Ultrasonic Sensor Shield Openings for Accurate Wave Detection
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Solution Overview
Problem
Existing ultrasonic devices face challenges in maintaining detection accuracy due to multiple reflections of ultrasonic waves by protectors and shield units, leading to reduced performance.
Innovation Solution
The ultrasonic device incorporates a design with a transmission surface, wiring, a shield, a holder, and a protector, where the shield and holder have openings aligned with the transmission surface to minimize multiple reflections, and a filter is used to separate noise from the reception signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shield unit and protector are added to cover wiring and protect the ultrasonic element, then reliability and protection are improved, but multiple reflections of ultrasonic waves occur causing detection accuracy to deteriorate
Solution Approach 1:
The invention extracts the harmful reflective surfaces from the ultrasonic wave path by providing openings in both the shield unit and protector. The shield opening and protector opening create a clear path for ultrasonic waves, removing the sources of multiple reflections while maintaining the protective function of the shield and protector for the wiring and ultrasonic element.
2Measurement precision
If the shield and holder are designed with openings to reduce reflections, then detection accuracy is improved, but structural protection and wiring coverage are reduced
Solution Approach 1:
The shield and holder are designed with local openings at specific positions where ultrasonic waves need to pass through, while the rest of the shield and holder structure maintains its protective function. The openings are strategically placed to allow ultrasonic wave transmission while the shield continues to cover and protect the wiring in other areas.
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 detection accuracy by reducing noise interference, thereby improving the reliability of ultrasonic wave detection.
Implementation Method 1
an ultrasonic element that has a transmission surface transmitting an ultrasonic wave and that transmits the ultrasonic wave in a direction intersecting the transmission surface
Implementation Method 2
a shield covering the wiring; a holder arranged at a shield outer circumference of the shield and extending in the direction; and a protector facing the transmission surface and having a hole through which the ultrasonic wave passes. The shield is provided with a shield opening that faces the transmission surface. The holder is provided with a holder opening that faces the transmission surface
Data Source
AI summary
An ultrasonic device includes: an ultrasonic element that has a transmission surface transmitting an ultrasonic wave and that transmits the ultrasonic wave in a direction intersecting the transmission surface; a wiring arranged at a transmission surface outer circumference of the transmission surface and coupled to the ultrasonic element; a shield covering the wiring; a holder arranged at a shield outer circumference of the shield and extending in the direction; and a protector facing the transmission surface and having a hole through which the ultrasonic wave passes. The shield is provided with a shield opening that faces the transmission surface. The holder is provided with a holder opening that faces the transmission surface. The protector is arranged at the holder opening.