Dosimeter Motion Correlation for Wear Duration
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Solution Overview
Problem
Existing radiation dosimeters struggle to accurately determine if an individual has been wearing the dosimeter and for how long, as well as correlating motion activity, time, and spatial position with radiation exposure, which is crucial for occupational monitoring and compliance verification.
Innovation Solution
A method using motion sensors, time data, and radiation dosage data to determine the duration of dosimeter wear, exposure events, and location, with a software algorithm to discriminate between different types of ionizing radiation and energies, enabling the correlation of radiation exposure with motion and position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion sensors and time data are integrated into the dosimeter, then the ability to determine wear duration and correlate motion activity with radiation exposure is improved, but the device complexity increases
Solution Approach 1:
The patent combines motion sensors, time data, and radiation dosage sensors into a single integrated dosimeter device. This merging of multiple sensing functions into one device enables comprehensive data collection for determining wear duration and correlating motion with radiation exposure, while avoiding the complexity of multiple separate devices.
Solution Approach 2:
The dosimeter is designed to perform multiple functions simultaneously: it measures radiation dosage, tracks motion activity through motion sensors, records time data, and determines spatial position. This multi-functional approach allows the single device to provide comprehensive occupational monitoring data without requiring separate specialized devices for each measurement type.
2Reliability
If motion sensors and processing algorithms are added to correlate motion data with radiation exposure, then the reliability of occupational monitoring is improved, but the device complexity increases
Solution Approach 1:
The dosimeter continuously collects and stores motion data, time data, and radiation dosage data in advance, creating a comprehensive dataset before analysis is required. This preliminary data collection and storage enables reliable correlation analysis between motion activity and radiation exposure events when the data is processed, improving monitoring reliability without requiring complex real-time processing algorithms.
Solution Approach 2:
The patent uses an intermediary processing system that receives data from the dosimeter's sensors and performs the correlation analysis between motion activity and radiation exposure. This intermediary layer separates the data collection function from the complex analysis function, allowing the dosimeter itself to remain relatively simple while still achieving reliable occupational monitoring through sophisticated post-processing of the collected data.
3Productivity
If the dosimeter continuously monitors motion and radiation data, then the productivity of safety monitoring is improved, but the energy consumption increases
Solution Approach 1:
The dosimeter implements periodic sampling of motion and radiation data rather than continuous monitoring at maximum resolution. The device collects data at appropriate intervals and uses time-stamped records to reconstruct wear duration and correlate events, maintaining high productivity for safety monitoring while significantly reducing energy consumption compared to continuous high-rate sampling.
Solution Approach 2:
The dosimeter uses its own motion data and time stamps to automatically determine wear duration and validate radiation exposure events without requiring external verification systems. This self-service capability enables efficient safety monitoring by allowing the device to independently assess its own operational status and correlate events, improving productivity while minimizing the need for additional power-consuming external infrastructure.
Data Source
AI summary
Described are a method and apparatus for determining based on motion data when an individual wearing a dosimeter is active. Also described are a method and apparatus for determining based on motion data whether an individual was wearing a dosimeter when the dosimeter was exposed to radiation. Also described are a method and apparatus for determining based on motion data whether a dosimeter was in a particular location when the dosimeter was exposed to radiation. Also described are a method and apparatus for determining based on motion data where on the body of an individual the individual was wearing a dosimeter when the dosimeter was exposed to radiation. Also described are a method and apparatus for determining based on motion data the probability that an individual is wearing a dosimeter that is assigned to the individual.