JPS60227186A - Radiation television set - Google Patents

Abstract

PURPOSE:To measure the radiation atmosphere of a working area automatically and to facilitate listing and displaying operation by putting a radiation detection part in alternate horizontal and vertical scanning operation. CONSTITUTION:A detection part scanning mechanism consists of vertical and horizontal scanning mechanisms 9 and 10. The mechanism 9 has a driving motor decelerating means which has an axial line along a horizontal rotating shaft 19 and decelerates and transmits the rotation of a worm gear to the radiation detection part 2 and the mechanism 10 has a decelerating means for a driving motor 16. Then, the detection part 2 is scanned horizontally in one direction by the mechanism 10 and then scanned vertically by the mechanism 9, and further scanned horizontally in the opposite direction by the mechanism 9. For the purpose, a specific number of horizontal scans and vertical scans are repeated alternately.

Description

Detailed Description of the Invention [Technical Field to which the Invention Pertains] The present invention processes the radiation intensity or radiation dose rate detected by a radiation detection unit using a microcomputer, etc. The present invention relates to a radiation television apparatus that divides the display screen into predetermined sections and displays, for example, in color, the average value or the maximum value of the dose rate.

[Prior art and its problems]

In general, in nuclear power plants, etc., the direction of leakage from radiation emitted by equipment or plumbers (particularly radiation) is
By detecting the intensity or Itoi equality and creating a Todoroki map etc., it is necessary to have a control unit C and θt'.

1 Haruni, this kind of traditional official function! ”, the radiological atmosphere in the work area was not explained in human terms, and the tabulation skills/
ζ has one i by making it hexagonal. Therefore, j1
11 Not only are regular workers suffering from the problem, but their work is also under control.

And it took a long time! c'12s2. It has a point '<a.

[Purpose of the invention]

The present invention focuses on the above-mentioned points and effectively solves the IgJ problems of the prior art, and its purpose is to automate the measurement operation of radiation fine intensity or dose rate, etc., and save labor. The present invention provides a radiation television device that is easy to handle and operate.

[Key points of the invention]

In order to achieve such an object, the present invention includes first drive motor deceleration means for decelerating the first drive moke so that the drive means scans a first required angle in the horizontal direction within a first required time. a horizontal scanning mechanism having a position detection means for detecting scanning position sound in the horizontal direction; and a second drive motor fully decelerating drive roller so as to scan a second required angle in the vertical direction within a second position time. The second drive motor deceleration means is
Equipped with a vertical 7-scanning mechanism, the 13TJ-recording 1 introduction output means can be hidden in one direction by the half-scanning mechanism, and then vertically by the 11ff vertical scanning mechanism. Set the scanning field, and further write Nil; flat running hill machine No. 1) to counter force + LJ. It is a special request.

[Embodiments of the invention]

Next, one embodiment of the present invention will be described in detail based on the drawings.

Fig. 1 is a block diagram of a radiotherapy device according to the present invention, and Fig. 2 is a schematic diagram of the radiotherapy detection unit.
Fig. 3 shows an explanatory diagram of the operation of the radiation detection unit or the detection unit scanning mechanism. In Figure 3, l is a distance meter, 2 is a radiation sensor (mountain part, 3 is a detection unit scanning mechanism, 4 is a radiation measuring device,
5 is a digital computer such as a microcomputer, 6 is a CRT display device, and 7 is a recorder. Of these, distance M
For example, an optical distance meter often used in automatic focusing cameras can be used for ll, and a rate meter can be used for the measuring device 4.

The radiation detection unit (radiation detection means) 2 includes a radiation detector such as a lunch detector (not shown) or a semiconductor detector (not shown) inside a container 8 made of lead or the like. Note that by shielding this detector with the lead container 8, only radiation from a predetermined direction can be effectively introduced.

As shown in FIG. 2, the radiation television detection section 20 includes a rangefinder 1, a radiation detection section 2, a scanning means (detection section scanning mechanism) 3, a television camera 1, and a radiation detection section 2 that can be moved up and down. Folding type pull-down link machine #412 A trolley 14, etc., which allows the radiation detection unit 2 to be moved freely by a folding link machine #412 and a single wheel 13. Of these, the detection unit scanning mechanism 3 is
Current +N, JS and horizontal scanning mechanism9. It consists of lO.

Further, the reverse motors 15 and 16 with brakes rotate the vertical or horizontal scanning mechanisms 9 and 10, respectively.

Note that the foldable lifting link mechanism 12 is connected to the hydraulic cylinder 1.
It can be raised and lowered by hydraulic operation. Furthermore, Figure 3 (
As shown in C1, the measurement object plane OB including the object to be measured or the area is horizontally scanned 90 degrees to the right from the starting point A in this embodiment, and the required time is 1 minute. Next, it is rotated by 2.25 degrees in the vertical direction, and the required time is 2 seconds. Thereafter, in the opposite direction to the above, it is horizontally scanned by 90 degrees from right to left for 1 minute, and then rotated vertically by 2.25 degrees for 2 seconds. By repeating the same operation, a total of 30 horizontal scans are performed, ft, and this scan ends at the end point B. At this time, total vertical scanning angle θij 2.25 degrees x 29 = 65
．． It is 25 degrees. After this ends, the radiation detection section 2 and the detection section scanning mechanism 3 return to the starting point A again.

The overall operation will be explained below.

In FIG. 1, the radiation intensity detected by the radiation detector 2 is given to a measuring device 4 in the form of a pulse signal, and the measuring device 4 obtains a radiation intensity signal per unit time. This signal is an analog signal, and therefore, in order to be read by the microcomputer 5, it must be converted back into a digital signal. This is because it is only possible to input the information into the microcomputer 5. Note that the output from the measuring device 4 can be given to a recorder 7 to record it. On the other hand, it is known that the radiation intensity is a function of distance, that is, inversely proportional to the square of the distance. Enter. In microcomputer 5,
Based on the distance information from the distance meter 1, the measurement amount of radiation given via the measuring device 4 is calculated.

The scanning of the fixed target plane OB is performed as explained in FIG. By repeating this process twice, information on the radiation 1w within the measurement target plane OB is collected. The radiation information obtained in this way is corrected based on the distance as described above, and is then given to the citTH display 6 and displayed. Although only the CRT display device 6 is shown as a mounting part in FIG. 1, it goes without saying that a printing device may be provided as required.

Next, FIG. 4 is a schematic configuration diagram of an embodiment of the present invention, and FIG. 5 is a sectional view of FIG. Figures 4 and 5
In the figure, parts having the same functions as those in Figure 2 are given the same reference numerals. The radiation i detection section 2 is housed in a detection section mounting frame 18, and is fixed to the detection section mounting frame 18 with a horizontal rotation axis j9i whose axis coincides with the detection center C of the radiation detection section 2 by a bolt zoA. This horizontal rotation shaft 19 is rotatably supported by a bearing 22 installed on a mounting frame 21 in a direction perpendicular to the radiation detection section 2 . 23 is a bearing cover, and 24 is a mounting bolt.

The detection unit scanning mechanism 3 consists of vertical and horizontal scanning mechanisms 9 and 10, and the vertical scanning mechanism 9 includes a saver driver 25 directly connected to the drive motor 15, a Geneva gear 26 that engages with and is driven by the saver driver 25, and a It has a first lateral movement moke deceleration means consisting of a worm gear 27 directly connected to the backplane 26, a horizontal circular rotor 119ff, a worm wheel 28 that decelerates the rotation of the axis binding worm gear 27 (r-) and transmits it to the radiation detection unit 2. 1, this deceleration means is a limit switch 2 for detecting soil/lower limit and horizontal position 1h4.
9.30.31 and the attached feature of the limit switch 32 for stopping the Geneva gear was installed. Where;), the connecting shaft 33
One end is integrally fixed to the rotation 11 of the drive hW motor 15, and the other end is rotatably supported by a bearing 34. Geneva driver 25 is connected to 41I3 as shown in FIG.
3 is integrated with a fixed hinge 35 and a set screw 36;
2, which is provided near the periphery between the kite part 37 and the kite part 37.
It has two drive bins 3B. Also, Geneva Gear 2
6 is a worm gear 27, a key 39, and a set screw 40
integrally fixed by h, each of the four slide parts 4
1 and a driven groove 42.

This sliding part 4] and the driven groove 42 extend 7 ft as the Saibatriver Z5 rotates.
and is engaged with the drive bin 38, and can be rotated intermittently. Although the battleship 25 is driven by the drive motor 15, the rotation is not transmitted to the Geneva gear 26 and the drive pin 38 is By engaging with the driven groove 42 of the Geneva gear 26, the Geneva gear 26 rotates! do. This is 5, Geneva gear 26 is 9
It is moved by 0 degrees (b) to drive the worm wheel 28 via the worm gear 27. In this embodiment, the 9-ohm wheel 28 has 40 teeth. Therefore, the rotation angle of the radiation detection unit 2 in the vertical direction each time is 360 degrees X --= 2, 25 degrees 4×40.

By the way, a roller 43 is attached to the worm wheel 28, and a U-rail 4 is attached to a roller arm 44A fixed to the rotating shaft 19. This loan 43°4'4iIJ: The limit switch 29+"Okf" which produces the upper limit position change or 1st limit position during vertical scanning is activated, and this operation stops the drive motor 5. Also, worm wheel 2
A roller 45 is attached to 8 to detect the horizontal position during vertical scanning and to activate the mint switch 3. As a result of this operation, the horizontal position of the radiation detection section 5 stored in the computer 5 shown in FIG. 1 is searched.

Furthermore, the Geneva cam plate 46 has a connection ll111133.
The cam plate 46 has four cam protrusions 47 protruding from the periphery thereof at equal intervals.

The drive pin 38 of the Geneva driver 25 and the driven groove 42 of the Geneva gear 26 are engaged with each other, thereby making the Geneva gear 26
When the zero rotation ends and the engagement between the guide section 37 and the slide section 41 begins, the limit switch 32 comes into contact with the cam projection piece 47 and operates so that the starting motor 15 is stopped. In this embodiment, two I7 Mitswitches 32 are provided to ensure reliable operation.

Next, the horizontal scanning mechanism 1o includes a box body 49 and a drive motor 1.
6 and the worm gear 5 connected via the connecting shaft 50fL
1 and a worm wheel 52 for decelerating the rotation of the worm gear 51. Worm gear 511”i, both ends or bearings 53, 54
It is rotatably supported by. The upper end of the worm wheel 52 is fixed to the lower end of the mounting frame 21, and is connected to the shaft 55, rotatably supported by bearings 56, 56A, and the lower end is fixed to the lower end of the mounting frame 21. The body 49 is rotatably supported by a bearing 57 provided on the bottom plate thereof. Note that the shaft end of the worm wheel 52 is directly connected to a position detecting means, which is a rotary encoder 58 in this embodiment.

The horizontal scanning position of the radiation detection unit 2 is detected by the rotary enhancer 58 and transmitted to the digital computer 5 as detected position information. Furthermore, limit switch 5
9.60 is the worm wheel 5 as shown in No. 7 I.
2, the upper limit and first limit of the horizontal scanning angle are detected. Further, the photoelectric switch 62 is connected to a tracing plate 6 which is attached to the worm wheel 52.
3, the horizontal scanning center position tFt, ? c is sent 18 to the digital computer 5 to check that the horizontal scanning angle allows scanning of exactly 90 degrees with the central position i as a total reference. Furthermore, the limit switches 64 and 65 are connected to the hull 4.
In addition to rotating the TV camera 11 attached to 90㎉ij'<i by 30 degrees each in the upward or ] direction, this rotation can be transferred to the digital computer 5. Send. By this transmission, the digital computer 5
gives a rotation command to 4r: direct running property: IBi (9) so as to rotate the radiation detection unit 2 in the same direction as the television camera 11. 67 is installed at a horizontal position on the ground or below the television camera 11. Redundant ¥i foot, 68 is limit switch 64.6
5 is a roller that operates.

In this embodiment, although the horizontal scanning position q is detected incorrectly due to the limited number of i-cli encoders 58 installed at the horizontal scanning position JO, the 11-encoder 58 is not detected at the horizontal scanning position JO. In the digital K1n-m5, the vertical scanning position is detected by performing 111 vertical scanning operations.

However, similar to the horizontal scanning mechanism 10, the Rourke II-encoder is placed in the vertical scanning position 9 b ff? It’s also okay to f.”
Ai in Noh.

[Effects of the Invention] As described above, according to the present invention, there is provided a radiation detecting section that detects the radiation intensity of a radiation target plane, a horizontal scanning position for horizontal scanning, and a step for vertical scanning. By alternately repeating horizontal scanning and vertical scanning of the radiation detection unit, the radiation atmosphere in the working area can be dynamically measured. It has the advantages of being labor-saving, easy to handle, and can be used without exposure to radiation.

[Brief explanation of drawings]

No. 1 shows a block diagram of the radiation-axis television device to which this book is applied, and No. 2-1 shows a schematic diagram of the radiation television detector. Figure fBl is (Sen J recess 1?), Figure 3 shows an explanatory diagram of the operation of the radiation 4 disaster emitting part and the detection part scanning mechanism, and the same figure (4) shows its horizontal scanning angle. Vertical scanning angle, the same figure (C1 is the horizontal and vertical scanning state, FIG. 4 is a schematic configuration diagram of an embodiment of the present invention, FIG. 5 is a side sectional view of FIG. 4, and FIG. 6 is the Geneva gear operating state) The figure shows the prisoner in its resting state, the same figure (the prisoner in its rotating state, Figure 7 is a schematic diagram of part A in Figure 5, and Figure 8 is a schematic diagram of part B in Figure 5. 2: Radiation detection unit, 3: Detection unit scanning mechanism, 9: Vertical scanning mechanism, IO: Horizontal scanning mechanism, 35.16 = Drive motor,
25: Geneva Driver, 26: Geneva Gear, 27.5]
: Worm gear, 28° 52: Worm wheel, 29
．． 30.31. 59.60, 64, 65: Limit switch, 58: Rotary encoder. Patent applicant: Fuji Electric Seizo Co., Ltd. (C) ; l'f 3 1'), ] Row 2 Figure (B) Figure 6

Claims (1)

[Claims] 1) A radiation detection means for detecting the intensity of radiation emitted from a predetermined object or area, and a radiation detection means that causes the detection means to horizontally and vertically scan a measurement target plane including the object or area to detect radiation within the measurement target plane. scanning means for detecting the radiation intensity of the radiation, 11) distance measuring means for measuring the distance from the measurement illusion plane to the radiation detection means, and the radiation! # The radiation detection signal obtained by the horizontal scanning of the detection means is sampled a predetermined number of times at the timing of the movement, and the information obtained at the timing of the movement is corrected based on the distance information from the distance measurement means. In the radiation television apparatus, the scanning means scans a first required angle in the horizontal direction within a first required time. 11. A second drive motor deceleration means for decelerating the drive motor and a means for detecting the horizontal scanning position Ift. (Yochiji = A horizontal scanning mechanism that has a set and metal structure, and a second drive motor deceleration means that decelerates and drives the second drive motor so as to scan a second required angle in the vertical direction within a second required time. The radiation detecting means is horizontally scanned in one direction by a vertical scanning mechanism, and then scanned in a vertical direction by a vertical scanning mechanism, and further by the horizontal scanning mechanism. A radiation television apparatus characterized in that horizontal scanning and vertical scanning/scanning are repeated alternately a predetermined number of times to cause horizontal scanning in opposite directions.