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EVM430-FR6047: Calibrating Audiowell HS0016 Ultrasonic Flow Sensor to use with USS Design Center

Wojciech Rozowski
Prodigy 30 points
Part Number: EVM430-FR6047

Hello,

Currently I am evaluating EVM430-FR6047 board and I am trying to configure the USS library to work with Audiowell ultrasonic flow sensor (DN20 connection - plastic pipe). So far, from what I understood from documentation it is not possible to calibrate the sensor while having no water flow, as the USS design center displays an error: "no signal in upstream and downstream channels" and LED1 goes red. Currently I am preparing an installation with a pump and reference flow meter to have calibration platform, but I have no clue how to properly do this in case of this sensor.

How can I obtain the meter constant for this sensor? What's it relationship with cross-sectional are of the pipe? What are the best values for numbers of signals and gaps between them? As audiowell products are pretty popular here (Ti tested the fr6047 on other audiowell product), I was wondering that maybe someone of you have the configuration header for this pipe?

I would be most grateful for any help in this matter,

Best,

Wojciech

  • 0
    TI__Mastermind 45685 points

    Hi Wojciech,

    1. the calibration platform: There are no differences when you build the calibration platform between the ultrasonic meter and mechanical meter. 

    2. volume flow rate = meter constant * dTOF/(absTODups * absTOFdns). You can get the volume flow rate from the reference meter and those time results from FR6047. Then you can calculate the meter constant.

    3. You do not need to care about the cross sectional area. Use the method from number 2

    4. You can start with 20 pulses and test. You can find more information about the configuration in this application note. 

    5. Audiowell produces different type of pipes. I donot know which particular one you are mentioning. But you can always find the right configuration by your own. 

    Best regards,

    Cash Hao

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