JP2738393B2 - Failure determination method for elevator position detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the presence or absence of a failure of a position detector for detecting the current position of a car according to the position of a plate installed inside a hoistway corresponding to each layer of a building. It relates to the failure determination of the position detector of the elevator to determine, specifically, to determine whether there is a failure of the position detector using the time the position detector passes through each plate, and to notify the outside, The present invention relates to a method for judging a failure of an elevator position detector so that an operation supervisor of an elevator can take appropriate measures.

[0002]

2. Description of the Related Art In general, in an elevator operation control device, as shown in FIG.
7 which is rotated by the drive of drive 7
15, an elevator car 11 connected to the sheave 15 with a rope and moving up and down in accordance with the rotational movement of the sheave 15, a counterweight 16, and a pulse for generating a pulse proportional to the rotational speed of the electric motor 17. A generator 18; a counter 19 for counting and outputting the number of pulses generated by the pulse generator 18; and a counter 19 installed above the elevator car 11 and installed inside the hoistway corresponding to each layer of the building. A position detector 13 for detecting the position of the plate 12, and a counting value of the counting unit 19 to calculate a moving distance of the elevator car 11 to comprehensively control the system, and a detection result of the position detector 13. And a control unit 20 for judging a failure of the position detector and controlling the entire system, and a warning light 21 and a failure light 22. Display unit 23 which outputs the result to the outside
And it was composed of

Further, in the control unit 20, as shown in FIG.
AM28 and ROM27 in which the operation program is stored
And an input interface 25 and an output interface 26 that are in charge of inputting and outputting data to and from external devices, and receive and process the data in the RAM 28 and the ROM 27 and the data input from the input interface 25, and output the result to the output CP output to interface 26
U24.

[0004] The operation of the general elevator operation control device configured as described above will be described.

First, when the sheave 15 is driven by the electric motor 17 and the elevator car 11 travels to the target layer, the pulse generator 18 generates a pulse proportional to the rotation speed of the electric motor 17, and the counter 19 generates the pulse. Is counted and supplied to the control unit 20. Next, the control unit 20 calculates the moving distance of the elevator car 11 from the counted number of pulses, compares the calculated moving distance with the moving distance of the elevator car 11 preset in the internal ROM 27, and then calculates the moving distance of the elevator car 1.
The location of the first door to be opened is determined and a door open signal is output.

Further, while the elevator car 11 is running,
Position detector 1 installed above the elevator car 11
The position of 3 is the plate 12 installed inside the hoistway of each layer.
, The control signal os is supplied to the control unit 20, and the control signal os is supplied to the CPU 24 via the input interface 25 inside the control unit 20.
In this case, if the control signal os is on, the CPU 24 determines that the elevator car 11 has arrived at the expected arrival layer and outputs a door open signal.

However, if the moving distance of the elevator car 11 is incorrectly calculated due to external factors, or if the position detector 13 is out of order, the elevator car 11
Door is opened at an incorrect position, which poses a problem that there is a danger to the safety of the passengers in the elevator car 11.

Conventionally, in an elevator position detector failure determination device which solves such a problem, as shown in FIG. 5, the current position of the elevator car 11 is detected according to the position of the plate 12. A position detector 36;
According to the rotation of the electric motor 17, the elevator car 11
A position calculation unit 31 that calculates the position of the vehicle, an error calculation detection unit 32 that detects the presence or absence of an erroneous calculation according to the time from the deceleration start time to the stop time in the stop operation of the elevator car 11, and Remaining distance calculation unit 33 for detecting the remaining distance to the expected arrival layer according to the calculation result
A location detector 34 that calculates each location according to the detection operation and non-operation of the position detector 36 according to the calculation result of the remaining distance calculator 33, and a detection result of the position detector 36 And a failure detection unit 35 that detects the presence or absence of a failure by detecting in accordance with the detection result.

Referring to FIG. 6, the operation of the conventional apparatus for determining a failure of a position detector of an elevator constructed as described above will be described.

First, when the arriving layer of the elevator car 11 is determined, the position calculating section 31 calculates the layer height value of the arriving layer from the table of the layer height values of each layer stored in the ROM 27. The remaining distance calculation unit 33 calculates the remaining distance according to the difference between the layer height value and the current position of the elevator car 11. Next, as described above, the moving distance of the elevator car 11 is counted via the electric motor 17, the pulse generating unit 18, and the counting unit 19, and the remaining distance is sequentially reduced. The speed of the elevator car 11 is adjusted by receiving a reference speed command from the table in the ROM 27, and the elevator car 11 is transported to the scheduled arrival layer.

The elevator layer position data is RA
M28, and the layer position data of the elevator is stored in the RAM 28 and the read position data due to an external noise and an error of the pulse generator 18 including an encoder (not shown) when the power is turned on / off. The difference between the data and the selected data is called “selector mismatch”. If the expected arrival layer is set incorrectly, or if the current position of the elevator car 11 is incorrect and the selector mismatch occurs, the remaining distance is trusted. The error calculation detection unit 32 detects whether the selectors do not match (S41), and determines whether the selector is normal (S42). Thereafter, if the selector is not normal, the failure judgment of the position detector 13 is invalidated (S4).
7) If the selector is normal, the position detector 13
Is determined. That is, the remaining distance obtained in this manner is calculated (S43). If the remaining distance is within a predetermined range from 1050 mm to 1350 mm from the bottom surface (S44), the control signal os is turned on. If the control signal os is ON, it is determined that the position detector (13) is faulty (S46), and the restart of the elevator is disabled.

That is, conventionally, the failure determination method of the elevator position detector uses the elevator car 1 by the remaining distance calculation.
The distance from the first arrival layer is calculated, and a failure is determined by using the fact that the position detector 13 is not in the ON state in the predetermined detection section of 1050-1350 mm before the arrival layer.

[0013]

However, in such a conventional method for judging a failure of an elevator position detector, a predetermined detection section before the arrival layer is 1050-135.
A failure is determined only by 0 mm, and no failure is determined in other sections excluding the section. Therefore, 1050-135
In a section other than 0 mm, there is an inconvenience that a failure is not determined.

An object of the present invention is to determine an abnormal state of the position detector every time the position detector of the elevator car passes the plate of each layer, and to detect the failure of the position detector in all the layers where the elevator is operated. It is an object of the present invention to provide a method for judging a failure of an elevator position detector, which can judge a failure.

[0015]

According to the method for determining a failure of an elevator position detector according to the present invention, the position of the elevator car is determined within a first predetermined time after the elevator car departs from a starting layer to a destination layer. A first step of displaying a warning to the outside if the detector does not leave the plate of the starting layer, and a second predetermined time after the position detector enters a plate of an arbitrary layer between the current layer and the target layer. A second step of displaying a warning to the outside if the plate does not escape, and an outside if the time elapsed from when the position detector enters the plate in the second step and escapes is shorter than a third predetermined time. A third stage of displaying a warning, a fourth stage of displaying a failure externally when the number of times of displaying a warning is repeated a plurality of times in each stage, and the number of preset layers when an elevator car arrives at a target layer. And actually d After comparing the number of layers operated by the beta car, if the numbers are different from each other, an external warning is displayed, and if the number of times of displaying the warning is repeated a plurality of times, a fifth step of displaying an external failure is sequentially performed. It has become.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2, 3, 4, and 7. FIG.

When a passenger registers a call of a lower layer or an upper layer, which is a target layer in the current layer, the call is input to the CPU 24 through the input interface 25 of the control unit 20 of FIG. You. Next, the CPU 24 processes the data stored in the RAM 28 and supplies a trajectory command to the electric motor 17 of FIG. In this case, the control signal o input through the input interface 25
One cycle that has elapsed until s is processed and output to the output interface 26, that is, the execution time of the program is 50 ms.

Thereafter, the elevator car 11 is started in accordance with the start command and moves to the target layer. During the movement to the target layer, the position detector 13 installed above the elevator car 11 detects the position of the plate 12. To detect. FIG.
Shows the waveform of the control signal os applied to the CPU 24 by the position detector 13 detecting the position of the plate 12, and taking the case where the elevator car rises as an example. When the upper position detector 131 of the detector 13 enters the plate, it is in a high state, and when the lower position detector 132 escapes the plate, it is in a low state. Of the high state is determined.

Further, as the elevator car 11 is driven to accelerate at departure, to full speed thereafter, and to deceleration at arrival,
The high-level control signals 1F, 4F of the start layer and the arrival layer
Is the high-level control signal 2 for any section located between
Wider than F and 3F.

When the time required for the position detector 13 to pass through the starting layer plate by the activation of the elevator car 11 is determined, the acceleration of the elevator car 11 increases for 0.8 seconds after departure, and thereafter, Has a predetermined value,
Here, for convenience of calculation, assuming that the acceleration is 0.8 m / s ² , the elevator car 11 has the acceleration of 0.8 m / s ^2.
When moving to the acceleration of s ² , the time t when the position detector 13 passes through the starting layer plate which is about 2500 mm away from the bottom surface is a relational expression between the acceleration a and the length s of the end of the plate. It can be obtained from 1.

[0021]

(Equation 1)

When the elevator car 11 operates normally, it passes through the starting layer plate at about 0.7 seconds of the 0.66 seconds. Therefore, in order to ensure safety, the above-mentioned 0.
A time t1 that is twice as long as 7 seconds is set as a new time,
If the position detector 13 does not pass through the starting layer plate within 1.4 seconds of the time t1, the CPU 2 of the control unit 20
Reference numeral 4 turns on the warning lamp 21 of the display unit 23 to externally display that the position detector 13 has an abnormality.

In addition, when the time required for the position detector 13 to pass through the starting layer plate within the time t1 and then to pass through the plate of the next layer is determined, the elevator car 1
1 is 4 m / s, the time t2 when the position detector 13 passes through the next layer plate having a length of 0.35 m is

(Equation 2) It is. That is, the time t2 is set to the elevator car 1
1 is set to the minimum time during which the position detector 13 travels normally and passes the plate of the next layer.

Also, when the elevator car 11 travels at full speed after departure, that is, when passing through the plate of the next layer while traveling at the acceleration of 0.8 m / s ² ,
Although the transit time is considerably delayed from 0.0875 seconds of the time t2, the transit time is obtained by calculating the velocity v at the time of passing by the following equation 3 and then by the following equation 4.

(Equation 3) It is. That is, the value obtained by multiplying the time t by 2 is about 0.0.
35 seconds is set as the maximum time t3 during which the position detector 13 passes through the plate of the next layer.

Therefore, the position detector 13 passes through the plate before the time t2 after the position detector 13 enters the plate of the next layer, or the position detector 13 keeps moving even after the time t3 has elapsed. If the plate does not escape, it means that the elevator car 11 did not run normally, so the CPU 24 turns on the warning lamp 21 of the display unit 23 to notify the position detector 13 that there is an abnormality. To be displayed.

When the warning light 21 is displayed a plurality of times, the CPU 24 turns on the failure light 22 of the display unit 23 to indicate to the outside that the position detector 13 has a failure.

Hereinafter, a method of determining the position of the position detector 13 using the plate will be described in detail with reference to FIG. 1. OFFTIME, which will be described later, is the minimum time that elapses before the elevator car 11 escapes the starting layer plate. A value corresponding to t1 is indicated, and NOTTIME indicates a value corresponding to the time of passing through any layer after the starting layer.

First, when the elevator car 11 is not operated, it is not a high-speed automatic operation, so that step S1 is not satisfied.
Accordingly, the value DZSU is initialized to '0' in step S15, the value ONTIME is initialized to '0' in step S18 through step S16, and the value OFFTIME is set to the time t.
It is initialized to '28 periods' corresponding to 1 (S18).

Thereafter, when the elevator system operates in a normal state and the elevator car 11 starts to operate,
Since the current operation state is the high-speed automatic operation state, step S1 is satisfied. If the position detector 13 does not escape from the current starting layer plate through steps S2, S3, and S4, step S5.
In step S10, the value OFFTIM is not satisfied.
One cycle is subtracted from E, and the value OFFTIME becomes 27 cycles.

Next, in the next step S11, the value OFFT
Since the IME does not satisfy “0”, the process is returned. Thereafter, the process is repeated until the position detector 13 exits the starting layer plate, and the value OFFTIME is repeated.
Is reduced, and when the value OFFTIME becomes '0' in step S11, step S19 is performed. In this case, since the position detector 13 does not pass through the starting layer plate within the time t1, as shown in FIG. 2, the value Err is increased by “1” in step S71, and the value of the external error is increased through step S72. Is displayed (S74).

Next, when the position detector 13 enters the second plate (not shown), the value O is determined in step S6.
NTIME is compared to '7', where '7' is the maximum value t3 of any plate transit time between the starting and arriving layers,
The value ONTIME currently being '0' is increased by '1' in step S7 to satisfy step S8, and in step S9 the value DZ
SU becomes '1'. In this case, the value DZSU is a value that is incremented by '1' each time the position detector 13 enters the remaining plate excluding the starting layer plate,
The number of layers through which the elevator car 11 passes is shown.

Thereafter, if the position detector 13 does not pass through the second plate until the value ONTIME becomes larger than '7', a step S19 is carried out through a step S6 and a warning is displayed outside (S74). In this case, as described above, it means that the position detector 13 does not pass through the plate within the maximum time t3.

Next, if the position detector 13 escapes from the second plate, step S3 is not satisfied, so that it is determined in step S16 whether the value ONTIME is "1", and the result of the determination is "1". If it is larger than the next step S1
8 and if it is '1', a warning is displayed externally by performing step S17 (S74), indicating that such a passage time is shorter than the minimum time t2 of the plate passage.

Finally, when the position detector 13 enters the arrival layer plate, step S4 is satisfied, and step S12 is completed.
Sets the difference between the departure layer and the arrival layer to a new value FL. In step S13, it is determined whether the value obtained by subtracting the set value FL is the same as the value DZSU. Is displayed (S74), and if they are the same, the process returns. In this case, the departure layer and the arrival layer in step S12 are stored in the RAM 2 of the control unit 20 when the user registers the call.
8, the value DZSU indicates the number of arbitrary layers through which the position detector 13 passes.

Step S72 in FIG. 2 shows that the position detector 13 cannot escape from the starting layer plate continuously. If the number of times is more than five, step S72 is satisfied and external failure occurs. It is displayed (S73).

[0036]

As described above, in the method for judging a failure of an elevator position detector according to the present invention, after a normal time for an elevator car to depart from a departure layer and pass through each layer is set, the time is determined. Compare the set time, the time when the actual position detector entered the plate of each layer, and the exit time, respectively, and judge the failure of the position detector in all layers where the elevator is operated, and the safety of elevator operation There is an effect that can be improved.

[Brief description of the drawings]

FIG. 1 is a flowchart of an elevator position detector failure determination method according to the present invention.

FIG. 2 shows the subrutin (S19) (S14) (S1) of FIG.
It is a flowchart of 7).

FIG. 3 is a configuration diagram of a general elevator operation control device.

FIG. 4 is a configuration diagram of a control unit of FIG. 3;

FIG. 5 is a configuration diagram of a conventional failure determination device for an elevator position detector.

FIG. 6 is a flowchart of a conventional method for determining a failure of an elevator position detector.

FIG. 7: A position detector detects the position of the plate and the CPU
2 shows a waveform of a control signal applied to the control signal.

[Explanation of symbols]

 Reference Signs List 11 elevator car 12 plate 13 position detector 15 sheave 16 counterweight 17 motor 18 pulse generator 19 counting unit 20 control unit 21 warning light 22 failure light 23 display unit 24 CPU 25 input interface 26 output interface 27 ROM 28 RAM 131 upper side Position detector 132 Lower position detector

Claims (8)

(57) [Claims] A first step of displaying a warning to the outside if the position detector of the elevator car does not escape the plate of the starting layer within a first predetermined time after the elevator car has departed from the starting layer to the destination layer; A second step of displaying a warning to the outside if the position detector does not escape from the plate for a second predetermined time after entering the plate of an arbitrary layer between the current layer and the target layer; and A third step of displaying a warning to the outside if the time elapsed from entering the plate in the second step to exiting the plate is shorter than a third predetermined time; and a preset layer when the elevator car arrives at the target layer. A fourth step of comparing the number of elevator cars with the number of layers actually operated by the elevator car and, when different from each other, displaying an external warning, sequentially performing a failure determination of the elevator position detector. 2. The method according to claim 1, further comprising adding a fourth step of displaying a failure externally when the number of times a warning is displayed at each step is repeated a plurality of times. 3. The method according to claim 2, wherein the number of repetitions for displaying the warning is five. 4. The elevator according to claim 1, wherein the first predetermined time is twice as long as a time when the position detector of the elevator car passes through the plate of the starting layer in coincidence with the elevator car moving at a predetermined acceleration. How to judge the failure of the position detector. 5. The method according to claim 4, wherein the time required for the position detector to pass through the plate of the starting layer is 0.7 seconds. 6. The second predetermined time is twice as long as the time when the elevator car travels at a predetermined acceleration and passes through a plate of the next layer before traveling at full speed after departure. For determining the failure of an elevator position detector. 7. The method according to claim 6, wherein the time required to pass through the plate of the next layer is 0.175 seconds. 8. The method according to claim 1, wherein the third predetermined time is a time when the position detector passes a plate of an arbitrary layer between a starting layer and an arriving layer when the elevator car 11 runs at full speed. A method for determining the failure of an elevator position detector.