KR20190007471A - Control device and control method of elevator - Google Patents

Abstract

The present invention relates to an elevator for a car, comprising: a layered position detecting unit for detecting a layered position by detecting a concealing plate provided at a layered position in a hoistway with a concealment plate detector provided in the car; A driving control section for performing a floor height learning operation for an elevator car in the floor height learning, and a control section for measuring the floor height by the moving distance of the elevator car detected in the floor height learning operation And the drive control unit is an elevator control device or the like that at least passes through the elevating plate at the lowest level during the hoistway learning operation to pass the elevator car through the elevator car at a constant speed.

Description

Control device and control method of elevator

The present invention relates to a control apparatus and a control method of an elevator, and more particularly to a more accurate measurement of the bed height between layers.

In a conventional rope-type elevator, a landing plate provided at a position corresponding to the stop layer of the car in a hoistway, and a position detecting means for detecting the position of the car based on a rope provided on a governor or a hoisting machine, In addition to the information obtained from the floor height information, the remaining distance to the stopping floor is calculated, and conception control of the elevator car is performed.

In order to realize a high-precision conception, accurate elevation information is required. Therefore, the layer height is learned by using the information obtained from the fusing plate and the position detecting means (see, for example, Patent Documents 1-3 and the like).

[Patent Document 1] Japanese Unexamined Patent Application, First Publication No. 60-197572 (Fig. 1)

[Patent Document 2] JP-A-2-106574

[Patent Document 3] International Publication No. 2016-063379 pamphlet

However, in the prior art, since the measurement error of the rope stretching caused by the acceleration / deceleration of the car is included in the floor height measurement data of the terminating layer, in particular, the lowermost layer in which the rope becomes long, It becomes difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an elevator control device and a control method thereof, which can eliminate the influence of rope stretching due to acceleration / deceleration and enable accurate learning of floor height when performing rope learning using a governor rope or a main rope And to provide a control method.

The present invention relates to an elevator for a car, comprising: a layered position detecting unit for detecting a layered position by detecting a concealing plate provided at a layered position in a hoistway with a concealment plate detector provided in the car; A driving control section for performing a floor height learning operation for an elevator car in the floor height learning, and a control section for measuring the floor height by the moving distance of the elevator car detected in the floor height learning operation And a storage unit for storing the measured layer height, wherein the drive control unit is an elevator control unit that at least passes through the elevator car at the lowest level during the floor height learning operation at a constant speed.

In the present invention, it is possible to learn the FWHM without being affected by the elongation and contraction of the rope by controlling the terminal layer, in particular, the lowermost fritting plate to pass through the car at a constant speed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram schematically showing an overall configuration of an elevator control apparatus according to Embodiment 1 of the present invention. Fig.
Fig. 2 is a view for explaining an elevator car running control at the time of floor level learning by control of the control processing device in the first embodiment of the present invention. Fig.
3 is a view for explaining an elevator car running control for floor height measurement of the lowest floor in the floor height learning by the control of the control processing apparatus according to the first embodiment of the present invention.
4 is a diagram showing an example of the internal configuration of the measurement processing section according to Embodiment 1 of the present invention.
5 is a diagram schematically showing the overall configuration of an elevator control apparatus according to Embodiment 2 of the present invention.
Fig. 6 is a view for explaining an elevator car running control at the time of floor level learning by control of the control processing device in the second embodiment of the present invention. Fig.
7 is a view schematically showing the overall configuration of an elevator control apparatus according to Embodiment 3 of the present invention.
Fig. 8 is a view for explaining an elevator car running control at the time of floor level learning by the control of the control processing device in the third embodiment of the present invention. Fig.
9 is a schematic configuration diagram of an example of a case where a control processing apparatus of the elevator control apparatus of the present invention is constituted by a computer.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a control apparatus and a control method of an elevator according to the present invention will be described with reference to the accompanying drawings. In each embodiment, the same or equivalent portions are denoted by the same reference numerals, and redundant description is omitted.

Embodiment 1

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram schematically showing the overall configuration of an elevator control apparatus according to Embodiment 1 of the present invention. FIG. In the elevator, an elevator car 1 for riding passengers is provided at one end of the main rope 2, and a counterbalance 3 is provided at the other end. The main rope 2 is caught by the hoisting machine 4 and hoists or lifts the main rope 2 by the hoisting machine 4 to raise and lower the car 1 and the counterbalance 3 in opposite directions.

The elevator car (1) is provided with a governor (5). The governor 5 is constituted by a loop shaped governor rope 5a with a part of the car 1 secured thereto and an upper and lower governor sheaves 5b with a governor rope 5a interposed therebetween. In the governor 5, for example, a revolution number detector 6 for detecting the revolution number composed of an encoder or the like is provided, and the revolution number NRO is outputted. The rotation number detector 6 may be provided on the traction machine 4 as indicated by a broken line. The rotation number detector 6 is not shown in the other drawings of the present application.

In the inside of the hoistway, a conception plate 7 is provided at a position corresponding to a conception zone on each layer. On the respective layers, the conception plate 7 may be provided with a plurality of door zones such as a door zone allowing the doors to be opened and closed, a re-level zone permitting the re-level, and the like.

The conception plate detector 8 is installed in the car 1 for detecting the conception plate 7. When a plurality of kinds of the conception plate 7 are provided such as a door zone and a re-level zone permitting a re-level, a conception plate detector 8 is provided for each type. The elevator car 1 on which the conception plate detector 8 is mounted moves and comes to a position equivalent to the height of the concealment plate 7 so that the concealment plate detector 8 faces the concealment plate 7, 8 detect the conception plate 7 and output the conception plate detection signal PDS. The concealment plate detector 8 detects one of both ends of each of the fusing plates 7 along the advancing direction of the car 1 as described later and counts the number of rotations NRO from the rotation speed detector 6 It becomes a measurement point.

The control processing apparatus 9 according to the first embodiment of the present invention includes a measurement processing unit 10, a storage unit 11, and a drive control unit 12. [

The control processing device 9 can be constituted by, for example, a computer 100 having a schematic configuration shown in Fig. Input / output is performed through the interface 101. [ The memory 103 stores in advance the programs and functions necessary for the various functions indicated by functional blocks for control and the like to be described later, and the like, and the processing results and the like are additionally stored. The processor 102 performs arithmetic processing on signals input through the interface 101 according to various programs, information, and data stored in the memory 103 to output the processing results through the interface 101, The process, and the processing result are stored in the memory 103. For example, the various functions represented by the blocks of the measurement processing unit 10 and the drive control unit 12 shown in Fig. 1 are stored in the memory 103 as a program. The storage unit 11 corresponds to the memory 103. [

The control processing unit 9 can also be constituted by one or a plurality of digital circuits for executing various functions represented by blocks of the measurement processing unit 10 and the drive control unit 12 described later.

The measurement processing section 10 counts the number of revolutions NRO from the rotation number detector 6 by the measurement command DEC from the drive control section 12 and outputs the rotation number NRO in accordance with the detection plate detection signal PDS obtained from the detection plate detector 8 The count value of the number of revolutions NRO is measured at the timing of detection of the escape from the concealing plate 7 or the detection of the entry into the concealing plate 7. [ Then, the height difference is calculated by finding the difference between the count values of the different-layered, for example, the neighboring layered-up plate 7.

The layer height data FHD calculated by the measurement processing section 10 is stored in the storage section 11. [ Although not directly related to the present invention, the drive control unit 12 may control the elevator car 1 based on the elevation data stored in the storage unit 11, , The control command COC is outputted to the hoisting machine 4 to control the elevator car 1 to the required level in the elevator car call, landing call, and the like.

The drive control section 12 causes the elevator car 1 to perform the floor height learning operation during the floor height learning and causes the car 1 to travel between the lowest floor and the uppermost floor at the first speed V1 at the rated speed. Thereafter, the drive control section 12 drives the car 1 at a second speed V2 lower than the first speed V1 to obtain the lowest floor height. The second speed V2 accelerates from the lowest level to the second speed V2 from the lowest level as will be described later in Fig. 3, and the car 1 is moved to the lowest level from the time when the speed reaches the second speed V2. Until the speed at which the speed reaches the second speed V2 until the flapping plate detector 8 of the car 1 passes the end of the lowest flapping plate 7 Is determined so as to secure a predetermined set time length.

The predetermined set time length is determined from the mechanical specifications of the elevator machine including the elevator car 1, the main rope 2, the balance weight 3, the hoisting machine 4 and the governor 5, And so on, and is set to a value larger than a time length during which the vibration sufficiently decays. Considering the imbalance in the mechanical specifications, it is sufficient to determine the length of time for attenuation including the margin enough.

Fig. 2 is a view for explaining the elevator car running control at the time of floor level learning by the control of the control processing device 9 according to the first embodiment of the present invention. Fig. 2 (a) is a schematic view of an elevator, Fig. 2 (b) is a measuring point, Fig. 2 (c) is a speed of the car 1, d is the expansion / contraction amount of the governor rope 5a, ). And the vertical axis represents the position of the car corresponding to (a).

The drive control unit 12 causes the car 1 to travel at the first speed V1 between the lowest floor and the uppermost floor. In the floor height learning, the end of the fusing plate 7 indicated by a black circle in Fig. 2 (b) is measured.

2 (d) and 2 (e) because the elevator car 1 is accelerating at the upper end of the lowest level of the landing plate 7 during acceleration from the lowermost layer The expansion and contraction amount of the governor rope 5a or the main rope 2 is increased. Therefore, the error due to elongation and contraction is superimposed on the revolution count value at the time of detection of escape from the upper end of the spouting plate 7 in the measurement processing section 10, which is an error in the fullerene learning.

The size of the rope stretching of the governor rope 5a or the main rope 2 is proportional to the magnitude of the acceleration / deceleration. When the acceleration and the deceleration are the same, when the car 1 is decelerated to the lowermost layer, the length of the rope stretching of the governor rope 5a or the main rope 2 is the same, but the rope stretching direction is changed.

In the case of the upper layer, the mechanical system becomes high rigidity, and the amount of elongation of the rope becomes small. In many cases, errors superimposed as floor height learning can be neglected.

3 is a view for explaining an elevator car running control for the floor height measurement of the lowest floor in the floor height learning by the control of the control processing device 9 in the first embodiment of the present invention. The drive control section 12 causes the car 1 to run at a second speed V2 lower than the first speed V1 with respect to the lowest storey height. Fig. 3 (a) is a schematic view of the elevator, Fig. 3 (b) is a measuring point, Fig. 3 (c) is the speed of the car 1, d is the expansion / contraction amount of the governor rope 5a, ). The vertical axis indicates the position of the car corresponding to (a).

3, since the acceleration time is short at the second speed V2, the expansion and contraction amount of the governor rope 5a at the time of acceleration and the expansion and contraction amount of the main rope 2 at (e) at the time of acceleration are large, , The elevator car 1 travels at a constant speed at the measurement point of the lowest level of the landing plate 7 indicated by a black circle. 3, from the time when the speed after the completion of the acceleration reaches the second speed V2 to the time when the spark plug detector 8 of the car 1 escapes from the upper end of the spark plug plate 7, The time length T secures the set time length, and the vibration occurring at the time of the acceleration change is sufficiently attenuated. Therefore, the errors caused by elongation and contraction of the main rope 2 or the governor rope 5a do not overlap the count number of rotations at the time of measuring the position of the perforated plate 7 in the measurement processing unit 10. [

In the running shown in Fig. 3, measurement is performed in the lowest layer and the next adjacent layer.

4 shows an example of the internal configuration of the measurement processing unit 10 according to the first embodiment of the present invention. The measurement processing section 10 is provided with a layer thickness measuring section 10a, an error calculating section 10b and a correcting section 10d. It is also possible to set the dedicated storage area of the measurement processing unit 10 in the storage unit 11 or to set the dedicated storage area of the measurement processing unit 10 in a separate memory .

The floor height measuring section 10a counts the number of rotations NRO from the rotation number detector 6 in accordance with the measurement command DEC from the drive control section 12 and controls the elevator car 1, Of the elevating plate 7 of the elevator car 1 from the side edge in the advancing direction of the car 1 or the timing of detecting the entrance of the elevator car 1 to the front end of the car 1 in the advancing direction And counts the number of revolutions. Then, the lowest layer height is calculated by calculating the difference between the lowest value and the count value of the adjacent layer. In this case, both the lowest layer height LFH1 at the first speed V1 and the lowest layer height LFH2 at the second speed V2 are output as the floor height data LFHD.

The error arithmetic operation unit 10b calculates the difference between the lowest layer height LFH1 at the first velocity V1 and the lowest layer height LFH2 at the second velocity which are output from the layer height measurement unit 10a in accordance with the operation command ACO from the layer height measurement unit 10a (DELTA LFH = LFH2 - LFH1), and stores the difference in the storage unit 11. [0060]

The correcting unit 10d corrects the correction amount? LFH stored in the storage unit 11 in accordance with the correction command CCO from the floor height measuring unit 10a so that the lowest floor height LFH1 obtained at the first speed V1 included in the correction command CCO (LFH1 -? LFH) by the correction amount? LFH.

The floor height measuring section 10a converts the floor height of the lowest floor among the floor height data into the corrected floor height and stores it as the floor height data FHD in the storage section 11. [

The effects of the above configuration are summarized.

The drive control unit 12 controls the vehicle 1 to travel at a constant speed at a second speed V2 lower than the first speed V1 from the lowest floor to the adjacent floor. Because of this, traveling at the second speed V2 is only for the lowest floor, so that the rope stretching is less likely to be affected by the lower floor, and the learning time can be shortened.

The second speed V2 is determined such that the length of time from the time when the speed is accelerated to the second speed to when the concealment plate detector 8 of the car is exited from the concealment plate 7 is ensured to be the set time length do. This makes it possible to attenuate the vibration of the elevator car due to the expansion and contraction of the rope at the time of completion of the acceleration until the car 1 exits the conception plate 7, thereby improving the accuracy of the floor height learning.

The measurement processing unit 10 includes a correction unit 10d that corrects an error when re-learning is performed at the first speed V1. Thus, by calculating and storing the correction amount, it is not necessary to travel only at the first speed V1 for the adjusted floor height, and to run the elevator car at the second speed V2 for the floor level correction of the lowest floor.

Embodiment 2 Fig.

5 is a view schematically showing the overall configuration of an elevator control apparatus according to Embodiment 2 of the present invention.

The measurement processing section 10aa counts the number of revolutions NRO of the rotation number detector 6 by the measurement instruction DEC from the drive control section 12aa and detects the escape of the elevator car 1 from the conception plate 7, Or the counting of the number of revolutions at the timing of detection of entry into the fusing plate 7, calculates the thickness, and stores the counted value in the storage unit 11. The internal configuration of the measurement processing unit 10aa is the same as that shown in Fig. 4 of the first embodiment, but the error calculation unit 10b, the correction unit 10d, and the storage unit 11 are not used.

The drive control section 12aa first accelerates the lowest floor to the second speed V2, which is lower than the first speed V1, which is the above-mentioned rated speed, to drive the car 1. [ Thereafter, the elevator car 1 is reattached to a place where the conception plate 7 is not present, that is, where the conception plate detector 8 of the car 1 is not opposed to the conception plate 7, The elevator car 1 is driven by the first speed V1. The second speed is a time period from the time when the speed is accelerated to the second speed to when the concealment plate detector 8 of the car 1 escapes from the top of the concealment plate 7 is longer than a predetermined set time length Is determined. The preferred set time length is the same as in the above embodiment.

Fig. 6 is a view for explaining the elevator car running control at the time of floor height learning by the control of the control processing device 9 in the second embodiment of the present invention. 6 (a) to 6 (e) are the same as FIGS. 2 and 3 of the first embodiment, respectively.

The drive control section 12aa drives the car 1 at the second speed V2 lower than the first speed V1 with respect to the lowest layer. 6, since the acceleration time is short at the second speed V2, at the measurement point of the lowest level of the landing plate 7 indicated by a black circle in FIG. 6 (b), the car 1 is rotated at a constant speed . The length of time from the time when the speed after the completion of the acceleration reaches the second speed V2 to the time when the sparking plate detector 8 of the car 1 escapes from the upper end of the sparking plate 7 is secured to the set time length So that the vibration occurring when the acceleration changes is sufficiently attenuated.

After the concealment plate detector 8 has escaped from the lowermost conception plate 7, the car 1 is restored to the first speed V1. The distance to the next adjacent layer on the lowermost layer is sufficiently large so that at the measurement point of the fritting plate 7 on the layer next to the lowermost layer indicated by a black circle in Figure 6 (b) 1 Travel at a constant speed of V1.

Therefore, the errors caused by elongation and contraction of the main rope 2 or the governor rope 5a do not overlap with the count number of revolutions at the time of measuring the position of the perforated plate 7 in the measurement processing section 10aa.

In the case of the upper layer, since the mechanical system becomes highly rigid, the amount of expansion and contraction of the rope becomes small, and errors superimposed as floor height learning are often negligible. Therefore, here, the car 1 does not pass the conception plate 7 at the uppermost layer side, in particular, at a constant speed.

The effects of the above configuration are summarized.

The drive control section 12aa drives the car 1 at a constant speed at the second speed V2 lower than the first speed V1 and then drives the ignition plate detector 8 of the car 1 The car 1 is reattached at a position not opposed to the car 7, and the car runs at the first speed V1 up to the uppermost level. This eliminates the need to individually learn the lowest story.

The second speed V2 is set so that the length of time from when the speed after the end of the acceleration reaches the second speed V2 to when the conforcing plate detector 8 leaves the upper end of the fusing plate 7 is set to be the set time length . This makes it possible to attenuate the vibration of the elevator car caused by the expansion or contraction of the governor rope or the main rope at the time of completion of the acceleration until the car 1 exits the conception plate 7, and the accuracy of the floor height learning can be improved.

Embodiment 3:

7 is a view schematically showing the overall configuration of an elevator control apparatus according to Embodiment 3 of the present invention.

The measurement processing section 10bb is the same as the measurement processing section 10aa in Fig. 5 of the second embodiment.

The drive control section 12bb controls the drive control section 12bb so that the drive control section 12bb can control the drive speed of the drive section 12bb to the first speed V1 which is the rated speed for each section in which there is no conception plate 7, , The car 1 is reattached in stages. Further, after acceleration for each acceleration section, the time length from the conception plate detector 8 to the escape or entry of the conception plate detector 7 is ensured so that the vibration occurring at the time of acceleration change is sufficiently attenuated do. The preferred set time length is the same as in the above embodiment.

Fig. 8 is a view for explaining an elevator car running control at the time of floor level learning by the control of the control processing device 9 according to the third embodiment of the present invention.

The drive control section 12bb travels at the second speed V2 lower than the first speed V1 with respect to the lowermost layer. 8, since the acceleration time is short at the second speed V2, at the measurement point of the lowest level of the flushing plate 7 indicated by a black circle in FIG. 8 (b), when the car 1 is at a constant speed . The time length Ta from the time when the speed after the end of the acceleration reaches the second speed to the time when the spark plug detector 8 of the car 1 escapes from the upper end of the spark plug plate 7 is secured to the set time length So that the vibration occurring when the acceleration changes is sufficiently attenuated.

After escaping from the lowermost conception plate 7, the car 1 is restored to the third speed V3 (V1 > V3 > V2), which is lower than the first speed V1 and higher than the second speed V2. As shown in Fig. 8, the acceleration time to the third speed V3 is short. In addition, since the length of time Tb from the time when the speed after the completion of the acceleration reaches the third speed V3 to the time when the car 1 enters the conception plate 7 of the adjacent layer is secured for the set time length, The vibration occurring at the time of vibration is sufficiently attenuated. Therefore, at the measurement point of the landing plate 7 in the next adjacent layer of the lowest layer shown by a black circle in Fig. 8 (b), the car 1 travels at a constant speed.

Therefore, the errors caused by elongation and contraction of the main rope 2 or the governor rope 5a do not overlap with the count number of revolutions at the time of measuring the position of the perimeter plate 7 in the measurement processing section 10bb. Thereafter, the re-acceleration is carried out step by step until the first speed V1 for every section in which the conception plate 7 is absent, so that the errors do not overlap in the same way.

In the case of the upper layer, since the mechanical system becomes highly rigid, the amount of expansion and contraction of the rope becomes small, and errors superimposed as floor height learning are often negligible. Therefore, here, the uppermost layer does not pass through the conforcing plate 7 at a constant speed.

The effects of the above configuration are summarized.

During the floor height learning, the drive control section 12bb repeats the step-by-step re-acceleration to the first speed V1 for every section without the conception plate 7. [ This makes it possible to reduce the influence of the rope stretching due to acceleration even when the floor height is shortened, for example, in an elevator car having a two-door structure, and further shorten the learning time.

After acceleration for each section without the conception plate 7, control is performed such that the length of time until the conception plate 7 of the car 1 escapes or enters is set to a set time length. This makes it possible to attenuate the vibration of the elevator car due to the expansion and contraction of the rope at the time of completion of the acceleration until the car 1 exits the conception plate 7, thereby improving the accuracy of the floor height learning.

The conception plate 7 and the conception plate detector 8 are constituted so that the conception plate 7 provided in the layered position in the hoistway is detected by the conception plate detector 8 provided in the car 1, Thereby constituting the position detection units 7 and 8.

The revolving speed detector 6 constitutes an elevator car moving distance detecting section 6 that detects the moving distance of the car in accordance with the movement of the governor rope 5a or the main rope 2. [

Then, the metrology processing section 10 measures the height of the floor by the detected layer position and the moving distance of the car in the floor height learning operation.

2, 3, 6, and 8, even when the rotation number detector 6 is mounted on the traction machine 4, since the main rope 2 is stretched or shrunk, By applying 1, 2 and 3, it is possible to expect high definition of floor height learning as well.

Further, in each of the above-described embodiments, the elevator car 1 is raised from the lowest floor to the uppermost floor during the floor height learning. However, the elevator car 1 can be similarly operated by lowering the elevator car 1 from the uppermost floor to the lowermost floor.

[Possibility of industrial use]

INDUSTRIAL APPLICABILITY The elevator control device and control method according to the present invention can be widely applied to an elevator that uses floor height information for elevation control among rope elevators.

Claims (10)

A layered position detecting unit which detects a layered position by detecting a concealing plate provided at a layered position in the hoistway with a concealment plate detector provided in the car,
An elevator car moving distance detecting unit for detecting a moving distance of the elevator car based on a movement of a governor rope or a main rope,
A drive control unit for performing a floor height learning operation for the car in the floor height learning,
A measurement processing section for measuring the floor height by the detected layer position and the moving distance of the car in the floor height learning operation,
And a storage unit for storing the measured layer height,
Wherein the drive control unit passes at least the lowermost leveling plate through the elevator car at a constant speed during the floor height learning operation. The method according to claim 1,
Wherein the drive control section causes the distance from the lowermost layer to the next adjacent layer to travel at a constant speed at a second speed lower than the first speed as the rated speed. The method of claim 2,
The layered position detecting portion detects an end portion of the concealing plate in the advancing direction of the car,
Wherein the second speed is determined such that the length of time from the time when the elevator car accelerates to reach the second speed until the concealment plate detector passes the end of the concealment plate is ensured in the set time length, controller. The method according to claim 2 or 3,
The measuring unit may include:
An error arithmetic unit for obtaining an error between a floor height measured by running the lowest floor of the elevator car at the second speed and a floor height measured by running at the first speed and stored in the storage unit,
And correcting the error by the error when re-learning is performed at the first speed. The method according to claim 1,
Wherein the drive control unit drives the elevator car at a constant speed at a second speed lower than the first speed which is the rated speed of the car and then drives the elevator car in a section where the elevating plate detector does not detect the elevating plate, And to travel to the uppermost floor at the first speed. The method of claim 5,
The layered position detecting portion detects an end portion of the concealing plate in the advancing direction of the car,
Wherein the second speed is determined such that the length of time from the time when the elevator car accelerates to reach the second speed until the concealment plate detector passes the end of the concealment plate is ensured in the set time length, controller. The method according to claim 1,
Wherein the drive control unit causes the elevator car to be recharged step by step until a first speed that is a rated speed of the elevator car for each section in which the concealment plate detector does not detect the concealment plate. The method of claim 7,
The layered position detecting portion detects an end portion of the concealing plate in the advancing direction of the car,
Wherein the drive control section controls the speed of the elevator car so that the length of time from the acceleration of each section to the escape or entry of the fusing plate of the fusing plate detector secures the set time length. The method according to any one of claims 3, 6, and 8,
Wherein the set time length is a time length longer than a time length during which the vibration of the machine mechanism of the elevator due to the acceleration of the car is sufficiently attenuated. The elevator car is driven in a hoistway learning operation, and during the hoistway learning operation,
A planar plate provided in a layered position in the hoistway is detected by a planar plate detector provided in the car,
The moving distance of the car is detected based on the movement of the governor rope or the main rope,
The bed height is measured and stored by the detected layer position and the moving distance of the car,
Wherein at least the lowest-layer elevation plate passes through the elevator car at a constant speed.

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