Brake-Induced Vibration Detection for Equipment Abnormalities
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Solution Overview
Problem
Existing brake device abnormality detection systems only detect abnormalities in the brake device itself and fail to identify issues in the equipment on which the brake device is installed.
Innovation Solution
An abnormality detection apparatus and method that utilizes sensor data related to the vibration of the equipment, obtained during the operation of the brake device, to detect abnormalities in the equipment, including a motor and reduction gear, by applying controlled vibrations using an electromagnetic brake and analyzing vibration signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors are arranged in a matrix to improve detection coverage, then detection coverage is improved, but device complexity increases
Solution Approach 1:
A single sensor performs multiple functions: it detects both the presence of a foreign object and the degree of insertion by measuring impedance changes at different frequencies. The sensor array processes multiple impedance values (first impedance at first frequency, second impedance at second frequency) to simultaneously determine both foreign object presence and insertion depth, eliminating the need for separate sensor types for each measurement.
Solution Approach 2:
The system changes the frequency parameter of the detection signal to extract different impedance information from the same sensor. By measuring impedance at multiple frequencies (first frequency and second frequency), the system can distinguish between foreign object detection and insertion depth measurement using a single sensor, reducing device complexity while maintaining detection coverage.
2Measurement precision
If impedance values are corrected based on probe insertion depth to improve measurement precision, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system uses the measured second impedance value (at second frequency) as feedback to determine the probe insertion depth, then uses this depth information to correct the first impedance value (at first frequency). This feedback loop ensures that the foreign object detection is based on corrected impedance values that account for insertion depth variations, improving measurement precision without requiring additional sensors.
Solution Approach 2:
The second impedance value serves as an intermediary that provides information about probe insertion depth. This intermediary measurement enables the system to calculate a correction factor that is applied to the first impedance value, thereby improving the accuracy of foreign object detection without directly measuring insertion depth with a separate sensor.
3Device complexity
If a single sensor is used to reduce device complexity, then device complexity is reduced, but detection precision deteriorates
Solution Approach 1:
A single sensor measures impedance at multiple frequencies (first frequency and second frequency) to extract different types of information. The first frequency measurement is used for foreign object detection while the second frequency measurement is used to determine insertion depth. By changing the frequency parameter, the system achieves both detection functions with a single sensor, maintaining device simplicity while improving detection precision through frequency-based differentiation.
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 precise detection of abnormalities in the equipment without requiring additional vibration application devices, allowing for continuous operation and reducing errors in the detection process.
Implementation Method 1
a sensor that detects a foreign object and a degree of insertion of the probe into the subject's body
Data Source
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AI summary
An abnormality detection apparatus 1 detects an abnormality of equipment (2) according to sensor data that is related to a vibration of the equipment (2) and is obtained while a brake device (23) for braking a motion of a movable part of the equipment (2) is in operation.