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detection of along shore gravel trajectories

Haggai Eyal
Prodigy 20 points
Other Parts Discussed in Thread: RF-RANGE-ESTIMATOR

I’m looking for a technology to trek and detect the underwater movement of gravel (a stone) in real time. These gravels (stones) move along Dead Sea shoreline by longshore currents triggered by the wind.
The movement occur inside the hypersaline lake shallow water of the Dead Sea (1240 kg\m3 water density) at depth of 0-1.5m in a very energetic environment during storms.
For example if exists a small chip that can be injected into a stone and record its underwater rout (relative location) and be picked after a period of time or transmit location data to an antenna inside or outside the water (in a range of few meters) it can be very helpful for my research.

thank you very much

haggai

  • 0
    TI__Mastermind 49692 points

    Hello Haggai,

    While I don't think we have a single chip that can do everything you need, we offer many different types of devices that when put together may help you accomplish your goal. For an underwater application, you'll need to be able to track the object using GPS, Inertial Navigation System (INS), hydrophone array, etc. and most likely communicate with it.

    We provide many different microcontrollers and processors that could be used as a host to these types of sensors. While I'm not an RF expert, I believe that water really attenuates wireless spectrums including Wi-Fi and perhaps BLE. With this in mind, I'm not sure if our sub-1 GHz and other low frequency devices could be used for communicating with the object in the water or not. Feel free to check out our SimpleLink portfolio.

    I hope this helps.

    Regards,

    James

    MSP Customer Applications

  • 0 in reply to James Evans
    Prodigy 20 points
    Hello James,
    Im not sure that I understand what you recommend me to do.. Who can give more details regarding the attenuation of the water? and how it effects the distance ranges that such systems can work.. is there somebody I can talk to that can help with finding the specific devices Im looking for?
    Thank you a lot and I very appreciate your answer
    All the best
    Haggai
  • 0 in reply to Haggai Eyal
    TI__Mastermind 49692 points

    Hello Haggai,

    Other than my earlier recommendations, I would recommend that you do more research about underwater communication methods, such as acoustic, light, and RF. Here are a few interesting articles that I found after a quick online search. IEEE may also be a good place to search too.

    Underwater Wireless Sensor Communications in the 2.4 GHz ISM Frequency Band

    THE MANY CHALLENGES OF UNDERWATER COMMUNICATION

    Unfortunately, most of our wireless products are intended to be used over-the-air rather than underwater. For example, we offer the TI RF Range Estimator, which interestingly allows water to be selected as the surface (not medium) for the range estimations.

    TI RF Range Estimator (RF-RANGE-ESTIMATOR)

    Achieving Optimum Radio Range

    Excel sheet to estimate range for Indoor and Outdoor

    Thus, most of our expertise is focused on over-the-air communication, but there may be others in our community who specialize in underwater communication and who could chime in.

    As I mentioned earlier, we may have microcontrollers or processors that could be used as hosts for some type of underwater transceiver. I'm sorry that I can't be more help here, but I wish you the best in your development.

    Regards,

    James

    MSP Customer Applications