Tire Pressure Sensor Elastic Compensation
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Solution Overview
Problem
Tire pressure monitoring system sensors face increased wear and tear due to significant forces during vehicle operation, leading to potential failure.
Innovation Solution
A tire pressure sensor design featuring a stacked arrangement of electronic circuit board and battery with an elastic compensating element made from electrically insulating material, such as closed-cell foam, which reduces mechanical stress and prevents the battery from hitting the circuit board, using contact elements with strain relief to absorb movements and maintain snug contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery is rigidly fixed to the circuit board, then the electrical connection is stable, but the mechanical stress during vehicle operation causes wear and tear and failure of the sensor
Solution Approach 1:
The patent changes the mechanical parameter of the connection between battery and circuit board from rigid to elastic by introducing a compensating element made of elastic material. This allows the connection to maintain electrical contact while accommodating mechanical stresses through elastic deformation, thereby preventing failure under centrifugal forces during vehicle operation.
Solution Approach 2:
The patent introduces an elastic compensating element as an intermediary component between the battery and the circuit board. This mediator absorbs mechanical stresses and movements, preventing direct transmission of forces that would otherwise cause wear and failure of the electrical connection, while maintaining stable electrical contact.
2Strength
If the battery is allowed to move freely in the housing, then the mechanical stress on contacts is reduced, but the battery may hit the circuit board under centrifugal forces
Solution Approach 1:
The patent implements beforehand cushioning by positioning the elastic compensating element between the battery and circuit board before operation. This compensating element is pre-configured to absorb and dampen centrifugal forces that occur during vehicle operation, preventing the battery from hitting the circuit board while maintaining electrical connection reliability.
3Reliability
If a rigid support structure is used to hold the battery, then the electrical connection is stable, but the sensor cannot withstand the considerable forces during driving
Solution Approach 1:
The patent changes the mechanical parameter of the support structure from rigid to elastic by using an elastic compensating element. This allows the support to maintain electrical connection stability while simultaneously withstanding centrifugal forces through elastic deformation, converting the harmful rigid constraint into a beneficial energy-absorbing mechanism.
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 solution enhances the resistance and reliability of tire pressure monitoring sensors by minimizing mechanical stress and preventing electrical contact failures, ensuring reliable operation under centrifugal forces.
Implementation Method 1
an elastic compensating element (8) is arranged between the battery (7) and the circuit board (6)... The elastic compensating element ensures that movement of the battery relative to the circuit board is only possible to a limited extent and only in a damped manner, namely when the compensating element is deformed
Implementation Method 2
Such closed-cell foams prevent moisture from penetrating into the compensating element and possibly generating electrical contact and faulty switching
Data Source
Figure 1a~2
Figure 3~5
AI summary
The invention relates to a pressure sensor (1) for a tyre pressure monitoring system (TPMS) comprising a housing (5a, 5b) formed by at least two housing parts. A printed circuit board (6) has electronic components arranged thereon, wherein the electronic components form at least one circuit for detecting a gas pressure and a wireless transmission of measurement data to a remote receiving device. A battery serves to supply the electronic components. The battery (7) and the printed circuit board (6) are arranged in a stack and accommodated in the housing (5a, 5b). An elastic compensation element (8) made of an electrically insulating material is placed between the battery (7) and the printed circuit board (6), said elastic compensation element respectively abutting the battery (7) and the printed circuit board (6) on one side. The battery is supported on the housing (5a, 5b) on a side facing away from the compensation element.