Pivoted Acceleration Sensor Strain Gauge Folding

The patent transitions from planar strain gauge arrangements to a three-dimensional folded configuration. The strain gauge is folded back and forth between fixed anchors, creating multiple layers that concentrate strain energy vertically and horizontally. This dimensional transformation allows the gauge to achieve higher effective length and strain concentration without increasing the device footprint, thereby overcoming manufacturing tolerance limitations while maintaining sensitivity.

The folded strain gauge structure nests multiple gauge sections within a compact volume. Each fold creates a nested arrangement where strain energy is concentrated through multiple layers of the gauge material. This nesting allows the gauge to achieve the required total length for adequate resistance and sensitivity while fitting within the constrained dimensions imposed by manufacturing tolerances and heat dissipation requirements.

The patent segments the strain gauge into multiple folded sections distributed between fixed anchors. Instead of a single continuous gauge, the structure divides the gauge into repeated segments that are strategically positioned to capture strain energy. Each segment contributes to the overall signal while the folded configuration ensures that strain energy is concentrated in the gauge material rather than being lost in uninstrumented areas.

The folded strain gauge structure creates local concentrations of strain energy at each fold and along the gauge path between anchors. The structure is designed so that the highest strain regions coincide with the gauge material location, ensuring that strain energy is locally captured and converted to electrical signal. This local quality optimization prevents energy loss in periphery and center areas by concentrating the gauge material precisely where strain energy is available.

The patent resolves the length conflict by transitioning to a three-dimensional folded gauge configuration. The gauge achieves its required effective length through vertical and horizontal folding rather than simple linear extension. This allows the gauge to obtain adequate total length for necessary resistance and sensitivity while maintaining a compact horizontal footprint that satisfies heat dissipation constraints. The folded structure efficiently packs gauge material into the available thermal management envelope.

The folded gauge structure dynamically adapts the gauge path to fit within thermal constraints. By folding the gauge back and forth between anchors, the structure maximizes the effective gauge length within the available space defined by heat dissipation requirements. The configuration allows the gauge to achieve optimal length for sensitivity while the compact folded arrangement ensures that heat generated by the gauge can be effectively dissipated through the substrate and anchors.