WO2018142613A1 - 検出装置 - Google Patents
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- WO2018142613A1 WO2018142613A1 PCT/JP2017/004225 JP2017004225W WO2018142613A1 WO 2018142613 A1 WO2018142613 A1 WO 2018142613A1 JP 2017004225 W JP2017004225 W JP 2017004225W WO 2018142613 A1 WO2018142613 A1 WO 2018142613A1
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- phase
- calculated
- surface data
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/32—Counting, measuring, recording or registering devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
- D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2301/00—Controls
- D07B2301/55—Sensors
- D07B2301/5531—Sensors using electric means or elements
- D07B2301/5572—Sensors using electric means or elements optical
Definitions
- the present invention relates to a detection device that uses a long body as a detection target.
- Patent Document 1 describes an apparatus for inspecting a rope.
- the device described in Patent Document 1 includes a light source and a light receiving element.
- a rope is disposed between the light source and the light receiving element.
- the diameter of the rope is calculated based on the amount of light received by the light receiving element.
- the position of the rope is calculated by making the calculated peak value interval of the diameter coincide with the strand interval.
- An object of the present invention is to provide a detection device capable of detecting an abnormality of a long body even when the moving speed of the long body varies.
- the detection apparatus includes a data acquisition unit that acquires first surface data and second surface data of a long body having a periodic pattern on a surface, and a memory that stores first reference data and second reference data.
- Similarity calculation means for calculating the second similarity between the second surface data and the first reference data acquired by the second reference data and the fourth similarity between the second surface data and the second reference data acquired by the data acquisition means;
- the declination of the first similarity vector having the first similarity and the second similarity calculated by the similarity calculation means as the first phase is used as the first phase.
- phase calculation means for calculating the second phase of the second similarity vector having the third similarity and the fourth similarity calculated as the second phase, and a phase calculation means.
- a period calculating unit that calculates a period of the pattern formed on the long body, and a first unit that detects an abnormality in the long body based on the period calculated by the period calculating unit. 1 abnormality detection means.
- the detection apparatus includes a data acquisition unit that acquires a plurality of surface data of a long body having a periodic pattern on a surface, a storage unit that stores first reference data and second reference data, and data acquisition Selecting means for selecting the first surface data and the second surface data from the surface data acquired by the means; the first similarity between the first surface data selected by the selecting means and the first reference data; The second similarity between the selected first surface data and the second reference data, the second similarity between the second surface data and the first reference data selected by the selection means, and the second surface data selected by the selection means Similarity calculation means for calculating the fourth similarity of the second reference data and the first similarity calculated by the similarity calculation means The second similarity vector having the third similarity and the fourth similarity calculated by the similarity calculating means as a first phase, and the first similarity vector having the second similarity as an element is calculated as the first phase.
- a phase calculation unit that calculates a declination angle of the second pattern as a second phase, and a cycle calculation unit that calculates a cycle of a pattern formed on the elongated body based on the first phase and the second phase calculated by the phase calculation unit;
- first abnormality detecting means for detecting an abnormality of the elongated body based on the period calculated by the period calculating means.
- the detection device has a first surface data of a first long body having a periodic pattern on the surface and a second long surface having the same pattern as the pattern formed on the surface of the first long body.
- Data acquisition means for acquiring the second surface data of the body, storage means for storing the first reference data and the second reference data, and the first similarity between the first surface data and the first reference data acquired by the data acquisition means.
- Similarity calculation means for calculating the fourth similarity between the second surface data and the second reference data acquired by the first data calculated by the similarity calculation means.
- the first similarity vector having the similarity and the second similarity as elements is calculated as the first phase, and the second similarity having the third similarity and the fourth similarity calculated by the similarity calculation means as elements.
- the phase calculation means for calculating the deviation angle of the similarity vector as the second phase, and the first phase and the second phase calculated by the phase calculation means there is an abnormality in the first elongated body or the second elongated body.
- First abnormality detecting means for detecting the occurrence.
- the detection apparatus includes, for example, similarity calculation means, phase calculation means, period calculation means, and first abnormality detection means.
- the phase calculation means calculates the declination of the first similarity vector as the first phase, and calculates the declination of the second similarity vector as the second phase.
- the period calculating means calculates the period of the pattern formed on the long body based on the first phase and the second phase calculated by the phase calculating means.
- the first abnormality detection means detects the abnormality of the long body based on the period calculated by the period calculation means. With the detection device according to the present invention, even when the moving speed of the long body varies, the abnormality of the long body can be detected.
- FIG. 1 It is a figure which shows the example of the detection apparatus in Embodiment 1 of this invention. It is the figure which looked at the elongate body from the direction of the arrow A shown in FIG. It is a figure which shows the processing method of the light reception image acquired by the light receiving element. It is a figure which shows the example of a control apparatus. It is a figure for demonstrating the function of a data processing part. It is a figure which shows the example of reference data. It is a figure for demonstrating the function of a phase calculation part. It is a flowchart which shows the operation example of the detection apparatus in Embodiment 1 of this invention. It is a figure for demonstrating the other example of a sensor head.
- FIG. 1 is a diagram showing an example of a detection apparatus according to Embodiment 1 of the present invention.
- the detection device is a device for detecting an abnormality in the long body.
- the long body includes, for example, the rope 1.
- FIG. 2 is a view of the elongated body viewed from the direction of arrow A shown in FIG.
- the x-axis, y-axis and z-axis are set as shown in FIGS.
- the y-axis is an axis that faces the longitudinal direction of the long body.
- the x axis is orthogonal to the y axis and the z axis.
- the z axis is orthogonal to the y axis and the x axis.
- the x-axis, y-axis, and z-axis are axes set to represent coordinates in a three-dimensional space.
- FIG. 2 corresponds to a view of a long body viewed from the + z direction.
- the long body moves in the longitudinal direction.
- the rope 1 moves in the + y direction or the ⁇ y direction.
- An example of the rope 1 that moves in this way is a wire rope used in an elevator.
- the rope 1 may move in both the + y direction and the ⁇ y direction. Note that the long body to be detected by the detection device is not limited to the rope 1.
- the rope 1 includes a plurality of strands.
- the rope 1 is formed by twisting a plurality of strands. For this reason, the rope 1 has a periodic pattern on the surface.
- the object for which the detection apparatus detects an abnormality is a long body having a periodic pattern on the surface.
- the “pattern” includes, for example, a shape, a figure, a color, and a color shade.
- 1 and 2 show an example in which a rope 1 is formed by twisting eight strands.
- irregularities formed by a plurality of strands being twisted together are regularly arranged.
- the ideal cross-sectional shape of the rope 1 is the same for each distance obtained by dividing the twist pitch by the number of strands.
- the cross section is a cross section in a direction orthogonal to the longitudinal direction of the rope 1. The distance obtained by dividing the winding pitch by the number of strands is the strand pitch, that is, the period of the pattern.
- the detection device calculates the period of the pattern formed on the long body and determines whether there is an abnormality.
- the detection device includes a sensor head 2 and a control device 3, for example.
- the sensor head 2 is an example of means for acquiring surface data of a long body.
- “Surface data” is data relating to the pattern of the surface of the elongated body.
- the sensor head 2 simultaneously acquires surface data at two locations on the long body.
- the sensor head 2 acquires data representing the unevenness formed on the surface of the portion of the rope 1 that passes through the first position as the first surface data.
- the sensor head 2 acquires data representing the irregularities formed on the surface of the portion of the rope 1 that passes through the second position as the second surface data.
- the second position is a position different from the first position.
- the second position is a position away from the first position by a certain distance in the y-axis direction.
- FIG. 1 shows an example in which the sensor head 2 is an optical profile measuring instrument.
- the sensor head 2 includes, for example, a light source 4, a light source 5, a light receiving element 6, and a light receiving element 7.
- the light source 4 irradiates the surface of the rope 1 with light.
- 1 and 2 show an example in which the light source 4 emits laser light in a direction orthogonal to the longitudinal direction of the rope 1.
- the light emitted from the light source 4 strikes the surface of the portion of the rope 1 that passes through the first position. In the example shown in FIGS. 1 and 2, the light emitted from the light source 4 strikes a straight line from one end of the rope 1 to the other end so as to cross the rope 1.
- the light source 5 irradiates the surface of the rope 1 with light.
- the light source 5 emits light parallel to the light emitted from the light source 4.
- the timing at which the light source 5 emits light is the same as the timing at which the light source 4 emits light.
- 1 and 2 show an example in which the light source 5 emits laser light in a direction orthogonal to the longitudinal direction of the rope 1.
- the light emitted from the light source 5 strikes the surface of the portion of the rope 1 that passes through the second position. That is, the light emitted from the light source 5 strikes the rope 1 at a position away from the position where the light from the light source 4 strikes the rope 1 by a certain distance in the y-axis direction. In the example shown in FIGS. 1 and 2, the light emitted from the light source 5 strikes a straight line from one end of the rope 1 to the other end so as to cross the rope 1.
- the light receiving element 6 receives light reflected from the surface of the rope 1 among the light emitted from the light source 4.
- the light receiving element 6 is disposed obliquely with respect to the direction in which the light source 4 emits light.
- the light receiving element 6 receives light reflected obliquely at a certain angle with respect to the longitudinal direction of the rope 1 out of light from the light source 4 reflected on the surface of the rope 1.
- the light receiving element 7 receives the light reflected from the surface of the rope 1 among the light irradiated from the light source 5.
- the light receiving element 7 is disposed obliquely with respect to the direction in which the light source 5 emits light.
- the light receiving element 7 receives light reflected obliquely at a certain angle with respect to the longitudinal direction of the rope 1 out of light from the light source 5 reflected on the surface of the rope 1.
- the light receiving element 7 receives light reflected at the same angle as the light received by the light receiving element 6 on the surface of the rope 1.
- the light a shown in FIGS. 1 and 2 is light emitted from the light source 4 toward the rope 1.
- the light b and the light c are light reflected at an angle received by the light receiving element 6 among the light a reflected from the surface of the rope 1.
- the light b is light reflected at the outermost portion of the strand.
- the light c is light reflected by a groove formed by adjacent strands.
- the light d shown in FIGS. 1 and 2 is the light irradiated on the rope 1 from the light source 5.
- the light e and the light f are light reflected at an angle received by the light receiving element 7 among the light d reflected on the surface of the rope 1.
- the light e is light reflected at the outermost portion of the strand.
- the light f is light reflected by a groove formed by adjacent strands.
- FIG. 3 is a diagram illustrating a method of processing a received light image acquired by the light receiving element 6 and the light receiving element 7.
- the upper part of FIG. 3 shows a light reception image of the light receiving element 6 and a light reception image of the light receiving element 7.
- the lower part of FIG. 3 shows the first surface data P1 converted from the received light image of the light receiving element 6 and the second surface data P2 converted from the received light image of the light receiving element 7.
- 3 indicates that the first surface data P1 and the second surface data P2 each include a plurality of data in the x direction. The number of data included in the surface data is arbitrarily determined.
- the control device 3 detects a pitch abnormality occurring in the rope 1 based on the first surface data and the second surface data acquired by the sensor head 2. That is, the control device 3 detects a cycle abnormality of the pattern formed on the surface of the long body.
- FIG. 1 shows an example in which the control device 3 is connected to the sensor head 2 by a signal line 8. You may arrange
- the sensor head 2 may include some of the functions of the control device 3.
- FIG. 4 is a diagram illustrating an example of the control device 3.
- the control device 3 includes, for example, a storage unit 9, a data processing unit 10, a similarity calculation unit 11, a phase calculation unit 12, a cycle calculation unit 13, and an abnormality detection unit 14.
- Two pieces of reference data are stored in the storage unit 9.
- one reference data stored in the storage unit 9 is referred to as first reference data.
- the other reference data stored in the storage unit 9 is referred to as second reference data.
- the data processing unit 10 processes the first surface data received from the sensor head 2 and outputs the processed data as final first surface data.
- the data processing unit 10 processes the second surface data received from the sensor head 2 and outputs the processed data as final second surface data.
- the data processing unit 10 constitutes a part of means for acquiring the surface data of the long body. In detecting the pitch abnormality of the rope 1, it is desirable to employ data obtained by removing a specific frequency component from the surface data acquired by the sensor head 2 as final surface data. By performing such data processing, it is possible to emphasize the periodic pattern component of the rope 1 on the surface.
- FIG. 5 is a diagram for explaining the function of the data processing unit 10.
- FIG. 5 shows the first surface data P1 and the second surface data P2 after the data processing by the data processing unit 10 is performed.
- the data processing unit 10 obtains the first surface data P1 shown in FIG. 5 by performing a low-frequency component removal process on the first surface data P1 shown in FIG.
- the data processing unit 10 obtains the second surface data P2 illustrated in FIG. 5 by performing a low-frequency component removal process on the second surface data P2 illustrated in FIG.
- the influence of the diameter of the rope 1 is removed from the first surface data P1 and the second surface data P2 shown in FIG.
- the function of the data processing unit 10 may be provided in the sensor head 2. Further, the means for acquiring the surface data of the long body may not have the function of the data processing unit 10. In the example shown in the present embodiment, the output from the data processing unit 10 is the final output from the means for acquiring the surface data of the long body. If the data processing unit 10 is not provided, the output from the sensor head 2 is the final output from the means for acquiring the surface data of the long body.
- the first surface data P1 obtained at the position L1 at time t can be expressed as P (t, L1).
- the second surface data P2 acquired at the position L2 at the same time t can be expressed as P (t, L2).
- FIG. 6 is a diagram showing an example of reference data.
- the rope 1 has a periodic pattern on the surface.
- a sine wave having the same period as the pattern formed on the surface of the rope 1 is stored in the storage unit 9 as the first reference data.
- a cosine wave having the same period as the pattern formed on the surface of the rope 1 is stored in the storage unit 9 as the second reference data.
- the first reference data Ref1 and the second reference data Ref2 can be expressed as a matrix of n rows and 1 column as follows.
- the first surface data P (t, L1), the second surface data P (t, L2), the first reference data Ref1, and the second reference data Ref2 are multidimensional vector data, that is, the number of elements n.
- An example of the vector will be described.
- the inner product of the first reference data Ref1 and the second reference data Ref2 is preferably 0 as in the example shown in FIG.
- the first reference data Ref1 and the second reference data Ref2 shown in FIG. 6 are sine waves having an orthogonal relationship. However, the inner product of the first reference data Ref1 and the second reference data Ref2 may not be zero.
- the first reference data Ref1 and the second reference data Ref2 are not limited to the example shown in FIG.
- the similarity calculation unit 11 calculates the similarity between the surface data and the reference data. For example, the similarity calculation unit 11 calculates a first similarity, a second similarity, a third similarity, and a fourth similarity.
- the first similarity is a similarity between the first surface data output from the data processing unit 10 and the first reference data stored in the storage unit 9.
- the second similarity is a similarity between the first surface data output from the data processing unit 10 and the second reference data stored in the storage unit 9.
- the third similarity is a similarity between the second surface data output from the data processing unit 10 and the first reference data stored in the storage unit 9.
- the fourth similarity is a similarity between the second surface data output from the data processing unit 10 and the second reference data stored in the storage unit 9.
- the similarity calculation unit 11 calculates the correlation coefficient ⁇ 1 (t, L1) between the first surface data P (t, L1) and the first reference data Ref1 as the first similarity.
- the similarity calculation unit 11 calculates a correlation coefficient ⁇ 2 (t, L1) between the first surface data P (t, L1) and the second reference data Ref2 as the second similarity.
- the similarity calculation unit 11 calculates a correlation coefficient ⁇ 1 (t, L2) between the second surface data P (t, L2) and the first reference data Ref1 as the third similarity.
- the similarity calculation unit 11 calculates a correlation coefficient ⁇ 2 (t, L2) between the second surface data P (t, L2) and the second reference data Ref2 as the fourth similarity.
- FIG. 7 is a diagram for explaining the function of the phase calculation unit 12.
- the phase calculation unit 12 calculates the deviation angle of the similarity vector S as the phase ⁇ .
- the phase calculation unit 12 calculates the phase ⁇ (t, L1) of the similarity vector S (t, L1) related to the first surface data.
- the similarity vector S (t, L1) is a vector having the correlation coefficient ⁇ 1 (t, L1) and the correlation coefficient ⁇ 2 (t, L1) calculated by the similarity calculation unit 11 as elements.
- the phase ⁇ (t, L1) is an argument of the similarity vector S (t, L1).
- the phase calculation unit 12 calculates the phase ⁇ (t, L2) of the similarity vector S (t, L2) related to the second surface data.
- the similarity vector S (t, L2) is a vector having the correlation coefficient ⁇ 1 (t, L2) and the correlation coefficient ⁇ 2 (t, L2) calculated by the similarity calculation unit 11 as elements.
- the phase ⁇ (t, L2) is an argument of the similarity vector S (t, L2).
- FIG. 7 shows the similarity vector S (t, L1) and the similarity vector on an orthogonal plane with the similarity to the first reference data Ref1 as the horizontal axis and the similarity to the second reference data Ref2 as the vertical axis.
- the example which plotted S (t, L2) is shown.
- the locus of the similarity vector S (t, L1) has a circular shape with a radius of 1 at the maximum.
- the locus of the similarity vector S (t, L2) has a circular shape with a radius of 1 at the maximum.
- the period calculation unit 13 calculates the period of the pattern formed on the surface of the rope 1. In the example shown in the present embodiment, as described above, the period matches the strand pitch of the rope 1. As shown in FIG. 7, the starting point of the similarity vector S is the origin. The end point of the similarity vector S is a point having coordinates of two similarity degrees calculated by the similarity vector element, that is, the similarity calculation unit 11. The phase ⁇ represents the direction of the similarity vector S. The period calculation unit 13 can calculate the strand pitch SP of the rope 1 by the following equation.
- the period calculation unit 13 calculates the strand pitch SP based on the phase ⁇ (t, L1) and the phase ⁇ (t, L2) calculated by the phase calculation unit 12. For example, the period calculation unit 13 calculates the strand pitch SP by calculating the positional change rate of the phase corresponding to the position change in the y-axis direction.
- the abnormality detection unit 14 detects an abnormality that has occurred in the rope 1.
- the abnormality detection unit 14 detects, for example, a cycle abnormality of the pattern formed on the long body based on the cycle calculated by the cycle calculation unit 13.
- the storage unit 9 stores in advance a reference range for determining that the pattern cycle is normal. If the period calculated by the period calculation unit 13 is within the reference range, the abnormality detection unit 14 determines that no pitch abnormality has occurred in the rope 1. The abnormality detection unit 14 determines that a pitch abnormality has occurred in the rope 1 if the cycle calculated by the cycle calculation unit 13 is not within the reference range.
- FIG. 8 is a flowchart showing an operation example of the detection apparatus according to Embodiment 1 of the present invention.
- FIG. 8 shows the processing flow described above.
- an alarm may be issued from the control device 3.
- the abnormality of the rope 1 can be detected even when the moving speed of the rope 1 is fluctuating.
- This detection device also has an advantage of high noise resistance.
- the control device 3 may further include a speed calculation unit 15 and a position calculation unit 16.
- the speed calculation unit 15 calculates the speed at which the rope 1 moves.
- the speed calculation unit 15 can calculate the moving speed V of the rope 1 at time t by the following equation.
- ⁇ t shown in the above equation is a time interval for acquiring the surface data.
- the speed calculation unit 15 calculates the moving speed of the rope 1 based on the phase ⁇ (t, L1) and the phase ⁇ (t, L2) calculated by the phase calculation unit 12. For example, the speed calculation unit 15 calculates the movement speed of the rope 1 by calculating the change of the phase ⁇ (t, L1) or the phase ⁇ (t, L2) with time.
- the position calculation unit 16 calculates the position of the abnormality that has occurred in the rope 1.
- the position calculation unit 16 calculates the position based on the moving speed V of the rope 1 calculated by the speed calculation unit 15.
- the position calculating unit 16 can specify how much the rope 1 has moved from the acquisition start position of the surface data by integrating the moving speed V of the rope 1 calculated by the speed calculating unit 15.
- the position calculation unit 16 calculates the position of the detected abnormality on the rope 1 based on the movement distance when the abnormality is detected by the abnormality detection unit 14. With the above calculation method, the position can be calculated even if the strand pitch of the rope 1 is unknown or fluctuates.
- the control device 3 may further include an invalid unit 17.
- the invalidation unit 17 invalidates the abnormality detection by the abnormality detection unit 14. As shown in FIG. 7, the locus of the similarity vector S (t, L1) is circular. If irregularities formed by twisting a plurality of strands are neatly arranged on the surface of the rope 1, the locus of the similarity vector S (t, L1) continues to draw a similar circle centered on the origin. .
- the locus of the similarity vector S (t, L1) changes so as to approach the origin. For this reason, if a normal range is set in advance for the norm of the similar vector S (t, L1), it can be detected that the reliability of the acquired surface data has become low.
- the normal range is set to 0.3 to 1, for example. The same is true for the similarity vector S (t, L2).
- the invalidation unit 17 invalidates the function that the abnormality detection unit 14 detects an abnormality based on the norm of the similarity vector S (t, L1). If the norm of the similarity vector S (t, L1) is out of the normal range, the invalid unit 17 prevents the abnormality detection unit 14 from detecting an abnormality.
- the invalidation part 17 may invalidate the function in which the abnormality detection part 14 detects abnormality based on the norm of the similarity vector S (t, L2). For example, the invalid unit 17 prevents the abnormality detection unit 14 from detecting an abnormality if the norm of the similarity vector S (t, L2) is out of the normal range.
- the invalidation unit 17 invalidates the abnormality detection by the abnormality detection unit 14 when both the norm of the similarity vector S (t, L1) and the norm of the similarity vector S (t, L2) are out of the normal range.
- the position calculating unit 16 may calculate the movement distance of the rope 1 using the strand pitch SP calculated immediately before. Thereby, an appropriate interpolation becomes possible.
- the control device 3 may further include an abnormality detection unit 18.
- the abnormality detection unit 18 detects an abnormality of the rope 1 that is different from the abnormality detected by the abnormality detection unit 14. For example, the abnormality detection unit 18 detects an abnormality of the pattern formed on the surface of the rope 1.
- the locus of the similarity vector S (t, L1) is circular. If there is no abnormality in signal transmission, the locus of the similarity vector S (t, L1) is the origin if the irregularities formed by twisting a plurality of strands are neatly arranged on the surface of the rope 1. Continue to draw a similar circle centered on. On the other hand, when a defect occurs in the winding due to non-uniform spacing between strands, the locus of the similarity vector S (t, L1) changes so as to approach the origin. Therefore, if a normal range is set in advance for the norm of the similar vector S (t, L1), it is possible to detect that an abnormality has occurred in the pattern formed on the surface of the rope 1. The normal range is set to 0.6 to 1, for example. The same is true for the similarity vector S (t, L2).
- the abnormality detection unit 18 detects that an abnormality has occurred in the pattern of the rope 1 based on the norm of the similarity vector S (t, L1). If the norm of the similarity vector S (t, L1) is out of the normal range, the abnormality detection unit 18 detects that an abnormality has occurred in the pattern of the rope 1. In the example shown in the present embodiment, the abnormality detection unit 18 detects a shape abnormality of the rope 1. The abnormality detection unit 18 may detect that an abnormality has occurred in the pattern of the rope 1 based on the norm of the similarity vector S (t, L2). For example, the abnormality detection unit 18 detects the shape abnormality of the rope 1 if the norm of the similarity vector S (t, L2) is out of the normal range. The abnormality detecting unit 18 detects the shape abnormality of the rope 1 when both the norm of the similarity vector S (t, L1) and the norm of the similarity vector S (t, L2) are out of the normal range. May be.
- the abnormality detection unit 18 When the abnormality of the pattern is detected by the abnormality detection unit 18, data that can confirm the abnormality may be stored in the storage unit 9. For example, when a pattern abnormality is detected by the abnormality detection unit 18, surface data used for detecting the abnormality is stored in the storage unit 9. As will be described later, the sensor head 2 may include a camera in order to acquire surface data. When the abnormality of the pattern is detected by the abnormality detection unit 18, the image data captured by the camera may be stored in the storage unit 9.
- FIG. 9 is a diagram for explaining another example of the sensor head 2.
- the sensor head 2 shown in FIG. 9 includes a light source 4, a light source 5, and a light receiving element 6, for example.
- FIG. 9 shows an example in which one light receiving element 6 receives both the light from the light source 4 reflected on the surface of the rope 1 and the light from the light source 5 reflected on the surface of the rope 1.
- FIG. 10 is a diagram illustrating a method of processing a received light image acquired by the light receiving element 6.
- the upper part of FIG. 10 shows a received light image of the light receiving element 6.
- the lower part of FIG. 10 shows the first surface data P1 and the second surface data P2 converted from the light reception image of the light receiving element 6. 10 indicates that the first surface data P1 and the second surface data P2 each include a plurality of data in the x direction. The number of data included in the surface data is arbitrarily determined.
- the sensor head 2 it is not necessary to provide the sensor head 2 with a plurality of light receiving elements. Moreover, if the wavelength of the light from the light source 4 and the wavelength of the light from the light source 5 are different, the surface data extraction process can be easily performed.
- the sensor head 2 is not limited to an optical profile measuring instrument.
- FIG. 11 and FIG. 12 are diagrams for explaining another example of the sensor head 2.
- the sensor head 2 shown in FIGS. 11 and 12 includes a camera 20, for example.
- the sensor head 2 may acquire data obtained from image data obtained by photographing the surface of the rope 1 with the camera 20 as surface data.
- the image data photographed by the camera 20 does not include information on the height.
- the sensor head 2 may acquire data representing the color and color density applied to the surface of the rope 1 as surface data. For example, the sensor head 2 acquires data representing colors and shades of colors assigned to ranges of x1 ⁇ x ⁇ xr and L1 ⁇ y ⁇ LM on the surface of the rope 1. This data corresponds to M surface data.
- the sensor head 2 outputs two preset surface data as the first surface data and the second surface data from the M surface data.
- FIG. 13 is a diagram illustrating a method of processing image data captured by the camera 20.
- Embodiment 2 an example for improving the calculation accuracy of the strand pitch SP will be described.
- the detection device in the present embodiment is the same as the example shown in FIG. 11, for example.
- the detection device includes a sensor head 2 and a control device 3, for example.
- the sensor head 2 includes a camera 20, for example.
- the sensor head 2 acquires, for example, data representing the color and shade of the color attached to the surface of the rope 1 as surface data.
- the sensor head 2 acquires M surface data from the image data acquired by the camera 20.
- M is a natural number of 3 or more, for example.
- FIG. 14 is a diagram illustrating an example of the control device 3 according to Embodiment 2 of the present invention.
- the control device 3 includes a storage unit 9, a data processing unit 10, a selection unit 19, a similarity calculation unit 11, a phase calculation unit 12, a period calculation unit 13, and an abnormality detection unit 14.
- the control device 3 may not include the data processing unit 10.
- the control device 3 may further include a speed calculation unit 15, a position calculation unit 16, an invalid unit 17, and an abnormality detection unit 18.
- the first reference data Ref1 and the second reference data Ref2 are stored in the storage unit 9.
- the first reference data Ref1 can be expressed as a matrix of n rows and 1 column.
- the second reference data Ref2 can be expressed as a matrix of n rows and 1 column.
- the data processing unit 10 processes each surface data received from the sensor head 2 into surface data that can be compared with reference data. For example, the data processing unit 10 performs a bias removal process on each of the surface data received from the sensor head 2. From the data processing unit 10, for example, M pieces of surface data P (t, L1), P (t, L2),..., P (t, LM) subjected to bias removal processing are output.
- the selection unit 19 selects the first surface data P (t, L ⁇ ) and the second surface data P (t, t, L from the M surface data output from the data processing unit 10 based on a preset condition. L ⁇ ).
- the similarity calculation unit 11 calculates the similarity between the surface data selected by the selection unit 19 and the reference data. That is, the similarity calculation unit 11 calculates the first similarity, the second similarity, the third similarity, and the fourth similarity.
- the first similarity is a similarity between the first surface data selected by the selection unit 19 and the first reference data stored in the storage unit 9.
- the second similarity is a similarity between the first surface data selected by the selection unit 19 and the second reference data stored in the storage unit 9.
- the third similarity is a similarity between the second surface data selected by the selection unit 19 and the first reference data stored in the storage unit 9.
- the fourth similarity is a similarity between the second surface data selected by the selection unit 19 and the second reference data stored in the storage unit 9.
- phase calculation unit 12 is the same as the function disclosed in the first embodiment.
- period calculation unit 13 is the same as the function disclosed in the first embodiment.
- the function of the abnormality detection unit 14 is the same as the function disclosed in the first embodiment.
- FIG. 15 is a flowchart showing an operation example of the detection apparatus according to Embodiment 2 of the present invention.
- M surface data are output from the data processing unit 10 (S201).
- the selection unit 19 selects the first surface data P (t, L ⁇ ) and the second surface data P (t, L ⁇ ) from the M surface data output from the data processing unit 10 (S202). .
- the similarity calculation unit 11 calculates the similarity with the first reference data and the similarity with the second reference data for each surface data output from the data processing unit 10.
- FIG. 15 shows an example in which the correlation coefficient ⁇ 1 is calculated as the similarity to the first reference data, and the correlation coefficient ⁇ 2 is calculated as the similarity to the second reference data.
- a similarity vector S having the correlation coefficient ⁇ 1 and the correlation coefficient ⁇ 2 as elements is calculated for each surface data.
- the norm of the similarity vector S is calculated for each surface data.
- the selection unit 19 selects the first surface data P (t, L ⁇ ) and the second surface data P (t, L ⁇ ) based on the norm of the calculated similarity vector S, for example.
- FIG. 16 is a diagram for explaining the function of the selection unit 19. For example, among the M pieces of surface data output from the data processing unit 10, the selection unit 19 determines the first surface data P (t, L ⁇ ) and second surface data P (t, L ⁇ ). Here, L ⁇ > L ⁇ .
- the similarity vector S (t, L ⁇ ) is a vector having the correlation coefficient ⁇ 1 (t, L ⁇ ) and the correlation coefficient ⁇ 2 (t, L ⁇ ) calculated by the similarity calculation unit 11 as elements.
- the phase ⁇ (t, L ⁇ ) is a deviation angle of the similarity vector S (t, L ⁇ ).
- the phase calculation unit 12 calculates the phase ⁇ (t, L ⁇ ) of the similarity vector S (t, L ⁇ ) (S203).
- the similarity vector S (t, L ⁇ ) is a vector having the correlation coefficient ⁇ 1 (t, L ⁇ ) and the correlation coefficient ⁇ 2 (t, L ⁇ ) calculated by the similarity calculation unit 11 as elements.
- the phase ⁇ (t, L ⁇ ) is an argument of the similarity vector S (t, L ⁇ ).
- the period calculation unit 13 calculates the strand pitch SP from the following equation based on the phase ⁇ (t, L ⁇ ) and the phase ⁇ (t, L ⁇ ) calculated by the phase calculation unit 12, for example.
- the abnormality detection unit 14 detects a cycle abnormality of the pattern formed on the long body based on the cycle calculated by the cycle calculation unit 13. For example, the abnormality detection unit 14 determines that a pitch abnormality has occurred in the rope 1 when the period calculated by the period calculation unit 13 is out of the reference range.
- the abnormality of the rope 1 can be detected even when the moving speed of the rope 1 is fluctuating.
- the calculation accuracy of the strand pitch SP can be improved.
- the selection unit 19 may select the first surface data P (t, L ⁇ ) and the second surface data P (t, L ⁇ ) by a method different from the method described above. For example, the selection unit 19 first selects, from among the M pieces of surface data output from the data processing unit 10, those whose similarity vector S has a norm equal to or greater than a reference value.
- the reference value is stored in advance in the storage unit 9. For example, the reference value is 0.3.
- the selection unit 19 selects the two pieces of the first surface data P (t, L ⁇ ) and the second surface data P (t, L ⁇ ) that have the maximum angle formed from those having the norm of the similarity vector S equal to or greater than the reference value. ) To select.
- any of the features disclosed in the first embodiment may be adopted.
- Embodiment 3 As described above, a wire rope used in an elevator is an example of a long body that is a detection target of the detection device.
- the elevator car is suspended from the hoistway by, for example, a plurality of wire ropes.
- the elevator car is suspended by a plurality of wire ropes, it is desirable that the same tension acts on any wire rope.
- the detection device sets a plurality of long bodies as detection targets.
- FIG. 17 is a diagram showing an example of a detection apparatus according to Embodiment 3 of the present invention.
- 18 is a view of the long body viewed from the direction of arrow A shown in FIG.
- FIG. 18 shows an example in which a rope 21 is arranged in parallel with the rope 1.
- the rope 21 moves in the longitudinal direction in the same manner as the rope 1.
- the rope 21 moves in the + y direction or the ⁇ y direction.
- the rope 21 may move in both the + y direction and the ⁇ y direction.
- the rope 21 includes a plurality of strands.
- the rope 21 is formed by twisting a plurality of strands.
- the rope 21 has the same pattern on the surface as the pattern formed on the surface of the rope 1.
- the detection device includes a sensor head 2 and a control device 3, for example.
- the sensor head 2 includes a light source 4 and a light receiving element 6, for example.
- the light source 4 irradiates both the surface of the rope 1 and the surface of the rope 21 simultaneously.
- 17 and 18 show an example in which the light source 4 irradiates laser light in the longitudinal direction of the rope 1 and the direction orthogonal to the longitudinal direction of the rope 21.
- the light emitted from the light source 4 hits the rope 1 and the rope 21 at the same height.
- the light emitted from the light source 4 strikes linearly from one end of the rope 1 to the other end so as to cross the rope 1.
- the light emitted from the light source 4 strikes linearly from one end of the rope 21 to the other end so as to cross the rope 21.
- the light receiving element 6 receives light reflected from the surface of the rope 1 among the light emitted from the light source 4.
- the light receiving element 6 receives light reflected from the surface of the rope 21 among the light emitted from the light source 4.
- the light receiving element 6 is disposed obliquely with respect to the direction in which the light source 4 emits light.
- the light receiving element 6 receives light reflected obliquely at a certain angle with respect to the longitudinal direction of the rope 1 out of light from the light source 4 reflected on the surface of the rope 1.
- the light receiving element 6 receives light reflected obliquely at a certain angle with respect to the longitudinal direction of the rope 1 among the light from the light source 4 reflected on the surface of the rope 21.
- the light a shown in FIGS. 17 and 18 is light emitted from the light source 4 toward the rope 1.
- the light b and the light c are light reflected at an angle received by the light receiving element 6 among the light a reflected from the surface of the rope 1.
- the sensor head 2 acquires data representing the cross-sectional shape of the portion of the rope 1 that has been irradiated with light from the light source 4 as first surface data.
- the light g shown in FIGS. 17 and 18 is light emitted from the light source 4 toward the rope 21.
- the light h and the light i are light reflected at an angle received by the light receiving element 6 out of the light g reflected on the surface of the rope 21.
- the sensor head 2 acquires data indicating a cross-sectional shape of a portion of the rope 21 that has been irradiated with light from the light source 4 as second surface data.
- FIG. 19 is a diagram illustrating a method of processing a received light image acquired by the light receiving element 6.
- the upper part of FIG. 19 shows a received light image of the light receiving element 6.
- the lower part of FIG. 19 shows the first surface data P3 and the second surface data P4 converted from the light reception image of the light receiving element 6.
- the horizontal axis in the lower part of FIG. 19 indicates that the first surface data P3 and the second surface data P4 each include a plurality of data in the x direction.
- the number of data included in the surface data is arbitrarily determined.
- FIG. 20 is a diagram illustrating an example of the control device 3.
- the control device 3 includes a storage unit 9, a data processing unit 10, a similarity calculation unit 11, a phase calculation unit 12, and an abnormality detection unit 14, for example.
- the control device 3 may not include the data processing unit 10.
- the control device 3 may further include an invalid unit 17 and an abnormality detection unit 18.
- the first reference data Ref1 and the second reference data Ref2 are stored in the storage unit 9.
- the first reference data Ref1 can be expressed as a matrix of n rows and 1 column.
- the second reference data Ref2 can be expressed as a matrix of n rows and 1 column.
- the data processing unit 10 processes the first surface data received from the sensor head 2, for example, and outputs the processed data as final first surface data.
- the data processing unit 10 processes the second surface data received from the sensor head 2 and outputs the processed data as final second surface data.
- the similarity calculation unit 11 calculates the similarity between the surface data and the reference data. For example, the similarity calculation unit 11 calculates the first correlation coefficient ⁇ 1 (t, L1 (P3)) between the first surface data P3 (t, L1) output from the data processing unit 10 and the first reference data Ref1. Calculated as similarity. The similarity calculation unit 11 uses the correlation coefficient ⁇ 2 (t, L1 (P3)) between the first surface data P3 (t, L1) and the second reference data Ref2 output from the data processing unit 10 as the second similarity.
- the similarity calculation unit 11 uses the correlation coefficient ⁇ 1 (t, L1 (P4)) between the second surface data P4 (t, L1) output from the data processing unit 10 and the first reference data Ref1 as the third similarity.
- the similarity calculation unit 11 uses the correlation coefficient ⁇ 2 (t, L1 (P4)) between the second surface data P4 (t, L1) output from the data processing unit 10 and the second reference data Ref2 as the fourth similarity.
- FIG. 21 is a diagram for explaining the function of the phase calculation unit 12.
- the phase calculation unit 12 calculates the deviation angle of the similarity vector S as the phase ⁇ .
- the phase calculation unit 12 calculates the phase ⁇ 3 (t, L1) of the similarity vector S3 (t, L1) related to the first surface data.
- the similarity vector S3 (t, L1) has the correlation coefficient ⁇ 1 (t, L1 (P3)) and the correlation coefficient ⁇ 2 (t, L1 (P3)) calculated by the similarity calculation unit 11 as elements. Is a vector.
- the phase ⁇ 3 (t, L1) is a deviation angle of the similarity vector S3 (t, L1).
- the phase calculation unit 12 calculates the phase ⁇ 4 (t, L1) of the similarity vector S4 (t, L1) related to the second surface data.
- the similarity vector S4 (t, L1) has the correlation coefficient ⁇ 1 (t, L1 (P4)) and the correlation coefficient ⁇ 2 (t, L1 (P4)) calculated by the similarity calculation unit 11 as elements. Is a vector.
- the phase ⁇ 4 (t, L1) is a deviation angle of the similarity vector S4 (t, L1).
- the speed at which the rope 1 moves and the speed at which the rope 21 moves are the same. If the strand pitch of the rope 1 and the strand pitch of the rope 21 are the same, the angle formed by the similarity vector S3 (t, L1) and the similarity vector S4 (t, L1) is constant regardless of the speed. Become.
- the angle formed by the similarity vector S3 (t, L1) and the similarity vector S4 (t, L1) is the difference between the phase ⁇ 4 (t, L1) and the phase ⁇ 3 (t, L1), that is, the phase difference.
- the abnormality detection unit 14 has an abnormality in the rope 1 or the rope 21 based on the phase ⁇ 4 (t, L1) and the phase ⁇ 3 (t, L1) calculated by the phase calculation unit 12. Detect what happened. For example, the abnormality detection unit 14 detects a period abnormality of the pattern formed on the surface of the rope 1 or the pattern formed on the surface of the rope 21.
- the storage unit 9 stores in advance a reference range for determining that the pattern cycle is normal. If the difference between the phase ⁇ 4 (t, L1) and the phase ⁇ 3 (t, L1) is within the reference range, the abnormality detection unit 14 indicates that there is no pitch abnormality in both the rope 1 and the rope 21. judge. If the difference between the phase ⁇ 4 (t, L1) and the phase ⁇ 3 (t, L1) is not within the reference range, the abnormality detection unit 14 generates a pitch abnormality in either the rope 1 or the rope 21. It is determined that
- the detection device can target a plurality of long bodies. In the example shown in the present embodiment, it can be detected that an abnormality has occurred even when the moving speeds of the rope 1 and the rope 21 are fluctuating.
- the abnormality detection unit 18 when the control device 3 further includes the abnormality detection unit 18, the abnormality detection unit 18 has an abnormality in the pattern of the rope 1 based on the norm of the similarity vector S3 (t, L1). Detect that. For example, if the norm of the similarity vector S3 (t, L1) is out of the normal range, the abnormality detection unit 18 detects that an abnormality has occurred in the pattern of the rope 1. Further, the abnormality detection unit 18 detects that an abnormality has occurred in the pattern of the rope 21 based on the norm of the similarity vector S4 (t, L1). For example, if the norm of the similarity vector S4 (t, L1) is out of the normal range, the abnormality detection unit 18 detects that an abnormality has occurred in the pattern of the rope 21.
- the control device 3 further includes a period calculation unit 13, a velocity calculation unit 15, and a position calculation unit 16 in the example shown in the present embodiment. Also good.
- the sensor head 2 includes a light source 4, a light source 5, a light receiving element 6, and a light receiving element 7, for example.
- the light source 4 irradiates the surface of the rope 1 with light.
- the light receiving element 6 receives light reflected from the surface of the rope 1 among the light irradiated from the light source 4.
- the light source 5 irradiates the surface of the rope 21 with light.
- the light emitted from the light source 5 strikes the rope 21 at a position away from the position where the light from the light source 4 strikes the rope 1 by a certain distance in the y-axis direction.
- the light receiving element 7 receives light reflected from the surface of the rope 21 among the light emitted from the light source 5.
- the sensor head 2 may include a camera 20.
- the speed calculation unit 15 calculates the moving speeds of the rope 1 and the rope 21 based on the phase ⁇ (t, L1) and the phase ⁇ (t, L2) calculated by the phase calculation unit 12.
- L ⁇ b> 2 indicates a height at which the light from the light source 5 hits the rope 21.
- the position calculation unit 16 calculates the position of the detected abnormality on the rope 1 or the position on the rope 21 based on the moving distance when the abnormality is detected by the abnormality detection unit 14.
- any of the features disclosed in the first or second embodiment may be employed.
- Embodiment 4 An elevator to which the present detection apparatus can be applied is provided with a governor for detecting the speed of the car.
- the speed governor includes, for example, a speed control rope, a speed control sheave, and an encoder.
- the speed control rope is wound around the speed control sheave and moves in conjunction with the elevator car. That is, when the car moves, the governing rope moves. Further, when the speed control rope moves, the speed control sheave rotates.
- the encoder outputs a rotation signal corresponding to the rotation direction and rotation angle of the governing sheave. The rotation signal output from the encoder is used to control the car.
- the speed calculation unit 15 calculates the moving speed V of the rope 1. If the elevator car is suspended by the rope 1, the moving speed V of the rope 1 matches the moving speed of the car. For this reason, in the elevator, the speed of the car may be detected using the speed calculation unit 15 instead of the governor. In such a case, the elevator may not have a governor. In the elevator, the speed of the car may be detected using the speed calculator 15 together with the speed governor.
- a detection error may occur due to a slip generated between a governor rope and a governor sheave.
- a detection error may occur due to wear of the governor sheave. If it is this detection apparatus, acquisition of surface data can be performed without contact. For this reason, the speed of the car can be detected with high accuracy. Furthermore, if it is not necessary to provide a governor, the construction of the elevator can be simplified.
- FIG. 22 is a diagram illustrating an example of a hardware configuration of the control device 3.
- the control device 3 includes a processing circuit including, for example, a processor 22 and a memory 23 as hardware resources.
- the functions of the storage unit 9 are realized by the memory 23.
- the control device 3 executes the program stored in the memory 23 by the processor 22, thereby realizing the functions of the units indicated by reference numerals 10 to 19.
- the processor 22 is also called a CPU (Central Processing Unit), a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a DSP.
- a semiconductor memory a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD may be employed.
- Semiconductor memories that can be used include RAM, ROM, flash memory, EPROM, EEPROM, and the like.
- control device 3 may be realized by hardware.
- hardware for realizing the functions of the control device 3 a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof may be employed.
- the detection apparatus according to the present invention can be applied to an apparatus for detecting a long body having a periodic pattern on the surface.
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Abstract
Description
図1は、この発明の実施の形態1における検出装置の例を示す図である。検出装置は、長尺体の異常を検出するための装置である。長尺体には、例えばロープ1が含まれる。図2は、図1に示す矢印Aの方向から長尺体を見た図である。
制御装置3は、速度算出部15及び位置算出部16を更に備えても良い。速度算出部15は、ロープ1が移動する速度を算出する。速度算出部15は、時刻tにおけるロープ1の移動速度Vを次式によって算出できる。
本実施の形態では、ストランドピッチSPの算出精度を向上させるための例について説明する。本実施の形態における検出装置は、例えば図11に示す例と同様である。検出装置は、例えばセンサヘッド2と制御装置3とを備える。センサヘッド2は、例えばカメラ20を備える。
上述したように、本検出装置の検出対象となる長尺体の例として、エレベーターで使用されるワイヤロープが挙げられる。エレベーターのかごは、例えば複数本のワイヤロープによって昇降路に吊り下げられる。エレベーターのかごが複数本のワイヤロープで吊り下げられている場合、どのワイヤロープに対しても同じ張力が作用することが望ましい。
本検出装置が適用可能なエレベーターには、かごの速度を検出するために調速機が備えられる。調速機は、例えば調速ロープ、調速綱車及びエンコーダを備える。調速ロープは、調速綱車に巻き掛けられ、エレベーターのかごに連動して移動する。即ち、かごが移動すると、調速ロープが移動する。また、調速ロープが移動すると、調速綱車が回転する。エンコーダは、調速綱車の回転方向及び回転角度に応じた回転信号を出力する。エンコーダから出力された回転信号は、かごを制御するために利用される。
2 センサヘッド
3 制御装置
4 光源
5 光源
6 受光素子
7 受光素子
8 信号線
9 記憶部
10 データ処理部
11 類似度算出部
12 位相算出部
13 周期算出部
14 異常検出部
15 速度算出部
16 位置算出部
17 無効部
18 異常検出部
19 選択部
20 カメラ
21 ロープ
22 プロセッサ
23 メモリ
Claims (11)
- 表面に周期的な模様を有する長尺体の第1表面データ及び第2表面データを取得するデータ取得手段と、
第1リファレンスデータ及び第2リファレンスデータを記憶する記憶手段と、
前記データ取得手段によって取得された第1表面データと前記第1リファレンスデータの第1類似度、前記データ取得手段によって取得された第1表面データと前記第2リファレンスデータの第2類似度、前記データ取得手段によって取得された第2表面データと前記第1リファレンスデータの第3類似度、及び前記データ取得手段によって取得された第2表面データと前記第2リファレンスデータの第4類似度を算出する類似度算出手段と、
前記類似度算出手段によって算出された第1類似度及び第2類似度を要素とする第1類似度ベクトルの偏角を第1位相として算出し、前記類似度算出手段によって算出された第3類似度及び第4類似度を要素とする第2類似度ベクトルの偏角を第2位相として算出する位相算出手段と、
前記位相算出手段によって算出された第1位相及び第2位相に基づいて、前記長尺体に形成された模様の周期を算出する周期算出手段と、
前記周期算出手段によって算出された周期に基づいて、前記長尺体の異常を検出する第1異常検出手段と、
を備えた検出装置。 - 表面に周期的な模様を有する長尺体の複数の表面データを取得するデータ取得手段と、
第1リファレンスデータ及び第2リファレンスデータを記憶する記憶手段と、
前記データ取得手段によって取得された表面データの中から第1表面データ及び第2表面データを選択する選択手段と、
前記選択手段によって選択された第1表面データと前記第1リファレンスデータの第1類似度、前記選択手段によって選択された第1表面データと前記第2リファレンスデータの第2類似度、前記選択手段によって選択された第2表面データと前記第1リファレンスデータの第3類似度、及び前記選択手段によって選択された第2表面データと前記第2リファレンスデータの第4類似度を算出する類似度算出手段と、
前記類似度算出手段によって算出された第1類似度及び第2類似度を要素とする第1類似度ベクトルの偏角を第1位相として算出し、前記類似度算出手段によって算出された第3類似度及び第4類似度を要素とする第2類似度ベクトルの偏角を第2位相として算出する位相算出手段と、
前記位相算出手段によって算出された第1位相及び第2位相に基づいて、前記長尺体に形成された模様の周期を算出する周期算出手段と、
前記周期算出手段によって算出された周期に基づいて、前記長尺体の異常を検出する第1異常検出手段と、
を備えた検出装置。 - 前記選択手段は、前記データ取得手段によって取得された表面データのうち、前記第1リファレンスデータとの類似度及び前記第2リファレンスデータとの類似度を要素とする類似度ベクトルのノルムが1番大きいものと2番目に大きいものとを第1表面データ及び第2表面データとして選択する請求項2に記載の検出装置。
- 前記選択手段は、前記データ取得手段によって取得された表面データのうち、前記第1リファレンスデータとの類似度及び前記第2リファレンスデータとの類似度を要素とする類似度ベクトルのノルムが基準値以上のものの中から、なす角度が最大になる2つのものを第1表面データ及び第2表面データとして選択する請求項2に記載の検出装置。
- 前記位相算出手段によって算出された第1位相及び第2位相に基づいて、前記長尺体の速度を算出する速度算出手段と、
前記速度算出手段によって算出された速度に基づいて、前記第1異常検出手段によって検出された異常の前記長尺体上での位置を算出する位置算出手段と、
を更に備えた請求項1から請求項4の何れか一項に記載の検出装置。 - 前記類似度算出手段によって算出された第1類似度及び第2類似度を要素とする第1類似度ベクトルのノルム又は前記類似度算出手段によって算出された第3類似度及び第4類似度を要素とする第2類似度ベクトルのノルムの少なくとも何れか一方に基づいて、前記長尺体の模様に異常が発生したことを検出する第2異常検出手段を更に備えた請求項1から請求項5の何れか一項に記載の検出装置。
- 前記データ取得手段は、
前記長尺体に光を照射する第1光源と、
前記第1光源からの光の波長とは異なる波長の光を前記長尺体に照射する第2光源と、
前記長尺体で反射した前記第1光源からの光及び前記長尺体で反射した前記第2光源からの光を受ける受光素子と、
を備えた請求項1から請求項6の何れか一項に記載の検出装置。 - 表面に周期的な模様を有する第1長尺体の第1表面データ及び前記第1長尺体の表面に形成された模様と同じ模様を表面に有する第2長尺体の第2表面データを取得するデータ取得手段と、
第1リファレンスデータ及び第2リファレンスデータを記憶する記憶手段と、
前記データ取得手段によって取得された第1表面データと前記第1リファレンスデータの第1類似度、前記データ取得手段によって取得された第1表面データと前記第2リファレンスデータの第2類似度、前記データ取得手段によって取得された第2表面データと前記第1リファレンスデータの第3類似度、及び前記データ取得手段によって取得された第2表面データと前記第2リファレンスデータの第4類似度を算出する類似度算出手段と、
前記類似度算出手段によって算出された第1類似度及び第2類似度を要素とする第1類似度ベクトルの偏角を第1位相として算出し、前記類似度算出手段によって算出された第3類似度及び第4類似度を要素とする第2類似度ベクトルの偏角を第2位相として算出する位相算出手段と、
前記位相算出手段によって算出された第1位相及び第2位相に基づいて、前記第1長尺体又は前記第2長尺体に異常が発生したことを検出する第1異常検出手段と、
を備えた検出装置。 - 前記類似度算出手段によって算出された第1類似度及び第2類似度を要素とする第1類似度ベクトルのノルムに基づいて前記第1長尺体の模様に異常が発生したことを検出し、前記類似度算出手段によって算出された第3類似度及び第4類似度を要素とする第2類似度ベクトルのノルムに基づいて前記第2長尺体の模様に異常が発生したことを検出する第2異常検出手段を更に備えた請求項8に記載の検出装置。
- 前記データ取得手段は、
前記第1長尺体及び前記第2長尺体に光を照射する光源と、
前記第1長尺体で反射した前記光源からの光及び前記第2長尺体で反射した前記光源からの光を受ける受光素子と、
を備えた請求項8又は請求項9に記載の検出装置。 - 前記類似度算出手段によって算出された第1類似度及び第2類似度を要素とする第1類似度ベクトルのノルム又は前記類似度算出手段によって算出された第3類似度及び第4類似度を要素とする第2類似度ベクトルのノルムの少なくとも何れか一方に基づいて、前記第1異常検出手段による異常検出を無効にする無効手段を更に備えた請求項1から請求項10の何れか一項に記載の検出装置。
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CN109341538A (zh) * | 2018-10-17 | 2019-02-15 | 太原科技大学 | 一种测量轴承偏移量的测量方法 |
JP2020034387A (ja) * | 2018-08-29 | 2020-03-05 | オーチス エレベータ カンパニーOtis Elevator Company | エレベータロープ伸び計測装置及びエレベータロープ伸び計測方法 |
JP2021021664A (ja) * | 2019-07-30 | 2021-02-18 | 株式会社明電舎 | エレベータ用ワイヤロープの速度検出装置、エレベータ用ワイヤロープの速度検出方法 |
WO2024171431A1 (ja) * | 2023-02-17 | 2024-08-22 | 三菱電機株式会社 | 情報処理装置、検出方法、及び検出プログラム |
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