JPH0857420A - Ultrasonic fiber - Google Patents

Abstract

PURPOSE: To provide a ultrasonic fiber for transmitting ultrasonic waves by a metal pipe. CONSTITUTION: A Langevin type ultrasonic vibrator 5 is constituted by clamping two ring ceramic vibrators 3 and 4 between two metals 1 and 2, and a collar 1a set between a horn 6 constituted integrally with the metal 1 of the ultrasonic vibrator and the metal 1 is used as a joint of vibration, and further one end of a long metal pipe 7 is fixed to the horn 6, and terminals 8 and 9 are fitted between ceramic vibrators 3 and 4. The vertical vibration of the horn 6 is transmitted to one end of the metal pipe 7 efficiently by the above constitution, and a ultrasonic waves transmitted through the metal pipe 7 are transmitted to the end of the metal pipe 7 almost without attenuation, the ultrasonic fiber is very effective as a distant transmission device of ultrasonic waves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic fiber in which an ultrasonic wave is propagated by a metal pipe.

[0002]

2. Description of the Related Art Conventionally, in order to propagate an ultrasonic wave, ultrasonic waves generated by an ultrasonic vibrator are radiated into the air or water. Can not be transmitted to.

It is also conceivable that one end of the metal rod is irradiated with the ultrasonic wave generated by the ultrasonic transducer and the ultrasonic vibration is taken out at the other end. It is not possible to concentrate and propagate ultrasonic waves.

As described above, the conventional means for transmitting ultrasonic waves does not have the idea of transmitting concentratedly in a narrow portion.

[0004]

According to the present invention, one long metal pipe has one end fixed to a side surface of a horn of a Langevin type ultrasonic transducer which generates ultrasonic waves by an output from an oscillator. Is.

[0005]

In the present invention, when an output is sent to a Langevin type ultrasonic vibrator to vibrate, the ultrasonic wave generated by the Langevin type ultrasonic vibrator has one end fixed to the side surface of the horn of the ultrasonic vibrator. Since it is efficiently propagated to the tip of one or more metal pipes, for example, one metal pipe can be used for cleaning a thin pipe,
Further, a large number of metal pipes can be used for partial washing, tile joints, tires and the like.

[0006]

FIG. 1 is a side view of an ultrasonic fiber according to an embodiment of the present invention. Langevin in which two ring-shaped ceramic vibrators 3 and 4 are sandwiched and fixed between two metals 1 and 2. Type ultrasonic transducer 5 is configured, and a horn 6 integrally formed with the metal 1 of the ultrasonic transducer 5 and the collar 1a provided between the metal 1 serve as a vibration node, and the horn 6 is long. One end of the metal pipe 7 is fixed, and terminals 8 and 9 are mounted between the ceramic vibrators 3 and 4.

In the ultrasonic fiber of this embodiment having the above-described structure, when an output is supplied from an oscillator (not shown) to the terminals 8 and 9, the Langevin type ultrasonic vibrator 5 is provided.
Vibrate and ultrasonically vibrate the horn 6 of the ultrasonic transducer 5.

Here, by fixing the metal pipe 7 to the horn 6, as shown in FIG.
0 is efficiently propagated to one end of the metal pipe 7, and
The ultrasonic wave propagating through the metal pipe 7 propagates to the tip of the metal pipe 7 with almost no attenuation, so this ultrasonic fiber is very effective as a remote propagation device for ultrasonic waves.

When cleaning a thin pipe with the ultrasonic fiber configured as described above, the metal pipe 7 is inserted into the thin pipe, and the ultrasonic wave generated by the ultrasonic transducer 5 is applied to the metal pipe 7.
When the inside of the thin tube is irradiated from the tip of the, the inside of the thin tube can be cleaned by the vibration of ultrasonic waves.

It is also possible to insert the metal pipe 7 of the ultrasonic fiber into the blood vessel to remove the calcium accumulated in the blood vessel.

FIG. 3 is a block diagram of an ultrasonic fiber according to another embodiment of the present invention, in which a large number of holes 11 are formed in the side surface of the horn 6 of the ultrasonic vibrator 5, and the metal pipes 12 are formed in the large number of holes.
One end of is stuck.

In the ultrasonic fiber of this embodiment having such a structure, when ultrasonic vibration is generated in the ultrasonic vibrator 5, it can be efficiently propagated to the tips of many metal pipes 12.

Therefore, this ultrasonic fiber is used for cleaning fibrous materials such as hair and carpet, and also for cleaning tiles, tires and the like.

As shown in FIG. 4, the ratio r / R of the inner diameter r and the outer diameter R of the metal pipe 7 and the attenuation rate of the metal round bar and the metal pipe at the ratio are measured and the graph of FIG. In order to do so, one end of a metal round bar (ratio r / R = 0) having a length of 500 mm and an outer shape of 1.0 mm is fixed to the horn 6 of the ultrasonic vibrator 5 of FIG. 1 to send ultrasonic vibration. And the attenuation of ultrasonic waves at the other end of the metal round bar is -30 dB (black circle A in FIG. 5), and similarly, the metal round bar having a length of 500 mm and an outer shape of 0.5 mm (ratio r / When ultrasonic vibration was sent to the one end of (R = 0) by the ultrasonic vibrator 5, the attenuation of the ultrasonic wave at the other end of the metal round bar was −26 dB (black circle B in FIG. 5).

Next, in order to measure the attenuation rate of the metal pipe, the outer diameter is 0.3 mm and the inner diameter is 0.1 mm (r / R = 0.
33), when one end of a metal pipe having a length of 500 mm is fixed to the horn 6 of the ultrasonic transducer 5 and an ultrasonic wave is sent, the attenuation of the ultrasonic wave at the other end is -20 dB (black circle C in FIG. 5). )
Similarly, the outer diameter is 0.7 mm and the inner diameter is 0.35 m.
m (r / R = 0.5), when an ultrasonic wave was sent by the ultrasonic transducer 5 to one end of a metal pipe having a length of 500 mm, the attenuation of the ultrasonic wave at the other end was -9 dB (Fig. 5). Black circle D), with an outer diameter of 0.7 mm and an inner diameter of 0.35 mm (r
/R=0.5), the ultrasonic transducer 5 sends ultrasonic waves to one end of a metal pipe having a length of 500 mm, and the attenuation of ultrasonic waves at the tip is -9 dB (black circle E in FIG. 5). Met.

As can be seen from the graph of FIG. 5, a black circle A,
When the solid line F connecting B, C, D, and E is extended, it becomes as shown by the dotted line G, and the round bar with r / R = 0 and the thin-walled hollow metal pipe near r / R = 1 are over the bending vibration. Although it becomes difficult to transmit sound waves, a metal pipe having a ratio r / R = 0.2 to 0.8 in the range H can properly transmit ultrasonic waves.

As explained above, in the ultrasonic fiber of the present invention, one end of one long metal pipe is fixed to the horn of the Langevin type ultrasonic transducer, or a large number of short metal pipes are fixed. With a simple configuration, the ultrasonic waves generated by the ultrasonic transducer can be propagated to the tip of the metal pipe,
It has the advantage that it can be widely used for such things as focusing ultrasonic waves on a narrow area.

[Brief description of drawings]

FIG. 1 is a side view of an ultrasonic fiber according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a state in which an ultrasonic wave is propagated through a metal pipe of the ultrasonic fiber of FIG.

FIG. 3 is a perspective view of an ultrasonic fiber according to another embodiment of the present invention.

FIG. 4 is a diagram for explaining the ratio of the inner diameter to the outer diameter of the metal pipe in the embodiment of the present invention.

FIG. 5: Ultrasonic attenuation rate and r of metal round bar and metal pipe
6 is a graph showing a relationship with / R.

[Explanation of symbols]

 1, 2 Metals 3, 4 Ceramic vibrators 5 Horns 6 Ultrasonic vibrators 7 Metal pipes 8, 9 Electrodes 10 Ultrasonic vibration waves 11 Many holes 12 Metal pipes

Claims (3)

[Claims] 1. An ultrasonic fiber, characterized in that one end of a long metal pipe is fixed to a side surface of a horn of a Langevin type ultrasonic transducer which generates ultrasonic waves by an output from an oscillator. 2. An ultrasonic fiber, wherein one end of a large number of metal pipes is fixed to a side surface of a horn of a Langevin type ultrasonic transducer which generates ultrasonic waves by an output from an oscillator. 3. The ultrasonic fiber according to claim 1, wherein the ratio of the inner diameter to the outer diameter of the metal pipe is 0.2 to 0.8.