Pressure-Sensing Seat Post Valve for Faster Height Adjustment
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Solution Overview
Problem
Current bicycle seat post height adjustment systems, such as hydraulic dropper seat posts, suffer from slow reaction times due to design limitations in internal fluid flow components.
Innovation Solution
A seat post assembly with a valve including an isolator that moves between closed and open positions, controlled by a pressure sensor and controller, allowing for precise adjustment of seat post height based on measured pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If manual operation or wireless communication is used to adjust seat post height, then the rider can control saddle height during riding, but the reaction time remains slow due to design limitations in internal fluid flow components
Solution Approach 1:
The patent extracts and eliminates the complex internal fluid flow components from the seat post assembly. By removing these problematic components, the system achieves faster reaction times while maintaining the height adjustment functionality through a simplified mechanical design with first and second tubes that slide relative to each other.
Solution Approach 2:
The patent replaces the hydraulic/pneumatic fluid flow system with a direct mechanical sliding mechanism. The first tube and second tube slide relative to each other to establish adjustable distance, eliminating the need for complex fluid flow components and achieving faster response to rider input.
2Stability of the object's composition
If the isolator is in the closed position to prevent relative movement between tubes, then seat post height is stabilized, but the pressure builds up in the chambers
Solution Approach 1:
The patent employs a pressure sensor that continuously monitors the pressure in the first or second chamber and provides feedback to the controller. The controller uses this pressure information to determine when to transition the isolator from closed to open position, preventing excessive pressure buildup while maintaining height stability during normal operation.
Solution Approach 2:
The isolator transitions from a static closed position to a dynamic system where it can switch between closed and open states based on pressure conditions. This dynamic behavior allows the system to maintain stability when needed while releasing pressure when necessary, balancing both requirements.
3Speed
If the isolator moves quickly between open and closed positions for fast adjustment, then reaction time improves, but control precision may be compromised
Solution Approach 1:
The pressure sensor provides continuous feedback on the pressure conditions in the chambers, allowing the controller to precisely control when the isolator should transition between open and closed positions. This feedback mechanism ensures that even though the isolator moves quickly, the height control remains precise by basing transitions on actual pressure measurements rather than timing alone.
Solution Approach 2:
The patent replaces complex mechanical flow control components with an electronic control system that uses pressure sensor feedback. This substitution allows for both fast isolator movement and precise control, as the electronic system can rapidly process pressure information and actuate the isolator at the exact moment needed for precise height adjustment.
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 system enables faster and more accurate adjustment of seat post height, preventing unwanted changes and improving rider comfort by allowing active control of saddle positioning based on pressure feedback.
Implementation Method 1
a pressure sensor configured to measure a pressure of a fluid within the first chamber or the second chamber
Implementation Method 2
manually actuated hydraulic height adjustable or 'dropper' seat posts may use a hydraulic pressure differential within the post
Data Source
AI summary
A seat post assembly includes a seat post that is electrically adjustable in height. The adjustability may be based on one or more pressures sensed by one or more sensors within the seat post assembly, respectively. The disclosed seat post assembly includes an electronics module. The electronics module may be carried under the seat or saddle and may include a pressure sensor or pressure sensor circuitry.