• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 41 subscribers
  • Views 148 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TIDA-010050: TIDA-010050

Daniel Husztik
Prodigy 10 points
Part Number: TIDA-010050

Tool/software:

We are using TIDA-010050 to create a water meter monitoring device. We incorporated TIDA-010050 design into our own design, and created a monitoring device. We are testing the TIDA part now. 

Test setup: 

Texas chip from the reference design TIDA-010050 with Sensor Controller Studio software. Water meter is equipped with custom enclosure to hold our device on the flag.

My questions are the following: 

  • How can we fine tune the system for our needs? Is REFDAC_OFFSET what we need to increase or decrease to find the optimal point for the detection? 
  • Does time affect the detection? It seems, that if we start the water meter before starting the software, it is fine, but if the software runs for 20-30sec, the calibration is different, and so are the measured values and the sensitivity. 
  • How can we add a third coil to the system? We designed our panel with three coils, but we want to include the third one. Can we do it by changing a #define or should we rewrite the code? 
  • 0
    TI__Intellectual 1845 points

    Hi Daniel,

    please, see answers below: 

    • How can we fine tune the system for our needs? Is REFDAC_OFFSET what we need to increase or decrease to find the optimal point for the detection? 

    TI: Yes, you can adjust REFDAC_OFFSET to find the optimal point for the detection.

    • Does time affect the detection? It seems, that if we start the water meter before starting the software, it is fine, but if the software runs for 20-30sec, the calibration is different, and so are the measured values and the sensitivity. 

    TI: Yes, calibration is a process that should be done in manufacturing, so you need to have the water meter start before the Software. The Calibration procedure assumes water flow is running as it is in the Initialization portion, which means it only runs once, while Event Handler A code runs periodically depending on the Event Trigger.

    So if you start the SW first, the calibration code will run on 0 or Non-flow condition and would fail.

    • How can we add a third coil to the system? We designed our panel with three coils, but we want to include the third one. Can we do it by changing a #define or should we rewrite the code? 

    TI: What is the function that the 3rd coil should have? Please, advise so we can make a proposal.

    BR

    Milen

  • 0 in reply to Milen
    Prodigy 10 points

    Dear Milen, 

    We have measured REFDAC offset vairations from 5 - 11 and it seems to have a weak interference in the sensing, however we can see the effect.  How can we extend the sensing limit range either with bigger power or selected components? Is it possible? We are on the edge of sensing, and we would like to have an extra 1-2 mm to be confident. 

    Did you try with other coils other than Gemphil? What are the results? 

    Which is better in your opinion, an external coil like gemphil or the one embedded in the eval board in 4 layer? 

    The third coil would extend reliability, range in my opinion. Or would it overcomplicate the state machine? 

    Thank you!

    BR 
    Daniel