Ultrasonic flow meter design

surya

Expert 2310 points

Other Parts Discussed in Thread: EVM430-FR6043

Hi Experts,

Currently, we are looking to reference design for ultrasonic flow meter then we find this link

https://www.ti.com/tool/TIDM-02005?keyMatch=ULTRASONIC%20FLOW%20METER&tisearch=Search-EN-everything#1

kindly check this link and suggest the best way to achieve the result.

the below link prefer a 200khz transducer

this link suggest 1 Mhz transducers, kindly suggest the best transducer for my requirement

www.ti.com/.../tidues5a.pdf

My requirement is needed to design 3/4 inch to a 2-inch water flow meter with RS485

regards

surya

over 3 years ago

0 Eddie LaCost over 3 years ago

TI__Mastermind 40280 points

Hello Surya,

For water flow measurement, it is recommended to use 1MHz. The 200kHz transducers are primarily used for gas flow measurement. Audiowell has some 1MHz transducers and even provides a DN25 brass pipe, which is great for prototyping. This is the pipe we use for a lot of our internal testing.

http://www.audiowellsensor.com/product/ultrasonic-flow-sensor-with-dn25-brass-pipe

0 surya over 3 years ago in reply to Eddie LaCost

Expert 2310 points

Hello Eddie,

Thanks for the support, i am a newbie to ultrasonic based design so kindly suggest the required software for testing the evaluation board and explain how to achieve the high success rate in this design,

if you are one of the members of the testing team kindly share your mail id i will use that in the future.

Regards

Surya

0 Eddie LaCost over 3 years ago in reply to surya

TI__Mastermind 40280 points

Surya,

The software package can be found below.

https://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/USSSWLib/USSSWLibWater/latest/index_FDS.html

To get started, I recommend following the guidelines in the quick start guide below. The TI Design also provides a deeper understanding of what is required for a successful design.

https://www.ti.com/lit/ug/slau810b/slau810b.pdf

https://www.ti.com/tool/TIDM-02005

0 surya over 3 years ago in reply to Eddie LaCost

Expert 2310 points

Hi Eddie LaCost

Thanks for the reply, i have small confusions where can i connect the transducer the below document shows i need some correction(add resistor, capacitor) then the document does not show the transducer connection so kindly guide me to the correct path

regards

surya

0 Eddie LaCost over 3 years ago in reply to surya

TI__Mastermind 40280 points

Hello Surya,

You should connect the transducers as shown below in my crude drawing.

0 surya over 3 years ago in reply to Eddie LaCost

Expert 2310 points

Hi Eddie LaCost

thanks for the reply, The below link text mentioned R78 and R77 is 200 ohm but the picture shows 30R, what is the exact resistor and capacitor value kindly let me know as soon as possible

https://www.ti.com/lit/ug/tidues5a/tidues5a.pdf?ts=1616592460175&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FTIDM-02005%253FkeyMatch%253DULTRASONIC%2BFLOW%2BMETER%2526tisearch%253Dsearch-everything#page=15&zoom=100,0,494&_ticdt=MTYxNzExMTg5OXwwMTc2MzFkY2E0N2UwMDFmNzJmOTQyODhiMzg3MDMwNzEwMDMwMDY5MDA4Njh8R0ExLjIuMTg2NTY5MzY1OC4xNjA3MTU0MzE0fDA

0 Eddie LaCost over 3 years ago in reply to surya

TI__Mastermind 40280 points

The resistor value is 200 ohms. 30R is just the topside marking on the resistor using the EIA-96 system. You can see from the link below "30" indicates 200 ohms.

https://eepower.com/resistor-guide/resistor-standards-and-codes/resistor-smd-code/#

0 surya over 3 years ago in reply to Eddie LaCost

Expert 2310 points

Hi Eddie LaCost

Thanks for the answer, i will check with those components and let you know the result

0 surya over 3 years ago in reply to Eddie LaCost

Expert 2310 points

Hi Eddie LaCost

i have some new problem with EVM430-FR6043, As per your advice i have connected the transducer in J9 and i can't see the 25 pulses in my DSO, i have connect DSO probe in transducer pins, then i have shared my USS param settings, ADC capture and waveforms image for your reference kindly check and let me know the mistakes, the ADC capture and waveforms are taken with and with out water in the pipe,

.................................

0 Eddie LaCost over 3 years ago in reply to surya

TI__Mastermind 40280 points

Surya,

Sorry, I do not see the ADC capture and param settings. Can you please try attaching again?

0 surya over 3 years ago in reply to Eddie LaCost

Expert 2310 points

Hi Eddie LaCost

Thanks for the reply i have the issue on attaching the image so i just create a new thread

https://e2e.ti.com/support/microcontrollers/msp430/f/msp-low-power-microcontroller-forum/991182/evm430-fr6043-no-signal-detected-in-up-and-downstream-channel

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Ultrasonic flow meter design