KR101381226B1 - System for monitering vibration of electric train - Google Patents

Abstract

The present invention relates to a system for measuring vibration of an electric train, more particularly, to a system which monitors the vibration measurement of a decelerator installed in an express electric train and the status of the decelerator followed by the same. The vibration measurement system includes: at least one vibration measurement modules (14a, 14b, 14c, 15) which are installed in a power car; a sub main module (11) for receiving and processing at least one which is generated from the vibration measurement module and consisting of a sub processing module (131), a sub communication module (132) and a sub data module (133); and a main module (12) which consists of a main communication module (121) for communicating with the sub main module, a main data module for processing data transmitted from the sub main module and a main control module (123). The sub main module processes signals generated from power cars of each car which corresponds to a predetermined parameter, and the main module processes signals transmitted from the sub main module.

Description

System for Monitering Vibration of Electric Train

The present invention relates to a vibration measurement system of an electric train, and more particularly, to a vibration measurement system of a vibration train for monitoring the vibration of a speed reducer installed in a high-speed electric train and thereby monitoring the state of the speed reducer.

In general, a high-speed railway is a kind of passenger railway, which means a faster vehicle than a conventional railway vehicle, and means a railway designed to operate at a speed of 200 km / h or more or 250 km / h or more. The railway can be made of iron wheel or it can be made by magnetic levitation method. The high-speed railway that runs on iron wheels uses a method of running the wheels by rotating the wheels with electric motors. The pantograph that receives electric power from the electric cable and converts the voltage of electric power supplied from the electric cable to the stator and rotor A main motor for transmitting a voltage from a main transformer to a motor stator to generate a rotating magnetic field, and an auxiliary block for transmitting electric power of the motor block to wheels through a rotor; A traction motor that generates an output in accordance with the current and frequency delivered from the motor block, a reducer combined with a traction motor using a flange, between the reducer and the axle gear reduction unit to allow relative movement between the body and the bogie A power bogie consisting of a tripod positioned and an axle gardenia deceleration device consisting of an input gear and an axle gear and transmitting power to the axle; And a joint bogie for transmitting a traction force and a braking force while supporting the load of the vehicle body.

Since the high-speed railway is operated by electricity and the operation system becomes a sub-industry type, monitoring of the state of the vehicle or the running state is essential to prevent occurrence of a major safety accident and is advantageous to be performed automatically. Such monitoring is advantageous in real time.

In the case of a reduction gear used for electric brakes of high-speed railways, it is checked periodically to prevent defects that can occur during the operation. However, when the parts are damaged faster than the inspection period, there is a danger that the parts are damaged. If the parts wear slowly, the parts may be unnecessarily replaced.

Various technologies related to the monitoring of the railway vehicle's equipment or operation have been developed, and Patent Publication No. 2001-0111905 discloses a system for monitoring the railway vehicle's bogie by using a sensor. Doing. The prior art, the balance condition monitoring sensor unit attached to monitor the balance of the axle temperature, the crack state of the truck, wheel wear, wheel wear, A balance monitoring system unit having a main control panel for collecting and analyzing signals outputted from the balance state monitoring sensor unit to output a path or to make a database and to record data in a storage device; Disclosed is a railroad monitoring system including a railroad vehicle monitoring system that supports the inspection of the balance by receiving the status and recorded data of the balance through serial communication from the balance monitoring system.

Another prior art related to the monitoring of railroad cars is Patent Publication No. 2006-0077593, "Electric Vibration Acceleration Measurement System for Electric Railway Vehicles." The prior art has a speed sensor which is installed on the wheel of the railway for generating a pulse signal corresponding to the number of revolutions of the wheel while the railway vehicle is running; A frequency / voltage converter converting the frequency of the intermittent pulse detected by the speed sensor into a voltage; An A / D converter converting the analog railroad vehicle speed voltage output from the frequency / voltage converter into a digital signal; A vehicle speed detector configured to receive an output signal of the A / D converter and detect a current traveling speed of a railway vehicle; A counter for counting intermittent pulses detected by the speed sensor; A position information detector which receives the output signal of the counter and calculates a travel distance of a railroad car corresponding to the number of pulses and detects the position thereof; A propulsion signal detector for detecting whether the mascon operated by the engineer is operated on the propulsion side; A braking signal detector for detecting whether the mascon operated by the engineer is operated to the braking side; A PWM value input unit that reads in% of maximum power in response to its position and operation amount through a pulse width modulation method when the mascon is operated by the engineer on the propulsive or braking side; A DC / DC converter for converting the propulsion and braking voltages output from the propulsion and braking signal detectors into DC voltages into DC voltages that can be recognized by a computer; A signal converter converting the propulsion and braking signals output from the PWM value input unit into 100 fractions; A second A / D converter for converting vibration acceleration values in the front, rear, left, and right directions into digital signals in electric motors installed in each vehicle; Receives the output signal of each part in real time and saves the vibration acceleration and the state, driving speed and position information of the front and rear, left and right, up and down direction generated by the motor of each vehicle, and outputs the corresponding information. There is an electric motor vibration acceleration measuring system of a configured electric railway vehicle.

Another prior art related to the monitoring of railroad cars is Patent Publication No. 2010-0021327, "Torque track real-time monitoring system." The prior art is fixed to one side of the axial member which is mounted on a railroad car and moves along with the up and down movement of the left and right wheels in order to detect a rail track inaccuracy and monitor an abnormality. Vertical vibration sensor; A left and right vibration sensor fixedly mounted to one side of the axial member that moves along with the left and right movement of the wheel to detect left and right movement of the wheel; The track detecting means is configured as a horizontal distance detecting means fixedly mounted to the member on the shaft to measure the horizontal distance between the wheelset and both tracks, and the speed of the vehicle is detected by detecting the rotational speed of the member that rotates in association with the wheel or the wheel. A vehicle speed sensor for detecting; It consists of an RFID TAG that is installed on a sleeper or a roadbed and contains track information, an RFID READER that is mounted on a railroad vehicle and wirelessly receives the TAG's built-in information as it passes by, and an RFID processor that processes this information. An RFID system for automatically recognizing a vehicle position on track; A data processing apparatus which calculates an inaccurate amount of the trajectory from these collected data and calculates a position on the trajectory of the measured data point; A wireless communication device for transmitting data to the track management system in real time; Disclosure of the Invention The present invention discloses a track error real-time monitoring system that is mounted on a running railway vehicle and detects a track error state at each vehicle position in a non-contact manner, transmits it wirelessly in real time, and utilizes it for track management.

The prior art corresponds to a technique that can be applied to a railroad vehicle in general, but it is difficult to accurately measure and process a signal generated from a related device, and has a problem of low reliability of a signal measured and transmitted from a sensor. In addition, the detection target required to obtain information about the related device is not clear and at the same time has a disadvantage in that it is small in relation to the operation state of the detection target.

The present invention is to solve the problems of the prior art has the following object.

An object of the present invention is to detect and process a signal generated from an electric truck of an electric train or a high-speed electric train to check the operating status of the electric truck in real time and to diagnose the cause of the failure in advance to provide data for predictive maintenance Vibration measurement system.

According to a suitable embodiment of the invention, the vibration measuring system comprises at least one vibration measuring module installed in the power bogie; A sub main module configured to receive and process at least one signal generated from the vibration measuring module, the sub main module comprising a sub processing module, a sub communication module, and a sub data module; And a main module including a main communication module capable of communicating with the sub main module, a main data module for processing data transmitted from the sub main module, and a main control module, wherein each sub main module corresponds to a predetermined parameter. The signal generated from the power bogie of the vehicle is processed and the main module processes the signal transmitted from the sub main module.

According to another suitable embodiment of the invention, the at least one signal comprises a signal relating to the meshing state of the gear installed in the speed reducer of the power bogie, the temperature of the power bogie and the temperature of the lubricating oil.

According to another suitable embodiment of the invention, the sub main module generates predetermined parameter data from at least one signal and transmits it to the main module.

The vibration measuring system according to the present invention has the advantage that the reliability of the detection can be improved by processing signals related to vibrations generated from the electric truck based on various parameters in real time. It also has the advantage that the efficiency of the system can be improved by allowing the detected signal to be automatically processed and managed by the operator. In addition, the system according to the present invention has the advantage that the safety of the operation can be improved while enabling the management automation of the high-speed railway.

Figure 1a schematically illustrates an embodiment of the operating structure of the system according to the present invention.
Figure 1b shows an embodiment of a method of operating a system according to the present invention.
Figure 2 shows an embodiment in which the system according to the invention is operated installed in a high-speed rail vehicle.
Figure 3 shows an embodiment in which the vibration measuring sensor applied to the system according to the present invention is installed in the electric cart.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so that they will not be described repeatedly unless necessary for an understanding of the invention, and the known components will be briefly described or omitted. However, It should not be understood as being excluded from the embodiment of Fig.

Figure 1a schematically illustrates an embodiment of the operating structure of the system according to the present invention.

1A, the vibration measuring system 10 according to the present invention includes at least one vibration measuring module 14a, 14b, 14c, 15 installed in a power cart; Receives and processes at least one signal generated from the vibration measuring modules 14a, 14b, 14c, and 15, and includes a sub processing module 131, a sub communication module 132, and a sub data module 133. (11); And a main module 12 including a main communication module 121 capable of communicating with the sub main module 11, a main data module 122 for processing data transmitted from the sub main module 11, and a main control module 123. The sub main module 11 processes a signal generated from the power bogie of each vehicle corresponding to a predetermined parameter, and the main module 11 receives a signal transmitted from the sub main module 12. Process.

The system according to the present invention is installed in the relevant device is a sensor 100 for generating a detection signal, processed by the state monitoring system 200 and the state monitoring system 200 for receiving and processing the signal generated from the sensor 100 According to the result, the manager 300 may manage the related device. The associated device may be, for example, an electric bogie or a reducer of a high speed train and the condition monitoring system 200 may consist of a client and a server.

As shown in FIG. 1A (b), the sensor 100 may be the vibration measuring module 14a, 14b, 14c, 15 and may be installed in the reducer of the power bogie. The vibration measuring modules 14a, 14b, 14c, 15 may be installed at different locations and such as vibration of the power truck, temperature and temperature of the lubricating oil may be measured and transmitted to the condition monitoring system 200. The vibration measurement module 14a, 14b, 14c, 15 may comprise a digital measurement sensor or an analog measurement sensor and the values measured at each sensor may be converted into electrical signals and transferred to the condition monitoring system.

The condition monitoring system 200 may include a plurality of sub main modules 11 connected to the vibration measuring modules 14a, 14b, 14c, and 15, and a main module 12 connected to each sub main module 11. . The sub main module 11 may be plural and connected to, for example, the vibration measuring modules 14a, 14b, 14c, and 15 installed in each power truck. The sub main module 11 checks the communication status with respect to the sub processing module 131 and the main module 12 which receive and process sensor data transmitted from the vibration measuring modules 14a, 14b, 14c, and 15 and related data. And a sub data module 133 for generating the parameter data by calculating the sensor data received by the sub communication module 132 and the sub processing module 131.

The sub processing module 131 may be, for example, a field-programmable gate array (FPGA) module. The FPGA module may measure various factors from the vibration measuring modules 14a, 14b, 14c, and 15 to be converted into necessary signals and transferred to the sub main module 11. Data detected by the vibration measuring modules 14a, 14b, 14c, and 15 may be transmitted to the sub main module 11 through the sub processing module 131. In addition, the detection data may be transmitted to the sub data module 133 and converted into parameter data. Parameter data refers to data that has been digitized so that it can be compared with the reference value in advance to determine the state of the motorized bogie. The parameter data is, for example, an overall energy value (Overall) summed by the amplitudes of the selected frequency band (Bandwidth), a partial state where the teeth of the gear are meshed, and the eccentricity of the gear, tooth wear or excessive backlash Such as gear tooth frequency (GMF), bearing frequency (BPFI), bearing outer ring frequency (BPFO), reduction gear shaft frequency (Shaft), or the peak value of shock vibrations occurring in bearings and gears But are not limited thereto. In addition, the temperature of the trolley or the temperature of the lubricant may likewise be included in the data parameters.

The parameter data converted by the sub data module 133 may be transmitted to the sub main module 11 again. In addition, the sub communication module 132 may determine whether communication with the main module 12 is possible, and accordingly, whether to transmit parameter data from the sub main module 11 to the main module 12 may be determined.

The main module 12 processes the parameter data received from the sub main module 11 to diagnose the state of the power balance. The main module 12 includes a main communication module 121 for communicating with the sub main module 11 and a main data module for calculating parameter data received from the sub main module 11 to determine whether the power balance is abnormal. 122) and a main control module 123 for controlling the main module 11, such as input of necessary commands, display of data, or determination of a processing form of data. In addition, the main module 12 may include a storage module 133 for storing related data, such as the result of processing the parameter data.

It is possible to transmit and receive various data between the sub main module 11 and the main module 12 to generate parameter data, for example, train speed, or to detect the state of the power truck.

The communication between the modules may be used for example RS-232 communication, Bluetooth communication or any other communication method known in the art, but preferably high data reliability, fast data transmission, 1: N or N: N communication TCP / IP communication capable of this and remote communication can be applied.

In addition, the system according to the present invention may include a Global Positioning System (GPS) module. The GPS module may be used for location information or time information, for example, in the course of driving. In general, the sensor data measured from the power truck may have a difference depending on the position of the track. On the other hand, the presence or absence of an abnormal track can be detected from the difference of the sensor data of the power truck according to the position. As such, the GPS module may be applied to the system according to the present invention and used in various forms.

The operation of the system according to the invention is described below.

Figure 1b shows an embodiment of a method of operating a system according to the present invention.

Referring to FIG. 1B, in order to apply the system according to the present invention, initialization of the system may first proceed (S11). When the initialization of the system proceeds (S11), such as vibration, temperature or the temperature of the lubricating oil in the vibration measuring module installed in the power cart may be measured and converted into an electrical signal. The converted signal may be collected in the sub main module (S12). In general, the magnitudes of vibrations can be expressed in terms of displacement, velocity, and acceleration, and each value can be converted to each other through derivatives or integrations. The sensor data collected from the vibration measuring module may be acceleration for each frequency band measured by the acceleration sensor, and may be converted into a speed or displacement as necessary. However, the sensor according to the present invention is not limited to the acceleration sensor.

The sub main module S12 calculates the collected sensor data (S131) and converts the collected sensor data into parameter data (S132). Accordingly, for example, the calculation (S131) of the sensor data may be the same as the fast Fourier transform. Parameter data for checking the state of the power truck is generated (S132). For example, RMS (S141) of the speed, acceleration or displacement for each frequency band, peak value (Pe) (S142) A Crest Factor (CoF) (S143), a transient value (S144), a bearing inner ring or an outer ring frequency (BP), which are calculated as a peak value / an effective value to detect the degree of impact, (S145) or other parameter data (ETC) (S146) required for diagnosis may be calculated and thus the overall value (OV) (S147) and waveform (S148) may be generated.

When generation of the relevant parameter data in the sub main module is completed and the waveform is generated for each frequency band, it may be checked whether the connection is performed for transmission to the main module (S15). If the connection is allowed (YES), parameter data may be transmitted from the sub main module to the main module (S16). On the other hand, if the connection is not allowed (NO), the connection can be tried again (S151) and then the connection can be confirmed (S152). Thereafter, the connection attempt and the connection can be confirmed in a predetermined number of times, and if the connection is not allowed continuously (NO), the parameter data can be stored and the data collection can be performed again. In contrast, if the connection is allowed (YES), the parameter data can be transmitted to the main module (S16). When the parameter data is transmitted, whether or not the reception is completed can be confirmed (S17), and when the reception completion is confirmed, the data collection step can be performed again.

In the system according to the present invention, processing the data by separating the sub main module and the main module is for real time monitoring. For example, the sub main module can be installed in each power truck and the main module can be arranged in an appropriate number for the entire railway vehicle. In addition, the main module can monitor each power truck in real time using the parameter data transmitted and processed primarily in the server main module.

Hereinafter, an embodiment in which the sub main module and the main module are installed in the system according to the present invention will be described.

Figure 2 shows an embodiment in which the system according to the invention is operated installed in a high-speed rail vehicle.

Referring to FIG. 2, the electric train may be composed of a plurality of vehicles 21a, 21b, 21n, and the first vehicle 21a and the stern vehicle 21b correspond to the power vehicle, and the plurality of passenger vehicles 21n therebetween. This can be installed. Vibration measurement modules may be installed in the power carts 22a to 22f of each of the vehicles 21a, 21b, and 21n, and corresponding sub main modules 24a to 24f may be installed. The main modules 25a and 25b may be installed in the head vehicle 21a and the stern vehicle 21b corresponding to the power vehicle, and the monitoring devices 26a and 26b may be installed in each. Junction boxes 23a to 23f may be installed to transmit signals from vibration measurement modules installed in each of the power trolleys 22a to 22f, and sensor data may be applied to each of the junction boxes 23a to 23f. It may be transmitted to the sub main modules 24a through 24f. The required power can be transmitted through the power cable and communication can be made by the LAN cable between the sub main modules 24a to 24f. In addition, the entire system may be controlled by the on-board computer systems 27a and 27b.

Various forms of deployment are possible and the system according to the invention is not limited to the presented embodiments.

Hereinafter, an embodiment of the vibration measuring module will be described.

Figure 3 shows an embodiment in which the vibration measuring sensor applied to the system according to the present invention is installed in the power balance.

Referring to FIG. 3, the power cart 22 includes wheel wheels 32a and 32b installed at the front and rear, wheels 35a to 35d installed at both of the wheel wheels 32a and 32a, and gears mesh with each other. It may include the reducers 34a to 34d having a structure, the gear boxes 33a and 33b, and the bogie frame 31. Vibration measurement modules B1 to B4 may be installed in each of the reducers 34a to 34d for the measurement of vibration, and the measurement signal may be transmitted to the junction box 23 via the transmission cables T1 to T4. Each of the reducers 34a to 34d can measure the lateral and axial vibrations, the temperature and the lubricating oil temperature and the detected signal can be transmitted to the sub main module via the junction box 23. On the other hand, the vibration measuring module B5 is installed on the body 311 of the bogie frame 31 so that vibration is measured and transmitted to the junction box 23 through the communication cable T5. The junction box 23 may be installed in the body 311 of the bogie frame 31 and a power cable or a communication cable may be connected to each device through the junction box 23.

Sensor data detected in each of the reducers 34a to 34d or the bogie frame 31 may be transmitted to the sub main module via the junction box 23. The sub main module may calculate the received sensor data and process the same as described above.

The embodiment shown in FIG. 3 is exemplary and the vibration measuring module may be installed in various locations and is not limited to the embodiment shown.

The vibration measuring system according to the present invention has the advantage that the reliability of the detection can be improved by processing signals related to vibrations generated from the electric truck based on various parameters in real time. It also has the advantage that the efficiency of the system can be improved by allowing the detected signal to be automatically processed and managed by the operator. In addition, the system according to the present invention has the advantage that the safety of the operation can be improved while enabling the management automation of the high-speed railway.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: vibration measuring system 11: sub main module
12: main module 14a, 14b, 14c, 15: vibration measurement module
21a, 21b, 21n: vehicles 22a, 22f: power bogie
23: junction box 24a, 24f: sub main module
26a, 26b: monitoring device
31: bogie frame 32a, 32b: wheel wheel
35a, 35d: wheel 33a, 33b: gearbox
34a, 34d: reducer
100: sensor 200: condition monitoring system
300: administrator
121: main communication module 122: main data module
131: sub processing module 132: sub communication module
133: sub data module

Claims (3)

In the vibration measurement system of an electric train having a plurality of vehicles,
At least one vibration measuring module 14a, 14b, 14c, 15 installed in the power bogie;
Receives and processes at least one signal generated from the vibration measuring modules 14a, 14b, 14c, and 15, and includes a sub processing module 131, a sub communication module 132, and a sub data module 133. (11); And
The main module 12 includes a main communication module 121 that can communicate with the sub main module 11, a main data module 122 that processes data transmitted from the sub main module 11, and a main control module 123. Including,
The sub main module 11 processes a signal generated from a power bogie of each vehicle corresponding to a predetermined parameter, and the main module 11 processes a signal transmitted from the sub main module 11. Vibration measurement system for electric trains. The vibration measuring system of claim 1, wherein the at least one signal comprises a signal related to an engagement state of a gear installed in a speed reducer of the power bogie, a temperature of the power bogie and a temperature of lubricating oil. The vibration measuring system according to claim 1, wherein the sub main module (11) generates predetermined parameter data from at least one signal and transmits it to the main module (12).

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