JP2005126175A - Diagnosing device for escalator handrail - Google Patents

Diagnosing device for escalator handrail Download PDF

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Publication number
JP2005126175A
JP2005126175A JP2003362252A JP2003362252A JP2005126175A JP 2005126175 A JP2005126175 A JP 2005126175A JP 2003362252 A JP2003362252 A JP 2003362252A JP 2003362252 A JP2003362252 A JP 2003362252A JP 2005126175 A JP2005126175 A JP 2005126175A
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Prior art keywords
handrail
image
power spectrum
deterioration
ray transmission
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Pending
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JP2003362252A
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Japanese (ja)
Inventor
Kiyoshi Naganuma
Hiroshi Yamazaki
浩 山崎
清 長沼
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Hitachi Building Systems Co Ltd
株式会社日立ビルシステム
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Priority to JP2003362252A priority Critical patent/JP2005126175A/en
Publication of JP2005126175A publication Critical patent/JP2005126175A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnosing device for an escalator handrail capable of indicating quantitatively the propagating situation of handrail deterioration and exhaustion of the life. <P>SOLUTION: The diagnosing device for the escalator handrail is structured so that a two-dimensional FFT treatment is applied to X-ray fluoroscopic images 1, 2, 3, 4 of a tension resisting body such as steel cords etc. in the handrail, and a judging mask 5 is applied to the two-dimensional FFT treated images 11, 21, 31, 41 in which weighting is made for the characteristic deteriorating situation of the handrail, and thereby the degree of deterioration can be calculated quantitatively. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an escalator handrail diagnostic apparatus for diagnosing deterioration of an escalator handrail, and in particular, diagnosing the state of a tensile body in the handrail using an X-ray transmission image of the handrail. The present invention relates to an image processing apparatus and an image determination method suitable for performing.

In general, an escalator is provided with a handrail that moves in the same direction in synchronism with the step of placing the passenger, and the passenger grasps the handrail while traveling to stabilize the body and prevent falling. This handrail is thought to be out of sync with the step because the rubber constituting the handrail stretches and loses tension due to temperature changes and long-term use, etc. A tensile body such as a steel cord is embedded inside, but if this steel cord is also used for a long period of time, it may move or overlap in the handrail, resulting in fracture due to metal fatigue. Therefore, for the purpose of investigating the situation of this steel cord, the X-ray that has passed through the handrail is displayed as an image, and the state of the steel cord in the handrail can be observed on the spot with high accuracy. A handrail X-ray flaw detector has been proposed (see Patent Document 1).
On the other hand, with respect to the technology for performing image processing on the acquired image and determining the presence or absence of a defect of the target object from the image processing result, for example, detecting the occurrence state of wrinkles occurring on the film on the roll by image processing, A defect detection device and a defect detection method for a film on a roll have been proposed (see Patent Document 2).
Japanese Patent Laid-Open No. 10-10060 (paragraphs 8 to 20, FIG. 1) JP 2001-143070 (paragraphs 14 to 46, FIG. 1)

  By the way, when the diagnosis is performed using the X-ray flaw detector proposed in Patent Document 1, the determination of the diagnosis result depends on the determination by the observer's visual observation, and the determination result is obtained quantitatively and recorded. No way to do it was proposed. Further, in the defect detection method proposed in Patent Document 2, various defects can be detected. However, the defect level, for example, a minor defect that can be left unattended, is a severe defect that hinders operation. No consideration was given to whether or not there was.

  In order to solve the above-mentioned problem, the present invention aims to quantitatively determine the deterioration status of the escalator handrail, and for the escalator handrail having a tensile body such as metal inside, In accordance with an X-ray generation device that generates X-rays so as to pass through the handrail, an image input device that picks up X-rays that have passed through the handrail as an image, and an X-ray transmission image obtained by the image input device A two-dimensional fast Fourier transform process for the X-ray transmission image of the handrail imaged by the image processing device. Based on the processing results of the fast Fourier transform processing unit and the two-dimensional fast Fourier transform unit, an image judgment for determining the presence or absence of the tensile body of the handrail. It was characterized by providing the part.

Further, the present invention is the image processing apparatus, wherein the image processing unit is configured to apply a predetermined region of each power spectrum to a power spectrum obtained by two-dimensional fast Fourier transform of the X-ray transmission image. A weighted mask is applied, and the deterioration state of the handrail is determined using the total power spectrum of the portion corresponding to the mask of the power spectrum and the weighting coefficient.

In the image processing apparatus, the image processing unit may determine a situation such as a non-uniform spacing, a skew, and a crossing of the tensile bodies in the hand rail as a deterioration state of the hand rail. .

  The effect of claim 1 is that it is possible to obtain the deterioration status of the handrail of the escalator as the degree of deterioration based on the image processing result of the X-ray transmission image instead of the subjective judgment of the observer, and as a result It is possible to provide a suitable determination index when performing life management.

The effect of claim 2 is that the power spectrum generated due to the deterioration situation (non-uniform steel cord spacing) that does not interfere with the use of the handrail when determining the deterioration degree of the handrail, and the continuation of the handrail For example, when diagnosing handrails of different types with different deterioration progress, because it is possible to individually weight the power spectrum generated due to deterioration conditions (steel cord skew, crossing) that hinder use In addition, by changing the weighting coefficient, it is possible to perform an appropriate response.

In addition, as an effect of claim 3, by appropriately setting the weighting coefficient, it is possible to clearly correspond the numerical value indicating the degree of deterioration of the handrail and the deterioration state of the handrail. Therefore, it is possible to provide a management index suitable for managing the life of the handrail.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a diagram showing an internal structure of a handrail to be diagnosed according to the present invention, and FIG. 1 is a diagram showing an X-ray transmission image of the handrail and a two-dimensional FFT processed image thereof. In FIG. 3, the handrail 9 includes a decorative rubber 90, an upper canvas 91, a tensile body 10 such as a steel cord, and lower canvases 92 and 93. A material such as rubber (FIG. (Not shown) is filled. In a normal handrail, the steel cords 10 are arranged at equal intervals, and an X-ray transmission image of the normal handrail is as shown in an image 1 in FIG. Here, when the handrail deteriorates due to long-term use, the filled rubber deteriorates, and a gap is generated between the upper canvas 91, the steel cord 10, and the lower canvas 92. When such a deterioration situation occurs, the restraint of the steel cord 10 can be released, so that a non-uniform distribution of the steel cord (image 2), skew (image 3), and crossing (image 4) occur. When such a steel cord abnormality occurs, metal fatigue or rubbing wear of the steel cord occurs, so that the steel cord deteriorates and breaks, leading to the service life of the handrail.

  In the present invention, the deterioration state of the handrail as described above is determined using an X-ray transmission image. In FIG. 1, images 11 to 41 are images obtained by performing two-dimensional FFT processing on the X-ray transmission images (images 1 to 4) corresponding to the deterioration state of the handrail. Here, in order to facilitate discrimination, power spectrum calculation, logarithmic conversion of image density, and enlargement in the left-right direction (twice) are performed on the result of the two-dimensional FFT processing.

In the two-dimensional FFT processed image 11 of the X-ray transmission image 1 of the normal handrail steel cord, the power spectrum concentrates in the vicinity of the specific spatial frequency region 51 in the region of the determination mask 5. This is due to the fact that the spatial frequency by the steel cords of equal intervals is constant.

  Next, in the two-dimensional FFT processed image 21 of the X-ray transmission image 2 of the handrail in which the steel cord interval is not uniform, the vertical spatial frequency changes, so the region of the determination mask 5 Among these, the power spectrum in the region 52 (when the density of the steel cord is high) and the region 53 (when the density of the steel cord is low) is increased.

  Next, in the two-dimensional FFT-processed image 31 of the X-ray transmission image 3 of the handrail in a state where the steel cord is skewed inside, the power spectrum (diagonal direction) corresponding to the bending angle of the handrail increases. . Therefore, the power spectrum in the region 54 or the region 55 in the region of the determination mask 5 becomes strong.

  Next, in the two-dimensional FFT processing image 41 of the X-ray transmission image 4 of the handrail in a state where the steel cords intersect, a spatial frequency is generated by each intersecting steel cord, and the determination mask 5 The power spectrum in both the regions 54 and 55 becomes strong. In the situation where the crossing of steel cords occurs in the handrail, the handrail has reached the end of its life, and if it is used continuously, the steel cord will pop out, etc., so replacement is necessary. It is.

  As described above, since the characteristics of the power spectrum appearing in the two-dimensional FFT processing image are generated depending on the status of the steel cord 10 in the handrail 9, the situation of the steel cord in the handrail is utilized using this feature. Thus, it is possible to quantitatively carry out a survey of handrail deterioration and life reaching.

  FIG. 2 shows a device configuration of the handrail deterioration diagnosis device 6 for realizing the embodiment, and FIG. In FIG. 2, the X-ray source 7 is disposed so as to transmit the X-ray 8 to the handrail 9, and the X-ray transmitted through the handrail 9 and the steel cord 10 is issued when the X-ray hits. The image is visualized by using a fluorescent plate and an image intensifier 61 using a microchannel plate for multiplying electrons, and an X-ray transmission image 62 is presented to the CCD camera 63.

In the weighting coefficient storage unit 66, weighting coefficients necessary to create the determination mask 5 are recorded. As the weighting coefficient, for example, a coefficient that satisfies the following relationship is set.

Coefficient a: Coefficient coefficient for power spectrum when steel cord is normally arranged b: Coefficient coefficient for power spectrum when steel cord interval is narrow c: Coefficient coefficient for power spectrum when steel cord interval is wide d: Steel cord Coefficient coefficient e for power spectrum in case of slanting: Weighting coefficient in case of crossing steel cords Coefficients are set so that a <b <c <d <e for the above coefficients To do.

As an example, a = 1, b = 10, C = 100, d = 1000, e = 10000, etc. are set. This coefficient is the coefficient a, b, c among the coefficients stored in the weighting coefficient storage unit 66 in the zero determination mask creating unit 67 that also indicates the degree of participation of the phenomenon in the life of the handrail. , D is used to create a determination mask 5 (procedures S1 to S2). As a specific example of the creation method of the determination mask 5, for example, when the image size of the two-dimensional FFT processed image is 256 × 256, the determination mask 5 has 256 × having 0 to 65535 (16 bits) as elements. For example, 256 two-dimensional arrays M (x, y) are prepared, and the coefficients are substituted into the elements of the two-dimensional array corresponding to the regions 51 to 55 of the two-dimensional array. The determination mask created as a result is a two-dimensional array having any one of the coefficients a, b, c, and d as an element.

  Next, the handrail deterioration diagnosis device 6 creates the determination mask 5 and then captures the X-ray transmission image 62 as image data by the CCD camera 63. (Step S3) In the two-dimensional FFT processing unit 64, the two-dimensional fast FFT is performed. Processing is performed (step S4). The image data is desirably acquired as an image having a number of pixels that facilitates two-dimensional FFT processing, for example, 256 × 256 pixels. In addition, for acquired images, two-dimensional window functions (Hanning window, Hamming window, etc.) are generated to prevent generation of a false spectrum due to FFT processing of a finite pixel image that occurs when the two-dimensional FFT processing image is directly implemented. It is desirable to implement the window function processing by

Next, the handrail deterioration diagnosis device 6 converts the two-dimensional FFT image created in the two-dimensional FFT processing unit 64 into a power spectrum image in the power spectrum calculation unit 65 (step S5). Further, the power spectrum calculation unit 65 may perform image density conversion, logarithmic conversion, and geometric conversion as necessary.

The deterioration degree determination unit 6 determines the deterioration degree of the portion of the handrail using the power spectrum image calculated by the power spectrum calculation unit 65 and the determination mask 5. Before the step of determining the deterioration level, the situation where the steel cords intersect is detected. Here, when the power spectra of both the regions 54 and 55 exceed a predetermined threshold value, it is determined that a crossing of the steel cords that greatly affects the life of the handrail has occurred, and the coefficient d The coefficient e is used instead of (steps S6 to S7).

Next, the deterioration degree is calculated. With this procedure, the situation where the crossing has occurred in the steel cord can be determined with the highest priority as the most deteriorated situation. Next, the deterioration degree determination unit 68 calculates the deterioration degree (step S8). As a specific calculation method, each pixel P (x, y) of the power spectrum image and each element M (x, y) of the two-dimensional array of the determination mask 5 are multiplied for all x and y, There is a method of integrating all multiplication results after multiplication. By this procedure, the situation where the crossing has occurred in the steel cord can be determined with the highest priority as the most deteriorated situation. Finally, the display device 69 displays the handrail deterioration status and life using the result of multiplication (step S9).

The display method of handrail deterioration status and life is classified as a method of displaying numerical values as the degree of deterioration and a predetermined threshold, and “normal”, “non-uniform distribution of steel cord”, “ There is a method of displaying “Steel code skew occurrence” and “Steel code crossing occurrence”.

  In the above embodiment, the procedure for determining the state of a part of the steel cord on the handrail has been described. However, as an extension of this embodiment, an embodiment for measuring the deterioration degree of the entire circumference of the handrail is provided. Can be mentioned. This embodiment can be realized by performing a two-dimensional FFT process in real time due to a remarkable improvement in the performance of a computer in recent years. As an embodiment, as shown in FIG. 5, in the handrail deterioration diagnosis device 6, after performing a procedure for creating a determination mask (procedures S <b> 1 to S <b> 2), the deterioration of the handrail at the relevant location from the acquisition of an X-ray transmission image. -Repeat the procedure for displaying the life (procedures S3 to S9) at high speed. In such an embodiment, when the handrail 9 is moved at an operating speed (30 m / min), as a result of the implementation, the deterioration status of each part of the handrail 9 can be obtained sequentially as the handrail 9 moves. It will be. By setting it as such embodiment, it becomes possible to confirm the deterioration condition of the handrail 9 over a perimeter, and it becomes possible to grasp | ascertain the deterioration condition of the handrail 9 in more detail eventually.

It is a figure which shows the example of the X-ray transmission image of the handrail of the diagnosis target in this invention, its two-dimensional Fourier-transform image, and the determination mask applied at the time of determination. It is the figure which showed an example of the structure of the apparatus for implementing this invention. It is the figure which showed an example of the structure of the handrail made into implementation object of this investigation. It is a figure which shows operation | movement of the handrail deterioration diagnostic apparatus in one Embodiment of this invention. It is a figure which shows operation | movement of the handrail deterioration diagnostic apparatus in other embodiment of this invention.

Explanation of symbols

1 X-ray transmission image of normal handrail 11 Two-dimensional FFT processed image of X-ray transmission image of normal handrail 2 X-ray transmission image of handrail with non-uniform steel cord spacing 21 Steel cord spacing is Two-dimensional FFT processed image of X-ray transmission image of handrail that became non-uniform 3 X-ray transmission image of handrail with skew steel cord 31 X-ray transmission image of handrail with skew steel cord 2D FFT processing image 4 Handrail crossing steel cord 41 2D FFT processing image of handrail crossing steel code 5 Judgment mask 51-55 Each area of judgment mask 6 Handrail deterioration diagnosis Device 7 X-ray source 8 X-ray 9 Hand rail 10 Steel cord of hand rail 61 X green visualization device (image) Intensifier)
62 Visualized X-ray transmission image 63 CCD camera 64 Two-dimensional FFT processing unit 65 Power spectrum calculation unit 66 Weighting coefficient storage unit 67 Determination mask creation unit 68 Degradation degree determination unit 69 Display device 90 Cosmetic rubber 91 Upper canvas 92, 93 Lower Canvas

Claims (3)

  1.   For an escalator handrail having a tensile body such as a metal inside, an X-ray generator for generating X-rays so as to pass through the handrail and an X-ray transmitted through the handrail as an image And an image processing device that determines a deterioration state of a handrail according to an X-ray transmission image obtained by the image input device, wherein the image processing device captures the hand imaged by the image processing device. A two-dimensional fast Fourier transform processing unit that performs a two-dimensional fast Fourier transform process on the X-ray transmission image of the rail, and the presence or absence of the tensile body of the handrail based on the processing result of the two-dimensional fast Fourier transform unit An escalator handrail diagnostic apparatus, comprising: an image determination unit for determination.
  2.   In the image processing device, the image determination unit is configured to weight a predetermined region of each power spectrum with respect to a power spectrum obtained by two-dimensional fast Fourier transform of the X-ray transmission image. The mask is applied, and the deterioration state of the handrail is determined using a total power spectrum of a portion corresponding to a predetermined region of the determination mask of the power spectrum and the weighting coefficient. The escalator handrail diagnostic device according to Item 1.
  3. 2. The image processing apparatus according to claim 1, wherein the image determination unit determines a state of non-uniform spacing, skewing, crossing, and the like of the tensile members in the hand rail as a deterioration state of the hand rail. The diagnostic apparatus of the escalator handrail of 1 or 2.
JP2003362252A 2003-10-22 2003-10-22 Diagnosing device for escalator handrail Pending JP2005126175A (en)

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
CN102107816A (en) * 2009-12-28 2011-06-29 株式会社日立建筑系统 Mobile armrest inspection device of passenger conveyer
JP2011140391A (en) * 2010-01-08 2011-07-21 Hitachi Building Systems Co Ltd Handrail inspection device for passenger conveyor
JP2011219244A (en) * 2010-04-13 2011-11-04 Hitachi Building Systems Co Ltd Deterioration diagnostic device for moving handrail of passenger conveyor
CN102234060A (en) * 2010-04-20 2011-11-09 株式会社日立建筑系统 Mobile armrest flaw detection device of passenger conveyer
CN102328871A (en) * 2010-07-12 2012-01-25 株式会社日立制作所 The handrail testing fixture of apparatus of passenger conveyor and the method for maintaining of apparatus of passenger conveyor
CN102756971A (en) * 2011-04-27 2012-10-31 株式会社日立建筑系统 Passenger conveyor armrest detection device and method, and program
JP2012220239A (en) * 2011-04-05 2012-11-12 Hitachi Ltd Apparatus and method for inspecting long member including steel cord to be used for transfer mechanism
JP2012218868A (en) * 2011-04-07 2012-11-12 Hitachi Building Systems Co Ltd Inspection method of passenger conveyor handrail
CN103241635A (en) * 2012-02-03 2013-08-14 株式会社日立建筑系统 Degradation diagnostic device for movable armrest
JP2013217712A (en) * 2012-04-05 2013-10-24 Yokohama Rubber Co Ltd:The Tire x-ray inspection determining method
JP2016088698A (en) * 2014-11-05 2016-05-23 株式会社日立ビルシステム Moving handrail deterioration diagnosing device
CN105911074A (en) * 2016-04-07 2016-08-31 山西大学 Calibration method for self-adaptive threshold in X-ray on-line detection of joint of wire-cored belt
CN107662871A (en) * 2016-07-29 2018-02-06 奥的斯电梯公司 Mobile handrail monitoring system, passenger transporter and its monitoring method for passenger transporter

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102107816A (en) * 2009-12-28 2011-06-29 株式会社日立建筑系统 Mobile armrest inspection device of passenger conveyer
JP2011136789A (en) * 2009-12-28 2011-07-14 Hitachi Building Systems Co Ltd Moving handrail inspection device of passenger conveyor
JP2011140391A (en) * 2010-01-08 2011-07-21 Hitachi Building Systems Co Ltd Handrail inspection device for passenger conveyor
CN102183531A (en) * 2010-01-08 2011-09-14 株式会社日立建筑系统 Handrail inspection device for passenger conveyor
JP2011219244A (en) * 2010-04-13 2011-11-04 Hitachi Building Systems Co Ltd Deterioration diagnostic device for moving handrail of passenger conveyor
CN102253060A (en) * 2010-04-13 2011-11-23 株式会社日立建筑系统 Deterioration diagnosis device for moving handrail of passenger conveyor
CN102234060A (en) * 2010-04-20 2011-11-09 株式会社日立建筑系统 Mobile armrest flaw detection device of passenger conveyer
JP2011225333A (en) * 2010-04-20 2011-11-10 Hitachi Building Systems Co Ltd Moving handrail defect detector of passenger conveyer
CN102328871A (en) * 2010-07-12 2012-01-25 株式会社日立制作所 The handrail testing fixture of apparatus of passenger conveyor and the method for maintaining of apparatus of passenger conveyor
JP2012020794A (en) * 2010-07-12 2012-02-02 Hitachi Building Systems Co Ltd Apparatus for inspecting hand rail for passenger conveyor, and method of maintaining the conveyor
CN102328871B (en) * 2010-07-12 2014-06-25 株式会社日立制作所 Handrail detection device of passenger transferring apparatus and maintaining method of passenger transferring apparatus
JP2012220239A (en) * 2011-04-05 2012-11-12 Hitachi Ltd Apparatus and method for inspecting long member including steel cord to be used for transfer mechanism
JP2012218868A (en) * 2011-04-07 2012-11-12 Hitachi Building Systems Co Ltd Inspection method of passenger conveyor handrail
JP2012229109A (en) * 2011-04-27 2012-11-22 Hitachi Building Systems Co Ltd Device, method, and program for inspecting passenger conveyor handrail
CN102756971A (en) * 2011-04-27 2012-10-31 株式会社日立建筑系统 Passenger conveyor armrest detection device and method, and program
CN103241635A (en) * 2012-02-03 2013-08-14 株式会社日立建筑系统 Degradation diagnostic device for movable armrest
JP2013217712A (en) * 2012-04-05 2013-10-24 Yokohama Rubber Co Ltd:The Tire x-ray inspection determining method
JP2016088698A (en) * 2014-11-05 2016-05-23 株式会社日立ビルシステム Moving handrail deterioration diagnosing device
CN105911074A (en) * 2016-04-07 2016-08-31 山西大学 Calibration method for self-adaptive threshold in X-ray on-line detection of joint of wire-cored belt
CN105911074B (en) * 2016-04-07 2018-08-24 山西大学 Adaptive threshold scaling method in wire-core belt lacings X-ray on-line checking
CN107662871A (en) * 2016-07-29 2018-02-06 奥的斯电梯公司 Mobile handrail monitoring system, passenger transporter and its monitoring method for passenger transporter
EP3279132A1 (en) * 2016-07-29 2018-02-07 Otis Elevator Company System of monitoring handrail for a passenger conveyer device, a passenger conveyer device and monitoring method thereof
US10173864B2 (en) 2016-07-29 2019-01-08 Otis Elevator Company System of monitoring handrail for a passenger conveyer device, a passenger conveyer device and monitoring method thereof
US10221046B2 (en) 2016-07-29 2019-03-05 Otis Elevator Company System of monitoring handrail for a passenger conveyer device, a passenger conveyer device and monitoring method thereof

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