US 12,228,588 B2
System and method for vibration severity measurement
Aaron Arthur Weiss, Portland, OR (US); and Jonathan Cedarleaf, Portland, OR (US)
Assigned to CORNELL PUMP COMPANY LLC, Clackamas, OR (US)
Filed by Cornell Pump Company, Clackamas, OR (US)
Filed on Feb. 16, 2022, as Appl. No. 17/673,152.
Claims priority of provisional application 63/151,307, filed on Feb. 19, 2021.
Prior Publication US 2022/0268807 A1, Aug. 25, 2022
Int. Cl. G01P 15/097 (2006.01); G01H 1/00 (2006.01); G01H 1/06 (2006.01); G01H 1/16 (2006.01); G01P 15/18 (2013.01); G05B 23/02 (2006.01)
CPC G01P 15/097 (2013.01) [G01H 1/003 (2013.01); G01H 1/06 (2013.01); G01H 1/16 (2013.01); G01P 15/18 (2013.01); G05B 23/0221 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor device for rotating machinery, the sensor device comprising:
an enclosure forming a sealed cavity;
an attachment piece to rigidly secure the enclosure to the rotating machinery; and
an electronics assembly secured within the sealed cavity of the enclosure, the electronics assembly comprising:
a vibration sensor,
a wireless communications interface for exchanging data with a user device, and
a general-purpose processor configured to:
receive a measurement request from the user device,
configure a working range for the vibration sensor based on a first data sample and in response to the measurement request, wherein configuring the working range includes calibrating the vibration sensor with a higher resolution for smaller vibration amplitudes or calibrating the vibration sensor with a lower resolution for larger vibration amplitudes,
receive, from the vibration sensor, additional data samples for multiple axes,
calculate a component velocity root mean square (vRMS) value, from the additional data samples, for each of the multiple axes, wherein the calculating minimizes processor cycles of the general-purpose processor, and wherein the calculating comprises:
identifying a first axis sample from the additional data samples for the multiple axes, wherein the first axis sample includes an acceleration time domain (TD) value,
converting the acceleration TD value to an acceleration power spectrum density (PSD) value,
converting the acceleration PSD value to a velocity PSD value, and
converting the velocity PSD value to one of the component vRMS values,
combine the component vRMS values into a sample vRMS value,
send a final vRMS value, based on the sample vRMS value, to the user device via the wireless communications interface, and
generate an alert signal when the final vRMS value exceeds a threshold; and
a disposable battery that powers the vibration sensor, the wireless communications interface, and the general-purpose processor.