MAGNETOHYDRODYNAMIC ANGULAR VELOCITY SENSOR WITH LIQUID FERROMAGNETIC ROTOR Russian patent published in 2022 - IPC G01C19/20 

FIELD: measuring equipment.

SUBSTANCE: invention relates to gyroscopic angular velocity converters; it can be used to measure motion parameters. A magnetohydrodynamic angular velocity sensor with a liquid ferromagnetic rotor consists of a sensor case, in which a case is rigidly fixed, made of material with a high coefficient of magnetic permeability, in which working liquid is located. At the same time, the case has a circular cross-section, and polyglycol-based ferromagnetic liquid is used as working liquid, while the design provides a bellows connected to a toroidal cavity of the case to compensate for the pressure difference with the environment, electromagnetic pump windings, excitation windings of magnetic angle sensor, Hall sensors, a temperature sensor, the first, the second and the third power amplifiers, a generator of a reference signal frequency, and a microcontroller. At the same time, two pairs of electromagnetic pump windings connected in parallel are connected to two outputs of the first power amplifier, the other two pairs of electromagnetic pump windings connected in parallel are connected to two outputs of the second power amplifier. Excitation windings of the magnetic angle sensor are connected in parallel to an output of the third power amplifier, inputs of the first and the second power amplifiers are connected to outputs of a pulse width modulation of the microcontroller, an output of the generator of the reference signal frequency is connected to an input of the third power amplifier and an input of an ADC of the microcontroller, outputs of four Hall sensors are connected to corresponding inputs of the ADC of the microcontroller, an output of the temperature sensor is connected to an input of the microcontroller.

EFFECT: increase in the accuracy of angular velocity measurement, extension of the range of angular velocity measurement, extension of the operating temperature range, as well as simplification of the device design.

1 cl, 7 dwg