Application of Power Amplifier in Underwater Active Electric Field Object Shape Imaging System
Experiment Name: Application of Power Amplifier in Underwater Active Electric Field Object Shape Imaging System
Research Direction: Underwater Active Electric Field Imaging
Experimental Equipment: Signal generator, data acquisition card, electrode sensing device, ATA-308 power amplifier, computer, etc.
Figure: Structural Diagram of the Underwater Active Electric Field Shape Recognition System
Experimental Content:
Based on the biological mechanism by which weakly electric fish recognize objects, an underwater active electric field object imaging system platform was constructed for experiments.
Experimental Procedure:
The signal generator produces an excitation signal, which is amplified by the power amplifier to a specified gain. The amplified signal is then transmitted into the water environment through the transmitting electrode of the electrode sensing device, establishing an underwater active electric field detection environment centered around the transmitting electrode within the water tank.
The electrode sensing device consists of both transmitting and receiving electrodes. The function of the transmitting electrode is to be immersed in water and continuously emit electric field signals, while the receiving electrode is responsible for being immersed in water to capture disturbed underwater electric field signals from the environment in real time.
Both the rotating platform and the three-axis motion device are driven by stepper motors. Their coordinated movement enables frequency-sweeping experiments of the electrode sensor on the object under test from different directions.
Figure: Underwater Active Electric Field Shape Recognition System
Experimental Results:
When the amplitude of the excitation signal voltage is relatively low, the underwater active electric field imaging is susceptible to system and environmental noise, resulting in weak anti-interference capability. As the excitation voltage amplitude increases, the coverage of the underwater active electric field expands, the amplitude of the received signal significantly increases, and the characteristic value calculated by the RFAC algorithm increases accordingly with the voltage amplitude.
Figure: Experimental Results
Figure: ATA-308C Power Amplifier Specifications and Parameters