CN111225868B - Elevator rope tension confirmation device and elevator rope tension confirmation system - Google Patents
Elevator rope tension confirmation device and elevator rope tension confirmation system Download PDFInfo
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- CN111225868B CN111225868B CN201780095786.1A CN201780095786A CN111225868B CN 111225868 B CN111225868 B CN 111225868B CN 201780095786 A CN201780095786 A CN 201780095786A CN 111225868 B CN111225868 B CN 111225868B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/12—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention aims to provide a rope tension confirming device of an elevator and a rope tension confirming system of the elevator, wherein the rope tension confirming device can monitor the change of the rope tension regardless of the position of a car. An elevator rope tension confirmation device (18) is provided with a storage unit (183), a generation unit (184), and a determination unit (185). The storage unit (183) stores learning data representing the sound or vibration measured by a measurement device (17) that measures the sound or vibration generated when the rope (10) of the elevator hits the sheave (3a) during a learning operation. A generation unit (184) generates reference data from the learning data stored in the storage unit (183). A determination unit (185) determines that the rope tension has changed based on the difference between diagnostic data representing sound or vibration measured by the measurement device (17) during a diagnostic operation and reference data.
Description
Technical Field
The present invention relates to a rope tension confirming device for an elevator and a rope tension confirming system for an elevator.
Background
Patent document 1 describes an example of a rope tension confirmation system for an elevator. A rope tension confirmation system for an elevator is provided with an imaging device and an image analysis means. The imaging device captures vibration of the rope when the car stops, and acquires image data. The image analysis unit calculates the vibration frequency of the rope from the acquired image data. A rope tension confirming system of an elevator monitors the change of the rope tension according to the calculated vibration frequency of the rope.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2011-184114
Disclosure of Invention
Problems to be solved by the invention
However, in the rope tension confirmation system for an elevator described in patent document 1, there is a car position where the rope does not enter the field of view of the imaging device. Therefore, the rope tension checking system of the elevator cannot monitor the change in rope tension regardless of the car position in the hoistway.
The present invention has been made to solve the above problems. An object of the present invention is to provide an elevator rope tension confirmation device and an elevator rope tension confirmation system capable of monitoring changes in rope tension regardless of the position of a car.
Means for solving the problems
The rope tension confirming device of the elevator comprises: a storage unit for storing learning data representing the sound or vibration measured by a measuring device for measuring the sound or vibration generated when the rope of the elevator touches the rope sheave during the learning operation; a generation unit that generates reference data from the learning data stored in the storage unit; and a determination unit that determines that the rope tension has changed based on a difference between diagnostic data representing sound or vibration measured by the measurement device during the diagnostic operation and the reference data.
The rope tension confirmation system for an elevator of the present invention comprises: a measuring device for measuring sound or vibration generated when a rope of an elevator touches a rope sheave; and a rope tension confirming device of the elevator, which stores the learning data representing the sound or vibration measured by the measuring device during the learning operation, generates the reference data according to the stored learning data, and judges the change of the rope tension according to the difference between the diagnosis data representing the sound or vibration measured by the measuring device during the diagnosis operation and the reference data.
Effects of the invention
According to these inventions, the rope tension confirming device for an elevator includes a storage unit, a generating unit, and a determining unit. The storage unit stores learning data representing sounds or vibrations measured by a measuring device that measures sounds or vibrations generated when a rope of an elevator hits a sheave during a learning operation. The generation unit generates reference data from the learning data stored in the storage unit. The determination unit determines that the rope tension has changed based on a difference between diagnostic data indicating sound or vibration measured by the measurement device during the diagnostic operation and the reference data. Thus, the rope tension confirming device of the elevator can monitor the change of the rope tension regardless of the position of the cage.
Drawings
Fig. 1 is a configuration diagram of an elevator including a rope tension confirmation system of an elevator according to embodiment 1.
Fig. 2 is a configuration diagram of a hoisting machine and a measuring apparatus according to embodiment 1.
Fig. 3 is a block diagram showing the configuration of an elevator rope tension confirmation apparatus according to embodiment 1.
Fig. 4 is a diagram showing an example in which the extraction unit of embodiment 1 extracts feature data.
Fig. 5 is a flowchart showing an example of the operation of the rope tension confirmation apparatus for an elevator according to embodiment 1.
Fig. 6 is a configuration diagram of a hoisting machine and a measuring apparatus according to a modification of embodiment 1.
Fig. 7 is a diagram showing a hardware configuration of a main part of an elevator rope tension confirmation apparatus according to embodiment 1.
Detailed Description
A mode for carrying out the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and overlapping description is simplified or omitted as appropriate.
Embodiment 1.
The configuration of the rope tension confirmation system for an elevator according to the present embodiment will be described with reference to fig. 1.
Fig. 1 is a configuration diagram of an elevator including a rope tension confirmation system of an elevator according to the present embodiment.
In fig. 1, a building includes a plurality of floors. The building is provided with an elevator.
In an elevator, a hoistway 1 penetrates each floor of a building. The plurality of landings 2 are provided on each floor of the building. Each of the landings 2 faces the hoistway 1.
The hoisting machine 3 is provided in an upper portion inside the hoistway 1. The hoisting machine 3 includes a sheave 3a and a motor not shown. The sheave 3a is mounted on the rotating shaft of the motor.
The diverting sheave 4 is provided at an upper portion inside the hoistway 1. The diverting pulley 4 is a rope pulley.
The car 5 is disposed inside the hoistway 1. The car 5 includes a weighing device 6 and two diverting pulleys 7. The weighing device 6 is provided to be able to detect the weight inside the car 5. Two diverting pulleys 7 are provided at the outer peripheral portion of the lower portion of the car 5. The two diverting pulleys 7 are pulleys.
The counterweight 8 is disposed inside the hoistway 1. The counterweight 8 includes a sheave 9 at an upper portion.
The ropes 10 are wound around the sheave 3a and the return sheave 4 of the hoisting machine 3. The ropes 10 are looped around each of the two diverting pulleys 7. The ropes 10 are wound around the sheave 9. Both ends of the rope 10 are supported by an upper portion inside the hoistway 1. The rope 10 is formed by twisting a plurality of strands around a core wire.
The governor 11 is provided in an upper portion inside the hoistway 1. The governor 11 includes a sheave 11 a. The governor 11 includes a switch that operates when the sheave 11a rotates faster than a predetermined speed, for example, using a weight that rotates following the rotation of the sheave 11 a.
The tension pulley 12 is disposed at a lower portion inside the hoistway 1. The tension pulley 12 is a sheave.
Both ends of the rope 13 are fixed to the car 5. The rope 13 is wound around the sheave 11a and the tension sheave 12 of the governor 11. The rope 13 is configured to be restrained from moving when a switch provided in the governor 11 is operated.
The control device 14 is provided inside the hoistway 1. The control device 14 is connected to the hoisting machine 3 so as to be able to transmit a signal for controlling the hoisting machine 3. The control device 14 is connected to the car 5 through a control cable 15 so as to be able to receive a car call signal from the car 5 and the like. The control device 14 is connected to the weighing device 6 so as to be able to receive data indicating the weight inside the car 5.
The rope tension confirmation system 16 of the elevator includes a measuring device 17 and a rope tension confirmation device 18 of the elevator.
The measuring device 17 is installed in an upper portion inside the hoistway 1. The measuring device 17 is a high-frequency microphone for measuring sound. The measuring device 17 is configured to be able to measure the sound generated when the rope 10 hits the sheave 3 a.
The rope tension confirming device 18 of the elevator is provided in an upper portion inside the hoistway 1. The rope tension confirmation device 18 of the elevator is connected to the measurement device 17 so as to be able to receive a signal indicating the sound measured by the measurement device 17. The rope tension checking device 18 of the elevator is configured to be able to monitor a change in rope tension based on the sound measured by the measuring device 17.
The monitoring terminal 19 is disposed in a place where a monitor monitoring the state of the elevator can visually confirm. The monitoring terminal 19 is, for example, a personal computer. The monitoring terminal 19 is connected to the rope tension confirmation device 18 of the elevator so as to be able to receive the monitoring result of the rope tension change.
During operation of the elevator, the control device 14 drives the motor of the hoisting machine 3. The sheave 3a of the hoisting machine 3 rotates following the driving of the motor. The rope 10 moves following the rotation of the sheave 3 a. The car 5 and the counterweight 8 move up and down along a guide rail, not shown, following the movement of the rope 10. The position of the car 5 corresponds to the length L of the rope 10 pulled out from the sheave 3 a.
The rope 13 moves in accordance with the up-and-down movement of the car 5. The sheave 11a of the governor 11 rotates following the movement of the rope 13. The rotation speed of the sheave 11a corresponds to the speed at which the car 5 ascends and descends. The governor 11 stops the car 5 by suppressing the movement of the rope 13 when the rotation speed of the sheave 11a is high.
Next, the configurations of the hoisting machine 3 and the measuring device 17 will be described with reference to fig. 2.
Fig. 2 is a configuration diagram of the hoisting machine and the measuring device according to the present embodiment.
The measuring device 17 is disposed so as to be able to measure the sound generated when the strands 10a hit the sheave 3a when the hoisting machine 3 hoists the ropes 10. The measuring device 17 is disposed, for example, toward a portion of the sheave 3a where winding of the rope 10 starts or a portion where winding ends.
Next, the structure of the rope tension confirmation device 18 of the elevator will be described with reference to fig. 3.
Fig. 3 is a block diagram showing the configuration of the rope tension confirmation device for an elevator according to the present embodiment.
The rope tension confirmation device 18 of the elevator is connected to the measurement device 17 so as to be able to receive sound data indicating the sound measured by the measurement device 17. The rope tension confirming device 18 of the elevator is connected to the control device 14 so as to be able to receive data indicating the internal weight of the car 5 or data indicating the position of the car 5. The rope tension confirming device 18 of the elevator is connected to a monitoring terminal 19 so as to be able to transmit a result of monitoring the rope tension.
The rope tension checking device 18 of the elevator has a learning operation and a diagnosis operation as operation modes. The operation mode of the rope tension checking device 18 of the elevator is switched according to the operation of a maintenance worker or a predetermined period of time.
The rope tension confirming device 18 of the elevator is switched to the learning operation by a maintenance person after the replacement of the rope 10, for example.
When the operation mode of the rope tension checking device 18 of the elevator is the learning operation, the elevator is operated by a serviceman as follows, for example. First, the maintenance person operates the car 5 between the lowermost floor and the uppermost floor with the minimum load with which the elevator can operate. Then, the maintenance person increases the load to operate the car 5 between the lowermost floor and the uppermost floor. Then, each time the maintenance worker increases the load, the maintenance worker operates the car 5 between the lowermost floor and the uppermost floor, and repeats such operation until the load becomes the maximum load at which the elevator can be operated. Thus, the elevator performs an operation covering a range of tensile lengths of the operable ropes 10 and a range of loads during the learning operation. After the operation of the elevator performed during the learning operation is completed, the maintenance person switches the operation mode of the rope tension confirmation device 18 of the elevator to the diagnosis operation.
When the operation mode of the rope tension checking device 18 of the elevator is the diagnosis operation, the elevator is operated by a user, for example. The elevator performs an operation capable of performing a normal service during the diagnosis operation.
The rope tension confirmation device 18 for an elevator includes an extraction unit 181, a control unit 182, a storage unit 183, a generation unit 184, a determination unit 185, and a communication unit 186.
The extraction unit 181 receives sound data representing the sound measured by the measurement device 17. The extraction unit 181 extracts feature data for finding a feature of the received sound data. The sound data and the feature data are examples of data representing the sound measured by the measurement device 17. The extraction unit 181 transmits the extracted feature data to the control unit 182.
The control unit 182 receives load data indicating the weight inside the car 5 and position data indicating the position of the car 5 from the control device 14. The load data is an example of data indicating the load applied to the rope 10. The position data is an example of data indicating the length of the rope 10 stretched from the sheave 3 a. The control unit 182 receives feature data from the extraction unit 181.
The control unit 182 determines whether or not the operation mode of the rope tension checking device 18 of the elevator is the learning operation. When determining that the operation mode of the rope tension checking device 18 of the elevator is the learning operation, the control unit 182 transmits the feature data extracted by the extraction unit 181, and the load data and the position data received from the control device 14 to the storage unit 183.
The storage unit 183 stores the feature data received from the control unit 182 in association with the load data and the position data received at the same time. The feature data stored in association with the load data and the position data is an example of the learning data.
When determining that the operation mode of the rope tension checking device 18 of the elevator is not the learning operation, the control unit 182 determines that the operation mode is the diagnosis operation. When determining that the operation mode of the rope tension checking device 18 of the elevator is the diagnostic operation, the control unit 182 transmits the load data and the position data to the generating unit 184. Then, the control unit 182 transmits the feature data extracted by the extraction unit 181 to the determination unit 185.
The generation unit 184 generates reference data corresponding to the received load data and position data, based on the feature data stored in the storage unit 183 in association with the received load data and position data. The generation unit 184 transmits the generated reference data to the determination unit 185.
The generation unit 184 generates the reference data as follows, for example. The generation unit 184 reads the feature data stored in the storage unit 183, and the load data and the position data stored in association with the feature data. The generation unit 184 calculates an absolute value of a difference between the load data read from the storage unit 183 and the load data received from the control unit 182. The generation unit 184 calculates an absolute value of a difference between the position data read from the storage unit 183 and the position data received from the control unit 182. The generation unit 184 calculates the sum of the absolute values of the differences between the calculated load data and position data as the manhattan distance from the load data and position data received from the control unit 182. The generation unit 184 generates, as reference data, feature data stored in association with load data and position data having the smallest manhattan distance between the load data and the position data received from the control unit 182.
The determination unit 185 compares the feature data received from the control unit 182 with the reference data received from the generation unit 184. The determination unit 185 calculates a difference between the feature data and the reference data. The determination unit 185 determines that the rope tension has changed when the absolute value of the calculated difference is larger than a predetermined range. When determining that the rope tension has changed, the determination unit 185 transmits data indicating the change in the rope tension to the communication unit 186.
The communication unit 186 transmits the received data indicating the change in the rope tension to the monitoring terminal 19.
The monitoring terminal 19 displays the change in rope tension based on the received data. The monitor confirms the change in the rope tension by the display of the monitor terminal 19.
Next, an example in which the extracting unit 181 extracts feature data will be described with reference to fig. 4.
Fig. 4 is a diagram showing an example in which the extracting unit of the present embodiment extracts feature data.
The extraction unit 181 takes the sound data measured by the measurement device 17 as input data. The graph 200 is a graph showing an example of the sound data measured by the measurement device 17. The vertical axis of the graph 200 represents the amplitude of the sound measured by the measuring device 17. The horizontal axis of the graph 200 represents time.
The extraction section 181 converts sound data during a predetermined time interval into data of a frequency distribution by FFT (Fast Fourier transform), for example.
When there is a known sound other than the sound generated by the rope 10 hitting the sheave 3a, the extracting unit 181 subtracts a component corresponding to the known sound from the obtained frequency distribution. The known sound is, for example, a sound generated from a bearing of the sheave 3 a. The extraction unit 181 extracts the peak frequency, which is the frequency having the highest intensity of the obtained frequency distribution, as feature data.
When the feature data is a peak frequency, the determination unit 185 determines the absolute value of the difference between the peak frequency as the reference data and the peak frequency as the feature data as the difference between the peak frequency and the reference data.
Next, the operation of the rope tension checking device 18 of the elevator will be described with reference to fig. 5.
Fig. 5 is a flowchart showing an example of the operation of the rope tension confirmation apparatus for an elevator according to the present embodiment.
In step S1, the extraction unit 181 receives the sound data measured by the measurement device 17. Then, the operation of the rope tension confirming device 18 of the elevator proceeds to step S2.
In step S2, the extraction unit 181 extracts feature data from the received sound data. Then, the extraction unit 181 transmits the extracted feature data to the control unit 182. Then, the operation of the rope tension confirming device 18 of the elevator proceeds to step S3.
In step S3, the control unit 182 receives the load data and the position data from the control device 14. Then, the operation of the rope tension confirming device 18 of the elevator proceeds to step S4.
In step S4, the control unit 182 determines whether or not the operation mode of the rope tension checking device 18 of the elevator is the learning operation. If the determination result is yes, the operation of the rope tension confirmation device 18 of the elevator proceeds to step S5. If the determination result is "no", the operation of the rope tension confirmation device 18 of the elevator proceeds to step S6.
In step S5, the control unit 182 transmits the feature data, the load data, and the position data to the storage unit 183. The storage unit 183 stores the received feature data in association with the load data and the position data. Then, the operation of the rope tension confirming device 18 of the elevator proceeds to step S1.
In step S6, the control unit 182 determines that the operation mode of the rope tension checking device 18 of the elevator is the diagnosis operation. The control section 182 sends the load data and the position data to the generation section 184. The control unit 182 transmits the feature data to the determination unit 185. Then, the generating unit 184 generates reference data from the load data and the position data. Then, the generation unit 184 transmits the generated reference data to the determination unit 185. Then, the operation of the rope tension confirming device 18 of the elevator proceeds to step S7.
In step S7, the determination unit 185 compares the feature data with the reference data to calculate a difference. Then, the operation of the rope tension confirming device 18 of the elevator proceeds to step S8.
In step S8, the determination unit 185 determines whether or not the calculated difference is larger than a predetermined range. If the determination result is "no", the operation of the rope tension confirmation device 18 of the elevator proceeds to step S1. If the determination result is yes, the operation of the rope tension confirmation device 18 of the elevator proceeds to step S9.
In step S9, the determination unit 185 detects that the rope tension has changed. Then, the determination unit 185 transmits data indicating the change in the rope tension to the communication unit 186. Then, the communication unit 186 transmits data indicating the change in the rope tension to the monitoring terminal 19. Then, the operation of the rope tension confirming device 18 of the elevator proceeds to step S1.
As described above, the rope tension confirmation system 16 for an elevator according to the present embodiment includes the measurement device 17 and the rope tension confirmation device 18 for an elevator. The measuring device 17 measures the sound generated when the rope 10 of the elevator hits the sheave 3 a. The rope tension confirmation device 18 for an elevator includes a storage unit 183, a generation unit 184, and a determination unit 185. The storage unit 183 stores learning data indicating the sound measured by the measuring device 17 during the learning operation. The generation unit 184 generates reference data from the learning data stored in the storage unit 183. The determination unit 185 determines that the rope tension has changed based on the difference between the diagnostic data representing the sound measured by the measurement device 17 during the diagnostic operation and the reference data.
The sound generated when the rope 10 hits the sheave 3a is generated regardless of the position of the car 5. The frequency of the sound varies according to the rope tension of the rope 10 as the generation source. Thereby, the rope tension confirming device 18 of the elevator can monitor the change of the rope tension regardless of the position of the car 5. In quality control of a main rope, which is an important device of an elevator, control of rope tension is important. The rope tension confirming device 18 of the elevator can constantly monitor the rope tension of the rope 10 as the main rope.
Since the rope tension confirmation device 18 of the elevator monitors the sound generated from the rope 10, the rope tension can be confirmed regardless of the feeling of the maintenance person.
The rope tension confirmation device 18 of the elevator can confirm the rope tension without installing a large-sized device because data is collected by the measurement device 17, which is a high-frequency microphone, for example.
The ropes cannot be made exactly the same, even if of the same model. Therefore, even with the same rope tension, the sound generated when the rope hits the sheave may vary from rope to rope and from sheave to sheave. The rope tension confirming device 18 of the elevator uses the sound generated from the rope 10 and the sheave 3a as the object as the learning data. Thus, the rope tension confirming device 18 of the elevator can suppress the influence of variations due to manufacturing differences of the ropes and the sheaves, and the like, in monitoring the fluctuation of the rope tension.
The rope tension bias on the winding start side and the winding end side of the rope 10 of the sheave 3a may accelerate deterioration due to wear of the sheave 3a and the rope 10. Therefore, the monitoring of the bias of the rope tension is also important in the quality control of the main rope.
The measuring device 17 can simultaneously measure the sounds generated from both the portion of the sheave 3a where the winding of the rope 10 starts and the portion where the winding ends. When the frequency distributions of the simultaneously measured sounds can be separated, the rope tension confirming device 18 of the elevator can simultaneously monitor the fluctuation of the rope tension on both the winding start side and the winding end side. Therefore, the rope tension checking device 18 of the elevator can monitor the rope tension bias.
For example, when the lengths of the ropes 10 stretched from the portion where the winding of the sheave 3a starts and the portion where the winding ends are different, the peak frequencies of the sounds generated from the two portions are different from each other. In this case, the frequency distributions of the sounds generated from the two portions can be separated.
The storage unit 183 stores the learning data in association with data indicating the length of the rope 10 stretched from the sheave 3 a. The generating unit 184 generates reference data based on the data indicating the length of the rope 10 pulled out from the sheave 3 a. The frequency of the sound generated when the rope 10 hits the sheave 3a varies depending on the length stretched from the sheave 3a of the rope 10 as a generation source. The generating unit 184 generates reference data corresponding to the length stretched from the sheave 3a of the rope 10 in the frequency change of the sound. Thus, even when the length of the rope 10 stretched from the sheave 3a changes, the rope tension confirmation device 18 of the elevator can monitor the fluctuation of the rope tension.
In the case where the elevator performs a normal operation during the diagnosis operation, the length of the rope 10 stretched from the sheave 3a changes as the car 5 ascends and descends. The generating unit 184 generates reference data based on position data indicating the length of the rope 10 stretched from the sheave 3 a. Thus, even when the elevator is in a normal operation, the rope tension checking device 18 of the elevator can constantly monitor the change in the rope tension.
The storage unit 183 stores learning data in association with data indicating the load applied to the rope 10. The generating unit 184 generates reference data based on data indicating the load applied to the rope 10. The frequency of the sound generated when the rope 10 hits the sheave 3a varies depending on the load applied to the rope 10 as the generation source. The generating unit 184 generates reference data corresponding to the load applied to the rope 10 during the frequency change of the sound. Thus, even when the load applied to the rope 10 changes, the rope tension checking device 18 of the elevator can monitor the fluctuation of the rope tension.
In the case where the elevator performs a normal operation during the diagnosis operation, the load applied to the rope 10 changes as the passenger rides on and off the car 5. The generating unit 184 generates reference data from the load data. Thus, even when the elevator is in a normal operation, the rope tension checking device 18 of the elevator can constantly monitor the change in the rope tension.
The generating unit 184 may generate, as the reference data, the feature data stored in association with the load data and the position data having the smallest euclidean distance between the load data and the position data received from the control unit 182. The generating unit 184 may use another distance or the like instead of the manhattan distance or the euclidean distance in order to select the feature data to be generated as the reference data.
The generation unit 184 may generate reference data corresponding to the load data and the position data received from the control unit 182 by performing two-dimensional interpolation based on the load data, the position data, and the feature data stored in the storage unit 183. As a method of the two-dimensional interpolation, the generation unit 184 may use, for example, a bilinear interpolation, a bicubic interpolation, or a two-dimensional spline interpolation.
The generating unit 184 may set the recursive formula based on the load data, the position data, and the feature data stored in the storage unit 183. The generating unit 184 may generate reference data corresponding to the load data and the position data received from the control unit 182 based on the set recursive formula.
The generating unit 184 may generate reference data corresponding to the load data and the position data received from the control unit 182 based on a predetermined model expression. The generating unit 184 may determine the model parameters of the model equation by fitting the load data and the position data stored in the storage unit 183 to the feature data.
The generating unit 184 may generate the reference data from only one of the load data and the position data. The generating unit 184 may generate reference data corresponding to the load data and the position data received from the control unit 182 by performing one-dimensional interpolation based on the load data or the position data and the feature data stored in the storage unit 183. As a method of the one-dimensional interpolation, the generation unit 184 may use, for example, linear interpolation, polynomial interpolation, or spline interpolation. The generation unit 184 can simplify the generation of the reference data when the influence of either the load data or the position data on the change in the sound generated when the rope 10 hits the sheave 3a is small.
The generation unit 184 may generate data stored as learning data in the storage unit 183 as it is as reference data, not based on the load data and the position data. The storage unit 183 may store, as learning data, for example, a time average of feature data extracted from sound data during a learning operation, without being associated with load data and position data. When both the load data and the position data have a small influence on the change in the sound generated when the rope 10 strikes the sheave 3a, the generation unit 184 can simplify the generation of the reference data.
The extraction unit 181 may extract, as feature data, frequencies obtained by weighted averaging the intensities of the frequency distributions as weights. The extraction unit 181 may multiply the weight by a window function in weighted averaging. The window function is, for example, a function in which the window function is set to zero outside a predetermined frequency range including the sound generated when the rope 10 hits the sheave 3 a. When the feature data is a weighted average frequency, the determination unit 185 determines the absolute value of the difference between the weighted average frequency as the reference data and the weighted average frequency as the feature data as the difference between the two frequencies.
The extraction unit 181 may extract the frequency distribution itself as feature data. When the feature data is a frequency distribution, the determination unit 185 determines, for example, a mean square error between the frequency distribution as the reference data and the frequency distribution as the feature data as a difference between the two.
The extraction unit 181 may extract feature data from the sound data or the frequency distribution by a feature extraction method such as an artificial neural network. When the feature data is a scalar quantity, the judgment unit 185 sets the absolute value of the difference between the scalar quantity as the reference data and the scalar quantity as the feature data as the difference between the scalar quantity and the feature data. When the feature data is a vector, the determination unit 185 determines the norm of the vector as the reference data and the vector as the feature data as the difference between the two.
The extraction unit 181 may use wavelet transform in the case of converting sound data into a frequency distribution.
When the operation mode of the rope tension checking device 18 of the elevator is the learning operation, the elevator may be operated by a user. That is, during the learning operation, the elevator may be operated so as to be able to perform a normal service. The rope tension checking device 18 of the elevator may switch the operation mode to the diagnostic operation when a predetermined time has elapsed since the maintenance person switched the operation mode to the learning operation. The rope tension confirming device 18 of the elevator does not operate the elevator covering the operation condition for learning, so that the period of not performing the normal service can be shortened.
The rope tension confirming device 18 of the elevator may be switched to the learning operation after a predetermined period of time has elapsed from the replacement of the rope 10. The rope tension confirmation device 18 of the elevator can learn a state in which the influence of initial elongation and the like immediately after the replacement of the rope 10 is small. When diagnostic data is obtained from the measurement by the measuring device 17, the rope tension confirming device 18 of the elevator may determine that the rope 10 has been replaced when the difference between the diagnostic data and the diagnostic data obtained before the diagnostic data is larger than a predetermined range. The rope tension confirmation device 18 of the elevator may be switched to the learning operation immediately after the determination or after a predetermined period of time has elapsed from the determination.
In the case where the operation mode of the rope tension confirmation apparatus 18 of the elevator is a diagnostic operation, the elevator may be operated by a maintenance person. Since the operating conditions of the elevator necessary for the diagnosis can be covered, the rope tension checking device 18 of the elevator can monitor the fluctuation of the rope tension more reliably. The rope tension confirming device 18 of the elevator may be switched to the learning operation in response to a switching signal from a remote place. Even if an error occurs in the learning data due to an instantaneous stop or noise of the measured data, the rope tension confirmation device 18 of the elevator can be easily restored.
When the operation mode of the rope tension checking device 18 of the elevator is the diagnosis operation, the control device 14 may perform the diagnosis of the rope tension together with the diagnosis operation of the elevator for checking the abnormality of the operation performance, the brake performance, the door opening/closing, the emergency power battery, and the like of the elevator, which is performed 1 time per 1 month, for example, according to a predetermined schedule.
The rope tension confirmation device 18 of the elevator may be applied to a rope other than the rope 10 as the main rope. The rope tension confirmation device 18 for an elevator may be applied to a sheave other than the sheave 3a of the hoisting machine 3. The measuring device 17 may measure the sound generated when the sheave 9 provided in the counterweight 8, the return sheave 7 provided in the car 5, or the return sheave 4 collides with the rope 10. The measuring device 17 may measure a sound generated when the sheave 11a or the tension sheave 12 of the governor 11 hits the rope 13. In the case where the elevator is provided with a balance rope for adjusting the difference in weight between the ropes 10 on the car 5 side and the counterweight 8 side, the measuring device 17 may measure the sound generated when the sheave around which the balance rope is wound hits the balance rope.
The hoisting machine 3 may be disposed in the lower portion of the hoistway 1. The hoisting machine 3 may be disposed in a machine room provided above the outside of the hoistway 1.
The rope tension confirming device 18 of the elevator may also serve as the control device 14. The rope tension confirmation device 18 of the elevator may be disposed outside the hoistway 1. The rope tension confirming device 18 of the elevator may be a computer connected to the measuring device 17 at the time of maintenance check.
Next, a modification of the present embodiment will be described with reference to fig. 6.
Fig. 6 is a configuration diagram of a hoisting machine and a measuring apparatus according to a modification of the present embodiment.
The measuring device 17 is a vibration sensor for measuring vibration. The measuring apparatus 17 includes a probe (probe)17 a. The probe 17a is used to detect the vibration of the contacted portion. The probe 17a is, for example, arranged in contact with the rotation shaft of the sheave 3 a. The probe 17a may be disposed so as to contact a bearing of a rotating shaft of a motor of the hoisting machine 3.
The measuring device 17 measures the vibration generated when the rope 10 hits the sheave 3 a. This vibration is a source of sound generated when the rope 10 hits the sheave 3 a. Therefore, the rope tension checking device 18 of the elevator can monitor the change in rope tension in the same manner as the measurement based on the sound.
Specifically, the rope tension confirmation system 16 of the elevator includes a measurement device 17 and a rope tension confirmation device 18 of the elevator. The measuring device 17 measures the vibration generated when the rope 10 hits the sheave 3 a. The rope tension confirmation device 18 for an elevator includes a storage unit 183, a generation unit 184, and a determination unit 185. The storage unit 183 stores learning data indicating the vibration measured by the measuring device 17 during the learning operation. The generation unit 184 generates reference data from the learning data stored in the storage unit 183. The determination unit 185 determines that the rope tension has changed based on the difference between the diagnostic data indicating the vibration measured by the measurement device 17 during the diagnostic operation and the reference data.
The vibration generated when the rope 10 hits the sheave 3a is generated regardless of the position of the car 5. The frequency of the vibration varies depending on the rope tension of the rope 10 as the generation source. Thereby, the rope tension confirming device 18 of the elevator can constantly monitor the change of the rope tension regardless of the position of the car 5.
Next, an example of the hardware configuration of the rope tension checking device 18 of an elevator will be described with reference to fig. 7.
Fig. 7 is a diagram showing a hardware configuration of a main part of the rope tension confirmation apparatus for an elevator according to the present embodiment.
The functions of the rope tension confirmation appliance 18 of the elevator can be implemented by means of a processing circuit. The processing circuitry is provided with at least one processor 18b and at least one memory 18 c. The processing circuit may include a processor 18b and a memory 18c, or may include at least one dedicated hardware 18a instead of these.
In the case where the processing circuit includes the processor 18b and the memory 18c, each function of the rope tension confirmation device 18 of the elevator is realized by software, firmware, or a combination of software and firmware. At least one of the software and the firmware is described as a program. The program is stored in the memory 18 c. The processor 18b realizes the functions of the rope tension confirming device 18 of the elevator by reading out and executing the program stored in the memory 18 c.
The processor 18b is also called a CPU (Central Processing Unit), a Processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP. The memory 18c is constituted by, for example, a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM, a magnetic disk, a flexible disk, an optical disk, a CD (compact disc), a mini disk, or a DVD.
In the case where the processing Circuit includes the dedicated hardware 18a, the processing Circuit is realized by, for example, a single Circuit, a composite Circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof.
The functions of the rope tension confirmation appliance 18 of the elevator can be implemented by the processing circuit separately. Alternatively, the functions of the rope tension confirming device 18 of the elevator may be realized by the processing circuit in a lump. For each function of the rope tension confirming device 18 of the elevator, one part may be implemented by dedicated hardware 18a and the other part may be implemented by software or firmware. In this way the processing circuit realizes the functions of the rope tension confirmation device 18 of the elevator by means of hardware 18a, software, firmware or a combination thereof.
Industrial applicability
The rope tension confirmation system for an elevator according to the present invention can be applied to an elevator system including a rope wound around a sheave.
Description of the reference symbols
1: a hoistway; 2: a landing; 3: a traction machine; 3 a: a sheave; 4: a diverting pulley; 5: a car; 6: a weighing device; 7: a diverting pulley; 8: a counterweight; 9: a sheave; 10: a rope; 10 a: a strand; 11: a speed limiter; 11 a: a sheave; 12: a tension wheel; 13: a rope; 14: a control device; 15: a control cable; 16: a rope tension confirmation system of the elevator; 17: a measuring device; 17 a: a probe; 18: a rope tension confirming device of the elevator; 19: a monitoring terminal; 181: an extraction unit; 182: a control unit; 183: a storage unit; 184: a generation unit; 185: a determination unit; 186: a communication unit; 18 a: hardware; 18 b: a processor; 18 c: a memory.
Claims (4)
1. A rope tension confirmation device for an elevator, the rope tension confirmation device comprising:
a storage unit for storing learning data indicating sound or vibration generated when a rope of an elevator hits a sheave during a learning operation when the sound or vibration is measured by the measuring device;
a generation unit that generates reference data from the learning data stored in the storage unit; and
and a determination unit that determines that the rope tension has changed based on a difference between diagnostic data indicating sound or vibration generated when the rope hits the sheave and the reference data when the sound or vibration is measured by the measurement device during the diagnostic operation.
2. The rope tension confirmation apparatus of an elevator according to claim 1,
the storage unit stores the learning data in association with data indicating a length of the rope stretched from the sheave,
the generation unit generates the reference data based on data indicating a length of the rope stretched from the sheave.
3. The rope tension confirmation apparatus of an elevator according to claim 1 or 2,
the storage unit stores the learning data in association with data indicating a load applied to the rope,
the generation unit generates the reference data based on data indicating a load applied to the rope.
4. A rope tension confirmation system for an elevator, characterized by comprising:
a measuring device for measuring sound or vibration generated when a rope of an elevator touches a rope sheave; and
the rope tension confirming device of the elevator stores the learning data representing the sound or the vibration when the measuring device measures the sound or the vibration generated when the rope touches the rope sheave during the learning operation, and generates the reference data according to the stored learning data, and when the measuring device measures the sound or the vibration generated when the rope touches the rope sheave during the diagnosis operation, the rope tension confirming device of the elevator judges that the rope tension is changed according to the difference between the diagnosis data representing the sound or the vibration and the reference data.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/046197 WO2019123650A1 (en) | 2017-12-22 | 2017-12-22 | Elevator rope tension checking device and elevator rope tension checking system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111225868A CN111225868A (en) | 2020-06-02 |
| CN111225868B true CN111225868B (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201780095786.1A Active CN111225868B (en) | 2017-12-22 | 2017-12-22 | Elevator rope tension confirmation device and elevator rope tension confirmation system |
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| Country | Link |
|---|---|
| JP (1) | JP6350782B1 (en) |
| CN (1) | CN111225868B (en) |
| WO (1) | WO2019123650A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7188611B2 (en) * | 2019-09-30 | 2022-12-13 | 三菱電機株式会社 | Elevator rope tension measurement system |
| CN113086808B (en) * | 2021-04-30 | 2022-05-03 | 天津市滨海新区检验检测中心 | Elevator safety monitoring mechanism and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177100C (en) * | 2000-03-15 | 2004-11-24 | 株式会社日立制作所 | Rope, and elevator using the same |
| CN102317193A (en) * | 2009-02-12 | 2012-01-11 | 奥的斯电梯公司 | Elevator tension member monitoring device |
| CN103359565A (en) * | 2012-04-06 | 2013-10-23 | 富士达株式会社 | Lift cable tension measuring method and device |
| CN103991767A (en) * | 2013-02-14 | 2014-08-20 | 三菱电机株式会社 | Elevator apparatus and rope sway suppressing method therefor |
| CN106865375A (en) * | 2017-02-23 | 2017-06-20 | 太原理工大学 | Hoisting container hanging steel rope on-line monitoring system and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07209109A (en) * | 1994-01-11 | 1995-08-11 | Mitsubishi Denki Bill Techno Service Kk | Tension measuring device |
| JP3763941B2 (en) * | 1997-07-25 | 2006-04-05 | 三菱電機ビルテクノサービス株式会社 | Elevator main rope tension adjuster |
| JP4995687B2 (en) * | 2007-10-11 | 2012-08-08 | 三ツ星ベルト株式会社 | Belt squeal evaluation method and apparatus, and program |
| JP2015203484A (en) * | 2014-04-16 | 2015-11-16 | セイコーエプソン株式会社 | recording device |
| KR102054097B1 (en) * | 2016-05-24 | 2019-12-09 | 미쓰비시덴키 가부시키가이샤 | Breaking detection device |
-
2017
- 2017-12-22 WO PCT/JP2017/046197 patent/WO2019123650A1/en active Application Filing
- 2017-12-22 CN CN201780095786.1A patent/CN111225868B/en active Active
- 2017-12-22 JP JP2018517908A patent/JP6350782B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177100C (en) * | 2000-03-15 | 2004-11-24 | 株式会社日立制作所 | Rope, and elevator using the same |
| CN102317193A (en) * | 2009-02-12 | 2012-01-11 | 奥的斯电梯公司 | Elevator tension member monitoring device |
| CN103359565A (en) * | 2012-04-06 | 2013-10-23 | 富士达株式会社 | Lift cable tension measuring method and device |
| CN103991767A (en) * | 2013-02-14 | 2014-08-20 | 三菱电机株式会社 | Elevator apparatus and rope sway suppressing method therefor |
| CN106865375A (en) * | 2017-02-23 | 2017-06-20 | 太原理工大学 | Hoisting container hanging steel rope on-line monitoring system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6350782B1 (en) | 2018-07-04 |
| JPWO2019123650A1 (en) | 2019-12-19 |
| WO2019123650A1 (en) | 2019-06-27 |
| CN111225868A (en) | 2020-06-02 |
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