Wireless Miniature Dosimeter for Real-Time Ionising Radiation

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Solution Overview

Problem

Existing dosimeters, both passive and active, lack real-time measurement capabilities and are cumbersome, failing to provide immediate dose rate and integrated dose information for extremities and eye lens exposure to ionising radiation, which is critical for operator safety in environments with radiation.

Innovation Solution

A miniaturized, autonomous device with sensors, a wireless transmitter, and an embedded power source, weighing less than 10 grams and occupying less than 60 mm², that provides real-time ionising radiation measurement, including Gamma/Beta radiation, with integrated signal processing and power management to ensure compactness and functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If passive dosimeters are used for legal dosimetry, then measurement reliability is improved, but real-time measurement capability deteriorates

Engineering Contradiction:

Improvemeasurement reliabilityVSAvoidreal-time measurement capability

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines passive dosimetry (for reliable legal measurements) and active dosimetry (for real-time monitoring) into a single integrated device. The sensor assembly includes both passive dosimeter elements and active detection components with wireless transmission capability, allowing simultaneous achievement of measurement reliability and real-time feedback.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The device serves multiple functions: it performs both passive legal dosimetry and active real-time monitoring with wireless communication. This multi-functionality allows the same device to satisfy both the reliability requirements of legal dosimetry and the real-time capability needs of operational safety monitoring.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of time

If active dosimeters are used for real-time measurement, then real-time monitoring capability is improved, but device complexity and size increase

Engineering Contradiction:

Improvereal-time measurement capabilityVSAvoiddevice complexity and size

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical processing systems with electronic signal processing and wireless digital communication. The sensor signals are processed electronically and transmitted wirelessly, eliminating the need for complex mechanical mechanisms and reducing overall device complexity while maintaining real-time capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the operating parameters of the sensor to optimize for low-power consumption and miniaturization. By selecting specific sensor types and operating modes that work at low power levels, the device can be made smaller and simpler while still providing real-time measurement capability.

Inventive Principle:

Principle #35Parameter changes

3Area of moving object

If sensor size is reduced for miniaturization, then ease of wear is improved, but energy generation capability deteriorates

Engineering Contradiction:

Improvesensor areaVSAvoidenergy generation capability

Core Design Contradiction:

Area of moving objectVSUse of energy by moving object

Solution Approach 1:

The patent combines multiple energy harvesting mechanisms (piezoelectric, triboelectric, and electromagnetic induction) within the miniaturized sensor assembly. This combination allows the small device to accumulate sufficient energy from various sources including body movement, heat gradient, and electromagnetic fields to power both passive and active dosimetry functions.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The energy harvesting system is designed to capture energy from multiple sources simultaneously (mechanical movement, thermal gradient, electromagnetic fields), making the miniaturized sensor self-sufficient despite its small size. This multi-source energy capture compensates for the reduced energy generation capability inherent in smaller devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 real-time monitoring of ionising radiation exposure at extremities and eye lens, alerting operators and supervisors to dose thresholds, facilitating precise dosimetry and reducing physical constraints, suitable for professional and medical environments.

Implementation Method 1

at least one sensor of each said ionising radiation, supplying an electrical signal representative of the quantity of each said ionising radiation

Methodology Applied

Scientific EffectIonising radiation detection: Photoelectric Effect

Data Source

PatentUS12535600B2Individual self-contained device for measuring ionising radiation

Publication Date: 2026.01.27 ISYMAP SAS

AI summary

The individual autonomous device for measuring at least one ionising radiation comprises:at least one sensor (52) of each said ionising radiation, supplying an electrical signal representative of the quantity of each said ionising radiation;a wireless signal transmitter (53) configured to remotely transmit data representative of each signal supplied by a sensor; andan autonomous electric power source (54) configured to power each detector and this transmitter;the sensor, transmitter and power source being embedded in an assembly (50) with a surface area of less than sixty mm2, and the total weight of the assembly, sensor, transmitter and power source being less than ten grammes.