Magnetic induction detection equipment based on uniform rotating excitation magnetic field and orthogonal detection

• Main Authors: CHEN WEIXU, CHEN XU, HE ZHONGHUA, SU YUYI
• Format: Patent
• Language: Chinese; English
• Published: 27.05.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to magnetic induction detection equipment based on a uniform rotating excitation magnetic field and orthogonal detection, and belongs to the technical field of medical electromagnetism. The equipment comprises a coil probe and a miniaturized magnetic induction phase shift spectrometer, the magnetron coil and the annular solenoid coil are respectively used for detecting an axial component and a tangential component of an eddy current secondary magnetic field signal caused by an excitation magnetic field in a living body, the matching circuit matches the excitation coil to an excitation frequency and 50 ohm impedance, and the matching circuit matches the magnetron coil and the annular solenoid coil to 50 ohm impedance; the device is simple in structure, small in size, light in weight and high in detection sensitivity, can realize uniform rotating excitation magnetic field and orthogonal unshielded detection, and is sensitive to detection of magnetic induction phase shift changes caused by