Scintillation Radon Detector With Light-Tight Air-Permeable Housing
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Solution Overview
Problem
Existing radon detectors with optical sensors are complex, expensive, energy-intensive, large, and slow, lacking sensitivity and cost-effectiveness.
Innovation Solution
A compact, energy-efficient alpha radiation detector with an optical sensor featuring a housing made of light-opaque, gas-permeable material and a scintillation material-coated hood, using a silicon photomultiplier for detecting alpha particles, with a closed chamber design to prevent external light interference and allow air entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a completely closed housing is used to prevent light interference, then light tightness is improved, but air entry for radon measurement is hindered
Solution Approach 1:
The housing incorporates a gas-permeable material that allows air to pass through while maintaining light tightness. This porous/permeable material enables radon-containing air to enter the measurement chamber without allowing external light to interfere with the sensitive photodetector.
Solution Approach 2:
The housing uses a composite structure combining light-opaque and gas-permeable properties in a single material or material combination, achieving both light tightness and air permeability simultaneously rather than requiring separate components.
2Measurement precision
If complex detector designs are used to improve sensitivity, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates unnecessary components from traditional radon detector designs. By using a simplified housing structure with gas-permeable material and a direct measurement chamber configuration, it removes complex subsystems while maintaining detection sensitivity through the fundamental alpha particle detection principle.
Solution Approach 2:
The detector employs cost-effective materials and a simplified design that reduces manufacturing expenses. The gas-permeable housing material and basic scintillation chamber configuration enable economical production while achieving reliable radon measurement performance.
3Measurement precision
If traditional optical sensor designs are used, then detection capability is achieved, but energy consumption and response time are insufficient
Solution Approach 1:
The invention optimizes the operational parameters of the optical sensor system, including the photodetector characteristics and scintillation material properties, to achieve high detection sensitivity with reduced energy consumption and improved response time compared to traditional designs.
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
The detector achieves high sensitivity, rapid response, and cost-effective manufacturing while maintaining a small form factor and low energy consumption.
Implementation Method 1
utilizes the property of scintillators, i.e., materials that emit a light pulse upon contact with an alpha particle
Implementation Method 2
The light pulses generated in this way are then detected by an optical sensor
Implementation Method 3
an annular area of the housing is made of a material that is opaque to light but permeable to air/gas
Data Source
Figure 1
AI summary
The invention relates to an alpha radiation detector (1) for measuring the radon concentration in the ambient air, comprising a housing (10) with a chamber (9) located therein, wherein the housing (10) is designed such that ambient air can enter the chamber (9) from the outside, and an optical sensor (4), characterized in that an inner wall of the housing (10) is provided with a scintillation material (3) which, when struck by alpha particles (7), generates light pulses (8) which are detected by the optical sensor (4).