KR200264944Y1 - Apparatus for developing and using an ultra-sonic generator with oscillation circuit - Google Patents

Abstract

The present invention relates to the fabrication and driving of an ultrasonic transducer, and more particularly, to an ultrasonic transducer simultaneously equipped with an ultrasonic generator piezoelectric body and an oscillator for vibrating the ultrasonic transducer, thereby generating ultrasonic waves with the ultrasonic piezoelectric body and simultaneously driving the vibrator. It makes the ultrasonic transducer vibrate.

Description

Apparatus for developing and using an ultra-sonic generator with oscillation circuit

The present invention relates to a method of effectively transmitting ultrasonic waves in the process of converting and generating electrical continuous waves into ultrasonic waves.

1 is a continuous wave oscillator for generating an electrical signal in a cross-sectional structure of an ultrasonic transducer composed of a generally used disk-shaped ultrasonic piezoelectric body. To the piezoelectric fixed plate 109 and the ultrasonic piezoelectric member used by connecting the circular plate ultrasonic piezoelectric member 107 for converting the electrical signal into ultrasonic waves by the electrical signal generated by the continuous wave oscillator and the metallic medium connecting the ultrasonic wave generated from the ultrasonic piezoelectric member to the medium. It consists of a terminal 105 for applying an electrical signal.

As shown in FIG. 1, the electrical signal generated by the continuous wave oscillator converts the continuous electric wave into ultrasonic waves in the ultrasonic piezoelectric body 107 and generates continuous wave ultrasonic waves in the ultrasonic medium as shown in FIG. 3 through the piezoelectric fixing plate 109 (309). FIG. 5 is a diagram illustrating conversion of continuous ultrasonic waves at the points “305” and “b” 307 of FIG. 3 into electrical signals. There are fewer "me" 507 points than points.

In FIG. 6, when there are mediums "A" 615 and "B" 617 having a large ultrasonic reflection coefficient in the ultrasonic medium, the "A" 615 medium partially passes ultrasonic waves generated from the ultrasonic transducer, Some are reflected. This principle also reflects the signal reflected from the medium "B" (617), so that "A" (607), the ultrasonic signal continuously generated from the ultrasonic transducer 603, and "A" (615), "B" By the ultrasonic wave continuously accumulated in the medium "617" and the reflection is repeated, the ultrasonic signal at the point "I" 807 is larger than the ultrasonic signal at the point "ga" 805 as shown in FIG. This phenomenon is called an ultrasonic cavity phenomenon 715. In this case, the ultrasonic signal at the point "I" 605 is larger than the unintended size, so that a lot of ultrasonic energy is concentrated in the medium at the point "I" 605, resulting in damage to the medium.

This cavitation is a phase of the continuous ultrasound generated from the ultrasonic transducer 603 in the case where a medium having a large difference in the impedance of the ultrasonic medium such as "A" (615), "B" (617) is configured. The three ultrasonic signals are in phase when the phase of the ultrasonic signal reflected in the medium "B" 617 and the signal reflected in "B" 617 and reflected back from "A" 615 are the same. Is added. In addition, as time increases, the reflected component between the "A" 615 and "B" 617 media increases, causing cavitation.

When ultrasonic waves are transmitted through the ultrasonic medium by the ultrasonic transducer 603 as shown in FIG. 6, ultrasonic cavitation 715 is generated as shown in FIG. 7 due to the structure of the ultrasonic medium. The ultrasonic cavitation 715 is a phenomenon in which ultrasonic energy is abnormally concentrated in an ultrasonic medium, resulting in damage to the medium due to high ultrasonic energy in the medium.

1 is a configuration diagram of ultrasonic generation by an ultrasonic transducer and a continuous wave oscillator

2 is a configuration diagram of an ultrasonic transducer and a continuous wave oscillator incorporating an oscillator using an eccentric motor into an ultrasonic transducer.

3 is an exemplary diagram in which ultrasonic waves in an ultrasonic medium are driven by driving an ultrasonic transducer with a continuous wave oscillator.

4 is a process in which the electrical continuous wave is changed to continuous ultrasonic wave in the ultrasonic generator

FIG. 5 is a signal obtained by electrically converting an ultrasonic signal at two points "a" and "b" in using the general ultrasonic transducer of FIG.

6 is an illustration of the medium and the ultrasonic progression of the ultrasonic cavitation occurs

7 is a process of generating ultrasonic waves by causing cavitation in an ultrasonic generator

FIG. 8 is a signal obtained by electrically converting ultrasonic signals at two points “a” and “b” when ultrasonic cavitation occurs in an ultrasonic medium as shown in FIG. 6.

9 is an exemplary diagram in which ultrasonic waves progress in an ultrasonic generator including an ultrasonic transducer having a vibrator, a continuous wave oscillator, and an eccentric motor driving circuit.

10 is a process of generating ultrasonic waves without generating a cavity by vibrating the ultrasonic transducer with an eccentric motor driving circuit

FIG. 11 is an electrically converted signal of ultrasonic signals at two points “a” and “b” in the structure of FIG. 9.

According to the present invention, when driving an ultrasonic transducer that converts electrical energy into mechanical energy as a continuous wave, a part of the ultrasonic waves proceeds by ultrasonic characteristic impedance in a medium to which ultrasonic waves are irradiated, and a portion of the ultrasonic waves is reflected in an arbitrary region due to the reflected characteristic. (Cavity) phenomenon occurs. This is a method of preventing the damage of the medium caused by the ultrasonic energy cavitation as a method of preventing the concentration of ultrasonic energy by changing the position of the ultrasonic transducer by using a vibrator.

1. Configuration

As shown in FIG. 2, an oscillator 223 for vibrating the ultrasonic transducer is additionally attached to the ultrasonic transducer 203 to drive the vibrator and to drive the ultrasonic transducer 203 by the continuous wave signal generator to generate ultrasonic waves. Way.

2. Description of operation

As shown in FIG. 9, the ultrasonic transducer 903 is driven by the continuous wave oscillator 901 to generate an ultrasonic signal, and at the same time, the vibrator built in the eccentric motor driving circuit 921 is used to complete the ultrasonic transducer by the vibrator driving circuit. It is vibrated.

In the case of the eccentric motor 223 used as the vibrator in FIG. Given very slowly. When the eccentric motor 223 is mounted, the ultrasonic transducer 203 vibrates in the rotational direction of the vibrator 223 by the ultrasonic driving circuit. As described above, when the ultrasonic transducer 203 drives the continuous wave oscillator 201 and the vibrator 223 at the same time, as shown in FIG. 9, signals reflected between two objects "A" 915 and "B" 917 are reflected. Is present, the ultrasonic signal generated from the ultrasonic transducer 903 is out of phase with the reflected signal. In this case, the ultrasonic signals cancel each other, so that the ultrasonic signal at the point “I” 807 as shown in FIG. 8 is not greater than the ultrasonic signal at the point “A” 805, as shown in FIG. It is possible to prevent the ultrasonic signal of the signal from being greater than the ultrasonic signal at the point of "1". In FIG. 9, the position of the ultrasonic transducer 903 changes according to the vibration of the vibrator, thereby changing the phase between the reflected wave and the traveling wave generated by the two objects "A" 915 and "B" 917. Cavity does not occur.

By changing the position of the ultrasonic transducer by attaching electric and mechanical vibrators to the ultrasonic transducer, it is possible to prevent the energy concentration due to the ultrasonic cavitation generated by the in-phase of the traveling wave and the reflected waves in the ultrasonic medium and perceived by the human senses. It is a method of operating the ultrasonic waves that cannot be performed simultaneously with the vibrator to feel the ultrasonic waves generated by the ultrasonic transducer as vibrations. This design prevents the damage of the medium caused by the generation of a large amount of ultrasonic energy in a certain part of the medium due to the energy concentration due to the cavitation in the ultrasonic medium.

Claims (1)

A method of simultaneously driving an ultrasonic transducer and a vibrator by attaching an oscillator composed of an eccentric motor to the ultrasonic transducer