Corona Poling Fixture With Surface Potential Feedback
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Solution Overview
Problem
Conventional corona poling systems lack a robust mechanism for monitoring the poling process, are limited to room temperature, and restrict the area that can be poled at once, increasing the time required to pole an entire sample.
Innovation Solution
A system comprising a platen-mounted piezoelectric sample that moves between a corona source and an electrostatic voltmeter, allowing for controlled corona exposure and surface potential measurement, with a corotron as the corona source to treat a larger area efficiently and uniformly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wire tip is used to generate corona for poling, then the setup is simple, but the area of sample that can be poled at a given time is limited
Solution Approach 1:
The corona source is segmented into multiple wire tips arranged in an array configuration, allowing simultaneous poling of larger sample areas. Each wire tip acts as an independent corona generation point, collectively covering a broader area than a single tip could achieve.
Solution Approach 2:
The corona source transitions from a single-point (0D) wire tip to a two-dimensional array of wire tips, expanding the effective corona generation area. This dimensional expansion enables parallel processing of larger sample areas, directly addressing the limitation of small poling area.
2Measurement precision
If conventional corona poling is performed at room temperature, then the equipment is simple, but the poling process lacks monitoring capability
Solution Approach 1:
An electrostatic voltmeter is integrated into the system to provide real-time feedback on the surface potential of the sample during the poling process. This allows monitoring and verification of poling effectiveness, enabling process optimization and quality control.
Solution Approach 2:
The stage system is designed to perform multiple functions: it positions the sample for corona exposure, moves the sample to measurement positions, and coordinates the operation of both the corona source and electrostatic voltmeter. This multi-functionality reduces the need for separate dedicated mechanisms for each operation.
3Productivity
If a single wire tip is used for corona generation, then the device is simple, but the processing speed is slow due to limited area coverage
Solution Approach 1:
The corona source is divided into multiple wire tips arranged in an array, with each tip contributing to the overall poling effect. This segmentation allows parallel processing of different regions of the sample, significantly increasing processing speed compared to a single tip.
Solution Approach 2:
Multiple wire tips are combined into a single integrated corona source array, functioning as one unified poling device. The combined effect of all wire tips provides both increased area coverage and faster processing, while maintaining a compact and manageable device structure.
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 and efficient poling of piezoelectric materials by monitoring the process, allowing for temperature control and faster processing of larger areas with improved uniformity, reducing overall poling time.
Implementation Method 1
A corona source generates a corona to which the sample is exposed when the platen is moved to the first position by the stage
Implementation Method 2
An electrostatic voltmeter having a probe measures a surface potential of the sample when the platen is moved to the second position by the stage
Data Source
AI summary
An apparatus 10 for poling piezoelectric material includes a platen 22 which holds a sample 20 of piezoelectric material to be poled and a stage 30 to which the platen is mounted. The stage 30 is arranged to selectively move the platen 22 and thereby the sample 20 which the platen 22 holds. The platen 22 is movable by the stage 30 selectively between a first position and a second position. A corona source 40 generates a corona to which the sample 20 is exposed when the platen 22 is moved to the first position by the stage 30. An electrostatic voltmeter 60 having a probe 62 measures a surface potential of the sample 20 when the platen 22 is moved to the second position by the stage 30.