Remote Impulse Response Measurement via Low-Intensity Pulse Train
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Solution Overview
Problem
Existing methods for remotely exciting objects to measure mechanical properties are either destructive, require high-intensity pulses, or have limited traceability and applicability, especially for non-polarizable materials and objects that are hard to access.
Innovation Solution
A device and method using low-intensity electromagnetic radiation pulses in a controlled pulse train to apply mechanical excitation, leveraging radiation pressure for non-destructive, contact-free measurement with high traceability of the applied force impulse, suitable for a wide range of materials including hard-to-polarize objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-intensity electromagnetic radiation pulses are used to excite the object, then the mechanical response can be detected, but the method becomes destructive and harmful to the user
Solution Approach 1:
The patent applies periodic action by using a pulse train consisting of multiple low-intensity electromagnetic radiation pulses instead of a single high-intensity pulse. The pulses are applied periodically over time, allowing the mechanical response to accumulate and become detectable while keeping each individual pulse intensity low enough to avoid destruction and harm.
Solution Approach 2:
The patent applies preliminary action by performing a convolution operation between the detected mechanical response and the pulse train before final analysis. This preliminary signal processing step enhances the detectability of the mechanical response by correlating it with the known excitation pattern, allowing detection with lower intensity pulses.
2Object-affected harmful factors
If a single low-intensity pulse is used, then the object is not damaged, but the mechanical response is lost in signal noise
Solution Approach 1:
The patent applies merging by combining multiple low-intensity pulses into a pulse train. The mechanical responses from individual pulses are merged through convolution with the pulse train signal, accumulating the response energy while keeping each pulse intensity low enough to avoid damage. This combining approach improves the signal-to-noise ratio without increasing individual pulse intensity.
3Force
If plasma formation or laser ablation is used to generate vibration, then mechanical excitation is achieved, but the material is exhausted and destroyed
Solution Approach 1:
The patent replaces destructive mechanical excitation methods (plasma formation, laser ablation) with a non-destructive electromagnetic radiation pulse train approach. Instead of using high-intensity pulses that cause material removal or phase changes, the patent uses multiple low-intensity pulses whose collective mechanical effect is enhanced through convolution signal processing, thereby substituting a destructive mechanical system with a non-destructive electromagnetic system.
4Force
If electrostrictive effect is used for excitation, then mechanical stress is generated, but applicability is limited to materials with specific polarization characteristics
Solution Approach 1:
The patent achieves universality by using electromagnetic radiation pulses that can interact with a wide variety of materials through radiation pressure, regardless of their polarization characteristics. Unlike the electrostrictive effect which requires specific material properties, the pulse train method with convolution processing can be applied universally to different materials including hard-to-polarize objects, making the measurement system multi-functional and broadly applicable.
5Object-affected harmful factors
If thermoelastic method is used, then non-destructive measurement is achieved, but extensive optimization is required for each object and situation
Solution Approach 1:
The patent applies parameter changes by using a pulse train with variable parameters (number of pulses, pulse width, pulse spacing) that can be adjusted through convolution processing. This allows the system to adapt to different objects and situations through signal processing rather than requiring extensive physical optimization of the excitation mechanism, reducing device complexity while maintaining non-destructive measurement capability.
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 safe, effective, and non-destructive remote measurement of mechanical responses from objects, providing high traceability and applicability to various materials, including those inaccessible or sensitive, with minimal heating and no need for direct contact.
Implementation Method 1
the momentum of the electromagnetic waves is used, which provides high traceability of the applied force impulse
Data Source
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AI summary
The invention relates to a device and a method for remotely determining the impulse response of an object irradiated by a pulse train with low-intensity pulses of electromagnetic radiation. A complete representation of the pulse train transmitted towards the object is known in advance, and a convolution between the signal representation of the pulse train and the signal of the detected response from the object is performed, which provides a signal representation of the impulse response. Said signal representation can then be used, e.g., to analyze possible defects in the structure of the object.