A sensor-enabled geogrid system for and method of monitoring the health, condition, and/or status of pavement and vehicular infrastructure is disclosed. In some embodiments, the sensor-enabled geogrid system includes a sensor-enabled geogrid that further includes a geogrid holding an arrangement of one or more sensors. The sensor-enabled geogrid system further includes a communication means or network for collecting information and/or data from the sensor-enabled geogrid about the health, condition, and/or status of the pavement and vehicular infrastructure. Further, a method of using the presently disclosed sensor-enabled geogrid system for monitoring the health, condition, and/or status of pavement and vehicular infrastructure is provided.

A subsurface imaging technique using distributed sensors is introduced. Instead of monostatic transceivers employed in conventional ground penetrating radars, the proposed technique utilizes bi-static transceivers to sample the reflected signals from the ground at different positions and create a large two-dimensional aperture for high resolution subsurface imaging. The coherent processing of the samples in the proposed imaging method eliminates the need for large antenna arrays for obtaining high lateral resolution images. In addition, it eliminates the need for sampling on a grid which is a time-consuming task in imaging using ground penetration radar. Imaging results show that the method can provide high-resolution images of the buried targets using only samples of the reflected signals on a circle with the center at the transmitter location.

Deep learning to improve or gauge the performance of a surface-penetrating radar (SPR) system for localization or navigation. A vehicle may employ a terrain monitoring system including SPR for obtaining SPR signals as the vehicle travels along a route. An on-board computer including a processor and electronically stored instructions, executable by the processor, may analyze the acquired SPR images and computationally identify subsurface structures therein by using the acquired image as input to a predictor that has been computationally trained to identify subsurface structures in SPR images.

An automatic wall climbing type radar photoelectric robot system for damages of a bridge and tunnel structure, mainly including a control terminal, a wall climbing robot and a server. The wall climbing robot generates a reverse thrust by rotor systems, moves flexibly against the surface of a rough bridge and tunnel structure by adopting an omnidirectional wheel technology, and during inspection by the wall climbing robot, bridges and tunnels do not need to be closed, and the traffic is not affected. Bridges and tunnels can divide into different working regions only by arranging a plurality of UWB base stations, charging and data receiving devices on the bridge and tunnel structure by means of UWB localization, laser SLAM and IMU navigation technologies, a plurality of wall climbing robots supported to work at the same time, automatic path planning and automatic obstacle avoidance realized, and unattended regular automatic patrolling can be realized.

The present disclosure is a system comprising at least three electronically steered antennas arranged so that there is a baseline difference of a predetermined amount of wavelength between the centers of the antennas, typically configured as an obtuse or scalene triangle, where the distance between each antenna on an array is selected to provide the required accuracy and precision, the array having a timing circuit to ensure that the beam of each antenna is steered to the same azimuthal and elevation coordinates in space simultaneously. This enables the three electronically steered antennas to operate as an interferometer to determine a bearing to a target to ultimately determine the location thereof. The electronically steered antennas enable the system to be mounted on a platform in a small package that was previously difficult for traditional interferometers.

A system and a method for generating a subterranean map with ground penetrating radar are described. The system includes multiple ground penetrating radar transmitters, multiple ground penetrating radar receivers, and a controller. A first subset of the transmitters radiate a first signal at a first frequency bandwidth, a second subset of the transmitters radiate a second signal at a second frequency bandwidth different than the first frequency bandwidth, and a third subset of the transmitters radiate a third signal at a third frequency bandwidth different than the first and second frequency bandwidths. The receivers receive a first return signal at the first frequency bandwidth, a second return signal at the second frequency bandwidth, and a third return signal at the third frequency bandwidth and transmit the return signals. The controller operates the ground penetrating radar transmitters, receives the return signals, and generates a subterranean map from the return signals.

An apparatus includes an extendable wand, and a sensor head coupled to the wand. The sensor head includes a continuous wave metal detector (CWMD) and a radar. When the wand is collapsed, the wand and the sensor head collapse to fill a volume that is smaller than a volume filled by the sensor head and the wand when the wand is extended. Frequency-domain data from a sensor configured to sense a region is accessed, the frequency-domain data is transformed to generate a time-domain representation of the region, a first model is determined based on the accessed frequency-domain data, a second model is determined based on the generated time-domain representation, the second model being associated with a particular region within the sensed region, and a background model that represents a background of the region is determined based on the first model and the second model.

The present invention relates to an apparatus and method for analyzing underground geophysical properties using the principle of a ground-penetrating radar. In order to resolve problems of the ground-penetrating radar (GPR) techniques of the related art which mainly acquires an underground image using electric field reflected waves and excludes acquisition of an underground image using magnetic field reflected waves, the present invention provides a system for exploring underground geophysical properties and a method for analyzing underground geophysical properties using the same, the system including: a transmission antenna which is located in a specific spot on the ground and radiates an electromagnetic pulse signal; and a pair of reception antennae which measures an electric field signal and a magnetic field signal which are generated by the radiated signal, in which the system is configured to be able to acquire not only underground images using electric field reflected waves as in technology of the related art but also underground images using magnetic field reflected waves, thereby exploring underground geophysical properties more accurately and effectively than conventional technology.

A method for detecting a beacon signal using an above-ground tracker. The tracker comprises an antenna assembly comprising a plurality of antennas. Each antenna is oriented in a different direction. During operation, if the beacon signal is interrupted due to a local noise source, transmission of the beacon signal is stopped. The tracker then detects radiation from the local noise source and the processor determines a direction from which peak ambient noise arrives at the tracker. The beacon signal is then resumed. A processor included in the tracker excludes any signals generated by the antenna assembly that are representative of radiation that arrived at the tracker from the same direction the peak ambient noise arrived at the tracker. The tracker then detects the beacon signal using the non-excluded signals.

A method and a system for locating underground targets by using radar signals emitted from a radar transmitter coupled to a transmitter antenna, and echoed signals collected from a target by a radar receiver coupled to a transmitter antenna. The radar signals are collected via the receiver antenna which translates above ground along a closed course in cooperation with the transmitter antenna. The radar signals are processed in correlation with time and with a respective momentaneous location of the receiver antenna and the location of the transmitter antenna. The transmitter antenna is disposed on a land borne platform and the receiver antenna is disposed on the same land borne platform or on another land borne platform or on an airborne platform. The land borne platform and the airborne platform are selected as a mobile platform, a driver guided platform, a remotely guided platform, or an autonomously guided platform.