Rotating Piezoelectric Surface Roughness Sensor
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Solution Overview
Problem
Existing surface roughness measurement methods, such as optical and stylus methods, face challenges in precision, especially when measuring moving objects or those with smooth surfaces, and risk damaging the object due to contact.
Innovation Solution
A surface roughness sensor apparatus featuring a rotatable rotation shaft with a piezoelectric sensor that generates sensing signals upon contact, minimizing damage by rotating relative to the object's surface, allowing precise measurement regardless of surface smoothness or movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a stylus method is used to measure surface roughness, then measurement precision is improved, but the object surface may be damaged
Solution Approach 1:
The piezoelectric sensor is rotated relative to the object surface during measurement, creating dynamic motion that minimizes contact stress and prevents surface damage while maintaining measurement precision. The rotation shaft enables the sensor to move in a direction that reduces harmful contact effects.
2Device complexity
If an optical measurement method is used, then the structure is simpler, but measurement precision is reduced
Solution Approach 1:
The patent replaces optical measurement methods with a mechanical piezoelectric sensor-based system. The piezoelectric sensor directly contacts the surface and converts mechanical pressure into electrical signals, providing higher precision measurements while maintaining reasonable structural complexity.
3Device complexity
If the piezoelectric sensor is stationary, then the structure is simpler, but measurement precision is reduced for moving objects
Solution Approach 1:
The piezoelectric sensor is mounted on a rotatable shaft that allows it to rotate relative to the object surface. This dynamic configuration enables the sensor to maintain optimal contact conditions when measuring moving objects, ensuring measurement precision without requiring a complex multi-sensor system.
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 precise surface roughness measurement while minimizing damage to the object, regardless of its surface smoothness or movement, by using a piezoelectric sensor rotated in a direction that minimizes contact stress and allows for accurate data collection.
Implementation Method 1
a piezoelectric sensor provided along a circumference of the rotation shaft, rotated by rotation of the rotation shaft, and configured to generate a sensing signal in response to a pressure applied by a surface of an object as being in direct contact with the surface of the object
Data Source
AI summary
The present disclosure relates to a surface roughness sensor apparatus. The surface roughness sensor apparatus includes: a rotatable rotation shaft; a piezoelectric sensor provided along a circumference of the rotation shaft, rotated by rotation of the rotation shaft, and configured to generate a sensing signal in response to a pressure applied by a surface of an object as being in direct contact with the surface of the object; and a signal transfer unit configured to transfer the sensing signal generated and transmitted by the piezoelectric sensor to the outside of the sensor apparatus, and the piezoelectric sensor may be rotated in a direction in which a relative movement between the piezoelectric sensor and the surface of the object is made at a contact point with the object to minimize damage to the surface of the object.