Elastic Wave Radar Detection Device Signal Homogeneity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing elastic wave detection methods for structural debonding lack consistency in vibration excitation information, leading to poor homogeneity of received signals and affecting detection accuracy.
Innovation Solution
An elastic wave radar detection device and method that includes a vibration excitation device with sensors to collect and process incident and vibration signals, using a standard incident signal to achieve signal uniformity, involving a vibration excitation hammer or rod, and employing Fourier transforms to obtain frequency and time domain representations of the signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a knocking method is used for elastic wave detection, then the detection can be performed, but the homogeneity of received vibration signals is poor due to varying vibration excitation information
Solution Approach 1:
The patent applies feedback by using a sensor to detect the actual vibration excitation information and feeding this information back to the signal processing system. This allows the system to compensate for variations in knocking intensity and characteristics, thereby improving signal homogeneity and detection accuracy.
Solution Approach 2:
The patent changes the parameter representation of vibration signals by transforming time-domain signals into frequency-domain signals through Fourier transform. This parameter transformation enables better comparison and analysis of signals with different amplitudes and timing characteristics, improving signal homogeneity.
2Measurement precision
If vibration excitation information is not recorded, then the detection process is simple, but the detection accuracy is affected due to lack of incident signal information
Solution Approach 1:
The patent makes the sensor serve multiple functions: it both detects the vibration signal from the detected object and detects the vibration excitation information (incident signal). This multi-functionality approach improves detection accuracy without significantly increasing system complexity.
Solution Approach 2:
The detection system uses its own sensor to automatically detect and record the vibration excitation information, eliminating the need for separate measurement equipment or manual recording. The system serves itself by using the same sensor for both incident signal and reflected signal detection.
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 method improves detection accuracy by ensuring consistent signal amplitudes and start points, allowing for intuitive analysis of detected object characteristics and enhancing the uniformity of vibration signals, thereby improving the detection results.
Implementation Method 1
The first sensor is arranged on the vibration excitation device... The first sensor is used to collect vibration excitation information, that is, an incident signal
Implementation Method 2
The second sensor is arranged on a detected object... The second sensor is used to collect information of the detected object, that is, a vibration signal
Implementation Method 3
respectively performing Fourier transform on the incident signal, the vibration signal and the standard incident signal after each knock to obtain respective corresponding frequency domain complex representation forms
Data Source
AI summary
Provided are an elastic wave radar detection device and method. The device includes a vibration excitation device, a first sensor, a second sensor, and a controller. The first sensor is arranged on the vibration excitation device, and the second sensor is arranged on a detected object. The first sensor is used to collect vibration excitation information, namely, an incident signal, and the second sensor is used to collect information of the detected object, namely, a vibration signal. Both the first sensor and the second sensor are connected to the controller. The elastic wave radar detection device and method provided by the present disclosure can receive vibration excitation information and introduce a standard incident signal, so as to achieve the uniformity of signals and improve the detection accuracy.