Bistable Vibration Harvester With Sliding Link for Reliable Conversion
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Solution Overview
Problem
Existing mechano-electric converters and vibration energy harvesters lack industrialization and reliability in mechanical vibration energy recovery.
Innovation Solution
A device with a sliding connection between a blade structure and a conversion device, utilizing a bistable system with a piezoelectric element, where the blade structure is connected to a fixed point and includes a mass in its central part, allowing for efficient energy conversion by oscillating between stable positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid fixed connection is used between the blade structure and the conversion device, then structural stability is improved, but stress concentration and reliability of electrical connections deteriorate
Solution Approach 1:
The fixed connection is segmented into a series of adjustable fastening elements distributed along the blade structure, allowing stress distribution and independent adjustment of connection points, thereby maintaining stability while reducing stress concentration on electrical connections
Solution Approach 2:
The connection system is made dynamically adjustable, allowing the fastening elements to be repositioned or adjusted during operation to accommodate varying stress conditions and vibration patterns, improving both stability and connection reliability
2Stability of the object's composition
If a complex fixed mounting system is used to secure the conversion device, then structural stability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The mounting system is divided into modular fastening elements that can be independently installed and adjusted, reducing overall complexity while maintaining structural stability through distributed attachment points
Solution Approach 2:
Instead of securing the entire conversion device at once with a complex system, the mounting is achieved through multiple simple fastening points that collectively provide sufficient stability with reduced individual complexity
3Stability of the object's composition
If the conversion device is rigidly mounted inside the frame, then structural stability is improved, but adaptability and ease of installation deteriorate
Solution Approach 1:
The mounting system allows dynamic reconfiguration of the conversion device position and orientation through adjustable fastening elements, enabling adaptation to different installation scenarios while maintaining structural stability during operation
Solution Approach 2:
The fastening system serves multiple functions including mechanical attachment, position adjustment, and stress distribution, making the mounting configuration adaptable to various requirements while ensuring structural stability
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 device enhances the reliability and flexibility of energy harvesting by reducing stress on electrical connections and allowing modular design, improving energy conversion efficiency and robustness.
Implementation Method 1
Some mechano-electric converters or vibration energy harvesters use piezoelectric elements to convert mechanical energy from vibrations into electricity
Implementation Method 2
A device with a sliding connection between a blade structure and a conversion device, utilizing a bistable system with a piezoelectric element, where the blade structure is connected to a fixed point and includes a mass in its central part, allowing for efficient energy conversion by oscillating between stable positions
Data Source
Figure 1~6
Figure 2~3
Figure 4~5
AI summary
The invention relates to a device (1) for recovering mechanical vibrational energy, comprising a bistable spring leaf structure (3) in a frame (2), and a sliding link (24') on a wall (24') of said frame between said structure and at least one mechanical-electrical conversion device (5) outside the frame.