The invention relates to an RFID-type transponder for a contactless identification and wireless communication system, intended to affixed to a buried polymer pipe, comprising: an RFID chip; an electronic switching circuit coupled to the RFID chip; a first antenna coupled to the switching circuit, said first antenna having a surface covering a first portion of the external surface of the polymer pipe; and a second antenna coupled to the switching circuit, said second antenna having a surface covering a second portion of the external surface of the polymer pipe, said second portion being different from the first portion. According to the invention, the switching circuit is configured to: couple the first antenna to the RFID chip when the voltage captured at die edge of the first antenna, and corresponding to the magnetic field, by an RFID emitter is greater than the voltage captured at the edge of the second antenna; and couple the second antenna to the RFID chip when the voltage captured at the edge of the second antenna by an RFID emitter is greater than the voltage captured at the edge of the first antenna.

The invention relates to an RFID-type transponder for a contactless identification and wireless communication system, intended to affixed to a buried polymer pipe, comprising: an RFID chip; an electronic switching circuit coupled to the RFID chip; a first antenna coupled to the switching circuit, said first antenna having a surface covering a first portion of the external surface of the polymer pipe; and a second antenna coupled to the switching circuit, said second antenna having a surface covering a second portion of the external surface of the polymer pipe, said second portion being different from the first portion. According to the invention, the switching circuit is configured to: couple the first antenna to the RFID chip when the voltage captured at die edge of the first antenna, and corresponding to the magnetic field, by an RFID emitter is greater than the voltage captured at the edge of the second antenna; and couple the second antenna to the RFID chip when the voltage captured at the edge of the second antenna by an RFID emitter is greater than the voltage captured at the edge of the first antenna.

A marker device embodiment may include separate concentrically-oriented receive and transmit antenna elements coupled to an ASIC which includes electronics to receive an input signal at a first frequency from a transmitter, convert the input signal to a power supply to power the electronic circuit, generate, in response to the input signal, an output signal at a second frequency different from the first frequency, and provide the output signal, via the transmit antenna element, to an above-ground receiver for assistance in determining the location of a buried utility.

A marker device embodiment may include separate concentrically-oriented receive and transmit antenna elements coupled to an ASIC which includes electronics to receive an input signal at a first frequency from a transmitter, convert the input signal to a power supply to power the electronic circuit, generate, in response to the input signal, an output signal at a second frequency different from the first frequency, and provide the output signal, via the transmit antenna element, to an above-ground receiver for assistance in determining the location of a buried utility.

An apparatus comprises a magnetic target for generating a magnetic field that is uniform and concentric about a central axis of the target; an array of three-axis digital magnetic compasses for sensing the magnetic field; and a processor for finding intersection points of vectors from the compasses to the target. The vectors lie in a global X-Y plane that is normal to the central axis. Each vector indicates a direction of sensed magnetic field from one of the compasses to the magnetic target.

An apparatus comprises a magnetic target for generating a magnetic field that is uniform and concentric about a central axis of the target; an array of three-axis digital magnetic compasses for sensing the magnetic field; and a processor for finding intersection points of vectors from the compasses to the target. The vectors lie in a global X-Y plane that is normal to the central axis. Each vector indicates a direction of sensed magnetic field from one of the compasses to the magnetic target.

Present invention comprise sensor label, printer assembly, method and system for production and initializing the sensor label, and a method for monitoring the temperature chain of a transport session with goods under transport and/or storage.

An augmented reality (AR) object positioning system receives a target coordinate for a location of interest within a physical environment. The AR object positioning system then determines an AR device coordinate of an AR device within the physical environment and orientation information of the AR device at the AR device coordinate. The AR object positioning system calculates a plurality of image frame coordinates of an image frame based on the AR device coordinate and the orientation information when the image frame was captured. The AR object positioning system, in response to an image frame coordinate of the plurality of image frame coordinates corresponding with the target coordinate, renders on a display of the AR device, first annotation content relative to the image frame coordinate according to rendering instructions for the first annotation content.

A flag type warning marker consisting of two parts—a flag supported by a uniquely shaped flagstaff to be inserted into the ground directly above underground utility lines to mark their location. By the unique shape of the flagstaff, the marker also indicates the direction or path of the utility lines. The flagstaff includes one C-shaped offset segment projecting outwardly from the vertical flagstaff in the direction of the associated utility lines path. In another embodiment of the invention, there are two separate offset segments oriented at ninety degrees to one another to designate a ninety degree corner of the utility lines below. Another offset segment of the flagstaff near the lower end of the staff can be added and be partially embedded into the ground to anchor the marker in order to prevent it from rotation after installation, thus maintaining the integrity of the directional indication.

A flag type warning marker consisting of two parts—a flag supported by a uniquely shaped flagstaff to be inserted into the ground directly above underground utility lines to mark their location. By the unique shape of the flagstaff, the marker also indicates the direction or path of the utility lines. The flagstaff includes one C-shaped offset segment projecting outwardly from the vertical flagstaff in the direction of the associated utility lines path. In another embodiment of the invention, there are two separate offset segments oriented at ninety degrees to one another to designate a ninety degree corner of the utility lines below. Another offset segment of the flagstaff near the lower end of the staff can be added and be partially embedded into the ground to anchor the marker in order to prevent it from rotation after installation, thus maintaining the integrity of the directional indication.