CN108535761B - Calibration and calibrating device for rotary alpha and beta surface pollution meters - Google Patents
Calibration and calibrating device for rotary alpha and beta surface pollution meters Download PDFInfo
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- CN108535761B CN108535761B CN201810224454.5A CN201810224454A CN108535761B CN 108535761 B CN108535761 B CN 108535761B CN 201810224454 A CN201810224454 A CN 201810224454A CN 108535761 B CN108535761 B CN 108535761B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
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- G—PHYSICS
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
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Abstract
The invention relates to a calibration and verification device for a rotary alpha and beta surface pollution meter, which comprises a measuring frame table top provided with a plurality of measuring windows, a source storage turntable which is controlled by a computer or a key to rotate is arranged below the measuring frame table top, a plurality of source storage bins and source positions which correspond to the positions of the measuring windows are arranged on the source storage turntable, a radioactive source cover plate is arranged on the surface of the measuring window of the measuring frame table top, and a monitoring camera is arranged above the measuring frame table top. The method is simple to operate and high in precision, can calibrate and calibrate a plurality of alpha and beta surface pollution meters simultaneously, and greatly improves the calibration and calibration efficiency of the alpha and beta surface pollution meters.
Description
Technical Field
The invention relates to the technical field of nuclear monitoring instruments, in particular to a rotary calibration and verification device for alpha and beta surface pollution instruments.
Background
Alpha, beta surface contamination meters are one of the most widely used nuclear radiation monitoring instruments, and calibration/verification of surface contamination meters is a necessary condition for their use. The Calibration/verification of the surface contamination meter is carried out according to the verification procedures or related standards, mainly including JJG 2041-89 < verification System for measuring Alpha and beta surface contamination > and JJG 478-2016 < verification procedure for Alpha and beta surface contamination meters in China, and international Reference is made to ISO 8769 < Reference sources-Calibration of surface contamination detectors-Alpha-, beta-and phosphor-or IEC 60325 < Radiation protection instruments Alpha, beta and (or) Alpha/beta (beta energy >60keV) contamination meters and detectors. These protocols or standards, however, only give a calibration/assay method and some necessary standard sources and do not give a specific calibration/assay setup. For example, JJG 478-2016 [ alpha, beta surface contamination Instrument detection protocol ] gives only the positioning deviation of the positioning support except for a plane source, and has no more reference information for the support. Typically, each calibration/verification laboratory uses only temporary, simple racks to perform the calibration/verification work, and there are no mature α, β surface contamination calibration/verification devices on the market. With the continuous development of the nuclear industry, the number of alpha and beta surface contamination meters is continuously increased, and an efficient calibration/verification device is required for calibration/verification work.
Previously, each laboratory used a simple rack to calibrate/verify alpha, beta surface contamination meters. According to the verification regulation, a plurality of alpha and beta standard plane sources are needed for calibrating/verifying each alpha and beta surface pollution instrument, the standard plane sources need to be manually replaced in sequence, and one instrument needs to be replaced for calibration/verification after the calibration/verification is finished. Such a complicated operation and extremely low efficiency are required, and improvement is urgently required in the case where the α, β surface contamination meter is rapidly increased.
Disclosure of Invention
The invention aims to provide a rotary alpha and beta surface pollution meter calibrating and calibrating device aiming at the current situation that the existing alpha and beta surface pollution meter calibrating and calibrating device is lacked, so that the efficiency is improved, and the calibration and calibration work of a plurality of alpha and beta surface pollution meters can be carried out simultaneously.
The technical scheme of the invention is as follows: a calibration and calibration device for rotary alpha and beta surface pollution meters comprises a measuring frame table top provided with a plurality of measuring windows, a source storage rotary table which can be controlled by a computer or controlled by keys to rotate is arranged below the measuring frame table top, a plurality of source storage bins and source positions which correspond to the positions of the measuring windows are arranged on the source storage rotary table, a radioactive source cover plate is arranged on the surface of the measuring window of the measuring frame table top, and a monitoring camera is arranged above the measuring frame table top.
Further, the calibration and verification device for the rotary alpha and beta surface contamination meters comprises a source taking and placing baffle plate arranged outside the source storage bin of the source storage turntable.
Further, the calibration and verification device for the rotary alpha and beta surface contamination meters is characterized in that the plurality of measurement windows are uniformly arranged on the table top of the measurement frame along the circumference at equal angles.
Further, the calibration and verification device for the rotary α and β surface contamination meters is described above, wherein when the calibration and verification of the α and β surface contamination meters are performed, the cover plate of the radiation source is opened, and the α and β surface contamination meters are placed on the measurement window.
Further, the calibration and verification device for the rotary alpha and beta surface contamination meters is described above, wherein an alpha or beta standard plane source is placed on the source position of the source storage bin.
Further, the distance from the alpha standard plane source to the surface contamination meter is 5mm, and the distance from the beta standard plane source to the surface contamination meter is 10 mm.
Further, the calibration and verification device for the rotary alpha and beta surface contamination meters is characterized in that a control box for controlling the rotation of the source storage turntable is arranged below the table top of the measuring frame.
Further, the calibration and verification device for the rotary alpha and beta surface contamination meters is characterized in that a support adjusting knob for adjusting the height is arranged on the support column of the table top of the measuring stand.
Further, the calibration and calibration device for the rotary alpha and beta surface pollution meters is characterized in that the storage source turntable is driven by a driving motor in a driving motor bin in the middle of the measuring frame.
Further, the calibration and calibration device for the rotary alpha and beta surface pollution meters comprises a monitoring camera and a measuring frame, wherein the monitoring camera is fixedly arranged at the top of the central upright post of the measuring frame.
The invention has the following beneficial effects: the invention provides a structure of a calibration and verification device for a rotary alpha and beta surface pollution instrument for the first time, the device is simple to operate and high in precision, meets the technical requirements of a JJJG 2041-89 verification system for measuring alpha and beta surface pollution instruments and a JJG 478-2016 verification procedure for alpha and beta surface pollution instruments, particularly can calibrate and verify a plurality of alpha and beta surface pollution instruments simultaneously, does not need to repeatedly take and put standard sources, and greatly improves the calibration and verification efficiency of the alpha and beta surface pollution instruments.
Drawings
Fig. 1 is a schematic structural diagram of a calibration and verification device for a rotary alpha and beta surface contamination meter of the invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The structure of the calibration and calibration device for the rotary alpha and beta surface pollution meters is shown in figure 1, and the calibration and calibration device mainly comprises a monitoring camera 1, a radioactive source cover plate 2, a measuring frame table surface 3, a source storage turntable 4, a source taking and placing baffle 5, a power switch 7, a control box 6, a supporting and adjusting knob 8, a turntable driving motor bin 9, a measuring frame central upright post 10 and the like.
The functions of the constituent parts are as follows:
monitoring camera 1: for real-time monitoring and data reading.
The radioactive source cover plate 2: the cover plate is used for covering the measurement window, and when the calibration/detection of the alpha and beta surface pollution meters is completed, the cover plate is put down to shield the measurement window to protect the standard plane source, so that unnecessary irradiation of rays to surrounding personnel is avoided, and meanwhile, the radioactive source is prevented from being stained.
Measuring rack table 3: used for placing alpha and beta surface pollution meters to be measured. A plurality of measuring windows are uniformly, symmetrically and equiangularly arranged on one circumference of the symmetrical shaft, and the lower part of each window is opposite to one source position in the source storage turntable; placing alpha and beta surface pollution meters on a measurement window, and respectively placing alpha and beta standard plane sources in source positions; the surface contamination meter exactly corresponds to the standard plane source, and the particles emitted by the standard plane source exactly enter the detection windows of the alpha and beta surface contamination meters; the distances between the alpha standard plane source and the beta standard plane source and the surface pollution meter are respectively determined to be 5mm and 10 mm.
And (4) storage source turntable 4: for fixing the radioactive source and controlling the rotation, the rotating mechanism can adopt the conventional design in the field. The source storage turntable and the measuring stand surface are coaxially arranged, a plurality of source positions are uniformly, symmetrically and equiangularly designed on one circumference of a rotating shaft, a standard plane source is placed in each source position and accurately corresponds to a measuring window of the measuring stand surface, and particles emitted by the standard plane source are just incident into detection windows of the alpha and beta surface pollution meters; the distances between the alpha standard plane source and the beta standard plane source and the surface pollution meter are respectively determined to be 5mm and 10 mm.
Get and put source baffle 5: when the source storage bin of the source storage turntable is placed into a standard source, the baffle plate can be closed and locked, so that the radioactive source is prevented from being taken out randomly.
The control box 6: and operating the storage source turntable to accurately rotate and position.
The power switch 7: and (4) a main switch of a power supply of the device.
Support the adjusting knob 8: the device is arranged on the supporting column of the table top of the measuring frame, and the table top of the device can reach the optimal stable state by adjusting the supporting adjusting knob.
Turntable driving motor bin 9: a motor and a gear for fixing the driving turntable.
Measuring rack center column 10: and fixing the monitoring camera, and arranging a monitoring device cable in the middle.
The working process of the invention is as follows:
several standard plane sources for calibration/verification are sequentially placed in the source positions of the source storage turntable, and the source taking and placing baffle plate is closed. The radioactive source cover plate is opened, the surface pollution meters are placed on the measuring windows on the surface of the measuring stand, and the surface pollution meters with the same number as the measuring windows can be placed.
After the surface pollution meters are placed, the calibration/verification work can be started by turning on a power switch, and each surface pollution meter starts to count. After the readings of all the surface pollution meters are finished, the storage source turntable is enabled to rotate to the next source position relative to the surface of the measuring stand through software or button adjustment, namely, each surface pollution meter realizes source change. After the source is changed, each surface pollution meter accurately corresponds to a new source position, and new counting is started and reading is completed. Measurements are taken in sequence until the batch calibration/certification job is complete. After the completion of the calibration, the next batch of surface contamination meters can be changed to continue the calibration/verification work.
And after all calibration/verification work is finished, closing a power switch and closing the radioactive source cover plate.
The invention places all the alpha and beta standard plane sources in the source positions of the source storage rotary disc source storage bin, and can place an alpha and beta surface pollution meter in the measuring window corresponding to each alpha and beta standard plane source, thereby realizing the simultaneous calibration/verification of a plurality of alpha and beta surface pollution meters. After all the alpha and beta surface pollution meters finish one-time measurement, the replacement work of all the alpha and beta standard plane sources is realized at one time by controlling a rotary button or software, the sources do not need to be replaced by one hand in the calibration/verification process, and the operation is simple. And the source changing is realized through a stepping motor accurately, the reading is realized through a monitoring camera, and the source changing and the reading can be controlled remotely.
As a specific embodiment, the table surface of the measuring rack in the scheme has 8 measuring windows, and 8 source positions (8 α, β standard plane sources) in the corresponding source storage turntable can calibrate/verify 8 α, β surface contamination meters simultaneously. After each measurement is finished, the one-time source changing of 8 alpha and beta surface pollution meters is realized through button or software control, and the reading is carried out through 4 monitoring cameras. The device is simple to operate, high in precision, and the calibration/verification efficiency is more than 8 times that of the conventional simple device.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (9)
1. The utility model provides a rotation type alpha, beta surface contamination appearance calibration and calibrating installation which characterized in that: the device comprises a measuring frame table board (3) provided with a plurality of measuring windows, wherein the plurality of measuring windows are uniformly arranged on the measuring frame table board at equal angles along the circumference, a source storage rotary disc (4) which can be controlled by a computer or controlled by a key to rotate is arranged below the measuring frame table board (3), the source storage rotary disc (4) and the measuring frame table board (3) are coaxially arranged, a plurality of source storage bins and source positions which correspond to the positions of the measuring windows are arranged on the source storage rotary disc (4), a radioactive source cover plate (2) is arranged on the surface of the measuring window of the measuring frame table board, and a monitoring camera (1) is arranged on a central upright post of the measuring frame table board; opening a radioactive source cover plate (2), placing the surface pollution meters on a measuring window on a table top (3) of a measuring frame, opening a power switch to start calibration/verification work, starting counting of each surface pollution meter, enabling a source storage turntable (4) to just rotate to the next source position relative to the table top (3) of the measuring frame after reading of all the surface pollution meters is finished, realizing source change of each surface pollution meter, accurately corresponding each surface pollution meter to a new source position after the source change, starting new counting and finishing reading.
2. The rotary α, β surface contamination meter calibration and verification device of claim 1 wherein: a source taking and placing baffle (5) is arranged outside the source storage bin of the source storage turntable.
3. The rotary α, β surface contamination meter calibration and verification device of claim 1 wherein: when the alpha and beta surface contamination meters are calibrated and checked, the radioactive source cover plate (2) is opened, and the alpha and beta surface contamination meters are placed on the measuring windows.
4. The rotary α, β surface contamination meter calibration and verification device of claim 1 wherein: and placing an alpha or beta standard plane source on the source position of the source storage bin.
5. The rotary α, β surface contamination meter calibration and verification device of claim 4 wherein: the distance between the alpha standard plane source and the surface pollution instrument is 5mm, and the distance between the beta standard plane source and the surface pollution instrument is 10 mm.
6. The rotary α, β surface contamination meter calibration and verification device of claim 1 wherein: a control box (6) for controlling the rotation of the source storage turntable is arranged below the table top of the measuring frame.
7. The rotary α, β surface contamination meter calibration and verification device of claim 1 wherein: and a support adjusting knob (8) for adjusting the stable state of the equipment table top is arranged on the support column of the measuring frame table top.
8. The rotary α, β surface contamination meter calibration and verification device of claim 1 wherein: the storage source turntable (4) is driven by a driving motor in a driving motor bin (9) in the middle of the measuring frame.
9. The rotary α, β surface contamination meter calibration and verification device of claim 1 wherein: the monitoring camera is installed and fixed on the top of the central upright post (10) of the measuring frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810224454.5A CN108535761B (en) | 2018-03-19 | 2018-03-19 | Calibration and calibrating device for rotary alpha and beta surface pollution meters |
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| CN201810224454.5A CN108535761B (en) | 2018-03-19 | 2018-03-19 | Calibration and calibrating device for rotary alpha and beta surface pollution meters |
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| CN108535761B true CN108535761B (en) | 2020-11-13 |
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| CN109061717B (en) * | 2018-08-01 | 2021-11-02 | 中国船舶重工集团公司第七一九研究所 | Nuclear radiation scale laboratory one-key calibration control system and control method thereof |
| CN109932745B (en) * | 2019-04-15 | 2020-08-21 | 中国原子能科学研究院 | Universal environment and place radiation monitoring instrument verification support |
| CN110703306B (en) * | 2019-10-11 | 2021-04-23 | 四川轻化工大学 | Alpha radioactive sample measuring tray device capable of rotating angle and translating |
| CN110988972B (en) * | 2019-10-12 | 2022-10-21 | 中国辐射防护研究院 | High-precision three-dimensional portable surface pollution instrument calibrating device |
| CN111025378B (en) * | 2019-11-01 | 2022-06-03 | 浙江恒达仪器仪表股份有限公司 | Full-automatic calibrating device and method for surface pollution instrument |
| CN110941008A (en) * | 2019-12-17 | 2020-03-31 | 中国原子能科学研究院 | Portable detection device for α and β surface pollution meters |
| FR3115370B1 (en) * | 2020-10-16 | 2022-10-07 | Commissariat Energie Atomique | Device for calibrating a ground surface contamination detector and contamination detection system comprising such a calibration device |
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| CN203587809U (en) * | 2013-12-05 | 2014-05-07 | 中科宇图天下科技有限公司 | Nuclear and radiation emergency monitoring vehicle and nuclear and radiation emergency monitoring system |
| CN204287496U (en) * | 2014-12-31 | 2015-04-22 | 刘志宏 | α, β surface contamination detection instrument automatic Verification/calibration/pick-up unit |
| CN105319574A (en) * | 2015-11-16 | 2016-02-10 | 中国原子能科学研究院 | An alpha and beta pulse discriminating method |
| CN107390254B (en) * | 2016-05-16 | 2021-12-17 | 中国辐射防护研究院 | High-precision positioning device and method of distance-adjustable calibration device |
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