Does TI have an Application design for an Electromagnetic Water Flow Meter?

Hello Robert,

  Yes, there is a Ref Design: www.ti.com/tool/tidm-3lc-meter-conv .

Note that this is a basis for a design, TI does not provide product design services, however there is a third-party design network: http://www.ti.com/devnet/docs/catalog/searchcatalog.tsp .

~Leonard 

Thanks for the quick response.
The design you sent me is for a disc/pulse counting register.
A Magmeter circuit powers copper coils which generate a magnetic filed, much like a motor except the coils are on a water pipe with flow water inside. There are 2 wet electrodes that the electronics must read which are voltages in the millivolts. The voltage produced is proportional to the velocity of the fluid. So from what I just stated there are 2 parts of this circuit, a coil driver and an analog voltage input.
?

Hi Robert,

Apologies for that oversight, and while I explore this further, let me show you also an ultrasonic version for gas or water: http://www.ti.com/tool/TIDM-ULTRASONIC-FLOW-TDC .  Just FYI, there may be some things you can use in this design.

~Leonard

I also found this App Note, seems to be what you are requesting, but it is 5 years old, I will have to pursue what happened with the development: www.ti.com/lit/an/slyt471/slyt471.pdf .

~Leonard

added:  also, this Ref Design: http://www.ti.com/tool/TIDM-LC-WATERMTR

Thanks. I understand very well how MagMeters work. The inquiry was in regard to Analog Devices design samples of which there is a circuit for a MagMeter. In reviewing the article and video it noted that the full schematic and design files were available upon request. We're interested in seeing what is available.

Robert,

 Your last post was the first time you mentioned a Reference Design; your initial inquiry was whether TI has such a design.  Your latest post specifies an Analog Devices design, of which TI would have no reference to.

If you would like to continue developing a Ref Design using TI devices, we will be happy to work with you; if, however, you wish to pursue the ADI design, please contact ADI directly.

At your service,

~Leonard   

Whoops sorry about that. I was definitely trying to see what TI has as far a designs for MagMeter electronics. I noted AI because they have an application note on their site.

Hi Robert,

  I've had to say 'oops' many times myself, I certainly understand, especially when doing research.   I read that ADI App Note, they had some detailed designs for sure.  

So, back to the TI design, I'm wondering if the WATERMTR Ref Design was close to what you might want? www.ti.com/tool/TIDM-LC-WATERMTR .  As you'll note, the flowmeter sensor is already included in this design, and even though the WATERMTR page says the board is not for sale, you can get one with the MSP430 Dev Kit: www.ti.com/tool/EVM430-FR6989 .  Fully assembled, ready to go, with all sorts of support for code and development.

Would this match your meter design requirements?  Or are your required to use a specific sensor?  If so, please send the details on that sensor (part number and manufacturer).

~Leonard 

 

Hi Robert,

  Had not heard back from you, so I wanted to check to see where you are with this design.  Did you decide to use the ADI device?  Any feedback WRT the Ref Designs I highlighted?  Let me know if there is any other info I can provide, and the status.

~Leonard 

Also, this App Note: http://www.ti.com/lit/an/slaa639/slaa639.pdf .

 

Hi Robert,

Not sure if you have had time to review the info I sent, I hope so, and to add to that, here is some additional info on Inductive Sensing using the LDC0851.  First, basics and flowmeter example: https://www.youtube.com/watch?v=oyVnMl2a9Fw .

Please advise the next step in this evaluation.

~Leonard   .

Hi Robert,
Please also refer to a similar application note using the LDC0851 to detect the rotational speed of a fan: www.ti.com/.../TIDA-00851-LDC0851
Does this sound like what you're looking for?
Thanks,
Luke