CN206740992U - γ absorbed dose rate instrument with soil moisture correction - Google Patents
γ absorbed dose rate instrument with soil moisture correction Download PDFInfo
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- CN206740992U CN206740992U CN201720544166.9U CN201720544166U CN206740992U CN 206740992 U CN206740992 U CN 206740992U CN 201720544166 U CN201720544166 U CN 201720544166U CN 206740992 U CN206740992 U CN 206740992U
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- detector
- strut
- main frame
- absorbed dose
- dose rate
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Abstract
The utility model discloses a kind of γ absorbed dose rate instrument with soil moisture correction, including detector and main frame, the detector includes the detecting head in housing and housing, straight down, top is disposed with photomultiplier and pre-amplification circuit to the detecting head, and detector both sides are respectively equipped with a strut, strut bottom exceedes detector bottom, slide bar is respectively equipped with strut, the slide bar lower surface is respectively fixedly connected with a tensiometer, and the output end of the tensiometer is connected with main frame.The utility model can obtain actual measurement data to detector and be corrected in real time according to humidity, make data in the requirement for more accurately and reliably, meeting sample after humidity correcting and need to being used to compare and judge under the dry condition.
Description
Technical field
It the utility model is related to a kind of nuclear radiation detection technology, more particularly to a kind of γ absorbents with soil moisture correction
Dose rate instrument.
Background technology
With the high speed development of nuclear industry and Application of Nuclear Technology industry, nuclear detection technology is also flourished.Because
Gamma dose rate instrument is mainly used in the measurement to surrounding air absorbed dose rate, has working stability, the spy such as portable, sensitivity is high
Point, it is a kind of important means of environment radiation dose monitoring on the spot, in radiation environmental monitoring, slag radiation dose monitoring etc.
It is widely used.
Disturbing factor suffered by field condition gamma dose measurement is more, such as measures the influence of soil water content.In rainfall
In, moisture is preserved in the hole of soil, soil texture has certain porosity, soil is changed after filling moisture in space
Material composition, when gamma-rays is in the process by soil, scattering, photoelectric cross-section change so that cut its useful effect
Face changes；When gamma-rays is after by soil, the structure for reaching ground power spectrum changes, and then influences gamma dose rate
Measured value, it is impossible to accurately reflect true radiation environment.So the data measured are inaccurate, produced when how to remove measurement
Raw interference, and accurate measurement data can be effectively got in real time, it is that we need to solve the problems, such as.
Utility model content
The purpose of this utility model is that providing one kind solves the above problems, and simple in construction, measurement is convenient, and makes to measure
Data more accurately and reliably with soil moisture correction γ absorbed dose rates instrument and bearing calibration.
To achieve these goals, the technical solution adopted in the utility model is such：A kind of band soil moisture corrects
γ absorbed dose rate instrument, including detector and main frame, the detector, which is used to detecting Radionuclides in Soil, to be produced γ and penetrates
The air absorbed dose of radiation of line, the detector include housing and housing in detecting head, the detecting head straight down, top according to
Secondary to be provided with photomultiplier and pre-amplification circuit, the detecting head output end is after photomultiplier and pre-amplification circuit
Main frame is connected, the detector both sides are respectively equipped with a strut, and the detector both sides are fixedly connected with strut, and strut bottom
More than detector bottom, a level, and the slide bar that can be slided up and down along strut, the slide bar lower surface are respectively equipped with strut
A tensiometer is respectively fixedly connected with, the output end of the tensiometer is connected with main frame.
As preferred：The output end of the main frame connects a PDA data acquisition units, for recording the number of collection main frame output
According to.
As preferred：During the detector crystal detection size be 50 × 50mm plastic scintillator detector, the support
Bar is made with slide bar from metallic aluminum material.
A kind of γ absorbed dose rates instrument with soil moisture correction and bearing calibration, comprise the following steps；
(1) simulation is obtained in the γ absorbed dose rate instrument with soil moisture correction, and detector is in different humidity soil environment
In gamma ray counting, air absorbed dose of radiation is converted into according to instrumental calibration formula；
Specific method is：The pedotheque that a soil moisture is 0% is chosen, the γ of insert band soil moisture correction absorbs
Dose rate instrument, the gamma ray counting of detector is obtained, water content to the soil moisture for repeatedly increasing soil is 50%, is obtained different
Detector gamma ray counting under water content state, and the air being converted into by instrumental calibration formula under different moisture content state is inhaled
Receive close rate；
(2) the correction coefficient C under the conditions of different humidity is solved,
Wherein, DHMeasurement obtains Dose Rate, D when for water content being HdryIt is 0% space-time aspiration for water content
Dosage；
(3) using humidity H as abscissa, correction coefficient C is ordinate, is fitted to water content and correction coefficient C graphs of a relation, and
Following formula is drawn according to the graph of a relation
C=aH+b, (formula 2),
Wherein a, b are the proportionality coefficient drawn by formula；
(4) during actual measurement, distinguished with that tensiometer in the γ absorbed dose rate instrument corrected with soil moisture
Soil moisture to be measured is obtained, and is averaged, soil actual humidity value D as to be measuredH is real, by DH is realBring formula (2) into and calculate reality
The correction coefficient C of humidityIt is real, then by CIt is realBring into formula (1) and calculate actual Dose Rate DDry is real。
Compared with prior art, the utility model has the advantage of：Tensiometer and detector are combined together.One
Aspect, tensiometer can adjust height, be convenient for measuring, and combine respective count of two tensiometers and calculate average value,
Error is reduced with this, so as to synchronize to pedotheque humidity measurement, obtains humidity counting.On the other hand it is then to pass through spy
Survey device to measure pedotheque in real time, the absorbed dose rate for making to measure is transferred on the main frame of the present apparatus.Finally by
Humidity correcting equation to carry out real time correction to Dose Rate, by PDA data acquisition units come the number to correction completion
According to carrying out record collection.
Such benefit is：(1) actual measurement data is caused more accurately and reliably, to meet sample after humidity correcting
The requirement compared and judged need to be used under the dry condition.
(2) after humidity amendment, reduce parameter influence for the analysis of different samples, add making for gamma dose rate instrument
Use scope.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is water content and correction coefficient C graph of a relation.
In figure：1st, housing；2nd, detecting head；3rd, photomultiplier；4th, pre-amplification circuit；5th, strut；6th, slide bar；7th, soil
Hygrometer；8th, PDA data acquisition units.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment 1：Referring to Fig. 1 and Fig. 2, it is a kind of with soil moisture correction γ absorbed dose rate instrument, including detector and
Main frame, the detector are used to detect the gamma-ray air absorbed dose of radiation of Radionuclides in Soil generation, the detector bag
Include the detecting head 2 in housing 1 and housing 1, straight down, top is disposed with photomultiplier 3 and preposition to the detecting head 2
Amplifying circuit 4, the output end of detecting head 2 connect main frame, the detector after photomultiplier 3 and pre-amplification circuit 4
Both sides are respectively equipped with a strut 5, and the detector both sides are fixedly connected with strut 5, and the bottom of strut 5 exceedes detector bottom,
A level, and the slide bar 6 that can be slided up and down along strut 5 are respectively equipped with strut 5, the lower surface of slide bar 6 is fixed respectively to be connected
A tensiometer 7 is connect, the output end of the tensiometer 7 is connected with main frame.The output end of the main frame connects a PDA numbers
According to collector 8, for recording the data of collection main frame output, crystal detection size is 50 × 50mm during the detector plastics
Scintillator detector, the strut 5 are made with slide bar 6 from metallic aluminum material.
The utility model is mainly used in in-situ measurement and produces gamma-ray air absorbed dose of radiation to Radionuclides in Soil,
Do not limited by on-site soil humidity, obtained data are accurately and fast.And measure very convenient.
Wherein, tensiometer 7 and detector are combined together, on the one hand, tensiometer 7 can adjust height, side
Just in the scene insertion of varying environment, and measure, the respective counting of two tensiometers 7 calculates average value, with this
To reduce error, so as to synchronize measurement to pedotheque humidity, obtain humidity and count.
On the other hand, pedotheque is measured in real time by detector, the absorbed dose rate for making to measure is transferred to
On the main frame of the present apparatus.
Main frame gets humidity data, and the data of detector, with reference to following method, by humidity correcting equation come
Real time correction is carried out to Dose Rate, adopted by PDA data acquisition units 8 to carry out record to the data of correction completion
Collection.
Specific method is as follows：
A kind of γ absorbed dose rates instrument with soil moisture correction and bearing calibration, specifically include following steps：
The first step：Obtain correction equation；
(1) simulation is obtained in the γ absorbed dose rate instrument with soil moisture correction, and detector is in different humidity soil environment
In gamma ray counting, air absorbed dose of radiation is converted into according to instrumental calibration formula；
Specific method is：The pedotheque that a soil moisture is 0% is chosen, the γ of insert band soil moisture correction absorbs
Dose rate instrument, the gamma ray counting of detector is obtained, water content to the soil moisture for repeatedly increasing soil is 50%, is obtained different
Detector gamma ray counting under water content state, and the air being converted into by instrumental calibration formula under different moisture content state is inhaled
Receive close rate；
(2) the correction coefficient C under the conditions of different humidity is solved,
Wherein, DHMeasurement obtains Dose Rate, D when for water content being HdryIt is 0% space-time aspiration for water content
Dosage；
(3) using humidity H as abscissa, correction coefficient C is ordinate, is fitted to water content and correction coefficient C graphs of a relation, and
Following formula is drawn according to the graph of a relation
C=aH+b, (formula 2),
Wherein a, b are the proportionality coefficient drawn by formula；
Second step：Actual measurement, and combine correction equation and obtain actual Dose Rate；
(4) during actual measurement, distinguished with that tensiometer 7 in the γ absorbed dose rate instrument corrected with soil moisture
Soil moisture to be measured is obtained, and is averaged, soil actual humidity value D as to be measuredH is real, by DH is realBring formula (2) into and calculate reality
The correction coefficient C of humidityIt is real, then by CIt is realBring into formula (1) and calculate actual Dose Rate DDry is real。
Tensiometer 7 and detector are combined together by the utility model, according to the humidity of soil come tuning detector
The value of actual measurement, reach the purpose for reducing error.
Wherein, detector both sides are respectively equipped with a tensiometer 7, with reference to two 7 respective countings of tensiometer
Average value is calculated, error is reduced with this.
First simulated experiment, it is 0%- according to soil moisture firstly the need of the correction coefficient C under the conditions of calculating different humidity
50%, the correction coefficient C under the conditions of different humidity is obtained, and water content and correction coefficient C graphs of a relation are fitted, according to graph of a relation
Updating formula is obtained, during actual measurement, it is only necessary to the numerical value of detector detection is corrected according to the humidity of actual measurement.Finally by
PDA data acquisition units 8 carry out record collection come the data completed to correction.The utility model is simple in construction, is easy to carry, and real
When the data that measure it is accurate.
Claims (3)
- A kind of 1. γ absorbed dose rate instrument with soil moisture correction, it is characterised in that：Including detector and main frame, the detection Device is used to detect the gamma-ray air absorbed dose of radiation of Radionuclides in Soil generation, and the detector is included in housing and housing Detecting head, straight down, top is disposed with photomultiplier and pre-amplification circuit, the detecting head to the detecting head Output end connects main frame after photomultiplier and pre-amplification circuit, and the detector both sides are respectively equipped with a strut, described Detector both sides are fixedly connected with strut, and strut bottom exceedes detector bottom, and a level, and energy are respectively equipped with strut The slide bar slided up and down along strut, the slide bar lower surface are respectively fixedly connected with a tensiometer, the tensiometer Output end is connected with main frame.
- 2. the γ absorbed dose rate instrument according to claim 1 with soil moisture correction, it is characterised in that：The main frame Output end connects a PDA data acquisition units, for recording the data of collection main frame output.
- 3. the γ absorbed dose rate instrument according to claim 1 with soil moisture correction, it is characterised in that：The detector When crystal detection size be 50 × 50mm plastic scintillator detector, the strut is made with slide bar from metallic aluminum material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720544166.9U CN206740992U (en) | 2017-05-17 | 2017-05-17 | γ absorbed dose rate instrument with soil moisture correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720544166.9U CN206740992U (en) | 2017-05-17 | 2017-05-17 | γ absorbed dose rate instrument with soil moisture correction |
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| Publication Number | Publication Date |
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| CN206740992U true CN206740992U (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720544166.9U Expired - Fee Related CN206740992U (en) | 2017-05-17 | 2017-05-17 | γ absorbed dose rate instrument with soil moisture correction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970409A (en) * | 2017-05-17 | 2017-07-21 | 成都理工大学 | The γ absorbed dose rates instrument corrected with soil moisture and bearing calibration |
-
2017
- 2017-05-17 CN CN201720544166.9U patent/CN206740992U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970409A (en) * | 2017-05-17 | 2017-07-21 | 成都理工大学 | The γ absorbed dose rates instrument corrected with soil moisture and bearing calibration |
| CN106970409B (en) * | 2017-05-17 | 2023-08-25 | 成都理工大学 | Gamma absorption dose rate instrument with soil humidity correction function and correction method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20200517 |
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| CF01 | Termination of patent right due to non-payment of annual fee |