Encased Pressure Sensor Thermal Segmentation

The device segments the measurement system into two distinct environments: a first volume exposed to the high-temperature wheel interior where particles are filtered, and a second volume protected from temperature extremes where the pressure sensor operates. This spatial segmentation allows the sensor to measure pressure accurately while being shielded from thermal interference.

The patent introduces intermediate elements including a thermal barrier wall separating the first and second volumes, and a series of filtering channels that mediate between the hot external environment and the protected sensor environment. These intermediaries transfer pressure information while blocking temperature effects.

The device employs a nested structure where the pressure sensor is housed within an inner volume that is itself contained within an outer housing. Multiple protective layers including filtering channels, thermal barriers, and sealing elements are nested between the sensor and the external wheel environment, creating concentric protection zones.

The patent implements protective measures beforehand by placing particle filters in the fluid communication path before particles can reach the sensor, and by creating thermal barriers that cushion the sensor from temperature shocks before they can affect measurement accuracy.

The patent replaces the need for expensive heat-resistant materials with a thermal barrier architecture that uses ordinary materials arranged in a protective configuration. Instead of making the sensor itself heat-resistant, the system substitutes a thermal isolation structure that blocks heat from reaching the sensor, using common materials in a novel arrangement.

The device employs thin film heaters and flexible thermal barrier structures that provide effective temperature protection while being cost-effective to manufacture. The thin film heating elements can prevent freezing without requiring heavy insulation, and the flexible barriers adapt to the compact sensor housing.

The fluid communication path is segmented into multiple sequential channels with progressively smaller diameters. The first channel has a larger diameter for rapid fluid flow and pressure equalization, while subsequent channels have progressively smaller diameters that act as mechanical filters, trapping particles before they can reach the sensor.

Different channel sections have different diameters optimized for their specific functions: the initial channel has a larger diameter for fast pressure response, while the terminal channels near the sensor have smaller diameters for particle filtration. This local variation in geometric quality allows simultaneous optimization of both response speed and filtering effectiveness.