CN107390254B - High-precision positioning device and method of distance-adjustable calibration device - Google Patents
High-precision positioning device and method of distance-adjustable calibration device Download PDFInfo
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- CN107390254B CN107390254B CN201610321169.6A CN201610321169A CN107390254B CN 107390254 B CN107390254 B CN 107390254B CN 201610321169 A CN201610321169 A CN 201610321169A CN 107390254 B CN107390254 B CN 107390254B
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- 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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Abstract
The invention relates to a high-precision positioning device and method of a distance adjustable calibration device. The device comprises one or more distance sensors, a singlechip and a liquid crystal module; the distance sensor is connected with the single chip microcomputer, and the single chip microcomputer is integrated with the liquid crystal module; the bottom flat plate of the adjustable calibration device is provided with a plurality of holes, and the distance sensor is placed right below the holes; the distance sensor measures the distance between the detector or the radioactive source placed on the calibrating device and the distance sensor and transmits the distance to the single chip microcomputer, and the single chip microcomputer drives the liquid crystal module to display the distance. The invention adopts the distance sensor and develops the distance control program, thereby ensuring the accuracy of the distance between the sensitive area and the radioactive source for calibrating the surface pollution meter.
Description
Technical Field
The invention particularly relates to a high-precision positioning device and a high-precision positioning method for a distance-adjustable calibration device, which are used for a surface pollution meter and belong to the technical field of radiation monitoring, surface pollution and radiation protection.
Background
In nuclear power plants, nuclear fuel production plants, post-treatment plants, etc., it is often necessary to use surface contamination meters for measurements to ensure that the surfaces of the objects are free of radioactive contamination. And the calibration of the surface pollution instrument can ensure the reliability of the measuring result and the consistency of the measuring results of the surface pollution instruments with different specifications.
The conventional surface pollution meter calibrating device is generally of two types, namely a fixed distance type calibrating device and an adjustable distance type calibrating device. The two have the advantages and the disadvantages, the former is convenient to operate, and the latter can ensure the accurate fixed value of the distance between the protective grid of the sensitive area of different detectors and the calibration radioactive source of the surface contamination meter by adjusting the distance.
However, the level at which the protective grids of the sensitive areas at the bottom of many surface-polluting instruments are located is not flush with the lowest edge of the side view of the whole instrument, which results in a large error using the conventional method for measuring distance.
Disclosure of Invention
Aiming at the phenomenon that the distance positioning is inaccurate when the traditional surface pollution meter calibrating device calibrates certain surface pollution meters, the distance sensor is combined with distance control software to ensure the accuracy of the distance between the protective grid of the sensitive area of the detector and the sensitive area of the radioactive source.
The invention provides a high-precision positioning device of a distance adjustable calibration device, which is used for a surface pollution instrument and comprises a distance sensor, a singlechip and a liquid crystal module; the distance sensor is connected with the single chip microcomputer, and the single chip microcomputer is integrated with the liquid crystal module;
the bottom flat plate of the adjustable calibration device is provided with a plurality of holes, and the distance sensor is placed right below the holes;
the distance sensor measures the distance between the detector or the radioactive source placed on the calibrating device and the distance sensor and transmits the distance to the single chip microcomputer, and the single chip microcomputer drives the liquid crystal module to display the distance.
Further, in the high-precision positioning device of the distance adjustable calibration device, the number of the distance sensors is more than one.
Further, as the high-precision positioning device of the distance adjustable calibration device, the distance sensor is movable.
Further, according to the high-precision positioning device of the distance adjustable calibration device, the single chip microcomputer enables the liquid crystal module to display the distance value between the distance sensor and the detector or the radioactive source in real time.
In addition, the invention also provides a high-precision positioning method of the distance adjustable calibration device using the positioning device, which is used for the surface contamination meter, and the method comprises the following steps:
(1) punching a plurality of holes on a bottom flat plate of a calibration frame of the adjustable calibration device by using a punching device, and placing a movable distance sensor right below the holes in an upward direction;
(2) starting the positioning device, and placing a planar radioactive source for surface contamination calibration on a bottom flat plate of a calibration frame of the calibration device; the liquid crystal module displays that the distance between the radioactive source and the distance sensor is A and the thickness of the known radioactive source is B;
(3) taking away the plane radioactive source, placing the detector on a boss of the calibration frame corresponding to the position of the radioactive source, and displaying the distance between the bottom surface of the detector and the distance sensor to be C, C > (A + B) by the liquid crystal module;
(4) the radioactive source is placed on the original position of a bottom flat plate on a calibration frame of the calibration device, the height of a boss on the calibration frame is continuously adjusted, and thus the distance C- (A + B) between the bottom surface of the detector and the radioactive source is adjusted, so that the distance C- (A + B) meets the requirements of surface pollution verification regulations JJJG 478 and 1996 alpha, beta and gamma surface pollution instruments, and instrument calibration is further carried out.
The invention adopts the distance sensor and develops the distance control program, thereby ensuring the accuracy of the distance between the sensitive area surface protective grid and the radioactive source for calibrating the surface pollution meter.
Drawings
FIG. 1 is a schematic diagram of the present invention for perforating a calibration device of a surface contamination meter.
FIG. 2 is a schematic structural diagram of a high-precision positioning device of the distance adjustable calibration device of the present invention.
FIG. 3 is a schematic diagram illustrating a step of a high-precision positioning method of the distance adjustable calibration apparatus according to the present invention.
FIG. 4 is a schematic diagram of a second step of the high precision positioning method of the distance adjustable calibration apparatus of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in FIG. 1, a punching device is first used to punch a plurality of holes on the bottom plate of the prior adjustable surface contamination meter calibration device 1.
As shown in fig. 2, the present invention provides a high precision positioning device of a distance adjustable calibration device, which comprises one or more distance sensors 2, a single chip 3, and a liquid crystal module 4; the distance sensor is connected with the single chip microcomputer, and the single chip microcomputer integrates the liquid crystal module. One or more precision distance sensors 2 are made to be movably placed right below the holes in the bottom plate of the calibration device 1, in an upward direction. The single chip microcomputer enables the liquid crystal module to display the distance value between the sensor and the detector 6 or the radioactive source 5 placed on the calibration frame of the calibration device in real time.
As shown in fig. 3 and 4, the present invention further provides a high precision positioning method for a distance adjustable calibration device, using the above device, the method includes the following steps:
(1) the positioning device is started, and a plane radioactive source 5 for surface contamination calibration is placed on a bottom flat plate 8 on a calibration frame of the calibration device. The liquid crystal module displays that the distance between the radioactive source and the distance sensor is A. The thickness of the radiation source is known as B.
(2) The planar radiation source is removed and the detector 6 is placed on two bosses 7 of the calibration stand. The liquid crystal module displays that the distance between the bottom surface of the detector and the distance sensor is C, C (A + B).
(3) The radioactive source is placed on a bottom flat plate on a calibration frame of the calibration device, and the height of a boss on the calibration frame is continuously adjusted, so that the distance C- (A + B) between the bottom surface of the detector and the radioactive source is adjusted to meet the requirements of surface pollution calibration regulations JJJG 478 and 1996 alpha, beta and gamma surface pollution instruments, and further the instrument calibration is carried out.
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 (5)
1. The utility model provides a calibrating device's high accuracy positioner with adjustable distance for surface contamination appearance, its characterized in that:
the positioning device comprises a distance sensor, a single chip microcomputer and a liquid crystal module; the distance sensor is connected with the single chip microcomputer, and the single chip microcomputer is integrated with the liquid crystal module;
the bottom flat plate of the adjustable calibration device is provided with a plurality of holes, and the distance sensor is placed right below the holes;
the distance sensor measures the distance between a detector or a radioactive source placed on the calibrating device and the distance sensor and transmits the distance to the single chip microcomputer, and the single chip microcomputer drives the liquid crystal module to display the distance;
the distance C between the bottom surface of the detector and the distance sensor is greater than the distance A between the radioactive source and the distance sensor plus the thickness B of the radioactive source.
2. The high-precision positioning apparatus for the distance adjustable calibration apparatus according to claim 1, wherein:
the number of the distance sensors is more than one.
3. The high-precision positioning apparatus for the distance adjustable calibration apparatus according to claim 1, wherein:
the distance sensor is movable.
4. The high-precision positioning apparatus for the distance adjustable calibration apparatus according to claim 1, wherein:
the singlechip-controlled liquid crystal module can display the distance value between the distance sensor and the detector or the radioactive source in real time.
5. A high-precision positioning method using the distance-adjustable calibrating device of any one of claims 1 to 4 for a surface contamination meter, characterized in that:
the method comprises the following steps:
(1) punching a plurality of holes on a bottom flat plate of a calibration frame of the adjustable calibration device by using a punching device, and placing a movable distance sensor right below the holes in an upward direction;
(2) starting the positioning device, and placing a planar radioactive source for surface contamination calibration on a bottom flat plate of a calibration frame of the calibration device; the liquid crystal module displays that the distance between the radioactive source and the distance sensor is A and the thickness of the known radioactive source is B;
(3) taking away the plane radioactive source, placing the detector on a boss of the calibration frame corresponding to the position of the radioactive source, and displaying the distance between the bottom surface of the detector and the distance sensor to be C, C > (A + B) by the liquid crystal module;
(4) the radioactive source is placed on the original position of a bottom flat plate on a calibration frame of the calibration device, the height of a boss on the calibration frame is continuously adjusted, and thus the distance C- (A + B) between the bottom surface of the detector and the radioactive source is adjusted, so that the distance C- (A + B) meets the requirements of surface pollution verification regulations JJJG 478 and 1996 alpha, beta and gamma surface pollution instruments, and instrument calibration is further carried out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610321169.6A CN107390254B (en) | 2016-05-16 | 2016-05-16 | High-precision positioning device and method of distance-adjustable calibration device |
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| CN201610321169.6A CN107390254B (en) | 2016-05-16 | 2016-05-16 | High-precision positioning device and method of distance-adjustable calibration device |
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| CN107390254B true CN107390254B (en) | 2021-12-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535761B (en) * | 2018-03-19 | 2020-11-13 | 中国原子能科学研究院 | Calibration and calibrating device for rotary alpha and beta surface pollution meters |
| 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 |
| CN112068182B (en) * | 2020-09-15 | 2022-05-17 | 中国核动力研究设计院 | Multi-wire proportional chamber-based 4 pi beta-gamma coincidence measurement device and measurement method |
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