CN114584859A - Rolling bearing data transmission method of PHM system of train traction motor - Google Patents

Abstract

The invention discloses a rolling bearing data transmission method of a train traction motor PHM system, which comprises the following steps: firstly, a vehicle-mounted unit collects signals of a rolling bearing to generate an original file, and the original file is analyzed into original data; secondly, carrying out MQTT release process on the original data through an MQTT message gateway agent of the vehicle-mounted unit by using corresponding Topic; thirdly, performing MQTT subscription process on the original data through an MQTT input channel of the PHM server platform by means of Topic; fourthly, performing an attachment information adding and analyzing process on the original data, and enabling the data message to become complete data; fifthly, the complete data is processed by Kafka Producer through Topic; sixthly, carrying out a Kafka consumption process on the complete data in a Topic monitoring mode through Kafka Listener; and seventhly, analyzing the complete data into various data to be subjected to a warehousing process.

Description

A rolling bearing data transmission method of a train traction motor PHM system

technical field

The invention relates to the technical field of PHM fault prediction and health management of a train traction motor, in particular to a rolling bearing data transmission method of a train traction motor PHM system.

Background technique

With the development of rail transit technology, the intelligence of rail transit systems also develops. Among them, PHM fault prediction and health management provides a solution to the health state prediction problem of high-speed railway traction motor rolling bearings for rail transit.

The on-board unit of the train traction motor PHM system collects signals from the rolling bearing through sensors, and the generated signals include temperature, rotational speed, vibration signal, current, voltage, etc. The data generated by these signals needs to be transmitted from the onboard unit to the server platform. During the transmission process, a large number of devices are connected at the same time, and multiple on-board units simultaneously collect data on multiple train traction motors. However, such a large amount of rolling bearing data of the train traction motor is prone to downtime in high concurrency scenarios, and it is difficult to support the preservation and asynchronous processing of real-time data streams in the PHM system in an efficient manner.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a rolling bearing data transmission method of a PHM system of a train traction motor, which is used to meet application requirements in high concurrency scenarios, improve message transmission speed, and support real-time data stream storage and asynchronous processing.

The present invention adopts the following technical scheme to realize:

A rolling bearing data transmission method of a train traction motor PHM system, comprising the following steps:

Step 1. The on-board unit collects the rolling bearing signal to generate an original file, and parses the original file into original data;

Step 2, carrying out the MQTT publishing process with the corresponding Topic through the MQTT message gateway agent of the vehicle-mounted unit;

Step 3, carry out the MQTT subscription process with the Topic through the MQTT input channel of the PHM server platform;

Step 4. The original data is added to the attachment information analysis process, so that the data message becomes complete data;

Step 5, carrying out the Kafka production process with the Topic through the Kafka Producer with the complete data;

Step 6. Perform the Kafka consumption process by monitoring the Topic through the Kafka Listener for the complete data;

Step 7: Parse the complete data into a variety of data for warehousing.

Further preferably, in step 1, the original file includes at least one of the following: vibration signal original file tsFile, temperature original file tmFile, rotational speed original file gssFile, voltage original file volFile, current original file curFile; The original data includes the following At least one: raw data of vibration signal, raw data of temperature, raw data of voltage, raw data of current, raw data of rotational speed.

Further preferably, before the MQTT publishing process is performed in the second step, an algorithm model is used to calculate the raw data to obtain characteristic data and/or spectral data, where the characteristic data and/or spectral data are smaller than the original vibration signal data.

Further preferably, the original data and/or the characteristic data and/or the spectral data are encrypted and compressed, so that the original data and/or the characteristic data and/or the spectral data are more secure and smaller.

Further preferably, in step 4, the associated information includes the train number, and the train number can be edited in the database, so that the PHM platform can correctly retrieve the train number corresponding to the motor when the train traction motor gets off for maintenance or when the new machine gets on the train. Completed as the complete data of the corresponding.

Further preferably, before the warehousing process in step 7, an algorithm model is used to calculate the complete data to obtain remaining service life and/or health degree and/or predicted health degree and/or alarm level and/or fault code. The various data into which the complete data is parsed is compressed so that the complete data is smaller.

The present invention also provides an arbitrary device comprising the above-mentioned rolling bearing data transmission method of the traction motor PHM system of a high-speed railway train.

The present invention also provides a transmission platform including the rolling bearing data transmission method and/or device of the train traction motor PHM system.

The present invention focuses on the high real-time performance of data storage and reading and stream data processing by using Kafka, and makes full use of the MQTT lightweight protocol to focus on the communication between the client and the server, and supports the simultaneous connection of millions of devices in the communication and The characteristics of robustness, combined with serialization tools and algorithm models, reduce the amount of data, improve the data transmission speed and stability of the PHM system, support the storage and asynchronous processing of real-time data streams, and meet application requirements in high concurrency scenarios.

The invention has a reasonable design, so that the rolling bearing data of the PHM system of the train traction motor can be sent, received, analyzed and stored in an efficient and safe manner, which has good practical application value.

Detailed ways

The present invention will be described in further detail below with reference to the examples, but the embodiments of the present invention are not limited thereto.

The present embodiment provides a rolling bearing data transmission method of a PHM system of a train traction motor, including the following steps:

Step 1. The on-board unit collects the rolling bearing signal to generate the original vibration signal file tsFile, the original temperature file tmFile, the original rotational speed file gssFile, the original voltage file volFile, and the original current file curFile.

These raw files are parsed into raw vibration signal data, raw temperature data, raw rotational speed data, raw voltage data, and raw current data; the algorithm models of root mean square value, variance, kurtosis, spectral RMS and spectral mean are used to After the raw data of the vibration signal is calculated, the characteristic data file cvFile and/or the spectral data file fftFile are obtained and parsed into characteristic data and/or spectral data, which are smaller than the original data.

All raw data and/or characteristic data and/or spectral data are encrypted and compressed, making data messages and/or characteristic data and/or spectral data more secure and smaller.

The temperature data is stored in the "temperature" topic, the rotational speed data is stored in the "gss" topic, the voltage data is stored in the "voltage" topic, the current data is stored in the "current" topic, and the feature data is stored in the "feature" topic. Store spectral data in the "spectrum" topic.

Step 2: Execute the MQTT publishing process through the MQTT message gateway agent of the vehicle-mounted unit.

Step 3: Use these Topics to perform MQTT subscription process through the MQTT input channel of the PHM server platform.

Step 4. Add these original data to the process of analyzing the attachment information. The attachment information includes the train number trainId. The value of the trainId and the corresponding relationship with the motor number motorId can be edited in the database, so that the train traction motor can be removed for maintenance or on a new machine. The PHM platform can correctly retrieve the train number corresponding to the motor, and the original data after adding the attachment information analysis process becomes the complete data.

Step 5. Pass the complete data through the Kafka Producer and use the Topic for the Kafka production process.

Step 6: Pass the complete data through the Kafka Listener to monitor the Topic for the Kafka consumption process.

Step 7. After calculating the complete data by using the algorithm model of the remaining service life and/or health degree and/or predicted health degree and/or alarm level and/or fault code, the remaining service life and/or health degree and /or predicted health degree and/or alarm level and/or fault code, wherein, the alarm level represents the severity of the fault, and the fault code represents the type of fault.

The complete data is parsed into a variety of data, compressed to make the complete data smaller, and then the storage process is performed.

The complete data is parsed into a variety of data for the storage process.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims (9)

1. a rolling bearing data transmission method of a train traction motor PHM system, is characterized in that: comprise the following steps: Step 1. The on-board unit collects the rolling bearing signal to generate an original file, and parses the original file into original data; Step 2, carrying out the MQTT publishing process with the corresponding Topic through the MQTT message gateway agent of the vehicle-mounted unit; Step 3, carry out the MQTT subscription process with the Topic through the MQTT input channel of the PHM server platform; Step 4. The original data is added to the attachment information analysis process, so that the data message becomes complete data; Step 5, carrying out the Kafka production process with the Topic through the Kafka Producer with the complete data; Step 6. Perform the Kafka consumption process by monitoring the Topic through the Kafka Listener for the complete data; Step 7: Parse the complete data into a variety of data for warehousing. 2. the rolling bearing data transmission method of a kind of train traction motor PHM system according to claim 1, is characterized in that: in step 1, described original file comprises following at least one: vibration signal original file tsFile, temperature original file tmFile , the speed original file gssFile, the voltage original file volFile, the current original file curFile; The raw data includes at least one of the following: raw vibration signal data, raw temperature data, raw voltage data, raw current data, and raw rotational speed data. 3. the rolling bearing data transmission method of a kind of train traction motor PHM system according to claim 2, it is characterized in that: before described step 2 carries out MQTT release process, use algorithm model to calculate described raw data to obtain characteristic data and /or spectral data, the characteristic data and/or spectral data are smaller than the raw data of the vibration signal. 4. The rolling bearing data transmission method of a train traction motor PHM system according to claim 3, characterized in that: encrypting and compressing the original data and/or the characteristic data and/or the spectrum data, The raw data and/or the characteristic data and/or the spectral data are made safer and smaller. 5. The rolling bearing data transmission method of a train traction motor PHM system according to claim 4, wherein in step 4, the associated information includes a train number, and the train number can be edited in the database, so that the train traction The PHM platform can correctly retrieve the train number corresponding to the motor when the motor gets off the train for maintenance or when the new machine gets on the train, and the data is completed as the complete data. 6. The rolling bearing data transmission method of a train traction motor PHM system according to claim 5, characterized in that: before the warehousing process is performed in the step 7, an algorithm model is used to calculate the complete data to obtain the remaining service life and/or health and/or predicted health and/or alarm level and/or fault code. 7 . The rolling bearing data transmission method of the PHM system of a train traction motor according to claim 6 , characterized in that: compressing the various data parsed from the complete data to make the complete data smaller. 8 . 8 . A rolling bearing data transmission device of a PHM system of a train traction motor, characterized in that: comprising the rolling bearing data transmission method of a PHM system of a traction motor of a high-speed railway train according to any one of claims 1 to 7 . 9. A rolling bearing data transmission platform of a train traction motor PHM system, characterized in that it comprises the rolling bearing data transmission method and/or device of the train traction motor PHM system according to any one of claims 1 to 8.