Torque Measurement Sensor with Dual Transducers
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Solution Overview
Problem
Existing methods for determining torque on a rotating body are prone to measurement faults due to relative movements between measurement pickups and transmitters, and only allow for the determination of average torque over complete revolutions, resulting in slow and inaccurate measurements.
Innovation Solution
A method and device using two measuring transducers with rings of alternating signal behavior fields, where the sensors are arranged with a small axial distance and jointly assigned to form a single square-wave signal, allowing for the determination of torque from a single signal influenced by both sensors, enabling more accurate and rapid measurement of torque values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate sensors are used for each measuring transducer, then measurement coverage is complete, but device complexity increases and fault susceptibility increases
Solution Approach 1:
The patent combines two separate measuring sensors into a single sensor that detects signals from both measuring transducers simultaneously. This merging reduces the total number of sensors from two to one, simplifying the device structure and reducing fault susceptibility while maintaining complete measurement coverage through signal combination processing.
Solution Approach 2:
The single measuring sensor is designed to perform multiple functions by detecting signals from both measuring transducers. This multi-functional sensor replaces what would traditionally require two separate sensors, reducing system complexity while maintaining comprehensive measurement capability through its ability to process signals from multiple sources.
2Measurement precision
If evaluation is based on complete revolutions only, then measurement accuracy is improved, but measurement speed decreases
Solution Approach 1:
The system performs preliminary measurements and calculations during the rotation process itself, rather than waiting for complete revolutions. By continuously accumulating data and performing intermediate evaluations, the system can determine torque values before the rotation is complete, significantly improving measurement speed while maintaining accuracy through continuous data refinement.
Solution Approach 2:
The measurement process continues continuously throughout the rotation without requiring停顿 or waiting for complete revolutions. The single sensor continuously detects signals from both transducers, and the evaluation process continuously updates torque determinations, maintaining both high speed and accuracy through uninterrupted measurement and calculation.
3Measurement precision
If axial distance between transducers is increased, then torsion detection capability is improved, but device dimensions increase
Solution Approach 1:
The patent optimizes the axial distance parameter to achieve the necessary torsion detection sensitivity without excessive dimension increase. By carefully selecting and adjusting this critical parameter, the system achieves adequate measurement precision for torsion while keeping the overall device size compact and practical for application.
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 approach reduces measurement faults and allows for the determination of torque values per revolution, improving accuracy and enabling the detection of actual average torque and work performed, even before a complete revolution is completed.
Implementation Method 1
measuring transducer, which comprises rings enclosing the rotating body from fields that alternately have different signal behaviors
Data Source
AI summary
The invention relates to a method for determining the torque exerted on a rotating body which can be rotatably driven about an axis of rotation, using a first measuring transducer and a second measuring transducer which are each arranged on the rotating body at an axial distance from one another using a fastening element and comprise rings which surround the rotating body and consist of fields having an alternately different signal behaviour, wherein a measuring sensor is jointly associated with the first measuring transducer and the second measuring transducer and jointly receives an output signal from both measuring transducers, from which a square-wave signal is formed, from which constant values Ti, which are dependent on the geometry of the rings of the two measuring transducers, and variable values αi, which are dependent on the torque exerted, are determined in a first step from edge spacings of particular rising and/or falling edges of the square-wave signal. The invention also relates to an apparatus for determining the torque exerted on a rotating body which can be rotatably driven about an axis of rotation, having a first measuring transducer and a second measuring transducer which are each arranged on the rotating body at an axial distance from one another using a fastening element and comprise rings which surround the rotating body and consist of fields having an alternately different signal behaviour, wherein a measuring sensor is jointly associated with the first measuring transducer and the second measuring transducer and jointly receives an output signal from both measuring transducers, from which a square-wave signal can be determined.