Ultrasonic Sensor Calibration Through Region-Based Echo Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Manufacturing and attachment processes of ultrasonic sensors in display devices can lead to deviations, necessitating calibration to ensure accurate operation.
Innovation Solution
A method and system for calibrating ultrasonic sensors by transmitting ultrasonic signals, generating echo signals at multiple reception time points, detecting similar image portions, and storing corresponding parameters to improve image uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ultrasonic sensor calibration is performed using traditional methods, then the calibration process is simpler, but the image uniformity and detection precision are degraded
Solution Approach 1:
The calibration process is segmented by dividing the ultrasonic image into multiple regions and performing calibration operations on each region independently. This allows different calibration parameters to be applied to different areas of the sensor, improving image uniformity while maintaining a manageable calibration process through automated region-based processing.
Solution Approach 2:
The patent implements local quality by applying different calibration parameters to different regions of the ultrasonic sensor. Each region undergoes calibration tailored to its specific characteristics, resulting in improved overall image uniformity and detection precision across the entire sensor surface.
2Measurement precision
If multiple reception time points are used for calibration, then the detection precision is improved, but the calibration time and complexity increase
Solution Approach 1:
The system performs preliminary actions by pre-processing the ultrasonic images to identify regions of interest and pre-determining calibration parameters before the actual calibration execution. This preparation work enables the subsequent calibration process to proceed more efficiently, reducing the overall calibration time while maintaining high detection precision through multiple reception time points.
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
Enhances the clarity and recognition of ultrasonic images by directly calibrating each portion, ensuring consistent performance across the sensor's surface.
Implementation Method 1
transmitting a first ultrasonic signal from the ultrasonic sensor toward a first surface of a contact device... sampling a first ultrasonic echo signal, the first ultrasonic echo signal comprising a reflected signal of the first ultrasonic signal
Data Source
AI summary
A method for calibrating an ultrasonic sensor includes: transmitting a first ultrasonic signal from the ultrasonic sensor toward a first surface of a contact device when a model is on the first surface of the contact device; generating ultrasonic images by sampling a first ultrasonic echo signal, the first ultrasonic echo signal comprising a reflected signal of the first ultrasonic signal, at a plurality of reception time points; detecting portions of the ultrasonic images, wherein detected portions of the ultrasonic images are most similar to corresponding portions of a reference image of the model compared to other portions of the ultrasonic images having same positions as the detected portions and detected at different reception time points of the plurality of reception time points than the detected portions; and storing the reception time points corresponding to the detected portions of the ultrasonic images.