SU452278A1 - Calibration method of neutron moisture meters - Google Patents
Calibration method of neutron moisture metersInfo
- Publication number
- SU452278A1 SU452278A1 SU1766734A SU1766734A SU452278A1 SU 452278 A1 SU452278 A1 SU 452278A1 SU 1766734 A SU1766734 A SU 1766734A SU 1766734 A SU1766734 A SU 1766734A SU 452278 A1 SU452278 A1 SU 452278A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- moisture
- neutron
- calibration method
- moisture meters
- neutron moisture
- Prior art date
Links
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
Description
1one
Изобретение может быть использовано дл калибровки нейтронных влагомеров, примен емых дл контрол влажности грунтов и других материалов в строительстве, сельском хоз йстве, металлургии, горном деле и т. д. The invention can be used to calibrate neutron moisture meters used to control the moisture content of soils and other materials in construction, agriculture, metallurgy, mining, etc.
Известны способы калибровки нейтронных влагомеров путем определени скорости счета медленных нейтронов в стандартном замедлителе нейтронов и в искусственных эквивалентах влажности и построени по их отношению калибровочных графиков. В качестве искусственных эквивалентов влажности можно использовать материалы, содержащие в своем химическом составе преобладающее количество дер водорода, например парафин,Methods are known for calibrating neutron moisture meters by determining the counting rate of slow neutrons in a standard neutron moderator and in artificial moisture equivalents and plotting calibration graphs from their ratio. As artificial equivalents of moisture, you can use materials that contain in their chemical composition the predominant amount of hydrogen nuclei, for example paraffin,
Однако при использовании известного способа необходимо создание нескольких искусственных эквивалентов влажности, что усложн ет способ.However, when using the known method, it is necessary to create several artificial equivalents of moisture, which complicates the method.
Цель изобретени - упрощение способа калибровки нейтронных влагомеров (использование дл калибровки одного искусственного эквивалента влажности, например воды).The purpose of the invention is to simplify the method of calibration of neutron moisture meters (use for calibration of one artificial equivalent of moisture, such as water).
Цель достигаетс использованием дл калибровки нейтронного влагомера зависимости скорости счета медленных нейтронов в водеThe goal is achieved by using for calibration of a neutron moisture meter the dependence of the count rate of slow neutrons in water.
от рассто ни между источником и детектором нейтронов.the distance between the source and the neutron detector.
Зависимость скорости счета медленных нейтронов в воде от расто ни источником и детектором, например, дл прибора НИВ-1, получают экспериментально. Затем, сравнива полученную зависимость с калибровочным графиком дл прибора НИВ-1, наход т график соответстви рассто ний между источником и детектором нейтронов значени м объемной влажности грунта.The dependence of the count rate of slow neutrons in water on a source or detector, for example, for an NIV-1 instrument, is obtained experimentally. Then, comparing the obtained dependence with the calibration graph for the NIV-1 device, one finds the graph of the correspondence of the distance between the source and the neutron detector to the values of the bulk moisture of the soil.
В результате получают калибровочный график зависимости скорости счета медленных нейтронов от объемной влажности.The result is a calibration graph of the counting rate of slow neutrons from bulk moisture.
Предмет изобретени Subject invention
Способ калибровки нейтронных влагомеров , включающий операции определени скорости счета медленных нейтронов в стандартном замедлителе и в искусственных эквивалентах влажности и построени по их отношению калибровочных кривых, отличающ и и с тем, что, с целью упрощени способа , искусственные эквиваленты влажности получают путем изменени рассто ни источник-детектор иейтронов.The method of calibrating neutron moisture meters, including the operations of determining the count rate of slow neutrons in a standard moderator and artificial moisture equivalents and constructing calibration curves by their ratio, is also distinguished by the fact that, in order to simplify the method, artificial moisture equivalents are obtained by changing the source -detector and neutrons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1766734A SU452278A1 (en) | 1972-03-31 | 1972-03-31 | Calibration method of neutron moisture meters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1766734A SU452278A1 (en) | 1972-03-31 | 1972-03-31 | Calibration method of neutron moisture meters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU452278A1 true SU452278A1 (en) | 1975-10-05 |
Family
ID=20508788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1766734A SU452278A1 (en) | 1972-03-31 | 1972-03-31 | Calibration method of neutron moisture meters |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU452278A1 (en) |
-
1972
- 1972-03-31 SU SU1766734A patent/SU452278A1/en active
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