Indexing mechanism of ultrasonic wave motor based high-precision miniaturized fiber optic gyroscope north finder

An ultrasonic motor, ultrasonic motor technology, applied in gyroscope/steering induction equipment, Sagnac effect gyroscope, instrument, etc., can solve the problems of high assembly process requirements, heavy weight, complex structure, etc., and achieve volume reduction and weight, filling miniaturization, simple structure effect

Inactive Publication Date: 2015-07-22
ZHEJIANG UNIV
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Problems solved by technology

Although this mechanical indexing gyro north-finder has high north-seeking accuracy, its structure is complicated, which not only requires high processing and assembly technology, but also makes the north-finder large in size and heavy in weight, which cannot be portable in the field. , The use requirements in the weight and volume sensitive en

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  • Indexing mechanism of ultrasonic wave motor based high-precision miniaturized fiber optic gyroscope north finder
  • Indexing mechanism of ultrasonic wave motor based high-precision miniaturized fiber optic gyroscope north finder
  • Indexing mechanism of ultrasonic wave motor based high-precision miniaturized fiber optic gyroscope north finder

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Embodiment Construction

[0015] One of the key technologies of multi-position method fiber optic gyroscope north-seeking is the design of the north-finder indexing mechanism. Taking the four-position north-seeking method as an example, the indexing mechanism must be able to rotate and stop (lock) precisely, and realize switching between four positions at 90° to each other. To achieve precision indexing, in addition to the indexing and locking mechanisms of precision machinery, precision drive technology can also be used to achieve. Ultrasonic motor, as a typical representative of precision drive technology, uses the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration to obtain its motion and torque, and converts the microscopic deformation of the material into the rotation of the rotor through mechanical resonance amplification and friction coupling. Ultrasonic motors have the characteristics of simple structure, small size and light weight, fast response speed, large torqu...

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Abstract

The invention discloses an indexing mechanism of an ultrasonic wave motor based high-precision miniaturized fiber optic gyroscope north finder. According to the invention, the indexing mechanism of the fiber optic gyroscope north finder is designed by adopting a precise driving technique, and an ultrasonic motor is introduced for the first time to design the brand new indexing mechanism to replace the traditional complex mechanical type indexing mechanism and a locking mechanism, so that the structure of the indexing mechanism can be simplified greatly; the fiber optic gyroscope north finder formed by adopting the indexing mechanism can greatly reduce the size and weight of the north finder under the condition of not reducing the north finding precision, and fill the miniaturization and light weight technical blanks of the current indexing mechanism of the high-precision north finder.

Description

technical field [0001] The invention relates to the field of inertial navigation technology and measuring equipment, in particular to a high-precision and miniaturized optical fiber gyro north-finder indexing mechanism based on an ultrasonic motor. Background technique [0002] The gyro north finder is an inertial measurement system that uses a gyroscope to measure the projection direction of the earth's rotation angular rate on the local horizontal plane (ie, the true north position). Gyroscopic north finders are precision inertial measurement instruments widely used to provide orientation references for mobile weapon systems such as artillery, surface-to-surface missiles, and ground-based radars. [0003] At present, the gyro north finder usually adopts the multi-position north finding method. During the implementation process, the gyro needs to be driven by moving parts to rotate to the specified position. After the indexing is completed, a locking mechanism is needed to...

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Application Information

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IPC IPC(8): G01C19/72
CPCG01C19/72G01C19/722
Inventor 王映宇周一览陈杏藩舒晓武刘承
Owner ZHEJIANG UNIV
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