CN113640859A - Multi-parameter measuring system for testing environmental adaptability of radiation dosimeter - Google Patents
Multi-parameter measuring system for testing environmental adaptability of radiation dosimeter Download PDFInfo
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- 230000007613 environmental effect Effects 0.000 title claims abstract description 63
- 238000005259 measurement Methods 0.000 claims description 26
- 238000010971 suitability test Methods 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 15
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- 230000005865 ionizing radiation Effects 0.000 description 3
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- 229910001080 W alloy Inorganic materials 0.000 description 2
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- G—PHYSICS
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
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Abstract
The invention relates to a multi-parameter measuring system for testing environmental adaptability of a radiation dosimeter, belonging to the technical field of environmental adaptability and reliability testing. The measuring system provided by the invention can realize the radiation performance parameter test of the nuclear radiation dosimeter under the complex environment condition, and improve the environmental adaptability and reliability of the radiation dosimeter.
Description
Technical Field
The invention belongs to the technical field of environmental adaptability and reliability testing, and particularly relates to a multi-parameter measuring system for environmental adaptability testing of a radiation dosimeter.
Background
Environmental suitability and reliability are both important quality characteristics of a product. Environmental compatibility is the ability of a device or product to perform all of its functions and capabilities without being compromised under the various environments that the conditions of storage, transport, and use of the device or product over its life cycle are expected to encounter. The reliability refers to the capability of the product to complete the specified functions under the specified conditions and within the specified time, and is closely related to the stress state of the external environment and the requirements on the functions of the product.
With the wide application of nuclear science and nuclear technology in the fields of military, national defense industry, scientific research, industrial production and the like, the detection and measurement of nuclear radiation always accompany the same, and are also one of the bases of nuclear science and technology application, and the detection and measurement of nuclear radiation always cannot be separated from various nuclear instruments and nuclear radiation detectors. In order to improve the performance and quality of nuclear instruments and nuclear radiation detectors, to better serve and ensure the wide application of nuclear science and nuclear technology, tests and experimental work for the performance and quality of nuclear instruments and nuclear radiation detectors need to be developed.
In order to be able to fully understand and verify the various environmental conditions that may be encountered by nuclear instruments and nuclear radiation detectors during the design, production, transportation, storage and life cycles and their impact on the instrumentation, environmental suitability tests need to be developed. In particular, some instruments or detectors are subjected to harsh and complex environmental conditions, including not only special use environments such as reactor cores, downhole, underwater, etc., but also extreme environmental conditions such as high radioactivity, high/low pressure, water pressure, etc. Some instruments or detectors are extremely sensitive to temperature changes, which are easily damaged by changes in environmental conditions. The environmental application capacity of the nuclear radiation instrument can be effectively known by developing environmental adaptability and reliability tests, and the method plays an important role in improving the performance and environmental adaptability of the nuclear radiation instrument. At present, the environmental test work of nuclear instruments and nuclear radiation detectors under various environmental conditions and complex environmental conditions is not started, so that the method plays an important role in carrying out the environmental adaptability test of the nuclear radiation instrument. Various defects of related products in the links of design, manufacture and the like can be exposed through an environmental test, so that the adaptability of the products to various environments is verified, and the performance of the products in the using process is predicted. Therefore, the method has important significance for improving the environmental adaptability and reliability of products.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a multi-parameter measuring system for testing the environmental adaptability of a radiation dosimeter, which can realize the radiation performance parameter test of the nuclear radiation dosimeter under the complex environmental condition and improve the environmental adaptability and reliability of the radiation dosimeter.
In order to achieve the above purposes, the invention adopts a technical scheme that:
the multi-parameter measuring system for testing the environmental adaptability of the radiation dosimeter comprises a temperature and humidity test box and a portable ray irradiation device, wherein the portable ray irradiation device is installed on a high-precision positioning rack, an instrument to be tested is fixed on a fixing mechanism, the instrument to be tested is positioned on a central axis of a ray reference radiation field generated by the portable ray irradiation device and is a set distance away from the portable ray irradiation device, and the instrument to be tested and the fixing mechanism are arranged in the temperature and humidity test box.
Further, as mentioned above, the multi-parameter measurement system for environmental suitability test of a radiation dosimeter further comprises a vibration table, the fixing mechanism is installed on the vibration table, and the vibration table is arranged in the temperature and humidity test box.
Further, as for the multi-parameter measuring system for the environment adaptability test of the radiation dosimeter, a laser horizontal line projector is further arranged on the shell of the portable ray irradiation device and used for realizing the accurate positioning of the instrument to be tested.
Further, according to the multi-parameter measurement system for environmental suitability test of a radiation dosimeter, the temperature and humidity test chamber is a small temperature and humidity test chamber or a walk-in temperature and humidity test chamber.
Further, according to the multi-parameter measurement system for environmental suitability test of a radiation dosimeter, the small-sized temperature and humidity test chamber has an entrance window, and a reference radiation field of radiation generated by the portable radiation irradiation device enters the small-sized temperature and humidity test chamber from the entrance window.
Further, according to the multi-parameter measurement system for environmental suitability test of a radiation dosimeter as described above, when the type of the temperature and humidity test chamber is a walk-in temperature and humidity test chamber, the portable radiation irradiation device and the high-precision positioning rack are also located in the walk-in temperature and humidity test chamber.
Further, the multi-parameter measuring system for the environmental suitability test of the radiation dosimeter as described above, wherein the portable radiation irradiation device is a portable X-ray irradiation device or a portable gamma-ray irradiation device.
Further, according to the multi-parameter measuring system for the environment adaptability test of the radiation dosimeter, the X-ray energy range of the portable X-ray irradiation device is 10kV to 650kV, and the air specific release kinetic energy rate is 0.5 mu Gy/h to 1 Gy/h; the gamma ray energy of the portable gamma ray irradiation device is 662keV @ Cs-137 and 1250keV @ Co-60, and the air specific release kinetic energy rate ranges from 0.5 mu Gy/h to 100 mGy/h.
Further, according to the multi-parameter measurement system for the environmental adaptability test of the radiation dosimeter, the temperature variation range of the temperature and humidity test box is-55-200 ℃, the humidity variation range is 10-98% RH, and the temperature change rate range is 5-15 ℃/min.
Further, a multiparameter measuring system for environmental suitability testing of a radiation dosimeter as described above, said systemThe vibration mode of the vibration table is sinusoidal vibration, and the maximum acceleration is 1000m/s2The maximum load is 5000kg, and the frequency variation range is 1 Hz-2000 Hz.
The measuring system has the following remarkable technical effects:
the multi-parameter measuring system for the environment adaptability test of the radiation dosimeter can be used for carrying out environment adaptability and reliability test and detection work on a nuclear instrument and a nuclear radiation detector, and can remarkably improve the performance index and the reliability index of a product, thereby verifying the adaptability of the product to various environments and predicting the performance of the product in the using process. The method has important significance for fully mastering the environmental adaptability and reliability of the nuclear instrument and the nuclear radiation detector and improving the environmental adaptability and reliability of products.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a multi-parameter measurement system for environmental suitability testing of a radiation dosimeter according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of a multi-parameter measurement system for environmental suitability testing of a radiation dosimeter according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of a multi-parameter measurement system for environmental suitability testing of a radiation dosimeter according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of a multi-parameter measurement system for environmental suitability test of a radiation dosimeter according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a portable X-ray irradiation apparatus in a multi-parameter measurement system for environmental suitability testing of a radiation dosimeter according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a portable gamma-ray irradiation device in a multi-parameter measurement system for environmental suitability test of a radiation dosimeter according to an embodiment of the present invention;
wherein, 1-temperature and humidity test chamber; 2-a portable radiation exposure device; 3-a vibration table; 4-high precision positioning of the gantry; 5-a fixing mechanism; 6-laser horizontal line projector.
Detailed Description
The multi-parameter measuring system for the environment adaptability test of the radiation dosimeter comprises two major types, one type is a three-comprehensive measuring system, and the other type is a four-comprehensive measuring system, wherein the three-comprehensive measuring system is used for testing the influence of temperature-humidity environment condition change on ionizing radiation response performance and evaluating the influence of ionizing radiation-temperature-humidity on the environment adaptability and reliability of the radiation dosimeter; the four comprehensive measurement systems are used for testing the influence of temperature-humidity-vibration environmental condition changes on the response performance of the radiation dosimeter and evaluating the influence of radiation-temperature-humidity-vibration on the environmental adaptability and reliability of the radiation dosimeter.
The invention is further described with reference to specific embodiments and drawings attached to the description.
Example one
Fig. 1 is a schematic structural diagram of a first embodiment of a three-integrated measurement system in a multi-parameter measurement system for environmental suitability test of a radiation dosimeter, which is used for testing the influence of temperature-humidity environmental condition change on ionizing radiation response performance. In the embodiment, the three-integrated measuring system mainly comprises a temperature and humidity test box 1 and a portable ray irradiation device 2, wherein the portable ray irradiation device 2 is arranged on a high-precision positioning rack 4, an instrument to be tested is fixed on a fixing mechanism 5, and the instrument to be tested and the fixing mechanism 5 are arranged in the humidity test box 1; a ray reference radiation field generated by the portable ray irradiation device 2 enters the internal space of the humidity test box 1 from an entrance window of the temperature and humidity test box 1, an instrument to be tested is positioned on the central axis of the radiation field, and the distance from the portable ray irradiation device 2 to the portable ray irradiation device is adjustable within the range of 0.5-5 m.
The shell of the portable ray irradiation device 2 is also provided with a laser horizontal line projector 6 for realizing the accurate positioning of the instrument to be tested, ensuring that the instrument to be tested is positioned on the central axis of the radiation field, and simultaneously determining the distance from the reference point of the instrument to be tested to the portable ray irradiation device 2.
The main technical parameters of the temperature and humidity test chamber 1 are as follows: the temperature variation range is-55-200 ℃, the humidity variation range is 10-98% RH, the temperature variation speed range is 5-15 ℃/min, and the internal dimension is not less than 0.3m multiplied by 0.3 m.
The portable radiation irradiation device 2 includes two types of portable X-ray irradiation devices and portable gamma-ray irradiation devices, and the structures and functions of the two types of irradiation devices are described below.
Fig. 5 shows a schematic structural diagram of a portable X-ray irradiation device, which comprises a shield, an X-ray machine, a beam limiting diaphragm, an additional filtering device, a beam monitoring device, a laser range finder, a laser positioning instrument, a control system and the like, wherein the X-ray machine is fixed in a cavity inside the shield and comprises an X-ray tube, a high voltage generator, a low voltage cable and a control unit, the voltage range of the X-ray tube is 10 kV-650 kV, and the adjustment step pitch is 1 kV; the tube current is 0.5-10 mA, and the step pitch is adjusted to be 0.1 mA; the air kerma rate is in the range of 0.5 mu Gy/h-1 Gy/h; the focus of the X-ray tube is positioned on the axis of the conical opening of the beam limiting diaphragm, and the X-ray generated at the focus is collimated by the beam limiting diaphragm to form a uniform X-ray reference radiation field;
the beam limiting diaphragm is positioned on one side of the X-ray outlet direction and consists of three lead collimating diaphragms, the field angle is adjustable within the range of 4-14 degrees, and the beam limiting diaphragm can ensure the uniformity of a radiation field and reduce the influence of scattered radiation;
the X-ray tube is positioned in a cavity inside the shield body, the shield body is provided with an opening at the focus position of the X-ray tube, the opening is provided with a shutter and used for safety interlocking of the device, once an emergency happens, the irradiation device is closed in time, and the shield body is composed of lead and tungsten alloy and used for reducing the radiation dose leaked;
the additional filtering device is positioned outside the beam limiting diaphragm and is made of one or more of Pb, Sn, Cu and Al; when the materials are various, the additional filtering device is of a laminated structure.
Fig. 6 shows a schematic structural diagram of a portable gamma-ray irradiation device, which mainly comprises a scattering cavity, a shielding box, a radioactive source carrier, a collimation diaphragm, a support and the like, wherein the radioactive source is positioned at the center of the scattering cavity during irradiation, and gamma rays generated by the radioactive source form a uniform reference radiation field after being collimated and molded by the collimation diaphragm and are used for the field calibration work of the fixed environmental radiation monitor. The scattering cavity is used for reducing back scattering of the shielding box, and the collimating diaphragm is made of tungsten alloy and used for generating parallel light beams; the radioactive source is placed in the aluminum alloy source box, the shutter of the irradiation device adopts a liftable design, and the irradiation is completed by matching with a positioning device at the top of the device when the device is used. The irradiation device is matched with radioactive sources of Cs-137 and Co-60 isotopes with different activities, the energy of gamma rays is 662keV @ Cs-137 and 1250keV @ Co-60, and the air specific kinetic energy rate ranges from 0.5 mu Gy/h to 100 mGy/h.
Example two
Fig. 2 shows a schematic structural diagram of a second embodiment of a triple integrated measurement system for performing a test of the influence of temperature-humidity environmental condition changes on ionizing radiation response performance. In the embodiment, the three-integrated measurement system mainly comprises a temperature and humidity test box 1 and a portable ray irradiation device 2, wherein the temperature and humidity test box 1 is a walk-in temperature and humidity test box, the portable ray irradiation device 2 is installed on a high-precision positioning rack 4, an instrument to be tested is fixed on a fixing mechanism 5, and the portable ray irradiation device 2, the high-precision positioning rack 4, the instrument to be tested and the fixing mechanism 5 are integrally placed in the temperature and humidity test box 1; the portable ray irradiation device 2 generates a ray reference radiation field, and an instrument to be tested is positioned on the central axis of the radiation field; the shell of the portable ray irradiation device 2 is also provided with a laser horizontal demarcation device 6 for realizing the accurate positioning of the instrument to be tested.
Except for the internal size of the walk-in temperature and humidity test chamber, other technical parameters are the same as those of the first embodiment.
The portable X-ray irradiation device and the portable gamma-ray irradiation device have the same structure and technical parameters as those of the first embodiment, and therefore, they will not be described in detail herein.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a third embodiment of a four-integrated measurement system in the multi-parameter measurement system for environmental suitability test of a radiation dosimeter, according to the present invention, where the test system is used to perform a test on an influence of a temperature-humidity-vibration environmental condition change on a response performance of the radiation dosimeter. In the embodiment, the four-comprehensive measurement system mainly comprises a temperature and humidity test box 1, a portable ray irradiation device 2 and a vibration table 3, wherein the portable ray irradiation device 2 is arranged on a high-precision positioning rack 4, an instrument to be tested is fixed on a fixing mechanism 5, the fixing mechanism 5 is arranged on the vibration table 3, and the instrument to be tested, the fixing mechanism 5 and the vibration table 3 are arranged in the humidity test box 1; a ray reference radiation field generated by the portable ray irradiation device 2 enters the internal space of the humidity test box 1 from an entrance window of the temperature and humidity test box 1, and an instrument to be tested is positioned on the central axis of the radiation field; the shell of the portable ray irradiation device 2 is also provided with a laser horizontal demarcation device 6 for realizing the accurate positioning of the instrument to be tested.
The main technical parameters of the vibration table 3 are as follows: the vibration mode is sinusoidal vibration, and the maximum acceleration is 1000m/s2The maximum load is 5000kg, and the frequency range is 1 Hz-2000 Hz.
The structure and technical parameters of the temperature and humidity test chamber 1, the portable X-ray irradiation device and the portable gamma-ray irradiation device are the same as those of the first embodiment, and therefore, the detailed description thereof is omitted.
Example four
Fig. 4 shows a schematic structural diagram of a fourth embodiment of a four-integrated measurement system for performing a test of the effect of temperature-humidity-vibration environmental condition changes on the response performance of a radiation dosimeter. In the embodiment, the four-integrated measurement system mainly comprises a temperature and humidity test box 1, a portable ray irradiation device 2 and a vibration table 3, wherein the temperature and humidity test box 1 is a walk-in temperature and humidity test box, the portable ray irradiation device 2 is installed on a high-precision positioning rack 4, an instrument to be tested is fixed on a fixing mechanism 5, the fixing mechanism 5 is installed on the vibration table 3, and the portable ray irradiation device 2, the high-precision positioning rack 4, the instrument to be tested, the fixing mechanism 5 and the vibration table 3 are integrally placed in the temperature and humidity test box 1; the portable ray irradiation device 2 generates a ray reference radiation field, and an instrument to be tested is positioned on the central axis of the radiation field; the shell of the portable ray irradiation device 2 is also provided with a laser horizontal demarcation device 6 for realizing the accurate positioning of the instrument to be tested.
The structures and technical parameters of the portable X-ray irradiation device and the portable gamma-ray irradiation device are the same as those of the first embodiment, the main technical parameters of the walk-in temperature and humidity test box are the same as those of the second embodiment, and the main technical parameters of the vibration table 3 are the same as those of the third embodiment, so that detailed description is omitted here.
The application method of the multi-parameter measurement system for the radiation dosimeter environment adaptability test provided by the embodiment of the invention comprises the following steps:
according to the test requirement, the radiation dosage instrument to be tested is placed in a position, which is away from the portable X/gamma ray irradiation device, of the three comprehensive test system or the four comprehensive test system by a certain distance, the temperature and the humidity are adjusted, the device is kept still for 90 minutes under different temperature and humidity conditions, the temperature and the humidity of the internal device of the radiation dosage instrument are guaranteed to be balanced, then the test is started, and the radiation dosage rate received at the reference point under different temperature and humidity conditions or under temperature, humidity and vibration conditions is obtained.
The following table shows the measurement result of a gamma radiation dosimeter in a three-integrated test system at a distance of 1m from a portable gamma ray irradiation device, and the reference value of the dosage rate at the position is 120 mu Gy/h.
The multi-parameter measuring system for the environment adaptability test of the radiation dosimeter can be used for carrying out environment adaptability and reliability test and detection work on a nuclear instrument and a nuclear radiation detector, and can remarkably improve the performance index and the reliability index of a product, thereby verifying the adaptability of the product to various environments and predicting the performance of the product in the using process. The method has important significance for fully mastering the environmental adaptability and reliability of the nuclear instrument and the nuclear radiation detector and improving the environmental adaptability and reliability of products.
The above-described embodiments are merely illustrative of the present invention, which may be embodied in other specific forms or in other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention should be indicated by the appended claims, and any changes that are equivalent to the intent and scope of the claims should be construed to be included therein.
Claims (10)
1. The utility model provides a multi-parameter measurement system for radiation dosage appearance environmental suitability tests, its characterized in that, includes temperature and humidity test case (1) and portable ray irradiation device (2), portable ray irradiation device (2) are installed on high accuracy location rack (4), and the examination of awaiting measuring instrument is fixed on fixed establishment (5), the examination of awaiting measuring instrument is located on the axis of the ray reference radiation field that portable ray irradiation device (2) produced and apart from portable ray irradiation device (2) set distance, the examination of measuring instrument with fixed establishment (5) set up in temperature and humidity test case (1).
2. The multiparameter measuring system for environmental suitability test of a radiation dosimeter according to claim 1, further comprising a vibration table (3), wherein the fixing mechanism (5) is mounted on the vibration table (3), and the vibration table (3) is disposed in the temperature and humidity test chamber (1).
3. Multiparameter measuring system for environmental suitability testing of a radiation dosimeter as in claim 1 or 2, wherein a laser level line projector (6) is further provided on the housing of the portable radiation irradiation device (2) for accurate positioning of the instrument to be tested.
4. The multiparameter measuring system for environmental suitability test of a radiation dosimeter according to claim 1, wherein the type of the temperature and humidity test chamber (1) is a small-sized temperature and humidity test chamber or a walk-in temperature and humidity test chamber.
5. The multiparameter measuring system for environmental suitability test of a radiation dosimeter according to claim 4, wherein the small-sized temperature and humidity test chamber has an entrance window, and the reference radiation field of the radiation generated by the portable radiation irradiation device (2) enters the small-sized temperature and humidity test chamber through the entrance window.
6. The multiparameter measuring system for environmental suitability test of a radiation dosimeter according to claim 4, wherein when the temperature and humidity test chamber (1) is of the walk-in type, the portable radiation irradiation device (2) and the high-precision positioning stage (4) are also located in the walk-in type.
7. Multiparameter measuring system for environmental suitability testing of a radiation dosimeter according to claim 1 or 2, wherein the portable radiation exposure device (2) is a portable X-ray exposure device or a portable gamma-ray exposure device.
8. The multiparameter measuring system for dosimeter environmental suitability test according to claim 7, wherein the portable X-ray irradiation device has an X-ray energy range of 10kV to 650kV, and an air kerma rate range of 0.5 μ Gy/h to 1 Gy/h; the gamma ray energy of the portable gamma ray irradiation device is 662keV @ Cs-137 and 1250keV @ Co-60, and the air specific release kinetic energy rate ranges from 0.5 mu Gy/h to 100 mGy/h.
9. The multiparameter measuring system for environmental suitability test of a radiation dose apparatus as defined in any one of claims 4 to 6, wherein the temperature variation range of the temperature and humidity test chamber (1) is-55 ℃ to 200 ℃, the humidity variation range is 10% to 98% RH, and the temperature variation rate range is 5 ℃/min to 15 ℃/min.
10. According toMultiparameter measuring system for environmental suitability testing of a radiation dosimeter as claimed in claim 2, wherein the vibration mode of the vibration table (3) is sinusoidal vibration with a maximum acceleration of 1000m/s2The maximum load is 5000kg, and the frequency variation range is 1 Hz-2000 Hz.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114063143A (en) * | 2021-11-24 | 2022-02-18 | 中国原子能科学研究院 | Radiation dosimeter calibration device, system and method |
| CN114442140A (en) * | 2022-01-04 | 2022-05-06 | 成都理工大学 | Variable radiation field multipurpose irradiation calibration device and use method |
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