BOOSTXL-TUSS4470: Bistatic configuration

pang lien khai

Prodigy 30 points

Part Number: BOOSTXL-TUSS4470
Other Parts Discussed in Thread: TUSS4470

Can I check how do I set the TUSS4470 for measurement using bistatic configuration?

over 3 years ago

0 Isaac Lara over 3 years ago

TI__Mastermind 19640 points

Hello Pang,

Sorry for the delay I will have a response for you by Monday.

Best,

Isaac

0 pang lien khai over 3 years ago in reply to Isaac Lara

Prodigy 30 points

Thanks Isaac

Per ultrasonic FAQ, seem like it can be done but the manual does not write how can I set it up and run it for the time of flight measurement for bi-static configuration

e2e.ti.com/.../faq-ultrasonic-sensors

0 Isaac Lara over 3 years ago in reply to pang lien khai

TI__Mastermind 19640 points

Hey Pang,

Yeah I don't seem to find any sort of documentation and the datasheet does not seem to indicate any settings needed for bi-static measurements. The only thing I found that could indicate there might be a mode would be this under section 3.5.2.5.3 External Sync and Trigger of the data sheet. I can look into it further but it might take me towards the end of the week since I am tied up at the moment. I hope this is okay.

Best,

Isaac

0 pang lien khai over 3 years ago in reply to Isaac Lara

Prodigy 30 points

Thanks. Can I check where do i hook up the 2nd transducer that is acted as the receiver on the development board

0 Isaac Lara over 3 years ago in reply to pang lien khai

TI__Mastermind 19640 points

Hello Pang,

It seems like if there is a way to setup bi-static measurements it might require the use of another EVM via the sync and trigger but I would have to confirm this for you. Do you have another EVM to test this out on or just the one?

Best,

Isaac

0 pang lien khai over 3 years ago in reply to Isaac Lara

Prodigy 30 points

Hi Issac

Thanks. I only have this EVM for now.

i am thinking will it works if i connect my receiver transducer to INP and INN per below to do the receiving of signal while waiting for you to check out the actual connection procedure

0 Isaac Lara over 3 years ago in reply to pang lien khai

TI__Mastermind 19640 points

Hello Pang,

Looks like J3 is used for bi-static configuration as seen in the schematic below.

In order to make sure that you are only receiving burst on only the RX transducer on J3 you will have to remove the 0 ohm resistor on R12 (circled at the bottom) which connects the transmitting transducer back into the input for monostatic configuration.

Best,

Isaac

0 pang lien khai over 3 years ago in reply to Isaac Lara

Prodigy 30 points

Thanks Isssc

Do i need to make any changes to the setting in the GUI?

+1 Isaac Lara over 3 years ago in reply to pang lien khai

TI__Mastermind 19640 points

Hey Pang,

No worries glad to help out. It looks like no changes need to be made in the GUI in order for bi-static measurements to be enabled. The transducer will connect directly to the analog front end of the device which if the resistor mentioned above wad removed then it will be the only device in the signal path.

I am not quite certain about the way you are taking your measurements, if you are still using a round trip ToF method then the GUI will give you accurate distance measurements, but if you are using one transducer on one end and another transducer on the other end then this is not a round trip ToF calculation so the distance will be incorrect because the GUI calculates for round trip ToF. The ToF measurement will be correct, but if you want to calculate distance then you may use the distance provided by the GUI divided by 2. Note that this is only if you are using a detection method where the receiver is on the opposite side of the transmitter.

Best,

Isaac

+1 pang lien khai over 2 years ago in reply to Isaac Lara

Prodigy 30 points

Thanks a lot. I will create another post if I have more question

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BOOSTXL-TUSS4470: Bistatic configuration