Optical Probe Positioning for Ultrasonic Microscopy Scanning
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Solution Overview
Problem
Traditional ultrasonic microscopy positioning methods rely heavily on human eye estimation, leading to inaccurate and time-consuming scanning, especially for samples with ambiguous dimensions, resulting in increased scanning time and reduced efficiency, particularly in large-scale production environments.
Innovation Solution
A three-axis scanning driving device combined with two cameras for optical assistance, allowing precise XY plane positioning and real-time distance measurement between the ultrasonic probe and the sample, using projection matrices and triangular similarity principles to ensure accurate and efficient scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional human eye-based positioning method is used, then the device complexity is low, but the positioning accuracy and detection efficiency are poor
Solution Approach 1:
The patent introduces an optical imaging system (camera) as an intermediary between the operator and the ultrasonic probe positioning. The camera captures real-time images of the probe and sample, which are then processed to calculate precise probe position and distance information, serving as a mediator that translates visual information into quantitative positioning data.
Solution Approach 2:
The patent replaces the mechanical/manual positioning method (operator visually estimating position and manually adjusting probe location) with an optical measurement system. The camera-based system automatically calculates probe position coordinates and distance to sample, substituting manual mechanical adjustment with automated optical measurement and calculation.
2Productivity
If manual positioning by operator is used, then the device complexity is low, but the detection efficiency and productivity are reduced
Solution Approach 1:
The patent implements a feedback mechanism where the camera continuously captures probe position information, the system calculates the probe's real-time location and distance to sample, and this information is fed back to guide probe positioning. This closed-loop feedback system enables automated positioning control, significantly improving detection efficiency.
Solution Approach 2:
The optical positioning system enables the equipment to perform self-positioning. The camera automatically tracks the probe position, calculates coordinates and distance, and provides positioning guidance without requiring continuous manual intervention from the operator, allowing the system to serve itself in the positioning task.
3Measurement precision
If scanning range is increased to ensure complete sample coverage, then the positioning accuracy is improved, but the scanning time and loss of time are increased
Solution Approach 1:
The patent performs preliminary positioning action by using the camera to capture probe position and sample location before scanning begins. The system calculates the optimal scanning range based on the actual sample position and dimensions, allowing the operator to set an accurate scanning range in advance that ensures complete coverage without unnecessary extensions, thereby reducing scanning time.
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
Enables fast, accurate, and simple probe positioning, reducing human error and time consumption by providing real-time image feedback and enabling operators to set optimal scanning ranges without repeated adjustments, thus enhancing detection efficiency.
Implementation Method 1
A first camera device is mounted directly above an ultrasonic microscope... the first camera device... enables XY plane positioning of an ultrasonic probe
Implementation Method 2
a second camera device is mounted directly in front of the ultrasonic microscope... the second camera device... enables distance measurement between an ultrasonic probe and a sample
Implementation Method 3
An ultrasonic microscope generates and emits ultrasonic waves by exciting an ultrasonic probe, and these pulse waves are transmitted to the tested sample through a coupling medium
Data Source
AI summary
Disclosed is an auxiliary positioning method for an ultrasonic microscope based on optical imaging, including a three-axis scanning driving device, an ultrasonic probe, and a first camera device and a second camera device for optical assisted positioning. The first camera device realizes an XY plane positioning of an ultrasonic probe using a projection matrix. A point is selected on a displayed image of the second camera device right in front, and a distance between the ultrasonic probe and a sample is obtained in real time. The XY coordinate positioning of the ultrasonic probe on a two-dimensional plane of a water tank platform and the measurement of a distance between the ultrasonic probe and the sample in a Z direction can be realized, a position of the ultrasonic probe is conveniently positioned, and an operator's concern about whether the probe collides with the sample during operation is solved.