Passive Integrating Dosimeter with Filtration Bubble
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Solution Overview
Problem
Current radiation monitoring devices lack the ability to provide immediate, accurate, and widespread measurement of ionizing radiation exposure, especially in emergency situations, as they require power, are bulky, and do not offer real-time data access or geographic mapping of radiation distribution.
Innovation Solution
A self-contained, passive integrating dosimeter system using MEMS and nanotechnology to encapsulate ionizing radiation sensors within a 'filtration bubble' and integrate motion, position, and temperature sensors, enabling wireless transmission of radiation data and employing algorithms for energy discrimination and dose calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional radiation dosimeters are used, then radiation exposure can be measured, but immediate access to data is not available and power is required
Solution Approach 1:
The dosimeter system automatically transmits radiation exposure data wirelessly without requiring manual retrieval or processing. The device serves itself by autonomously communicating measurement data to remote systems, eliminating the time loss associated with manual data collection and providing immediate access to radiation exposure information.
2Measurement precision
If traditional radiation dosimeters are used, then radiation exposure can be measured, but the devices require continuous power supply
Solution Approach 1:
The dosimeter operates in periodic cycles, accumulating radiation measurements during passive integration periods and transmitting data only when necessary. This periodic operation pattern allows the device to maintain measurement functionality while minimizing power consumption by keeping electronic transmission components dormant during integration phases.
3Measurement precision
If multiple sensor elements are integrated, then accurate dose calculation from different radiation sources is achieved, but device complexity increases
Solution Approach 1:
Multiple sensor elements with different radiation filtration materials are integrated into a single dosimeter unit. These elements work together as a unified system, with each element detecting specific radiation types or energy ranges. The combined responses from all elements are processed algorithmically to calculate accurate personal dose equivalents, achieving comprehensive radiation monitoring while maintaining a compact single-device form factor.
4Reliability
If radiation dosimetry monitoring is implemented for large numbers of workers and citizens, then comprehensive radiation protection is achieved, but the cost and complexity of deployment increases
Solution Approach 1:
The dosimeter system is designed with universal applicability for both occupational and public radiation monitoring. The same device architecture, wireless communication protocol, and data processing platform serve both worker safety programs and citizen protection initiatives. This multi-functional design enables comprehensive radiation protection coverage across diverse populations without requiring separate complex monitoring infrastructures for different user groups.
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
Enables immediate access to radiation exposure data, reduces power consumption, and provides geographic mapping of radiation distribution, enhancing occupational and environmental dosimetry by correlating exposure with time, motion, and location.
Implementation Method 1
an optically stimulated luminescent material (OSLM) (i.e., aluminum oxide) to retain radiation energy. Tiny crystal traps within the OSL material trap and store energy from radiation exposure. The amount of exposure is determined by illuminating the crystal traps with a stimulating light of one color (i.e., green) and measuring the amount of emitted light of another color (i.e., blue).
Data Source
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AI summary
Described is a radiation dosimeter including multiple sensor devices (including one or more passive integrating electronic radiation sensor, a MEMS accelerometers, a wireless transmitters and, optionally, a GPS, a thermistor, or other chemical, biological or EMF sensors) and a computer program for the simultaneous detection and wireless transmission of ionizing radiation, motion and global position for use in occupational and environmental dosimetry. The described dosimeter utilizes new processes and algorithms to create a self- contained, passive, integrating dosimeter. Furthermore, disclosed embodiments provide the use of MEMS and nanotechnology manufacturing techniques to encapsulate individual ionizing radiation sensor elements within a radiation attenuating material that provides a "filtration bubble" around the sensor element, the use of multiple attenuating materials (filters) around multiple sensor elements, and the use of a software algorithm to discriminate between different types of ionizing radiation and different radiation energy.