Dual Sensor Dosimeter for High Intensity Radiation
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Solution Overview
Problem
Current active dosimeters face limitations in accurately measuring high intensity and pulsed radiation fields, leading to missed event counts and saturation issues, and are unable to provide real-time alerts for personnel exposed to these conditions, particularly in industries like interventional radiology and nuclear power.
Innovation Solution
A dual sensor dosimeter system comprising an event counting sensor and a high intensity sensor, with a processor that computes and communicates total dose values, enabling accurate measurement and real-time reporting of radiation exposure, even in high and pulsed field conditions, while maintaining low power consumption and portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single sensor is used in current active dosimeters, then the device structure is simple, but it cannot accurately measure both high intensity and pulsed radiation fields simultaneously
Solution Approach 1:
The radiation detection function is segmented into two specialized sensors: an event counting sensor for detecting individual radiation events and a high intensity sensor for measuring continuous high-level radiation fields. Each sensor is optimized for its specific detection regime, allowing accurate measurement across the full range of radiation conditions without requiring a single complex sensor design.
Solution Approach 2:
The dosimeter system achieves multi-functionality by combining two sensors that together can detect both pulsed low-intensity radiation and continuous high-intensity radiation fields. The system universally handles diverse radiation conditions by selecting appropriate sensor outputs based on the detected radiation characteristics, making a single device adaptable to multiple measurement scenarios.
2Speed
If event counting method is used, then real-time detection capability is provided, but saturation and missed counts occur in high intensity fields
Solution Approach 1:
The system dynamically switches between detection modes based on radiation intensity levels. The event counting sensor operates in high-speed real-time mode for low to moderate intensity fields, while the high intensity sensor takes over for continuous high-level fields. This dynamic adaptation allows the system to maintain both fast response and measurement reliability across varying radiation conditions.
Solution Approach 2:
The high intensity sensor acts as an intermediary that handles extreme radiation conditions where the event counting sensor would saturate. By introducing this specialized sensor, the system extends its reliable measurement range without compromising the real-time detection capability provided by the event counting sensor for normal operating conditions.
3Reliability
If high intensity sensor is used, then saturation in high fields is avoided, but inability to detect pulsed fields accurately occurs
Solution Approach 1:
The detection function is segmented by time scale: the event counting sensor captures rapid pulsed events with high temporal resolution, while the high intensity sensor measures steady-state radiation levels. This segmentation allows each sensor to excel at its designated detection task, with the system combining both measurements for comprehensive radiation monitoring.
Solution Approach 2:
The system merges the outputs of two specialized sensors to achieve complete radiation field characterization. The event counting sensor provides accurate pulsed field detection, while the high intensity sensor provides reliable continuous field measurement. By combining these complementary measurements, the system achieves both pulsed field detection accuracy and high field reliability.
4Adaptability or versatility
If dual sensor system is implemented, then wide range radiation measurement is achieved, but device complexity increases
Solution Approach 1:
Rather than designing a single sensor capable of handling all radiation conditions (excessive action), the system uses two specialized sensors each optimized for their specific detection range (partial action). This approach achieves wider overall adaptability while keeping each individual sensor component relatively simple, balancing versatility with manageable complexity.
Data Source
AI summary
An embodiment of a dosimeter apparatus is described that comprises a first radiation sensor configured to measure high energy photons from a radiation field; a second radiation sensor configured to measure accumulated photons from the radiation field over a time interval; an interface; and a processor comprising executable code stored thereon, wherein the executable code: computes a high dose value for the high energy photons measured by the first radiation sensor; computes an event dose value of the photons accumulated over the time interval; determines a total dose value for the time interval that comprises the greater of the high dose value or the event dose value; and communicates the total dose value for the time interval to a user via the interface.