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Ocean Tech: Electromagnetic Sensing

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Patent US9915727


Issued 2018-03-13

Agile Sensing For Radar And Metal Detection

Methods, systems, and apparatus for transmitting a first set of stepped-frequency CW signals having first signal parameters, where the first signal parameters includes a first bandwidth and a first step size between signal frequencies. Detecting reflections of the first set of transmitted CW signals. Identifying an indication of a potential target in a frequency range of the reflections of the first set of transmitted CW signals from the detected reflections of the first set of transmitted CW signals. Determining second signal parameters for a second set of stepped-frequency CW signals in response to identifying the indication of the potential target. The second signal parameters include a second bandwidth and a second step size between signal frequencies, and where the second signal parameters focus on the frequency range in which the indication of the potential target is identified. Transmitting the second set of CW signals.



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3 Independent Claims

  • 1. A method for operating a continuous wave (CW) object detection device, the method comprising: transmitting a first set of stepped-frequency CW signals having first signal parameters, the first signal parameters including a first bandwidth and a first step size between signal frequencies; detecting reflections of the first set of transmitted CW signals; identifying, from the detected reflections of the first set of transmitted CW signals, an indication of a potential target in a frequency range of the reflections of the first set of transmitted CW signals; in response to identifying the indication of the potential target, determining second signal parameters for a second set of stepped-frequency CW signals, the second signal parameters including a second bandwidth and a second step size between signal frequencies, and wherein the second signal parameters focus on the frequency range in which the indication of the potential target is identified; and transmitting the second set of CW signals.

  • 10. A ground penetrating radar (GPR) device comprising: an antenna configured to transmit and receive stepped-frequency continuous wave (CW) radar signals; an electronic processor coupled to an electronic storage, the electronic storage comprising instructions, that when executed, cause the processor to perform operations comprising: transmitting a first set of stepped-frequency CW radar signals having first signal parameters, the first signal parameters including a first bandwidth and a first step size between signal frequencies; detecting reflections of the first set of transmitted CW radar signals; identifying, from the detected reflections of the first set of transmitted CW radar signals, an indication of a potential target in a frequency range of the reflections of the first set of transmitted CW radar signals; in response to identifying the indication of the potential target, determining second signal parameters for a second set of stepped-frequency CW radar signals, the second signal parameters including a second bandwidth and a second step size between signal frequencies, and wherein the second signal parameters focus on the frequency range in which the indication of the potential target is identified; and transmitting the second set of CW radar signals.

  • 17. A method for operating a continuous wave (CW) ground penetrating radar (GPR), the method comprising: transmitting a first set of stepped-frequency CW radar signals during a first frame, the first set of CW radar signals having first signal parameters including a first bandwidth and a first step size between signal frequencies; detecting reflections of the first set of transmitted CW radar signals; transmitting a second set of stepped-frequency CW radar signals radar signals during a second frame, the second set of CW radar signals having second signal parameters including a second bandwidth and a second step size between signal frequencies, wherein the second signal parameters are different from the first signal parameters; and detecting reflections of the second set of transmitted CW radar signals, and wherein the first signal parameters represent predefined parameters adapted to detecting shallow targets and the second signal parameters represent predefined parameters adapted to detecting deep targets.