Thermal Image Beacon With Movable Heat Source
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Solution Overview
Problem
Current thermal identification systems are ineffective in low light or total darkness, leading to fratricide and resource wastage, as they rely on passive methods that are easily masked and difficult to differentiate from surroundings, and cannot rapidly change state or produce a clear signal in the 2-12 micrometer range.
Innovation Solution
A thermal image identification marker system using a parabolic reflector with a movable black heat source and microprocessor-controlled mechanism to create a rapidly flashing, uniquely coded thermal image, minimizing power consumption and differentiating from ambient surroundings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a passive thermal panel identification marking system is used, then the system is simple and low-power, but the thermal image cannot be differentiated from ambient surroundings and is easily masked
Solution Approach 1:
The patent applies dynamics by making the thermal imaging marker change its thermal state rapidly over time. The marker transitions between different thermal emission states (high and low) in a controlled sequence, creating a dynamic temporal pattern that enables active identification. This temporal dynamics allows the marker to stand out from static ambient thermal backgrounds while maintaining energy efficiency through controlled activation cycles.
Solution Approach 2:
The patent implements periodic action through sequenced activation of multiple thermal markers. Each marker is activated in a specific temporal sequence, creating periodic thermal flashes that encode identification information. This periodic activation pattern allows receivers to distinguish marked targets from ambient thermal noise while managing power consumption through intermittent rather than continuous operation.
2Speed
If a heat source is made to rotate to produce a flashing thermal image, then the flash repetition rate can be controlled, but the system becomes omni-directional and inefficient
Solution Approach 1:
The patent applies segmentation by dividing the thermal emission function into multiple discrete markers arranged in a specific geometric pattern. Instead of using a single rotating heat source, multiple stationary thermal markers are activated in sequence. This segmentation allows controlled directional thermal emission patterns while eliminating the energy losses associated with mechanical rotation, achieving efficient flash repetition through electronic sequencing rather than mechanical movement.
3Temperature
If a thermal image is produced by a heat source, then the image can be generated, but the image cannot switch on and off rapidly due to heating and cooling time lags
Solution Approach 1:
The patent employs thin-film thermal markers that can rapidly change thermal state. These thin-film structures have low thermal mass, enabling them to heat up and cool down quickly in response to activation signals. This allows the thermal markers to switch between on and off states at high speeds, overcoming the limitation of traditional bulk heat sources and enabling rapid temporal modulation for identification purposes.
4Illumination intensity
If power input to a heat source is increased to produce a clear thermal signal, then the thermal signal becomes stronger, but additional visual input is created and power consumption increases
Solution Approach 1:
The patent applies partial action by activating only the necessary number of thermal markers in a sequenced manner rather than all markers simultaneously. Each marker is activated for a specific duration and intensity just sufficient to create detectable thermal contrast. This partial activation approach achieves adequate thermal signal clarity for identification while minimizing total power consumption compared to continuous full-power operation of all markers.
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 system produces a clear, rapidly changing thermal signal that can be uniquely identified, optimizing viewing by thermal imaging devices and minimizing power usage while avoiding confusion with ambient heat sources.
Implementation Method 1
The system comprises a parabolic reflector and a heat source positioned at the focal point of the reflector
Implementation Method 2
Present thermal panel identification marking equipment is passive and only provides identification by temperature or emissivity differences
Data Source
AI summary
A system comprised of a one or more rapidly flashing thermal image beacons, a plurality of sensors, a control subsystem, input means, and a power source. Each beacon being comprised of a precision machined and polished parabolic or elliptical mirror. A resistive heating element is nominally positioned at the mirror focal point. The heating element is mounted on a carriage which can be moved backwards and forwards by a microprocessor-controlled mechanism. The resulting oscillatory action creates a rapidly changing coded flashing thermal image.