiment of the processing flow of the position correction method of the present invention shown in FIG.

The operation of the position correction device will be explained with reference to FIGS. 5 and 6.

When the elevator car is stopped at the lowest floor and the power is turned on again to the elevator system, the microcomputer for elevator control is also started, and the microcomputer is started from a predetermined address by the microprocessor used in the microcomputer. When starting, first,
The microcomputer performs necessary processing, such as clearing the memory used, and the counter device is set to a count value comparable to the elevator car position, for example, "O'" at the bottom floor, and from then on, normal elevator operation is performed. Do the following.

When the elevator starts to rise due to the car call X being a hall call, the pulse generator 4 generates a pulse in synchronization with the rotation of the hoisting machine, and the counter device IO changes to the control value 4g19.
A counter device 1o that starts addition counting based on an upward direction signal and a pulse signal from a pulse generator 4.
The count value is input to the microprocessor in the microcomputer through the microcomputer in the elevator position correction routine in the elevator control software routine, and is once stored in the RAM memory 16 as a new count value. Also, as the old count value, for example, l″O″ is the value before the elevator car starts moving.
If stored in the AM memory 17, the absolute value of the difference between the new count value stored in the RAM memory 16 and the old count value stored in the RAM memory 17 is used to determine whether or not the elevator is moving; If the difference between the new count value and the old count is "0", the elevator car is considered to be in a stopped state, and in this case, the elevator car position correction is deemed unnecessary and the correction routine is ended. As mentioned in Figure 4, as the elevator car moves toward the top floor, the unbalanced load caused by the hanging rope, control cable, and compensation rope increases in proportion to the moving distance. Due to elongation,
Even if the pulse count value is a value comparable to the destination floor, e.g. Since the number of pulses generated by the pulse generator synchronized with the rotation of the hoisting machine □ is lower than the distance traveled by the hanging rope in value calculation 19, the correction calculation section subtracts kx from X. The new count value read in this routine and stored in the RAM memory 16 is used as correction data in this correction routine again. The count value is stored in the old count value memory 17, the car position correction routine is completed, and the routine returns to the normal elevator control routine.

Further, when the elevator approaches the destination floor before deceleration, a deceleration command is issued to the control device 9.

As described above, the device of the present invention overcomes the aforementioned drawbacks and provides a more accurate elevator position signal.

In the present invention, correction using a hanging rope, a control rope, and a compensating rope has been described, but a case without compensating rope can be similarly analogized to a harmful bird.

In addition, if the lowest floor is used as the base point for the count value of the elevator car position, the correction value will be a proportional value that is constant depending on the floor height. Storing corrected values can also be analogized to containers.

[Brief explanation of drawings]

Figure ts1 is a diagram showing the configuration of a conventional elevator control system, Figure 2 is a block diagram of a position detection circuit conventionally configured using hard logic circuits, etc., and Figure 3 is a diagram showing the relationship between elevator car position and amparun load. The fourth factor is a diagram showing the relationship between the elevator car position and the count error value. Figure 5 is a diagram showing an embodiment of the elevator car position correction method of the present invention. Figure 6 is JII5# The figure which showed one example of the process flow of the position correction force method of the elevator car shown in A. 16...New count value storage memory, 17...Old count value storage memory, 18...New and old count value displacement calculation unit, 19...Correction calculation unit, J...Correction value calculation unit, 4 ... Cart position storage memory. (7-317) Dairuiri Patent Attorney Kensuke Norichika (and 1 other person) Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A pulse generator that generates a number of pulses synchronized with the rotation of a hoisting machine, a counter device that adds or subtracts the number of output pulses of the pulse generator according to the rise and fall of the elevator, and an elevator. It is equipped with a storage device that stores pulse count values in advance according to the height of each floor of the service floor, and by comparing the count value of the counter device with the count value of the storage device, the elevator car position is detected and a calculator is used. In an elevator position control device that generates a control signal using The error in the count value of the counter device caused by the extension of the car hanging rope that changes depending on the height of the car position,
41. A method for correcting the position of an elevator car, in which a predetermined correction value is subtracted when the elevator is going up, and added when the elevator is going down, in accordance with the moving distance of the elevator car determined from the count value of the counter device. 2. The error in the count value of the counter device caused by the length of the car hanging rope that changes depending on the height of the car position is
An elevator car position correction method according to claim 1, characterized in that a count value stored in advance in a storage device is corrected using a predetermined correction value.