Application Cases

Experiment Name: Application of ATA-122D Power Amplifier in Precise Manipulation of Microparticles and Bubbles Using Frequency-Tunable Localized Hollow Ultrasonic Fields

Experiment Content:
The experiment utilizes an acoustic lens to generate a frequency-tunable localized hollow ultrasonic beam. The position of the hollow region can be precisely adjusted by simply tuning the ultrasonic frequency. This enables the manipulation of individual particles or bubbles in a liquid without the need for a phased array system. Additionally, this method can be extended to multi-bubble manipulation.

Research Direction: Ultrasonic Acoustic Tweezers

Test Equipment: Transducer, signal generator, ATA-122D power amplifier, acoustic absorber, etc.

Figure 1: Experimental Setup Diagram

Figure 2: Photograph of the Experimental Setup

Experimental Procedure:
An ultrasonic transducer with a radius of 25 mm and a center frequency of 1 MHz is used to generate a planar wave field. The lens, designed to produce a localized hollow ultrasonic beam, is attached to the transducer surface and immersed in a water tank. An acoustic absorber is placed at the bottom of the tank to generate a traveling wave. The distance between the transducer and the absorber is 95 mm. The transducer is driven by a signal generator and a power amplifier (ATA-122D, Aigtek, China).

Experimental Results:

Figure 3: Experimental Results
After the ultrasonic waves pass through the lens, a localized hollow beam surrounded by a high-intensity ultrasonic field is generated. The position of the hollow region shifts correspondingly with changes in the operating frequency. By moving the transducer and lens together using a robotic arm, the position of the hollow region can be altered, enabling the captured particles or bubbles to be moved in three-dimensional space. For example, bubbles can be manipulated to follow a trajectory such as "SONO."

Power Amplifier Recommendation: ATA-1372A Broadband Amplifier

Figure: ATA-1372A Broadband Amplifier Specifications

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