I want my piezo actuator to give a sinusoidal load as output and thus keep the forces (max, min and mean) constant. To do this I need a close loop control with a load cell I think. However the controller only has a strain gauge sensor. So I want to know how I can make the load cell and controller communicate via LabView (programming software which can do force control). Which components am I missing?
Piezo actuator: https://www.physikinstrumente.com/en/products/linear-actuators/nanopositioning-piezo-actuators/p-845-preloaded-piezo-actuators-101215/
Piezo controller: https://www.physikinstrumente.com/en/products/controllers-and-drivers/nanopositioning-piezo-controllers/e-625-piezo-servo-controller-driver-604100/
load cell (DCE-500N): https://www.lcmsystems.com/dce-stainless-steel-stud-type-tension-and-compression-load-cell
analog load cell amplifier: https://www.lcmsystems.com/sga-analogue-strain-gauge-amplifier
I understand that you need to control the piezo actuator according to load cell output through amplifier. Please check the load cell amplifier module has an option of output 10V, 5V etc. Now you need to used DAQ card to acquire signal from load cell and actuate piezo accordingly by your own program in LabVIEW.
Robin,
What's your budget and schedule?
This is not a trivial project: it might easily take a few months to get it working.
You'll need some more hardware.
As Dr Dubey pointed out, you will need a data acquisition card (DAQ) with the ability to read at least a handful of analogue channels, and the ability to output a few too.
National Instruments makes a great many such devices.
Ranging from USB-connected 'widgets' such as:
* https://www.ni.com/en-my/support/model.usb-6008.html
to PCI cards such as
* http://sine.ni.com/nips/cds/view/p/lang/en/nid/11913/
Which card will depend on how finely (how many bits) you want to measure the signal from the load cell (it's a Wheatstone bridge, right? So, it will need a stabilized regulated supply, and you will have to read two channels) and how quickly you want to measure them.
You then need to acquire a copy of LabVIEW. Depending on the version, you might have to write your own PID loops, or not - that will depend on your budget and whether the department can obtain an educational licence.
Dear Robin D'Haese,
Also i suggest you to see links and attached files on topic.
https://www.pi-usa.us/en/products/controllers-drivers-motion-control-software/motion-control-software/
https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2421
http://www.ni.com/getting-started/set-up-hardware/data-acquisition/accelerometers
Best regards
I also did force analysis by using single-axis force sensor or load cell at different speeds and acceleration excitation of the actuator. As dr. Dubey said that you have checked the load cell amplifier module and set the output value according to your designated value. I et on 5V. Then you should used DAQ (data acquisition card) to show force sensor values in the sinusoidal form and actuate the piezo by the instructed value set in your LabView.
Also, check the attached file on the topic
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