CN0301: Universal LVDT Signal Conditioning Circuit

If you have questions about CN0301, please post them below.

Parents
  • Hi, Brandon,

    I have two questions about CN0301_Evaluation_Software.

    Question 1

    When I choose the units of Inches or Millimeters, the change in value on channel 2 is the same. Why? The units we choose are different, but the change in value is the same. For example, they all go from 0.0156 to 0.0176.

    Question 2

    When I change the maximum stroke range of the LVDT, the values on channel 2 are quite different. For example, when I set 0.20 inches, the value on channel 2 go from 0.0030 to 0.0036. When I set 1.00 inches, the value on channel 2 go from 0.0156 to 0.0176. What the relationship?When you do an experiment, how do you set the maximum stroke range of the LVDT?

    Regards,

    Gissoes

Reply
  • Hi, Brandon,

    I have two questions about CN0301_Evaluation_Software.

    Question 1

    When I choose the units of Inches or Millimeters, the change in value on channel 2 is the same. Why? The units we choose are different, but the change in value is the same. For example, they all go from 0.0156 to 0.0176.

    Question 2

    When I change the maximum stroke range of the LVDT, the values on channel 2 are quite different. For example, when I set 0.20 inches, the value on channel 2 go from 0.0030 to 0.0036. When I set 1.00 inches, the value on channel 2 go from 0.0156 to 0.0176. What the relationship?When you do an experiment, how do you set the maximum stroke range of the LVDT?

    Regards,

    Gissoes

Children
    •  Analog Employees 
    on Jan 2, 2019 10:25 PM over 1 year ago in reply to Gissoes

    Hi Gissoes,

    We provide the source code for the CN0301 LabVIEW GUI up on our FTP site (ftp://ftp.analog.com/pub/cftl/CN0301/1.0.1/CN0301-Evaluation%20Source%20Code.zip ).  We provide that so customers if they want can go in and tweak/modify things they may need to.   I do need to tell you that we don't support customized code, so if you do change anything you do so at your own risk.  We provide it as a service and jump start point.

    I have asked one of our apps engineers to see if he can help answer your questions on the current supported software.

    Brandon

    •  Analog Employees 
    on Jan 7, 2019 3:04 AM over 1 year ago in reply to Gissoes

    Hi Gissoes,

    We have checked and validated the results you were getting for both questions that wrote.

    for question 1: as per reviewing the source code, the conversion unit was not implemented and therefore needs to be added by editing the software where the link was provided by Brandon. 

    for question 2: we were able to encounter same issue when the LVDT sensor was not properly connected to the terminal.  once the connection was fixed properly, the reading correctly corresponds again to the max stroke provided.  kindly make sure that the sensor was properly connected to theboards terminal input connector.

    Cheers,

    Erbe

  • Hi erbe,

    You said "once the connection was fixed properly, the reading correctly corresponds again to the max stroke provided",how can I understand it? Can I understand that if the connection is fixed properly, whatever I set the maximum stroke range of the LVDT, the change in value on channel 2 is the same. If not, can you give me an example so that I can judge  whether my connection is right or not. 

    Cheers

    Gissoes

    •  Analog Employees 
    on Jan 8, 2019 3:52 PM over 1 year ago in reply to Gissoes

    Hi Erbe,

    Would you be able to supply a picture of the LVDT connected both correctly and incorrectly, along with the corresponding screen shot of the software.  This would probably help Gissoes figure out what was wrong.

    Cheers,

    Brandon

    •  Analog Employees 
    on Jan 9, 2019 5:54 AM over 1 year ago in reply to Gissoes

    Hi Gissoes,

    I have made some edits with the script and the updated software can be downloaded from this link:

    ftp://ftp.analog.com/pub/cftl/CN0301/1.0.2/.

    let me know if the unit conversion works fine from your end.

    Cheers,

    Erbe