Hall Sensor Retaining System for Articulation Angle Measurement
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Solution Overview
Problem
Existing retaining systems for rotation angle sensors on work machines are imprecise, complex, and costly, with mechanical wear issues and sensitivity to impacts, making them difficult to position and maintain, especially in harsh environments like large manipulators with thick matter pumps.
Innovation Solution
A retaining system with a guide mechanism between two retaining elements ensures precise axial orientation and spacing of the rotation angle sensor and position encoder element, using a contactless Hall sensor and magnet configuration for robust, cost-effective, and durable angle measurement, allowing for flexible installation and tolerance in positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical rotation angle measuring systems are used, then articulation angle detection is possible, but precision and cost-effectiveness are insufficient
Solution Approach 1:
The patent replaces mechanical rotation angle measuring systems (rotation angle gauges) with a magnetic field-based detection system consisting of a Hall sensor and magnet. This substitution eliminates mechanical contact, reducing wear and maintenance while providing precise articulation angle detection at lower cost, directly resolving the contradiction between measurement precision and ease of manufacture.
2Reliability
If rotary potentiometers are used for angle detection, then absolute value is available immediately, but mechanical wear occurs and measurement results are distorted over time
Solution Approach 1:
The patent replaces rotary potentiometers with a contactless magnetic field-based system using a Hall sensor and magnet. This eliminates mechanical wear between components, ensuring long-term reliability and consistent measurement results without distortion over time, while still providing immediate absolute position information.
3Ease of operation
If angle plates are used for retaining the rotation angle sensor, then sensor assembly is possible, but positioning is difficult and the retainer is sensitive to impacts
Solution Approach 1:
The patent introduces a positioning element with a positioning projection that fits into a positioning groove as an intermediary mechanism between the angle plate and sensor assembly. This feature automatically ensures precise axial orientation and spacing without requiring difficult manual positioning, while the integrated design protects against impacts and simplifies assembly.
4Adaptability or versatility
If different angle plates are provided for different installation positions, then various installation situations are covered, but production outlay and storage costs increase
Solution Approach 1:
The patent designs the angle plate with a universal positioning system featuring a positioning groove and positioning projection that can accommodate the rotation angle sensor assembly in multiple orientations and positions. This single universal design replaces the need for multiple different angle plates, reducing production outlay and storage costs while maintaining adaptability to various installation situations.
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 provides precise, long-lasting, and cost-effective rotation angle measurement with reduced mechanical wear, enabling reliable operation of work machines by accurately detecting articulation angles between machine parts, even in challenging conditions.
Implementation Method 1
the rotation angle sensor is designed as a Hall sensor, and the at least one corresponding position encoder element is designed as a magnet
Data Source
AI summary
A retaining system for a rotation angle sensor assembly is disclosed. The retaining system includes a first retaining element for coupling to a first of two machine parts and comprising a rotation angle sensor of the rotation angle sensor assembly. The retaining system also includes a second retaining element for coupling to a second of the two machine parts and comprising at least one position encoder element of the rotation angle sensor assembly corresponding to the rotation angle sensor. The rotation angle sensor is configured to detect a rotation of the position encoder element relative to the rotation angle sensor. The first retaining element is configured to guide the rotation angle sensor via a guide positioned between the first retaining element and the second retaining element so as to be rotatable relative to the position encoder element on the second retaining element.