This version is outdated by a newer approved version.
This version (22 Nov 2022 07:42) was approved by Mark Ochoco.The Previously approved version (18 Nov 2022 08:06) is available.
This version (22 Nov 2022 07:42) was approved by Mark Ochoco.The Previously approved version (18 Nov 2022 08:06) is available.This is an old revision of the document!
Table of Contents
USB 3.0 Based Multi-Channel Test Platform for Vibration Sensors User Guide
General Description
CN0582 or the USB 3.0 Based Multi-Channel Test Platform for Vibration Sensors is a system board capable of reading data from analog (IEPE) accelerometers. The analog IEPE inputs also contain current source switches to accommodate sensors that might need external power and individual channel offset voltage setting.
Aside from IEPE sensor measurements, the board is also an arbitrary sine wave generator providing stimulus to an external vibration shaker and a multi-channel data acquisition system.
Requirements
The USB 3.0 Based Multi-Channel Test Platform is a complete system from Hardware, Firmware, to Software for performing basic Data acquisition (DAQ) functions and vibration tests.
The following sections will detail the necessary steps and conditions needed to fully operate the system.
Firmware
Once the USB 3.0 Based Multi-Channel Test Platform software is installed via the given installer (Refer to the Installation Guide section), the compatible firmware is located within the same folder as the GUI executable file.
At startup, the GUI uploads the firmware to the board for easier use. Do not remove the firmware (.img file) in the folder to avoid errors. 
Should there be any updates necessary, uninstall the GUI and corresponding files using the uninstaller (C:\Analog Devices\USB3.0 Based Multi-Channel Test Platform for Vibration Sensor\Uninstall.exe). An updated installer containing the updated firmware and other files will be uploaded for download.
Equipment Needed
- Computer running Windows 10 OS
- Signal Generator (optional).
- Digital Multimeter (optional).
- Vibration Shaker (i.e., King Design).
- Piezo Reference Sensor (i.e., 352C67 from PCB Piezotronics).
- Test Sensor (i.e., Type 4394 from Brüel and Kjær).
Accessories Needed
- BNC-to-SMA cable (x1).
- SMA-to-SMA cable (x4).
- USB Type C cable
- 5V power Supply(optional).
Power Supply Requirements
The board can be powered up via USB3.0 or external Power Supply: 
The Multi-Channel Vibration Test Platform can automatically prioritize the external power supply if detected then switch back to USB port if unplugged. Since Multi-Channel Vibration Test Platform has the capability to operate as Dual-Role Port (DRP), it can also adjust power requirements as needed based on the application such as when a device is connected, it will provide power and will act as HOST.
NOTE: For the External Power Supply, the Recommended voltage is from 4.5V to 5.5V.
Installation Guide
The CN0582 Evaluation Software.exe is a single file installer that includes the GUI installer, uninstaller, and driver installer. The installer will create the files and folders required to operate CN0582 and the corresponding applications.
GUI Installer
This will setup the dependencies folder which will also contain the USB 3.0 Based Multi-Channel Test Platform GUI executable file.
Driver Installer
Running the driver installer is necessary to fully setup the necessary drivers and make the board recognizable by the software.
GUI Removal
To uninstall the GUI, run the file named Uninstall.exe in the same location as the GUI executable file. Running this will remove the folder created by the installer and its contents.
The folder containing the screenshots from the file export functionality (Multi-Channel Vibration Test Platform File Exports folder) isn’t deleted by this installer so this should be deleted manually.
Quick Start Guide
Interconnection
The Multi-Channel Vibration Test Platform requires any type C connector to interface with host and is backward compatible with USB2.0. For Best performance, it is recommended to connect with USB3.0 ports and corresponding cable.
Boot options
The Multi-Channel Vibration Test Platform has 2 boot options: SPI and USB boot. SPI boot loads the firmware stored in the SPI flash memory, if any. This is useful when a custom firmware already loaded onboard is needed or for instances where the board would undergo a power restart and immediate loading, with no software intervention, is needed.
The other option, USB boot, is the default for all CN-0582 boards. Restarting the board in this mode registers the board as a bootloader instead of a valid device. This allows bundling the software with the hardware since the GUI will be responsible for uploading the firmware to the board and not having the necessary software renders the hardware unusable.
BOOT
USB
SPI
S1-1
ON
OFF
S1-2
ON
ON
USB Boot
SPI Boot
GUI Usage
The Multi-Channel Vibration Test Platform Board default boot setup is for USB boot, allowing the firmware to be loaded via software. The installer, once done running, sets up the dependencies, firmware, and the executable file to run the GUI itself.
At every startup, the GUI uploads the firmware and proceeds if successful. Otherwise, the GUI won’t proceed while giving prompts for next actions.
At exit, the GUI resets the different board settings such as the signal generator output amplitude and frequency, channel offset, and current source button status. This is for the board to have a known state upon exit and ensure safety for connected components.
Graphical User Interface Start Up
DAQ Settings
The DAQ window allows changing the capture parameters for each channel such as current source, coupling, and gain. The signal generator output can also be set here as well as data capture for Time and Frequency Domain.
1. Device Selection
Listed through the dropdown are all the Multi-Channel Vibration Test Platform Board your machine detects where the user is required to choose one (1) to be paired with the GUI.
It’s assumed that Multi-Channel Vibration Test Platform devices are only to be used with the GUI. Connecting a non 4CH. DAQ board or one with different firmware will result to an incorrect or different string message.
2. Number of Cycles
This determines the number of cycles to be displayed in the Graph Display. The dropdown menu contains the options for the number of cycles (1, 2, 3, 4, 5 or full cycle) that can be applied.
3. Channel Settings
This control group gives control to different input parameters per channel such as sensor dc bias, current source toggling, and gain.
Note: It is best to check the IEPE sensor requirements before using supplying external power supply to avoid incurring permanent damage to either board or sensor.
Current Source
This control group is responsible for providing a standard IEPE sensor an external power supply if needed (4mA / channel). Individual channel external power supply is enabled/disabled by toggling their corresponding slider.
4-20mA Sensor Mode
Channel 3 provides an interface for interfacing with 4-20mA sensors upon toggling the slider under Channel 3 in the GUI:
By default, this is unselected to cater to other input sources. Enable this by toggling the slider.
Coupling
Allows either DC or AC coupling of the input signal. The coupling selected affects the necessary offset to ensure optimal data capture. Refer to input offset section.
Channel Gain
Allows changing the signal gain for a corresponding channel.
Allowable Gain Values:
- 1
- 2
- 5
- 10
- 20
- 50
- 100
Sensor DC Bias
The sensor DC bias converts the input based on corresponding sensor's bias specification to a voltage offset such that the signal falls within the ADC's optimal capture range.
Channel Selector
The Channel selector buttons control which channel or channels are displayed in the graphs. Should have at least 1 selected channel before data capture.
Capture Mode
This button selects whether to perform a single capture (snapshot) or a continuous capture of the selected plot type (Time, Frequency, Both).
5. Signal Generator Settings
This control group allows the changing of the board’s signal generator output parameters.
Frequency
In the frequency field, type the frequency you want to set in Hertz (Hz). Allowable frequency values are from 0 to 25 kHz. Once a frequency has been chosen, click the SET button on the right side of the field.
Amplitude
The amplitude field dictates the output amplitude (in peak to peak, Volts) from the BNC connector. Valid values are from 0 to 3300mV (3.3Vpk2pk ~ 1.2Vrms). Once an amplitude has been set, click the SET button on the right side of the field.
Bandwidth
Allows selection between two different output paths: a) Full bandwidth or no Sallen Key Filter or b) 25kHz Sallen Key Filtered output. Toggle the slider to the desired output path.
6. Graph Display Settings
This control group allows changing the visualization parameters to match the intended range of observation or region of the waveform/s.
Plot Type
Selects the plot type for the DAQ window (Time, Frequency, or Both). Pressing START without a selected plot type will yield a prompt message.
- Time Domain
Plots time domain data for enabled channels. Y-axis is Volts, X – axis is time (uS).
- Frequency Domain
Plots frequency domain data of enabled channels. Y-axis is dBm, X – axis is frequency (Hz).
- Time and Frequency Domain
This plot option allows simultaneous display of both Time and Frequency Domain representation of captured data.
File Export
Saves a screenshot of the selected graph/s.
- Time Domain
Saves screenshot of Time Domain graph.
- Frequency Domain
Saves screenshot of Frequency Domain graph.
- External Trigger
When selected, a positive pulse must be sent to the trigger in connector to begin capture, allowing beginning of capture via hardware trigger.
Vibration Test
Vibration Test process for calibrating one or more DUT vs. a reference sensor.
1. Device Selection
Listed through the dropdown are all the Multi-Channel Vibration Test Platform Board your machine detects where the user is required to choose one (1) to be paired with the GUI. Refer to the Device Selection section.
2. Sine Sweep Range
The frequency range for the vibration test to be performed.
- Start Frequency - Initial frequency for the vibration test.
- Frequency Step - Frequency step from one frequency point to another.
- Stop Frequency - Final frequency for the vibration test.
3. G-Settings
Sets the amount of G to be used and the measure
- Peak
- Peak to Peak
- RMS
4. Limit Lines
Shows line options available to display with captured data for limit testing
- 3dB Line
- 10% Sensitivity
- Both
5. Reference & DUT Sensor Setup Section
Current Source, Coupling, Gain, and Sensor DC Bias settings operate similar to DAQ counterpart. Refer to DAQ section for reference on these items.
Sensor Sensitivity
Sets the sensitivity (Volts / G) for each sensor attached on the input channels. Channel 0 (topmost) serves as the reference amplitude for the vibration test while other channels are for other DUT.
Enable
Selects which channels would be displayed for the vibration test results. Default settings: CH0 always enabled, other channels enabled upon toggling.
ADXL digital sensor functionality not yet incorporated as of this version.
6. Graph Display Settings
Plot Type
Selects the plot type to be displayed. Options include Voltage scale, DUT, or Self-Scan.
- Voltage Scale: amplitude setting used to reach target sensitivity for each frequency point.
- DUT: compares reference channel measurement with DUT from other channel/s.
- Self-Scan: reference channel + setup calibration.
Plot Scale
Selects the scale for the Y-axis of the graph. Options include Magnitude (g), Decibel (Log(g)), Vrms, or Decibel (Log(Vrms)).
- Magnitude (g): Y-axis is in g’s.
- Decibel (Log(g)): Y-axis is log(g)
- Vrms: Y-axis is in Vrms.
- Decibel (Log(Vrms)): Y-axis is log(Vrms).
Graph Display
Displays the reference sensor and DUT amplitude/s vs. frequency for the performed vibration test.
File Export
Exports screenshot of Frequency Response graph.
External Trigger
Similar to external trigger from DAQ section.
Sine Generation Window
This window is used for generating a sweeping sinusoid pattern:
1. Device Selection
Refer to the Device Selection section.
2. Amplitude
Sets the amplitude of the sinusoid to be output from the board (in mVpp).
3. Sine Generation Range
The frequency range of sinusoids to be output.
- Start Frequency – starting frequency to be generated to the output.
- Frequency Step – increment from one frequency point to another.
- Stop Frequency – last frequency to be generated to the output.
4. Duration Per Frequency(mS)
Delay (in milliseconds / mS) before switching from one frequency output to another.
Hardware Setup
Before simulating the program, setting up the hardware is necessary.
- Connect the EVAL-CN0582 to the Vibration Shaker using a BNC connector.
- By using SMA connector, connect the Piezo Reference Sensor of the Vibration Shaker to channel 0.
- Attach another SMA connector from the Test Sensor going to channel 1 of the EVAL-CN0582.
- Power up the CN0582 by connecting the Type C end of the USB cable to the board and the other end to the host. There should be a RED and GREEN LED lit up on the board to note proper power up.
How to Use the Program
To test the program with IEPE sensors the following equipment is needed:
Equipment needed:
- EVAL-CN0582-USBZ.
- BNC-SMA coaxial cable.
- USB C cable
- Analog input source (optional): Signal Generator (Square, Sine, Sawtooth etc.)
IEPE Accelerometer (i.e., PCB MC325C67) + Shaker + SMA coaxial cables.
Procedure:
1. Run the CN0582 Evaluation Software. Follow the prompts until the GUI main window appears. Only the GREEN LED should be lit up on the board to note a successful firmware upload as well.
2. Navigate to the DAQ or Vibration Test window by clicking the following image on the left side of the GUI.
3. Depending on the available setup, perform the following actions:
- IEPE Accelerometers + Shaker: Connect one accelerometer (reference) to Analog Input Channel 0. If applicable, connect the other accelerometers to other Analog Input Channels.
- With or without external signal generator: Use the BNC-to-SMA coaxial cable to connect the signal generator output to Analog Input Channel 0. If there’s an external signal generator, connect this to another Analog Input Channel.
- The Shaker must be initially off before setting and running the necessary parameters.
4. Toggle the current source (for IEPE accelerometer), gain, coupling, and sensor dc bias settings as needed. 
DAQ Window Settings
Vibration Window Settings
5. On the channel selector section, enable the channel where the other Analog Input source is connected.
6. Click set when the parameters have been chosen, then press Start to launch the test.
resources/eval/user-guides/circuits-from-the-lab/cn0582.1668760174.txt.gz · Last modified: 18 Nov 2022 09:29 by Michelle Claire So