Application Cases

Experiment Name: Application of Power Amplifiers in Electromagnetic Systems

Experimental Content:
To address the challenges associated with using motors to drive micro-manipulators, this study proposes a method that directly utilizes magnetic field forces for actuation. A power amplifier provides a stable voltage to the magnetic drive system, enabling the micro-manipulator to perform linear motion and linear vibrations under the influence of the magnetic field. These capabilities allow for operations such as gripping, transporting, releasing, and assembling micro-targets, demonstrating significant potential for industrial applications.

Experimental Objective:
To achieve flexible motion of micro-manipulators at the microscale using magnetic field actuation.

Testing Equipment: ATA-3090 Power Amplifier, Signal Generator

Experimental Procedure:
"Magnetic field-driven micro-manipulators were used for relative motion-based gripping and vibration-assisted active release. Microspheres with a diameter of 97 μm were selected as the operation targets. The entire experiment was conducted in water, following the procedure outlined below:

1. Set the initial parameters so that the distance between the tips of the two micro-manipulators exceeds the diameter of the microspheres. Use a motorized stage to position the microspheres between the two micro-pipettes.

2. Adjust the power amplifier to increase the voltage supplied to the electromagnetic system, causing the active tip to move in the positive Y-direction, thereby enabling the two micro-manipulator tips to grip the microspheres.

   
   

3. Use the motorized stage to transport the two micro-pipettes, along with the gripped microspheres, to the target position.

4. Adjust the power amplifier to decrease the voltage supplied to the electromagnetic system, causing the active tip to move in the negative Y-direction, thereby opening the two fingers and releasing the microspheres.

5. If microspheres adhere to the longer active tip, apply a sinusoidal voltage to the electromagnet via the power amplifier and signal generator to vibrate the active tip, facilitating the release of the adhered microspheres."

   
   

Experimental Results:
The magnetically driven micro-manipulator successfully gripped microspheres of various sizes, released targets adhered to the tips, and ultimately assembled them into two-dimensional patterns. Additionally, the magnetically driven micro-manipulator demonstrated advantages in stability, efficiency, and precision.

Figure: ATA-3090C Power Amplifier Specifications and Parameters