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Method and device for fault diagnosis of urban rail vehicle air conditioning system

A technology for air conditioning systems and urban rail vehicles, which is applied in the field of fault diagnosis of air conditioning systems for urban rail vehicles, can solve the problems of inability to structure the air conditioning system, reduce the efficiency and accuracy of fault diagnosis, and cannot directly observe internal components, so as to achieve rapid processing and guarantee The effect of the riding environment

Active Publication Date: 2018-09-28
ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a method and device for fault diagnosis of the air-conditioning system of urban rail vehicles, which solves the problem that the internal components of the air-conditioning system are in operation due to the failure of the structure of the air-conditioning system when manually performing fault diagnosis of the air-conditioning system of urban rail vehicles in the prior art. The process cannot be directly observed, which greatly reduces the technical problem of fault diagnosis efficiency and accuracy

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  • Method and device for fault diagnosis of urban rail vehicle air conditioning system
  • Method and device for fault diagnosis of urban rail vehicle air conditioning system
  • Method and device for fault diagnosis of urban rail vehicle air conditioning system

Examples

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Embodiment 1

[0065] Such as figure 1 Shown is a flow chart of a method for fault diagnosis of an air-conditioning system of an urban rail vehicle according to the present invention, and the method may include:

[0066] Step S101: Acquiring fault signals collected by the collection module when monitoring the air-conditioning system.

[0067] In the practical application of the embodiment of the present invention, the air-conditioning system of the urban rail vehicle can be monitored in real time through the acquisition module, so as to collect the fault signal of the air-conditioning system in time. Wherein, the acquisition module may specifically be a sensor connected to various components of the air-conditioning system, and the type of the sensor may be determined according to the requirements of the components connected to it, and the fault signal may specifically be a voltage or current signal.

[0068] Step S102: Using wavelet packet transform algorithm to process the fault signal to ...

Embodiment 2

[0088] Such as image 3 As shown, it is a flow chart of another urban rail vehicle air-conditioning system fault diagnosis method of the present invention, and the method may include:

[0089] Step S301: Acquiring fault signals collected by the collection module when monitoring the air-conditioning system.

[0090] Step S302: Perform wavelet packet decomposition on the fault signal by using a preset decomposition scale to obtain each frequency signal in the fault signal.

[0091] In the embodiment of the present invention, since the wavelet packet decomposition of the fault signal is implemented using a hierarchical method, the preset decomposition scale refers to the number of layers of wavelet packet decomposition of the fault signal.

[0092] Step S303: extracting the signal features of each frequency signal at each preset resolution scale as a reconstructed signal corresponding to each frequency signal at the preset resolution scale.

[0093] Such as figure 2 In the ex...

Embodiment 3

[0131] Such as Figure 4 As shown, it is a structural schematic diagram of a fault diagnosis device for an air-conditioning system of an urban rail vehicle according to the present invention, and the device may include:

[0132] The first acquisition module S401: used for acquiring fault signals collected by the acquisition module when monitoring the air conditioning system.

[0133]The first processing module S402 is used to process the fault signal by using the wavelet packet transform algorithm to obtain the reconstructed signal of each frequency signal in the fault signal.

[0134] Wherein, in the embodiment of the present invention, the first processing module S402 may include:

[0135] The first decomposition unit is configured to perform wavelet packet decomposition on the fault signal by using a preset decomposition scale to obtain each frequency signal in the fault signal.

[0136] The first extraction unit is used to extract the signal features of each frequency si...

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Abstract

The invention provides an urban rail vehicle air conditioner system fault diagnosis method and device. After a fault signal acquired by an acquisition module through monitoring of the acquisition module on an air conditioner system is obtained, the fault signal is processed with a wavelet packet transform algorithm, reconstructed signals of different frequency bands of the fault signal are obtained, then, feature information of the fault signal can be obtained according to the reconstructed signals, at the moment, the feature information is calculated by adopting a possibility clustering algorithm, a fault type corresponding to the fault information can be rapidly and accurately determined so that processing can be accurately and rapidly performed according to the fault type, the urban rail vehicle air conditioner system can rapidly recover normal work, and a comfortable riding environment for passengers is guaranteed.

Description

technical field [0001] The invention relates to the technical field of air-conditioning system fault diagnosis, and more specifically relates to a fault diagnosis method and device for an air-conditioning system of an urban rail vehicle. Background technique [0002] Nowadays, in order to improve the comfort of passengers in urban rail vehicles, air-conditioning systems are usually installed on urban rail vehicles to adjust the humidity and temperature of the air in the compartments. After the inside air and outside fresh air are processed, the treated air is transported to the passenger room through the ventilation system, so as to ensure the balance of temperature and humidity of the air in the passenger room. Among them, in order to ensure the reliable operation of the air-conditioning system of urban rail vehicles, in practical applications, the control system needs to monitor the operation of the air-conditioning unit and the ventilation system in real time, so as to de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 杨颖李骏李海新彭冬良彭驹
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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