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Original question:

DLPNIRNANOEVM: Reducing measurement time / system integration

DLPNIRNANOEVM: Reducing measurement time / system integration

Simon Ilgenfritz
Prodigy 230 points
Part Number: DLPNIRNANOEVM

Hello again,

first of all thanks to Eric Pruett who supported me concerning my questions on the use of optical fibers. I decided to use a flexible fiber with 5mm active core diameter. This makes the coupling very easy.

Now I have two more questions:

1. Could You please provide me a 3D model (step file) of NIRScanNano? We would need this to integrate the sensor into an existing machine.

2. The resulting overall measurement time in my project is currently 0.45s. The scan itself takes 0,30s. The process os transfering data via USB takes 0,12s. 0,03s are rquired to do the spectral analysis and to communicate with the PLC. My question: Is it OK that transfering data from the Controller to the PC takes 0,12s? Using USB 2.0 with up to 480 Mbit/s and sending only 3822 Byte of data, I would have estimated a transfer time of less than 1ms. Maybe this is normal, because the controller needs some time for internal calculations!?

Thanks & Regards,

Simon

  • 0
    TI__Mastermind 20045 points

    Hello Simon,

    You can find the available CAD files under "Design Files" at http://www.ti.com/tool/TIDA-00554.

    We will have to look into what information we have available related to measurement and transfer time.

    Thanks,

    Kyle

  • 0 in reply to Kyle Rakos
    TI__Genius 10925 points

    Hi Simon, 


    1. Could You please provide me a 3D model (step file) of NIRScanNano? We would need this to integrate the sensor into an existing machine.

    TI> Kindly check "Design files (16)" section on this link for 3D assembly files.

    2. The resulting overall measurement time in my project is currently 0.45s. The scan itself takes 0,30s. The process os transfering data via USB takes 0,12s. 0,03s are rquired to do the spectral analysis and to communicate with the PLC. My question: Is it OK that transfering data from the Controller to the PC takes 0,12s? Using USB 2.0 with up to 480 Mbit/s and sending only 3822 Byte of data, I would have estimated a transfer time of less than 1ms. Maybe this is normal, because the controller needs some time for internal calculations!?

    TI> Since this is an RTOS based system and all operations including the USB Communication is handled using SW state machines and event based communication/synchronization between tasks, scheduling and switching delays come into picture. This may be the reason the transfer is slower than USB spec sheet. The source code for the FW is available on TI.com product folder, you can view it for more clarity. 

    Thanks & Regards,

    Hirak.