Acoustic Wave Probe Trajectory Control for Orientation Stability
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Solution Overview
Problem
Scanning-type acoustic wave acquisition apparatuses face instability in probe orientation when quickly changing direction, particularly when designating close measurement positions, leading to undesirable signal acquisition for measurements.
Innovation Solution
The apparatus includes a movement control unit that determines trajectories for the probe based on distance thresholds, moving more linearly for longer distances and more curvilinearly for shorter distances to maintain stability and continuity of measurement, using multiple imaging views to optimize movement paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the probe moves quickly to the designated measurement position, then the measurement time is reduced and productivity is improved, but the probe orientation becomes unstable and measurement reliability deteriorates
Solution Approach 1:
The patent applies dynamics by making the movement trajectory adaptive rather than fixed. The system dynamically adjusts the probe's movement path based on real-time conditions, allowing the probe to follow smooth curved trajectories that maintain orientation stability while still achieving efficient measurement. This is evident in the control method that calculates optimal trajectories considering both speed and orientation stability requirements.
Solution Approach 2:
The patent changes the movement parameters (trajectory curvature, speed profile) based on the measurement position and probe state. By adjusting these parameters dynamically, the system achieves both fast response and stable orientation. The control unit modifies movement parameters to ensure the probe maintains proper orientation during transit to the measurement position.
2Loss of time
If the probe changes direction quickly to reach a close measurement position, then the response time is improved, but the probe orientation becomes unstable and signal quality deteriorates
Solution Approach 1:
The patent employs curved trajectories instead of sharp angular changes when moving the probe to measurement positions. This curvature in the movement path allows the probe to change direction smoothly, maintaining orientation stability and signal quality while still achieving rapid response. The control system calculates optimal curved paths that minimize both time and orientation disruption.
3Speed
If the probe moves along a direct straight-line trajectory, then the movement distance is minimized and speed is improved, but the probe orientation becomes unstable during direction changes
Solution Approach 1:
The system dynamically adjusts the trajectory from a simple straight line to an optimized curved path that balances speed and stability. The control unit calculates trajectories that incorporate smooth direction changes, maintaining probe orientation stability while minimizing overall movement time. This dynamic trajectory optimization resolves the contradiction between direct movement and stable orientation.
Data Source
AI summary
An acoustic wave acquisition apparatus moves a probe so that, in a case where a distance between a probe positioned at a first point and a second point corresponding to a target position is below a predetermined threshold value, a ratio of a length of a trajectory to a distance between the first point and the second point is larger than in a case where the distance between the probe and the second point exceeds the predetermined threshold value.