Tamper-Resistant Credit Card Dosimeter with Self-Reading Sensor
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Solution Overview
Problem
Conventional radiation dosimeters are not instantaneously readable, tamper-resistant, or cost-effective for widespread public use, leading to delayed exposure detection and increased panic during radiological incidents.
Innovation Solution
A disposable, tamper-resistant, machine-readable radiation dosimeter (IDPD) integrated into a credit card format with a self-indicating radiation sensor and an accredited sensor, allowing for immediate visual exposure indication and high-speed machine reading, eliminating the need for external power and providing a window for reading without removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional dosimeters (TLD, OSL, RLG, X-ray film) are used for monitoring radiation exposure, then measurement precision and sensitivity are improved, but reading time is delayed and device complexity increases due to laboratory processing requirements
Solution Approach 1:
The dosimeter performs self-reading through an integrated electronic sensor and processor that automatically measures and displays radiation dose without requiring external laboratory processing. The device serves itself by providing immediate digital readout of exposure levels.
Solution Approach 2:
The patent replaces the mechanical/chemical reading process (sending dosimeters to labs for physical analysis) with an electronic digital reading system. The electronic sensor and processor substitute for manual laboratory measurement, enabling instant digital display of radiation dose.
2Measurement precision
If conventional dosimeters are used for radiation monitoring, then measurement precision is improved, but ease of operation deteriorates due to complex processing requirements and lack of instant reading capability
Solution Approach 1:
The dosimeter automatically processes and displays radiation dose information without requiring user intervention for laboratory submission or complex processing procedures. The device self-evaluates and presents results in an easily interpretable digital format.
Solution Approach 2:
The patent creates a digital copy of the radiation dose measurement that can be immediately displayed and interpreted, replacing the need for physical dosimeter processing. The digital reading serves as an immediate replica of the measurement data.
3Ease of manufacture
If disposable credit card format dosimeter is implemented, then ease of manufacture and cost-effectiveness are improved, but device complexity increases due to integration of multiple sensors and reading mechanisms
Solution Approach 1:
The patent combines multiple functional elements (electronic sensor, processor, display, and credit card format) into a single integrated device. The sensor, processing circuitry, and display are merged into one unit that functions as both a dosimeter and a readable device.
Solution Approach 2:
The dosimeter serves multiple functions: it monitors radiation exposure, processes measurements electronically, displays results immediately, and provides identification capabilities through the credit card format. This multi-functionality reduces the need for separate devices.
4Reliability
If tamper-resistant design is implemented, then reliability is improved, but device complexity increases due to additional protective measures and security features
Solution Approach 1:
The patent uses a thin film or shell structure to protect the electronic sensor and circuitry within the dosimeter. This protective layer prevents tampering while maintaining the overall simplicity of the device design.
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 rapid, accurate radiation exposure assessment for individuals, reducing panic and potential lawsuits by providing immediate visual feedback and allowing for swift determination of exposure levels, even in high-stress situations like radiological incidents.
Implementation Method 1
Optically stimulated luminescence (OSL) has proven to be a superior method of measuring radiation dose. Generally speaking, OSL methods illuminate a previously irradiated dosimeter with light of a particular frequency and intensity. This exposure excites light production within the dosimeter by transfer of charges from traps to luminescence centers.
Implementation Method 2
The sensing strip comprises a unique class of compounds called diacetylenes... When exposed to radiation such as a 'dirty bomb', a nuclear detonation, or a radiation source, the self indicating radiation sensor of the device develops color, preferably blue or red, instantly.
Data Source
AI summary
A radiation detection device with at least one self indicating radiation sensor and at least one machine readable sensor.