Rigid Force Conductor Enhances Pressure Sensing Accuracy
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Solution Overview
Problem
Traditional pressure sensing devices in touch devices, such as mobile phones, suffer from poor sensitivity and accuracy in detecting force intensity due to assembly tolerances and limited deformable space, leading to deviations in detected force and reduced multi-level range of force intensity detection.
Innovation Solution
A pressure sensing device comprising a force sensor, a rigid force conductor, and a soft deformable object, where the rigid force conductor is placed between the force sensor and the soft deformable object to enhance force transmission and accuracy, with a pre-pressing force design to calibrate and improve linearity of the pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional mechanical pressure sensing device with spring deformation meter is used, then the device can detect force intensity, but the detection accuracy and sensitivity are poor due to assembly tolerances and limited deformable space
Solution Approach 1:
The patent introduces a rigid force conductor as an intermediary component between the force sensor and the deformable object. This rigid force conductor transmits force from the deformable object to the force sensor, eliminating the need for direct contact and thereby reducing the impact of assembly tolerances on detection accuracy. The rigid force conductor acts as a mediator that ensures precise force transmission regardless of minor misalignments in assembly.
Solution Approach 2:
The patent divides the force transmission path into separate functional components: a deformable object that deforms under force, a rigid force conductor that transmits the force, and a force sensor that detects the force. This segmentation allows each component to be optimized independently, with the rigid force conductor specifically designed to minimize the effects of assembly tolerances on overall detection accuracy.
2Measurement precision
If the contact area between the force sensor and deformable object is reduced to improve sensitivity, then the force detection sensitivity increases, but the detection range and accuracy are limited by assembly tolerances
Solution Approach 1:
The rigid force conductor serves as a stable intermediary that connects the deformable object to the force sensor. It maintains a consistent force transmission path that is insensitive to assembly variations, thereby ensuring detection stability and reliability even when the contact area is reduced to improve sensitivity.
Solution Approach 2:
The patent applies different properties to different parts of the system: the deformable object is designed to be compliant and deformable, while the rigid force conductor is designed to be rigid and dimensionally stable. This local differentiation of properties allows the system to achieve both high sensitivity (through small contact area) and high reliability (through the rigid force conductor's stability against assembly variations).
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 solution enhances the force detection range and accuracy, allowing for precise multi-level force intensity detection and improved sensitivity, while the pre-pressing force design ensures tighter component contact and reduces errors in pressure detection.
Implementation Method 1
a soft deformable object, wherein the rigid force conductor is disposed between the force sensor and the soft deformable object
Data Source
AI summary
A pressure sensing device is provided. The pressure sensing device includes a force sensor. The pressure sensing device further includes a rigid force conductor and a soft deformable object. The rigid force conductor is disposed between the force sensor and the soft deformable object.