Method for monitoring and diagnosing equipment faults through component characteristic multiplier frequency amplitude trend
A diagnostic equipment and frequency doubling technology, used in electrical testing/monitoring, etc., can solve problems such as large data processing volume, improve accuracy and work efficiency, and reduce the requirements for analysts' professional level.
Inactive Publication Date: 2016-08-17
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology
[0003] Using the frequency waterfall diagram for fault diagnosis has two characteristics: first, it needs to store and call a large amount of data within a certain period of time, and the data processing volume is huge; secondly, the analysis of the frequency waterfall diagram requires experienced analysts, and currently It is impossible to judge the fault by quantitatively monitoring a certain parameter, and the diagnosis result is highly subjective
These two characteristics determine that this method is not suitable for online monitoring and diagnosis of equipment, but only for offline analysis of fault data after a fault occurs
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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0018] Such as figure 1 As shown, the present invention monitors and diagnoses the method for equipment failure by component feature frequency multiplier amplitude trend, comprises the following steps:
[0019] Step 1: First, according to the composition of the equipment components and the structure of the components, establish the "equipment component failure characteristic frequency multiplier database A", and the information contained in the database is shown in Table 1;
[0020] Information contained in Table 1 "Equipment Component Failure Characteristic Multiplier Database A"
[0021]
[0022] Step 2: Continuously collect the vibration data of the equipment through the equipment condition monitoring system, and then perform FFT transformation on the original vibration data to obtain a spectrum diagram (or envelope demodulation spectrum, etc.), accord...
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The invention discloses a method monitoring and diagnosing equipment failure through a component characteristic frequency multiplication amplitude trend. According to the method, component failure characteristic frequency multiplication amplitude is extracted from all original data and stored in corresponding databases, a corresponding characteristic frequency multiplication amplitude trend chart is drawn through the information stored in the databases, and the equipment failure can be monitored and diagnosed by mastering the amplitude change trend of failure characteristic frequency multiplication. In addition, through the method, storing and calling a great amount of the original data are avoided, a single parameter (a certain frequency multiplication value) can be monitored and analyzed quantificationally, and therefore the amplitude change trend of frequency multiplication of a certain characteristic of each component can be learnt visually, and the accuracy rate of equipment failure diagnosis and the work efficiency are improved.
Description
technical field [0001] The invention belongs to the technical field of monitoring and diagnosing equipment failures, and relates to a method for monitoring and diagnosing equipment failures through component characteristic frequency multiplication amplitude trends. Background technique [0002] It is one of the basic ideas to implement equipment fault diagnosis by performing FFT transformation on the equipment vibration data to obtain the spectrogram. Finding and identifying fault feature information from the spectrogram. The current common practice is to diagnose the existence and severity of faults according to the magnitude of the multiplier value of the fault characteristics of each component on the equipment. In order to study the changing law of frequency spectrum from the perspective of trend, frequency waterfall diagram is introduced into the field of fault diagnosis. The frequency waterfall diagram arranges the frequency spectrum diagrams of the same test location ...
Claims
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IPC IPC(8): G05B23/02
Inventor 韩斌邓巍赵勇高平亮张鹤丹
Owner XIAN THERMAL POWER RES INST CO LTD