Low-frequency electromagnetic portable detection device based on embedded system

• Main Authors: ZHU BIN, ZHANG RUIMENG, SHEN CHANGYU, ZHU ZHOUHONG, YUAN FEIYI, ZHOU JUN, YANG JIAO, LI SHENGRU, WANG ZHAOKUN, LI XIANG
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a low-frequency electromagnetic portable detection device based on an embedded system. The device is composed of a detection device housing, an embedded system circuit, an operational amplifier, a display screen, a Hall element, a magnet yoke, an excitation coil, a chassis detection surface and a handle. The embedded system circuit generates a sinusoidal signal and amplifies the sinusoidal signal, the signal excites an alternating electromagnetic field in space through the excitation coil, so that the conductive test piece generates eddy current, magnetic lines overflow when discontinuous defects appear on the surface of the test piece, a secondary magnetic field excited by the induced eddy current changes, and the Hall element near the detection surface can detect the change of the magnetic field. Signals are amplified by an operational amplifier and collected into an embedded system circuit, and information is sent to a display screen, so that whether defects exist or not can be disp