JPH062556B2 - Elevator control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an elevator control device that enhances safety of an elevator.

[Prior Art] This kind of conventional elevator control device judges whether or not the door can be opened between floors so that the door can be opened if the door can open. It is a structure that opens the door, and it can be opened by a plate provided on each floor and a position point switch attached to the car, similar to the position detector disclosed in JP-A-56-12283. It detects the zone and opens the door.

The above-mentioned conventional device is shown in Fig. 2. In the same figure, (11) is a car, (12) is a balance weight with this car (11),
It is fixed to both ends of (13). (14) is a sheave, around which a rope (13) is wound. (15) is a motor that drives the sheave (14), (16) is a pulse generator that is connected to the motor (15) and generates a pulse proportional to the rotation speed of the motor (15), and (17) is a pulse generator. A counting circuit that counts the number of pulses generated from the generator (16), and (18) is an electronic computer.For example, by reading the count value (17a) of the counting circuit (17) and performing a calculation, the movement in each calculation cycle is performed. Calculate the distance.

In the conventional elevator controller thus configured, the sheave (14) is driven by the motor (15) and the car (11) is driven.
Drives to the destination floor. At this time, for some reason, the basket (11)
If it stops between the floors, the openable zone is detected so that the door will not open in such a state. A door openable signal (19a) is input to the computer (18) by the plate (20) provided on each floor and the position point switch (19) provided on the car, and this signal (19a) is turned on. At this time, it is judged that the zone is open and the door is opened.

[Problems to be Solved by the Invention] Since the conventional elevator control device is configured as described above, the door can be opened when the door openable signal (19a) is turned on, and the position point switch which is the position detecting means. When (19) is on failure, there is a problem that the door openable signal (19a) is always on, and the car is opened even though the car stops between floors.

The present invention has been made to solve the above problems, and by detecting the failure of the position detecting means,
The purpose is to improve the safety of the elevator.

[Means for Solving Problems] The elevator control device according to the present invention detects the current position of the car by the position detecting means based on the positions of the plates installed in the hoistway corresponding to a plurality of floors. Then, the car position is calculated by the car position calculating means, and the zone of the detection operation / non-operation of the position detecting means is calculated by the zone detecting means on the basis of the calculation result of the car position calculating means. The detection result is inspected on the basis of the calculation result of the zone detection means, and the presence or absence of a failure of the position detector is detected by the failure detection means.

[Operation] The failure detecting means according to the present invention performs the operation of the position detecting means for detecting the current position of the car based on the position of the plate,
The failure is detected based on the calculation result obtained by the car position calculation means from the rotation value of the elevator driving motor.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows a circuit block diagram of an elevator control device according to this embodiment, and FIG. 2 shows a system configuration diagram of an elevator device using the elevator control device of FIG.
In each of the above figures, the elevator control device according to the present embodiment is position detection means (6) for detecting the current position of the car based on the position of the plate (20) installed in the hoistway corresponding to a plurality of floors. And the position detection means (1) that calculates the car position by the rotation of the motor (15) that winds and lowers the car in the hoistway, and the calculation results obtained by the calculation of the position detection means (1). Incorrect operation detection means (2) that detects the presence or absence of incorrect operation based on the time from the deceleration start to the stop in the car stop operation, and the floor to the floor to be landed based on the operation result of the car position detection means (1) The remaining distance calculation means (3) for detecting the remaining distance of the position switch (19) and the zone detection means (4) for calculating each zone of operation / non-operation of the position switch (19) and the detection result of the position switch (19). Inspection based on the calculation result of the zone detection means (4) above to check for any failure. And a failure detecting means (5) for outputting, and the presence or absence of a failure of the position detecting means (6) is invalidated based on the detection result of the erroneous operation detecting means (2).

The operation of this embodiment based on the above configuration will be described with reference to FIGS.

FIG. 3 shows a switch ON failure detection flowchart according to this embodiment, FIG. 4 shows a selector deviation detection flowchart (detailed view of procedure (21)), and FIG. 5 shows a speed waveform chart at the time of selector deviation. In the figure, car position detection means
Based on the calculation result of (1), the remaining distance to the floor to be landed is calculated by the remaining distance calculating means (3). When the floor to be landed on the car is determined, the above-mentioned remaining distance is extracted from the floor height value table of each floor stored in advance, and the remaining distance is calculated by the difference between this and the current position of the car. Set. After that,
The moving distance of the car is counted by the electronic computer (18) of the motor (15) → pulse generator (16) → counting circuit (17), and the remaining distance is gradually reduced. Then, the reference speed command corresponding to this gradually decreasing remaining distance is extracted from the ROM table, and when the landing switch on the floor to be landed detects 15 mm in front of the floor,
Enter the implantation sequence.

Based on this remaining distance, an inoperative position of the position detector, that is, a zone in which the signal of the position switch (19) is normally off is detected, and if the output of the position switch signal in this zone is on, it is determined to be a failure. (Fault detection zone after the floor
I will proceed with the story as 1350mm ~ 1050mm. ) In addition, this failure check is performed based on the remaining distance, but if the planned floor to land on is set incorrectly or the current position of the car is abnormal (these are referred to as selector shifts hereafter). The remaining distance itself is unreliable and there is a risk that the position switch (19) failure check may be erroneously detected.
Therefore, is the selector misaligned?
If it is detected by, and the selector is deviated, the failure check is invalidated.

In other words, (a) when the selector is normal, the position switch (19) is checked for failures, and when (b) the selector is abnormal, the position switch (19) is checked for failure to prevent erroneous detection, and based on each control. To improve safety.

Next, the failure determination of the position detector will be described in detail. The remaining distance calculated by the remaining distance calculation procedure (23) is 1350 mm to 10
When it is 50 mm, the failure of the switch signal is judged in step (25) .When the switch signal is on, the position switch
(19) determines that there is a failure.

Also, if the selector is misaligned, follow the procedure (2
The selector shift is detected in 1), and when the selector is abnormal, the failure check of the position switch (19) is invalidated.

The selector shift detection will be described below. It is assumed that the car (11) is driving up, with the K floor as the landing floor. If the selector shift occurs at this time, the velocity waveform becomes as shown in FIG. Therefore, when the selector shifts in the figure,
The vehicle starts decelerating faster due to an incorrect remaining distance, and even if the remaining distance becomes 0, the position point 15 mm in front of the floor cannot be detected, so the reference speed command continues to run at a constant low speed. After detecting 15mm, enter the landing sequence. The vehicle will start decelerating faster due to an incorrect remaining distance, and will land on the K floor at a low speed thereafter. Therefore, the deceleration time becomes longer than in the normal state.

That is, in the procedure (32) of FIG. 4, the deceleration time T1 is counted, and when the deceleration time T1 becomes equal to or more than the constant value CON1, it is determined that the selector is displaced.

Next, the operation of the fault detection means (5) for fault erroneous detection will be described.

If the selector is misaligned, deceleration is started due to an erroneous remaining distance, and for example, as shown in FIG. 5, the electronic computer ( It is assumed that the remaining distance that is mistakenly recognized by 18) was 1350 mm to 1050 mm. At this time, the door openable signal is on and the position switch (1
False detection of 9) is faulty. In this way, in order to prevent false detection of the ON failure of the position switch when the selector is displaced, the failure check is invalidated when the selector is displaced (procedure (27)).

In the above-described embodiment, the selector deviation is determined based on the deceleration time, but this may be replaced with (i) the reference speed command and (ii) the deceleration distance.

The case based on the reference speed command is shown in FIG. 6, and the case based on the deceleration distance is shown in FIG.

(i) The method of detecting the selector deviation by the reference speed command is to drive the floor level at low speed until the floor level is detected when the selector is displaced (see Fig. 5). T2 is counted (procedure (43)), and when the low speed traveling time T2 becomes equal to or more than the constant value CON2, it is determined that the selector is displaced.

(ii) In the selector deviation detection method based on the deceleration distance, the distance from the deceleration start at the selector deviation to the landing is longer than in the normal state, and therefore the moving distance DPSI for each calculation cycle is added from the deceleration start (procedure ( 52)), and the total value DIS is the specified value DIS1.
When the above is reached, it is determined that the selector is displaced.

Further, in the present embodiment, the case of the failure check of the door openable zone detection position switch has been described, but (i) the landing switch for the landing sequence detects the front floor ± 15 mm (starting point of the landing sequence, Used as the operating point of the brake).

(ii) The floor level switch for writing the floor high price detects the zone from 225 mm above the floor to 225 mm below the floor (above the floor 22
5 、 Underfloor 225 is detected. ).

(iii) The position switch for floor alignment is 75 mm above the floor to 7 below the floor.
5mm zone detection (detects possible zone area of floor alignment operation).

The same effect is achieved in each of the above cases.

In the above embodiment, when the position detector is detected to be faulty, the elevator cannot be restarted to improve safety. When the selector shifts, the malfunction detection means (2) resets the failure detection means (5) to enable normal operation thereafter.

[Effects of the Invention] As described above, the elevator control device according to the present invention includes position detection means for detecting the current position of the car based on the positions of the plates installed in the hoistway corresponding to a plurality of floors, A car position calculating means for calculating a car position based on the movement of the car, a zone detecting means for calculating a detection operation / non-operation area of the position detecting means based on a calculation result of the car position calculating means, and the position detecting means. The detection result of the position detecting means is inspected based on the calculation result of the zone detecting means, and the structure is provided with a failure detecting means for detecting the presence or absence of a failure of the position detector. Therefore, it is possible to improve the safety of the elevator.

[Brief description of drawings]

FIG. 1 is a circuit block diagram according to an embodiment of the present invention, FIG. 2 is an elevator system configuration diagram, FIG. 3 is a position switch ON failure detection flowchart of the present invention, and FIG. 4 is a selector shift detection flowchart. FIG. 5 is a velocity waveform diagram at the time of selector deviation, FIG. 6 is a selector deviation detection flowchart of another embodiment, and FIG. 7 is a selector deviation detection flowchart of another embodiment. In the figure, (1) is the car position calculation means, (2) is the erroneous calculation detection means, (3) is the remaining distance calculation means, (4) is the zone detection means, (5) is the failure detection means, and (6) is It is a position detecting means. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] 1. An elevator control device for controlling a car of an elevator traveling between a plurality of floors, wherein a current position of the car is determined based on a position of a plate installed in a hoistway corresponding to the plurality of floors. A position detecting means for detecting, a car position calculating means for calculating a car position based on the movement of the car, and a zone for calculating a detection operation / non-operation area of the position detecting means based on a calculation result of the car position calculating means. An elevator comprising: detection means; and failure detection means for inspecting the detection result of the position detection means based on the calculation result of the zone detection means to detect the presence or absence of a failure of the position detector. Control device. 2. The car position calculating means comprises erroneous operation detecting means for detecting the presence or absence of an erroneous operation based on a time from a deceleration start time to a stop time in a car stop operation, based on an operation result obtained by the operation. The elevator control apparatus according to claim 1, wherein when the erroneous operation detecting means detects an erroneous operation, the detection result of the failure detecting means is invalidated. 3. The car position calculating means is configured to calculate the car position based on the rotation value of a motor for winding up and down the car in the hoistway. The elevator control device according to item 2.