Head-Mounted Clamping Force Measurement Using Pneumatic Pressure Sensing
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Solution Overview
Problem
Existing methods for measuring clamping force in head-mounted devices, such as headsets, are inaccurate due to the loss of extrusion force when the connection rod moves through a metal plane, leading to inconsistent and uncomfortable fitting.
Innovation Solution
A clamping force measurement system that converts volume change into pressure change using hollow compressible units and a gas guide device, coupled with a pressure sensing module to determine clamping force accurately, allowing for uniform distribution adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a connection rod and metal plane are used to measure clamping force, then the measurement structure is simple, but the measurement precision deteriorates due to force loss during rod movement
Solution Approach 1:
The patent replaces the traditional mechanical connection rod and metal plane system with a pneumatic measurement system. Hollow compressible units filled with gas transmit force information through pressure changes, eliminating the mechanical contact and movement that caused force loss. This substitution maintains structural simplicity while dramatically improving measurement precision by avoiding friction and extrusion force loss.
Solution Approach 2:
The patent uses gas-filled hollow compressible units as the core measurement element. When clamping force is applied, the volume change of the hollow unit causes corresponding pressure changes in the enclosed gas, which are then measured by pressure sensors. This pneumatic approach eliminates the need for mechanical connection rods moving through metal planes, thereby preventing force loss and improving measurement accuracy.
2Ease of manufacture
If a connection rod moves through a metal plane to transmit force, then the structure is straightforward, but the loss of extrusion force occurs leading to inaccurate measurement
Solution Approach 1:
The patent replaces the mechanical force transmission system (connection rod through metal plane) with a pneumatic system using gas-filled hollow compressible units. This substitution eliminates the mechanical friction and extrusion force loss that occurred in the traditional system, while the manufactured simplicity is maintained through the use of standard pressure sensing components and flexible hollow units.
Data Source
AI summary
Provided are a clamping force measurement system and method for a head-mounted device. The clamping force measurement system for a head-mounted device includes a pressure sensing module and a measurement module. The measurement module includes at least two measurement device and at least one gas guide device. A measurement device includes at least one hollow compressible unit. The measurement device is configured to discharge gas when the volume of the measurement device is deformed during extrusion. A first end of a gas guide device is in communication with a measurement device. A second end of the gas guide device is in communication with the pressure sensing module to transmit the gas to the pressure sensing module. The pressure sensing module is configured to determine the clamping force of the head-mounted device according to the pressure value of the gas.