Ultrasonic Inspection Eccentric Probe Arrangement
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Solution Overview
Problem
Existing ultrasonic inspection techniques face challenges in accurately detecting small defects, particularly when using airborne ultrasonic methods, as the received signals are faint and difficult to distinguish from noise.
Innovation Solution
The ultrasonic inspection device system employs a transmission probe and a reception probe positioned apart from the object, with an adjustable eccentric distance between their sound axes, allowing for improved signal detection and defect localization in air without the need for immersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If airborne ultrasonic inspection is used to avoid immersion restrictions, then ease of operation is improved, but measurement precision deteriorates due to extremely faint received signals
Solution Approach 1:
The patent changes the geometric parameter of probe arrangement by introducing eccentric distance between transmission and reception sound axes. This parameter modification enables the reception probe to capture scattered waves from defects more effectively, transforming the extremely faint signals into detectable levels while maintaining airborne inspection advantages
Solution Approach 2:
The patent transitions from conventional aligned probe arrangement to eccentric arrangement, adding a spatial dimension consideration. By positioning reception probe at an eccentric distance from the transmission sound axis, the system exploits scattered wave propagation in different spatial directions, thereby improving signal detection capability
2Device complexity
If transmission and reception probes are aligned directly opposite each other, then device complexity is reduced, but defect detection accuracy deteriorates due to inability to distinguish defect signals from normal object parts
Solution Approach 1:
The patent introduces asymmetric probe arrangement by setting eccentric distance between transmission and reception sound axes. This asymmetric configuration enables the reception probe to selectively receive scattered waves from defects while excluding direct transmission waves from normal object parts, achieving effective signal differentiation
Solution Approach 2:
The patent applies local quality principle by positioning the reception probe at a specific eccentric distance from the transmission sound axis. This localized positioning optimizes the reception of scattered waves from defect regions while minimizing interference from normal object parts, thereby improving defect detection accuracy
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 configuration enhances defect detection accuracy by increasing the signal strength for defects while minimizing noise from the normal object parts, thereby improving the signal-to-noise ratio and enabling precise detection of small defects.
Implementation Method 1
causes an ultrasound beam to enter an object through a gas for inspection of the object
Implementation Method 2
measuring the transmitted ultrasound beams, the defect included within the object therefore can be detected
Data Source
AI summary
To improve defect detection accuracy, an ultrasonic inspection device causing an ultrasound beam to enter an object through a gas for inspection of the object includes: a transmission probe emitting the ultrasound beam; a reception probe mounted on an opposite side of the object from the transmission probe; and an eccentric distance adjuster that adjusts an eccentric distance between a transmission sound axis which is the central axis of the propagation path of the ultrasound beam transmitted from the transmission probe and a reception sound axis which is the central axis of the propagation path of an ultrasound beam assumed to be emitted from the reception probe to a distance greater than zero.