TDC1000-TDC7200EVM: tdc1000 TDC7200 EVM - level measurement guide

ulas dikme

Part Number: TDC1000-TDC7200EVM

Hello TI family,

It is really excitating to buy sth from you and develop it for future applications.

Actually, I bought a TDC1000 development board a few days ago, but I do not have any reference box to measure the level so I do not where to start. I just want to measure now water leve in the plastic cup, then I will try to understand all parameters in the design. I set up your gui in win 7, but it shows everytime 2.7 cm sth like that.

Simply I can not measure anything.

The questions:

1- Where can I find a good guide without your reference plastic box ?

2- Do I have to glue the piezo sensor to the bottom of the plastic cup ?

over 8 years ago

0 Scott Cummins over 8 years ago

TI__Mastermind 31655 points

Hello,

1. Please reference this application note describing how to measure tank level using the TDC1000-TDC7200EVM www.ti.com/.../snaa270.pdf

2. Yes, you must glue the transducer to the container to provide a good acoustic coupling. This application note describes the best process to mount a transducer: www.ti.com/.../snaa266a.pdf

Regards

0 ulas dikme over 8 years ago in reply to Scott Cummins

Prodigy 70 points

Thanks for reply,

I follow your instructions but it does not work.

In the photo you can see my test setup.

Before the glue sensor read every time 2.70 cm, but there is no tank ?

Now it does not read anything. ıt is about configuration ? configuration is default.

Can you help me ? I want to read water level in the cup to study and understand the tdc1000 parameters .

0 ulas dikme over 8 years ago in reply to ulas dikme

Prodigy 70 points

I also use VM to run the GUI in win7. I think the problem is about configuration parameters. I changed some parameters then some reading is possible but it is not true .

I need some configuration for my setup but I can not find the information.

0 ulas dikme over 8 years ago in reply to Scott Cummins

Prodigy 70 points

I can not find any useful information about why my reading are not stable . When 3 db power I choose from the GUI I can not read any measurement but choosing 21 db , it gives me some reading with really noise and it is wrong basicly.

How can I get good measurement. I follow the instructions.

thanks...

0 ulas dikme over 8 years ago in reply to Scott Cummins

Prodigy 70 points

Is the transducer used with metalic box like mine ? or it is only for plastic material ? Which transducer is suitable for metalic metarials or where can I find the information sth like look up table to choose the right transducer..

thanks : ))

0 Scott Cummins over 8 years ago in reply to ulas dikme

TI__Mastermind 31655 points

Hello,

Please try the settings that are detailed in this post that is linked at the top of the Ultrasonic sensing forum: e2e.ti.com/.../467713

Regards,

0 ulas dikme over 8 years ago in reply to Scott Cummins

Prodigy 70 points

Thanks for your answer.

I cofigure like in the link, but reading are noisy. Real level is for example 4.3 cm it read between 7 to 2.7 cm . It is not stable.

What is the possible fault? What I miss ?

0 Vincent Lin over 8 years ago in reply to ulas dikme

Prodigy 70 points

I face the same problem. What can I do? Have you sort it out?

If you did, please advice. Thanks.

0 ulas dikme over 8 years ago in reply to Vincent Lin

Prodigy 70 points

If you use the development board, it is not easy to meausre the level of metalic box. Use plastic one. If you wan to measure the metalic box , excite the transducer much more than 5V.

Also glue is important. Be careful and be patient when you glue the transducer. There must not be any blank surface between the transducer surface and the bottom surface of the tank or box.

I can read plastic box of the level. I did not try the metalic one . Use simple plastic cup to understand what is going on.

Also under the 3 cm readings are not good, you need to change the configuration. I mean the configuration is not same for 3 cm above and 3 cm below.

Sensors

Sensors forum

TDC1000-TDC7200EVM: tdc1000 TDC7200 EVM - level measurement guide