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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 hardware structure of absolute positioning sensor.
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f4-sensors-12-10621: The hardware structure of absolute positioning sensor.

Mentions: The absolute positioning sensor consists of five channels of circuits which almost have the same hardware structure. Every channel of the circuits includes a RF power amplification circuit and a signal receiving adjustment circuit. The hardware structure is shown in Figure 4. The figure shows only one channel among the five, and the other four are the same. Class C power amplifiers are used to drive the sending coils. According to the center frequency of the resonance, band-pass filters are designed for the receiving side. The induced voltage stimulated by the electromagnetic wave which passes through the narrow slot is picked up by the method of synchronous demodulation. The induced voltage is used to compare with a certain threshold value to get the rising edge or the falling edge which means the positioning coil is ready to locate. At last, based on the five channels' signals, the high-speed FPGA chip decodes the binary information with finite state machines [9,10]. After finishing reading the whole group of position mark plate, it sends the information to the upper computer.


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 hardware structure of absolute positioning sensor.
© Copyright Policy
Related In: Results  -  Collection

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

f4-sensors-12-10621: The hardware structure of absolute positioning sensor.
Mentions: The absolute positioning sensor consists of five channels of circuits which almost have the same hardware structure. Every channel of the circuits includes a RF power amplification circuit and a signal receiving adjustment circuit. The hardware structure is shown in Figure 4. The figure shows only one channel among the five, and the other four are the same. Class C power amplifiers are used to drive the sending coils. According to the center frequency of the resonance, band-pass filters are designed for the receiving side. The induced voltage stimulated by the electromagnetic wave which passes through the narrow slot is picked up by the method of synchronous demodulation. The induced voltage is used to compare with a certain threshold value to get the rising edge or the falling edge which means the positioning coil is ready to locate. At last, based on the five channels' signals, the high-speed FPGA chip decodes the binary information with finite state machines [9,10]. After finishing reading the whole group of position mark plate, it sends the information to the upper computer.

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.