Ultrasonic Inspection Signal Processing for High-Attenuation Materials
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Solution Overview
Problem
Ultrasonic inspection methods face challenges with high-attenuation materials and long propagation paths, leading to poor signal-to-noise ratios due to noise signals from material characteristics and electrical noise, which existing technologies struggle to mitigate effectively without specialized devices for pulse signal modulation.
Innovation Solution
The ultrasonic inspection method performs pulse compression processing directly on waveform data using a computer system, generating composite waveform data through phase modulation and demodulation techniques, and removing noise portions to enhance the signal-to-noise ratio without requiring a special device for pulse signal modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulse compression processing is performed using a special device for modulating the pulse signal, then the signal-to-noise ratio is improved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical/electronic pulse signal modulation device with a software-based processing approach. The computer executes pulse compression processing algorithms on the waveform data to achieve signal-to-noise ratio improvement without requiring physical modulation hardware, thus substituting a complex mechanical system with a simpler software solution
Solution Approach 2:
The patent creates a virtual model of the pulse signal processing through software simulation. The computer generates and processes digital representations of the ultrasonic signals and applies pulse compression algorithms to these digital copies, achieving the same effect as physical modulation devices without the associated complexity and cost
2Measurement precision
If the time width of the pulse signal is expanded through modulation, then the time resolution of the waveform signal is improved, but the device complexity increases
Solution Approach 1:
The patent replaces physical signal modulation mechanisms with digital signal processing techniques. The computer applies pulse compression algorithms to the waveform data to achieve time resolution improvement without requiring modulation devices, thus substituting complex mechanical systems with software-based solutions
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 improves the signal-to-noise ratio of ultrasonic inspection data, enabling more reliable inspections of high-attenuation materials and reducing the need for expensive specialized devices, thereby enhancing the effectiveness of ultrasonic inspections.
Implementation Method 1
a pulse signal is output to an ultrasonic sensor to generate and transmit ultrasonic waves
Implementation Method 2
the ultrasonic waves reflected or scattered due to a defect of an object
Implementation Method 3
the ultrasonic waves reflected or scattered due to a defect of an object or the like is received
Implementation Method 4
In the phase modulation method, a phase of the pulse signal is modulated according to a preset code string
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5C
AI summary
An ultrasonic inspection method in which a pulse signal is output to an ultrasonic sensor to generate and transmit ultrasonic waves, the ultrasonic waves reflected or scattered by an object are received and converted into a waveform signal by the ultrasonic sensor, and the waveform signal is digitized to acquire waveform data, includes: executing modulation processing for modulating a plurality of waveform data acquired in multiple inspections and under the same inspection conditions by a phase modulation method to generate composite waveform data; and executing demodulation processing for demodulating the composite waveform data to generate compressed waveform data.