Hall Element Power Measurement Noise Filtering
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Solution Overview
Problem
Existing methods for detecting defects in rotating machines, such as motors, are prone to noise interference, which affects the accuracy of defect detection and diagnosis.
Innovation Solution
A diagnostic apparatus that includes an electric power measurement unit with a Hall element and filtering units to filter out noise from both the input and output sides, allowing for accurate calculation of electric power supplied to the rotating machine, thereby reducing noise influence and enhancing diagnostic precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electric power measurement is performed using a Hall element in a noisy environment, then measurement speed can be maintained, but measurement precision deteriorates due to noise interference
Solution Approach 1:
A filtering unit is introduced as an intermediary component between the Hall element and the measurement system. This filter removes noise from the electric power measurement signal while preserving the useful measurement data, thereby maintaining both measurement speed and precision in noisy environments
Solution Approach 2:
The noise component is extracted and removed from the electric power measurement signal obtained by the Hall element. By separating the noise from the useful signal, the system maintains high measurement speed while achieving improved measurement precision through noise elimination
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 apparatus effectively filters out noise, enabling accurate detection of defects in rotating machines by providing a clear and precise electric power signal, even in noisy environments, and allowing for high-speed measurement of electric power changes.
Implementation Method 1
the electric power is calculated based on Hall voltage that is generated, when Hall current flows through the Hall element based on the applied voltage, and magnetic flux that is proportional to applied current to the rotating machine is applied to a sensor surface of the Hall element, the Hall voltage being proportional to a product of the magnetic flux and the Hall current
Data Source
AI summary
A diagnostic apparatus that diagnoses a cutter tool or a rotating machine based on electric power supplied to the rotating machine, includes: an electric power measurement unit that measures the electric power; and a filtering unit that filters noises input from an input side and an output side of the electric power measurement unit, the electric power measurement unit including a Hall element, and applied voltage of an electric power supply line, that supplies the electric power to the rotating machine from an inverter or a servo amplifier, is input in the Hall element, wherein the electric power is calculated based on Hall voltage that is generated, when Hall current flows through the Hall element and magnetic flux is applied to a sensor surface of the Hall element, the Hall voltage being proportional to a product of the magnetic flux and the Hall current.