Liquid level detection system based on electromagnetic wave method

An electromagnetic wave and electromagnetic valve technology is applied in the field of liquid level detection system based on electromagnetic wave method, which can solve the problem of inability to realize real-time detection of liquid nitrogen liquid level, low liquid level alarm, automatic filling and automatic cutting off of liquid nitrogen and reminding, which affects the accuracy of the detection system. and long-term stability, unsuitable for long-term measurement, etc., to avoid surface frosting, reduce filling time, improve accuracy and long-term stability

CN109357730APending Publication Date: 2019-02-19SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-02-19

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Abstract

The invention provides a liquid level detection system based on an electromagnetic wave method. The system comprises: an electromagnetic wave sensor, a controller, a self-pressurization liquid nitrogen storage tank, a main electromagnetic valve, a secondary electromagnetic valve, a pressurizing valve, an exhaust pressure reducing valve and an exhaust valve. According to the liquid level detectionsystem based on the electromagnetic wave method, liquid nitrogen liquid level in the liquid nitrogen container can be detected and displayed in real time, and a function of automatic filling of the liquid nitrogen container is realized.
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Description

technical field

[0001] The present application relates to the technical field of liquid level detection, in particular to a liquid level detection system based on the electromagnetic wave method. Background technique

[0002] In the high-temperature superconducting magnetic levitation technology, the superconducting block is usually soaked in liquid nitrogen to lower its temperature and enter the superconducting state, and the superconducting block in the superconducting state can achieve stable suspension by interacting with an external magnetic field. During the entire operation of the high-temperature superconducting maglev vehicle, it must be ensured that the superconducting block is always immersed in the liquid nitrogen in the liquid nitrogen container (for example, the vehicle-mounted Dewar) to avoid quenching. The quenching of high-temperature superconductors will cause the train to lose its suspension force, rub against the track or even derail.

[0003] However, d...

Examples

Embodiment Construction

[0034] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] figure 1 It is a structural schematic diagram of the liquid level detection system based on the electromagnetic wave method in the embodiment of the present invention.

[0036] like figure 1 As shown, the liquid level detection system based on the electromagnetic wave method in the embodiment of the present invention includes: an electromagnetic wave sensor 4, a controller 13, a self-pressurized liquid nitrogen storage tank 11, a main solenoid valve 8, a secondary solenoid valve 5, and a booster valve 10. Exhaust pressure reducing valve 9 and exhaust valve 6;

[0037] The electromagnetic wave sensor 4 is arranged above the gas outlet 3 of the liquid nitrogen container 2 for holding the liquid nitrogen 1, and is connected with the analog ...