Probe Positioning via IMU and Acoustic Sensors
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Solution Overview
Problem
Non-destructive inspection systems face challenges in accurately determining the position of probe assemblies on complex components, such as nozzles and elbows, due to the need for complex encoding mechanisms, which increases inspection complexity and time.
Innovation Solution
The use of an inertial measurement unit (IMU) sensor, including a gyroscope and accelerometer, in conjunction with acoustic data from the probe assembly to estimate and confirm the position of the probe assembly, eliminating the need for complex encoding systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex encoding mechanisms are used to determine probe assembly position on complex components, then positioning accuracy is improved, but device complexity and inspection time increase
Solution Approach 1:
The patent replaces complex mechanical encoding mechanisms with a sensor-based system using IMU (inertial measurement unit) sensors and acoustic sensors. The IMU sensors measure probe assembly motion through acceleration and rotation, while acoustic sensors detect acoustic features on the component surface, combining these measurements to determine position without mechanical encoders.
Solution Approach 2:
The patent introduces acoustic features as an intermediary reference system. Instead of directly measuring position through complex mechanical encoders, the system uses acoustic sensors to detect acoustic features on the component surface and tracks their movement to infer probe assembly position, simplifying the overall positioning system.
2Measurement precision
If complex encoding mechanisms are used for corrosion or weld inspection on shaped components, then positioning accuracy is improved, but inspection time increases
Solution Approach 1:
The patent replaces time-consuming mechanical encoding systems with a sensor fusion approach using IMU and acoustic sensors. The IMU sensors continuously track probe motion while acoustic sensors provide position verification through acoustic feature detection, enabling faster positioning without sacrificing accuracy on complex geometries.
Solution Approach 2:
The system performs preliminary positioning using IMU sensor data, which provides continuous motion information. Acoustic sensor measurements are then used to verify and correct the position estimates. This two-stage approach with preliminary action reduces the time required compared to relying solely on complex mechanical encoders for every position determination.
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 allows for accurate positioning of the probe assembly on complex components without relying on complex encoding mechanisms, reducing inspection complexity and time while enabling precise imaging of features like corrosion and flaws.
Implementation Method 1
an inertial measurement unit (IMU) sensor, e.g., including a gyroscope and an accelerometer
Implementation Method 2
acoustic capability of the probe assembly... using an acoustic signal
Data Source
AI summary
Using various techniques, a position of a probe assembly of a non-destructive inspection system, such as a phase array ultrasonic testing (PAUT) system, can be determined using the acoustic capability of the probe assembly and an inertial measurement unit (IMU) sensor, e.g., including a gyroscope and an accelerometer, without relying on a complex encoding mechanism. The IMU sensor can provide an estimate of a current location of the probe assembly, which can be confirmed by the probe assembly, using an acoustic signal. In this manner, the data acquired from the IMU sensor and the probe assembly can be used in a complementary manner.