Floating Sensor Assembly for Geometric Stability
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Solution Overview
Problem
Machine-vision-enabled user portable devices face accuracy issues due to deformation of the device chassis under normal user handling, which disrupts the fixed geometric configuration of sensors, impacting the accuracy of visual inertial sensing and stereoscopic vision functionalities.
Innovation Solution
A floating sensor assembly with a rigid mount and mechanical isolation from the device chassis using flexible mounting fasteners, such as adhesive foam or mechanical joints, allows the sensors to maintain their baseline geometric configurations even during chassis deformation, preventing torque-induced deformation and ensuring accurate sensor data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are rigidly mounted to the device chassis, then the geometric configuration is stable, but the device chassis deformation under user handling causes accuracy degradation
Solution Approach 1:
The patent divides the sensor mounting system into separate components: a floating sensor assembly that is mechanically isolated from the device chassis using compliant mounting elements. This segmentation allows the sensor assembly to maintain its geometric configuration independently from chassis deformations, resolving the contradiction between measurement precision and structural stability.
Solution Approach 2:
The patent introduces compliant mounting elements (such as adhesive foam or flexible brackets) as intermediaries between the sensor assembly and the device chassis. These intermediaries absorb mechanical stresses and prevent chassis deformations from being transmitted to the sensors, thereby maintaining geometric configuration stability while allowing the chassis to flex under user handling.
2Stability of the object's composition
If the device chassis is made more rigid to prevent deformation, then geometric configuration stability improves, but device weight and size increase
Solution Approach 1:
The patent extracts the function of maintaining geometric configuration stability from the device chassis itself and transfers it to a dedicated floating sensor assembly with compliant mounting. This allows the chassis to remain lightweight and flexible while the sensor assembly independently maintains its geometric configuration, resolving the contradiction between structural stability and device weight.
3Measurement precision
If compliant mounting elements are used to isolate sensors from chassis deformation, then sensor accuracy is maintained, but device complexity increases
Solution Approach 1:
The patent employs flexible mounting elements such as adhesive foam tapes or thin flexible brackets to mechanically isolate the sensor assembly from the device chassis. These simple flexible components provide sufficient compliance to maintain sensor geometric configuration while adding minimal complexity to the overall device structure, resolving the contradiction between measurement precision and device complexity.
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 floating sensor assembly effectively maintains the baseline geometric configurations of machine-vision sensors, enhancing the accuracy of visual inertial sensing and stereoscopic vision functionalities while adhering to cost, size, and weight constraints.
Implementation Method 1
a mounting fastener that permits translation of the floating sensor assembly in one or more directions relative to the device chassis
Data Source
AI summary
A user portable device includes a device chassis comprising at least one opening at a surface of the device chassis and a sensor assembly aligned with the at least one opening. The sensor assembly includes a mounting structure and a plurality of sensors mounted to the mounting structure. The sensors include at least two sensors utilized by the user portable device based on a specified geometric configuration between the at least two sensors. The user portable device further includes a mounting fastener that mounts the sensor assembly to the device chassis so as to isolate the sensor assembly from deformation of the surface of the device chassis along one or more axes during user handling, and thus aid in preventing alteration of a baseline geometric configuration of one or more sensors of the sensor assembly due to the chassis deformation.