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

Published: 13 October 2023| Version 5 | DOI: 10.17632/y2px5tg92h.5


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).


Steps to reproduce

The Python code to convert the raw data to spectrograms is provided in the first link below. The second link provides the pre-print of the article related to this dataset. List of Components # Component Type Make and Part Name 1. Accelerometer PCB 623C01 [1] 2. Microphone PCB 130F20 [2] 3. Load cell OMEGA LCM302 [3] 4. Hall effect sensor OMEGA OMDC-MPU-A [4] 5. Thermocouple (×2) OMEGA KTSS-HH [5] 6. Signal conditionner PCB 482C 4-Channel [6] 7. Data acquisition device NI USB-6212 [7] 8. Motor Lafert LM-71-S4 [8] Selected Sensors: Specification of each sensor that helped in setting up the data acquisition system include: 1. Accelerometer (model 623C01): the sensitivity rating is 100 mV/g, the frequency range is 15,000 Hz, and the measuring range is ± 490 m/s^2 [1]. 2. Microphone (model 130F20): the sensitivity is 45 mV/Pa, and the inherent noise is 29 dB [2]. 3. Load cell (model LCM302): measures up to 5 kN of load, and withstands temperatures up to 107 °C [3]. 4. Hall effect sensor (model OMDC-MPI-A): input voltage 4.5 to 24 Vdc, can be mounted in any orientation [4]. 5. Thermocouple sensor (model KTSS-HH): temperature range 0 to 900℃, 0.125 in probe diameter [5]. References: [1] “PCB Model 623C01.” (accessed May 27, 2022). [2] “PCB Model 130F20.” (accessed May 27, 2022). [3] “LCM302-5KN - Load Cell, 1 mV/V, 1124 lb, 15 VDC, LC302 Series.” (accessed May 27, 2022). [4] “Geartooth Pickup Hall Effect Speed Sensor | Omega Engineering.” (accessed Apr. 14, 2023). [5] “Thermocouple Probes with Retractable Cable| Omega Engineering.” (accessed May 19, 2023). [6] “Series 482.” (accessed May 27, 2022). [7] “USB-6212.” (accessed May 27, 2022). [8] “LarfetLMnLME.pdf.” Accessed: Dec. 19, 2021. [Online]. Available:


University of Ottawa


Mechanical Vibration, Acoustic Device