Gamma absorption dose rate instrument having soil moisture correction and correction method thereof

A technology of absorbed dose and soil moisture, applied in the field of nuclear radiation detection, can solve problems such as changes, inaccurate data, and affecting the measured value of gamma dose rate, so as to increase the scope of use and reduce errors

Pending Publication Date: 2017-07-21
CHENGDU UNIVERSITY OF TECHNOLOGY
View PDF14 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of rainfall, water is stored in the pores of the soil, and the soil structure has a certain porosity. After the pores are filled with water, the material composition of the soil is changed. When the gamma rays pass through the soil, the scattering and photoelectric cross-sections change, making The effective cross section changes; when the gamma rays pass through the soil

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gamma absorption dose rate instrument having soil moisture correction and correction method thereof
  • Gamma absorption dose rate instrument having soil moisture correction and correction method thereof
  • Gamma absorption dose rate instrument having soil moisture correction and correction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: see figure 1 with figure 2 , a gamma absorbed dose rate meter with soil moisture correction, including a detector and a host, the detector is used to detect the air absorbed dose of gamma rays produced by radionuclides in the soil, and the detector includes a housing 1 and a housing The detection head 2 in 1, the detection head 2 is vertically downward, and the top is successively provided with a photomultiplier tube 3 and a preamplification circuit 4, and the output end of the detection head 2 passes through the photomultiplier tube 3 and the preamplification circuit 4 After connecting to the host, the two sides of the detector are respectively provided with a strut 5, and the two sides of the detector are fixedly connected with the strut 5, and the bottom of the strut 5 exceeds the bottom of the detector, and the strut 5 is respectively provided with a horizontal, And the sliding rod 6 that can slide up and down along the support rod 5, the lower surfa...

Embodiment 2

[0049] see image 3 with Figure 4 , choose a piece of soil in a certain place to carry out the simulation experiment, the moisture environment is respectively 0, 10%, 20%, 30% and 40%, and measure the air absorbed dose rate under different humidity.

[0050] It can be seen from the figure that as the humidity increases, the absorbed dose decreases from 269nGy / h to 178nGy / h at 40% moisture. After calibration, the maximum error is 3.2% when drying. The measured values ​​are compared in Table 1 below:

[0051] Table 1: Ratio of measured values ​​before and after correction

[0052]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a gamma absorption dose rate instrument having soil moisture correction. The gamma absorption dose rate instrument comprises a detector and a host. The detector comprises a shell and a detection head arranged in the shell. The detection head is vertically downward, and the top part is provided with a photomultiplier and a pre-amplification circuit in turn. The two sides of the detector are respectively provided with a supporting rod. The bottom part of the supporting rod exceeds the bottom part of the detector. The supporting rod is provided with a slide rod. A soil hygrometer is fixedly connected on the lower surface of the slide rod. The output end of the soil hygrometer is connected with the host. The actually measured data of the detector can be corrected in real time according to the moisture so that the data are enabled to be more accurate and reliable after moisture correction, and the requirements that the samples require to be used for comparison and judgment under the dry condition can be met.

Description

technical field [0001] The invention relates to a nuclear radiation detection technology, in particular to a gamma absorbed dose rate meter with soil moisture correction and a correction method. Background technique [0002] With the rapid development of nuclear industry and nuclear technology application industry, nuclear detection technology has also been vigorously developed. Because the gamma dose rate meter is mainly used to measure the absorbed dose rate of ambient air, it has the characteristics of stable work, portability, and high sensitivity. It is an important means of environmental on-site radiation dose monitoring. has been widely applied. [0003] Field gamma dose measurement is subject to many interference factors, such as the influence of soil moisture content measurement. In the process of rainfall, water is stored in the pores of the soil, and the soil structure has a certain porosity. After the pores are filled with water, the material composition of the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01T1/02G01T7/00
CPCG01T1/02G01T7/005Y02E30/30
Inventor 张庆贤谷懿葛良全曾国强马永红杨佳田晓峰
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap