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Diesel engine online fault detection method and device

A technology for fault detection and diesel engines, which is applied in the direction of internal combustion engine testing, mechanical equipment, engine components, etc., can solve problems such as difficult to determine the faults of diesel engines

Active Publication Date: 2020-10-16
HENAN DIESEL ENGINE IND
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Problems solved by technology

[0003] In order to solve the problem that a single sensor in the prior art is difficult to determine the fault of a diesel engine, the present invention provides an online fault detection method and device for a diesel engine

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  • Diesel engine online fault detection method and device
  • Diesel engine online fault detection method and device

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specific Embodiment I

[0016] Specific embodiment 1: a kind of diesel engine online fault detection device is characterized in that: comprise data acquisition module, data processing module, fault alarm module, fault analysis module, data communication module to form;

[0017] Wherein, the data processing module processes the data of the data acquisition module, and then sends the processed data to the fault analysis module for fault analysis; if there is a fault signal, the fault analysis module sends the fault signal to the fault through the data communication module The alarm module is used for fault alarm.

[0018] The diesel engine is installed on the test bench through the base, and a piezoelectric acceleration sensor is installed at 1 place of the vibration measuring point of the body, and the sensor is installed horizontally on the body of the diesel engine in a threaded manner to monitor the vibration of the body; An eddy current sensor is installed at 2 of the key phase measuring points of...

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Abstract

In order to solve the problem that in the prior art, a single sensor difficultly determines the position of a fault of a diesel engine, the invention provides a diesel engine online fault detection method and device. Rotating speed fluctuation of the diesel engine conforms to normal distribution, so does the vibration frequency, the vibration frequency serves as an input parameter of a BP neural network to be trained, a sample space is built. According to the characteristics of samples, distribution classifying is carried out, and a characteristic spectrum set during normal work of the dieselengine can be obtained; and when a new sample is input, the BP neural network performs autonomic learning and outputs a characteristic frequency spectrum, and if the characteristic frequency spectrumdeviates from an established characteristic frequency spectrum, it is considered that the diesel engine has the fault. According to the method and device, the whole diesel engine can be monitored in real time, the work state during operation of the diesel engine can be analyzed, real-time assessment is carried out. Before the diesel engine has fault, according to signal changes, early warning is made for the fault of the diesel engine, and the fault analysis is carried out.

Description

technical field [0001] The invention belongs to the technical field of diesel engines, and in particular relates to an online fault detection method and device for diesel engines. Background technique [0002] Diesel engine fault monitoring and diagnosis technology is a technology to understand and master the state of diesel engine during use, to determine whether there is any abnormality in the whole or part of it, to detect faults and their causes early, and to predict the development trend of faults. Diesel engine is a power machine with extremely complex structure, and its condition monitoring and fault diagnosis are its key points. Due to the complexity of diesel engine equipment, the diversity of working conditions and the limitations of a single sensor, only part of the information can be obtained when using a single sensor for condition monitoring and fault diagnosis, which reflects a certain aspect of the diesel engine's operating status, and cannot be accurately lo...

Claims

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Application Information

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IPC IPC(8): F02B77/08G01M15/05
CPCF02B77/08F02B77/085G01M15/05
Inventor 吴亚龙朱曦孙思玥姜洪羽
Owner HENAN DIESEL ENGINE IND
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