Flexible strain sensor and measuring system for monitoring bearing motion

• Main Authors: ZHANG LEI, TAN QIULIN, FAN ZHIHONG
• Format: Patent
• Language: Chinese; English
• Published: 12.02.2021
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention belongs to the technical field of sensors, and discloses a wireless passive flexible strain sensor and a measuring system for monitoring bearing motion. The sensor adopts a flexible substrate, an inductance coil and an interdigital capacitor are arranged on the front side of the flexible substrate, the interdigital capacitor is arranged on the inner side of the inductance coil, one pole of the interdigital capacitor is connected with an inner ring of the inductance coil, and via holes are formed in the positions, corresponding to the outer ring of the inductance coil and the other pole of the interdigital capacitor, of the flexible substrate respectively. The back surface of the flexible substrate is provided with a connecting line used for connecting the outer ring of the inductance coil and the other pole of the interdigital capacitor, and the inductance coil and the interdigital capacitor form an LC resonance circuit. Strain measurement is carried out based on the LC principle, and bearing mo