CN215826482U - Motor state monitoring system of power-dispersed motor train unit - Google Patents
Motor state monitoring system of power-dispersed motor train unit Download PDFInfo
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- CN215826482U CN215826482U CN202122222726.8U CN202122222726U CN215826482U CN 215826482 U CN215826482 U CN 215826482U CN 202122222726 U CN202122222726 U CN 202122222726U CN 215826482 U CN215826482 U CN 215826482U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model discloses a motor state monitoring system of a power-dispersed motor train unit, which comprises: the device comprises a sensor module, a data processing module, a communication isolation module, a vehicle-mounted monitoring platform and a power supply voltage reduction module; the sensor module is connected with the data processing module through a signal wire; the data processing module is connected with the communication isolation module in a serial port mode; the communication isolation module is communicated with the vehicle-mounted monitoring platform in a train Ethernet transmission mode; the power supply voltage reduction module provides working voltage for the monitoring system; the vehicle-mounted monitoring platform can be matched with other modules to monitor multiple motors simultaneously. The motor train unit monitoring system integrates mechanical quantity and electrical quantity signals of the motor, overcomes the defect that a traditional monitoring device analyzes time domain and frequency domain indexes, provides big data support for maintenance of the motor train unit, directly stores data by using a database compared with a storage card, and can facilitate data calling of workers in different departments.
Description
Technical Field
The utility model relates to a motor state monitoring system of a power-dispersed motor train unit, which is suitable for monitoring the real-time state of a motor of the motor train unit.
Background
CRH, CR400 and other series of motor trains independently researched and developed in China are all power-dispersed motor train units, and compared with power-concentrated motor train units, the power-dispersed motor train units have the advantages of large traction power, light axle weight, good adhesion performance with rails, large passenger capacity and the like; because the power equipment is distributed below the passenger car, the number of the electrical equipment is three to four times that of the original electrical equipment, and correspondingly, the defects of multiple equipment failure times, complex part maintenance, high maintenance cost and the like exist, so that certain difficulty is caused for the maintenance of the motor train unit.
The daily maintenance of the motor train unit has not introduced large data analysis, the maintenance system is not perfect, taking a CRH2 motor train unit as an example, and dividing the motor train unit into five grades by taking time as a maintenance period according to the existing CRH2 maintenance system in China; the primary repair mainly replaces and adjusts consumed components, the secondary repair mainly inspects key positions of wheel set treads, axles and the like, and the tertiary repair decomposes and overhauls main parts of the bogie, wherein the main parts comprise overhauling of a motor and the tertiary repair is overhauled once every year; under the existing maintenance system, the first-level maintenance and the second-level maintenance generally judge the state of the motor by a maintainer according to maintenance experience and a simple tool, and obviously, the current daily inspection cannot realize accurate judgment and failure trend prediction of the motor failure.
The motor of the motor train unit with the dispersed power has a large number of motors, the normal work of the motors has great significance on the running safety of the train, and the failure of the motors can not only damage the motors, but also endanger the personal safety, thereby causing huge economic loss and severe social influence; the existing motor monitoring device of the motor train unit collects and stores important information such as current of a motor, 3-time voltage effective values, motor stator temperature and the like every 30 s; the semaphore acquired by the existing device can not be converted into frequency domain signals, and only fault alarm processing can be carried out according to the size of the signals, so that the requirements for time domain and frequency domain analysis can not be met; therefore, the utility model provides a motor state monitoring system of a power-decentralized motor train unit, which is used for monitoring the running state of a motor in real time and giving a fault alarm.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a motor state monitoring system of a power-dispersed motor train unit aiming at the problems that the existing motor monitoring device of the motor train unit is lack of data analysis, cannot meet the requirement of large data state repair, does not carry out on-line monitoring and the like; the method comprises the steps of collecting motor phase current and motor bearing vibration signals at a high speed, and monitoring the temperature of a motor stator, a bearing and the ambient environment; and the vehicle-mounted monitoring platform is combined to provide real-time motor state monitoring.
In order to achieve the purpose, the utility model adopts the following technical scheme: a motor state monitoring system of a power-dispersed motor train unit comprises: the device comprises a sensor module, a data processing module, a communication module, a vehicle-mounted monitoring platform and a power supply voltage reduction module; the sensor module is connected with the data processing module; the data processing module is connected with the communication module in a serial port mode; the communication module is communicated with the vehicle-mounted monitoring platform in an Ethernet transmission mode of the train; the power supply voltage reduction module converts the auxiliary 110V voltage of the train into respective working voltages of the sensor module, the data processing module and the communication module.
Preferably, the sensor module comprises a high sampling rate current sensor, an IEPE piezoelectric acceleration vibration sensor and a DS18B20 temperature sensor; the current sensor and the vibration sensor output analog signal quantity which is connected with an analog-to-digital converter of the data processing module, and the temperature sensor outputs digital signals which are directly connected with the central processing unit.
Preferably, the data processing module comprises an analog-to-digital converter and a central processing unit; the central processing unit adopts an STM32 microprocessor; ADS1256 is selected as the analog-to-digital converter, and the analog-to-digital converter and the central processing unit are connected in an SPI communication mode.
Preferably, the communication module comprises an optical coupling isolation device and a 485-conversion Ethernet sub-module, and the train control system of the motor train is isolated from the train control system by the optical coupling isolation device, so that the reliability of the train control system is improved; data are transmitted between the optical coupling isolation device and the 485-to-Ethernet sub-module in a 485 bus mode; the 485-conversion Ethernet submodule transmits the acquired signals to the vehicle-mounted monitoring platform through the Ethernet.
Preferably, the vehicle-mounted monitoring platform comprises a data receiving unit, a database storage unit, a data processing unit and a fault alarm unit.
Compared with the prior art, the utility model has the advantages that: the monitoring system integrates mechanical quantity and electrical quantity signals of the motor, measures high-frequency current signals and vibration signals, adopts a high-precision 24-bit analog-to-digital converter, and can realize simultaneous acquisition of the current signals and the vibration signals by switching a multi-way switch; the temperature sensor adopts DS18B20, a plurality of temperature sensors can be integrated into a single data line and used for being connected with the central controller, and the temperature of a plurality of measuring points can be monitored; the monitoring system adopts an optical coupling isolation device to prevent the electromagnetic radiation of the motor from interfering the train set control system; the vehicle-mounted monitoring platform can realize one-to-many data acquisition and analysis, namely a data receiving unit of the vehicle-mounted monitoring platform can simultaneously receive data of the work of a plurality of motors, a data analysis unit calculates time domain and frequency domain indexes of signals, and if the time domain and frequency domain indexes exceed a limited threshold value, a fault alarm unit is triggered to alarm; the system realizes the real-time monitoring of the motor state.
Most of the existing acquisition systems directly store data in a memory card of a hardware system, scheduling center workers, maintainers and vehicle-mounted machinists need to copy the data by plugging and unplugging the memory card, and a database storage system of a vehicle-mounted monitoring platform can store operation data in the working process of a motor in an Access database of a server, so that the data transmission process is optimized and more humanized; the system can effectively diagnose the running state of the motor train unit motor, can provide data support for the state repair of the motor train unit, and ensures safe and reliable running of the motor.
Drawings
FIG. 1 is a schematic structural diagram of a motor state monitoring system of a power-dispersed motor train unit.
FIG. 2 is a signal acquisition flow chart of a motor state monitoring system of a power-dispersed motor train unit.
Number designation in fig. 1: the device comprises a sensor module (10), a current sensor (11), a vibration sensor (12), a temperature sensor (13), a data processing module (20), an analog-to-digital converter (21), a central processing unit (22), a communication module (30), a light coupling isolation (31), a 485-to-Ethernet (32), a vehicle-mounted monitoring platform (40), a data receiving unit (41), a database storage unit (42), a data analysis unit (43), a fault alarm unit (44) and a power supply voltage reduction module (50).
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a motor state monitoring system of a power-dispersed motor train unit, which includes: the device comprises a sensor module (10), a data processing module (20), a communication module (30), a vehicle-mounted monitoring platform (40) and a power supply voltage reduction module (50); the sensor module (10) is connected with the data processing module (20) through a signal line; the data processing module (20) is connected with the communication module (30) in a serial port mode; the communication module (30) is communicated with the vehicle-mounted monitoring platform (40) in a train Ethernet transmission mode; the power supply voltage reduction module (50) provides working voltage for the sensor module (10), the data processing module (20) and the communication module (30).
The sensor module (10) comprises a high sampling rate current sensor (11), an IEPE piezo acceleration type vibration sensor (12) and a DS18B20 temperature sensor (13); the current sensor (11) has the characteristic of nondestructive detection based on the Hall effect, the phase current of the motor is measured in an annular installation mode, the IEPE piezoelectric acceleration vibration sensor (12) has the advantages of high sampling rate, strong anti-interference capability and the like, the IEPE piezoelectric acceleration vibration sensor is fixed near a bearing end cover through a bolt to measure a vibration signal at a motor bearing, and the current sensor (11) and the vibration sensor (12) are connected with an analog-to-digital converter (21) of the data acquisition module (20); temperature sensor (13) select for use DS18B20 to single bus's mode and central processing unit (22) lug connection, and a plurality of DS18B20 can exist on a bus simultaneously, so this system only needs a signal line can realize external a plurality of temperature sensor (13), monitors the temperature of bearing, electric motor rotor and surrounding environment respectively, has improved central processing unit (22) IO mouth's utilization ratio.
The data processing module (20) comprises an analog-to-digital converter (21) and a central processor (22); the analog-to-digital converter (21) disperses the acquired analog signals into digital semaphore, the digital semaphore is transmitted to the central processing unit (22) in a SPI communication mode, the analog-to-digital converter (21) adjusts a multi-way switch, the simultaneous acquisition of current and vibration signals can be realized, the highest sampling frequency can reach 30KHz, and the requirements of the system are completely met; the central processing unit (22) receives the original data, then the original data are processed, the signals are packaged into 16-system signals which can be directly identified by the vehicle-mounted monitoring platform (40), and the central processing unit (22) is connected with the optical coupling isolation device (31) in a serial port mode.
The communication module (30) comprises an optical coupling isolation (31) device and a 485-to-Ethernet (32) submodule; the optical coupling isolation device (31) is connected with the 485-to-Ethernet (32) submodule through a 485 bus, and the 485 bus adopts a differential input and output mode, so that the optical coupling isolation device is suitable for long-distance transmission and has strong anti-interference capability; the train control system of the motor train is isolated from the system through an optical coupling isolation device (31), so that the interference of electromagnetic radiation of a motor to the train control system of the motor train is reduced, and the reliability of the system is improved; and transmitting the acquired signals to the vehicle-mounted monitoring platform (40) through the Ethernet by using a 485-to-Ethernet (32) submodule.
The vehicle-mounted monitoring platform (40) comprises a data receiving unit (41), a database storage unit (42), a data processing unit (43) and a fault alarm unit (44); the data receiving unit (41) is set to be in a TCP server mode, the 485-to-Ethernet (32) submodule is set to be in a TCP client mode, and signals which can realize one-to-many receiving motor work of the data receiving unit (41) are realized; the database storage unit (42) stores the data into an Access database of the server; the data processing unit (43) evaluates the time domain and frequency domain indexes of the collected signals, and if the evaluation indexes exceed a threshold value, a fault alarm unit (44) gives a fault alarm.
The working process is as follows: when the motor train unit normally runs, the motor monitoring system enters system initialization, starts to work after initialization is completed, firstly collects vibration signals of a motor, transmits the vibration signals to the vehicle-mounted monitoring platform (40) in real time, then converts a collection channel through a multi-way switch of the analog-to-digital converter (21), collects current signals of the motor, transmits the current signals to the vehicle-mounted monitoring platform (40), and reads temperature signals related to motor running after high-speed signal collection is completed because the current signals and the vibration signals are collected at high speed, the sampling frequency can reach 5000Hz, and a certain time is needed for reading the temperature signals, and the temperature signals are transmitted to the vehicle-mounted monitoring platform (40) after averaging; because the acquired data volume is large, the acquisition of vibration, current and temperature signals is executed every 15 minutes to prevent unreasonable occupation of train network communication resources; the on-board mechanic uses an on-board diagnosis platform (40), and a data receiving unit (41) of the on-board mechanic can display received vibration, current and temperature signals; the database storage unit (42) transmits the received data to an Access database of the server in a text form for data storage and motor data analysis of ground service personnel; the received high-frequency signals can be filtered and denoised through the data analysis unit (43), the signals are converted into frequency domain signals through FFT (fast Fourier transform), indexes such as kurtosis, margin, waveform, skewness and the like of the signals can be obtained through an embedded algorithm of the vehicle-mounted diagnosis platform (40), and when the indexes or the temperatures of bearings and stators exceed respective thresholds, an alarm is given through the fault alarm unit (44).
Claims (3)
1. The utility model provides a power dispersion type EMUs motor state monitoring system which characterized in that includes: the device comprises a sensor module (10), a data processing module (20), a communication module (30), a vehicle-mounted monitoring platform (40) and a power supply voltage reduction module (50); the sensor module (10) is connected with the data processing module (20) through a signal line; the data processing module (20) is connected with the communication module (30) in a serial port mode; the communication module (30) is communicated with the vehicle-mounted monitoring platform (40) in a train Ethernet transmission mode; the power supply voltage reduction module (50) provides working voltage for the sensor module (10), the data processing module (20) and the communication module (30).
2. The motor condition monitoring system for the motor train unit of the power distribution type as claimed in claim 1, wherein the sensor module (10) comprises a current sensor (11), a vibration sensor (12) and a temperature sensor (13); the data processing module (20) comprises an analog-to-digital converter (21) and a central processor (22); the communication module (30) comprises an optical coupling isolation (31) device and a 485-to-Ethernet (32) submodule.
3. The motor state monitoring system of the power distribution type motor train unit according to claim 1, wherein the vehicle-mounted monitoring platform (40) comprises a data receiving unit (41), a database storage unit (42), a data processing unit (43) and a fault alarm unit (44); the data receiving unit (41) is set to a TCP server mode; the database storage unit (42) stores the data into an Access database of the server; the data processing unit (43) performs time domain and frequency domain index evaluation on the acquired signals; a failure alarm unit (44) gives a failure alarm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122222726.8U CN215826482U (en) | 2021-09-14 | 2021-09-14 | Motor state monitoring system of power-dispersed motor train unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122222726.8U CN215826482U (en) | 2021-09-14 | 2021-09-14 | Motor state monitoring system of power-dispersed motor train unit |
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| Publication Number | Publication Date |
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| CN215826482U true CN215826482U (en) | 2022-02-15 |
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| CN202122222726.8U Expired - Fee Related CN215826482U (en) | 2021-09-14 | 2021-09-14 | Motor state monitoring system of power-dispersed motor train unit |
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2021
- 2021-09-14 CN CN202122222726.8U patent/CN215826482U/en not_active Expired - Fee Related
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Granted publication date: 20220215 |