LabVIEW Application
- LabVIEW can work with Data Acquisition (DAQ) Platforms in order to capture signals from a variety of instruments.
- These include the instruments you have used so far in ME241, such as Thermocouples, Pressure Transducers, Load cells, Strain gages (& anything that uses a Strain gage),Linear Variable Differential Transformers
- We capture data in the form of electrical signals by wiring our instrument into a DAQ device.
- These devices include boards that plug into the PC via a USB-port or…More sophisticated devices that use PCI cards inside a PC that plug into some benchtop device.
- The DAQ devices allow us to capture signals from a given instrument.These instruments allow us to measure the physical phenomenon that we are interested in.
LabVIEW VI Creation
- In class and laboratory we have used LabVIEW to write virtual instruments (VIs).
- We typically write a VI so that it can “talk” to the outside world (the experiment on the bench).
- In order to do this we use the DAQ Assistant.
DAQ Device Output
- Most DAQ devices have the ability to generate signals as well as collect signals.
- The DAQ devices are able to do this via the port they connect to via a cable.
- Most standard DAQ devices can generate a signal of 5-10 VDC.
- This voltage is ample enough to power some small transducers and instruments.
- This is important to the proper collection of data.
Voltage Output
- Most DAQ devices have the ability to produce their own signals.
- We can use these signals to interact with the experiment or equipment we are using.
- We can use these signals to power equipment.
- We can use these signals to trigger events and make stuff happen.
- Note the ANALOG side of the USB devices near your computers.
- There should be terminals labeled AO0 and AO1
- AO stands for Analog Output.
- Most of the NI devices have at least 2 such terminals
- For output we wire a terminal and a ground
Some demo applications also available
LabVIEW Application
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