An apparatus servs for detecting metal objects in and on articles moving relative to the apparatus. The apparatus comprises a transmitter device including a transmitter coil and configured for generating a magnetic alternating field at multiple operating frequencies using the transmitter coil, a receiver device including at least one receiver coil and configured for detecting the magnetic alternating field influenced by the moving articles and for outputting a receiver signal as a function of the detected magnetic alternating field, a filter device configured for filtering multiple partial signals out of the receiver signal, each of the partial signals being associated with one of the operating frequencies, and an analysis device configured for analyzing the partial signals. The filter device is configured for band-elimination filtering each of the partial signals which is associated with one of the operating frequencies with regard to all others of the operating frequencies.

A foreign matter detecting device includes a plurality of detection coils disposed so as to be capable of being electromagnetically coupled to each other between a transmission coil of a power transmission device and a reception coil of a power reception device between which power is transmitted in a non-contact manner, a plurality of capacitors each forming a resonance circuit together with each of the plurality of detection coils, a power supply circuit supplying AC power having a predetermined frequency to an input coil that is one of the plurality of detection coils, and a detection circuit detecting a voltage of AC power transmitted via the plurality of detection coils from an output coil that one of the plurality of detection coils and is different from the input coil, and detecting foreign matter entrapped between the transmission coil and the reception coil according to the voltage detected.

A device (10) for detecting electrically conducting objects to be measured in a ground is provided, including a housing (21), a solenoid unit (34) situated in the housing (21), which includes a transmitter coil unit (38) and a receiver coil unit (39), a control unit (36), and an evaluation unit (37). A metal sheet (35) is provided in the housing (21), the solenoid unit (34) being situated on a lower side (53) of the metal sheet (35) facing the ground during the measuring operation, and the control unit (36) being situated on an upper side (54) of the metal sheet (35) facing away from the ground during the measuring operation.

A system may receive video data generated by a camera device positioned in a physical environment. The system may receive electromagnetic (EM) response signals generated by an array of 5G antenna devices. The system may refine the EM response signals. The system may determine location information for a metallic object. The system may generate a movement trajectory of the metallic object. The system may generate a feature vector comprising an aggregation of the refined EM response signals and the movement trajectory. The system may submit the feature vector to a machine learning framework. The system may classify the metallic object as a weapon. The system may generate a virtual render comprising a graphical indication of the metallic object. The system may combine the virtual render with the video input data and display the combined virtual render and video data.

Man-portable locator systems for locating buried or otherwise inaccessible pipes, conduits, cables, wires, and/or inserted transmitters using magnetic field antenna arrays and signal processing to analyze and display information about multiple buried utilities simultaneously are disclosed.

A multi-frequency platform for metal detection is disclosed. The transmission frequencies may be selected by the user or in an autonomous fashion. Further, the weighting of the frequencies may also be selected, either by the user or in an autonomous fashion. The ability to select transmission frequencies and weighting of the frequencies provides expanded detection capability, both in terms of the types of targets being sought and the types of ground conditions being experienced.

A system may receive video data generated by a camera device positioned in a physical environment. The system may receive electromagnetic (EM) response signals generated by an array of 5G antenna devices. The system may refine the EM response signals. The system may determine location information for a metallic object. The system may generate a movement trajectory of the metallic object. The system may generate a feature vector comprising an aggregation of the refined EM response signals and the movement trajectory. The system may submit the feature vector to a machine learning framework. The system may classify the metallic object as a weapon. The system may generate a virtual render comprising a graphical indication of the metallic object. The system may combine the virtual render with the video input data and display the combined virtual render and video data.

A fluxgate detector for buried and abandoned chemical weapons is provided, comprising: a probe for sensing an external magnetic field, comprising a probe input and a probe output; an excitation module electrically connected to the probe input for inputting an excitation signal into the probe; a frequency selection module electrically connected to the probe output for isolating a second harmonic signal in an induced voltage generated by the probe; and a signal acquisition module electrically connected to the frequency selection module. The second harmonic signal in the induced voltage can be isolated by the frequency selection module, transmitted to the signal acquisition module, and converted to an intensity of the magnetic field by the signal acquisition module. The substance detected can be identified according to the intensity of the magnetic field, so that the buried ACWs can be found efficiently and accurately.

The invention relates to a dual detector with a detection head (10), comprising:a platform (11) andan induction sensor fastened to the platform (11) and comprising a transmitter coil (12) and a receiver coil (13), the transmitter coil (12) and the receiver coil (13) each forming a loop, the loop of the transmitter coil (12) overlapping the loop of the receiver coil (13) at least partially so as to form a coupling zone (14), the coupling zone (14) being elongated in a first longitudinal direction defining a first axis (X.sub.1), the handle (20) extending in a plan (P.sub.1) normal to the platform (11) and the first axis (X.sub.1) of the coupling zone (14) being transverse to this plane (X.sub.1).

The invention relates to a dual detector comprising a detection head (10) having: a platform (11), and an inductive sensor which is mounted on the platform (11) and includes a transmitter coil (12) and a separate receiver coil (13), the transmitter coil (12) and the receiver coil (13) each forming a loop, the loop of the transmitter coil (12) at least partially overlapping the loop of the receiver coil (13) so as to form a coupling region (14) which is elongate in a first longitudinal direction defining a first axis (X.sub.1), the arm (20) extending on a plane (P.sub.1) that runs perpendicularly to the platform (11), and the first axis (X.sub.1) of the coupling region (14) running transversely to said plane (P.sub.1).