WO1997044958A1 - Appareil d'observation de la surface des parois d'un forage - Google Patents

Appareil d'observation de la surface des parois d'un forage Download PDF

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Publication number
WO1997044958A1
WO1997044958A1 PCT/JP1997/001719 JP9701719W WO9744958A1 WO 1997044958 A1 WO1997044958 A1 WO 1997044958A1 JP 9701719 W JP9701719 W JP 9701719W WO 9744958 A1 WO9744958 A1 WO 9744958A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
image data
wall surface
data
memory
Prior art date
Application number
PCT/JP1997/001719
Other languages
English (en)
Japanese (ja)
Inventor
Yoshitaka Matsumoto
Osamu Murakami
Original Assignee
Core Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Core Corp. filed Critical Core Corp.
Priority to AU27915/97A priority Critical patent/AU715836B2/en
Priority to CA002255820A priority patent/CA2255820A1/fr
Publication of WO1997044958A1 publication Critical patent/WO1997044958A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Definitions

  • the present invention relates to an apparatus for observing a hole wall surface, such as a borehole or a sewer pipe, which captures the wall surface of an underground hole and develops the image into an entire circumference image.
  • the hole wall surface observation device of the present invention performs a high-speed coordinate transformation when photographing a hole wall surface such as a borehole or a sewer pipe and developing the image into an omnidirectional image, so that the developed image around the hole wall surface can be obtained only with a still image.
  • the purpose of this is to make it easier to recognize and recognize the situation inside a moving hole such as water leakage by displaying it in a moving image. Disclosure of the invention
  • the configuration of the present invention is as follows.
  • An illumination device that illuminates the entire circumferential direction of the hole wall surface
  • a video camera that includes wide-angle imaging means and captures an image of the entire circumference of the hole wall surface illuminated by the lighting device from one viewpoint at a time, An azimuth meter that detects the direction of the video camera and outputs azimuth data of the captured image; Storage means;
  • Image data reading means for reading the entire circumference image data stored in the image memory with reference to the azimuth data in a spiral for each field;
  • Image data developing means for converting all-around image data read from the image memory with reference to a coordinate conversion table into expanded image data for each field;
  • Moving image display means for performing DZA conversion on the expanded image data for each field and outputting a video signal of a moving image
  • FIG. 1 is a configuration diagram of a hole wall surface observation device of the present invention.
  • FIG. 2 is an internal configuration diagram of the probe.
  • FIG. 3 is an example of a captured image of a hole wall surface.
  • FIG. 4 is a schematic projection view of a convex conical mirror.
  • FIG. 5 is a schematic diagram of photographing of a wide-angle lens.
  • FIG. 6 is a block diagram of the processing device.
  • FIG. 7 is a schematic diagram of digitized image data.
  • FIG. 8 is an interlaced scanning line diagram.
  • FIG. 9 is a schematic diagram of a developed image around the hole wall surface.
  • FIG. 1 shows a configuration diagram of a hole wall surface observation device embodying the present invention.
  • the hole wall observation device consists of a probe 1 that observes the hole wall surface, a wire 2 that suspends the probe 1, a winch 3 that pulls the wire 2, and moves the probe 1 up and down.
  • Cable 4 for transmitting observation data 1)
  • Processing unit 5 for inputting observation data of probe 1 for image processing
  • Display unit 6 for displaying the image processing result of processing unit 5 on the TV screen
  • Processing unit And a storage device 7 for storing image processing results.
  • FIG. 2 shows an internal configuration diagram of the probe 1.
  • the probe 1 is composed of a video camera 1 1 that captures an image of the entire circumference of the submerged wall, a control device 12 that is connected to the video camera 11 and controls the video camera 1], and a video camera 11 A compass 13 that detects the direction of 1 and outputs the orientation data of the captured image, an illumination lamp 14 that is attached to the outer periphery of the video camera 11 and illuminates the entire circumference of the hole wall, and a video camera It is composed of a convex circular mirror 15 as a wide-angle photographing means, which is arranged in front of the optical axis 1 and projects the entire peripheral image of the hole wall surface irradiated by the illumination lamp 14 on a mirror surface.
  • the probe wall observation device of the present invention inserts the probe 1 into the hole and illuminates the entire circumference of the hole wall with the illumination lamp 14.
  • a indicates a diagonal crack formed on the hole wall
  • b indicates a horizontal crack
  • c indicates a vertical crack.
  • FIG. 4 shows a schematic projection view of the convex conical mirror 15.
  • the convex conical mirror 15 is trapezoidal when viewed from the side, and its mirror surface is inclined by 45 °, and the light reflected on the mirror surface of the convex conical mirror 15 turns 90 ° and converges on the lens surface of the video camera 11.
  • the video camera 11 can take an image of the entire circumference of the hole wall in the range r in the figure at once from one viewpoint.
  • FIG. 6 shows a block diagram of the processing device 5 for processing the observation data of the probe 1.
  • the processing device 5 decomposes the video signal of the video camera 11 into R, G, and B signals by an RGB decoder 51, and converts it into digital image data by an AZD converter 52.
  • the digitized image data is stored in the image memory 54 for each frame by the write memory data controller 53 as a collection of pixels as shown in FIG.
  • a screen composed of 262.5 lines is transmitted 60 frames per second, and the second image scanning line is swept between the scanning lines of the first image. (Interlaced scanning).
  • FIG. 8 shows a scanning diagram of this interlaced system.
  • the interlaced method displays a screen (one frame) with 525 scanning lines by combining two fields, an odd field shown on the left side of the figure and an even field shown on the right side.
  • this method draws 22.5 lines in the first 1/60 seconds, 22.5 lines in the next 1Z60 seconds, and completes 52.5 lines in these two times Screen.
  • the contents of the image memory 54 are read out by the readout memory address controller 55 at a rate of 6 times per second in accordance with the vertical and horizontal synchronization signals for each field.
  • the data of the odd field and the even field are alternately read many times at a speed of 0 times.
  • the reading of the image memory 54 is performed before the next frame updates the previous frame, that is, every 1/30 second per cycle.
  • the image data is spirally read out under the control of the coordinate conversion table 56 while referring to the azimuth data of the captured image output from the compass 13.
  • the reason why the image data is read in a spiral shape is that the scanning line on the TV screen is inclined as shown in FIG. 813 ⁇ 4.
  • the image data By reading out the image data according to the inclination of the scanning line, it is displayed on the TV screen. To correct the misalignment when displaying, and display a high-fidelity screen.
  • the image of the hole wall surface read in a spiral shape becomes a trapezoidal figure due to the difference between the inner and outer circumferences, and is corrected by the coordinate conversion table 56 performed simultaneously with the reading of the image data. Convert to and expand.
  • the image data developed into the rectangular figure is converted into an analog signal by the D / A converter 57, and the video signal is output through the RGB matrix circuit 58.
  • the position of the convex circular mirror 15 also changes every moment. Therefore, when the entire circumference image of the hole wall reflected on the mirror surface of the convex conical mirror 15 captured by the video camera 11 is processed at high speed and coordinate-transformed for each frame, the result is that the continuous hole wall The entire circumference developed image is displayed as a moving image.
  • the moving distance of the video camera 11 is measured by a rotary encoder (not shown) attached to the winch 3, and the pulse generated by the rotary encoder is used as a trigger to write.
  • the image data 54 is controlled by the memory data controller 53, The image data is written to the image memory 54 and stored.
  • the image memory 54 stores all image data to be taken while moving the video camera 11 at a distance equal to the distance between both eyes. For example, when the distance between both eyes is 65 mm, one frame of image data is stored every time the video camera 11 moves 1 mm, and at least 65 frames of image data are stored at a time.
  • the write memory data controller 53 stores images stored in the image memory 54 at once.
  • the image memory 54 is controlled so that the image data newly stored is added to the oldest image data every time the video camera 11 moves while the number of image data is kept constant.
  • the position interval between the newly added image data and the oldest image data is always equal to the binocular interval.
  • the image data stored in the image memory 54 is stored in the image memory 54 by the memory address controller 55 in accordance with the vertical and horizontal synchronizing signals for each field in the same manner as in the previous embodiment.
  • the data of the odd and even fields are alternately read many times at a rate of 60 times per second.
  • the reading of the image memory 54 is performed by alternately switching the read address, assembling the image data to be newly added and the oldest image data, and reading them alternately in a time-division manner.
  • the interval between the binocular parallaxes can be arbitrarily adjusted by changing the readout address of the left and right image data to be combined.
  • the two images, the newest image and the oldest image in the image memory 54, are rotated 90 degrees each and turned sideways. Then, right and left parallax images are obtained.
  • the stereoscopic image reproduces a space with depth before and after the display surface by separately presenting two 2D images with binocular disparity to the left and right eyes.
  • left and right parallax images are simultaneously presented on a CRT for the left and right eyes or a liquid crystal display to display a stereoscopic image.
  • a stereoscopic image can be stereoscopically viewed even if the left and right parallax images are not completely simultaneous and have a time delay of about 10 Omsec or less.
  • 60 images are presented per second, so each image is presented approximately every 16.7 msec. Therefore, the left and right parallax images are alternately displayed on a single TV screen in a time-sharing manner, and the stereoscopic vision is made possible by observing the TV screen with shutter glasses that alternately open and close the left and right eyes. Become.
  • the left and right sides displayed on one TV screen using complementary colored glasses or polarized glasses may be separately presented.
  • the hole wall surface observation device of the present invention performs high-speed coordinate conversion when photographing a hole wall surface such as a boring hole or groundwater and developing the image into a full-circumference image, so that not only a still image but also a moving image Display as an image.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Image Processing (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'appareil faisant l'objet de cette invention sert à afficher une image à développement panoramique d'une surface des parois d'un forage, non seulement par une image fixe mais également par une image dynamique, en effectuant une transformation de coordonnées à vitesse élevée, lorsque la surface de la paroi d'un trou pratiqué par forage ou d'un trou à travers lequel s'écoule de l'eau souterraine est photographiée et ensuite développée en une image panoramique. Les données d'images numérisées sont stockées dans chaque bloc d'une mémoire d'images au moyen d'un contrôleur de données de mémoire, et les données des zones à nombre impair et des zones à nombre pair de la mémoire d'images sont extraites en alternance de nombreuses fois à une vitesse de 60 zones par seconde, au moyen d'un contrôleur d'adresses de mémoire de lecture, en fonction de signaux de synchronisation verticale et horizontale. Pendant ce temps, les données d'images sont lues en spirale par commande d'une table de transformation de coordonnées avec référence aux données directionnelles de l'image photographiée émises par un indicateur de direction. Les données d'images développées en un diagramme carré sont converties en signaux analogiques par un convertisseur N/A, et les signaux de la représentation en images obtenue sont émis par un circuit matriciel RVB.
PCT/JP1997/001719 1996-05-23 1997-05-22 Appareil d'observation de la surface des parois d'un forage WO1997044958A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU27915/97A AU715836B2 (en) 1996-05-23 1997-05-22 Hole wall surface observing apparatus
CA002255820A CA2255820A1 (fr) 1996-05-23 1997-05-22 Appareil d'observation de la surface des parois d'un forage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8/151650 1996-05-23
JP15165096A JPH09312835A (ja) 1996-05-23 1996-05-23 孔壁面観測装置

Publications (1)

Publication Number Publication Date
WO1997044958A1 true WO1997044958A1 (fr) 1997-11-27

Family

ID=15523214

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/001719 WO1997044958A1 (fr) 1996-05-23 1997-05-22 Appareil d'observation de la surface des parois d'un forage

Country Status (4)

Country Link
JP (1) JPH09312835A (fr)
AU (1) AU715836B2 (fr)
CA (1) CA2255820A1 (fr)
WO (1) WO1997044958A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3728535B2 (ja) * 2003-07-17 2005-12-21 関西電力株式会社 管内欠陥寸法測定システム及び方法
JP5264623B2 (ja) * 2009-06-05 2013-08-14 日鐵住金建材株式会社 立坑内壁調査用計測器の固定装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62198272A (ja) * 1986-02-26 1987-09-01 Central Res Inst Of Electric Power Ind ボアホ−ルテレビカメラ装置
JPH04368594A (ja) * 1991-06-17 1992-12-21 Nichiboo:Kk ボアホ−ル内壁等の撮像装置
JPH06292204A (ja) * 1993-04-05 1994-10-18 Electric Power Dev Co Ltd ボアホールテレビカメラ装置の影像処理方式

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62198272A (ja) * 1986-02-26 1987-09-01 Central Res Inst Of Electric Power Ind ボアホ−ルテレビカメラ装置
JPH04368594A (ja) * 1991-06-17 1992-12-21 Nichiboo:Kk ボアホ−ル内壁等の撮像装置
JPH06292204A (ja) * 1993-04-05 1994-10-18 Electric Power Dev Co Ltd ボアホールテレビカメラ装置の影像処理方式

Also Published As

Publication number Publication date
CA2255820A1 (fr) 1997-11-27
JPH09312835A (ja) 1997-12-02
AU2791597A (en) 1997-12-09
AU715836B2 (en) 2000-02-10

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