Problem with 3 accelerometer using python

Sarun8755 — Wed, 04 Oct 2023 12:54:36 GMT

I have struggle with 3 accelerometer(Model 352c33) using with DAQ(NI-9230BNC + cDAQ-917) with this code:
import nidaqmx
import csv
import time
import numpy as np

# Define your accelerometer channel names here
accelerometer_channels = ["cDAQ1Mod1/ai0", "cDAQ1Mod1/ai1", "cDAQ1Mod1/ai2"]

# Create a task for analog input for each accelerometer channel
tasks = []
for channel in accelerometer_channels:
task = nidaqmx.Task()
task.ai_channels.add_ai_voltage_chan(channel)

# Set the voltage range for each channel (adjust as needed)
task.ai_channels[-1].ai_max = 5.0 # Set the maximum voltage to +5V
task.ai_channels[-1].ai_min = -5.0 # Set the minimum voltage to -5V

tasks.append(task)

for i in range(30):
# Start all tasks
for task in tasks:
task.start()

# Read data from all channels
data = [task.read(number_of_samples_per_channel=10000) for task in tasks]

# Stop all tasks
for task in tasks:
task.stop()

# Create a time axis
time_axis = np.arange(len(data[0])) / 10000 # Assuming the same sampling rate for all channels

# Save data to a CSV file
csv_file = f"vibration_data{i}.csv"
with open(csv_file, "w", newline="") as file:
writer = csv.writer(file)
writer.writerow(["Time (s)", "Channel 0", "Channel 1", "Channel 2"]) # Write header row
for t, ch0, ch1, ch2 in zip(time_axis, *data):
writer.writerow([t, ch0, ch1, ch2])

# Sleep to wait for the next trial (optional)
time.sleep(10.0) # Sleep for 10 seconds between trials

# Close all tasks
for task in tasks:
task.close()
Before this code i can use 1 accelerometer to detect vibration signal, but when i adjust the code to use 3. It only detect 1, i can’t use 3 together

topic Problem with 3 accelerometer using python in LabVIEW Code Questions

Problem with 3 accelerometer using python