Rocker Potentiometer Assembly for Linear Magnetic Sensing
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Solution Overview
Problem
Existing electromagnetic induction type potentiometers face issues with inaccurate positioning of magnetic sensing circuit boards, leading to reduced sensing accuracy, and rapid or slow changes in induction signals due to varying distances between permanent magnets and magnetic sensors during rotor rotation.
Innovation Solution
The electromagnetic induction type rocker potentiometer incorporates a magnetic sensing circuit board molded directly into the shell of each potentiometer assembly, ensuring precise and fixed positioning of the magnetic sensor. Additionally, the permanent magnets are fixedly installed to maintain a constant distance with the magnetic sensors, resulting in linear changes in magnetic strength and synchronized induction signal changes with rotor rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the magnetic sensing circuit board is installed externally and the shell is sleeved on the magnetic sensor, then the assembly process is simplified, but the positioning accuracy between the circuit board and shell becomes inaccurate, causing the magnetic sensor position to change and reducing sensing accuracy
Solution Approach 1:
The magnetic sensing circuit board is integrated directly into the shell structure, forming a unified component. This merging eliminates the separate assembly step of sleeving the shell on the magnetic sensor, thereby resolving the contradiction between assembly simplicity and positioning accuracy. The circuit board becomes an inherent part of the shell, ensuring fixed relative positions.
Solution Approach 2:
The magnetic sensing circuit board is embedded within the shell structure, with the circuit board nested inside the shell cavity. This nesting approach provides precise positioning while maintaining structural integrity, solving the positioning accuracy issue without requiring complex external assembly procedures.
2Device complexity
If the permanent magnet is positioned such that the distance to the magnetic sensor changes during rotor rotation, then the structure is simple, but the magnetic strength experiences jumping changes, causing induction signals to change too fast or too slowly
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism that allows the permanent magnet to move relative to the rotor, compensating for distance changes during rotation. This dynamic positioning ensures the distance between the permanent magnet and magnetic sensor remains constant, maintaining stable magnetic strength while preserving structural simplicity.
Solution Approach 2:
The patent changes the positional parameter of the permanent magnet dynamically during operation. By adjusting the magnet's position to compensate for rotational movement, the system maintains a constant distance parameter, thereby stabilizing the magnetic field strength despite the rotor's rotation.
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
This configuration enhances the sensing accuracy of the potentiometer assemblies by maintaining precise sensor positioning and linear magnetic strength changes, ensuring synchronized induction signal changes with rotor rotation, thus improving the overall performance and reliability of the electromagnetic induction type rocker potentiometer.
Implementation Method 1
The electromagnetic induction type potentiometer uses a permanent magnet as a component of the rotating or sliding system and uses a linear Hall sensor to detect a position of the permanent magnet in real time
Implementation Method 2
uses a linear Hall sensor to detect a position of the permanent magnet
Data Source
AI summary
An electromagnetic induction type rocker potentiometer is provided, including a base, a sliding disc, a rocker handle, two rocking arms, an iron housing and two potentiometer assemblies. The potentiometer assemblies are disposed on the iron housing and respectively include a shell, a rotor, a permanent magnet and a magnetic sensing circuit board. The magnetic sensing circuit board is molded on the shell to accurately position a magnetic sensor, thereby improving sensing accuracy. The permanent magnet is cuboid and a distance between the permanent magnet and the magnetic sensor in an axial direction of the rotor does not change along with rotation of the rotor. As the rotor rotates forward or backward, the magnetic strength of the permanent magnet at the magnetic sensor increases or decreases linearly, so that the change process of induction signal is synchronized with the rotation process of the rotor.