Piezo electric vibrator

Mechanics of Electromagnetic Solids pp Cite as. This paper summarizes our recent work on piezoelectric vibratory angular rate sensors gyroscopes. The operating principle and basic behaviors of piezoelectric gyroscopes are explained by a simple example. Structural shapes and vibration modes that can be used to make gyroscopes are summarized and classified. Some common behaviors of piezoelectric gyroscopes are identified. Results from the three-dimensional equations of a rotating piezoelectric body and the corresponding zero-, one- and two- dimensional theories of piezoelectric parallelepipeds, beams, rings, plates, and shells are discussed.
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Design and Properties of Piezoelectric Vibrator with Generating Function by FEM Analysis

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Piezoelectric Vibratory Gyroscopes | SpringerLink

The present invention generally relates to vibrators for use in a clock signal generating circuit and a filter of electronic devices, and more particularly o a piezoelectric vibrator utilizing a piezoelectric substance. Many electronic devices such as microcomputers are equipped with vibrators. The vibrators are used to generate a clock signal defining the operation of the electronic devices and filter signals. Generally, piezoelectric vibrators utilizing piezoelectricity are used as vibrators in many cases. Recent improvements in the processing speed of the electronic devices need to generate a clock signal of a higher frequency. Hence, there has been considerable activity in the development of techniques particularly directed to rising the frequency, such as fine production techniques. A piezoelectric vibrator is an element which includes a piezoelectric body equipped with electrodes.
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Modes of Vibration for Piezoelectric Elements

This invention relates to piezo-electric vibrator devices and it has among its objects improvement of the energy transmission and increase of the low frequency vibration output of the same. Special objects of the present invention are piezo-electric sound apparatus, and particularly hearing-aid bone vibrator devices with improved vibratory power transmission and increased low frequency output. The foregoing and other objects of my invention will be best understood from the following description of exemplifications thereof, reference being had to the accompanying drawings, wherein Fig. In my copending application on piezo-electric devices, Serial No. Vibrator units made by uniting crystal plates or strips of highly piezo-electric crystal substances, such as Rochelle salt crystals, have been chiefly used in this field One type of vibrator unit, known as "twister" consists of two flat X-cut plates of Rochelle salt crystal, or similar piezo-electric substance, mechanically united to each other along a common junction face, with electrode sheets attached to the faces for applying thereto electric fields tending to impart to the two adjacent plates oppositely directed deformations, restraining one plate by the other, and producing a resulting bending motion of the unit larger than the motion that would be imparted to said crystal plates in unrestrained condition.
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Journal of Electroceramics. Bimorph type piezoelectric vibrator with generating function is designed using Finite Element Method FEM and fabricated. Design of piezoelectric vibrator by FEM is focused at its length and the weight of added mass. Also, the vibration and charging properties of the fabricated piezoelectric vibrator are investigated.
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