Infrastructure monitoring relevant to offshore power cable inspection through the use of an Autonomous Underwater Vehicle (“AUV”) carrying a small magnetometer to localize and map underwater power cables. The method comprises using an AUV to cover a series of transects across a known cable corridor to localize subsea and buried power transmission cables in the marine environment for mapping and/or subsequent navigational aiding.

Infrastructure monitoring relevant to offshore power cable inspection through the use of an Autonomous Underwater Vehicle (“AUV”) carrying a small magnetometer to localize and map underwater power cables. The method comprises using an AUV to cover a series of transects across a known cable corridor to localize subsea and buried power transmission cables in the marine environment for mapping and/or subsequent navigational aiding.

Systems and methods for locating and/or mapping buried utilities are disclosed. In one embodiment, one or more magnetic field sensing locating devices include antenna node(s) to sense magnetic field signals emitted from a buried utility and a processing unit to receive the sensed magnetic field signals may be mounted on a vehicle. The received magnetic field signals may be processed in conjunction with sensed vehicle velocity data to determine information associated with location of the buried utility such as depth and position.

Systems and methods for locating and/or mapping buried utilities are disclosed. In one embodiment, one or more magnetic field sensing locating devices include antenna node(s) to sense magnetic field signals emitted from a buried utility and a processing unit to receive the sensed magnetic field signals may be mounted on a vehicle. The received magnetic field signals may be processed in conjunction with sensed vehicle velocity data to determine information associated with location of the buried utility such as depth and position.

An in-wall feature detection device of mutual capacitive technology comprises a housing, a detection baseplate, and at least one capacitive sensing baseplate. The detection baseplate is disposed in the housing and has a central processing module and a capacitance value conversion module and is electrically connected to at least one display module. The capacitive sensing baseplate is provided with driving modules and receiving modules, the driving and receiving modules are arranged in a crisscross manner and electrically connected to the capacitance value conversion module. The in-wall feature detection device is capable of using an electric field change between the driving and receiving modules to determine whether there is a blocking object in a wall, and further generating a corresponding light signal through the central processing module to display a shape of the blocking object. Thereby determining a position and the shape of the blocking object during construction.

A method includes compressing the dynamic range of the target detection signal so as to correspond to the desired dynamic range (60) of the audio signal (81) that is generated in order to acoustically render this detection signal to the user, so that the quietest signals are audible, the loudest signals do not cause hearing damage for the user, and that the sound volume is able to be perceived gradually for the intermediate-level signals. This avoids losing variations in the detection signal that are below the audibility threshold (63) and clipping them above a maximum hearing comfort threshold (64) in the corresponding audio signal (71) that would be generated according to the prior art.

A method includes compressing the dynamic range of the target detection signal so as to correspond to the desired dynamic range (60) of the audio signal (81) that is generated in order to acoustically render this detection signal to the user, so that the quietest signals are audible, the loudest signals do not cause hearing damage for the user, and that the sound volume is able to be perceived gradually for the intermediate-level signals. This avoids losing variations in the detection signal that are below the audibility threshold (63) and clipping them above a maximum hearing comfort threshold (64) in the corresponding audio signal (71) that would be generated according to the prior art.

The disclosure provides an Enhanced Geothermal System (EGS) magnetic nanoparticle tracer agent technique and interpretation method. The method comprises the steps of: through a magnetic nanoparticle surface modification technique and thermal stability analysis of a high-temperature high-pressure reactor, firstly accomplishing the screening of magnetic nanoparticles, so as to prepare magnetic nanoparticles having suitable diffusivity and controllable thermal stability; upon this basis, performing a core penetration test, characterizing EGS connectivity by sampling and analyzing the change in concentration of magnetic nanoparticles, and calculating a heat exchange area between rock and injected water; and meanwhile obtaining electromagnetic signal distribution of magnetic nanoparticles entering a reservoir by utilizing an electrical measurement technology, inverting reservoir connectivity by using resistivity and calculating the heat exchange area, and calibrating the resulting reservoir connectivity and heat exchange area with the connectivity.

An excavator system for locating an underground utility line, the system comprising: a signal transmitter installed on the excavator; a signal receiver installed on the excavator; a monitor; and a control unit, in communication with the receiver, wherein the control unit is adapted (a) to analyze a vicinity of the receiver from the underground utility line by an intensity of a received signal by the receiver, and (b) to display indication of the vicinity on the monitor.

An antenna arrangement. The arrangement uses four conductive loops, each within a distinct plane from the other conductive loops. The four conductive loops have a common center point. Each loop is within a dipole magnetic field, and detects a component thereof. By balancing the signals received between matched pairs of the conductive loops, the difference between the signals can be used to guide the antenna arrangement to a null point—that is—a point in the magnetic field where each pair of conductive loops is balanced. The antenna arrangement can further be used to determine the depth of the dipole field source using the magnitude of the field.