JPH03249504A - Measuring instrument for first wall shape of nuclear fusion reactor - Google Patents

Abstract

PURPOSE:To measure the state of the wall surface in the reactor in a short time with high accuracy by inserting a sensor head whose angle between the line connecting laser light and a subject and the line connecting the subject and a photodetection part is fixed into the nuclear fusion reactor, and adjusting the distance between the sensor head and subject. CONSTITUTION:A fixed light projector is fitted to a light projection part 1, a fixed TV camera is fitted directly to the photodetection part 2, and the distance to the subject 3 is adjusted by a moving link 6. A driving device 7 and a moving cylinder 5 are operated according to a signal from a personal computer 10 and the moving link 6 is operated to align the position of the point where the laser light 4 and the center line of the photodetection part 2 intersect each other to the subject 3 with the level of the surface of the subject 3, so that the photodetection part 2 measures the surface state of the subject 3 continuously. Measurement data when the subject is assembled completely is inputted to the personal computer 10 and the surface state of the subject 3 in the reactor is measured similarly after the nuclear fusion reactor is used for a certain time and compared with measurement data when the reactor is in a sound state to find a worn part and its wear quantity.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for inspecting wear and the like on the surface facing the plasma of a first wall that is arranged to surround the plasma in a nuclear fusion reactor. It is related to.

[Prior art] The first wall of a fusion reactor faces plasma and has the potential to cause damage due to high thermal load, fatigue due to thermal stress, or thermal shock, which may cause damage to its health. Monitoring and inspection are essential to maintain the health of animals and their health. Conventionally, when implementing this, after restoring the pressure inside the fusion reactor to atmospheric pressure when the fusion reactor is shut down,
There are methods to measure the thickness of the first wall protection material using an ultrasonic thinning gauge, linear observation of the surface condition using a Veriscope, etc., or methods to measure the vacuum inside the fusion reactor as described below. The shape of the surface of the first wall is measured while it is being held. An example of the prior art is an optical position detection method disclosed in Japanese Patent Publication No. 121103/1983. 5 and 6 are diagrams showing the principle of optical position detection in the prior art example.
The figure is a diagram in which the slit patterns before and after the subject is moved are superimposed on the same image sensor screen. 5th ~
6, 51 is a V-shaped part, 52 is a slit pattern, 53 is a slit light source, 54 is an image sensor, 5
5 is the subject, 56 is the image sensor screen, la', lb
' is the target point, 28' is the slit pattern image after movement, 2
b' is a slit pattern image before movement, and the outline of its detection method is as follows.

First, an orthogonal coordinate system x-y-z in which the optical axis of the image sensor 54 is the Z axis, the center of the lens of the image sensor 54 is the origin O, and the straight line that intersects the optical axis of the slit light source and passes through the origin ○ is the Y axis.
, and select an orthogonal coordinate system x, -y on the screen 56 of the image sensor 54 with the y-axis parallel to the above-mentioned Y-axis. The image sensor 54 and the slit light source 53 are arranged so that the slit light beam emitted from the slit light source 53 is parallel to the Y axis and the surface constituting the subject 55 is parallel to the X axis near the optical axis Z.
It is arranged. Then, if the slit pattern image 2a' after movement in FIG. 6 is viewed as a function f on the x-y coordinate system of the image sensor screen 56, fl'! Construct a single-valued function with respect to the y-axis, and also the slit pattern before movement @2b'
The same can be said about.

As shown in FIG. 6, if part of the slit pattern image affected by the unevenness of the object surface is set as the target values 1a' and 1b', the geometric parameters of the image sensor 54 and the slit light 153 are known. Therefore, the amount of deviation between the two slit pattern images 2a2b' can be expressed as the amounts of deviation ΔX and Δy of the target values 1a and lb'. Therefore, select the end point, inclination, and curvature as the shape characteristics of the slit pattern image 2b' before movement and the slit pattern image 2a' after movement, and calculate the above deviation amounts △X and △y by correlating them. becomes possible.

[Problems to be Solved by the Invention] As described above, in the conventional technology, the thickness of the first wall protection material is directly measured using an ultrasonic thickness gauge, or the thickness of the first wall protection material is directly measured using a veloscope, etc. In addition to observing the surface condition, it was possible to measure the surface of the object using the principle of triangulation using a slit light source and an image sensor. However, in the above-mentioned conventional technology, the method of using an ultrasonic thickness gauge requires a large amount of expense to first return the pressure inside the fusion reactor from a vacuum state to atmospheric pressure and then return it to a vacuum state. Direct observation using a periscope, etc. requires qualitative inspection, making it difficult to quantitatively assess the state of wear and tear. Also, the capacity of the light source for illumination is large, and a cooling device is required accordingly. It had a problem that caused it to become. Furthermore, the measurement method using a slit light source and an image sensor cited in the prior art section is an excellent method in terms of its simple configuration and high measurement accuracy. Because a focusing lens was used and the angle formed by the line connecting the slit light source, the subject, and the image sensor was almost constant, when the field of view of the image sensor is wide, the angle between the slit light source and the image sensor is small. By moving the first fusion reactor over a wide area
Although the wall surface can be measured, the resolution accuracy is low, and conversely, if the field of view of the image sensor is narrow, the resolution accuracy is high, but it takes a long time to complete the measurement of the entire wall surface. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such problems and provide a shape measuring device that can measure the condition of the entire wall surface in a short time and with high precision using a simple configuration.

[Unique Means for Solving the Problem] The above object is achieved by the fusion reactor first wall shape measuring device described in the claims. That is, ■ When the angle between the line connecting the laser beam and the object irradiated with the laser beam and the line connecting the object and the light receiving section is θ, the angle θ is fixed and the angle between the laser projecting section and the light receiving section is A fusion reactor first wall shape measuring device comprising means for adjusting the distance between the sensor head inserted into the fusion reactor and the subject.

(1) The fusion reactor No. 1 according to claim (2), wherein the laser emitter of the sensor head inserted into the fusion reactor has a laser emitter directly disposed thereon, and the light receiver has an image sensor directly disposed thereon. 1 Wall shape measuring device.

■ The laser emitter of the sensor head inserted into the fusion reactor optically connects the laser oscillator installed outside the fusion reactor and the emitter lens installed inside the fusion reactor via an optical fiber. The light-receiving part of the sensor head optically connects the light-receiving lens placed inside the fusion reactor with the image sensor placed outside the fusion reactor via an optical fiber. A fusion reactor first wall shape measuring device according to claim (2).

■ The light receiving part of the sensor head inserted into the fusion reactor,
The optical path of the laser beam irradiated from the laser emitter and the above-mentioned sensor head can be tilted parallel to the plane containing the light receiving part to change the angle θ. A fusion reactor first wall shape measuring device having means for adjusting the distance between a sensor head inserted into the reactor and a subject.

(1) The fusion reactor No. 1 according to claim (2), wherein the laser emitter of the sensor head inserted into the fusion reactor has a laser emitter directly disposed thereon, and the light receiver has an image sensor directly disposed thereon. 1 Wall shape measuring device.

■ The laser emitter of the sensor head inserted into the fusion reactor optically connects the laser oscillator installed outside the fusion reactor and the emitter lens installed inside the fusion reactor via an optical fiber. The light-receiving part of the sensor head is optically connected to the light-receiving lens placed inside the fusion reactor and the image sensor placed outside the fusion reactor via an optical fiber. A fusion reactor first wall shape measuring device according to claim (2).

(2) A fusion reactor first wall shape measuring device according to claims (2), (2), (2), (2), and (3) in which a zoom lens is used in the light receiving portion.

■Claim ■, claim ■, claim ■, claim ■ in which multiple lenses with different focal lengths are used in combination in the light receiving section
A fusion reactor first wall shape measuring device according to claims (1) and (2).

It is.

The effects of the present invention will be explained below based on examples.

[Example] Figures 1 to 4 are diagrams showing examples based on the present invention.
Figure 2 shows the basic configuration of a fusion reactor first wall shape measurement device in which a fixed projector is installed in the light projector, a fixed TV camera is directly installed in the light receiver, and the distance to the subject can be adjusted using a moving link. Figure 3 is a diagram showing the case where the television camera of the light receiving section is made tiltable in Figures 1 and 2, and Figure 4r! i
! J is a case in which a laser oscillator and a television camera are placed outside the fusion reactor, optically connected to the light projecting lens and light receiving lens placed inside the fusion reactor through optical fibers, and the light receiving part is made tiltable. FIG. 2 is a diagram showing the basic configuration of. In Figures 1 to 4, 1 is a light projector, 2 is a light receiver, 3.3', 3' is a subject, 4 is a laser beam, 5 is a moving cylinder, 6 is a moving link, 7 is a drive device, and 8 is a An image processor, 9 a monitor television, 10 a personal computer, 11 inside the furnace, 12 outside the furnace, 13 a laser oscillator, 14 an optical fiber for projecting light, 15 an optical fiber for receiving light, 16 a light receiving unit operating device, Reference numeral 17 denotes an image sensor; θ, θ', and θ' are angles between a line connecting a laser beam and an object irradiated with the laser beam, and a line connecting the object and a light receiving section.

The main purpose of the present invention is to discover abnormalities on the inner wall surface of a fusion reactor vacuum vessel and perform precise measurements in a short period of time, which will be explained in detail based on the drawings.

In FIG. 1, a light projecting unit 1 that irradiates a subject 3 with a laser beam 4 and a light receiving unit 2 that is an image sensor that images the subject 3 irradiated with the laser beam 4 are fixed to a movable link 6 that has a guide bar. , the movable link 6 approaches or moves away from the subject 3 by expanding and contracting the movable cylinder 5. A drive device 7, which swingably supports one end of the moving cylinder 5 and has one end of the moving link 6 fixed, can move based on a signal from the personal computer 10.

First, when the light receiving section 2 is fixed to the movable link 6, the driving device 7 and the moving link 6 are operated as shown in FIG. is made to match the level of the surface of the subject 3 to be imaged, and the light projecting unit 1 and the light receiving unit 2 are moved parallel to the surface of the subject 3 while adjusting the driving device 7 and the moving link 6 so as to maintain this level. , the surface state of the subject 3 is continuously measured by the light receiving unit 2. The reflected light of the laser beam 4 on the subject 3 captured by the light receiving section 2 is converted into an electrical signal and sent to an image processor (image processing device) 8, where it is displayed on the screen of a monitor television 9 and sent to a personal computer 10. It will be done. Measurement data when the subject 3 is in a healthy state is manually stored in the personal computer 10 in advance. After the fusion reactor has been in service for a certain period of time, the surface condition of the subject 3 inside the reactor is measured again according to the above-mentioned procedure, and the results are input into the personal computer 10 and compared with the measurement pig in a healthy state, and the worn parts and worn parts are compared. Find the quantity.

If the amount of wear and tear on the subject exceeds a predetermined tolerance limit, a more detailed re-measurement is performed on that part. That is, in the second step, the drive device 7 and the moving link 6 are operated based on the command from the personal computer 10 to bring the light receiving unit 2 as close as possible to the target object 3 and collect detailed data on the surface condition of the object 3. do.

The above operation is repeated for all subjects 3 whose wear amount exceeds the allowable value to obtain necessary data. In Figures 1 and 2, even if the television camera used in the light receiving section 2 is of a fixed focus, the intended purpose can be achieved, but if the television camera is equipped with a zoom lens or multiple lenses with different focal lengths, When used in combination, it becomes possible to further increase the resolution and measure the amount of wear more precisely.

In contrast to the fixed type light receiving section 2 shown in FIGS. 1 and 2, FIG. The angle θ formed by the line connecting the laser beam 4 and the subject 3 irradiated with the laser beam 4 and the line connecting the subject 3 and the light receiving B2 is set to θ' or θ', etc. This shows the case where it is possible to change. As a result, when measuring the shape of the inner wall of a fusion reactor, the position of the object 3 relative to the light projecting unit 1 is 3' or 3'.
Even in the event of a change in the shape of the fusion reactor, images can be captured by simply tilting the light receiving unit 2 without moving the drive device 7 and the moving link 6. This significantly reduces the time required to measure the shape of the inner wall surface of the fusion reactor. It becomes possible to do so. Third
In the case shown in the figure, as in the case of Figs. 1 and 2, by using a zoom lens or a combination of multiple lenses with different focal lengths in the light receiving section 2, resolving power is increased and more precise measurements can be performed. becomes possible.

In Fig. 4, the light emitting part 1 in Figs. 1 to 3 is a laser projector directly installed, and the light receiving part 2 is a television camera directly installed, whereas the light emitting part 1 in Figs. Only a light emitting lens and a light receiving lens are installed in the fusion reactor, and the light emitting part is formed by optically connecting the laser oscillator and the light emitting lens installed outside the fusion reactor with an optical fiber. A light receiving section is formed by optically connecting an image sensor disposed outside and a light receiving lens through an optical fiber.

Further, the light receiving section 2 is similar to the case in FIG.
By tilting the angle θ, the angle θ can be changed to θ' or θ'. As a result, even if semiconductors are used in the laser oscillation part or image sensor, they can be used continuously for a long time without being damaged by the radiation inside the fusion reactor, and the light receiving part can be tilted to change the angle θ. By obtaining this, the measurement time for the first rough measurement can be shortened.

Furthermore, by using a zoom lens or a combination of multiple lenses having different focal lengths in the light receiving section disposed in the fusion reactor, it is possible to improve resolution and make more precise measurements possible.

[Effects of the Invention] As described above, according to the present invention, the following effects are achieved as is clear from the above embodiments.

■ When the first wall of the fusion reactor is assembled, the surface condition of each part of the first wall is measured and the results are used as reference values. After a certain period of service, rough measurements of the inner wall of the fusion reactor are performed and compared with the above reference values. Select areas where the difference exceeds a predetermined tolerance value, move the light receiving unit closer to those areas, measure by tilting the light receiving unit, or use a zoom lens, etc. In addition to enlarging and measuring the part to be measured, by automatically performing the series of measurement operations described above by a computer, it is possible to significantly shorten the time required for measurement and significantly improve measurement accuracy.

■ When measuring the shape of the first wall, only a light emitting lens and a light receiving lens are placed inside the fusion reactor for both the light emitting part and the light receiving part, and a laser oscillator and an image sensor are placed outside the fusion reactor. By optically connecting each of them with an optical fiber, the radiation resistance of the light projecting part and the light receiving part can be improved, and the soundness can be maintained for a long period of time, making it possible to carry out measurements.

[Brief explanation of drawings]

1 to 4 are diagrams showing the basic configuration of an embodiment based on the present invention, and FIGS. 5 to 6 are examples of the prior art. 1...Light emitter, 2...Light receiver, 3.3
'3'...Subject, 4...Laser light,
5...Moving cylinder, 6...Moving link, 7...Drive device, 8...Image processor, 9...Monitor television, 10...
... Personal computer, 11 ... Inside the furnace, 12 ... Outside the furnace, 13 ... Laser oscillator, 14 ... Optical fiber for light projection, 15・
.... Optical fiber for light reception, 16 .... Light reception unit operating device, 17 .... Image sensor, θ, θ',
θ′...Angle between the line connecting the laser light and the subject irradiated with the laser light and the line connecting the subject and the light receiving section, 51...V-shaped part, 52... Slit pattern, 53... Slit light source, 54...
...Image sensor, 55...Subject,
56... Image sensor screen, la, lb'
...Target point, 2a'...Slit pattern image after movement, 2b'...Slit pattern image before movement.

Claims (8)

[Claims] (1) When the angle between the line connecting the laser beam and the subject irradiated with the laser beam and the line connecting the subject and the light receiving section is θ, the angle θ is fixed, and the laser projecting section and the light receiving section are fixed. A fusion reactor first wall shape measuring device, characterized in that it has means for adjusting the distance between the sensor head inserted into the fusion reactor and the subject. (2) Claim (1) wherein the laser emitter of the sensor head inserted into the nuclear fusion reactor is one in which a laser emitter is directly disposed, and the light receiver is one in which an image sensor is directly disposed.
) The fusion reactor first wall shape measuring device described in (1). (3) The laser emitter of the sensor head inserted into the fusion reactor connects the laser oscillator installed outside the fusion reactor and the emitter lens installed inside the fusion reactor via an optical fiber. The light-receiving part of the sensor head is optically connected to the light-receiving lens installed inside the fusion reactor and the image sensor installed outside the fusion reactor via an optical fiber. The fusion reactor first wall shape measuring device according to claim (1). (4) The angle θ is varied by tilting the light receiving part of the sensor head inserted into the fusion reactor parallel to the optical path of the laser beam irradiated from the laser projecting part and the plane containing the light receiving part of the sensor head. A first wall shape of a fusion reactor characterized by having means capable of adjusting the distance between a sensor head consisting of a laser projecting part and a light receiving part and being inserted into the fusion reactor and a subject. measuring device. (5) Claim (4) wherein the laser emitter of the sensor head inserted into the nuclear fusion reactor is one in which a laser emitter is directly disposed, and the light receiver is one in which an image sensor is directly disposed.
) The fusion reactor first wall shape measuring device described in (1). (6) The laser light emitting part of the sensor head inserted into the fusion reactor connects the laser oscillator placed outside the fusion reactor and the light emitting lens placed inside the fusion reactor via an optical fiber. The light-receiving part of the sensor head optically connects the light-receiving lens installed inside the fusion reactor with the image sensor installed outside the fusion reactor via an optical fiber. The first nuclear fusion reactor according to claim (4), which is
Wall shape measuring device. (7) Claim (1) in which a zoom lens is used in the light receiving section;
Claim (2), Claim (3), Claim (4), Claim (
5) and a fusion reactor first wall shape measuring device according to claim (6). (8) Claim (1), Claim (2), Claim (
3), claim (4), claim (5), and claim (6)
) The fusion reactor first wall shape measuring device described in (1).