Elevator diagnostic device and elevator diagnostic method

Abstract

The invention relates to an elevator diagnosis device and an elevator diagnosis method, which can diagnose a diagnosis object of an elevator without worsening operability. The elevator diagnostic device diagnoses an object to be diagnosed of an elevator by means of non-contact vibration measurement, and is provided with: a radar for obtaining a measurement signal including a vibration component of the object; a determination unit that determines filter settings for separating vibration components by different distances and / or different orientations with respect to a measurement signal obtained using the radar; a separation unit that separates the vibration component while shifting the determined filter setting; an extraction unit that extracts the vibration component of the object to be diagnosed by comparing the change over time of the vibration component separated by the separation unit with the operation information of the elevator acquired by the acquisition unit; and a diagnosis unit that diagnoses the object to be diagnosed on the basis of the extracted vibration component.

Description

Technical Field

[0001] The invention relates to an elevator diagnostic device and an elevator diagnostic method. Background Art

[0002] During maintenance work on elevators, escalators and other lifting machines, operators sometimes enter the elevator tower or the escalator machine room to perform work. In this case, there are moving objects and rotating objects in the tower or the machine room that operators must avoid contacting. Therefore, during maintenance work on elevators, it is required to avoid danger and improve safety.

[0003] Regarding the maintenance work of elevators, there is a method of diagnosing elevators by using a microphone to collect the sound generated in the tower or the machine room. For example, Patent Document 1 describes a method of arranging a microphone in the elevator tower and using the microphone to collect the operating sound of the equipment to detect abnormalities. However, if this method is applied to a space surrounded by walls such as the tower or the machine room, the sound is reflected by the wall, so it is difficult to determine the cause of the abnormality only by the collected sound.

[0004] On the other hand, as a non-contact method capable of measuring the vibration of an object within a measurement range, there is a method using a millimeter wave radar. For example, Patent Document 2 describes a method of using a millimeter wave radar to non-contactly measure biological signals of multiple parts of a human body of a person being measured.

[0005] Prior art literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2009-274805

[0007] Patent Document 2: Japanese Patent Application Publication No. 2022-21422 Summary of the invention

[0008] Problems to be solved by the invention

[0009] The tower and the machine room of the elevator become spaces enclosed by walls. In addition, multiple devices that can be the subject of maintenance and diagnosis are arranged in the tower and the machine room. When the millimeter-wave radar is used to diagnose the elevator, vibration data reflecting the vibrations of multiple objects is obtained. However, the vibration components of multiple objects are mixed in the vibration data. Therefore, in order to determine (extract) the vibration data of the diagnostic object from the vibration data, for example, the operator needs to use a measuring instrument to measure the distance from the millimeter-wave radar to the diagnostic object. Therefore, in the technology of using millimeter-wave radar to diagnose the elevator, there is a problem such as deterioration of operability.

[0010] An object of the present invention is to provide an elevator diagnostic device and an elevator diagnostic method that are capable of diagnosing a diagnostic object of an elevator without deteriorating operability.

[0011] Means for solving problems

[0012] In order to solve the above-mentioned problems, for example, the configuration described in the claims is adopted.

[0013] The present application includes multiple means for solving the above-mentioned problems. If one of them is listed, it is an elevator diagnostic machine that diagnoses the diagnostic object of the elevator through non-contact vibration measurement, which comprises: a radar, which is used to obtain a measurement signal containing vibration components of an object existing in the measurement range; a determination unit, which determines the filter setting for separating the vibration components at different distances and / or different orientations with respect to the measurement signal obtained using the radar; a separation unit, which separates the vibration components while staggering the filter setting determined by the determination unit; an acquisition unit, which acquires the operating information of the elevator; an extraction unit, which extracts the vibration components of the diagnostic object by comparing the time-dependent changes of the vibration components separated by the separation unit with the operating information; and a diagnosis unit, which diagnoses the diagnostic object based on the vibration components extracted by the extraction unit.

[0014] Effects of the Invention

[0015] According to the present invention, it is possible to diagnose the object to be diagnosed of the elevator without deteriorating the workability.

[0016] The other problems, structures, and effects than those described above will become clear from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram showing an example of an elevator diagnosed by the elevator diagnostic device according to the embodiment.

[0018] Figure 2 This is a block diagram showing a configuration example of the elevator diagnostic device according to the first embodiment.

[0019] Figure 3 is a schematic diagram showing a measurement signal obtained using a radar.

[0020] Figure 4 It is a schematic diagram showing an example of filter setting determined by the determination unit.

[0021] Figure 5 This is a schematic diagram showing an example of dividing the radar measurement range by filter setting.

[0022] Figure 6 This is a schematic diagram for explaining the process of separating vibration components while shifting filter settings.

[0023] Figure 7 This is a diagram showing an example of changes in vibration power over time.

[0024] Figure 8 This is a diagram showing an example of a change in vibration frequency over time.

[0025] Fig. 9 This is a flowchart showing the elevator diagnostic method according to the first embodiment.

[0026] Fig.10 This is a diagram showing an example of the change over time of the first vibration frequency.

[0027] Fig.11 This is a diagram showing an example of the change over time of the second vibration frequency. DETAILED DESCRIPTION

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, elements having substantially the same function or structure are denoted by the same reference numerals, and repeated descriptions are omitted.

[0029] Figure 1 1 is a schematic diagram showing an example of an elevator to be diagnosed by the elevator diagnosis device according to the embodiment. Figure 1 In the figure, an elevator is shown as an example of a lift, but an escalator or the like may also be used.

[0030] exist Figure 1 In the figure, the elevator 10 includes a traction machine 11 , a car 12 , a counterweight 13 , and a rope 14 .

[0031] The hoisting machine 11 is installed at the bottom of the hoistway. The hoisting machine 11 has a motor as a driving source and a sheave that rotates by the drive of the motor. A rope 14 is wound around the sheave of the hoisting machine 11 in a U shape. The hoisting machine 11 winds up the rope 14 by the rotation of the sheave, thereby raising and lowering the car 12 and the counterweight 13 in the hoistway. At this time, the car 12 and the counterweight 13 move in opposite directions to each other.

[0032] The car 12 moves in the vertical direction in the hoistway while being guided by a pair of car guide rails (not shown). The car 12 has two car pulleys 16. The two car pulleys 16 are attached to the lower part of the car 12. The rope 14 is wound around each car pulley 16.

[0033] The counterweight 13 moves in the vertical direction in the hoistway while being guided by a pair of counterweight guide rails (not shown). The counterweight 13 has a counterweight pulley 17. The counterweight pulley 17 is mounted on the upper portion of the counterweight 13. The rope 14 is wound around the counterweight pulley 17.

[0034] In addition to the above-mentioned sheave, car pulley 16 and balance pulley 17, the rope 14 is also hung on two pulleys 18 and 19. The two pulleys 18 and 19 are arranged at the top of the hoistway. The rope 14 is hung on the car pulley 16 from the sheave via the pulley 18. In addition, the rope 14 is hung on the balance pulley 17 from the sheave via the pulley 19. In addition, the two ends of the rope 14 in the length direction are fixed to the top of the hoistway.

[0035] In the elevator 10 having the above-described structure, when the sheave of the traction machine 11 is rotated in the clockwise direction of the figure, the car 12 moves downward in the hoistway, and the counterweight 13 moves upward in the hoistway. In addition, when the sheave of the traction machine 11 is rotated in the counterclockwise direction of the figure, the car 12 moves upward in the hoistway, and the counterweight 13 moves downward in the hoistway. The movement of the elevator 10 is controlled by a control unit (control panel, etc.) not shown in the figure. The control unit of the elevator 10 uniformly controls the movement of the elevator 10 including the lifting movement of the car 12, the opening and closing movement of the car door, etc.

[0036] <First embodiment>

[0037] Figure 2 This is a block diagram showing a configuration example of the elevator diagnostic device according to the first embodiment.

[0038] Figure 2 The elevator diagnostic device 20 shown diagnoses the diagnostic object of the elevator by non-contact vibration measurement. Diagnosis refers to investigating and determining whether a certain abnormality has occurred. The elevator diagnostic device 20 has a radar 21 and a diagnostic control unit 22. The radar 21 is used to obtain a measurement signal including a vibration component of an object present within the measurement range. When there are multiple objects within the measurement range of the radar 21, the measurement signal obtained using the radar 21 includes vibration components of multiple objects. The radar 21 and the diagnostic control unit 22 are electrically connected via a cable not shown in the figure. The cable includes a power cable and a signal cable.

[0039] The radar 21 has a transmitting antenna and a receiving antenna (not shown). The radar 21 transmits radio waves from the transmitting antenna to the object, and receives the radio waves reflected by the object with the receiving antenna. Thus, the radar 21 measures the distance and direction to the object.

[0040] Preferably, the radar 21 is a radar that emits radio waves in the millimeter wave band (wavelength of 1 to 10 mm), that is, a millimeter wave radar. The wavelength of the millimeter wave radar is short, so it can measure the distance to the object with high resolution and high accuracy. In addition, when the millimeter wave radar is used as the radar 21, the vibration of the object is calculated as a small change in the distance to the object, and the inverse of the period of the small change in the distance is calculated as the frequency of the vibration.

[0041] When a millimeter wave radar is used as the radar 21, the frequency modulation method of the radar is preferably an FMCW (frequency continuous modulation) method. By modulating the frequency of the radar 21 in an FMCW method, the distance and / or direction to multiple objects (objects) present in the measurement range can be measured simultaneously. In addition, in the FMCW method, after the IF signal generated by synthesizing the transmission signal and the reception signal is digitized by an A / D converter, the IF signal is subjected to FFT (Fast Fourier Transform) processing, thereby detecting the distance to the object, the direction of the object, and the vibration of the object. As a result, the measurement signal obtained using the radar 21 becomes a signal including the components of the distance to the object, the direction of the object, and the vibration of the object.

[0042] Furthermore, in order to detect the direction of the object, the radar 21 needs to have at least two receiving antennas. In addition, the A / D converter for digitizing the IF signal and the processor unit for FFT processing may be provided in the radar 21 or in the diagnosis control unit 22.

[0043] In this embodiment, as an example, it is assumed that Figure 1 As shown in FIG. 1 , a radar 21 is installed at the bottom of the hoistway of the elevator 10 , and radio waves are emitted from the radar 21 toward the hoisting machine 11 .

[0044] The diagnosis control unit 22 includes: a determination unit 25 that determines the filter setting for separating the vibration component; a separation unit 26 that separates the vibration component from the above-mentioned measurement signal; an acquisition unit 27 that acquires the operation information of the elevator 10; an extraction unit 28 that extracts the vibration component of the object to be diagnosed; a diagnosis unit 29 that diagnoses the object to be diagnosed; and a communication unit 30 that sends the diagnosis result of the diagnosis unit 29 to the outside. The diagnosis control unit 22 includes a CPU (Central Processing Unit, central processing unit), ROM (Read Only Memory, read-only memory), and RAM (Random Access Memory) as hardware resources of the computer, which are not shown in the figure. In addition, each functional unit of the diagnosis control unit 22 is realized by the CPU reading the program stored in the ROM to the RAM and executing it.

[0045] The determination unit 25 takes in the measurement signal obtained using the radar 21 , and determines filter settings for separating vibration components at different distances and different directions with respect to the taken-in measurement signal.

[0046] Figure 3 is a schematic diagram showing a measurement signal obtained using a radar.

[0047] like Figure 3As shown, the measurement signal 40 includes the components of distance, direction and vibration. In addition, the measurement signal 40 includes time information in order to grasp the temporal changes of the vibration components. The vibration components are represented by vibration power, vibration frequency, etc. The vibration power refers to the size of the vibration, that is, the amplitude.

[0048] Figure 4 It is a schematic diagram showing an example of filter setting determined by the determination unit.

[0049] like Figure 4 As shown, the determination unit 25 determines filter settings for each of the physical quantity such as distance and the physical quantity such as direction with respect to the measurement signal 40 obtained using the radar 21 .

[0050] For example, regarding distance, Figure 5 As shown in FIG. 1 , when the measurement signal 40 is obtained within the range from the radar 21 to the distance L, the decision unit 25 determines the filter setting so that the distance L is divided into a plurality of pieces at a predetermined interval within the range and the vibration component is extracted according to the divided distances. Figure 5 As shown in FIG. 1 , when the measurement signal 40 is obtained within the range from +θ to -θ, the decision unit 25 determines the filter setting so that the azimuth is divided into a plurality of azimuths at a predetermined interval within the range and the vibration component is extracted according to the divided azimuths. The predetermined interval for dividing the distance is preset according to the resolution of the radar 21 when measuring the distance, and the predetermined interval for dividing the azimuth is preset according to the resolution of the radar 21 when measuring the azimuth.

[0051] The separation unit 26 separates the vibration components while shifting the filter setting determined by the determination unit 25. Specifically, regarding the distance, Figure 6 As shown in FIG. 1 , the separation unit 26 separates the vibration components belonging to each distance while shifting the filter settings determined by the determination unit 25 in sequence as shown by arrows on the axis of the physical quantity such as distance. Figure 6 As shown, the separation unit 26 separates the vibration components belonging to each direction while sequentially shifting the filter settings determined by the determination unit 25 as indicated by arrows on the axis of a physical quantity such as direction.

[0052] In this embodiment, it is assumed that the decision unit 25 determines the filter settings according to different distances and different directions. Figure 5 As shown in FIG. 1 , the separation unit 26 separates the vibration components according to the distance after the division and according to the direction. The order of separation can be set arbitrarily. Thus, for example, the mth separated vibration component becomes Figure 5When the measurement range of the radar 21 is divided into a total of n regions according to the filter setting determined by the determination unit 25 , the vibration components included in the measurement signal 40 are separated into n regions by the separation unit 26 .

[0053] At this time, if the entire measurement range of the radar 21 is taken as the object of the filter setting, the number of vibration components separated by the separation unit 26 increases, and therefore, the number of processing performed by the extraction unit 28 increases. As a countermeasure, it is considered that the decision unit 25 narrows the object of the filter setting within the measurement range of the radar 21. Specifically, the decision unit 25 preferably limits the range of the filter setting based on the image information of the elevator. Thereby, the area in the area included in the measurement range of the radar 21, where the diagnostic object should not exist, can be excluded from the object of the filter setting, reducing the number of processing performed by the extraction unit 28. The area where the diagnostic object should not exist is, for example, an area that is closer to the inner side than the wall of the shaft when observed from the installation position of the radar 21. The image information of the elevator can be pre-stored in a memory (not shown) possessed by the diagnosis control unit 22.

[0054] The acquisition unit 27 acquires the operation information of the elevator 10 by a predetermined method. The operation information acquired by the acquisition unit 27 includes the operation start time and the operation stop time of the elevator 10. Various methods of acquiring the operation information can be considered. The first method is to take in the operation information input by the operator. In this case, the operation information can be acquired even if no modification is performed on the elevator 10 side. The second method is to obtain the operation instruction information as the operation information when the acquisition unit 27 itself sends the operation instruction information to the control unit of the elevator 10. In this case, the operation information can be automatically acquired without relying on the input of the operator. The third method is to take in the operation information sent from the control unit of the elevator 10. In this case, the operation information can also be automatically acquired without relying on the input of the operator. In addition, the functional unit that sends the operation instruction information can also be set separately from the acquisition unit 27.

[0055] The extraction unit 28 extracts the vibration component of the object to be diagnosed by comparing the temporal change of the vibration component separated by the separation unit 26 with the operation information acquired by the acquisition unit 27. In addition, when there are multiple objects to be diagnosed within the measurement range of the radar 21, the extraction unit 28 extracts the vibration component for each object to be diagnosed. The specific extraction method is described below.

[0056] First, when the vibration component is represented by vibration power, the extraction unit 28 compares the operation start time and operation stop time included in the operation information with the change in vibration power over time. Figure 7As shown in FIG. 1 , the vibration power of the motor increases in the acceleration interval starting from the operation start time t1. Then, the vibration power of the motor changes at the same level in the constant speed interval. Then, the vibration power of the motor decreases in the deceleration interval for stopping the operation, and converges to the same level as before the operation starts at the operation stop time t2.

[0057] The extraction unit 28 compares the operation start time t1 and the operation stop time t2 contained in the operation information with the time ta when the vibration power starts to increase and the time tb when the vibration power decreases and converges, and when they are substantially consistent (when t1=ta, t2=tb), extracts data representing the time-dependent change of the vibration power as the vibration component of the motor of the traction machine 11.

[0058] On the other hand, when the vibration component is represented by the vibration frequency, the extraction unit 28 compares the operation start time and the operation stop time included in the operation information with the change in the vibration frequency over time. Figure 8 As shown in FIG. 1 , the vibration frequency of the motor increases in the acceleration interval starting from the operation start time t1. Next, the vibration frequency of the motor changes at the same level in the constant speed interval. Next, the vibration frequency of the motor decreases in the deceleration interval for stopping the operation, and converges to the same level as before the operation starts at the operation stop time t2.

[0059] The extraction unit 28 compares the operation start time t1 and the operation stop time t2 contained in the operation information with the time tc when the vibration frequency starts to increase and the time td when the vibration frequency decreases and converges, and when they are substantially consistent (when t1=tc, t2=td), extracts data representing the time-dependent change of the vibration frequency as the vibration component of the motor of the traction machine 11.

[0060] Furthermore, the vibration components separated from the measurement signal 40 by the separation unit 26 are taken out one by one when the filter setting determined by the offset determination unit 25 is set. Therefore, the comparison between the operation information and the vibration components is performed multiple times according to the number of vibration components taken out from the measurement signal 40, wherein the vibration components consistent with the operation information are extracted as the vibration components of the object to be diagnosed.

[0061] The diagnosis unit 29 diagnoses the object to be diagnosed based on the vibration component extracted by the extraction unit 28. For example, when the object to be diagnosed of the elevator 10 is the motor of the traction machine 11, and the vibration component extracted by the extraction unit 28 is the vibration component of the motor, the diagnosis unit 29 diagnoses the motor based on the vibration component extracted by the extraction unit 28. Specifically, when the vibration component of the motor is represented by vibration power, the diagnosis unit 29 compares the waveform data of the vibration power in normal state with the waveform data of the vibration power extracted this time, thereby diagnosing whether the motor has generated abnormal vibration. In addition, when the vibration component of the motor is represented by vibration frequency, the diagnosis unit 29 compares the waveform data of the vibration frequency in normal state with the waveform data of the vibration frequency extracted this time, thereby diagnosing whether the motor has generated abnormal vibration. In addition, the method of diagnosing whether the vibration of the motor is abnormal is not limited to the method of comparing waveform data, and various methods can be used.

[0062] The communication unit 30 sends the diagnosis result of the diagnosis unit 29 to the operator terminal 34 and / or the remote monitoring center 35. The diagnosis result of the diagnosis unit 29 includes data obtained by corresponding the vibration component used for diagnosis with information (distance, direction, etc.) for determining the position of the diagnostic object from which the vibration component is extracted. The operator terminal 34 is a terminal device (for example, a notebook PC, a tablet computer, etc.) held by an operator who uses the elevator diagnostic device 20 to diagnose the elevator. The remote monitoring center 35 is set up in a place away from the building where the elevator 10 is installed, and monitors the status of the main equipment of the elevator 10. When the diagnosis result is prompted to the operator on site, it is preferred to send the diagnosis result from the communication unit 30 to the operator terminal 34. As a result, the operator can confirm the diagnosis result displayed on the operator terminal 34 and take necessary measures immediately.

[0063] In addition, when the elevator diagnostic device 20 is always installed in the elevator such as the elevator 10, it is preferable to send the diagnostic result from the communication unit 30 to the remote monitoring center 35. A central terminal for remote monitoring is provided in the remote monitoring center 35, and the diagnostic result is transmitted from the communication unit 30 to the central terminal of the remote monitoring center 35 via the communication line. As a result, the operator does not need to go to the site for diagnosis. In addition, it is possible to issue a confirmation instruction to the operator located near the site.

[0064] Furthermore, the diagnosis result of the diagnosis unit 29 may be transmitted to the remote monitoring center 35 via the control unit of the elevator 10. In addition, the communication between the control unit of the elevator 10 and the diagnosis control unit 22 of the elevator diagnosis device 20 is preferably performed by wireless communication so that it can be completed even if the wiring for communication is not laid out.

[0065] Fig. 9This is a flowchart showing the elevator diagnostic method according to the first embodiment.

[0066] First, the diagnosis control unit 22 performs measurement by the radar 21 (step S1 ).

[0067] Next, the determination unit 25 takes in the measurement signal obtained by using the radar 21, and determines the filter setting for the vibration component at different distances and different directions for the taken-in measurement signal (step S2). The specific determination method is as described above.

[0068] Next, the separation unit 26 separates the vibration component while shifting the filter setting determined by the determination unit 25 (step S3). The specific separation method is as described above.

[0069] Next, the acquisition unit 27 acquires the operation information of the elevator 10 (step S4). The operation information of the elevator 10 may be acquired at any timing as long as it is before the processing of step S5 described later is performed.

[0070] Next, the extracting unit 28 extracts the vibration component of the object to be diagnosed by comparing the temporal change of the vibration component separated by the separating unit 26 with the operation information acquired by the acquiring unit 27 (step S5). The specific extraction method is as described above.

[0071] Next, the diagnosis unit 29 diagnoses the object to be diagnosed based on the vibration component extracted by the extraction unit 28 (step S6). The specific diagnosis method is as described above.

[0072] Next, the communication unit 30 transmits the diagnosis result of the diagnosis unit 29 to the outside (step S6). The diagnosis result may be transmitted to only the operator terminal 34, only the remote monitoring center 35, or both the operator terminal 34 and the remote monitoring center 35.

[0073] As described above, according to the elevator diagnostic device 20 and the elevator diagnostic method of the present embodiment, the operation information of the elevator (the elevator 10 in the present embodiment) can be used to extract the vibration component of the object to be diagnosed from the measurement signal 40 obtained using the radar 21. As a result, the operator does not need to use a measuring instrument to measure the distance from the radar 21 to the object to be diagnosed, etc. Therefore, the object to be diagnosed of the elevator can be diagnosed without deteriorating the operability. In addition, when the radar 21 is installed at a specified location of the elevator, the measurement signal required for the diagnosis is obtained by non-contact vibration measurement using the radar 21. Therefore, the safety of the operator can be ensured.

[0074] <Second embodiment>

[0075] Next, a second embodiment of the present invention will be described. The elevator diagnostic device and the elevator diagnostic method of the second embodiment differ from those of the first embodiment in that the elevator operation information acquired by the acquisition unit 27 and the method of extracting the vibration component of the diagnostic object by the extraction unit 28 are different.

[0076] The operation information of the elevator acquired by the acquisition unit 27 includes, in addition to the operation start time and the operation stop time described above, a first operation speed and a second operation speed. When the elevator is the elevator 10, the first operation speed and the second operation speed are both the rotation speed of the motor of the traction machine 11. The rotation speed of the motor of the traction machine 11 is proportional to the lifting speed of the car 12. Therefore, the first operation speed and the second operation speed may also be the lifting speed of the car 12.

[0077] The first operating speed and the second operating speed are different speeds. As a specific example, the first operating speed is an operating speed applied during normal operation, while the second operating speed is an operating speed applied during maintenance operation. The operating speed applied during maintenance operation is slower than the operating speed applied during normal operation.

[0078] On the other hand, the extraction unit 28 extracts the vibration component of the diagnosis object by comparing the ratio of the first operating speed to the second operating speed and the ratio of the first vibration frequency obtained when the elevator is operated at the first operating speed to the second vibration frequency obtained when the elevator is operated at the second operating speed.

[0079] For example, consider the following situation: Fig.10 The waveform shown in FIG. 1 represents a first vibration frequency obtained when the motor of the traction machine 11 is driven at a first operating speed applied during normal operation. Fig.11 The waveform shown represents the second vibration frequency obtained when the motor of the traction machine 11 is driven at the second operating speed applied during maintenance operation. In this case, if the first operating speed is set to V1 and the second operating speed is set to V2, the extraction unit 28 obtains the ratio of the first operating speed V1 to the second operating speed V2 (hereinafter also referred to as the "operating speed ratio"). In addition, the extraction unit 28 obtains the first vibration frequency F1 ( Fig.10 ) and the second vibration frequency F2 in the constant speed interval ( Fig.11 ) (hereinafter also referred to as "vibration frequency ratio"). At this time, the extraction unit 28 determines the constant speed interval by referring to the operation start time and the operation stop time included in the operation information. And, when the vibration frequency ratio is consistent with the operation speed ratio, the extraction unit 28 extracts data representing the temporal change of the vibration frequency as the vibration component of the motor of the traction machine 11.

[0080] Thus, also in the second embodiment, the vibration component of the object to be diagnosed can be extracted from the measurement signal 40 obtained using the radar 21 using the operation information of the lift (the elevator 10 in this embodiment).

[0081] <Modifications, etc.>

[0082] In addition, the present invention is not limited to the above-mentioned embodiments, and includes various modifications. For example, in the above-mentioned embodiments, the contents of the present invention are described in detail to facilitate understanding, but the present invention is not limited to having all the structures described in the above-mentioned embodiments. In addition, a part of the structure of a certain embodiment can be replaced with the structure of other embodiments. In addition, the structure of other embodiments can also be added to the structure of a certain embodiment. In addition, a part of the structure of each embodiment can also be deleted, or other structures can be added, or replaced with other structures.

[0083] In the above embodiment, the case where the radar 21 is a millimeter wave radar is described as an example, but other than this, for example, a microwave radar can also be applied. In addition, the FMCW method can also be applied to radars other than millimeter wave radars.

[0084] In addition, in the above-mentioned embodiment, the case where the decision unit 25 determines the filter settings according to different distances and different directions is described as an example, but the present invention is not limited thereto, and the decision unit 25 may also determine the filter settings according to different distances or different directions. In the case where the decision unit 25 determines the filter settings according to different distances or different directions, the separation unit 26 Figure 5 The vibration components separated by distance or azimuth are shown in the figure. In this case, the vibration components separated by distance include vibration components obtained from different azimuths, but if the measurement is performed under the condition that the azimuths of the respective diagnostic objects are different when observed from the radar 21, the vibration components of the respective vibrating objects can be extracted separately. Similarly, the vibration components separated by azimuth include vibration components obtained from different distances, but if the measurement is performed under the condition that the distances from the radar 21 to the respective vibrating objects are different, the vibration components of the respective vibrating objects can be extracted separately.

[0085] In the above embodiment, the elevator 10 is cited as an example of an elevator, and the motor of the traction machine 11 is cited as an example of a diagnostic object. However, the elevator and the diagnostic object are not limited thereto. For example, when the elevator is an elevator, the guide roller for raising and lowering the car 12 along the guide rail, the brake of the traction machine 11, etc. can be the diagnostic object. In addition, when the elevator is an escalator, the terminal gear for moving the chain, the bearing of the gear, the bearing of the motor, etc. can be the diagnostic object.

[0086] Description of Reference Numerals

[0087] 10... elevator, 11... traction machine, 20... lift diagnostic device, 21... radar, 22... diagnostic control unit, 25... determination unit, 26... separation unit, 27... acquisition unit, 28... extraction unit, 29... diagnosis unit, 30... communication unit, 34... operator terminal, 35... remote monitoring center.

Claims

1. An elevator diagnostic device, which diagnoses an elevator diagnostic object by non-contact vibration measurement, characterized in that: The elevator diagnostic device comprises: A radar for obtaining a measurement signal including a vibration component of an object present within a measurement range; a determination unit that determines, with respect to a measurement signal obtained using the radar, a filter setting for separating the vibration components according to different distances and / or different orientations; a separation unit that separates the vibration component while shifting the filter setting determined by the determination unit; an acquisition unit configured to acquire operation information of the elevator; an extracting unit that extracts the vibration component of the object to be diagnosed by comparing the temporal change of the vibration component separated by the separating unit with the operation information; A diagnosis unit diagnoses the diagnosis target object based on the vibration component extracted by the extraction unit.

2. The elevator diagnostic device according to claim 1, characterized in that: The acquisition unit acquires the operation information input by an operator.

3. The elevator diagnostic device according to claim 1, characterized in that: The acquisition unit sends operation instruction information to a control unit of the elevator, and acquires the operation instruction information as the operation information.

4. The elevator diagnostic device according to claim 1, characterized in that: The acquisition unit acquires the operation information transmitted from the control unit of the elevator.

5. The elevator diagnostic device according to claim 1, characterized in that: The operation information includes the operation start time and the operation stop time. The extraction unit extracts the vibration component of the diagnosis object by comparing the operation start time and the operation stop time with the temporal change of the vibration power, or by comparing the operation start time and the operation stop time with the temporal change of the vibration frequency.

6. The elevator diagnostic device according to claim 1, characterized in that: The determination unit limits the range of the filter setting based on the image information of the elevator.

7. The elevator diagnostic device according to claim 1, characterized in that: The operation information includes a first operation speed and a second operation speed. The extraction unit extracts the vibration component of the diagnostic object by comparing the ratio of the first operating speed to the second operating speed and the ratio of the first vibration frequency to the second vibration frequency, wherein the first vibration frequency is obtained when the elevator is operated at the first operating speed, and the second vibration frequency is obtained when the elevator is operated at the second operating speed.

8. The elevator diagnostic device according to claim 1, characterized in that: The elevator diagnostic device includes a communication unit that transmits a diagnostic result of the diagnostic unit to a remote monitoring center.

9. A method for diagnosing an elevator by non-contact vibration measurement, characterized in that: The elevator diagnosis method comprises: A step of determining a filter setting for a measurement signal containing a vibration component of an object in order to separate the vibration component at different distances and / or different orientations; a step of separating the vibration component while shifting the determined filter setting; The step of obtaining the operation information of the elevator; A step of extracting a vibration component of the object to be diagnosed by comparing the temporal change of the separated vibration component with the operation information; A step of diagnosing the object to be diagnosed based on the extracted vibration component.

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