JPS6228900A - Remote controller used in radiation atmosphere - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an improvement in a device for remotely controlling machinery used in a radioactive atmosphere.

[Prior Art] Conventionally, remote control of machinery installed in a radiation atmosphere in a nuclear facility in a place where it is difficult for people to enter has been performed using electrical signals transmitted through cables.
In other words, the internal control device of the machinery installed inside the cell A in the radiation atmosphere and the main control device installed outside the cell B across the shielding wall are connected by cable via an embedded pipe installed in the shielding wall 4. and electrically connected using a special @-made connector to send control signals.

According to this method, in order to prevent radiation leakage,
The shielding wall 4 requires troublesome construction work such as installing an embedded pipe designed to prevent radiation from passing through. Furthermore, when machinery is moved from one cell to another for maintenance work, it may be necessary to remotely attach and detach the connectors. In order to facilitate this underwear work, it was necessary to adopt a special structure for the connector and install handling machines such as a master-slave manipulator and a power manipulator. In general, it is necessary to secure space for routing and arranging the cables in the cell A, which imposes restrictions on the movement of machinery and the layout.

[Problem to be Solved by the Invention 1] An object of the present invention is to solve the above-mentioned problems, eliminate the need for connectors, cables, etc. to control machinery within the cell, facilitate maintenance work, and It is an object of the present invention to provide a remote control device which can widen the range of selections of the functions 1 to 1.

Structure of the Invention [Means for Solving Problems] To explain with reference to the drawings, the remote control device of the present invention, which is open in a radiation atmosphere, has
Machinery 1 placed at Optical transmitting/receiving devices 6 optically opposed on both sides of the path 5
and 7 are arranged, the outer optical transmitting/receiving device 7 is connected to the control device main body 3, and the inner optical transmitting/receiving device 6 is connected to the internal control device 2 that controls the machinery 1.

The optical transmitting/receiving device 6 converts the electrical signal, which is information from the control device main body 3, into light (modulated light), and the light transmitted via the optical communication path 5 must be transmitted to the optical transmitting/receiving device in the cell A. 7
The light is received, converted into an electrical signal here, and after undergoing necessary information processing in the internal control device 2, is transmitted to the machinery 1 as an output signal. When the machinery 1 is used as an internal monitoring television or the like, the optical transmitting/receiving devices 6 and 7 transmit information from inside the cell to outside the cell using functions opposite to those described above.

[Function] According to the device of the present invention, the operation of the machinery 1 in the cell A is as follows:
Since it is remotely controlled by the optical transmitting and receiving devices 6 and 7 using a space transmission optical communication system, there is no need to install embedded tubes or use accessories such as connectors and cables as in the past. As a result, when performing maintenance work on machinery 1, there is no need to install or remove accessories or to install a handling machine in the cell, which greatly improves work capacity, and also eliminates the need to route and install cables. , the effective space within the cell increases.

[Actual tN aspect 1 In the device of the present invention, machinery 1 installed in cell A
Examples include machines that handle radioactive materials, such as cranes, conveyors, carts, manipulators such as Magic Hunt, gearing devices for drums and other containers, as well as various detection devices, monitor television cameras for internal monitoring, etc. .

The optical communication path 5 provided in the shielding wall 4 is simplest by simply fitting a commercially available radiation shielding glass 8 into the shielding wall 4 as shown in FIG. 1, but as shown in FIG. Alternatively, the optical lens 9Δ may be mounted on the shielding wall 4, and the end of the optical fiber 9B (7) may be positioned at the focal point of the optical lens.

FIG. 3 shows a configuration example of a cell monitoring system to which the optical communication path of FIG. 1 is applied. Optical transmitting/receiving devices 6 and 7 arranged optically opposite each other inside and outside of this optical communication path 5 have a configuration as shown in FIG.

In the illustrated example, the optical transmitting/receiving device 6 is a light transmitter and necessarily places information to be transmitted on an LED placed at the focal point of an optical lens. In other words, information as video input and audio input is amplified by an amplifier, modulated by an FM modulator, and mixed by a mixer.

The signal is transmitted to the LED through the LED driver, converted into light, and transmitted.

In the illustrated example, the optical transmitter/receiver 7 is a light receiver, and light collected by an optical lens is converted into an electrical signal by a light receiving element such as a high-speed PIN photodetector. Since the transmitted light is attenuated while passing through the optical lens and shielding glass, it is amplified by the amplifier and demultiplexed by the demultiplexer. However, each of these becomes information such as video output and audio output, and these are input as control signals to the internal IIL control device 2 that controls the machinery 1 1311 .

The optical band used for the above optical communication is 43% in the spatial transmission method.
A high-output, broadband light-emitting element (near-infrared high-output L F
The 0.85 μm band is suitable because D) is easy to make. The radiation shielding glass 8 has an appropriate specific gravity (the specific gravity of lead glass varies in the range of 2 to 5) so as to have a thickness of 800 to 400 m required to prevent leakage of radiation, although it differs depending on the type and intensity of radiation to be shielded. Use a combination of multiple sheets.

Effects of the Invention Since the remote control device in a radiation atmosphere of the present invention is configured to control machinery within a cell using the space transmission optical communication method as described above, it is easy to connect and disconnect connectors and cables within the cell. This eliminates the need for a handling machine, improving the efficiency of maintenance work and expanding the effective space within the cell.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are both schematic diagrams showing a configuration example of the apparatus of the present invention. FIG. 3 is a similar diagram showing an application of the example of FIG. FIG. 4 is a block diagram showing the mutual relationship between the transmitting and receiving devices 6 and 7 in the apparatus of the present invention. A: Inside the cell (radiation atmosphere) B: Outside the cell

Claims (2)

[Claims] (1) A device that remotely controls machinery placed in a radiation atmosphere inside a shielding wall across the wall, with optical transceiver devices optically facing each other on both the inside and outside of the optical communication path provided in the shielding wall. and connect the outer optical transmitter/receiver to the control device main body.
A remote control device for use in a radiation atmosphere, comprising an inner optical transmitting and receiving device connected to an internal control device that controls the machinery. (2) The remote control device according to claim 1, wherein the machinery placed in the radiation atmosphere is a radioactive material handling machine, and the optical communication path provided in the shielding wall is a window made of radiation shielding glass.