Radon Detection Apparatus Isolate Remote Origin Fraction
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Solution Overview
Problem
Current monitoring instruments cannot accurately differentiate between radon (222Rn) of local and remote origin, which is crucial for understanding geophysical phenomena, as they fail to account for ambient parameters that affect detection accuracy.
Innovation Solution
A method and apparatus that analyze the site to determine a typical ratio between 222Rn and 220Rn of local origin, using alpha spectroscopy and sensors to measure ambient parameters like pressure, temperature, and humidity, allowing for the correction of emission coefficients and detection efficiency to isolate the remote origin fraction of 222Rn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional monitoring instruments are used to detect radon concentration, then total radon levels can be measured, but the instruments cannot differentiate between local and remote origin radon fractions
Solution Approach 1:
The patent uses thoron (220Rn) as an intermediary substance to indirectly measure and subtract the local radon fraction. Since thoron has a short half-life and cannot travel far, it serves as a reliable tracer for local radon sources. By measuring thoron concentration and applying a predetermined ratio, the system calculates local radon contribution and subtracts it from total radon measurements to isolate remote origin radon.
Solution Approach 2:
The patent changes the measurement parameter from direct radon fraction differentiation to indirect measurement through thoron concentration and ratio calculation. This approach transforms an intractable measurement problem into a solvable one by using a related measurable parameter (thoron levels) that correlates with local radon sources.
2Measurement precision
If ambient parameters are not corrected for, then measurement process is simpler, but detection accuracy is reduced due to environmental interference
Solution Approach 1:
The patent implements feedback by continuously monitoring ambient parameters (temperature, pressure, humidity) and using these measurements to correct the radon and thoron concentration readings. The system adjusts for environmental effects on both the exhalation process from ground and the detector operation, ensuring accurate measurements despite varying atmospheric conditions.
Solution Approach 2:
The patent performs preliminary characterization of the measurement site to establish the predetermined ratio between local radon and thoron concentrations. This pre-established ratio is then used in real-time measurements to quickly differentiate radon fractions without requiring complex real-time analysis of source contributions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances detection accuracy by separating local and remote radon contributions, providing reliable measurements of remote origin 222Rn concentrations, essential for scientific and sanitary monitoring, especially in geophysically active areas.
Implementation Method 1
measuring, at predetermined time intervals, the alpha spectroscopy in the measuring site by means of an appropriate measuring chamber
Data Source
AI summary
A method and an apparatus for detecting the remote origin fraction of 222Rn present in a measuring site (Z) for the monitoring of dynamic phenomena inside the land crust, comprising the following steps: a) analysis of the measuring site (Z) in order to state a typical ratio between 222Rn of local origin and 220Rn of local origin; b) measurement, at preset time intervals, of alpha spectroscopy in the measuring site (Z) by a measuring chamber (2); c) processing of said alpha spectroscopy in order to find the concentrations of 222Rn and 220Rn present in the measuring site (Z); d) determination of the concentration of 222Rn of local origin by multiplying the concentration of 220Rn with the typical ratio; subtraction of the concentration of 222Rn of local origin from the concentration of 222Rn to obtain the concentration of the remote origin fraction Of 222Rn.