Shock Assembly Hall Sensing for Internal Floating Piston Position
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Solution Overview
Problem
Conventional shock assemblies face difficulties in determining and monitoring the position and speed of piston rods, which are crucial for effective damping performance.
Innovation Solution
A shock assembly incorporating a damper chamber, piston rod, damping piston, internal floating piston, magnetic element, and hall sensors to determine the position of the internal floating piston, utilizing a processor to calculate the position of the piston rod based on readings from multiple hall sensors and temperature sensors to account for fluid expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional shock assemblies are used without sensors, then the structure remains simple, but the ability to determine and monitor piston rod position and speed is insufficient
Solution Approach 1:
The patent replaces mechanical position sensing methods with magnetic field-based Hall sensors. The magnetic element attached to the piston rod interacts with Hall sensors to detect position and speed electronically, eliminating the need for complex mechanical linkages or contact-based sensors, thus improving measurement precision while keeping the structural addition minimal.
Solution Approach 2:
The patent introduces a magnetic element as an intermediary between the moving piston rod and the stationary Hall sensors. This magnetic intermediary enables non-contact position detection, allowing the system to measure piston rod position and speed without direct mechanical contact, thereby maintaining structural simplicity while achieving accurate measurement.
2Measurement precision
If temperature compensation is not implemented, then the system remains simple, but fluid expansion effects on position measurement are not accounted for
Solution Approach 1:
The patent implements temperature compensation by using a temperature sensor to continuously monitor fluid temperature and feeding this information back to the processor. The processor then adjusts the position calculations based on thermal expansion coefficients, creating a closed-loop feedback system that maintains measurement accuracy across varying temperature conditions.
Solution Approach 2:
The patent accounts for temperature effects by dynamically adjusting the measurement parameters based on temperature sensor readings. The system changes the reference frame or calibration parameters according to fluid temperature, compensating for thermal expansion of the damping fluid and ensuring accurate position measurements across different operating temperatures.
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
Accurately determines the position and speed of the piston rod, enhancing damping performance by precisely monitoring the movement and temperature-dependent fluid dynamics.
Implementation Method 1
a first hall sensor configured to provide a first position reading of the internal floating piston based on a position of the magnetic element; a second hall sensor configured to provide a second position reading of the internal floating piston based on the position of the magnetic element
Implementation Method 2
shock assemblies, which conventionally include piston rods, internal floating pistons and damping fluid, the latter of the two being configured to damp movement of the piston rods
Data Source
AI summary
A shock assembly includes a damper chamber; a piston rod received in the damper chamber; a damping piston connected to the piston rod, moveable within the damper chamber, and defining first and second chamber portions; an internal floating piston defining a third chamber portion, being disposed between the second and third chamber portions, and being axially moveable between first and second positions; a fluid received in the first and second chamber portions; a pressuring unit received in the third chamber portion; a magnetic element connected to the internal floating piston; first and second hall sensors configured to respectively provide first and second position readings of the internal floating piston based on a position of the magnetic element; and a processor communicatively connected to the first and second hall sensors and being configured to determine a position of the internal floating piston based on the first and second position readings.