JPS5953379A - Detector for position of 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 The present invention can improve the accuracy of car position detection by X in an elevator system that uses a small A1η machine (hereinafter referred to as a "microcomputer") such as a microcomputer in the control device section. The present invention relates to an elevator position detection device.

[Technical background of the invention]

With the introduction of microcomputers in elevator control devices, the system configuration has changed significantly from the conventional relay control system.

The biggest change in the system is that the 1'+i floor selector that detects the elevator car position is no longer necessary. Dimensions of the floor selector and 1 elevator hoistway are scaled to about 1750 to I/200. Elm 4
- It detects the moving car position 16 in synchronization with the movement of the car in the evening.

An alternative to this floor selector is to locate the position shown in FIG. To this extent (detector 1 is generally well-known, the Lux encoder (KO at every fixed distance is 90
This is a device that generates two rectangular waves/waveforms with a zero phase shift. ) is mainly used. The output of the position detector 1 consisting of this pulse encoder is input to the control board 2, and a binary up/down counter (not shown) is used to adjust and subtract the pulse according to the moving direction of the elevator. is processed by the microcomputer in control board 2 and sent to Envelope 1.
It creates the position data necessary for position display and elevator control. Conventionally, the drive method for the position detector 1 is Hakato 3.
Qi attached to! A common method is to rotate the tape wheel 5a attached to the position detector 1 at step 4, and this method can provide a very accurate position signal for the car position. In Figure 1, 6 is the city, fJh machine, 7 is the TD brake, 8 is the hoisting person, 9 is the hoisting sheep,
10 is the auxiliary sheep, 1 is the main loaf, 121fJ counterweight, 131d pitch spring, and 14 is the corner floor rubber.

However, this drive method has 12 σ>i−p lj
5a + 5b was required, and the mounting structure for the tape 4 and the position detector (pulse encoder) 1 had to be made robust.

For this reason, improvements have been made in terms of price and installation, and as shown in Figure 2, the V
The structure has started to be attached directly to l+.

However, when this 21st C10 method 1 Blue is adopted, the following disadvantages occur compared to the method shown in FIG.

(1) When the car moves, the rope moves from the sheave groove due to the unbalanced load, causing a change in absolute position due to the rope crease 70.

(2) A change in absolute position occurs due to rope elongation 1 based on the car load.

(3) Pitch spring using a cage cart (Fig. 1 13)
Deformation of the rubber car floor rubber (Fig. 1, 14) causes a change in absolute position.

As a result, the position is incorrectly set to the open side 1, which causes the deceleration of the elevator speed side leg to change, resulting in a disadvantage that the landing control fW degree deteriorates.

As a countermeasure for this, there is a method in which a position detection switch is placed at a point in the hoistway and the position detected by the switch is pressed to the predetermined position of the switch. It is used. However, even with this method, you have to take the trouble to take the switch f=J. It was difficult and time-consuming to correct t= (generally, correction processing is performed by interrupting the microcomputer with each signal from a position detection switch installed in the hoistway).

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator position detection device that can simplify the overall system configuration and accurately correct and detect the elevator position.

[Overview of the invention]

The present invention e;
With the Hakugo, the sympathy code and the Kato load detector? υta iRJ sword 1 (rope extension sleeve iE based on Δ, the same rope creep correction and the pitch and floor t bend correction based on the above load (no.
The first sign is to do +i city.

Embodiment 3 Figure 3 shows one embodiment of the present invention (A (1), 1-segment air circuit structure 51'
, ,Figure T ,1).

The pulse encoder 15 shown in Fig. 2 also outputs @
is sent to the control 1i1 board 16 and the up/down counter 1
It is counted at 7 and is input to the microcomputer 19 via the manual buffer 18. 2θ is a load J2 detector, and a signal is inputted to the microcomputer 9 via an input buffer 18. In position 1, a typical position detection device 21 is shown as a destination for outputting the shield information.

The deceleration point signal &rr is sent to the J leg circuit 23 via the output buffer 22.

FIGS. 4(a) and 4(b) are processing flowcharts of the present embodiment 11, and show the processing in the microcomputer 19 of FIG.

Next, the effect of the tree 'j4/ilbdo1] will be explained.

FIGS. 5(a) and 5(b) are diagrams showing general characteristics of rope creep 1 and rope elongation, which are the basis of the present invention.

The rope creep amount is generally calculated as a function of the unbalanced load and the travel h'[111i1+. If it's a 10-story building, it's about 5.
The pharyngeal position ranges from 0 to 70 (varies depending on unbalanced sting, sheep shape, etc.).

Also, according to Hooke's law, the rope elongation sum is Δt=Kt(Δ
t: variation, ni: coefficient, t: total length), and is generally about ld' 50 trtn.

Similarly, the changes in the rope hitch and car floor rubber also change according to Hooke's law, and are each about 10 am.

If these change in the worst direction, the overall ranking will change by about 100 (for example, when the place is full, moving from the top floor to the lowest floor by <i units). This C) position σ) If you change your mind by tweeting, it will be 191Ii
There are no major changes in the position A (water device 2), etc. that displays the bed position, etc., but 1.11:, l/beta C] the basket ±
l Since it peaks at 17 degrees of landing at about Omm, σ) δ surface speed L
Et 1 lil starvation will cause a big problem. A) Since the speed point is inaccurate, the destination floor σ] Speed is 75 in front.
This may cause problems such as the elevator landing at a slow speed, prolonging the elevator operating time, or reaching the destination floor too far and having to land again (S1/bell). Therefore, it is always necessary to know the correct 751 and (U).

In other words, in Fig. 3, a rectangular wave (e pulse train) with a 90° phase shift generated by the Nockles encoder 15 is input to the cap 1 board 16, and the Atsuzo counter 17 adds and subtracts it (l+ll signal). If it rises, add snore 8
, in the case of a fall, decrease n). This count 1 shift of the counter 17 is set as the car position 48, and the microcomputer 19σ) fi + 400 million units of RAM is stored via the human buffer 18.
(random access memory) area (not shown). The signal from the load detector 20 is, for example, a signal of 30% of the maximum load, 60'%, etc., and is read from the manual buffer 18 into the microcomputer 19.
-60 inches, 60-100 inches can be judged. Of course, more precise loading conditions can be created by making the loading conditions more precise. Here, the position display device 21 merely shows a typical location-related destination of a signal outputted via the output buffer 22, and is not directly related to the gist of the present invention. The above-mentioned deceleration point signal is sent to the speed side diagonal circuit 13 via the output buffer 22, and the deceleration point is determined by this signal.

Next, processing within the microcomputer 19 will be explained.

Conventionally, in the conventional method, that is, the method shown in FIG. 1, as shown in the processing flowchart in FIG. The car position signal detected by the position detecting section consisting of the pulse encoder 15 and counter 17 is not subjected to any Ix correction processing.

As already mentioned, FIGS. 4(a) and 4(b) are processing flowcharts of this implementation. As mentioned above, this flowchart is for correcting rope elongation, rope creep, and correcting rope hitch and floor rubber deflection6.In order to keep the simple explanation to h1j, the discrimination is in three stages: dog, medium, and small. R57 is shown as a discrimination. In other words, from the up/down counter 12 of the sweetfish position detection section to the car position -
1 is read and the car load is determined from the output of the load detector 20 in three stages: large, medium, and small. The car load factor is Ll
, L2. This will be the basis for L3. Next, regarding the change in Roso length due to running, for example, if you are going upwards from the first floor, you can subtract the candy corresponding to the car position from the total length, and check whether the ffff is 2/3 or more of the total length, or 273 to 1/3 or 1/3 to 0, directly dividing into large, medium, and small R1, R2, and R3.

Next, the above car load coefficients L1 to L3 and rope lengths R1 to R3
Correct the value of . 3 types of this occasion,
There are three types of nine m combinations, and the combination of Ll, R] is the largest. Calculation of correction value (t) Specifically, for example, a predetermined correction value for the elevator system may be selected based on this combination. Next, regarding rope creep, Upper J[2 judges the travel distance from the position signal.

If ρl, the distance moved in 1 second is dog, medium,
Decide on C1, C2, and C3. The rope creep caused by the characteristics of the elevator system is calculated and corrected by one shift of the travel distances C1 to C3 per hour and the above-mentioned loads L1 to L3. Next, Hooke's law determines changes in the bridge springs and bed combs due to load, so all you have to do is correct that shift.

Although the above changes were comprehensively corrected and read in first, the accurate position can be detected by correcting the position signal and using the value of 7 for position calculation.

Therefore, a positive 4i (#) minus 3 points is obtained, and the fiV degree is 〇〈 (the present invention is a more reliable position correction method with a high n'i degree, which is used in conjunction with the correction method using direct signals. The gist of this document can be modified and implemented within a reasonable range.

[Effect of the invention] According to the present invention) 1. It is possible to provide an elevator car position detecting device capable of detecting a car position with high wear and tear by modifying the position manpower [1] with a simple system configuration.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a conventional general elevator system, FIG. 2 is a configuration diagram of main parts of a system to which an embodiment of the present invention is not applicable, and FIG. 3 is a circuit diagram of an embodiment of the present invention. A block diagram showing the configuration, FIGS. 4(a) and (b) are processing flowcharts in the same implementation, and FIGS. 5(a) and (
b) is a diagram showing the amount of rope creep and the It'# characteristic of rope elongation, which is beyond the scope of a detailed explanation of the present invention; Encoder, 16...control t'l
l, 'AIE, J7...up/down counter, 1
8...Iruka no Kutsufa, 19...Micro Combi,
4-ta (microcomputer), 20...load detector, 2-no...
・Position display device, 22... Output buffer, 23...
Speed collateral circuit. 1-[琲 ``Single Agent Patent Attorney Takehiko Suzue 1st
Figure 3 Figure 5 (a) (b) Figure 6

Claims (1)

[Claims] Detects the rotation of the elevator drive motor and calculates the ratio ρ to the amount of rotation.
a load detector that detects the car position signal obtained by the position detection unit; a load detector that detects the car load; and a rope that determines the length of the hanging rope for the car based on the car position signal obtained by the position detection unit. a length determining means; a rope elongation calculation means for calculating a rope elongation correction candy based on the rope length determined by the means and the car load detected by the load detector;
a traveling distance determining means for determining a car traveling distance based on a car position signal obtained by the position detecting section; and a rope creep based on the traveling distance determined by this means and the car load detected by the load detector. a low-so-creezo calculation means for calculating a correction weight, a hitch and a floor η11 stage for calculating a correction pupil for a load-induced load, a change in floor position based on the car load detected by the load detector, and a floor η11 stage, and the rope elongation. Correction 1st shift, rope creep correction [shift and hitch, correct car position 11 (by correcting the row signal) obtained by the position detection section based on the correction 11G obtained by the floor calculation means. An elevator position calibration device characterized by comprising initialization means.