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Optimal design of the absolute positioning sensor for a high-speed maglev train and research on its fault diagnosis.

Zhang D, Long Z, Xue S, Zhang J - Sensors (Basel) (2012)

Bottom Line: On the basis of the analysis for the principle of the absolute positioning sensor, the paper describes the design of the sending and receiving coils and realizes the hardware and the software for the sensor.The diagnosis information not only can be sent to an upper center control computer to evaluate the reliability of the sensors, but also can realize on-line diagnosis for debugging and the quick detection when the maglev train is off-line.The absolute positioning sensor we study has been used in the actual project.

View Article: PubMed Central - PubMed

Affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha, Hunan 410073, China. zhangdapeng12@163.com

ABSTRACT
This paper studies an absolute positioning sensor for a high-speed maglev train and its fault diagnosis method. The absolute positioning sensor is an important sensor for the high-speed maglev train to accomplish its synchronous traction. It is used to calibrate the error of the relative positioning sensor which is used to provide the magnetic phase signal. On the basis of the analysis for the principle of the absolute positioning sensor, the paper describes the design of the sending and receiving coils and realizes the hardware and the software for the sensor. In order to enhance the reliability of the sensor, a support vector machine is used to recognize the fault characters, and the signal flow method is used to locate the faulty parts. The diagnosis information not only can be sent to an upper center control computer to evaluate the reliability of the sensors, but also can realize on-line diagnosis for debugging and the quick detection when the maglev train is off-line. The absolute positioning sensor we study has been used in the actual project.

No MeSH data available.


The schematic of synchronous demodulation.
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f10-sensors-12-10621: The schematic of synchronous demodulation.

Mentions: As the analysis above, the amplitude of the induced voltage of the receiving coils should be used to locate the position of the position mark plate, so the the signal must be demodulated after filtering. The demodulation methods that are usually used are square demodulation, envelope demodulation and synchronous demodulation. Considering the special differential structure of the receiving coils, when the positioning coils accomplish locating, the phase of the induced voltage will reverse. If multiplying the received signal by the synchro clock, the variation of the induced voltage can be detected. In addition, the sending circuit and the receiving circuit are both on the same board, so the synchronous demodulation method based on a 4-quadrant multiplier is selected by this paper. The schematic is shown in Figure 10.


Optimal design of the absolute positioning sensor for a high-speed maglev train and research on its fault diagnosis.

Zhang D, Long Z, Xue S, Zhang J - Sensors (Basel) (2012)

The schematic of synchronous demodulation.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472847&req=5

f10-sensors-12-10621: The schematic of synchronous demodulation.
Mentions: As the analysis above, the amplitude of the induced voltage of the receiving coils should be used to locate the position of the position mark plate, so the the signal must be demodulated after filtering. The demodulation methods that are usually used are square demodulation, envelope demodulation and synchronous demodulation. Considering the special differential structure of the receiving coils, when the positioning coils accomplish locating, the phase of the induced voltage will reverse. If multiplying the received signal by the synchro clock, the variation of the induced voltage can be detected. In addition, the sending circuit and the receiving circuit are both on the same board, so the synchronous demodulation method based on a 4-quadrant multiplier is selected by this paper. The schematic is shown in Figure 10.

Bottom Line: On the basis of the analysis for the principle of the absolute positioning sensor, the paper describes the design of the sending and receiving coils and realizes the hardware and the software for the sensor.The diagnosis information not only can be sent to an upper center control computer to evaluate the reliability of the sensors, but also can realize on-line diagnosis for debugging and the quick detection when the maglev train is off-line.The absolute positioning sensor we study has been used in the actual project.

View Article: PubMed Central - PubMed

Affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha, Hunan 410073, China. zhangdapeng12@163.com

ABSTRACT
This paper studies an absolute positioning sensor for a high-speed maglev train and its fault diagnosis method. The absolute positioning sensor is an important sensor for the high-speed maglev train to accomplish its synchronous traction. It is used to calibrate the error of the relative positioning sensor which is used to provide the magnetic phase signal. On the basis of the analysis for the principle of the absolute positioning sensor, the paper describes the design of the sending and receiving coils and realizes the hardware and the software for the sensor. In order to enhance the reliability of the sensor, a support vector machine is used to recognize the fault characters, and the signal flow method is used to locate the faulty parts. The diagnosis information not only can be sent to an upper center control computer to evaluate the reliability of the sensors, but also can realize on-line diagnosis for debugging and the quick detection when the maglev train is off-line. The absolute positioning sensor we study has been used in the actual project.

No MeSH data available.