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ULC1001: ULC on a flat window

DBakker
Prodigy 10 points
Part Number: ULC1001
Other Parts Discussed in Thread: DRV2901,

I am considering ULC for an optical device with a flat window of approx. 100x50mm. This window has multiple optical devices behind it, and a support bracket in the area where there are no optical devices. Because of this bracket it can be relatively thin. There is also plenty of area available for placing one or multiple piezo transducers. However, it is mechanically still a very different situation than the round window lens from the ULC design examples that are currently released. Does TI have some information and guidelines on implementing ULC on a flat window like this?

Thank you in advance.

  • 0
    TI__Intellectual 2030 points

    Hello, 

    Let me get our mechanical engineer to see if he can help!

    -Jeff

  • 0
    TI__Prodigy 160 points

    Hi DBakker, 

    We did receive a few requests from customers on rectangle windows. Currently we do not have existing design guideline on it unfortunately, but it is in our radar. We are making plans and prioritize different size/shapes. I would forecast that we will have updates on rectangle shape in 1-2 years.  

    Hailong

  • 0 in reply to Hailong Chen
    Prodigy 10 points

    That's a long time, I won't be able to wait for that. Another option is that I do some research myself. Could you provide some first guesses and estimates of what might be necesssary to make such a situation work? For example, what kind of transducer set up would you try as a first guess, piezo(s) at the edge of the glass or in the middle perhaps? In case of multiple transducers, what kind of electronic architecture would you recommend, multiple piezos on a single DRV2901?

  • 0 in reply to DBakker
    TI__Prodigy 160 points

    Do you have finite element analysis (FEA) simulation tools such as COMSOL? It will help you understand how your system vibrate. I would start from one piezo and then multi piezos at the edge of the glass. You might also consider using piezo sheet/plate instead of cylinder piezo. The most important is using simulation tools to try different structures and vividly see your system at the same time. Regarding electronic architecture, multiple piezos on a single DRV device is achievable if the multiple piezos need same driving signal.   

  • 0 in reply to Hailong Chen
    Prodigy 10 points

    FEA simulations would indeed be possible for me. I suppose this could also be of interest to other people investigating the application of ULC on less common lens constructions: could you provide some pointers on what the design goals are for an effective mechanical design for ULC? Optimising vibration amplitude of the glass surface for a given power or something like that? Perhaps some advise on recommended boundary conditions or other ULC-specific simulation advise? If TI could share an example simulation report for a ULC lens design, that could be very helpful as a starting point

  • 0 in reply to DBakker
    TI__Expert 8701 points

    Hi,

    You can request access to TI's Secure Resources folder by going to the ULC1001 product page or the EVM page and requesting access. This is where we will provide mechanical design documents for our existing systems. These documents outline our current designs with all details on measurements. TI's designs and simulations are considered internal IP, and we cannot share information like this without an NDA in place. We can discuss further over email.