09-19-2011 01:32 PM
I would like to highlight the ideas and suggestions that were implemented in SignalExpress 2011 that came from this forum:
Thank you for all of your ideas and suggestions. Please keep posting your ideas as they are greatly appreciated.
09-21-2011 03:27 PM
I'm not sure how much control R&D has with the way signals are passed from one step to the other but I have a few issues that have been driving me crazy lately, especially with the new Zero Offset step.
The Zero Offset step is a very welcome addition but is there a way to just have ONE Zero Offset step per project file?
This question could also apply to any step (in the example below the Amplitudes and Levels step for instance)
Here's an example:
My latest test setup had 4 signals; two Voltage (LVDT and load cell), one Custom Voltage (string pot) and one Strain (single uniaxial strain).
I needed to offset zeros on three of those signals (LVDT, string pot and strain). These were three different signal types that required me to add three different Zero Offset steps. Couldn't the Zero Offset step be a single step that you can add any and all types of signals to and zero them all at once?
To add to the clutter in the Project Step window, I needed to view each of these signals as scalar signals so I could graph them according to my needs. Now I have to go and add 4 Amplitudes and Levels steps in order to capture the 4 signals. Here's what my Project Step window looks like:
DAQmx Acquire
Votage
Custom Voltage
Strain
Zero Offset
String Pot
Zero Offset
LVDT
Zero Offset
Strain
Aplitudes and Levels
LVDT
Aplitudes and Levels
Load
Aplitudes and Levels
String Pot
Aplitudes and Levels
Strain
Save to ASCII
And this was only 4 channels! No doubt this is very combersome and becomes confusing the more signals get added to the test.
Furthermore, does the "offsets ready 2" and "avg. counter 2" need to be in there? Seems cluttered.
BTW, thanks for the update George. All the new features are a very welcome addition!
09-21-2011 04:34 PM
I forgot I was going to add a copy of my .seproj file to show the bulk in the Project Step window
09-21-2011 05:33 PM
How would you rank various solution options?
Steps would have to handle the different units appropriately.
Seems like it is okay that the same configuration applies to all input signals (valid?).
Is the critical need just to link one click to a shared restart, zero now, etc. type of functionality?
09-22-2011 01:56 PM
How would you rank various solution options?
2. Allow signals to get added to the 'Input signals' list by dragging new signals to the input; also enable multiselect in the 'Input signals' pull down.
If I'm reading this correctly you're saying, for example, have one A&L and/or one Zero Offest step in the Project Step window and drag and drop (or multiselect) any available signals from the DAQmx Acquire step into these steps WITHOUT creating duplicate steps for each signal type.
If so YES!!!
So long as mixed signal types could be selected and added to a single step I think this would be a huge solution. I realize this may not work for all signal types but for voltage, strain and custom voltages I don't see why not.
This solution option would eliminate all the pains associated to passing mixed signal types through commonly used steps as demonstrated in my project file.
3. Provide option for DAQmx Acquire step to output all channels in single group?
Steps would have to handle the different units appropriately.
I don't think this would be necessary if solution 2 was an option.
Seems like it is okay that the same configuration applies to all input signals (valid?).
I work with mostly voltages, strain, and custom voltages where excitation is necessary. The main reason I pass the signals through the A&L step is so I can view multiple signals in real-time in a scope chart graph. So for my needs the same configuration could apply to all input signals
Is the critical need just to link one click to a shared restart, zero now, etc. type of functionality?
Yes and No. A one-click shared restart, zero now function would be great but the biggest pain is the way SE handles each signal type in a different group which forces you to create multiple indentical steps for each group.
If the step options would handle and accept all signal inputs as if they were the same, you would not need a "shared" restart, zero-now functionality.
I hope I addressed your questions appropriately without causing any confusion...
02-16-2012 09:16 AM
Singnal express
I am a big supporter of signal express, but some newer scopes like dui-tron has moved ahead of signal express do to the folowing: Has video capabilities along with data signals, another big improvement for data logging. I just need signal express to be able to capture video and display it with some sort of viewer along with analog data signals.. I do understand that i could build some sort of lab view VI and incorperate it into signal express but that defeats the purpose of signal express. Some of the lower tech. cant write in lab view. Do i need to switch to dui-tron scope or do you think this capability is possible in the near future? This would put Signal express back on top and it would be very marketable with these new options.
Thanks for your time
02-16-2012 02:15 PM
Thanks for your feedback, but we would like to verify what you want:
I think you want item 1, but wanted to be sure. Thanks for posting feedback!
02-16-2012 03:19 PM
Goggle Dewe tron sorry for misspelling it. What would be fantastic would be the following: I do not ever use the logging system. I typically do not run live so i trigger the event for aprox 5 to 10 sec then it shows up on the graph after it times out. i have hoped that there is a way to also do this with video within signal express. The ultimate goal for us is to adventually be able to sync video and data signals. Please continue with direction as I have multiple user for this application. If you want to contact me by phone it may be easier to explain some of the applications. Thanks for speedy reply.
02-17-2012 11:53 AM
I've inquired about this long ago, and I agree that video-feed support in Signal Express would be highly beneficial.
The Dewetron data acquisition system has the ability to take a video stream and add it to the display alongside the other graphs; similar to how you can arrange multiple Signal Express display types into one Data View.
The Dewetron’s recording functionality is very similar to SE’s ‘playback’ feature- in that you can replay the data file and even speed up or slowdown the playback speed. Its time-synch'd so all your analog signals match up with the video. You can save the data file to ASCII (data signals only) or export the whole window to AVI video format.
We have an older Dewetron system we use for impact testing. The video is valuable because you can see the moment of impact along with any analog signal channels (load, velocity, etc.) all on one screen.
The Dewetron’s video capability is a separate “add-on” and is hardware dependent (this may have changed in their newer systems but ours is a standalone addition). The system comes with its own video signal processor (A-D) and cam module (like a multiplexing unit). The cameras themselves are nothing fancy; power to the camera and BNC back to the video processor. As far as a Dewetron’s Data Acquisition unit goes it’s pretty standard as well.
Live video feed while monitoring your other channels is an invaluable option, but if it’s something that only higher-end platforms will support (PXI-e) it may not be worth the upgrade for those of us using SCXI.
02-23-2012 08:26 AM
Thanks for your Comments,
you seemed to know exactly what I'm talking about. I have also done some bullet impact testing where it would have been nice to have synced my high speed video with my analog signals coming in. Signal express would be top of the line scope and data acquisitions acquiring if it had this capabilities.