Piezoelectric Bending Actuator with Protective Housing
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Solution Overview
Problem
Piezoelectric bending transducers are highly sensitive to breakage, particularly during assembly, transport, and alignment in flexural transducer modules, leading to a high damage rate due to mechanical stresses.
Innovation Solution
A protective housing surrounds the flexural transducer element, with the fixed end directly mounted within the housing, reducing mechanical stress and eliminating the need for precise alignment of the transducer itself, as the housing is adjusted for correct positioning in the module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the piezoelectric bending transducer is used in a flexural transducer module, then the conversion of electronic information signals into mechanically scannable information signals is achieved, but the damage rate during assembly, transport, and alignment becomes unacceptably high
Solution Approach 1:
The system is divided into modular flexural transducer elements, each containing a protective housing with a flexural transducer. This segmentation allows the fragile transducer to be protected within its own module during assembly and transport, reducing the damage rate while maintaining the overall signal conversion capability of the flexural transducer module.
Solution Approach 2:
The protective housing is prepared in advance with mounting features and alignment structures. The flexural transducer is pre-installed and protected within the housing before the module assembly process begins, eliminating the need for delicate alignment operations on exposed transducers during final assembly.
2Adaptability or versatility
If the piezoelectrically active coating is applied to a flexible support body, then the bending transducer achieves the required flexibility and piezoelectric effect, but the sensitivity to breakage during handling increases
Solution Approach 1:
The protective housing is designed to surround and cushion the flexural transducer before any harmful mechanical stress can be applied during handling. The housing acts as a pre-established protective barrier that absorbs and distributes mechanical stresses, preventing breakage of the fragile piezoelectric coating while maintaining the flexibility needed for bending operation.
Solution Approach 2:
The protective housing is designed as a flexible or semi-flexible structure that can accommodate the bending motion of the flexural transducer while providing protective enclosure. This allows the transducer to maintain its flexibility for operation while being protected from external mechanical influences that cause breakage.
3Volume of moving object
If multiple bending transducers are combined in a small space in a flexural transducer module, then the compact design is achieved, but the risk of damage during insertion and alignment increases
Solution Approach 1:
Instead of assembling multiple exposed transducers into a compact module, the system uses pre-assembled flexural transducer elements with protective housings. Each element is a self-contained module that can be easily inserted into the final assembly without requiring delicate alignment of fragile components, reducing the damage risk during manufacturing while maintaining compact overall dimensions.
Solution Approach 2:
The protective housing acts as an intermediary structure that facilitates the combination of multiple transducers in a compact space. The housing provides a standardized interface and mounting structure that simplifies the assembly process, allowing multiple elements to be combined without requiring precise manual alignment of the fragile transducers themselves.
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 significantly reduces the damage rate of flexural transducers during assembly, transport, and alignment, while ensuring the transducer remains protected from external mechanical influences, allowing for safe handling and efficient installation.
Implementation Method 1
a piezoelectric bending transducer is also suitable for converting mechanical energy into electrical energy. Here, the direct piezoelectric effect is used.
Implementation Method 2
a piezoelectric bending transducer is also suitable for converting mechanical energy into electrical energy. Here, the direct piezoelectric effect is used.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a bending actuator element (1, 40) comprising a protective casing (3) and a bending actuator (4) accommodated therein, and a flat support (6) and a piezoelectrically active coating (7) applied to at least one side thereof. The bending actuator (4) is substantially enclosed by the protective casing (3) and is directly fastened in the protective casing (3) with its fixed end (9). The invention further relates to a bending actuator module (28) having a plurality of said bending actuator elements (1, 40). The fact that the bending actuator (4) is immobilized inside a protective casing (3) allows a unit that can be easily mounted, the risk of being damaged due to the destruction of the piezoelectric coating (7) during mounting or transport being substantially reduced compared to bending actuators of the prior art.