Temperature detection system and method for superconducting magnetic levitation device
A detection system and detection method technology, applied in the field of sensors, can solve the problems of destroying the superconductor structure, the difficulty of precise positioning and measurement of key hot spots, suspension force and guide force attenuation, etc.
Active Publication Date: 2020-10-23
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
[0003] There are many problems in the existing technology: for example, operations such as punching holes in the superconductor structure are required for quench detection, which can easily damage the superconductor structure of the ceramic material
For the high-temperature superconducting magnetic levitation device system, the overall hardness of the perforated superconductor decreases, and the levitation force and guiding force provided by it have a large attenuation, which is not conducive to practical application
Due to the limitations of the size and detection accuracy of the current platinum resistance and thermocouple sensors, it is difficult to accurately locate and measure the key hot spots inside the superconducting block.
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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without cre...
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The invention relates to the technical field of sensors, in particular to a temperature detection system and method for a superconducting magnetic levitation device. According to the invention, a connection mode in which a superconducting strip is adhered to the bottom of a superconducting bulk material and optical fiber sensors are arranged at the bottom of the superconducting bulk material and among the layers of the superconducting strip is adopted, and the distributed optical fiber sensors are used as measuring equipment, so that the real-time detection of the tiny temperature change of asuperconductor is realized. The bottom of the superconducting bulk material and the superconducting strip in a superconducting suspension body are used as main temperature detection matrixes, so thatthe temperature of the whole superconducting suspension body can be detected quickly and accurately. The superconducting strip is provided with a plurality of protective substrate layers, so that thesuspension force, the guide force, the damping, the mechanical strength and the thermal stability of the superconducting bulk material are optimized and enhanced. In addition, the number of test points of the sensors can reach 1500 per meter, large-range changing temperature values of more key positions of the superconductor can be collected, and a detected signal serving as a risk quench criterion of the magnetic levitation system has forward hysteresis in time.
Description
technical field [0001] The invention relates to the technical field of sensors, in particular to a temperature detection system and method for a superconducting magnetic levitation device. Background technique [0002] The superconducting magnetic levitation device train utilizes the magnetic flux pinning characteristics of superconducting materials. When the field-cooled superconductor above the magnet moves relative to the magnet, an induced current is generated in the superconductor, which interacts with the external magnetic field to generate levitation force and guiding force. Stable suspension. The temperature rise detection of the on-board superconductor in the high-temperature superconducting magnetic levitation device system, also known as quench detection, is extremely important to provide an early signal for the system to start early warning protection. Limited by the three-dimensional geometric block structure of the superconducting block and the background fiel...
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Login to View More IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 郑珺温鹏刘晓宁陈楠陈凌邓自刚
Owner SOUTHWEST JIAOTONG UNIV