Sensor Module Casing Stabilizes Circuit Board Position
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Solution Overview
Problem
The assembly of sensor modules for detecting vibrational behavior in mechanical components, such as vehicle wheel bearings, is hindered by the inconsistent positioning of circuit boards due to varying contact areas, leading to instability and component waste during production.
Innovation Solution
A sensor module design featuring a casing with three equidistant contact areas to stabilize the circuit board, along with spacers and a potting material to secure the board within the casing, facilitating a stable assembly process and reducing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If six contact areas are used in the casing, then the circuit board can be housed inside the casing, but the position of the circuit board becomes unstable and random during assembly
Solution Approach 1:
The contact areas are segmented into exactly three specific locations on the casing base, each serving as a discrete support point. This segmentation provides defined positioning zones that guide the circuit board into a precise, repeatable position during assembly, eliminating the randomness caused by having six unstructured contact areas.
Solution Approach 2:
The three contact areas are positioned at specific locations: one at the front of the base and two at the rear of the base. This local differentiation creates asymmetric support points that naturally guide the circuit board into a unique, stable position, improving manufacturing precision while maintaining structural simplicity.
2Ease of manufacture
If multiple contact areas are provided in the casing, then the circuit board can be supported, but the assembly process becomes unstable and non-repetable
Solution Approach 1:
The support structure is segmented into three discrete contact areas rather than multiple continuous or distributed contact zones. This segmentation creates distinct, identifiable positioning points that make the assembly process more stable and repeatable, as each contact area serves a specific function in locating the circuit board.
Solution Approach 2:
The number of contact areas is changed from six to three, and their positions are specifically defined (one at front, two at rear). This parameter change simplifies the assembly process while improving reliability, as fewer, well-defined contact points are easier to manufacture consistently and provide more stable positioning than multiple contact areas.
3Device complexity
If the circuit board is positioned in a hyperstatic state, then it can be housed in the casing, but component waste increases due to sorting requirements
Solution Approach 1:
The three contact areas are segmented into specific positions (one front, two rear) that create a natural, stable resting position for the circuit board. This segmentation eliminates the hyperstatic condition by providing exactly enough support points to stabilize the board without over-constraint, allowing consistent assembly without post-production sorting and reducing component waste.
Solution Approach 2:
The contact areas are positioned with specific local qualities: one at the front edge and two at the rear edge of the base. This local differentiation creates an asymmetric support configuration that naturally orients the circuit board in the correct position, eliminating the need for sorting operations and reducing component loss.
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 ensures a stable and efficient assembly process, reducing component waste and improving the reliability of vibrational data transmission from mechanical components.
Implementation Method 1
the circuit board comprises a piezoelectric vibration sensor
Data Source
AI summary
A sensor module (8) is disclosed for detecting a mechanical vibration of a component. The sensor module (8) includes a base (10) to be secured on the component. A circuit board (12) is mechanically connected to the base (10). The circuit board (12) has a first side (16) facing the base (10) and a second side (18) facing away from the base (10). A casing (34) inside which is housed the circuit board (12). The casing (34) includes only three contact areas against which the second side (18) of the circuit board (12) abuts.