JPS6242796Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses an electrostrictive vibrator that is glued and fixed to the outside of the bottom of the cleaning tank (or to the outside of the side if necessary), and sends out ultrasonic waves into the cleaning liquid in the tank to clean items. The present invention relates to an ultrasonic cleaning device that performs the following steps.

When using this type of ultrasonic cleaning equipment, the frequency of the oscillator that drives the vibrator must match the physical resonance frequency of the vibrator, and the frequency of the oscillator that drives the vibrator must match the physical resonance frequency of the vibrator. However, unless the range of fluctuation is extreme, care is taken to track the resonant frequency, and a feedback oscillation method is generally adopted.

FIG. 1 is a block diagram showing the configuration of a typical conventional cleaning device, in which 1 is a cleaning tank, 2 is a cleaning solution, and 3 is a battery made of, for example, barium titanate, bonded to the bottom of the cleaning tank 1. A strain oscillator 4 is a tank circuit 5 that supplies excitation power to the electrostrictive oscillator 3.
, 6 is a feedback transformer, 7 is a feedback circuit that feeds back voltage from the tank circuit 4 to the feedback transformer 6, and arrow A is a feedback loop.

I have achieved some results with the configuration shown here, but
In order to track the resonant frequency of the vibrator more effectively and reliably, it is desirable to detect and feed back a voltage proportional to the ultrasonic vibration itself.

The present invention was developed from this perspective.
A magnetostrictive vibrator with the same resonance frequency as the electrostrictive vibrator is installed, and the ultrasonic vibration generated when the electrostrictive vibrator is driven is detected by the magnetostrictive vibrator, and the vibration is proportional to the vibration induced in the winding of the vibrator. It extracts voltage and returns it back.

Examples of the present invention will be described below. Second
The figure is a block diagram showing the configuration of the embodiment, and the same parts as in FIG. 1 shown above are given the same reference numerals.
Numeral 8 is a magnetostrictive vibrator, for example, a ferrite vibrator formed in a π-shape (the windings wound around the legs are omitted in the figure) and has the same resonance frequency as electrostrictive vibrator 3. Numeral 9 is a magnetostrictive vibrator that has been picked up. A feedback circuit, arrow B, is a feedback loop that feeds back a voltage proportional to the vibration to the amplification circuit 5.

When the electrostrictive vibrator 3 is driven by the output of the tank circuit 4, the ultrasonic vibration is transmitted to the cleaning liquid 2 through the bottom surface of the cleaning tank 1, while the magnetostrictive vibrator 8 is driven by the electrostrictive vibrator 3. Since they are bonded to the same bottom surface, a voltage proportional to the ultrasonic vibrations generated by the electrostrictive vibrator 3 is extracted (i.e., it serves as an alternative to the feedback transformer in FIG. 1), and this voltage is fed back to the amplification circuit 5 through the feedback circuit 9, and after amplification, an excitation loop for driving the electrostrictive vibrator 3 via the tank circuit 4 is formed.

In this way, the electrostrictive vibrator 3 is excited at a frequency close to the resonant frequency, so cleaning can be continued with stable ultrasonic output.

As explained above, the present invention is equipped with a magnetostrictive vibrator that has the same resonance frequency as the electrostrictive vibrator that drives the cleaning liquid, picks up a voltage proportional to the ultrasonic vibration itself generated during cleaning, and returns this voltage. Since an excitation loop is formed that feeds back as a voltage, it operates stably at a frequency close to the resonant frequency of the vibrator, allowing effective cleaning.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a typical configuration of a conventional cleaning device. FIG. 2 is a block diagram showing the configuration of the embodiment. 1...Cleaning tank, 2...Cleaning liquid, 3...Electrostrictive vibrator, 4...Tank circuit, 5...Width amplification circuit, 6...
Feedback transformer, 7... feedback circuit, 8... magnetostrictive vibrator, 9... feedback circuit.

Claims (1)

[Scope of utility model registration request] An electrostrictive vibrator fixed at an appropriate position in the cleaning tank,
The device includes a magnetostrictive vibrator that has a resonance frequency equal to that of the electrostrictive vibrator and is located close to the electrostrictive vibrator, and the output of the electric drive system is directed to the electrostrictive vibrator. is applied to generate ultrasonic vibrations,
A vibration feedback type ultrasonic cleaning device characterized in that an output proportional to the vibration detected by the magnetostrictive vibrator is fed back to an input side of an electric drive system.