DE9003086U1 - Camera for well inspection - Google Patents

Description

ti in

Camera for well inspection

The subject of this innovation is a camera for well inspection, whereby both the well wall and the well bottom can be captured from a specific viewing angle.

The camera is designed for the inspection of wells with a minimum internal diameter of about 100 mm up to a diameter of 100 mm* (see example 3) at any depth.

The purpose of this innovation is to _inspect the well wall in any area and depth, all around, over a viewing angle of 360°. Cameras for inspecting the well wall are already available, whereby the well wall can be observed with a viewing angle of 360° using a single camera and a mirror arrangement; a mirror is aimed at the well wall at an angle and the camera looks at this mirror at an angle, so that an image of the well wall is projected into the camera via this mirror. The mirror is rotated by an electric motor, so that according to the rotation of the mirror, any section of the well wall can be viewed over a viewing angle of 360°.

The disadvantage of this device is that the mirror deflection results in a significant loss of light and the channel wall can only be made visible as a mirror image. In addition, there is a high loss of light in the beam between the camera lens and the rotating mirror because this light path is in the cloudy and damp well atmosphere.

III ■· · ···

It» >»■» ··

11111 11 ·■ · · ·

-4-

It is also known* to use a so-called fisheye camera, which however has the disadvantage that the well wall cannot be

f is shown to scale, but that it

j sideline distortions. Sk ■· The present innovation is therefore

The aim is to further develop a camera of the type mentioned above in such a way that a true-to-scale image of the well wall is possible with considerably less effort than with previously known cameras.

To solve the task, the innovation is thereby \ characterized in that two cameras are arranged in front, wherein a first camera

] with a wide-angle lens down towards the bottom of the well

§ while a second camera at an angle to this in radial

I looking directly at the well wall, with the second camera

> is rotationally connected to the first and is rotationally driven.

K With the given technical teaching, the essential advantage

ji achieved that with the vertically downward facing camera with the

p Wide-angle lens first a rough inspection of the well wall

I can take place to detect major errors. If such a I error detected, then from the first camera image to dds second

% switched and the camera looking in radial direction now turns into

opposite position to the fault in the well wall \. and turned and adjusted accordingly. The error can now be determined exactly with

the radially looking camera can be detected and recorded.

Both cameras, but preferably the second, radially looking camera, can be equipped with a zoom to provide even better fault localization.

The images from both cameras can be displayed on two different monitors, or the images are displayed with a Switch and alternately display on a single monitor to ■$

i reported. ·&idigr;

It is also important that each camera is assigned correspondingly aligned lighting spotlights. This means that the first camera is assigned spotlights that point vertically downwards and illuminate the well wall at an angle, while the radial camera is assigned spotlights that shine directly onto the well wall.

With this innovation, different types of cameras can be used. Both film cameras and corresponding television or video cameras are possible. Such cameras can transmit either black and white images or color images.

The drawing is described in more detail below.

The drawing and its description show further advantages and features of the innovation.

Show it:

Figure 1 shows a schematic side view of the device for Well wall inspection, consisting of two cameras;

Figure 2 is a side view of the arrangement according to Figure 1 in the direction of arrow II.

There is a camera 1 looking vertically downwards, which consists of a CCD arrangement, with the CCD module in

• I · ft · ·

ti I · · · ·

'ft # t · 4

II I * · ·

-6-

Figure 1 is arranged directly behind the lens 3. Furthermore, another camera 5 is arranged in the same housing 4, which looks with its lens 6 at the well wall in the radial direction.

In the housing 4 there is a glass pane 7 through which the lens 6 looks at the well wall (not shown in detail).

The front glass pane 8 associated with the camera 1 is shown in Figure 2.

Each camera is assigned servo motors 9,10 for adjusting the aperture and focusing, whereby the servo motors 9,10 have only been shown for camera 5 for the sake of simplicity, while camera 1 has the same servo motors 9,10.

The entire arrangement is arranged in a watertight manner in the evacuated housing 4.

The evacuation of the housing 4 is not necessary for the solution, it is only carried out for safety reasons in order to avoid fogging of the objective and other optical parts in the housing 4.

The lens 6 of the camera 5 can be designed as a zoom lens.

For the sake of simplicity, no illumination headlights are shown in Figure 1. Their arrangement can be seen in Figure 2 together with further details.

Figure 2 shows the side view of Figure 1 in the direction of arrow II in Figure 1.

It can be seen that the lens 3 is arranged behind the glass pane 8 on the front. This time, Figure 2 shows the servo motors 9, 10 for adjusting the lens 3 of the camera 1.

Headlights (not shown in detail) are screwed into the front holes 11, which shine vertically downwards into the well shaft.

For design reasons, not only is the radial camera 5 arranged to be radially rotatable, but the camera 1 arranged at the front is also axially rotatable.

Ball bearings 12 are arranged at the upper and lower ends of the housing 4, which allow the entire arrangement to rotate axially. The axial rotation is achieved by a motor 13, which drives an axle 15 via a pinion 14, with the pinion 14 meshing with external teeth on the main axle 15.

The main axis 15 is connected in a rotationally fixed manner to the rotating part of the camera i. This rotating part is referred to as block 16, whereby the main axis 15 is connected to this block via the screw 17. The entire electronics of the device, consisting of control electronics and image evaluation electronics, are arranged in a rotating compartment 18.

The image evaluation electronics can be arranged partially for one or for both cameras. If only ^a single image evaluation electronic is arranged, the image from one camera is switched to the other.

In the other case, if two image evaluation electronics parts are present

-O-

are, the video signal is switched to the monitor accordingly.pt.

The camera signals are transmitted via slip rings to slip ring bodies 21, which are connected to the connection pins of a connector 19 via corresponding signal paths or wiring.

Here, an axle 22 is connected to the housing 4 in a rotationally fixed manner, whereby the connection is made via a gasket nut 23, which firmly connects the axle 22 to the housing 4 via the gasket nut 23 and in this case a clamping takes place in the block 16.

This fixes the slip rings 20. The axis 22 therefore rotates with the internally arranged rotatable housing.

The camera 5 is firmly connected to the inner, rotating block 16. At the height of the camera 5, a surrounding glass pane 7 is integrated into the housing, which is designed as a glass cylinder. It is important that the glass cylinder is attached to the housing via glued sleeves 24, whereby the sleeves 24 create an optical separation of the glass cylinder 7 from the other glass panes of the housing in order to prevent impermissible light transmission from headlights to the lens.

In detail:

A first headlight 25 is arranged in the upper part of the housing and consists of several radially arranged lamps, which are arranged in a certain diameter range in the area of the headlight glass 25. The headlight 25 is also designed as a solid cylinder.

-9-

The lamps 26 are only mounted in the area of the lens. The lamps rotate with the entire block 16.

The same arrangement is located on the lower part of the housing 4, where a headlight arrangement 27 with lamps 26 assigned in the same way is also present.

Both headlights rotate with the camera 5 and illuminate the well wall in a concentrated radial direction from both sides of the lens.

As already mentioned at the beginning, the headlights arranged at the front are screwed into the holes 11.

Not shown in detail are three tension rods evenly distributed radially around the circumference, which rest on the outside of the housing and pull the housing together in the axial direction.

This holds the sleeves 24 together in a pressure-tight manner, so that an overall watertight and airtight assembly is produced.

With the camera described, a high-quality television image of both the well wall and the well bottom is achieved with relatively little construction effort, with the vertically downward-looking camera also capturing the well wall in a larger area via its wide-angle lens.

It is important that the entire rotating arrangement inside the housing 4 can be rotated endlessly, i.e. it can be rotated continuously forwards and backwards and at any angle, even by a multiple of 360°.

ic cccc ·· ·-*>· ·

il lit· * · ·

C . ΢. - Ci « C ·· · ■>

-10-

Through the slip ring arrangement described, all signals are coupled out and fed in.

Because the housing 4 is self-contained and compact, it is possible to inspect even the narrowest well shafts with this camera, down to a minimum diameter of 10 cm.

l · &ogr; Il · ····

4 &ogr;'■&igr;&bgr; a &igr; · « · ·

&lgr; .j : a 'j a ■· « e · · ·

c j '- j »&igr; · · e ·

drawing-legi:nde

1 camera

2 CCD module

3 Lens £ Body

6 Lens

7 Glass pane ' cylinder

8th "

9 Servo motor

10 "

11 bore

12 ball bearings

13 Engine

14 pinions

15 Main axis

16 blocks

17 Screw

18 compartment

19 plugs

20 slip rings

21 Slip ring body

22 Axis

23 Gill nut

24 sockets

25 headlights

26 lamps

27 headlights

Claims (5)

PATENT ATTORNEY DR.-ING. PETER RgEBLINGT ^: -. ^: Dipl.-Ing.
EUROPEAN RATING ATTORNEY Our characters / our ret.: J-354-36 Please repeat in the answer D-8990 Lindau {Lake Constance) Rennerle 10 ■ Posttedi 3*50 YourZetchen ;n Message from Date Yburletteror Date 5 September 1990 Official AZ: G 90 03 086.9
Applicant: JT-Elektronik GmbH Protection claims 1. Case for well inspection, whereby both the well wall and the well bottom can be captured from a certain angle of view, characterized in that two cases (1,5) which can be lowered into the well shaft are present and are arranged in such a way that a first case (1) equipped with a wide-angle lens (3) is directed downwards towards the well bottom and a second case (5) at an angle to it in a radial direction directly towards the well, whereby both cases (1,5) are arranged in a block (16) which is rotatably mounted in a housing (4) about the longitudinal axis and the second case (5) is rotatably connected to the first case (1) and is itself driven in rotation in this block (16). 2. Casera according to claim 1, characterized in that each of these caseras (1, 5) has correspondingly aligned lighting spotlights associated therewith, whereby the first casera (1) has spotlights directed vertically downwards towards the base and obliquely towards the well wall and the second has spotlights directed radially Telex. f acstmtle / Telefax Bank accounts"Pc,n'*> nnckkonfo 5 43 71 !»,dient-d) »49-8382-7 80 27 Bayer VeiP'rnbank Lindau IBI No. 1257 HO(BIJ? 735 200 74| M0rch»n4M84e -Wi Telegram address ■·_ _·■_ ■· .... HyD..iB»nk l.«l<aulB|Nr Vi 70-32B &Pgr;4.1 IBLZ 733 2(M 4?) IBLiT 700 10080) paln hndau · · · >'·"..'/olisrjM*'liiia'i (HlNr 51 ???. 000IBI / 7&Lgr;&Iacgr; 901 20) Camera (5) is assigned to the direct illumination of headlights (25, 27). 3. Camera according to claim 1, characterized in that the wall of the housing (4) has glass panes in front of the headlights (25, 27) and glass panes (7.8) are arranged in front of the lenses (3, 6), the glass panes (7) in the housing wall being cylindrical and divided into sections for the headlights (25, 27) and the lens (6), the individual sections being connected to one another by means of sleeves (24). 4. Camera according to claim 1, characterized in that the block (16) with the cameras (1, 5) is rotatably mounted in ball bearings (12) inside the housing (4), whereby a motor (13) mounted outside the block (16) drives the block (16) inside the housing (4) via a pinion (14). 5. Camera according to claim 1, characterized in that the block (16) rotatably mounted in the housing (4) has a compartment (18) in which the camera evaluation electronics are housed, the signals of which are transmitted outwardly via slip rings (20) arranged on an axis (22) and a slip ring body (21) to a fixed block with a plug arrangement (19).