Rotary Sensor Vibration Detection Centrifugal Force Separation
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Solution Overview
Problem
Existing sensor systems face challenges in accurately detecting vibrations in rotary parts of processing devices due to the influence of centrifugal force and the need to convert data from a rotary coordinate system to a stationary coordinate system, leading to reduced detection accuracy.
Innovation Solution
A sensor system comprising a board with multiple acceleration sensors and an arithmetic operation unit that calculates translational and centrifugal accelerations, with sensors symmetrically arranged around the rotation axis to minimize centrifugal acceleration effects and improve data conversion accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an acceleration sensor is installed in the rotary part to detect vibration, then vibration detection capability is improved, but detection accuracy deteriorates due to centrifugal force influence
Solution Approach 1:
The patent segments the acceleration detection into two distinct components: vibration acceleration and centrifugal acceleration. By using multiple acceleration sensors arranged symmetrically around the rotation axis, the system can separate the vibration signal from the centrifugal force signal, thereby improving vibration detection accuracy despite the presence of centrifugal force.
Solution Approach 2:
The patent employs asymmetric sensor arrangement where acceleration sensors are positioned at specific angular intervals (e.g., 90 degrees apart) around the rotation axis. This asymmetric positioning enables the system to distinguish between radial and tangential acceleration components, allowing accurate vibration detection while compensating for centrifugal force effects.
2Adaptability or versatility
If data is converted from rotary coordinate system to stationary coordinate system, then data usability is improved, but conversion accuracy deteriorates when rotation direction cannot be accurately detected
Solution Approach 1:
The patent implements a feedback mechanism where the rotation direction and angle information detected by the sensors is continuously fed back to the coordinate conversion process. This feedback enables real-time adjustment of the conversion calculations, ensuring accurate transformation from rotary to stationary coordinate system even during dynamic rotation conditions.
Solution Approach 2:
The patent performs preliminary detection of rotation direction and angle using the acceleration sensors before executing the coordinate conversion. By obtaining accurate rotation state information in advance, the system can perform precise coordinate transformation, improving both data usability and conversion accuracy.
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 high-accuracy detection of vibrations in rotary parts even when sensors are additionally attached, by effectively separating translational and centrifugal accelerations and improving data processing efficiency.
Implementation Method 1
a centrifugal acceleration arot accompanying rotation of the rotary part
Implementation Method 2
a translational acceleration atr and a centrifugal acceleration arot accompanying a vibration
Data Source
AI summary
A sensor system that detects a vibration of a rotating part with a high accuracy even in a case in which a sensor is additionally attached is provided. The invention is directed to a sensor system includes a board that is installed in a rotating part of a cut processing machine; a plurality of acceleration sensors mounted on the board, and a signal processing unit (arithmetic operation). The signal processing unit detects a translational acceleration accompanying moving of the rotating part and a centrifugal acceleration accompanying rotation of the rotating part on the basis of acceleration data detected by each of the acceleration sensors.