JPS6161592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile visual inspection device, and more particularly to a mobile visual inspection device that moves and visually monitors a place in high temperature, air, where piping and the like are complicated.

As a conventionally developed mobile viewing device, there is one in which a television camera is mounted on a moving body that travels on a track such as a guide rail by remote control.
This involves transmitting images captured by a television camera to a console outside orbit via a signal cable, playing them back on a monitor on the console, and remotely controlling the mobile object from the console. Visual monitoring of any location visible from the running track can be performed while sitting at the console. However, if the traveling route of the moving object is in hot air, it is necessary to install a cooling device on the moving object to cool the TV camera body, which increases the size and weight of the moving object. Become. This has the disadvantage that it imposes a large restriction on the selection of a travel route for a moving object in a high temperature, airy atmosphere with a complicated arrangement of piping and the like.

As a method to compensate for this drawback, the TV camera is installed outside the moving object and an image guide using optical fiber is used to transmit images from the moving object to the TV camera, thereby reducing the size of the moving object. There is something I lost. The image guide has both ends connected to an optical system and a television camera inside the moving body, and a part of the image guide is wound around a cable reel located outside the orbit. When the movable body moves, the cable reel rotates in response to changes in the distance between the movable body and the television camera, and the image guide is smoothly fed out and wound up. However, as the cable reel rotates, the end of the image guide rotates, and the image captured by the optical system inside the moving object rotates on the imaging surface of the television camera, making visual monitoring difficult. Was.

An object of the present invention is to provide a video transmission system in which video transmitted from a moving object to a television camera is not affected by the rotation of a cable reel.

In the present invention, the television camera body is rotated in synchronization with the cable reel so that the image transmitted from the moving body to the television camera via the image guide does not rotate due to the rotation of the cable reel.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a remote viewing device, and first, the overall operation will be briefly explained.

The movable body 1 is suspended from a trolley chain 7 built in a guide rail 2 via a hanger 12. The trolley chain 7 is meshed with a sprocket 9 of a chain drive mechanism 8. Therefore, the movable body 1 is towed by the trolley chain 7 that is moved by the drive mechanism 11, and travels on the guide rail 2 as a track. Mechanically, the trajectory in this case is an endless trajectory drawn in one stroke. Cable clamps 3 are connected to the trolley chain 7 at equal intervals. And image guide 4 is
It is wound around a cable reel 5 installed outside the orbit, and its winding and feeding are smoothly performed by the functions of a clamp mechanism 10 and a tension mechanism 11.

Here, the clamp mechanism 10 functions to attach and detach the image guide 4 to the clamp 3 that moves together with the movable body 1. The tension mechanism 11 moves the cable reel 5 in a direction in which the image guide 4 does not slacken between the cable reel 5 and the clamp mechanism 10.
It functions to give rotational torque to. Reference numeral 6 denotes an alignment winding mechanism that aligns and winds the image guide 4 onto a cable reel.

The image of the object to be monitored is guided from the moving object 1 to the cable reel 5 via the image guide 4, converted into an electrical signal inside the cable reel 5, and then guided to the monitor 14 via the cable 13. I'm scared. Regarding this video transmission system, please refer to the
This will be explained in detail using figures.

The reflected light of the object to be monitored is transmitted to the tip 4a of the image guide by the lens 15 inside the moving body 1.
is imaged. The terminal end 4b of the image guide 4 is
Since it is optically coupled to the imaging surface of a television camera 16 fixed inside the cable reel 5, the image of this reflected light is transmitted inside the image guide 4 and guided to the imaging surface of the television camera. A video signal from a television camera is taken out of the cable reel 5 via a cable 17, a slip ring 18, and a brush 19, and guided to a monitor 14 by a cable 13. The reason why the television camera 16 is fixed inside the cable reel 5 is that even when the cable reel 5 rotates to send out and take up the image guide 4, an optical image that remains constant in the vertical direction on the imaging surface of the television camera is created. It's to get it.

According to this embodiment, since the television camera is built into the cable reel, there is no need for a new device for rotating the television camera, and the device can be made smaller.

FIG. 3 shows another embodiment in which a camera 16 built into the cable reel 5 is connected to a cooler 21.
It is designed to be cooled by The optical image transmitted by the image guide is transferred to a cooler 21
The image is relayed by a lens 22 outside the cooler and a lens 23 inside the cooler, and is imaged on the imaging surface of the camera. A heat insulating glass 24 is inserted between the lens 22 and the lens 23 to create a vacuum state between the lens 23 and the lens 23, thereby increasing the heat insulation between the camera body and the surrounding air. According to this embodiment, the cable reel 5 can be installed in high temperature air.

FIG. 4 shows another embodiment, in which a television camera 16 is installed in a camera case 41 outside the cable 5. One end of the image guide 4 guided into the cable reel is coupled to a bearing 26 so as to be rotatable relative to the relay lens frame 25. The optical image transmitted by the image guide 4 is transmitted via a relay lens 27 to an image guide 28 that does not rotate. Furthermore, the optical image passes through another relay lens 29,
The image is formed on the imaging surface of the television camera 16 via an image guide 31 that is rotatable with respect to the relay lens frame 30. When the cable reel rotates,
Since the end of the image guide 4 also rotates at the same time,
The light image propagating within image guide 28 rotates. In order to obtain a non-rotating image on the imaging surface of the television camera 16, it is necessary to rotate the television camera case 32 in synchronization with the cable reel 5. Therefore, the rotational position of the cable reel 5 is detected by the gears 33, 34 and the position detector 35, and
The rotational position of the camera case 32 is detected by the gears 36, 37 and the position detector 38. Then, the camera case 32 is rotated synchronously with the cable reel 5 by the electric motor 40 via the gears 36, 37, and 39 so as to eliminate positional deviation between the two. The method for extracting signals from the camera case 32 to the outside is the same as the example shown in FIG. 2, and will therefore be omitted. According to this embodiment, since the camera can be installed at any position, there are no restrictions on the installation location of the cable reel.

As described in detail above, according to the present invention, the video transmitted from the moving object to the television camera is not affected by the rotation of the cable reel.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment in which the present invention is applied to a remote viewing device, FIG. 2 is a detailed diagram showing the main part of the present invention in FIG. 1, and FIG. 3 is a modification thereof. FIG. 4, which is a diagram showing an example, is a configuration diagram of another embodiment. DESCRIPTION OF SYMBOLS 1... Moving object, 4... Image guide, 5... Cable reel, 8... Chain drive mechanism, 16... Television camera.

Claims (1)

[Claims] 1 A mobile object equipped with a light receiving unit that captures images,
A driving means for the movable body, an image pickup device located outside the movable body and apart from the movable body, a flexible optical system for transmitting image information obtained by a light receiving section to the image pickup device, and a flexible optical system. a cable reel to be wound up, an end of the flexible optical system on the imaging device side is taken into the cable reel, and the imaging device is fixed inside the cable reel, and the imaging device and the flexible optical system are fixed to the inside of the cable reel. A remote viewing device characterized in that an end of an optical system on the side of an image sensor is optically coupled.