Piezoelectric Microgenerator Mounted on Printed Circuit Board
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Solution Overview
Problem
Existing tire modules with microgenerators inside tires face issues with mechanical robustness due to separate arrangement of microgenerators and printed circuit boards, leading to potential detachment under acceleration forces and risk of connecting wire rupture.
Innovation Solution
The tire module integrates a piezoelectric microgenerator as a surface-mounted component directly on the printed circuit board, using supple metal contact lugs for secure electrical connection and a rigid housing to prevent damage, minimizing the need for long connecting wires and enhancing mechanical attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the microgenerator and printed circuit board are arranged separately and connected by conventional connecting wires, then the electrical connection can be established, but the connecting wires are subjected to acceleration forces that can result in wire rupture and detachment
Solution Approach 1:
The microgenerator is integrated directly onto the printed circuit board as a surface-mounted component, eliminating the need for separate arrangement and connecting wires. This merging of components resolves the technical contradiction by removing the fragile wire connections that were susceptible to acceleration forces, while maintaining the electrical connection function through direct mounting contacts.
2Strength
If conventional connecting wires are used to connect the microgenerator and printed circuit board, then electrical connection is achieved, but the wires are prone to tearing under tire acceleration forces
Solution Approach 1:
By integrating the microgenerator directly onto the printed circuit board, the invention eliminates the vulnerable wire connections. The microgenerator and printed circuit board become a unified structure that can withstand acceleration forces without the risk of wire rupture, thereby resolving the contradiction between connection strength and resistance to acceleration forces.
3Reliability
If the piezoelectric transducer is mounted as a surface-mounted component directly on the printed circuit board, then mechanical robustness is improved, but the mounting process requires precise electrical connection
Solution Approach 1:
The surface-mounted component integration merges the microgenerator with the printed circuit board into a single robust unit. This approach improves mechanical robustness by eliminating separate mounting hardware and long connecting wires, while the precision requirements are managed through standard surface-mount technology processes that ensure reliable electrical connections during manufacturing.
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 increases the robustness and durability of the tire module, reducing the risk of detachment and wire rupture, resulting in a longer-lasting module with improved energy conversion efficiency.
Implementation Method 1
a piezoelectric transducer (10) which is fitted as a surface-mounted component on the printed circuit board (6) and has a spring element (1) which can be stimulated into oscillation by changes in acceleration and has a seismic mass (2) arranged on a free end of the spring element (1) and piezoelectric material for converting the movement energy into electrical power
Data Source
AI summary
Tire module for the detection of tire state quantities which includes a printed circuit board and a piezoelectric transducer with a housing and at least one transducer element, wherein the transducer element is coupled to piezoelectric material or consists of piezoelectric material, and wherein the piezoelectric transducer is executed as a surface-mounted device (SMD) and as such is mounted on the printed circuit board by terminal areas and is electrically connected to the printed circuit board.