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Diesel low-exhaust-temperature fault prediction system and method

A technology of fault prediction and prediction method, which is applied in the direction of test/monitoring control system, general control system, control/regulation system, etc. It can solve the problems of high degree of component correlation, complex diesel engine structure, and no fault prediction yet, and achieve compatibility. Strong and efficient handling of faults

Active Publication Date: 2016-04-13
ZHENJIANG WATERCRAFT COLLEGE OF PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: at present, marine diesel engines are equipped with a thermal parameter monitoring system, which can monitor each parameter in real time, but because the structure of the diesel engine is complex, and the correlation degree of each component is large, the actual measured data will only be alarmed after exceeding the warning value. There is no system for failure prediction

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Embodiment 1

[0029] A low exhaust temperature fault prediction system for a diesel engine, including a signal acquisition system, a modeling simulation system, and a fault diagnosis system connected in sequence; the signal acquisition system is used to collect signals on the diesel engine, process them, and transmit the signals to a monitoring computer storage and processing; it includes four subsystems of signal acquisition, signal conditioning, data acquisition and data processing; the signal acquisition subsystem includes sensors to extract the original signal of the diesel engine, and the acquisition frequency of the signal is once every 1 second; The conditioning subsystem performs system filtering, range adjustment, signal conversion, and signal amplification processing on the original signal; the data acquisition subsystem performs A / D conversion on the signal, and converts the power signal output by the signal conditioning subsystem into a value for the next step data Processing and...

Embodiment 2

[0031] A method for predicting a low exhaust temperature fault system of a diesel engine, comprising the following steps:

[0032]Step 1, the signal acquisition system directly extracts and processes the original signal of the diesel engine, and transmits the signal to the monitoring computer for storage and processing; it uses PHP scripting language to write software, and reads the relevant parameters of the diesel engine in the SQLServer database every 1 second And record it in the txt file, analyze the relevant parameters in the file, remove the distortion points in the data, and perform smoothing processing; the signal acquisition system includes four subsystems: signal acquisition, signal conditioning, data acquisition and data processing, and the signal acquisition sub-system The system is mainly composed of sensors, which directly extract the original signal of the diesel engine; the signal conditioning subsystem performs system filtering, range adjustment, signal conver...

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Abstract

The invention relates to a diesel low-exhaust-temperature fault prediction system and a method. The diesel low-exhaust-temperature fault prediction system comprises a signal acquisition system, a modeling simulation system, and a fault diagnosis system, the signal acquisition system is used for acquiring and processing signals and transmitting the signals to a monitoring computer for storage and processing, the modeling simulation system builds a diesel combustion chamber model by employing a diesel simulation software and simulates the normal work state of a diesel, and the fault diagnosis system analyzes reasons of the fault phenomenon of low exhaust temperature, realizes the simulation of the above fault by adjusting related parameters in the modeling simulation system, establishes a fault database, compares the practical work state of the diesel with the fault database, and determines whether the diesel is in a fault state. According to the system and the method, the installation of a sensor is not needed, the fault of low exhaust temperature of the diesel can be accurately monitored in real time, the fault of low exhaust temperature of the diesel is predicted, fault diagnosis suggestions are provided, and technical support is provided for high-efficiency processing of the faults for users.

Description

technical field [0001] The invention relates to the technical field of diesel engine fault diagnosis, in particular to a diesel engine low exhaust temperature fault prediction system and method. Background technique [0002] With the rapid development of industrialization in today's society, diesel engines, as the most commonly used power machinery equipment, are widely used in fields such as petroleum mines, stationary power generation, railway traction, construction machinery and special ships. The marine diesel engine is the power heart of the ship, and it is also the system with the most faults in the ship's mechanical system. Its safe and reliable operation is the basic guarantee for the safe navigation of the ship. Its performance degradation or failure will affect the performance of the ship. [0003] The cylinder exhaust temperature of a diesel engine reflects the load and combustion quality of the cylinder, and is an important parameter for analyzing the thermal pow...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0221G05B2219/24048
Inventor 谢小平张冬松余世林任长合张邵麒沈军
Owner ZHENJIANG WATERCRAFT COLLEGE OF PLA
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