Application Cases

Experiment Name: Application of Power Amplifier in a Self-Powered Mechanical Wave Communication System Based on String Vibration

Experiment Content:The tin can telephone, also known as the string phone, is an ancient tool for communication and entertainment that uses the principle of sound vibration propagation to transmit sound. It is a mechanical form of “telephone” that does not rely on electricity. Based on this principle, a vibrator is used as one end for transmitting signals, and a triboelectric sensor is used as the other end, with a thin string connecting the two, forming a self-powered mechanical wave communication system based on string vibration. The signal generated by the signal generator is amplified by the power amplifier to drive the vibration of the vibrator. The vibration signal is transmitted through the string to the triboelectric sensor, where it is received and processed to achieve the generation, transmission, and decoding of the modulated signal.

Research Direction:Triboelectric Sensors

Testing Equipment:ATA-304 Power Amplifier, Oscilloscope, Signal Generator, Vibrator, etc.

Figure: Photograph of the Experimental Setup

Experiment Process:A planned encoded signal is designed and input into the signal generator to produce an analog signal. The output end of the signal generator is connected to the ATA-304 power amplifier, which amplifies the signal power to drive the vibration of the vibrator. The vibration signal is transmitted through the string to the designed triboelectric sensor, where it is received and further processed through a computer program to complete the mechanical wave communication system based on string vibration.

Experiment Results:

Figure: Experimental Results

In the self-powered mechanical wave communication system based on string vibration, the signal generated by the signal generator is amplified by the power amplifier to drive the vibration of the vibrator. When the modulated signal input to the power amplifier from the signal generator is 5V, the amplitude of the vibration signal generated by the vibrator after power amplification is 200μm, and the signal voltage received at the receiving end is approximately 200mVpp. Through further processing at the sensor receiving end, the entire system successfully achieves the complete process of generating, transmitting, and decoding the modulated signal.

Power Amplifier Recommendation:ATA-304C Power Amplifier

Figure: Specifications of the ATA-304C Power Amplifier

Xi’an Antai Electronics is a high-tech enterprise specializing in the research, development, production, and sales of electronic measurement instruments such as power amplifiers, high-voltage amplifiers, power signal sources, preamplifiers for micro-signals, high-precision voltage sources, and high-precision current sources. It provides users with competitive testing solutions. Aigtek has become a widely recognized supplier of instruments and equipment in the industry, with a broad product line and considerable scale. Sample units are available for free trial.