LT6532B - Electrical signal generator - Google Patents

Abstract

Electrical signal generator of extinction vibrating comprises mechanical impactor that generates a uniform amplitude mechanical shock to a resonator, a special form concentrator having an ultrasound frequency that allows generating an electrically signaling oscillation in the ultrasound frequency range and contacting the entire surface area with a piezoelectric material, thereby protecting it's from the impact effect.

Description

Field of the Invention

The present invention relates to the field of energy harvesting equipment, specifically to the generation of extinguishing oscillation electrical signal and direct control of an ultrasonic motor, thus avoiding conventional power supplies such as mains, battery, battery and the like.

State of the art

There is a known piezoelectric oscillating electric signal generator consisting of a bronze disk and a disk-shaped piezoelectric ceramic mounted on a bronze disk. The edges of the bronze disc are rigidly fixed in the frame. The electrical signal of the quenching oscillations is generated from vibrations of the disk (and also of piezoelectric ceramics) caused by a steel sphere falling from a certain height.

The quiescent electric signal generated by the specified device has a maximum frequency of 4 kHz. In addition, the steel sphere directly impacts piezoelectric ceramics, which are very fragile and can be easily damaged by impact forces. Another disadvantage of such a generator is the shock of unequal amplitude depending on the excitation conditions, which results in a non-uniform generation of the quenching electric signal.

Also known is a collector energy harvester for generating an electrical signal for quenching vibrations, consisting of a three-layer frame with a central cylindrical cavity and a steel sphere within it, and piezoelectric brackets attached to the upper layer of the frame. An electrical signal of quenching oscillations is generated when, due to environmental influences, a sphere within the cylindrical cavity strikes the piezoelectric clamp, thus exciting its own vibration of the piezoelectric clamp.

The specified device is suitable for low frequencies in the range 20-190 Hz. In addition, here the steel sphere will directly impact the piezoelectric clamp, resulting in the risk of fragile breakdown of the piezoelectric material or its complete fragmentation. Another disadvantage of such a device is the shock of unequal amplitude depending on the excitation conditions, which results in a non-uniform generation of the quenching electric signal.

Also known is a piezoelectric oscillator electric wave generator consisting of a cylindrical hollow body, two disk-shaped piezoelectric elements coated at its ends perpendicular to the longitudinal axis of the cylinder and a steel sphere in the guide tube inside the cylindrical housing. An electrical signal of quenching oscillations is generated when the steel sphere shocks piezoelectric elements due to vibrations of the entire cylindrical body, causing excitation of the piezoelectric elements (see U.S. Patent Application No. US20040041498 A1, published March 4, 2004).

However, the specified device produces an unequal amplitude shock depending on the excitation conditions, which results in a non-uniform generation of the quenching electric signal.

The essence of the invention

The object of the present invention is to increase the frequency of the electric signal of quenching oscillations, to protect the piezoelectric material from direct impact forces and to create an impact of uniform amplitude.

The object of the invention is achieved by the fact that the structure of the generator has a mechanical impactor which produces a mechanical impact of equal amplitude to the resonator - a special shape concentrator having an ultrasonic frequency, which allows generating quiescent electric signal in ultrasonic frequency range and the whole surface piezoelectric material against impact.

BRIEF DESCRIPTION OF THE DRAWING Figure 1 is a drawing (section) of a quenching electric signal generator.

Embodiments of the Invention (Detailed Description)

The oscillator of extinguishing vibrations consists of mechanical shock absorber 1, tapered aluminum alloy concentrator 2, plastic body 3, rubber bushing 4, piezoelectric rings 5, counterweight 6, clamping screw 7, support rubber 8, cap screws 9, plastic.

The electrical signal of the quenching oscillations is generated as follows:

The mechanical shock is generated by pressing the movable part of the mechanical impactor 1 in the direction indicated by the arrow (down) in the figure. The impact energy is transmitted to the surface of the tapered concentrator 2 with a smaller cross-sectional area. From here, the impact energy is smoothly distributed and transmitted across the entire surface of the hub 2 with a larger cross-sectional area to the piezoelectric rings 5. The piezoelectric rings 5 are deformed by the impact energy and counterweight 6 to generate an electric signal of damping vibrations. In order to obtain a high frequency of the generated signal, the tapered profile concentrator 2, the piezoelectric rings 5 and the counterweight 6 are connected by means of a clamp (by means of a screw screw 7) to form a single piezoelectric converter system. : the hub 2, the piezoelectric rings 5, the counterweight 6 and the {screw screw 7) through the rubber bushing 4 are laterally secured in a plastic housing 3. The system is secured to the rear via the rubber 8 by screwing the plastic cover 10 into the housing 3 using the screws 9.

Compared to the prototype, a new set of structural elements, by virtue of having a mechanical impactor 1 which produces an impact of equal amplitude to an ultrasonic resonant frequency resonator - concentrator 2 which transmits impact energy to piezoelectric rings 5, can produce uniform parameters to protect the material from direct impact. an ultrasonic frequency oscillating electrical signal for control of the ultrasonic actuator. Such a system has a protected piezoelectric material, thus increasing the lifetime and reliability of the extinguishing oscillator electrical signal generator.

Claims (2)

Definition of the invention 1. A continuous oscillating electrical signal generator having a mechanical shock generating element, a piezoelectric material comprising a mechanical impactor (1) which generates a mechanical shock of the same parameters transmitted by a tapered profile-shaped concentrator (2), while generating uniform parameters for outliers. vibration ultrasonic frequency electric signal. An oscillating oscillator electric signal generator according to claim 1, characterized in that it has an ultrasonic frequency resonator - a concentrator (2) that protects the piezoelectric material from direct impact.