Magnetic Torque Sensor Spring Body for Force Transducers
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Solution Overview
Problem
Existing force transducers in process technology are complex to manufacture, require high calibration, and cannot accurately measure axial forces, with limitations in temperature resistance, chemical resistance, and reliability, especially in explosive atmospheres.
Innovation Solution
A spring body for a force transducer with a force-input section, a force-output section, and an elastic deformation body that couples these sections to transmit forces, allowing for precise measurement of torques and compression/tension forces using a coding sampling section that follows deformation movements, enabling reliable force measurement with reduced design and installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If strain gauges are used for torque measurement, then measurement capability is provided, but manufacturing complexity and calibration requirements increase
Solution Approach 1:
The patent replaces the mechanical strain gauge system with a magnetic field-based measurement system. A magnetic carrier with magnet is attached to the shaft, and a sensor detects its position to determine shaft rotation and torque, eliminating the need for adhesive bonding and complex calibration of strain gauges.
Solution Approach 2:
The patent introduces a magnetic carrier as an intermediary between the shaft and the sensor. This magnetic carrier translates mechanical shaft movement into detectable magnetic field changes, simplifying the measurement process while maintaining accuracy.
2Measurement precision
If strain gauges are applied to the shaft, then torque detection is enabled, but temperature and chemical resistance are limited
Solution Approach 1:
The patent replaces temperature-sensitive strain gauges with a magnetic field-based system that uses a magnetic carrier and sensor. This substitution eliminates the adhesive bonding requirements and electronic components that are sensitive to temperature and chemical exposure.
Solution Approach 2:
The magnetic carrier is designed as a simple, robust component that can be easily replaced if needed, unlike strain gauges that require precise installation and are sensitive to environmental degradation.
3Measurement precision
If strain gauges are used, then direct measurement at the shaft is achieved, but data transmission requires energy consumption and is unreliable in explosive atmospheres
Solution Approach 1:
The patent replaces electrical data transmission from rotating strain gauges with a magnetic field-based detection system. The sensor detects the position of the magnetic carrier to determine shaft rotation, eliminating the need for slip rings or wireless transmission in explosive environments.
4Measurement precision
If a torsion rod with magnetic carrier is used, then rotational movement detection is improved, but axial force measurement capability is lost
Solution Approach 1:
The patent designs the spring body to serve multiple functions: it can detect both torque (rotational force) and axial forces (tension/compression) using the same magnetic carrier and sensor system, making the device versatile for different measurement requirements.
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 a reliable, simple, and cost-effective force measurement system that can accurately detect torques and compression/tension forces without the need for complex mechanical components, suitable for various industrial applications, including those in explosive environments.
Implementation Method 1
an elastic deformation body (9) arranged therebetween which couples the force-output section (5) to the force-input section (3) such that a force received by the force-input section (3) is transmitted to the force-output section (5), wherein the elastic deformation body (9) performs a predetermined elastic deformation movement caused by the force to be transmitted
Data Source
AI summary
In a spring body for a force transducer built into a force-transmitting part, a force-input section is provided for receiving a force, a force-output section for transmitting the force, and an elastic deformation body arranged therebetween which couples the force-output section to the force-input section such that the force received by the force-input section is transmitted to the force-output section. The elastic deformation body performs a predetermined elastic deformation movement caused by the force to be transmitted at at least one point. A coding sampling section is provided at the at least one point of the deformation body and which follows deformation movements of the at least one point.