公开(公告)号：US10190717B1

公开(公告)日：2019-01-29

申请号：US15689175

申请日：2017-08-29

申请人： Southwest Research Institute

发明人： Craig M. Wall ,  Peter M. Lee ,  Nicholas J. Mueschke

IPC分类号： F16L55/052 ,  G01F1/22

摘要： A method of damping pulsations produced by an engine or other driver, so that gas flow can more accurately be measured by a gas flow meter. A damping device is placed between the driver and the flow meter, and has an enclosed volume, an input tube, and an output tube. Particular dimensions of the damping device, namely the volume of the chamber and the diameter and length of the input tube, are calculated to result in a desired damping efficiency.

公开(公告)号：US10830668B2

公开(公告)日：2020-11-10

申请号：US15589231

申请日：2017-05-08

申请人： Southwest Research Institute

发明人： Craig M. Wall ,  Peter M. Lee

IPC分类号： G01M15/12 ,  G01H1/00

摘要： An engine vibration imager and method of testing engine stability. An accelerometer, mounted to an engine block, is configured to detect engine vibration and generate a signal indicative of detected vibration. An amplifier, electrically coupled to the accelerometer, is configured to amplify the signal indicative of detected vibration. A light indicator, electrically coupled to the amplifier, is configured to emit light upon receiving the amplified signal. The engine vibration imager also includes an indicator disk including timing marks on a first surface of the indicator disk. The indicator disk is rotatable by the crankshaft and light emitted from the light indicator is visible at the first surface of the indicator disk and indicates on the indicator disk a point in the combustion cycle in which engine vibration is detected.

公开(公告)号：US09660299B2

公开(公告)日：2017-05-23

申请号：US14102197

申请日：2013-12-10

申请人： Southwest Research Institute

发明人： Jeff Qiang Xu ,  Joe Steiber ,  Craig M. Wall ,  Robert Smith ,  Cheuk Ng

IPC分类号： G01R31/36 ,  H01M10/42 ,  H01M10/48

CPC分类号： H01M10/42 ,  G01R31/3679 ,  H01M10/4285 ,  H01M10/48

摘要： A method and system for strain-based estimation of the state of health of a battery, from an initial state to an aged state, is provided. A strain gauge is applied to the battery. A first strain measurement is performed on the battery, using the strain gauge, at a selected charge capacity of the battery and at the initial state of the battery. A second strain measurement is performed on the battery, using the strain gauge, at the selected charge capacity of the battery and at the aged state of the battery. The capacity degradation of the battery is estimated as the difference between the first and second strain measurements divided by the first strain measurement.