Analog Data Acquisition

Configure analog input channels and acquire data from your device

Before you use analog input channels, see Hardware Discovery and Session Setup.

Functions

`addAnalogInputChannel`	Add analog input channel
`inputSingleScan`	Acquire single scan from all input channels
`startForeground`	Start foreground operations
`startBackground`	Start background operations
`removeChannel`	Remove channel from session object
`addlistener`	Create event listener
`stop`	Stop background operation
`wait`	Block MATLAB until background operation completes

Events

`DataAvailable`	Notify when acquired data is available to process
`ErrorOccurred`	Notify when device-related errors occur

Apps

Analog Input Recorder

Acquire and visualize analog input signals

Topics

Basic Workflows

Acquire Data in the Foreground

Acquire data from a device while MATLAB^® waits.

Acquire Data in the Background

Acquire data from a device while MATLAB continues to run.

Getting Started Acquiring Data with Digilent® Analog Discovery™

This example shows how to acquire analog input voltage data at 300 kHz.

Generate and Measure Signals with Analog Devices ADALM1000

Program a session for ADALM1000 input and output.

Tools Workflows

Acquire Data with the Analog Input Recorder

Use the Analog Input Recorder app to visualize and record analog input signals.

Multiple Channels and Measurement Types

Acquire Data from Multiple Channels

This example shows how to acquire data from multiple channels, and from multiple devices on the same chassis.

Acquire Data from an Accelerometer

This example shows how to acquire and display data from an accelerometer attached to a vehicle driven under uneven road conditions.

Acquire Bridge Measurements

This example shows how to acquire and plot data from an NI USB-9219 device.

Acquire Sound Pressure Data

This example shows how to acquire sound data from an NI 9234.

Acquire IEPE Data

This example shows how to acquire IEPE data using an NI 9234.

Acquire Data and Generate Signals Simultaneously

Acquire and generate data at the same time.

Related Information

Digilent Analog Discovery Devices

Analog Devices ADALM1000 Hardware

Data Acquisition Toolbox Properties

Featured Examples

Acquire Data Using NI Devices

Acquire data from a National Instruments device available to MATLAB® from the command line using the Session based interface.

Open Script

Acquire Continuous and Background Data Using NI Devices

Acquire analog input data using non-blocking commands. This allows you to continue working in the MATLAB command window during the acquisition. This is called background acquisition. Use foreground acquisition to cause MATLAB to wait for the entire acquisition to complete before you can execute your next command. Learn more about foreground acquisition in Acquire Data Using NI Devices.

Open Script

Acquire Data from Multiple Channels using MCC Devices

Acquire data from multiple analog input channels with MCC devices using the session-based interface.

Open Script

Acquire Data from an Accelerometer

Acquire and display data from an accelerometer attached to a vehicle driven under uneven road conditions.

Open Script

Measure Strain using an Analog Bridge Sensor

Acquire bridge circuit voltage ratio data, then compute and plot strain values.

Open Script

Acquire Temperature Data from a Thermocouple

Read data from thermocouples using NI devices that support thermocouple measurements.

Open Script

Acquire Temperature Data from an RTD

Shows how to acquire temperature data from a Resistive temperature device (RTD) and display the readings. The device is attached inside a PC case to monitor the internal temperature changes.

Open Script

Acquire and Analyze Sound Pressure Data from an IEPE Microphone

Acquire and display sound pressure data from a PCB® IEPE array microphone, Model 130E20. The sensor is recording sound pressure generated by a tuning fork at Middle C (261.626 Hz) frequency.

Open Script

Acquire and Analyze Noisy Clock Signals

Acquire clock signals and analyze transitions, pulses, and compute metrics including rise time, fall time, slew rate, overshoot, undershoot, pulse width, and duty cycle. This example uses Data Acquisition Toolbox™ in conjunction with the Signal Processing Toolbox™.

Open Script

Log Analog Input Data to a File Using NI Devices

Save data acquired in the background to a file. Use the session-based interface and acquires analog input data using non-blocking commands. If you are using the legacy interface, refer to "Logging Data To Disk" in the Analog Input examples list

Open Script

Software-Analog Triggered Data Capture

Data Acquisition Toolbox provides functionality for hardware triggering a data acquisition (DAQ) session, for example starting acquisition from a DAQ device based on an external digital trigger signal (rising or falling edge). For some applications however, it is desirable to start capturing or logging data based on the analog signal being measured, allowing for capturing only the signal of interest out of a continuous stream of digitized measurement data (such as an audio recording when the signal level passes a certain threshold).

Open Script