Low-temperature superconducting device for measuring gravity

US9612356B2 · kind B2 · utility

Assignee

• Institute of Electrical Engineering, Chinese Academy of Sciences · CN

Inventors

• Xinning Hu · Beijing, CN
• Qiuliang Wang · Beijing, CN
• Chunyan Cui · Beijing, CN
• Hui Wang · Troy, US
• Yinming Dai · Beijing, CN

Key dates

• Filing date: Aug 19, 2013
• Grant date: Apr 4, 2017
• Expiry date: May 12, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V7/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A low-temperature superconducting device for measuring gravity, includes a low-temperature container, a cryocooler, a rotor chamber, a superconducting rotor, an upper levitation coil, a lower levitation coil, an upper electrode, an intermediate electrode, a lower electrode, a magnetic shielding chamber and a superconducting quantum interference device. By cooling the whole low-temperature superconducting device using a cryocooler, the intermediate electrode disposed in the body of the magnetic shielding chamber will generate an output voltage when the superconducting rotor is displaced due to a change of gravity. Thus, the superconducting quantum interference device can make the superconducting rotor return to the central balance position by adjusting the operating current of the upper levitation coil or the lower levitation coil. A change of gravity can be determined based on the operating current fed back to the upper levitation coil or the lower levitation coil.