Integrated Radiation Dosimeter and Density Meter System
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Solution Overview
Problem
Current portable radiation detection and density measurement devices require separate units, which are cumbersome, heavy, and inconvenient for users, especially in law enforcement and border control applications, where a single, compact, and modular solution is needed for real-time radiation detection and density analysis.
Innovation Solution
A personal radiation and density meter (PRDM) system that integrates a personal radiation dosimeter with a radiation source and shield assembly, allowing for one-handed operation and conversion between dosimeter and density meter modes, using a shield assembly that can be toggled between shielding and exposure configurations via a trigger mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate portable radiation detection and density measurement devices are used, then each device can be optimized for its specific function, but the user must carry and manage multiple devices which increases weight and complexity
Solution Approach 1:
The patent combines a radiation dosimeter and a density meter into a single integrated device. The dosimeter component detects radiation levels while the density meter component (with its own radiation source and detector) measures material density. By merging these previously separate devices, the system eliminates the need for users to carry multiple pieces of equipment, directly resolving the contradiction between functional optimization and weight reduction.
Solution Approach 2:
The integrated device performs multiple functions: it operates as a radiation dosimeter for personal radiation monitoring, as a density meter for material analysis, and can detect hidden objects. This multi-functionality allows a single device to replace multiple specialized devices, addressing the contradiction by maintaining functional capabilities while reducing the total equipment burden on the user.
2Reliability
If separate portable radiation detection and density measurement devices are used, then each device can be specialized, but the overall system complexity and number of components increases
Solution Approach 1:
The patent merges the dosimeter and density meter into a single integrated unit with shared housing, power sources, and control systems. While each functional component (dosimeter detector, density meter source, density meter detector) maintains its specialized capabilities, the integration reduces the overall system complexity by eliminating redundant structural elements and simplifying the user interface.
3Productivity
If a radiation source is always exposed for density measurement, then continuous measurement is possible, but unnecessary radiation exposure creates safety hazards
Solution Approach 1:
The patent implements a dynamic shielding mechanism where the shield assembly can move between exposed and retracted positions. During density measurements, the shield is exposed to allow radiation to pass through the target material. When measurements are complete or during transport, the shield retracts to block radiation, preventing unnecessary exposure. This dynamic control resolves the contradiction by enabling continuous measurement capability while eliminating persistent radiation hazards.
Solution Approach 2:
The shield assembly is positioned to automatically block radiation before measurement operations begin and to remain blocked during non-measurement periods. This preliminary protective action prevents unnecessary radiation exposure while maintaining the capability to expose the source when needed for measurements, directly addressing the contradiction between productivity and safety.
4Object-affected harmful factors
If a shield assembly is added to control radiation exposure, then radiation safety is improved, but the device size and mechanical complexity increases
Solution Approach 1:
The shield assembly is nested within the housing of the integrated device, allowing it to retract into the body of the device when not in use. This nesting arrangement minimizes the external volume of the device while still providing full shielding capability when needed, resolving the contradiction between radiation safety and compact size.
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 PRDM system provides a compact, rugged, and user-friendly solution for real-time radiation detection and density analysis, reducing the need for multiple devices and enhancing operational efficiency by allowing a single device to function as both a dosimeter and density meter.
Implementation Method 1
The radiation emitting sub-assembly includes a shield assembly, a radiation source, an actuator, a trigger, and an aperture
Implementation Method 2
The radiation detection sub-assembly includes a personal radiation dosimeter (PRD) positioned in the slot
Implementation Method 3
The shield assembly is in the interior portion and surrounds a radiation source
Data Source
AI summary
A personal radiation and density meter system includes a housing, a radiation detection subsystem and a radiation emitting sub-system. The housing includes an interior portion configured as an interior space, and a slot. The radiation detection sub-system includes a personal radiation dosimeter positioned in the slot. The radiation emitting sub-system includes a shield assembly, a source, an actuator, a trigger, and an aperture.