Digilent WebDAQ 504: Internet Enabled Vibration-Acoustic Data Logger

The Digilent WebDAQ 504 is a stand-alone, vibration and acoustic data logger designed for remote monitoring, analysis, and control. All the intelligence is built into the WebDAQ, eliminating the need for a PC or additional software. By using the embedded WebDAQ web server, users can easily configure simple or sophisticated applications, log data, update digital outputs and/or send notifications based on alarm conditions, and view real-time data from any location and any device with a web browser. The WebDAQ 504 provides four simultaneous IEPE inputs for measuring sensors like accelerometers and microphones plus four isolated digital bits that can be used as trigger inputs or alarm outputs. Housed in a heavy-duty chassis, the WebDAQ 504 is rugged enough for industrial applications.

The WebDAQ Series embedded OS and web server provides an all-in-one package for stand-alone data logging and alarming. Users can monitor and control their applications from anywhere with a web browser. The WebDAQ web server is optimized for both desktop and mobile use. Users can perform data acquisition tasks from phones, tablets and laptops with a single, intuitive user interface.

An embedded web server provides a clean, intuitive interface to access all configuration and data management tasks. Hardware, trigger and alarm settings are contained in a single task, or “job”. Multiple “jobs” can be run in a “schedule” for more complex data logging applications. For example, users can create a schedule of jobs in which one job automatically runs after an alarm condition is triggered on a different job, such as when a digital input changes.

Install the WebDAQ 504 on any network and access it using any device with a web browser to remotely monitor and control all operations.

Users can create multiple alarms using analog or digital channel sources. Configure alarms to reset and re-arm when the condition clears, or reset them remotely with your browser. View the alarm status on the web interface. Receive event and alarm notifications on one or more addresses using email and SMS messaging

Store data files and configuration settings locally in internal flash memory, or save to external media or network folders. Users can map a network drive or FTP server as the location to log data or store files. Easily transfer files between WebDAQ storage locations and mapped network storage locations.

View data as it is acquired or from a stored file. Data can be plotted on strip chart and FFT displays. Users can specify a range of data to view. Real-time FFTs allow continuous monitoring and analysis. Users can apply windowing parameters with software.

The WebDAQ performs simultaneous measurements from up to four analog inputs at rates of up to 51.2 kS/s per channel. Users can configure each input for voltage or IEPE sensor measurements.

An FFT is displayed for each active channel in a job on a single FFT plot. The WebDAQ 504 performs a spectrum function on the time-domain data and displays the amplitude of the frequency response. The data is scaled in dB based on the full-scale range of the sensor for that channel. Users can configure the window type to apply to the FFT data for each channel. The following window types are supported: Hann, Hamming, Blackman-Harris, Blackman, Flattop, or None (Uniform). The peak amplitude and frequency can be shown or hidden, as desired.

The four isolated digital I/O lines can be used either as triggers to start or stop the acquisition or as alarm outputs.

For users requiring more custom functionality than is provided by the web browser interface, a RESTful API is provided to start and stop an acquisition, retrieve data in real-time, access information about the system, schedules, and jobs, and to get the status of an acquisition and alarm(s). With the RESTful API, data from WebDAQ devices can be displayed on any popular data dashboard, cloud application, or custom program.