Device and method for instantaneous speed measurement and cylinder flameout fault diagnosis of diesel engine

Abstract

The invention relates to the field of diesel engine fault diagnosis, and discloses a diesel engine instantaneous rotational speed measurement and cylinder flameout fault diagnosis device and method. The device mainly comprises a detection unit, a central processing unit, a display unit, an input unit and an auxiliary power supply, wherein the detection unit detects and acquires a instantaneous rotational speed signal and a top dead center signal of a diesel engine flywheel; the central processing unit calculates the instantaneous rotational speed according to the received signals, performs cylinder flameout fault diagnosis based on a PSO-BP diesel engine cylinder flameout fault recognition algorithm, determines the position of the fault cylinder, and sends the position information to the display unit, wherein the algorithm rapidity meets the utilization requirement of a test instrument based on an embedded mobile computing platform; the input unit inputs the flywheel tooth number of the diesel engine; and the auxiliary power supply supplies power to all the modules. According to the device, the rotational speed is accurately measured, and the cylinder flameout fault judgment is correct; and the device is utilized in large and medium diesel engines, tests the instantaneous rotational speed of the diesel engines on line, accurately diagnoses the diesel engine cylinder flameout faults, and can achieve digital measurement and remote monitoring management.

Description

technical field [0001] The invention relates to the field of diesel engine fault diagnosis, in particular to a diesel engine instantaneous speed measurement device and a cylinder flameout fault diagnosis method, which is a diesel engine instantaneous speed measurement and cylinder flameout fault diagnosis device. Background technique [0002] As the most commonly used power mechanical equipment, diesel engines are widely used in petroleum mines, fixed power generation, railway traction, construction machinery and other fields, as well as the power systems of military vehicles, tanks, warships, ships, etc. Once a failure occurs, it will often cause production stoppages and equipment damage Even casualties, bringing huge economic losses and social negative impact. Therefore, it is very necessary to monitor the running state of diesel engine in real time and locate faults quickly. Since the diesel engine is a reciprocating machine, the instantaneous speed of the diesel engine ...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects, the object of the present invention is to provide a device and method for measuring the instantaneous speed of a diesel engine and diagnosing a cylinder flameout fault. The method can effectively solve the problem of large errors in fault diagnosis results due to the complex nonlinear relationship of the diesel engine itself, and has the characteristics of high prediction accuracy, high degree of intelligence, and instrument realization.

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