JP4849397B2 - Elevator abnormality detection device - Google Patents

Description

  The present invention relates to an elevator abnormality detection device for detecting catching of a rope that moves as a car moves.

  2. Description of the Related Art Conventionally, there has been proposed an elevator abnormality detection device that drops an annular dropping member through which a rope is passed in order to detect the hooking of the rope. A wireless tag is attached to the annular dropping member. In addition, a reading device that receives the annular dropping member is provided at the lower part of the hoistway. A signal from the wireless tag is received by the reader when the annular drop member reaches the position of the reader. When the reading device does not receive a signal from the wireless tag even though the annular dropping member has been dropped, the hook of the rope is detected (see, for example, Patent Document 1).

JP-A-2005-29312

  However, in the conventional elevator abnormality detection device, since it is necessary to newly install a wireless tag and a reading device, the manufacturing cost increases.

  In addition, once the annular dropping member is dropped, it cannot be automatically restored, so that it is impossible to repeatedly perform the rope hook automatic detection operation. As a result, it is impossible to improve the reliability of the rope catch detection.

  The present invention has been made in order to solve the above-described problems, and can detect an abnormality of an elevator more reliably and can suppress an increase in cost. The object is to obtain a detection device.

The elevator abnormality detection device according to the present invention includes a vibration detection unit that detects vibration of a rope that moves as the car moves, and a frequency analysis that performs frequency analysis on the vibration of the rope based on information from the vibration detection unit. Among the vibration components of the rope when moving while contacting the part and the hoistway device, a predetermined frequency region including the frequency of the vibration component due to the surface shape of the rope is set in advance as a determination region. A plurality of determination units for determining whether or not the rope is caught on the hoistway device by comparing the magnitude of the vibration component obtained by frequency analysis with a predetermined reference value, and moving the car at different speeds. Different types of inspection operations are performed, and different frequency regions corresponding to the speed of the car are set as determination regions for each inspection operation.

  In the elevator abnormality detection device according to the present invention, the frequency analysis of the vibration of the rope is performed, and the magnitude of the vibration component obtained by the frequency analysis is compared with a predetermined reference value in a predetermined determination region. Therefore, since it is determined whether or not the rope is caught on the hoistway device, it is not necessary to newly add an expensive wireless tag, a reading device or the like as in the past, and the increase in cost is suppressed. be able to. Moreover, the detection operation | movement of the presence or absence of the rope being caught in the hoistway apparatus can be performed repeatedly, and the presence or absence of the abnormality of an elevator can be detected more reliably.

Embodiment 1 FIG.
1 is a block diagram showing an elevator provided with an abnormality detection apparatus according to Embodiment 1 of the present invention. In the figure, a car 2 and a counterweight 3 are provided in the hoistway 1 so as to be able to move up and down. A hoisting machine 4 for raising and lowering the car 2 and the counterweight 3 is provided at the lower part of the hoistway 1.

  The hoisting machine 4 includes a hoisting machine main body 5 including a motor, and a drive sheave 6 rotated by the hoisting machine main body 5. A plurality of main ropes 7 are wound around the drive sheave 6. The car 2 and the counterweight 3 are suspended in the hoistway 1 by the main ropes 7. The car 2 and the counterweight 3 are moved up and down in the hoistway 1 by the rotation of the drive sheave 6.

  Each main rope 7 is formed by twisting a plurality of strands (strands). Thereby, the surface shape of each main rope 7 is a concavo-convex shape in which a plurality of convex portions are arranged at a constant interval (a constant pitch) in the length direction of the main rope 7. When the main ropes 7 move in contact with the hoistway equipment (for example, an elevator support structure) 26 installed in the hoistway 1 (ie, slide), the surface of the main rope 7 is Each convex part periodically contacts the hoistway device 26. Thereby, when the main rope 7 slides with respect to the hoistway device 26, among the vibration components included in the vibration of the main rope 7, the period in which each convex portion on the surface of the main rope 7 contacts the hoistway device 26. The vibration component of the frequency based on (single frequency) becomes large. That is, when the main rope 7 slides with respect to the hoistway device 26, a vibration component due to the surface shape of the main rope 7 increases.

  A pair of car suspension wheels 8 are provided at the lower part of the car 2. On the upper part of the counterweight 3, a counterweight suspension vehicle 9 is provided. A car-side return wheel 10 and a counterweight-side return wheel 11 are provided at the upper part of the hoistway 1. Furthermore, on the upper part of the hoistway 1, there are provided a first rope stopping device 12 to which one end portion of each main rope 7 is connected and a second rope stopping device 13 to which the other end portion of each main rope 7 is connected. It has been.

  Each main rope 7 is wound from the first rope stopping device 12 in the order of each car suspension car 8, car side return wheel 10, drive sheave 6, counterweight side return wheel 11, and counterweight suspension car 9. The second rope stopping device 13 is reached.

  In addition, a speed governor 14 that is operated when the speed of the car 2 exceeds a set overspeed is provided at the upper part of the hoistway 1. The governor 14 includes a governor body 15 and a governor sheave 16 that can rotate with respect to the governor body 15. A tension wheel 17 is provided at the lower part of the hoistway 1. A governor rope 18 that moves as the car 2 moves is wound between the governor sheave 16 and the tension wheel 17. One end and the other end of the governor rope 18 are connected to an operating lever 19 provided on the car 2.

  The governor rope 18 is configured by twisting a plurality of strands (strands). Thereby, the surface shape of the governor rope 18 is a concavo-convex shape in which a plurality of convex portions are arranged at regular intervals (constant pitch) in the length direction of the governor rope 18. When the governor rope 18 moves while contacting the hoistway equipment (for example, an elevator support structure) 27 installed in the hoistway 1 (that is, when sliding), the governor rope 18 is moved. Each convex part of the surface of this will contact | abut the hoistway apparatus 27 periodically. Thereby, when the governor rope 18 slides with respect to the hoistway device 27, among the vibration components included in the vibration of the governor rope 18, each convex portion on the surface of the governor rope 18 is the hoistway. A vibration component having a frequency (single frequency) based on the period of contact with the device 27 increases. That is, when the governor rope 18 slides with respect to the hoistway device 27, a vibration component due to the surface shape of the governor rope 18 increases.

  The diameter of each strand that constitutes the governor rope 18 is smaller than the diameter of each strand that constitutes the main rope 7. Further, the pitch between the convex portions on the surface of the governor rope 18 is smaller than the pitch between the convex portions on the surface of the main rope 7. That is, the surface shapes of the main rope 7 and the governor rope 18 are different from each other. Therefore, the frequency of the vibration component due to the surface shape of the main rope 7 and the frequency of the vibration component due to the surface shape of the governor rope 18 are different from each other.

  The hoisting machine 4 is provided with a hoisting machine encoder 20 that generates a signal corresponding to the rotation of the drive sheave 6. The speed governor 14 is provided with a speed governor encoder 21 that generates a signal corresponding to the rotation of the speed governor sheave 16. The positions and speeds of the car 2 and the counterweight 3 are obtained from information from the hoisting machine encoder 20 and the governor encoder 21.

  The first rope stopping device 12 is provided with an acceleration sensor 22 for measuring the vibration of one end of the main rope 7. Further, the car 2 is provided with an acceleration sensor 23 for measuring the vibration of the car 2. Further, the car 2 is provided with a microphone 24 for measuring the sound in the car 2. The building is provided with a shake detection device (for example, an earthquake sensing device) 25 for detecting the shake of the building. The shake detection device 25 outputs a shake detection signal when the magnitude of the building shake reaches a predetermined set value due to, for example, an earthquake or a strong wind.

  Each vibration of the main rope 7 and the governor rope 18 is transmitted to the acceleration sensor 22 through the common main rope 7. In addition, vibrations of the main rope 7 and the governor rope 18 are transmitted to the acceleration sensor 23 via the car 2. Thereby, in the acceleration sensors 22 and 23, the vibration based on the combined vibration obtained by combining the vibrations of the main rope 7 and the governor rope 18 is measured. Furthermore, the sound generated by the vibration of the car 2 is transmitted to the microphone 24. Thereby, in the microphone 24, the sound based on the synthetic vibration of the main rope 7 and the governor rope 18 is measured.

  Information from each of the hoisting machine encoder 20, the governor encoder 21, the acceleration sensors 22 and 23, the microphone 24, and the shake detection device 25 is transmitted to a control panel provided in the hoistway 1. The control panel controls the operation of the elevator based on information from each of the hoisting machine encoder 20, the governor encoder 21, the acceleration sensors 22 and 23, the microphone 24, and the shake detection device 25.

  The control panel is equipped with an abnormality detection device 28 for detecting whether there is an abnormality in the elevator. The abnormality detection device 28 can be switched between a normal operation mode for performing normal operation of the elevator and an inspection operation mode for performing inspection operation for detecting the presence or absence of abnormality of the elevator. During the inspection operation, the car 2 is moved from one of the uppermost floor and the lowermost floor to the other at a lower speed than the speed of the car 2 during normal operation. Further, the abnormality detection device 28 switches between the normal operation mode and the inspection operation mode based on the information from the shake detection device 25. That is, the abnormality detection device 28 switches from the normal operation mode to the inspection operation mode by receiving the shake detection signal from the shake detection device 25.

  In addition, the abnormality detection device 28 includes a vibration detection unit 29, a frequency analysis unit 30, and a determination unit 31. The processing by the vibration detection unit 29, the frequency analysis unit 30, and the determination unit 31 is performed while the car 2 is moved during the inspection operation.

  The vibration detection unit 29 detects the combined vibrations of the main ropes 7 and the governor rope 18 based on information from the acceleration sensors 22 and 23 and the microphone 24. The combined vibration of each main rope 7 and governor rope 18 is individually detected for each piece of information from the acceleration sensors 22 and 23 and the microphone 24.

  The frequency analysis unit 30 performs frequency analysis on the combined vibration of each main rope 7 and the governor rope 18 based on information from the vibration detection unit 29. Thereby, the relationship between the vibration component contained in the combined vibration of each main rope 7 and the governor rope 18 and the frequency is obtained. The frequency analysis is performed for each of the three combined vibrations based on information from each of the acceleration sensors 22 and 23 and the microphone 24.

  The determination unit 31 includes a predetermined frequency region including a vibration component frequency (single frequency of the main rope 7) caused by the surface shape of the main rope 7 and a vibration component frequency caused by the surface shape of the governor rope 18. A predetermined frequency region including (the specific frequency of the governor rope 18) is set in advance as a determination region. The specific frequencies of the main rope 7 and the governor rope 18 change according to the speed of the car 2. Accordingly, each determination region is a frequency region when the car 2 is moved at the speed during the inspection operation.

  In addition, the determination unit 31 compares the magnitude of the vibration component obtained by the frequency analysis of the frequency analysis unit 30 with a predetermined reference value in each determination region, so that the main ropes 7 and the governor ropes 18 At least one of the hoistway devices 26 and 27 is determined whether or not it is caught. That is, the determination unit 31 raises or lowers at least one of the ropes 7 and 18 based on the information from the frequency analysis unit 30 when the magnitude of the vibration component in each determination region exceeds a predetermined reference value. When it is determined that there is a catch on the road devices 26 and 27 and the magnitude of the vibration component is below a predetermined reference value in any of the determination regions, the hoistway devices of the ropes 7 and 18 A normal judgment is made that there is no catching on 26,27.

  The abnormality detection device 28 automatically returns the inspection operation mode to the normal operation mode when the determination unit 31 makes a normal determination during the inspection operation, and stops the inspection operation when the determination unit 31 makes an abnormality determination during the inspection operation. The car 2 and the counterweight 3 are stopped from moving, and an alarm is issued to the monitoring center.

  The abnormality detection device 28 is configured by a computer having an arithmetic processing unit (CPU), a storage unit (ROM, RAM, hard disk, etc.) and a signal input / output unit. The functions of the vibration detection unit 29, the frequency analysis unit 30, and the determination unit 31 are realized by a computer of the abnormality detection device 28.

  That is, a control program for realizing the functions of the vibration detection unit 29, the frequency analysis unit 30, and the determination unit 31 is stored in the storage unit of the computer. Information such as a determination area and a predetermined reference value is also stored in the storage unit. The arithmetic processing unit executes arithmetic processing related to the function of the abnormality detection device 28 based on the control program.

  Next, the operation will be described. FIG. 2 is a flowchart for explaining the processing operation of the abnormality detection device 28 of FIG. As shown in the figure, when the magnitude of the building shake due to, for example, an earthquake or strong wind exceeds a set value, a shake detection signal is transmitted from the shake detection device 25 to the abnormality detection device 28. Thereby, the operation of the elevator is a control operation in which the car 2 is stopped at the nearest floor under the control of the control panel. After the car 2 stops at the nearest floor, the elevator operation is switched from the normal operation mode to the inspection operation mode in order to detect whether the main rope 7 or the governor rope 18 is caught on the hoistway devices 26 and 27. It is done. Thereby, the check operation in which the car 2 and the counterweight 3 are moved at a low speed is started (S1).

  During the inspection operation, information from each of the acceleration sensors 22 and 23 and the microphone 24 is input to the vibration detection unit 29 while the car 2 and the counterweight 3 are moved at a low speed. The vibration detection unit 29 detects three vibrations based on information from each of the acceleration sensors 22 and 23 and the microphone 24 (S2).

  Thereafter, frequency analysis by the frequency analysis unit 30 is performed on each vibration detected by the vibration detection unit 29. Thereby, the relationship between the vibration component of each vibration and a frequency is calculated | required (S3).

  Thereafter, in each predetermined determination region, the determination unit 31 determines whether or not the magnitude of the vibration component obtained by the frequency analysis unit 30 exceeds a predetermined reference value (S4).

  As a result, in any of the determination areas, when the magnitude of the vibration component is equal to or less than a predetermined reference value, normality determination is performed by the determination unit 31. Thereafter, when the movement of the car 2 from one of the top floor and the bottom floor to the other is completed, the elevator operation mode is automatically returned from the inspection operation mode to the normal operation mode, and normal operation is performed (S5). .

  On the other hand, if the magnitude of the vibration component exceeds a predetermined reference value in at least one of the determination areas, the abnormality determination is performed by the determination unit 31. Thereby, the inspection operation is stopped by the abnormality detection device 28, and the movement of the car 2 and the counterweight 3 is stopped. At this time, an alarm is issued from the abnormality detection device 28 to the monitoring center (S6).

  In such an elevator abnormality detection device 28, the frequency analysis is performed on the combined vibration of the main rope 7 and the governor rope 18, and the magnitude of the vibration component obtained by the frequency analysis is determined in a predetermined determination region. By comparing with the predetermined reference value, the presence or absence of the ropes 7 and 18 being caught on the hoistway devices 26 and 27 is determined. It is not necessary to add a new one, and the increase in cost can be suppressed. Moreover, the detection operation of the presence or absence of the ropes 7 and 18 being caught on the hoistway devices 26 and 27 can be repeatedly performed, so that the presence or absence of an abnormality in the elevator can be detected more reliably.

  Moreover, the vibration detection part 29 detects the synthetic vibration of each rope 7 and 18 based on the information from the acceleration sensors 22 and 23 provided in the 1st rope stopping device 12 and the car 2, respectively. Therefore, the combined vibration of the ropes 7 and 18 can be easily detected.

  Moreover, since the vibration detection unit 29 detects the combined vibration of the ropes 7 and 18 based on the information from the microphone 24 for measuring sound, the combined vibration of the ropes 7 and 18 is detected. It can be easily detected.

  In the above example, the microphone 24 measures the sound inside the car 2, but may measure the sound outside the car 2.

  In the above example, the microphone 24 is provided in the car 2, but may be fixed in the hoistway 1. Even in this way, the sound based on the combined vibration of the ropes 7 and 18 can be measured.

Embodiment 2. FIG.
FIG. 3 is a block diagram showing an elevator provided with an abnormality detection apparatus according to Embodiment 2 of the present invention. In the figure, the first rope stopping device 12 is provided with a scale device 41 for detecting a load (weight) in the car 2. The scale device 41 is a displacement sensor that generates a signal corresponding to the displacement of one end of the main rope 7. Further, the hoisting machine 4 is provided with a torque current measuring device 42 for measuring the torque current flowing through the motor.

  Information from each of the shake detection device 25, the hoisting machine encoder 20, the governor encoder 21, the microphone 24, the scale device 41, and the torque current measurement device 42 is transmitted to the abnormality detection device 28. Based on information from the hoisting machine encoder 20, the speed governor encoder 21, the microphone 24, the scale device 41, and the torque current measuring device 42, the vibration detection unit 29 is configured to control the main rope 7 and the speed governor rope 18. Detect synthetic vibration. The combined vibrations of the main rope 7 and the governor rope 18 are individually detected for each information from the hoisting machine encoder 20, the governor encoder 21, the microphone 24, the scale device 41, and the torque current measuring device 42. The Other configurations and operations are the same as those in the first embodiment.

  In this way, the vibration detection unit 29 is based on the information from at least one of the hoisting machine encoder 20, the governor encoder 21, the microphone 24, the scale device 41, and the torque current measuring device 42, and the main ropes 7 and Since the combined vibration of the governor rope 18 is detected, the combined vibration of the ropes 7 and 18 is detected based on the information from the existing detection device without adding a new detection device. It is possible to further suppress the increase in cost.

  In the above example, the vibration detection unit 29 detects the combined vibration of the ropes 7 and 18 based only on information from the existing detection device. However, the acceleration shown in the first embodiment is not limited. The information from the sensors 22 and 23 may be added to the information from the existing detection device to detect the combined vibration of the ropes 7 and 18. If it does in this way, the reliability of the detection of the catch to the hoistway equipment 26 and 27 of each rope 7 and 18 can further be improved.

Embodiment 3 FIG.
FIG. 4 is a block diagram showing an elevator provided with an abnormality detection apparatus according to Embodiment 3 of the present invention. In the figure, the abnormality detection device 28 includes a vibration detection unit 29, a frequency analysis unit 30, a determination unit 31, and an estimation unit 45. The configurations of the vibration detection unit 29 and the frequency analysis unit 30 are the same as those in the second embodiment.

  In the determination unit 31, a frequency region including the frequency of the vibration component due to the surface shape of the main rope 7 is preset as the main rope determination region, and includes the frequency of the vibration component due to the surface shape of the governor rope 18. The frequency region is preset as the governor rope determination region. Other configurations of the determination unit 31 are the same as those in the second embodiment.

  The estimation unit 45 is operated when the determination unit 31 performs abnormality determination. The estimation unit 45 estimates an abnormal rope estimation unit 46 that estimates a rope (abnormal rope) caught on the hoistway device out of the main rope 7 and the governor rope 18 and estimates a position (abnormal position) of the abnormal rope. And an abnormal position estimation unit 47 that performs the above.

  The abnormal rope estimation unit 46 estimates an abnormal rope based on the information from the determination unit 31. That is, the abnormal rope estimation unit 46 selects and selects a determination region in which the magnitude of the vibration component obtained by frequency analysis exceeds a predetermined reference value from the main rope determination region and the governor rope determination region. The rope corresponding to the determined determination area is estimated as an abnormal rope.

  Here, FIG. 5 is a graph showing an example of the relationship between the vibration component and the frequency obtained by the frequency analysis unit 30 of FIG. As shown in the figure, the magnitude of the vibration component is less than a predetermined reference value in the main rope determination area 48 and exceeds a predetermined reference value in the governor rope determination area 49. In such a case, the abnormal rope estimation unit 46 selects the governor rope determination region 49 in which the magnitude of the vibration component exceeds the reference value, and the rope corresponding to the selected governor rope determination region 49, that is, The governor rope 18 is estimated as an abnormal rope.

  The abnormal position estimation unit 47 acquires information from the microphone 24 from the vibration detection unit 29. The information acquired by the abnormal position estimation unit 47 from the vibration detection unit 29 is information on the sound level continuously measured by the microphone 24 when the car 2 is moved during the inspection operation. The abnormal position estimation unit 47 estimates the abnormal position based on the change in sound level when the car 2 is moved. That is, the abnormal position estimation unit 47 estimates the position of the car 2 when the sound level is relatively high as the abnormal position within the range in which the car 2 is moved.

  FIG. 6 is a graph for comparing the relationship between an example of the temporal change in the sound level measured by the microphone 24 of FIG. 4 and the temporal change in the position of the car 2. As shown in the figure, in this example, the sound level measured by the microphone 24 is higher when the car 2 is near the second floor than when the car 2 is in another position. Thereby, the abnormal position estimation unit 47 estimates a position near the second floor as an abnormal position. The abnormal position does not have to be an accurate position, and may be an approximate position such as the vicinity of the second floor.

  Information on the abnormal rope estimated by the abnormal rope estimation unit 46 and information on the abnormal position estimated by the abnormal position estimation unit 47 are transmitted to the monitoring center. Thereby, each information of an abnormal rope and an abnormal position will be utilized for the maintenance work of a maintenance worker. Other configurations are the same as those of the second embodiment.

  In such an elevator abnormality detection device 28, a determination region in which the magnitude of the vibration component exceeds a predetermined reference value is selected from the main rope determination region 48 and the governor rope determination region 49, and the selected determination is performed. Since the rope corresponding to the area is estimated as an abnormal rope, it is possible to determine which rope is hooked to the hoistway equipment, and to improve the efficiency of restoration work by maintenance personnel be able to.

  In addition, the sound level is measured by the microphone 24 provided in the car 2, and the abnormal position is estimated based on the change in the sound level when the car 2 is moved. It is possible to determine the approximate position where the object is caught and to improve the efficiency of restoration work by maintenance personnel.

  In the above example, one type of inspection operation for moving the car 2 at low speed is performed to determine whether there is an abnormality in the elevator, but multiple types of inspection for moving the car 2 at different speeds. You may make it determine the presence or absence of abnormality of an elevator by driving | running | working. In this case, the determination areas are different frequency areas for each inspection operation.

  FIG. 7 is a graph showing an example of the relationship between the vibration component and the frequency when the speed of the car 2 during the inspection operation by the abnormality detection device 28 of FIG. 4 is 60 m / min. FIG. 8 is a graph showing an example of the relationship between the vibration component and the frequency when the speed of the car 2 during the inspection operation by the abnormality detection device 28 of FIG. 4 is 30 m / min. Further, FIG. 9 is a graph showing an example of the relationship between the vibration component and the frequency when the speed of the car 2 during the inspection operation by the abnormality detection device 28 of FIG. 4 is 15 m / min. The determination region shown in FIGS. 7 to 9 is a governor rope determination region 49.

  As shown in the figure, when the governor rope 18 is hooked on the hoistway device 27, the specific frequency of the governor rope 18 changes according to the speed of the car 2. Therefore, by detecting that the specific frequency of the governor rope 18 changes according to the speed of the car 2, it is possible to more reliably detect that the governor rope 18 is caught by the hoistway device 27. it can. Thus, for example, a plurality of types of inspection operations are performed in which the car 2 is moved at each speed of 15, 30, and 60 m / min, and the abnormal frequency of the abnormal rope varies according to the speed of the car 2 for each inspection operation. After confirming the above, the determination unit 31 may perform abnormality determination.

It is a block diagram which shows the elevator provided with the abnormality detection apparatus by Embodiment 1 of this invention. It is a flowchart for demonstrating the processing operation of the abnormality detection apparatus of FIG. It is a block diagram which shows the elevator provided with the abnormality detection apparatus by Embodiment 2 of this invention. It is a block diagram which shows the elevator provided with the abnormality detection apparatus by Embodiment 3 of this invention. It is a graph which shows an example of the relationship between the vibration component and frequency which were calculated | required by the frequency analysis part of FIG. 5 is a graph for comparing a relationship between an example of a temporal change in sound level measured by the microphone of FIG. 4 and a temporal change in car position. It is a graph which shows an example of the relationship between the vibration component and frequency when the speed of the cage | basket | car at the time of the inspection driving | operation by the abnormality detection apparatus of FIG. 4 is 60 m / min. It is a graph which shows an example of the relationship between a vibration component and frequency when the speed of the cage | basket | car at the time of the inspection driving | operation by the abnormality detection apparatus of FIG. 4 is 30 m / min. It is a graph which shows an example of the relationship between a vibration component and frequency when the speed of the cage | basket | car at the time of the inspection driving | operation by the abnormality detection apparatus of FIG. 4 is 15 m / min.

Explanation of symbols

  2 cages, 7 main ropes, 12 first rope anchoring device, 18 governor ropes, 22, 23 acceleration sensors, 24 microphones, 26, 27 hoistway equipment, 29 vibration detection units, 30 frequency analysis units, 31 determination units, 45 Estimator.

Claims (5)

A vibration detector that detects the vibration of the rope that moves as the car moves;
Based on the information from the vibration detection unit, a frequency analysis unit that performs frequency analysis on the vibration of the rope, and among the vibration components of the rope when moving while contacting the hoistway device, the surface shape of the rope A predetermined frequency region including the frequency of the vibration component resulting from the above is set in advance as a determination region, and in the determination region, the magnitude of the vibration component obtained by the frequency analysis is compared with a predetermined reference value, A determination unit for determining whether the rope is caught on the hoistway device ,
Perform multiple types of inspection operation to move the car at different speeds,
An elevator abnormality detection device , wherein different frequency regions according to the speed of the car are set as the determination region for each inspection operation . The vibration detection unit detects a combined vibration of a plurality of different ropes,
The determination unit compares the magnitude of the vibration component determined by the frequency analysis with a predetermined reference value in each of the plurality of determination regions corresponding to the ropes,
Among the determination areas, the determination area where the magnitude of the vibration component exceeds the predetermined reference value is selected, and the rope corresponding to the selected determination area is a rope hooked on the hoistway device. The apparatus for detecting an abnormality of an elevator according to claim 1, further comprising: an abnormal rope estimation unit for estimating.   The vibration detection unit detects vibration of the rope based on information from an acceleration sensor provided in at least one of the rope stopping device to which the end of the rope is connected and the car. The elevator abnormality detection device according to claim 1.   The elevator abnormality detection device according to claim 1, wherein the vibration detection unit detects vibration of the rope based on information from a microphone for measuring sound. The microphone is provided in the basket,
The elevator according to claim 4, further comprising an abnormal position estimation unit that estimates a position of the hook of the rope based on a change in the sound level when the car is moved. Anomaly detection device.

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