Contactless Magnetic Sensor for Shaft Torque and Force
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Solution Overview
Problem
Existing methods for contactless measurement of distance, motion, torque, and force in industrial applications often require pre-processing or mounting elements on the shaft, which can interfere with the measurement or be impractical due to accessibility issues.
Innovation Solution
A contactless measurement sensor system using magnetic fields, comprising a magnetic field generating unit, a magnetic field detector unit, and an evaluating unit, which allows for non-invasive measurement of distance, motion, torque, and force by generating and detecting magnetic fields influenced by the object, and compensating for varying distances and external effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mounting elements or pre-processing is applied to the shaft for measurement, then measurement capability is improved, but the shaft movement is influenced and accessibility becomes difficult
Solution Approach 1:
A magnetic field is introduced as an intermediary between the sensor and the shaft. The magnetic field interacts with the shaft without requiring physical contact or modification, allowing measurement while preserving the shaft's natural movement characteristics
Solution Approach 2:
The patent replaces mechanical contact-based measurement systems with a magnetic field-based system. Instead of mounting physical sensors on the shaft, a magnetic field is used to detect shaft position and movement, eliminating mechanical interference
2Measurement precision
If mounting elements or pre-processing is applied to the shaft for measurement, then measurement capability is improved, but device complexity and accessibility requirements increase
Solution Approach 1:
The patent replaces complex mechanical pre-processing and mounting operations with a simplified magnetic field-based measurement system that requires no physical modification to the shaft
Solution Approach 2:
The magnetic field serves as a non-invasive intermediary that enables measurement without requiring shaft disassembly, magnetization, or other complex pre-processing steps
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
Enables accurate and non-invasive measurement of distance, motion, torque, and force without the need for pre-processing or mounting, reducing interference and improving accessibility, while being adaptable to different measurement ranges and materials.
Implementation Method 1
a first magnetic field generating unit (10) being adapted for generating a magnetic field towards the object to be sensed
Implementation Method 2
a first magnetic field detector unit (20) being adapted for detecting a first magnetic field which field being generated by the first field generator unit
Data Source
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AI summary
Contactless measurement sensor for measuring at least one of a distance to an object to be sensed, a motion with respect to an object to be sensed, a speed with respect to an object to be sensed, a torque applied to an object to be sensed and a force applied to an object to be sensed the contactless measurement sensor comprises a first magnetic field generating unit being adapted for generating a magnetic field towards the object to be sensed, a first magnetic field detector unit being adapted for detecting a first magnetic field which field being generated by the first field generator unit and being influenced by a respective distance, motion, speed, applied torque and applied force to be measured, wherein the first magnetic field detector unit is further adapted for outputting a first signal being representative for the detected magnetic field, and an evaluating unit being adapted for evaluating a signal strength of the first signal and determining the respective distance, motion, speed, applied torque and applied force based on the first signal.