How are they events fall into three categories?

Hi all

My name is Sean Cummings. I am very new to Labview and this is my first post on the forum. I work for a car components plant trial. I run tests red blood cells and build parts. I recently ordered a new test stand at our location that came from another one of our facilities. The impact on axles test cell. Program Labview that we use to run the cell was created by one of our programmers little. He is very busy and works at another facility, so I took it on me to learn more about Labview and try on my own to make improvements to the software. I intend to attend some of the Labview Core classes if I find that I enjoy working with the software (until now I do).

Currently, the program is mostly manually controlled. Paths and controls such as speed are controlled by the operator. There is a cycle of 4 seconds automated in which orders VI Labview clutches to initiates the data on the incidence and acquired 3 load cells and a speed sensor. Once this cycle over the operator must click on a button to open a call from reference Subvi. The Subvi analyzes the data of incidence and displays a chart as well as several points of calculated data. The operator must then open an excel spreadsheet and enter data manually. I created the worksheet with conditional formatting to show the operator if the impact event was in the acceptable range and to monitor impacts with target in the target range and under the target. Currently, each part runs 400 cycles of the impact and the operator must transfer 6 data points for each impact. In the next two weeks we will be test it parts will 1640 impact cycles. We need a better solution to make the process more efficient.

My original thought was to have the Subvi automatically fill in the excel worksheet. After that several days of trials and errors, I could talk to a programmer from another school who explained to me that excel has not not a text based software and my methods would not work without the excel toolkit Labview.

I then talked to the engineers within my company and they agreed with me that the excel worksheet is not necessary if Labview could follow the events of the impact internally. Then, I put to work trying to create indicators and counters to track the impact events. For that to work, I only need to look at a number. This number is the total output of the impact event torque. I created 3 Boolean flags on the main VI. One of the impacts on the target, all in the range and the other under the target. I also have 3 indicators corrosponding to view counts for each. I also need an indicator showing the events of the total impact and an indicator showing the events impact valid (the sum of the range or above target).  I use the target control. The range is + or - 5% of the target. I did my best to search and try to do it myself, but I can't do the things well. I use while loops count. I'm having problems with several charges for the same event. I also want to trigger the counters at the same time and has no control of the separate judgment for each.

For this to be effective, I'll probably have to do these functions a Subvi. I would need to initiate during the call by reference 'analysis' Subvi and stop when he stops then maybe they can just be part of the Subvi.  I need indicators and control for target on the main INTERFACE. I also need a button to reset the counts, when the direction of impact and the target is changed.

I apologize for any misuse of terminology. I also apoligize if my program is a mess. This is very new to me and I am trying to learn as much as possible. You thank all in advance for your help.

-Sean-

Here is a quick sketch that could classify an impact and keep the counts in a shift register. See if it makes sense for you. Maybe you can reuse some of the ideas in your real application.

(I assume that the results are always positive)

(You have not included your typedefs, so I had to interrupt them).

Tags: NI Software

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