Application Cases

Experiment Name: Application of Power Amplifiers in Acoustic Tweezers Particle Manipulation Experiments

Experiment Content:
By amplifying the driving voltage with a power amplifier, the efficiency of transducer vibration is enhanced. The increased driving voltage results in stronger transducer vibration, which improves the effectiveness of acoustic tweezers in particle manipulation.

Test Equipment:
Signal generator, ATA-122D power amplifier, transducer, etc.

Figure 1: Experimental Setup

Experimental Procedure:
The experiment was conducted in a container measuring 0.3 m × 0.5 m × 0.3 m. To minimize reflections, acoustic absorbing blocks were placed on the sides and bottom of the container. A signal generator produced a sinusoidal wave signal at a frequency of 2 MHz, which was amplified by an ATA-122D power amplifier and applied to a piezoelectric ceramic transducer, driving the transducer to vibrate at the same frequency. A phase plate was coupled to the transducer using coupling gel and then immersed in water. By varying the frequency, the acoustic field could be altered, enabling the controlled transport of particles along different trajectories.

Experimental Results:

Figure 2: Particle Distribution Patterns at Different Frequencies

Figure 3: Particles Moving Along Forward and Reverse Triangular Paths

By adjusting the frequency, different acoustic field distributions were achieved on the same plane, enabling the realization of a single-source, multi-frequency acoustic tweezer system. The method we designed allows particles to move along different trajectories or arrange in various patterns. Examples include rectangular particles rotating at fixed angles, particles moving selectively left or right along a line, multi-pattern particle arrangements, and a single particle following two distinct trajectories. These effects were achieved by adjusting the frequency using a signal generator connected to a power amplifier. This approach provides a flexible and real-time controllable method for acoustic tweezers, partially replacing the complexity of phased arrays.

Product Recommendation: ATA-1220E Broadband Amplifier

Figure: ATA-1220E Broadband Amplifier Specifications

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