JP2009249117A - Wire rope strand disconnection diagnostic system of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire rope strand disconnection diagnostic system of an elevator capable of easily determining whether damage of wire rope is light or serious. <P>SOLUTION: This system has a strand disconnection detection part 6 for detecting a strand disconnection of the wire rope 2 made by twisting a plurality of steel wires, and a display part 9 for displaying a diagnostic result of the strand disconnection of the wire rope 2 according to data detected by the strand disconnection detection part 6, so as to display a strand disconnection status of the wire rope 2 on the display part 9 in separate stages based on a level calculated from a correlation between a strand disconnection output detected by the strand disconnection detection part 6 per constant zone and a number exceeding a threshold value of the output. In this case, a measuring waveform may be displayed on the display part 9 in separate colors for each stage according to a rank of diagnosis. Also, a portion where the strand disconnection occurs, and an elapsed time from a start of measurement may be displayed on the display part 9 correspondingly to the measured waveform. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wire rope strand breakage diagnosis system for an elevator in which a wire rope strand breakage of an elevator is detected by a detection unit and signal processing is performed.

  Generally, a wire rope used for an elevator, a lift, a cable car, a crane, or the like is formed by twisting a plurality of steel wires. As for the wire rope, the steel wire which comprises a wire rope is broken little by little by fatigue and wear. The number of breaks in the structure increases over time, and when the number of breaks exceeds a reference value, it is determined that the wire rope has reached the end of its life and is replaced. Therefore, it is necessary to measure whether or not the wire rope can be used safely by measuring the number of fractures of the steel wire by periodic inspection.

  Conventionally, visual inspection has been performed in order to inspect the number of broken wire ropes in use. However, in the visual inspection, there is a problem that it takes work time when a long wire rope is inspected. For this reason, there has been proposed an apparatus for quantitatively measuring the number of breaks of a wire rope by a flaw detection apparatus (wire rope tester) using an electromagnetic flaw detection method. However, the result of diagnosis with this wire rope tester is only output as a waveform on paper, and the wire rope strands are determined by visual judgment of the height of the waveform and the position where the waveform output is continuously high. I caught the part where the cut occurred.

Therefore, in recent years, it has a detection unit that detects abnormalities such as breakage of the wire rope and a signal processing unit that processes signals obtained from this detection unit. A rope abnormality detection device that outputs a detection signal is proposed (for example, see Patent Document 1).
JP 2002-362847 A

  The prior art disclosed in Patent Document 1 includes a detection unit that detects the state of the wire rope and a detection unit that detects the position of the elevator, and uses the nearest floor as a guide for the position where the wire breakage occurred as a display unit. The elevator can be operated to a position where it can be displayed and the abnormal part of the wire rope can be confirmed, thereby improving work efficiency.

  However, the prior art disclosed in Patent Document 1 determines that the damage of the wire rope is abnormal only by the size of the output waveform of the wire rope tester. In such a determination, whether the damage is minor or severe. It cannot be distinguished whether it is damage. Therefore, if it is detected that there are multiple damages in the wire rope, the elevator wire rope must be moved to all of those damage points and the damage state must be confirmed. There is a problem that it takes a long time to grasp a place where there is intense. In this prior art, when the behavior of the wire rope is observed and it is determined that visual inspection is necessary, the corresponding position of the wire rope at that time cannot be stored.

  The present invention has been made from the above-described prior art, and its purpose is to easily grasp whether the damage of the wire rope is minor or severe. The object is to provide a strand break diagnosis system.

  In order to achieve this object, an elevator wire rope strand breakage diagnosis system according to the present invention includes a strand break detection unit that detects a strand break of a wire rope formed by twisting a plurality of steel wires, A display unit for displaying a diagnosis result of wire breakage of the wire rope according to the data detected by the wire breakage detection unit, and the wire breakage detected by the strand breakage detection unit every certain interval Based on the level calculated from the correlation between the output and the number of outputs exceeding the threshold value, the wire rope breakage state is displayed on the display unit in stages.

  Moreover, the wire rope breakage diagnosis system for elevators according to the present invention is characterized in that, in the invention, the measurement waveform is color-coded according to the rank of the diagnosis and displayed on the display unit.

  The wire rope strand breakage diagnosis system for an elevator according to the present invention is the display according to the invention, in which the portion where the strand breakage occurs with respect to the measured waveform is associated with the elapsed time from the start of measurement. It is characterized by being displayed on the screen.

  In the elevator wire rope strand breakage diagnosis system according to the present invention, the elevator wire rope breakage diagnosis system according to the present invention is displayed on the display unit by overlapping the elevator floor at the position where the strand breakage occurs with respect to the measured waveform. It is characterized by the fact that it was made to let you.

  Moreover, the wire rope strand breakage diagnosis system for elevators according to the present invention is such that, in the above invention, the display unit displays the list in order of the number of portions that exceed the strand break threshold within a unit time. It is characterized by.

  Moreover, the wire rope strand breakage diagnosis system according to the present invention is a list in which the occurrence position of the wire rope strand breakage in the invention is shown as indicating the position from both the measurement start and the measurement end. It is characterized in that it is displayed on the display unit.

  Moreover, the wire rope strand breakage diagnosis system for an elevator according to the present invention is characterized in that, in the present invention, a timer is displayed on the display unit.

  The wire rope breakage diagnosis system for an elevator according to the present invention is the above-described invention, wherein the wire rope diagnosis data measured in the field is collected in one place by the communication network, and the data corresponding to the field from the customer information is collected. And the diagnostic contents are displayed on the display unit.

  The present invention is based on the level calculated from the correlation between the wire breakage output detected by the strand breakage detection unit and the number of outputs exceeding the threshold value at certain intervals, and the wire rope strand breakage state. Since it is displayed on the display unit in stages, it can be easily grasped whether the damage of the wire rope is minor or severe, compared to the conventional wire rope This makes it possible to accurately and efficiently determine the service life. Thereby, while the optimization of the maintenance period of a wire rope can be implement | achieved, the replacement plan of a wire rope can be set appropriately.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out an elevator wire rope breakage diagnosis system according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a configuration diagram showing an embodiment of an elevator wire rope strand breakage diagnosis system according to the present invention.

  As shown in FIG. 1, the elevator is connected to an elevator car 1, a wire rope 2 that is an object to be diagnosed in the present embodiment, one end of which is connected to the elevator car 1, and the other end of the wire rope 2. A counterweight 3 that balances the weight of the elevator car 1, a hoisting machine 4 that winds up the wire rope 2 to drive the elevator car 2, and a control panel 5 that controls the hoisting machine 4 are provided. . In general, a plurality of wire ropes 2 are provided according to the weight and application of the elevator car 1.

  6 is a strand break detection unit that detects the strand break of the wire rope 2. For example, when diagnosing the wire rope 2, the strand break detection unit 6 disposed in the machine room is brought into contact with the wire rope 2 through magnetic flux. Thus, by running the elevator car 1 in this state, the broken wire is detected based on the magnitude of the magnetic flux density of the broken wire on the surface of the wire rope 2. Data measured by the strand break detection unit 6 is taken into the data processing unit 8 via the A / D conversion unit 7.

  The wire rope strand breakage diagnosis system according to the present embodiment processes the measurement data by the strand breakage detection unit 6 described above, the A / D conversion unit 7 that captures data measured by the strand breakage detection unit 6, and the measurement data. In addition to the measurement data processing unit 8 for diagnosing strand breakage, the wire breakage output detected by the strand breakage detection unit 6 for every certain interval and the correlation between the number of outputs exceeding the threshold value are calculated. Based on the level, it includes a display unit 9 that displays the state of the wire rope 2 being broken in stages. The measurement data processing unit 8 has a floor data storage unit 8A that arbitrarily stores a floor position when the elevator car 1 is traveling, and can arbitrarily store a position that an operator wants to store during measurement. ing. The display unit 9 has a timer processing unit 9A. This timer processing unit 9A is used when it is desired to move the elevator car 1 to a desired position after diagnosis.

  2, 3, and 4 show the wire breakage diagnosis result according to the present embodiment, FIG. 2 shows a case where there is no strand occurrence place, FIG. 3 shows a case where there is a strand occurrence place, FIG. 4 is a diagram showing a case where there is a floor display.

  In FIG. 2, 11 indicates the operation start time of the elevator car 1, 12 indicates the stop time of the elevator car 1, and the measurement by the strand break detection unit 6 is performed from the operation start time 11 to the stop time 12. It shows that.

  When a wire break occurs in the wire rope 2, the leakage density detected by the wire break detection unit 6 increases, and a waveform with a large output is detected so as to form a protruding portion in FIG.

  Moreover, the waveform of FIG. 3 has shown the output according to the leakage magnetic flux which the strand break detection part 6 detected, for example, in order of 15b part, 14b part, and 13b part, it shows that damage by strand break is severe. Show. Further, 13, 14 and 15 in FIG. 3 indicate the degree of the strand break diagnosis result, and the operator can start the inspection from the severe, that is, the strand break diagnosed as the diagnosis result 15.

  Also, it is convenient to display the 13c part, 14c part, and 15c part shown in FIG. In FIG. 3, reference numeral 16 denotes a timer display unit displayed by the processing operation of the timer processing unit 9A.

  2 and 3, it is possible to display the floor on which the elevator car 1 passes as shown in FIG. 4 instead of the elapsed time on the horizontal axis.

  FIG. 5 is a diagram showing strand breakage determination data for diagnosing strand breakage in the present embodiment.

  FIG. 5 shows a level for diagnosing the stage of wire breakage of the wire rope 2 in the data processing unit 8 and an output measured by the strand breakage detection unit 6. The wire breakage determination data converted in consideration of the output size and output variation within a certain section is shown. The vertical axis shows the output detected by the strand break detector 6 and the level for determining the value calculated from the number of correlations exceeding a preset threshold, and the horizontal axis shows the elapsed time. In FIG. 5, 18 is a minor wire breakage (A determination), 19 is a medium wire breakage (B determination), and 20 is a range in which the wire breakage is severe (C determination). Yes.

  The measurement data detected by the strand break detection unit 6 is taken into the data processing unit 8 via the A / D conversion unit 7, and the data processing unit 8 outputs measurement data every predetermined time and is set in advance. The determination data shown in FIG. 5 is calculated from the number of correlations exceeding the threshold, and the degree of wire breakage is diagnosed based on the range of each determination. In the diagnosis determination shown in FIG. 5, 13 (A determination) in FIG. 3 is performed when the wire breakage is minor, and 14 (B determination) in FIG. 3 is diagnosed when the diagnosis is moderate. In such a case, it is displayed on the screen of the display unit 9 as 15 (C determination) in FIG.

  6 and 7 are diagrams showing the results of the wire breakage diagnosis in this embodiment in a table.

  21 is the number of the wire rope 2 diagnosed as having a broken wire, 22 is a wire rope 2 wire break diagnosis, and the broken wire from the operation start time 11 of the elevator car 1 has occurred. Elapsed time to the position where the machine is located, 23 is the time until the wire breakage from the stop point 12 of the elevator car 1, 24 is the value of the detected leakage magnetic flux, and 25 is the threshold shown in FIG. The number of times of detection exceeding 26 continuously indicates a determination result by diagnosis.

  FIG. 6 shows the display section 9 in the order of the wire ropes 2 that are judged to have poor determination results 26, that is, severe damage due to broken wires. In addition, by changing the processing operation, it is possible to display the wire ropes 2 that are diagnosed to be lightly damaged by the strand breakage. FIG. 7 shows the locations where the wire rope 2 is broken on the display unit 9 in ascending order of the elevator car 1 from the operation start time 11. This can also be displayed in descending order of the elevator car 1 by changing the processing operation.

  FIG. 8 is a flowchart of strand breakage diagnosis performed in this embodiment.

  The elevator car 1 is run as shown in step S1, and the measurement of data is started by the strand break detection unit 6 as shown in step S2. The measurement data is sequentially taken into the data processing unit 8 via the A / D conversion unit 7 shown in FIG. As shown in step S3, when the elevator car 1 stops, the measurement data acquisition ends.

  Subsequently, as shown in step S <b> 4, when the worker starts data processing for diagnosis, the data processing unit 8 processes measurement data for each sampling period set in the A / D conversion unit 7. First, as shown in step S5, the sum of the outputs is calculated for the measurement data for a certain fixed time from the operation start time 11. Subsequently, as shown in step S6, the number exceeding the threshold value within the same fixed time is counted. The threshold value shown here indicates X in the waveform showing the temporal change of the leakage magnetic flux in FIG. 3, and it is assumed that the leakage magnetic flux is disturbed, that is, the wire rope 2 is broken. It is a reference value to be deceived.

  Thereafter, as shown in step S7, a process of correlating the output calculated in step S5 with the count exceeding the threshold calculated in step S6 is performed. The calculation method in this process is a process that takes into account the output magnitude and output variation in a certain interval, and shows a large value when output is continuously generated. Subsequently, as shown in step S8, it is determined whether or not the correlation value calculated in step S7 exceeds the determination values A, B, and C shown in FIG. 5, and if so, stored in step S9. If not, the process proceeds to step S10 as it is. If there is unprocessed data, the process returns to step S5 with reference to the next measurement data as shown in step S11. As shown in step S10, while confirming that all the measurement data from the start of measurement to the end of measurement is diagnosed, the wire rope 2 is broken by the wire breakage determination data shown in FIG. Determined.

  In the process of step S8 described above, it is determined in which range each of the calculated determination data is 18 (A determination), 19 (B determination), or 20 (C determination) in FIG. 3 is displayed on the display unit 9 based on the wire breakage determination data shown in FIG. 5 processed in step S8. For example, in FIG. 5, when the degree of strand breakage is 18 (A determination), the portion 13b in FIG. 3 corresponds to the portion 13d in FIG. 3, the degree of wire breakage 13 (A determination) is displayed. At this time, the portion shown in part 13a of FIG. 3 exceeds the threshold value X where the wire breakage is considered to occur, but from the correlation between the output processed in step S7 and the count number exceeding the threshold value, In FIG. 5, it is not determined that the degree of wire breakage is 18 (A determination). Similarly to the case of slight A determination, the determination B in the middle of strand breakage B and the severe determination C are processed in step S7, respectively, and the portion 14b in FIG. 3b corresponds to the 15d portion (C determination) in FIG. 5, and the 14a portion and the 15a portion in FIG. 3 have large output waveform levels but are not continuously detected. If the level is replaced with the level shown in FIG. 5, the levels determined as B determination and C determination are not reached. For example, the part 14a is determined as A and the part 15a is determined as B.

  The wire breakage diagnosis results 13, 14, 15 of the wire rope 2 processed in this way are displayed on the display unit 9 so as to overlap the measured waveform as shown in FIG. 3, or as shown in FIGS. Can be displayed on the display unit 9 as a list. Moreover, when confirming the location where the wire rope 2 is broken, the elevator car 1 is used with the elapsed time from the operation start time 11 shown in FIG. After moving, the wire rope 2 is inspected. In addition, as shown in FIG. 4, by switching the display of the display unit 9 to the floor display 17, the wire breakage occurrence point is inspected while moving the elevator car 1 with reference to the corresponding floor. Can do.

  Further, the timer function processed by the timer processing unit 9A of the display unit 9 is displayed as a timer display 16 in FIG. 3, and the operator can move to the elevator car 1 to the wire break occurrence location determined from the strand break diagnosis result. When the timer display unit 16 is activated when moving the vehicle, the time 22 from the operation start time 11 of the elevator car 1 to the point where the wire breakage displayed in the tables shown in FIGS. The time 23 from the stop point 12 of the elevator car 1 is counted down. With this function, the elevator car 1 can be easily moved to the location where the wire breakage occurs, that is, the wire rope 2 can be moved easily. Since the timer processing unit 9A can be operated regardless of the newly installed or existing elevator, it is possible to diagnose the wire breakage of the wire rope 2 related to the old model elevator that cannot obtain the position information of the elevator 1. Is also effective.

  The operator can determine the period until the next inspection is carried out in accordance with the stages of such determination results A, B, and C, and can determine the standard of the time until the wire rope 2 is replaced.

  Note that the processing in this embodiment may be performed after the measurement data is transmitted to the centrally managed server 10 using a general public line. In this case, since the measurement data is accumulated in the server 10, it is possible to prevent the capacity from being exceeded. Moreover, since the data of each site can be centrally managed in a lump, it is possible to easily grasp the tendency of the wire ropes 2 of all target elevator wire ropes 2 to break.

  According to the elevator wire rope strand breakage diagnosis system according to the present embodiment configured as described above, it is possible to easily grasp whether the damage state of the strand breakage of the wire rope 2 is minor or severe. It is possible to preferentially confirm a severely damaged part, and to determine the life of the wire rope 2 accurately and efficiently. Thereby, while the optimization of the maintenance period of a wire rope can be implement | achieved, the replacement plan of a wire rope can be set appropriately.

It is a lineblock diagram showing one embodiment of a wire rope strand breakage diagnostic system concerning an elevator concerning the present invention. It is the figure which showed the strand break diagnosis result (there is no strand generation location) which concerns on this embodiment. It is the figure which showed the strand break diagnosis result (with a strand generation location) based on this embodiment. It is the figure which showed the strand break diagnosis result (with floor display) concerning this embodiment. It is a figure which shows the data for a wire break determination for diagnosing the wire break in this embodiment. It is the figure which showed the strand break diagnosis result in this embodiment with the table | surface. It is the figure which showed the strand break diagnosis result in this embodiment with the table | surface. It is a flowchart of the strand break diagnosis implemented in this embodiment.

Explanation of symbols

2 Wire rope 6 Wire break detection unit 7 A / D conversion unit 8 Data processing unit 8A Floor data storage unit 9 Display unit 9A Timer processing unit 10 Server 11 Operation start time 12 Stop time 13 Diagnosis result (A determination)
14 Diagnosis result (B judgment)
15 Diagnosis result (C judgment)
16 Timer display unit 17 Floor display 18 Range indicating A determination 19 Range indicating B determination 20 Range indicating C determination 26 Determination result

Claims (8)

  A strand break detection unit for detecting a strand break of a wire rope formed by twisting a plurality of steel wires, and a diagnosis result of the strand break of the wire rope according to data detected by the strand break detection unit The wire rope based on the level calculated from the correlation between the wire breakage output detected by the wire breakage detection unit for each certain section and the number of outputs exceeding the threshold value. A wire rope strand breakage diagnosis system for an elevator, characterized in that the state of strand breakage is displayed on the display unit in stages. In the elevator wire rope strand breakage diagnosis system according to claim 1,
A wire rope strand breakage diagnosis system for an elevator, characterized in that a measurement waveform is color-coded according to a diagnosis rank and displayed on the display unit. In the elevator wire rope strand breakage diagnosis system according to claim 1,
A wire rope strand breakage diagnosis system for an elevator characterized in that a portion where a strand breakage occurs with respect to a measured waveform and an elapsed time from the start of measurement are associated with each other and displayed on the display unit. . In the elevator wire rope strand breakage diagnosis system according to claim 1,
An elevator wire rope strand breakage diagnosis system characterized in that an elevator floor is overlapped and displayed on the display unit at a position where a strand breakage occurs with respect to a measured waveform. In the elevator wire rope strand breakage diagnosis system according to claim 1,
An elevator wire rope strand breakage diagnosis system characterized in that a list is displayed in order from the largest number of locations that exceed the strand break threshold within a unit time. In the elevator wire rope strand breakage diagnosis system according to claim 1,
The wire rope strands of an elevator characterized in that the occurrence location of the wire rope strand breaks is displayed on the display unit in a list so as to indicate the positions from both the measurement start and measurement end Cutting diagnosis system. In the elevator wire rope strand breakage diagnosis system according to any one of claims 1 to 6,
An elevator wire rope strand breakage diagnosis system characterized in that a timer is displayed on the display unit. In the elevator wire rope strand breakage diagnosis system according to any one of claims 1 to 6,
The diagnostic data of the wire rope measured at the site is collected in one place by the communication network, the corresponding data of the site is searched from the customer information, and the diagnostic content is displayed on the display unit. Elevator wire rope breakage diagnostic system.

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