Arduino-Based Signal Acquisition Pipeline

Hardware Platform

The Arduino Mega 2560 serves as the data acquisition controller, interfacing with analog sensors through its 10-bit ADC channels. For higher resolution, we use external 16-bit ADC modules (ADS1115) connected via I2C.

Sensor Configuration

Our standard sensor array includes:

• Piezoelectric accelerometers for vibration capture
• Electret microphones for acoustic signal acquisition
• Hall-effect sensors for electromagnetic field measurement

Data Pipeline

Captured signals are streamed over serial to a Python-based acquisition server, which performs real-time buffering, timestamping, and storage. The pipeline supports sampling rates up to 10 kHz per channel across four simultaneous channels.

# Python acquisition server
import serial
import numpy as np

ser = serial.Serial('/dev/ttyACM0', 115200)
buffer = np.zeros((4, 10000))  # 4 channels, 10k samples

for i in range(10000):
    line = ser.readline().decode().strip()
    values = [int(v) for v in line.split(',')]
    buffer[:, i] = values