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Procedure for calculating the size of an ultrasonic signal and its application for detecting valve malfunctions in running engines
Procedure for calculating the size of an ultrasonic signal and its application for detecting valve malfunctions in running engines
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机译:超声信号大小的计算方法及其在发动机运行中检测气门故障的应用
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摘要
A measurement technique that generates a number value identifying the width of a noisy pulse in an analog signal that has particular application for determining whether a defect exists in a cylinder valve of a locomotive diesel engine. The algorithm samples the analog signal, and then the samples are bunched into successive groups where each group includes a predetermined number of samples. A root mean square is taken of the samples in each group to generate a representative amplitude value for that group. Successive amplitude values are multiplied together to generate product values. The product values are averaged over a predetermined number of product values to generate the number value that can be analyzed to determine if a defect in a valve exists. IMAGE
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