Piezoelectric Position Testing via Airflow Inversion
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Solution Overview
Problem
Existing position testing apparatuses are unable to accurately and reliably test the positioning state of small, light, and thin plate-like objects like piezoelectric elements without causing them to be blown away or shifted.
Innovation Solution
A position testing apparatus featuring a stage with through holes and a flow measurement unit that draws air through the holes to determine the positioning state of the plate-like object based on the flow rate, ensuring precise positioning and testing without direct contact or clamping, which uses a pushing unit to gently guide the object to the target position using air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If air is blown on the plate-like object to test positioning state, then the positioning state can be determined according to flow rate, but the light object is blown away and cannot be surely tested
Solution Approach 1:
Instead of blowing air ON the object to test positioning (which blows the object away), the invention draws air THROUGH the stage from UNDER the object. The flow measurement unit draws air through the through hole in the stage, and the positioning state is determined according to the flow rate of air drawn through the stage. This inverted approach allows reliable testing without blowing the light object away.
2Manufacturing precision
If direct contact or clamping is used to position the plate-like object, then positioning can be achieved, but the object may be damaged or scattered
Solution Approach 1:
The invention replaces mechanical contact and clamping systems with a pneumatic system. The pushing unit pushes the plate-like object along the guide groove using air pressure, and the flow measurement unit draws air through the stage to determine positioning state. This substitution of mechanical systems with pneumatic ones allows precise positioning and testing without direct contact that could damage or scatter the fragile object.
Solution Approach 2:
The invention introduces air flow as an intermediary medium to achieve positioning and testing. The pushing unit uses air pressure as an intermediary force to push the object along the guide groove, and the flow measurement unit uses air flow as an intermediary to detect the positioning state. This intermediary approach avoids direct mechanical contact while maintaining positioning accuracy and object safety.
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
The apparatus effectively and accurately tests the positioning state of small, light, and thin plate-like objects, preventing scattering or shifting, and allows for precise determination of the positioning state without damaging the objects, even with shape variations.
Implementation Method 1
a flow measurement unit configured to draw air through the through hole from around the plate-like object and determine the positioning state of the plate-like object according to a flow rate of the drawn air
Implementation Method 2
a pushing unit configured to push the plate-like object along the guide groove in a plan view to a target position corresponding to the through hole
Data Source
AI summary
A position testing apparatus includes a stage on which a piezoelectric element object is set, a through hole formed through the stage and covered with the piezoelectric element set on the stage according to a positioning state, and a flow measurement unit configured to draw air through the through hole from around the piezoelectric element and determine the positioning state of the piezoelectric element according to a flow rate of the drawn air. The position testing apparatus is capable of surely testing a positioning state of the piezoelectric element.