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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 principle of absolute positioning sensor.
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f3-sensors-12-10621: The principle of absolute positioning sensor.

Mentions: The maglev train has no contact with the tracks, so the absolute positioning sensor is designed to read the position mark plate based on electromagnetic induction [6–8]. The RF coils are classified as positioning coils and code reading coils. As Figure 3 shows, 1–7, 2–8, 3–9, 4–10 are four groups of positioning coils, and 5–6 is a group of code reading coils. The reading coils are narrower than the positioning coils. The four groups of positioning coils are related to the binary codes of the No. 1 to No. 4 narrow slots (see Figure 2). For example, when the position mark plate is at the position shown in Figure 3, the board shields half of the 3–9 coil group. At this time, the voltage induced by the receiving coils just passes the zero point, and at the same time, the digital circuit starts to read 5–6 coil group's state. If the induced voltage on the No. 5 coil is larger than that on the No. 6 coil, the 5–6 coil group's differential voltage is positive. Otherwise, the 5–6 coil group's differential voltage is negative. Thus, the sensor can read out the binary information in the No. 3 narrow slot.


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

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

f3-sensors-12-10621: The principle of absolute positioning sensor.
Mentions: The maglev train has no contact with the tracks, so the absolute positioning sensor is designed to read the position mark plate based on electromagnetic induction [6–8]. The RF coils are classified as positioning coils and code reading coils. As Figure 3 shows, 1–7, 2–8, 3–9, 4–10 are four groups of positioning coils, and 5–6 is a group of code reading coils. The reading coils are narrower than the positioning coils. The four groups of positioning coils are related to the binary codes of the No. 1 to No. 4 narrow slots (see Figure 2). For example, when the position mark plate is at the position shown in Figure 3, the board shields half of the 3–9 coil group. At this time, the voltage induced by the receiving coils just passes the zero point, and at the same time, the digital circuit starts to read 5–6 coil group's state. If the induced voltage on the No. 5 coil is larger than that on the No. 6 coil, the 5–6 coil group's differential voltage is positive. Otherwise, the 5–6 coil group's differential voltage is negative. Thus, the sensor can read out the binary information in the No. 3 narrow slot.

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.