JP2011119986A - Camera apparatus for well - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera apparatus which allows omnidirectional photographing for a well pipe installed inside a well. <P>SOLUTION: A device is constituted by: installing side-view cameras 5 with fish-eye lenses at parts in four directions in the vertical direction of a circumferential side part of a camera installation member 2 provided with a direct vision camera 6 at the lowermost end; providing the surroundings of the respective side-view cameras and the direct vision camera with LED illumination parts; installing a four division unit and a camera controller connected to the direct vision camera and the side-view cameras at a camera housing part 3 connected to the camera installation member constituted in this way; and establishing connection from a connector 4 connected to the camera housing to a terrestrial TV monitor via a camera cable. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a well camera device that enables omnidirectional imaging of a well pipe installed inside a well.

  As means for installing a well pipe in a well ranging from 300 to 500 m and monitoring and photographing the situation inside the well pipe, there are conventionally known techniques as follows.

Japanese Patent Laid-Open No. 6-314001 JP 2002-64729 A JP 2004-357111 A Japanese Patent No. 2724833 Japanese Patent No. 3447282 JP 2003-244511 A Japanese Patent No. 2697102

  Of these, all of the techniques found in 1, 2, and 3 employ a means that uses mirror reflection as a method of photographing the entire periphery of the well.

  The technique shown in Fig. 4 is a combination of a rotating mirror and a TV camera on the upper part thereof as means for photographing the entire periphery of the well.

  5 shows a technique in which the camera unit photographs the entire circumference of the well as the mirror unit rotates.

  The technology seen in 6 and 7 is a photographic camera that covers all directions, but is installed on the ground and used.

  However, the shortcomings of these conventional camera technologies can be summarized as follows.

  First, since there is one side-viewing lens intended to observe the inner wall situation of the well pipe, the lens portion must be rotated.

  Secondly, because the observation is taken in a special environment in the well, the side view must be observed while rotating or lowering the inside of the well while rotating, and the observation field of view is a spiral in the vertical direction. There was a blind spot.

  Thirdly, in order to observe so as not to cause a blind spot, it is necessary to repeat one rotation without descending or ascending, and then descending or ascending to the next field of view and rotating again. It was a very unrealistic task.

  Fourthly, when the blind spot as described above occurs, there is a risk of overlooking the state of damage to the well.

  Therefore, as a means for solving the above-described drawbacks, the present invention has taken note of the following points.

  First, the inner wall of the well pipe can be observed over all directions of 360 °.

  Secondly, four fisheye lenses having a field of view of 110 ° are arranged in the vertical direction so that the fields of view of the four lenses overlap each other by 20 ° to eliminate the blind spots.

  The present invention is only installed in a well constructed in a well, and the entire circumference of the well is monitored and inspected over the entire surface of 360 ° so that it can be reliably observed in all directions without overlooking the state of deposits and breakage of the well. An object of the present invention is to provide a field-of-view monitoring camera device that can shoot and record in all directions.

  In the present invention, a side-view camera with a fisheye lens is installed at four positions in the longitudinal direction of a peripheral side surface portion of a camera installation member provided with a direct-view camera at the lowermost end, and LED lighting is provided around each of the side-view cameras and the direct-view camera. In the camera housing portion connected to the camera installation member having such a configuration, the quadrant unit and the camera controller communicating with the direct view camera and the side view camera are installed, and the camera is connected to the camera housing from the connector. It is a device that communicates with a TV monitor on the ground via a cable.

  Causes of abnormalities in the wells in operation, water turbidity, sand, and water level dropping or rising are often caused by clogging or breakage of well pipe screens. In view of the fact that maintenance is indispensable, the device according to the present invention enables a person to quickly and surely detect and detect anomalies by monitoring the state of a well pipe on the ground on a TV monitor, It is an extremely practical device.

Illustration of the entire device Front view of the underwater camera installation section Fig. 2 Front view of the main part The bottom view of the principal part seen from the 3A-A line Circuit diagram inside the underwater camera installation

  In the present invention, in the camera installation member, the underwater TV camera has a 110 ° wide-angle fisheye lens installed in four directions, and each lens has a 20 ° overlap portion with an adjacent lens. The entire inside of the tube can be imaged at 360 °, and the state is displayed in an image divided into four on the ground, so the supervisor can grasp the state of the well pipe on the ground in real time. .

  Further, by using an LED light as illumination around the camera, clearer shooting can be performed.

  Furthermore, the shooting record can be stored as a moving image, and the developed image of the entire inner peripheral surface of the well can be inspected by processing with dedicated software.

  In addition, when an abnormal part is found from an image displayed on a ground monitor, detailed confirmation can be performed reliably by switching the image.

  Similarly, switching between direct view and side view of the TV camera can be easily performed on the ground.

  Note that the displacement of the arrangement difference of 44 mm, which occurs when the fisheye lens with a field of view of 110 ° is arranged in all directions in the vertical direction to correct the entire peripheral field of view, is corrected by the separately invented image analysis software, and the peripheral surface is projected as the same depth image. ing.

  Reference numeral 1 denotes an underwater TV camera unit having a cylindrical shape according to the present invention, which is called an abbreviated MVP (Multi View Point) camera.

  The MVP camera includes a camera installation member 2 that can rotate 360 °, a camera housing 3 that is slidably fitted on the upper portion thereof, and a connector 4.

  5 is a side-view camera with a fish-eye lens that is installed in the vertical direction at equal intervals in four directions on the peripheral side surface of the camera installation member 2, and the lens of each side-view camera has a wide angle of 110 °. Therefore, they overlap each other by 20 °, so that no blind spots are generated in photographing the entire 360 ° circumferential surface portion of the well.

  Reference numeral 6 denotes a direct-view camera provided at the lowermost end of the camera installation member 2 and is used for confirming the state inside the well pipe from above in the descending MVP camera unit.

  Reference numerals 7... Denote LED illumination units provided around the respective side-view cameras 5.

  Reference numeral 8 denotes a camera controller provided inside the camera installation member 2, which communicates with the direct view camera 6.

  Reference numeral 9 denotes a quadrant unit that communicates with each of the side-view cameras 5..., Which communicates with a camera controller 10 described later.

  A camera controller 10 communicates with the direct-view camera 6, which communicates with the multiplexing unit 11.

  Reference numeral 12 denotes a DC-DC converter that communicates with the LED illumination unit 7..., Which communicates with the multiplexing unit 11.

  A pan motor 13 communicates with the camera controller 10.

  A slip ring 14 communicates with the multiplex unit 11 and communicates with the connector 4.

  Reference numeral 15 denotes a center riser installed between the base end member 16 of the connector 4 and a part of the camera housing 3, and the outer side surface of the center riser slides up and down while contacting the inner wall surface of the well a. 3 moves up and down on the connector 4.

  Reference numeral 17 denotes a camera cable that communicates from the base end member 16 of the connector to the inside of the connector 4 and from the inside of the camera housing 3 to each of the camera units 5 and 6. The winch 20 is connected to the TV monitor 23 via the camera cable 21 and the camera controller 22.

  A cable counter sensor cable 24 is connected between the camera controller 22 and the upper sheave 18.

  Reference numeral 25 denotes a remote controller for the electric winch 20, and a power cable 26 is further connected to the electric winch.

  Reference numeral 27 denotes a power cable to the camera controller 22.

DESCRIPTION OF SYMBOLS 1 Underwater TV camera part 2 Camera installation member 3 Camera housing 4 Connector 5 ... Side view camera 6 Direct view camera 7 ... LED illumination part 8 Camera controller 9 Quadrant unit 10 Camera controller 11 Multiplex unit 12 DC-DC converter 13 pan motor 14 slip ring 15 center riser 16 base end member 17 camera cable 18 sheave 19 intermediate sheave 20 electric winch 21 camera cable 22 camera controller 23 TV monitor 24 cable counter sensor cable 25 winch remote control 26 power cable 27 power cable

Claims (1)

A side-view camera with a fish-eye lens is installed at four longitudinal locations on the peripheral side surface of the camera installation member provided with a direct-view camera at the lowest end, and an LED illumination unit is provided around each of the side-view cameras and the direct-view camera. In the camera housing portion connected to the camera installation member having such a configuration, a quadrant unit and a camera controller that communicate with the direct view camera and the side view camera are installed, and a connector that is connected to the camera housing is connected via a camera cable. A well camera device characterized by being connected to a ground TV monitor.

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