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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 comparation of the sychro square clock signal before the phase adjusts and after the phase adjusts. (a) The input signals before the phase adjusts; (b) The input signals after the phase adjusts.
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f11-sensors-12-10621: The comparation of the sychro square clock signal before the phase adjusts and after the phase adjusts. (a) The input signals before the phase adjusts; (b) The input signals after the phase adjusts.

Mentions: The PN junction of the power transistor contains parasitic capacitance and the receiving signal will pass through a band-pass filter. Therefore, there exists some delay between the clock source signal and the signal after filtering. The phase difference will decrease the precision of the amplitude detection. In order to offset the phase difference, a RC delay circuit with Schmitt-trigger inverters is designed. If the RC value is adjusted properly, the synchro clock signal and the signal after filtering will be adjusted to zero phase error state. The result of phase adjustment is shown in Figure 11.


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 comparation of the sychro square clock signal before the phase adjusts and after the phase adjusts. (a) The input signals before the phase adjusts; (b) The input signals after the phase adjusts.
© Copyright Policy
Related In: Results  -  Collection

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

f11-sensors-12-10621: The comparation of the sychro square clock signal before the phase adjusts and after the phase adjusts. (a) The input signals before the phase adjusts; (b) The input signals after the phase adjusts.
Mentions: The PN junction of the power transistor contains parasitic capacitance and the receiving signal will pass through a band-pass filter. Therefore, there exists some delay between the clock source signal and the signal after filtering. The phase difference will decrease the precision of the amplitude detection. In order to offset the phase difference, a RC delay circuit with Schmitt-trigger inverters is designed. If the RC value is adjusted properly, the synchro clock signal and the signal after filtering will be adjusted to zero phase error state. The result of phase adjustment is shown in Figure 11.

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.