Flexible Dielectric Sensor Assembly for Cylindrical Aerosol Devices
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Solution Overview
Problem
Manufacturing sensors for aerosol-generating devices is challenging due to the need for a form factor that conforms to the shape of a conventional cigarette, particularly in housing electronic components like temperature sensors and controllers within a heating chamber.
Innovation Solution
A method involving a flexible dielectric substrate is used to create a 3D sensor by printing or mounting multiple sensor components at different locations and wrapping the substrate to form overlapping layers, creating a tubular structure that optimally surrounds the device's cavity, with components like resistors, capacitors, and microprocessors integrated via conductive tracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensor components are arranged on a flat substrate, then the sensor can detect multiple parameters, but the sensor occupies excessive space and cannot conform to the cylindrical cavity shape
Solution Approach 1:
The patent transitions from a 2D planar arrangement of sensor components to a 3D cylindrical configuration by wrapping the substrate around the cavity. Multiple sensor components are positioned at different angular locations (e.g., 0°, 120°, 240°) around the cavity, allowing simultaneous multi-parameter detection while minimizing the device's external footprint and conforming to the cylindrical geometry.
Solution Approach 2:
The sensor components are nested around the central cavity in a concentric arrangement. The flexible substrate is wrapped around the cavity with sensor components facing inward, creating a compact nested structure where the sensing elements are positioned in the annular space between the cavity and the device housing, thereby optimizing space utilization.
2Ease of manufacture
If electronic components are housed in a conventional cigarette-shaped device, then the device maintains a familiar form factor, but there is insufficient space to accommodate temperature sensors and controllers
Solution Approach 1:
The sensor system is segmented into multiple independent sensing zones positioned at different locations around the cavity. Each sensor component (temperature sensor, pressure sensor, airflow sensor) occupies a distinct angular sector, allowing parallel detection of multiple parameters without requiring a centralized bulky housing. This segmentation enables compact integration within the cylindrical form factor.
Solution Approach 2:
The patent utilizes the radial dimension around the cavity to distribute electronic components, rather than stacking them linearly along the device axis. By arranging sensors at different angular positions and radii, the design maximizes the use of three-dimensional space within the cylindrical housing, accommodating multiple components while maintaining a compact外形.
Data Source
AI summary
A method for manufacturing a sensor for an aerosol-generating device is provided, the sensor formed from at least three sensor components, the method including: providing a layer of a flexible dielectric substrate; printing or mounting a first sensor component on a first location of the flexible dielectric substrate; printing or mounting a second sensor component on a second location of the flexible dielectric substrate, the second location being different from the first location; printing or mounting a third sensor component on a third location of the flexible dielectric substrate, the third location being different from the second location and from the first location; and wrapping or folding the flexible dielectric substrate such that three layers of the flexible dielectric substrate are formed, such that the first location, the second location, and the third location overlie each other thereby forming the sensor.