University of Ottawa Rolling-element Dataset – Vibration and Acoustic Faults under Constant Load and Speed conditions (UORED-VAFCLS)

Each set of raw data is obtained at a constant nominal rotational speed and load. Four fault types are collected: inner race, outer race, ball, and cage (five of each type). A total of 20 bearings are tested, where each bearing has three states of data collection: healthy, developing fault, and faulty. As a result, 60 distinct sets of data are included. For all cases, data is collected at a sampling rate of 42,000 Hz for a total 10 seconds per set of data. Raw data is provided in the folders as comma separated values files (.csv), Excel files (.xlsx), and MATLAB files (.mat) Spectrograms are created from the raw data by using the short-time Fourier transform (STFT), while using a Hanning window to convert the accelerometer and microphone values into 2D images. For each raw data file, 400 spectrogram images are created with a signal length of 512. A total of 24,000 spectrogram images are created, 12,000 images for each of the accelerometer and microphone data files. The processed data are provided in the zip files as portable network graphics files (.png).

每一组原始数据均在恒定标称转速与负载条件下采集得到。本次采集了四类故障类型：内圈（inner race）、外圈（outer race）、钢球（ball）与保持架（cage）故障，每类故障各包含5套轴承。本次共测试20套轴承，每套轴承包含三种数据采集状态：健康状态、故障发展状态与故障状态，因此总计包含60组独立数据集。所有数据集的采样率均为42000 Hz，单组数据的采集时长总计为10秒。原始数据以逗号分隔值文件（.csv）、Excel文件（.xlsx）与MATLAB文件（.mat）三种格式存储于对应文件夹中。研究人员基于原始数据，通过短时傅里叶变换（Short-Time Fourier Transform, STFT）生成频谱图，并采用汉宁窗（Hanning window）将加速度计与麦克风采集的信号转换为二维图像。针对每一组原始数据文件，将生成400幅频谱图，单幅频谱图对应长度为512的信号片段。总计将生成24000幅频谱图，其中加速度计与麦克风采集数据分别对应12000幅频谱图。处理后的频谱图数据以可移植网络图形文件（.png）格式打包存储于压缩文件中。

搜集汇总

背景与挑战

背景概述

该数据集提供了20个滚动轴承在恒定负载和速度条件下的振动和声学故障数据，包含健康、发展中故障和故障三种状态的60组数据。数据以原始文件和频谱图图像形式提供，采样率为42,000 Hz，适用于机械振动和声学故障诊断研究。