ASEM Measurement Timing Control for In-Phase Wide-Area Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The Acoustically Stimulated EM (ASEM) method faces the challenge of obtaining a weak signal due to out-of-phase sound waves when multiple generators are used to irradiate different points in a large area, limiting the increase in signal strength.
Innovation Solution
A measurement device and method that aligns the phases of sound waves irradiated to different points in a wide area of the measurement object by controlling the timing of sound wave generation, ensuring simultaneous arrival at these points, using a plurality of sound wave generators arranged in arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple sound wave generators are used to irradiate sound waves to different points in a large area, then the irradiation area is increased, but the ASEM signal strength remains weak because the sound waves are not in phase
Solution Approach 1:
The patent applies preliminary action by calculating and setting the timing of sound wave generation in advance, before the actual measurement process. The timing control unit pre-determines the optimal generation timing for each sound wave generator based on the distance to the measurement point, ensuring that all sound waves arrive simultaneously at the measurement point. This preliminary timing arrangement resolves the phase inconsistency problem that would otherwise occur when using multiple generators across a large area.
Solution Approach 2:
The patent changes the timing parameter of sound wave generation for each generator based on its position relative to the measurement point. By adjusting the generation timing parameter proportionally to the distance, the system ensures that sound waves from different generators arrive at the same time at the measurement point, achieving constructive interference and enhanced signal strength while maintaining large area coverage.
2Measurement precision
If conventional ultrasonic transducers with fixed spherical shape are used, then spatial resolution is maintained, but the irradiation area cannot be increased without losing signal phase coherence
Solution Approach 1:
The patent introduces dynamics by making the sound wave generation timing adjustable and controllable for each generator element. Instead of using a fixed spherical transducer geometry, the system dynamically adjusts the timing of each generator based on the desired measurement point and area. This dynamic timing control allows the system to expand the irradiation area while maintaining phase coherence at the measurement point, effectively decoupling the area limitation from the spatial resolution requirement.
3Area of stationary object
If array probe transducers scan beams by creating spherical waveforms, then coverage is improved, but sound waves irradiated to different points are still not in phase
Solution Approach 1:
The patent implements feedback by using echo signals from the measurement point to verify and refine the timing control. The system receives echo signals from the measurement point and uses this feedback information to adjust and optimize the timing of sound wave generation for each generator. This feedback mechanism ensures that the timing adjustments achieve the desired phase coherence effect, compensating for any variations in the scanning process and maintaining signal coherence across the coverage area.
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
This approach enhances the ASEM signal strength by ensuring in-phase sound wave irradiation over a wide area, allowing for non-invasive, high-resolution measurement of electrical, magnetic, electromechanical, and magnetomechanical characteristics.
Implementation Method 1
The measurement technique 'Acoustically Stimulated EM Method', hereinafter referred to as 'ASEM method' (Acoustically Stimulated EM method), developed by the inventors, modulates the electric charge and magnetization of a measurement object by irradiating it with sound waves.
Implementation Method 2
The sound waves generated by the sound wave source reach at different points in the measurement object simultaneously.
Data Source
AI summary
A measurement device comprises a sound wave source that irradiates sound waves to different points in the measurement object; and a measurement unit that receives an electromagnetic field generated at each point of the measurement object to which the sound waves are irradiated, and measures a signal indicating at least one characteristic selected from the group comprising electrical characteristics, magnetic characteristics, electromechanical characteristics and magnetomechanical characteristics of the measurement object based on at least one selected from the group comprising the intensity, phase and frequency of the received electromagnetic field. The sound waves generated by the sound wave source reach at different points in the measurement object simultaneously.