Novel range-adjustable magnetic liquid acceleration sensor

• Main Authors: LI DECAI, QIAN LEPING
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2014
• Subjects: INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; PHYSICS; TESTING

The invention discloses a novel range-adjustable magnetic liquid acceleration sensor, and belongs to the technical field of inertial sensors. Current magnetic liquid acceleration sensors are short in range and large in size, and also have the problem that for long-term use, the accuracy of sensor is reduced due to that restoring forces are reduced because of demagnetization of permanent magnets. The sensor is composed of an air tank, an air duct, a valve, a pressure gauge, an end cap, a shell, an inductive coil, a cylindrical permanent magnet, a rubber seal ring, a bolt/nut connecting assembly, air, magnetic liquid and a signal circuit, wherein the cylindrical permanent magnet and the magnetic liquid form inertial mass. While enabling the permanent magnet to float in the inner cavity of the shell, the magnetic liquid also can seal the air in the cavities at two ends in the inner cavity of the shell. When moving axially, the inertial mass compresses the air in the cavity at one end to generate the restoring fo