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An alarm system and method based on grain radioactive detection

An alarm system and radioactivity technology, applied in the field of alarm systems based on food radioactivity detection, can solve the problems of monitoring equipment design and manufacturing obstacles, low detection accuracy, and inability to solve detection difficulties

Active Publication Date: 2021-06-11
NAT INST FOR RADIOLOGICAL PROTECTION & NUCLEAR SAFETY CHINESE CENT FOR DISEASE CONTROL & PREVENTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Most grains are weak radioactive sources, and the rays produced by them are difficult to detect and capture, which brings great troubles to the detection of grain radioactivity
Moreover, there are many kinds of grains, and different grains have different detection difficulties, which once again hinders the design and manufacture of grain radiation monitoring equipment.
After careful exploration, the inventor of the present invention found that even if the above-mentioned prior art is combined, the technical problems of high detection difficulty and low detection accuracy caused by the superimposed background radiation of weak radioactive detection of grains cannot be solved

Method used

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  • An alarm system and method based on grain radioactive detection
  • An alarm system and method based on grain radioactive detection
  • An alarm system and method based on grain radioactive detection

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Embodiment 1

[0031] This embodiment provides an alarm system based on grain radioactivity. The alarm system can configure a detection mode suitable for the grain type according to the type of grain before the grain enters the monitoring platform 5, so that the alarm system can give an alarm according to the measured values ​​obtained in different detection modes.

[0032] First of all, the background radiation itself is very small, and the radiation background value has a normal fluctuation range. When judging the additional radiation brought by the grain, the measured value detected by the detection equipment will change with the rotation; if the difference in the measured value is collected continuously, because the radiation in the grain to be inspected and the background radiation have an additive effect, The out-of-range data collected at very few time points does not mean that the radiation exceeds the standard, and the sometimes too low value does not mean that it is safe. Therefor...

Embodiment 2

[0052] This embodiment may be a further improvement and / or supplement to Embodiment 1, and repeated content will not be repeated here. This embodiment discloses that the whole and / or part of the preferred implementation manners of other embodiments may be used as a supplement to this embodiment under the condition that no conflict or contradiction is caused.

[0053] This embodiment discloses an alarm system based on grain radioactivity detection, at least aimed at solving the technical problem of low detection rate of weak grain radioactivity, which includes a detection device 1 , a computing device 2 and an alarm device 3 .

[0054] Specifically, the detecting device 1 may be, for example, NaI detecting device, HPGe, CsI, CdTe and the like. The detection device 1 is composed of a large-area plastic scintillator and a photomultiplier tube. Two photomultiplier tubes are preferably used, which are coupled with the plastic scintillator using silicone oil. Compared with single ...

Embodiment 3

[0086] This embodiment provides an alarm device based on grain radioactivity detection. In the case of no conflict or contradiction, the whole and / or part of the content of the preferred implementations of other embodiments may serve as supplements to this embodiment.

[0087] The alarm device can configure a detection working mode suitable for the grain type according to the grain type before the grain enters the monitoring platform 5, so that the alarm system can alarm according to the measured values ​​obtained in different detection working modes

[0088] The alarm device includes sorting equipment, detection equipment 1, computing equipment 2 and alarm equipment 3.

[0089] The sorting device can obtain the grain type used to configure the detection working mode of the detection platform 5 before the detection device 1 detects the grain, and the grain type and the detection working mode are stored in the computing device 2 in a corresponding manner.

[0090] Detection eq...

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Abstract

The invention relates to an alarm system and method based on grain radioactivity detection, comprising: detection equipment, computing equipment and alarm equipment. When the packaging part is on the detection platform, the detection device can detect the packaging part and obtain at least one measurement value when the packaging part assumes the inspection state and within a corresponding time interval of the inspection state that the packaging part assumes, so that The calculation device can combine a measurement value into a characteristic value after the detection device completes the detection of the packaging part presenting all inspection states, which is used for the calculation device to compare with the preset characteristic threshold to generate an alarm signal.

Description

technical field [0001] The invention relates to the technical field of food safety, in particular to an alarm system and method based on food radioactivity detection. Background technique [0002] Because the food contains less radioactive nuclides, it belongs to the background radioactive level. Therefore, it is difficult to use the high radioactivity detection or monitoring system used in nuclear power plants for its detection or monitoring instruments. At present, the objects to be measured are screened and judged based on the lower measurement limit of the detection or monitoring system, that is, the lower limit of the measurement is used as a reference value. When the activity concentration of the object to be measured exceeds the set threshold, an electronic switch directly activates the alarm. [0003] For example, a radioactive substance monitoring system disclosed in Chinese Patent Publication No. CN206876893U. The system includes: a radioactive material detection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07C5/346G01T1/167
CPCB07C5/346B07C2501/0081G01T1/167
Inventor 张京拓飞李则书杨宝路李文红周强
Owner NAT INST FOR RADIOLOGICAL PROTECTION & NUCLEAR SAFETY CHINESE CENT FOR DISEASE CONTROL & PREVENTION
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