JP6958580B2 - Elevator rope diagnostic system and diagnostic method - Google Patents

Description

The present invention relates to a diagnostic system and a diagnostic method for elevator ropes.

Conventionally, for example, an elevator rope diagnostic system has a magnetic flux detection unit that detects a leakage magnetic flux from a magnetized elevator rope, and a time axis and a leakage magnetic flux axis based on the leakage magnetic flux detected by the magnetic flux detection unit. It is provided with a magnetic flux calculation unit that calculates a magnetic flux (for example, Patent Document 1). When the rope is broken, magnetic flux leaks from the broken portion, so the presence or absence of the broken rope is determined based on the magnitude of the leaked magnetic flux.

By the way, not only the magnetic flux leaks from the rope due to the disconnection of the rope, but also the magnetic flux leaks from the rope due to other factors. In this way, the magnetic flux detector detects not only the magnetic flux to be detected (for example, the magnetic flux leaking from the rope, the magnetic flux passing through the inside of the rope, etc.) but also the magnetic flux due to other factors, so that they are disturbed (for example, the magnetic flux leaking from the rope, the magnetic flux passing through the inside of the rope, etc.). Since it appears as noise), it may not be possible to properly determine whether or not the rope is broken.

JP-A-2009-249117

Therefore, an object of the present invention is to provide a diagnostic system and a diagnostic method for an elevator rope that can remove a magnetic flux that becomes a disturbance in order to determine whether or not the rope is broken.

The elevator rope diagnostic system is a waveform that calculates a waveform consisting of a rope distance axis and a magnetic flux axis based on a magnetic flux detection unit that detects the magnetic flux of the magnetized elevator rope and the magnetic flux detected by the magnetic flux detection unit. It includes a calculation unit and a noise removal calculation unit that calculates a correction waveform obtained by removing noise from the waveform calculated by the waveform calculation unit.

Further, in the elevator rope diagnostic system, the magnetic flux detection unit detects the leakage magnetic flux from the elevator rope, and the noise removal calculation unit is a Fourier class based on the waveform calculated by the waveform calculation unit. A function calculation unit that calculates a function by expansion, a component removal unit that removes a component of a predetermined cycle from a function calculated by the function calculation unit, and a component removal unit that removes a component of the predetermined cycle. It may be configured to include a correction waveform calculation unit that calculates a waveform based on a later function.

Further, the elevator rope diagnosis system may be configured to include a disconnection determination unit for determining the presence or absence of disconnection of the rope based on the correction waveform calculated by the noise removal calculation unit.

Further, the rope diagnostic system for an elevator includes a rope information input unit for inputting information on the rope to be diagnosed, and the component removing unit has the function based on the information input to the rope information input unit. On the other hand, the configuration may be such that the component having the predetermined period is removed.

Further, in an elevator rope diagnostic system, the rope is provided with a convex portion that becomes convex outward in the radial direction by providing a plurality of strands to be twisted, and the component removing portion is provided with respect to the function. Therefore, the component having a period equal to or longer than the dimension of the convex portion in the rope length direction may be removed.

Further, in a diagnostic system for an elevator rope, the rope includes a plurality of strands to be twisted, the strands include a plurality of outer strands constituting an outer layer, and the component removing unit performs the function. Therefore, the component having a period smaller than the outer diameter of the outer wire may be removed.

Further, in an elevator rope diagnostic system, the magnetic flux detecting unit includes a magnetic portion arranged so as to cover a predetermined portion of the rope and a magnetic flux passing through the magnetic portion in order to collect the leakage magnetic flux from the rope. The component removing unit may be configured to include a measuring unit for measuring and removing a component having a period larger than the dimension of the predetermined portion in the rope length direction with respect to the function.

Further, in the method of diagnosing the rope for an elevator, the magnetic flux detecting unit for detecting the magnetic flux detects the magnetic flux of the rope by shifting in the rope length direction with respect to the magnetized rope for the elevator. It includes calculating a waveform including a rope distance axis and a magnetic flux axis based on a magnetic flux, and calculating a correction waveform obtained by removing noise from the calculated waveform.

Further, in the method of diagnosing an elevator rope, detecting the magnetic flux from the rope includes detecting the leakage magnetic flux from the rope, and calculating a correction waveform obtained by removing noise from the calculated waveform. Is to calculate a function by Fourier series expansion based on the calculated waveform, to remove a component of a predetermined period from the calculated function, and after the component of the predetermined period is removed. It may be a method of calculating a waveform based on a function and including.

FIG. 1 is a schematic view showing a state in which the elevator rope diagnostic system according to the embodiment diagnoses the rope. FIG. 2 is a control block diagram of the elevator. FIG. 3 is a perspective view of the diagnostic tool according to the embodiment of FIG. FIG. 4 is a vertical cross-sectional view of the magnetic flux detection unit according to the same embodiment. FIG. 5 is a perspective view of a main part of the magnetic flux detection unit according to the same embodiment. FIG. 6 is a vertical cross-sectional view of a main part of the magnetic flux detection unit according to the same embodiment. FIG. 7 is a control block diagram of the diagnostic system according to the embodiment. FIG. 8 is a main part view of the elevator rope. FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG. FIG. 10 is a control flow diagram of the diagnostic system. FIG. 11 is a diagram showing the relationship between time and magnetic flux. FIG. 12 is a diagram showing the relationship between time and the amount of displacement of the magnetic flux detection unit with respect to the rope. FIG. 13 is a diagram showing the relationship between the rope distance and the magnetic flux. FIG. 14 is a diagram showing the relationship between the corrected rope distance and the magnetic flux. FIG. 15 is a control block diagram of the diagnostic system according to another embodiment.

Hereinafter, an embodiment of the elevator rope diagnostic system and diagnostic method will be described with reference to FIGS. 1 to 14. In each drawing, the dimensional ratio of the drawings and the actual dimensional ratio do not always match, and the dimensional ratios between the drawings do not necessarily match.

As shown in FIG. 1, the diagnostic system (hereinafter, also simply referred to as “diagnostic system”) 1 for the elevator rope 11 according to the present embodiment is used for diagnosing the presence or absence of disconnection of the rope 11. Here, the configuration of the elevator 10 will be described prior to explaining each configuration of the diagnostic system 1.

As shown in FIGS. 1 and 2, the elevator 10 includes a car 10a for a user to ride on and a counterweight 10b connected to the car 10a by a rope 11. Further, the elevator 10 includes a hoisting machine 10d having a sheave 10c around which the rope 11 is wound, and an elevator control unit 12 for controlling each part such as the hoisting machine 10d.

The elevator 10 according to the present embodiment has a configuration in which the hoisting machine 10d is arranged inside the machine room X1, but is not limited to such a configuration. For example, the elevator 10 may be configured such that the hoisting machine 10d is arranged inside the hoistway X2.

The elevator 10 includes a movement information input unit 10e in which information on the movement of the car 10a is input to a user or a worker. Further, the elevator 10 includes a car position detection unit 10f that detects that the car 10a is located at each landing X3, and a car movement amount detection unit 10g that detects the movement amount of the car 10a.

The movement information input unit 10e is, for example, an operation button operated by the user (an operation button arranged inside the car 10a, an operation button arranged in each landing X3), or a manual operation unit operated by an operator. be. The manual operation unit can be set by inputting the moving speed, moving direction, and moving distance of the car 10a.

The configuration of the car position detection unit 10f is not particularly limited, but for example, the car position detection unit 10f may be various sensors (for example, photoelectric sensor, proximity sensor, etc.) arranged at each landing X3. The configuration of the car movement amount detection unit 10g is not particularly limited, but for example, the car movement amount detection unit 10g may be various sensors (for example, an encoder) that detect the rotation amount of the sheave 10c.

The elevator control unit 12 includes an acquisition unit 12a for acquiring each information and a storage unit 12b for storing various information. Further, the elevator control unit 12 includes a car position calculation unit 12c that calculates the position of the car 10a, and a hoisting control unit 12d that controls the operation of the hoisting machine 10d.

The car position calculation unit 12c calculates the position of the car 10a based on the information detected by the car position detection unit 10f and the car movement amount detection unit 10g. For example, the car position calculation unit 12c can calculate the movement amount of the car 10a and the movement speed of the car 10a based on the position of the car 10a.

The diagnostic system 1 includes a diagnostic tool 2 for diagnosing the rope 11. The position where the diagnostic tool 2 is arranged is not particularly limited. For example, in FIG. 1, the diagnostic tool 2 is arranged inside the machine room X1. Further, the diagnostic tool 2 may be fixed to, for example, the machine room X1 (for example, the floor), or may be held by an operator, for example.

As shown in FIG. 3, the diagnostic tool 2 includes a magnetic flux detection unit 3 that detects the magnetic flux of the rope 11, a displacement detection unit 4 that detects the amount of displacement of the magnetic flux detection unit 3 with respect to the rope 11, and the magnetic flux detection unit 3 and displacement. It is provided with a diagnostic tool main body 2a for connecting the detection unit 4. In the present embodiment, the magnetic flux detection unit 3 and the displacement detection unit 4 are fixed to each other, but for example, the magnetic flux detection unit 3 and the displacement detection unit 4 are separated from each other. It may be configured as.

The displacement detection unit 4 includes a rotation unit 4a whose outer circumference is in contact with the rope 11, a rotation detection unit 4b that detects the amount of rotation of the rotation unit 4a, and a rotation unit 4a and a diagnostic tool main body so that the rotation unit 4a can rotate. It is provided with a connecting portion 4c for connecting to 2a. The configuration of the rotation detection unit 4b is not particularly limited, but for example, the rotation detection unit 4b may be various sensors (for example, an encoder) that detect the rotation amount of the rotation unit 4a.

The outer peripheral portion of the rotating portion 4a is formed in a concave shape for hooking and positioning the rope 11. The connecting portion 4c is displaceably connected to the diagnostic tool main body 2a, and the displacement detecting portion 4 includes an elastic portion 4d that applies a rotating portion 4a toward the rope 11. Therefore, the elastic portion 4d is elastically deformed, so that the rotating portion 4a is in contact with the rope 11 under pressure.

The configuration of the displacement detection unit 4 is not particularly limited as long as it can detect the amount of displacement of the magnetic flux detection unit 3 with respect to the rope 11. For example, the rotation unit 4a, the rotation detection unit 4b, the connection unit 4c, and the elastic unit 4d may have different configurations from the configuration according to the present embodiment, or may not be provided.

The magnetic flux detection unit 3 includes a detection unit main body 3a for detecting the magnetic flux of the rope 11 and a connection unit 3b for connecting the detection unit main body 3a and the diagnostic tool main body 2a. The connection portion 3b is displaceably connected to the diagnostic tool main body 2a, and the magnetic flux detection unit 3 includes an elastic portion 3c that applies the detection unit main body 3a toward the rope 11. Therefore, the elastic portion 3c is elastically deformed, so that the detection portion main body 3a is in contact with the rope 11 under pressure.

By the way, the diagnosis using magnetic flux includes, for example, a leakage magnetic flux method and a total magnetic flux method. In this embodiment, the leakage magnetic flux method is adopted, and the magnetic flux detection unit 3 has a configuration of detecting, for example, the magnetic flux leaking from the rope 11. The total magnetic flux method may be adopted, and the magnetic flux detecting unit 3 may detect, for example, the magnetic flux passing through the inside of the rope 11, or both may be adopted, and the magnetic flux detecting unit 3 may, for example, both of them. It may be configured to detect the magnetic flux of.

The leakage magnetic flux method detects the magnetic flux leaking from the magnetized rope 11 and diagnoses the deterioration of the rope 11. For example, when the surface of the rope 11 has irregularities due to the disconnection of the wire, the magnetic flux leaks from the irregularities. Therefore, the rope 11 is diagnosed by detecting the leakage magnetic flux (for example, finding the disconnection). )can do.

On the other hand, the total magnetic flux method detects the magnetic flux passing through the inside of the magnetized rope 11 and diagnoses the deterioration of the rope 11. For example, when the effective cross-sectional area (cross-sectional area through which magnetic flux can pass) changes due to partial thinning of the rope 11, corrosion, wear, etc., the magnetic flux passing through the inside of the portion is reduced. Therefore, the rope 11 can be diagnosed (for example, finding thinning, corrosion, wear, and disconnection) by detecting the magnetic flux.

As shown in FIG. 4, the detection unit main body 3a cooperates with the permanent magnets 3d and 3d for magnetizing the rope 11 and the permanent magnets 3d and 3d and the rope 11 to form a magnetic circuit (shown by the solid line arrow in FIG. 4). For the purpose of construction, a yoke 3e for connecting the permanent magnets 3d and 3d is provided. The material of the yoke 3e is not particularly limited, but the yoke 3e has a high magnetic permeability and may be formed of, for example, pure iron or low carbon steel.

The detection unit main body 3a includes a measurement unit 3f for measuring the leakage magnetic flux from the rope 11 and a magnetic unit 3g arranged so as to cover a predetermined portion of the rope 11 in order to collect the leakage magnetic flux from the rope 11. There is. The magnetic portion 3g has magnetism, and the measuring unit 3f measures the magnetic flux passing through the magnetic portion 3g. The configuration of the measuring unit 3f is not particularly limited, but for example, the measuring unit 3f may be a detection coil that converts the magnitude of the magnetic flux into the magnitude of the voltage (current).

Further, the detection unit main body 3a is provided with a guide unit 3h at the tip thereof to guide the rope 11. The guide portion 3h is formed in a concave shape for hooking and positioning the rope 11. The guide portion 3h is composed of a magnetic portion 3g and a non-magnetic portion 3i. The magnetic portion 3g and the non-magnetic portion 3i are connected to each other.

The material of the magnetic portion 3g is not particularly limited, but the magnetic portion 3g has a high magnetic permeability and may be formed of, for example, pure iron or low carbon steel. The material of the non-magnetic portion 3i is not particularly limited, but the non-magnetic portion 3i has a low magnetic permeability and may be formed of, for example, a hard resin.

For example, the magnetic permeability of the magnetic portion 3g is preferably 100 times or more, and more preferably 1000 times or more, the magnetic permeability of the non-magnetic portion 3i. Further, for example, the magnetic permeability of the magnetic portion 3g is preferably 100 times or more, more preferably 1000 times or more, the magnetic permeability of the atmosphere.

The configuration of the magnetic flux detection unit 3 is not particularly limited as long as it can detect the magnetic flux of the magnetized rope 11. For example, the detection unit 3a, the connection unit 3b, the elastic unit 3c, the permanent magnet 3d, the yoke 3e, the measurement unit 3f, the magnetic unit 3g, the guide unit 3h, and the non-magnetic unit 3i are different from the configuration according to the present embodiment. It may or may not be provided.

As shown in FIGS. 5 and 6, the magnetic portion 3g includes end portions 3j and 3j and a connecting portion 3k that connects the end portions 3j and 3j. The tip of the end portion 3j is formed in a concave shape to form the guide portion 3h, and the connecting portion 3k is connected to the base end of the end portion 3j and extends along the rope 11 (guide portion 3h). There is.

As a result, the magnetic portion 3g is arranged so as to cover a part (hereinafter, referred to as “magnetic coating portion”) 11a of the rope 11. The magnetic flux leaked from the magnetically coated portion 11a of the rope 11 is collected by the magnetic portion 3g, and the measuring portion 3f measures the magnetic flux passing through the connecting portion 3k. Therefore, the leakage magnetic flux from the magnetically coated portion 11a of the rope 11 can be reliably detected.

As shown in FIG. 7, the diagnostic system 1 includes a rope information input unit 1a into which information on the rope 11 is input, and a diagnostic information input unit 1b in which information for diagnosis is input. Further, the diagnostic system 1 includes a processing unit 5 for processing information and an output unit 1c for outputting the information processed by the processing unit 5.

For example, information on the rope 11 being diagnosed (for example, the outer diameter of the rope 11) is input to the rope information input unit 1a. For example, information related to the diagnosis (for example, an instruction to start the diagnosis, an instruction to end the diagnosis, etc.) is input to the diagnosis information input unit 1b. The configuration of the input units 1a and 1b is not particularly limited, but for example, the input units 1a and 1b may be a mouse, a keyboard, and various switches. Further, the output unit 1c may be, for example, a device for displaying information (for example, a monitor), or may be, for example, a device for outputting a signal to the outside.

The processing unit 5 includes an acquisition unit 5a that acquires information from each unit 1a, 1b, 3, and 4, and a storage unit 5b that stores various types of information. Further, the processing unit 5 includes a waveform calculation unit 5c that calculates a waveform including a rope distance axis and a magnetic flux axis based on the magnetic flux detected by the magnetic flux detection unit 3 and the displacement amount detected by the displacement detection unit 4, and the waveform. A noise removal calculation unit 5h that calculates a correction waveform that removes noise from the waveform calculated by the calculation unit 5c, and a disconnection determination unit that determines the presence or absence of disconnection of the rope 11 based on the correction waveform calculated by the noise removal calculation unit 5h. It has 5g.

The noise removing unit 5h performs a function calculation unit 5d that calculates a function by Fourier series expansion based on the waveform calculated by the waveform calculation unit 5c, and a component having a predetermined period with respect to the function calculated by the function calculation unit 5d. It is provided with a component removing unit 5e to be removed. Further, the noise removing unit 5h includes a correction waveform calculation unit 5f that calculates a correction waveform based on a correction function after the component removing unit 5e removes a component having a predetermined period.

ここで、ｆ（ｘ）は、磁束であり、ｘは、ロープ距離であり、Ｌは、ロープ１１の全計測距離、即ち、磁束が計測されたロープ１１の範囲の全長である。また、Ｌ／ｎは、周期であり、周期がＬ／ｎの成分とは、Ａ_ｎｃｏｓ（ｎ・２π／Ｌ）ｘ及びＢ_ｎｓｉｎ（ｎ・２π／Ｌ）ｘである。 The function calculation unit 5d calculates the waveform calculated by the waveform calculation unit 5c into the following function expanded by the Fourier series.

Here, f (x) is the magnetic flux, x is the rope distance, and L is the total measured distance of the rope 11, that is, the total length of the range of the rope 11 in which the magnetic flux is measured. Further, L / n is a period, and the components having a period of L / n are _An cos (n · 2π / L) x and B _n sin (n · 2π / L) x.

The component removing unit 5e removes a component having a period that causes disturbance (noise) with respect to the function calculated by the function calculation unit 5d. Specifically, the component removing unit 5e removes a component having a cycle larger than a predetermined cycle and a component having a cycle smaller than the predetermined cycle for the function.

The correction waveform calculation unit 5f calculates the correction waveform based on the correction function from which the component of the period that becomes the disturbance is removed, and the disconnection determination unit 5g determines the presence or absence of the disconnection of the rope 11 based on the correction waveform. do. As a result, it is possible to properly determine whether or not the rope 11 is broken.

Here, an example of a component of a period that causes disturbance in the leakage magnetic flux method will be described. First, returning to FIG. 6, the disturbance that can be specified from the structure of the magnetic flux detection unit 3 will be described.

The magnetic flux leaks from the rope 11, but the larger the unevenness on the surface of the rope 11, the larger the magnitude of the magnetic flux leaking from the rope 11. Then, as shown in FIG. 6, when the rope 11 has a broken portion 11b, the surface of the rope 11 has large irregularities, so that the magnitude of the magnetic flux leaking from the broken portion 11b of the rope 11 is large. ,growing.

Further, the period of the leakage magnetic flux detected by the magnetic flux detection unit 3 is substantially the same as the length of the unevenness on the surface of the rope 11 (dimension in the rope length direction D4). That is, the period of the leakage magnetic flux due to the broken wire portion 11b of the rope 11 is substantially the same as the length of the broken wire portion 11b (dimension in the rope length direction D4) W1.

By the way, the magnetic portion 3g collects the leakage magnetic flux from the magnetic coating portion 11a of the rope 11, and the measuring unit 3f measures the magnetic flux passing through the magnetic portion 3g. On the other hand, since the magnetic flux leaked from the rope 11 other than the magnetically coated portion 11a leaks to the atmosphere, the measuring unit 3f can hardly measure it.

As a result, the magnetic flux detection unit 3 cannot detect the leakage magnetic flux of the component having a period larger than the length (dimension of the rope length direction D4) W2 of the magnetic coating portion 11a (magnetic part 3g). Therefore, a component having a period larger than the length W2 of the magnetically coated portion 11a is likely to be a disturbance. Therefore, it is preferable that the component having a period larger than the length W2 of the magnetically coated portion 11a is removed from the Fourier series-expanded function.

Next, the first disturbance that can be identified from the structure of the rope 11 to be diagnosed in the leakage magnetic flux method will be described.

As shown in FIGS. 8 and 9, the rope 11 includes a core material 11c arranged at the center and a plurality of strands 13 arranged around the core material 11c and twisted together. The strands 13 are a plurality of strands 13a, 13b, specifically, a plurality of inner strands 13a arranged inside, and a plurality of strands 13 arranged and twisted around the inner strands 13a to form an outer layer. It is provided with an external wire 13b.

The number of strands 13, inner wires 13a and outer wires 13b is not particularly limited. The material of the core material 11c is not particularly limited, but for example, the core material 11c may be formed of a fiber or a synthetic resin. The material of the inner wire 13a and the outer wire 13b is not particularly limited, but may be made of, for example, steel.

By the way, since the plurality of strands 13 are twisted together, the rope 11 is provided with a convex portion 11d which is convex outward in the radial direction. Since the convex portion 11d constitutes the unevenness of the surface of the rope 11, the magnetic flux having a period substantially the same as the length of the convex portion 11d (dimension in the rope length direction D4) W3 is caused by the convex portion 11d. It leaks from the rope 11.

Moreover, for example, even if the entire exposed portion of the outer wire 13b (for example, the portion shown by the hatching in the center of FIG. 8) is broken and missing, the length of the broken portion 11b (Dimension in the rope length direction D4) is smaller than the length W3 of the convex portion 11d. For example, when the disconnection portion 11b extends in parallel with the rope length direction D4, the length of the disconnection portion 11b becomes the maximum and is substantially the same as the length W3 of the convex portion 11d.

As a result, the component having a period of the convex portion 11d having a length W3 or more is likely to be a disturbance. Therefore, it is preferable that the component having a period of the convex portion 11d having a length W3 or more is removed from the Fourier series expanded function.

In the present embodiment, the length W2 of the magnetically coated portion 11a (magnetic portion 3g) is larger than the length W3 of the convex portion 11d. The length W2 of the magnetically coated portion 11a (magnetic portion 3g) may be smaller than the length W3 of the convex portion 11d.

Next, the second disturbance that can be identified from the structure of the rope 11 to be diagnosed in the leakage magnetic flux method will be described.

Since the plurality of outer strands 13b are twisted together with a large force, when the outer strands 13b are cut, the tip portion 13c of the outer strands 13b is pushed outward. As a result, the tip portion 13c of the outer wire 13b rides on the outside of the adjacent outer wire 13b or projects outward in the radial direction. Then, since the tip portion 13c of the outer wire 13b constitutes the unevenness of the surface of the rope 11, the magnetic flux having a period substantially the same as the length of the tip portion 13c (dimension in the rope length direction D4) W4 is generated at the tip portion 13c. Leaks from the rope 11 due to the above.

By the way, the length W4 of the tip portion 13c of the cut outer wire 13b is equal to or larger than the outer diameter of the outer wire 13b. For example, when the tip portion 13c protrudes in parallel with the radial direction of the rope 11, the length W4 of the tip portion 13c is the minimum, and is substantially the same as the outer diameter of the outer wire 13b.

As a result, the component having a period smaller than the outer diameter of the outer wire 13b is likely to be a disturbance. Therefore, it is preferable that the component having a period smaller than the outer diameter of the outer wire 13b is removed from the Fourier series expanded function.

The configuration of the diagnostic system 1 according to the present embodiment is as described above. Next, the diagnostic method according to the present embodiment will be described with reference mainly to FIGS. 10 to 14 (also FIGS. 1 to 9). reference).

First, the information of the rope 11 is input to the rope information input unit 1a (rope information input step S1). For example, when the storage unit 5b stores the dimension W3 of the convex portion 11d corresponding to the outer diameter of the rope 11 and the outer diameter of the outer wire 13b, the outside of the rope 11 is stored in the rope information input unit 1a. The diameter is entered.

Then, since the car 10a is moved from the state where the magnetic flux detecting unit 3 and the displacement detecting unit 4 are in contact with the rope 11 (car moving step S2), the magnetic flux detecting unit 3 is displaced with respect to the rope 11. At this time, the magnetic flux detection unit 3 detects the magnetic flux of the magnetized rope 11 (magnetic flux detection step S3), and the displacement detection unit 4 detects the amount of displacement of the magnetic flux detection unit 3 with respect to the rope 11 (the magnetic flux detection unit 3). Displacement detection step S4).

As shown in FIG. 11, the magnetic flux detected by the magnetic flux detection unit 3 can be represented by a waveform including a time axis and a magnetic flux axis, and the displacement amount detected by the displacement detection unit 4 is shown in FIG. As shown, it can be represented by a waveform including a time axis and a displacement amount axis of the magnetic flux detecting unit 3 with respect to the rope 11.

By the way, as shown in FIG. 12, since the waveform including the time axis and the displacement amount axis of the magnetic flux detecting unit 3 with respect to the rope 11 is not a straight line, the moving speed of the car 10a is not the same from the start to the end of the diagnosis. It's changing. Therefore, based on the magnetic flux detected by the magnetic flux detection unit 3 and the displacement amount detected by the displacement detection unit 4, the waveform calculation unit 5c calculates a waveform including a rope distance axis and a magnetic flux axis, as shown in FIG. (Waveform calculation step S5).

At this time, the position of the car 10a at the start of the diagnosis and the distance between the landings X3 can be input to the diagnosis information input unit 1b, so that the position of the car 10a can be output on the rope distance axis. .. The rope distance axis is the distance of the rope 11 in the rope length direction D4, and indicates the distance from the position (diagnosis start position) detected by the magnetic flux detection unit 3 at the start of diagnosis.

Then, based on the waveform calculated by the waveform calculation unit 5c, the function calculation unit 5d calculates a function by Fourier series expansion as follows (function calculation step S6).

After that, the component removing unit 5e removes a component having a period that causes disturbance with respect to the function expanded by the Fourier series (component removing step S7). At this time, since the function expanded by the Fourier series is a function related to the rope distance axis, the disturbance caused by the length can be removed.

For example, a component having a period larger than the length W2 of the magnetically coated portion 11a of the rope 11, a component having a period having a length W3 or more of the convex portion 11d of the rope 11, and a period having a period smaller than the outer diameter of the outer wire 13b. The components are removed from the Fourier series expanded function. The length W2 of the magnetically coated portion 11a may be input by the diagnostic information input unit 1b or may be stored in the storage unit 5b of the processing unit 5.

Here, an example of the component removing step S7 will be described below.

First, as the first disturbance component removal, a component having a period larger than the length W2 of the magnetically coated portion 11a of the rope 11 is removed. For example, it is assumed that the total measurement distance L of the rope 11 is 20 m (= 20 × 10 ³ mm), and the length W2 of the magnetically coated portion 11a of the rope 11 is 10 mm. ^{As a result, a component having a period larger than 10 mm (= 20 × 10 3} mm / 2,000), which is the length W2 of the magnetically coated portion 11a of the rope 11, that is, a component having a period of n <2,000 is removed. ..

Next, as a component removal of the second disturbance, a component having a period of the length W3 or more of the convex portion 11d of the rope 11 is removed. For example, it is assumed that the rope diameter of the rope 11 to be diagnosed is 10 mm, and the length W3 of the convex portion 11d of the rope 11 is 67.5 mm. ^{As a result, the component having a period of 67.5 mm (≈20 × 10 3} mm / 296.2) or more, which is the length W3 of the convex portion 11d of the rope 11, that is, the component having a period of n ≦ 296.2 is removed. ..

Further, as the removal of the component of the third disturbance, the component having a period smaller than the outer diameter of the outer wire 13b is removed. For example, it is assumed that the rope diameter of the rope 11 to be diagnosed is 10 mm and the outer diameter of the outer wire 13b is 0.66 mm. As a result, a component having a period smaller than the outer diameter of the outer wire 13b of ^{0.66 mm (≈20 × 10 3} mm / 30,303.03), that is, a component having a period of n> 30,303.03 can be obtained. Remove.

このように、外乱となる周期の成分が除去される。 As a result, the component having a period of n <2,000, the component having a period of n≤296.2, and the component having a period of n> 30,303.03 are removed. The components of the periodic band of 2,000 ≦ n ≦ 30,303 remain. Since A ₀ is considered to be a component having a period of n = 0, A ₀ is removed.

In this way, the components of the period that become the disturbance are removed.

Then, based on the correction function after the component of the period that becomes the disturbance is removed, the correction waveform calculation unit 5f calculates the correction waveform as shown in FIG. 14 (correction waveform calculation step S8). Since the function calculation step S6, the component removal step S7, and the correction waveform calculation step S8 calculate the correction waveform obtained by removing noise from the waveform calculated in the waveform calculation step S5, the steps S6 to S8 are performed. As a whole, it is referred to as noise removal calculation step S10.

After that, the disconnection determination unit 5g determines whether or not the rope 11 is disconnected based on the correction waveform (disconnection determination step S9). For example, the disconnection determination unit 5g determines that the rope 11 is disconnected at a position where the magnitude of the magnetic flux exceeds the threshold value (broken line in FIG. 14). The threshold value may be input by the diagnostic information input unit 1b or may be stored in the storage unit 5b of the processing unit 5.

In this way, since the presence or absence of the disconnection of the rope 11 is determined based on the correction waveform after removing the magnetic flux that becomes the disturbance, the presence or absence of the disconnection of the rope 11 can be appropriately determined. Further, since one axis of the waveform is the rope distance axis, the work of specifying an arbitrary position of the waveform indicating the magnetic flux, for example, a position where the rope 11 is determined to be broken (a rope 11 disconnection determination position). Becomes easier.

For example, as shown in FIG. 14, the disconnection determination position of the rope 11 is separated from the position of the rope 11 detected by the magnetic flux detection unit 3 when the car 10a is located on the second floor by a predetermined distance W5. The position. Therefore, for example, when the car 10a is positioned at the landing X3 on the second floor and then raised by a predetermined distance W5, the position of the rope 11 (or its peripheral position) detected by the magnetic flux detection unit 3 is confirmed. Then, the disconnection position of the rope 11 can be confirmed.

The method of diagnosing the rope 11 is not limited to such a method. For example, the order of the rope information input step S1 is not particularly limited as long as it is before the component removing step S7. Further, the waveforms according to FIGS. 11 to 14 may or may not be displayed by the output unit 1c, and for example, the diagnostic information input unit 1b may display the waveforms of FIGS. 11 to 14. Hidden may be selectable.

Based on the above, in the method for diagnosing the elevator rope 11 according to the present embodiment, the magnetic flux detecting unit 3 for detecting the magnetic flux is displaced in the rope length direction D4 with respect to the magnetized elevator rope 11. Detecting the magnetic flux of 11 (S3), calculating the waveform consisting of the rope distance axis and the magnetic flux axis based on the detected magnetic flux (S5), and calculating the correction waveform obtained by removing noise from the calculated waveform. To do (S10) and.

Further, the diagnostic system 1 for the elevator rope 11 according to the present embodiment has a magnetic flux detection unit 3 that detects the magnetic flux of the magnetized elevator rope 11 and a rope distance based on the magnetic flux detected by the magnetic flux detection unit 3. It includes a waveform calculation unit 5c that calculates a waveform including a shaft and a magnetic flux axis, and a noise removal calculation unit 5h that calculates a correction waveform obtained by removing noise from the waveform calculated by the waveform calculation unit 5c.

According to such a diagnostic method and the diagnostic system 1, a waveform including a rope distance axis and a magnetic flux axis is calculated based on the detected magnetic flux. After that, since the correction waveform obtained by removing noise from the waveform is calculated, it is possible to remove the magnetic flux that becomes a disturbance in order to determine whether or not the rope 11 is broken.

Further, in the method of diagnosing the elevator rope 11 according to the present embodiment, detecting the magnetic flux of the rope 11 (S3) includes detecting the leakage magnetic flux from the rope 11, and from the calculated waveform. To calculate the correction waveform with noise removed (S10), to calculate the function by Fourier series expansion based on the calculated waveform (S6), and to remove the component of a predetermined period from the calculated function. (S7) and calculating the waveform based on the function after the component of the predetermined period is removed (S8).

Further, in the diagnostic system 1 of the elevator rope 11 according to the present embodiment, the magnetic flux detection unit 3 detects the leakage magnetic flux from the elevator rope 11, and the noise removal calculation unit 5h is the magnetic flux detection unit 3. A function calculation unit 5c that calculates a waveform consisting of a rope distance axis and a magnetic flux axis based on the magnetic flux detected by, and a function calculation that calculates a function by Fourier series expansion based on the waveform calculated by the waveform calculation unit 5c. For the function calculated by the function calculation unit 5d and the function calculation unit 5d, the component removal unit 5e that removes the component of the predetermined period and the function after the component removal unit 5e removes the component of the predetermined period are used. Based on this, it is configured to include a correction waveform calculation unit 5f for calculating a waveform.

According to such a diagnostic method and the diagnostic system 1, a waveform composed of a rope distance axis and a magnetic flux axis is calculated based on the detected magnetic flux, and then a function by Fourier series expansion is calculated based on the waveform. .. Then, for the function, the component of a predetermined period is removed, and the waveform is calculated based on the function after the removal. As a result, it is possible to remove the magnetic flux that becomes a disturbance in order to determine whether or not the rope 11 is broken.

Further, the diagnostic system 1 of the elevator rope 11 according to the present embodiment is provided with a disconnection determination unit 5g for determining the presence or absence of disconnection of the rope 11 based on the correction waveform calculated by the noise removal calculation unit 5h. It is a configuration.

According to such a configuration, the presence or absence of disconnection of the rope 11 is determined based on the corrected waveform. Thereby, the presence or absence of disconnection of the rope 11 can be determined based on the waveform after removing the magnetic flux that becomes a disturbance.

Further, the diagnostic system 1 of the elevator rope 11 according to the present embodiment includes a rope information input unit 1a into which the information of the rope 11 to be diagnosed is input, and the component removing unit 5e is the rope information input unit 1a. Based on the information input to, the component of the predetermined period is removed from the function.

According to such a configuration, the component of the predetermined period is removed based on the input information of the rope 11. Thereby, the magnetic flux which becomes a disturbance due to the structure of the rope 11 can be removed.

Further, in the diagnostic system 1 of the elevator rope 11 according to the present embodiment, the rope 11 is provided with a convex portion 11d which is convex outward in the radial direction by including a plurality of strands 13 to be twisted. The component removing unit 5e has a configuration in which, with respect to the function, a component having a period of the convex portion 11d having a dimension W3 or more in the rope length direction D4 is removed.

According to such a configuration, leakage magnetic flux is generated due to the unevenness of the convex portion 11d of the rope 11, and a defect (disconnection portion) larger than the dimension W3 of the convex portion 11d in the rope length direction D4 is generated. In contrast to the low possibility, the component having a period having a dimension W3 or more in the rope length direction D4 of the convex portion 11d is removed. As a result, the magnetic flux that becomes a disturbance can be removed.

Further, in the diagnostic system 1 of the elevator rope 11 according to the present embodiment, the rope 11 includes a plurality of strands 13 to be twisted, and the strand 13 includes a plurality of outer strands 13b constituting an outer layer. The component removing unit 5e has a configuration in which, for the function, a component having a period smaller than the outer diameter of the outer wire 13b is removed.

According to such a configuration, when the cut outer wire 13b protrudes outward in the radial direction of the rope 11, the dimension W4 of the protruding portion in the rope length direction D4 is outside the outer wire 13b. It will be larger than the diameter. As a result, the component having a period smaller than the outer diameter of the outer wire 13b is likely to be a disturbance. On the other hand, components having a period smaller than the outer diameter of the outer wire 13b are removed. As a result, the magnetic flux that becomes a disturbance can be removed.

Further, in the diagnostic system 1 of the elevator rope 11 according to the present embodiment, the magnetic flux detection unit 3 is arranged so as to cover a predetermined portion 11a of the rope 11 in order to collect the leakage magnetic flux from the rope 11. A magnetic portion 3g and a measuring unit 3f for measuring the magnetic flux passing through the magnetic portion 3g are provided, and the component removing unit 5e has a dimension W2 of the predetermined portion 11a in the rope length direction D4 with respect to the function. The configuration is to remove components with a period larger than that.

According to such a configuration, since the leakage magnetic flux from the predetermined portion 11a of the rope 11 is collected, the leakage magnetic flux from the predetermined portion 11a of the rope 11 can be reliably detected. On the other hand, the component having a period larger than the dimension W2 in the rope length direction D4 of the predetermined portion 11a of the rope 11 is likely to be a disturbance, and the component having the period is removed. As a result, the magnetic flux that becomes a disturbance can be removed.

Further, the diagnostic system 1 of the elevator rope 11 according to the present embodiment includes a displacement detection unit 4 that detects the displacement amount of the magnetic flux detection unit 3 with respect to the rope 11, and the waveform calculation unit 5c is the magnetic flux detection unit 3. Based on the magnetic flux detected by and the displacement amount detected by the displacement detection unit 4, the waveform including the rope distance axis and the magnetic flux axis is calculated.

According to such a configuration, the amount of displacement of the magnetic flux detecting unit 3 with respect to the rope 11 is detected. Then, a waveform including a rope distance axis and a magnetic flux axis is calculated based on the detected magnetic flux and the detected displacement amount. As a result, since one axis of the waveform is the rope distance axis, the work of specifying the position of the rope 11 corresponding to an arbitrary position of the waveform indicating the magnetic flux becomes easy.

The diagnostic system 1 and the diagnostic method of the elevator rope 11 are not limited to the configuration of the above-described embodiment, and are not limited to the above-mentioned action and effect. In addition, it goes without saying that the diagnostic system 1 and the diagnostic method of the elevator rope 11 can be variously modified without departing from the gist of the present invention. For example, it goes without saying that one or a plurality of configurations and methods according to the following various modification examples may be arbitrarily selected and adopted for the configurations and methods according to the above-described embodiment.

(1) In the diagnostic system 1 and the diagnostic method according to the above embodiment, the waveform calculation unit 5c has a rope distance axis based on the magnetic flux detected by the magnetic flux detection unit 3 and the displacement amount detected by the displacement detection unit 4. The configuration is such that a waveform consisting of a magnetic flux axis is calculated. However, the diagnostic system 1 and the diagnostic method are not limited to such a configuration.

For example, by keeping the displacement speed of the magnetic flux detecting unit 3 with respect to the rope 11 constant, the amount of displacement of the magnetic flux detecting unit 3 with respect to the rope 11 can be calculated by the displacement speed and the time. As a result, by making the displacement speed of the magnetic flux detection unit 3 with respect to the rope 11 constant, the waveform calculation unit 5c is based on the displacement speed of the magnetic flux detection unit 3 with respect to the rope 11 and the magnetic flux detected by the magnetic flux detection unit 3. The configuration may be such that the waveform including the rope distance axis and the magnetic flux axis is calculated.

(2) Further, in the diagnostic system 1 and the diagnostic method according to the above embodiment, the displacement detection unit 4 includes a rotation unit 4a whose outer circumference is in contact with the rope 11 and a rotation detection unit 4b that detects the amount of rotation of the rotation unit 4a. It is a configuration that is equipped with. However, the diagnostic system 1 and the diagnostic method are not limited to such a configuration.

For example, as shown in FIG. 15, the displacement detection unit may be configured to include a car movement amount detection unit of 10 g. That is, the displacement detection unit may be configured to detect the displacement amount of the magnetic flux detection unit 3 with respect to the rope 11 by detecting the movement amount of the car 10a. The processing unit 5 according to FIG. 15 acquires the information detected by the car movement amount detection unit 10g by the acquisition unit 5a via the elevator control unit 12.

Further, the processing unit 5 acquires the information detected by the car position detection unit 10f by the acquisition unit 5a. According to such a configuration, even if the position of the car 10a at the start of diagnosis and the distance between each landing X3 are unknown or input, the rope distance in the waveform consisting of the rope distance axis and the magnetic flux axis On the axis, the position of the rope 11 detected by the magnetic flux detecting unit 3 when located at each landing X3 of the car 10a can be displayed.

(3) Further, in the diagnosis system 1 and the diagnosis method according to the above embodiment, the disconnection determination unit 5g determines whether or not the rope 11 is disconnected based on the correction waveform calculated by the correction waveform calculation unit 5f. Is. However, the diagnostic system 1 and the diagnostic method are not limited to such a configuration. For example, the operator may determine whether or not the rope 11 is broken based on the correction waveform calculated by the correction waveform calculation unit 5f. That is, the worker may determine whether or not the rope 11 is broken by looking at the waveform displayed on the output unit 1c.

(4) Further, in the diagnostic system 1 and the diagnostic method according to the above embodiment, the component removing portion 5e has a component having a period larger than the length W2 of the magnetic coating portion 11a (magnetic portion 3g) and a convex of the rope 11. The configuration is such that the component having a period having a length W3 or more of the portion 11d and the component having a period smaller than the outer diameter of the outer wire 13b are removed. However, the diagnostic system 1 and the diagnostic method are not limited to such a configuration.

For example, the component removing unit 5e may be configured to remove components having a period larger or smaller than the other dimensions of the rope 11. Further, the component removing unit 5e may be configured to remove components having a period other than the set period band. Such a period zone may be set by deriving a component of a period that causes disturbance based on the results of a plurality of experiments.

(5) Further, in the diagnostic system 1 and the diagnostic method according to the above embodiment, the magnetic flux detection unit 3 is configured to include a magnetic unit 3g. However, the diagnostic system 1 and the diagnostic method are not limited to such a configuration. For example, the magnetic flux detection unit 3 may be configured not to include the magnetic unit 3g.

(6) Further, in the diagnostic method according to the above embodiment, the diagnostic tool 2 is fixed, and the magnetic flux detection unit 3 is displaced with respect to the rope 11 by moving the car 10a. However, the diagnostic method is not limited to such a configuration. For example, the magnetic flux detection unit 3 may be displaced with respect to the rope 11 by grasping the diagnostic tool 2 and moving it with respect to the rope 11 while the car 10a is stopped.

(7) Further, in the diagnostic system 1 and the diagnostic method according to the above embodiment, the noise removal calculation unit 5h calculates a function by expanding the waveform by Fourier series expansion, removes components having a predetermined period, and then obtains a correction waveform. It is a configuration that calculates. However, the diagnostic system 1 and the diagnostic method are not limited to such a configuration. That is, the noise removal calculation unit 5h is not particularly limited as long as it has a configuration capable of removing noise.

For example, even if the magnetic flux method is adopted and the magnetic flux detection unit 3 detects the magnetic flux passing through the inside of the magnetized rope 11, the noise removal calculation unit 5h calculates a function of the waveform by Fourier series expansion. , The correction waveform may be calculated after removing the components having a predetermined period, and is not particularly limited. For example, when the magnetic flux detection unit 3 always detects a constant amount of magnetic flux due to the surrounding environment, the noise removal calculation unit 5h may be configured to remove the constant amount of magnetic flux as noise.

1 ... Diagnostic system, 1a ... Rope information input unit, 1b ... Diagnostic information input unit, 1c ... Output unit, 2 ... Diagnostic tool, 2a ... Diagnostic tool body, 3 ... Magnetic flux detection unit, 3a ... Detection unit body, 3b ... Connection Part, 3c ... Elastic part, 3d ... Permanent magnet, 3e ... York, 3f ... Measuring part, 3g ... Magnetic part, 3h ... Guide part, 3i ... Non-magnetic part, 3j ... End part, 3k ... Connecting part, 4 ... Displacement Detection unit, 4a ... Rotation unit, 4b ... Rotation detection unit, 4c ... Connection unit, 4d ... Elastic unit, 5 ... Processing unit, 5a ... Acquisition unit, 5b ... Storage unit, 5c ... Waveform calculation unit, 5d ... Function calculation unit 5, 5e ... component removal unit, 5f ... correction waveform calculation unit, 5g ... disconnection determination unit, 5h ... noise removal calculation unit, 10 ... elevator, 10a ... basket, 10b ... balance weight, 10c ... sheave, 10d ... hoisting Machine, 10e ... Movement information input unit, 10f ... Car position detection unit, 10g ... Car movement amount detection unit, 11 ... Rope, 11a ... Magnetic coating part, 11b ... Disconnection part, 11c ... Core material, 11d ... Convex part, 12 ... Elevator control unit, 12a ... Acquisition unit, 12b ... Storage unit, 12c ... Car position calculation unit, 12d ... Winding control unit, 13 ... Strand, 13a ... Inner wire, 13b ... Outer wire, 13c ... Tip X1 ... Machine room, X2 ... Hoistway, X3 ... Landing

Claims (9)

A magnetic flux detector that detects the magnetic flux of a magnetized elevator rope,
A waveform calculation unit that calculates a waveform including a rope distance axis and a magnetic flux axis of the elevator rope based on the magnetic flux detected by the magnetic flux detection unit.
An elevator rope diagnostic system including a noise removal calculation unit that calculates a correction waveform obtained by removing noise from a waveform calculated by the waveform calculation unit. The magnetic flux detection unit detects the leakage magnetic flux from the elevator rope and determines the magnetic flux leakage.
The noise removal calculation unit
A function calculation unit that calculates a function by Fourier series expansion based on the waveform calculated by the waveform calculation unit, and a function calculation unit.
A component removal unit that removes components with a predetermined period from the function calculated by the function calculation unit, and a component removal unit.
The diagnostic system for an elevator rope according to claim 1, further comprising a correction waveform calculation unit that calculates a waveform based on a function after the component removal unit removes a component having a predetermined period. The diagnostic system for an elevator rope according to claim 1 or 2, further comprising a disconnection determination unit for determining the presence or absence of disconnection of the elevator rope based on a correction waveform calculated by the noise removal calculation unit. A rope information input unit for inputting information on the elevator rope to be diagnosed is provided.
The diagnostic system for an elevator rope according to claim 2, wherein the component removing unit removes a component having the predetermined period with respect to the function based on the information input to the rope information input unit. The elevator rope is provided with a plurality of strands to be twisted so as to have a convex portion that is convex outward in the radial direction.
The diagnostic system for an elevator rope according to claim 4, wherein the component removing unit removes components having a period equal to or larger than the dimension of the convex portion in the rope length direction of the elevator rope. .. The elevator rope comprises a plurality of strands to be twisted together.
The strand includes a plurality of outer wires constituting the outer layer, and comprises a plurality of outer wires.
The diagnostic system for an elevator rope according to claim 4 or 5, wherein the component removing unit removes a component having a period smaller than the outer diameter of the outer wire with respect to the function. The magnetic flux detecting unit, to collect the leakage magnetic flux from the elevator rope, the magnetic portion is disposed so as to cover a predetermined portion of the rope for the elevator, and a measuring unit for measuring the magnetic flux passing through the magnetic portion, Equipped with
The diagnostic system for an elevator rope according to claim 2, wherein the component removing unit removes a component having a period larger than the dimension in the rope length direction of the elevator rope in the predetermined portion with respect to the function. The magnetic flux detection unit for detecting the magnetic flux detects the magnetic flux of the elevator rope by shifting the magnetized elevator rope in the rope length direction of the elevator rope.
Based on the detected magnetic flux, the waveform including the rope distance axis and the magnetic flux axis of the elevator rope can be calculated.
A method for diagnosing elevator ropes, including calculating a corrected waveform from which noise has been removed from the calculated waveform. Detecting the magnetic flux of the rope for the elevator includes detecting a leakage magnetic flux from the elevator rope,
To calculate the correction waveform by removing noise from the calculated waveform
To calculate a function by Fourier series expansion based on the calculated waveform,
For the calculated function, removing the components of a predetermined period and
The method for diagnosing an elevator rope according to claim 8, wherein the waveform is calculated based on the function after the component of the predetermined period is removed.

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