US 12,405,248 B2
Eddy current flaw detection system based on NV color center quantum sensing technology and detection method thereof
Shaochun Zhang, Hefei High tech Zone (CN); Bowen Zhao, Hefei High tech Zone (CN); Peng Wang, Hefei High tech Zone (CN); Dacheng Luo, Hefei High tech Zone (CN); Zhen Zhang, Hefei High tech Zone (CN); and Xin Liu, Hefei High tech Zone (CN)
Assigned to Anhui Guosheng Quantum Technology Co., Ltd., Anhui (CN)
Filed by ANHUI GUOSHENG QUANTUM TECHNOLOGY CO., LTD., Hefei High tech Zone (CN)
Filed on Jul. 31, 2023, as Appl. No. 18/228,332.
Claims priority of application No. 202211168879.1 (CN), filed on Sep. 25, 2022.
Prior Publication US 2024/0102963 A1, Mar. 28, 2024
Int. Cl. G01N 27/90 (2021.01); G08B 21/18 (2006.01)
CPC G01N 27/9006 (2013.01) [G08B 21/182 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An eddy current flaw detection system based on a NV (nitrogen-vacancy) color center quantum sensing technology, comprising a laser transceiver processing unit, a quantum sensor, an excitation coil, a power supply unit, a microwave coil, and a microwave unit:
the laser transceiver processing unit is configured to generate trigger light to excite the quantum sensor, collect feedback fluorescence generated by the quantum sensor, and process and analyze the feedback fluorescence;
the microwave unit is configured to generate modulating microwaves, wherein the modulating microwaves act on the quantum sensor through the microwave coil;
the power supply unit is configured to supply an alternating current to the excitation coil so as to generate an alternating magnetic field, wherein the alternating magnetic field enables an eddy current to be generated on an object to be detected;
the quantum sensor is configured to sense a surrounding alternating magnetic field and generate feedback fluorescence under the action of the trigger light and the modulating microwaves;
the quantum sensor comprises a sensing optical fiber, both ends of the sensing optical fiber are respectively a light input end and a light output end, and the light output end is provided with a diamond NV color center,
wherein the quantum sensor further comprises a support sleeve sleeved on the periphery of the sensing optical fiber, and the excitation coil is wound around the support sleeve.