The present disclosure relates to a field device, comprising: a first inductive interface, at least for transmitting and receiving data, especially for transmitting a value dependent on the measured condition; at least one second interface at least for receiving energy; and a first coupling body comprising the first, inductive interface and the second interface.

The present disclosure relates to a field device, comprising: a first inductive interface, at least for transmitting and receiving data, especially for transmitting a value dependent on the measured condition; at least one second interface at least for receiving energy; and a first coupling body comprising the first, inductive interface and the second interface.

A wireless detonator circuit includes a nitrogen-doped diamond quantum receiver. The nitrogen is embedded inside a diamond substrate. A light source illuminates the nitrogen-doped diamond. A number of layered optical filters, which are based on the principles of interferometry, and are in communication with the light source. One or more photodetector cells measure the quantity of photons emitted by the light source. One or more microwave antennae are located to permit even polarization of the diamond, thereby permitting magnetic field detection sensitivity in the picotesla range.

A wireless detonator circuit includes a nitrogen-doped diamond quantum receiver. The nitrogen is embedded inside a diamond substrate. A light source illuminates the nitrogen-doped diamond. A number of layered optical filters, which are based on the principles of interferometry, and are in communication with the light source. One or more photodetector cells measure the quantity of photons emitted by the light source. One or more microwave antennae are located to permit even polarization of the diamond, thereby permitting magnetic field detection sensitivity in the picotesla range.

A set of stators of a linear induction motor are mounted on a track. A three-phase current is provided to each of the stators, such that a traveling magnetic field (TMF) is created by the stators along the length of the track. The traveling magnetic field includes a magnetic flux corresponding to a stator excitation modulated with a message signal. A rotor includes a series of conductor plates. As the traveling magnetic field passes through the conductor plates, a current is induced in the plates by induction. Such current then generates an opposing magnetic field causing the plates and the vehicle to be propelled. Each phase may first be modulated with a message signal, before being provided to the stator. The current at the rotor is then demodulated to realize the message signal. A doppler shift due to the speed of the rotor relative to the stator is corrected.

A set of stators of a linear induction motor are mounted on a track. A three-phase current is provided to each of the stators, such that a traveling magnetic field (TMF) is created by the stators along the length of the track. The traveling magnetic field includes a magnetic flux corresponding to a stator excitation modulated with a message signal. A rotor includes a series of conductor plates. As the traveling magnetic field passes through the conductor plates, a current is induced in the plates by induction. Such current then generates an opposing magnetic field causing the plates and the vehicle to be propelled. Each phase may first be modulated with a message signal, before being provided to the stator. The current at the rotor is then demodulated to realize the message signal. A doppler shift due to the speed of the rotor relative to the stator is corrected.

Disclosed is a method for controlling a command input device. The method includes: sensing contact between a home appliance and the command input device; based on sensing the contact between the home appliance and the command input device, determining the home appliance as a target home appliance to be controlled by the command input device; and based on the determination of the home appliance as the target home appliance to be controlled by the command input device, activating a remote controller provided by the command input device and configured to control the target home appliance.

Disclosed is a method for controlling a command input device. The method includes: sensing contact between a home appliance and the command input device; based on sensing the contact between the home appliance and the command input device, determining the home appliance as a target home appliance to be controlled by the command input device; and based on the determination of the home appliance as the target home appliance to be controlled by the command input device, activating a remote controller provided by the command input device and configured to control the target home appliance.

A method for signal communication between a well drilling instrument and the Earths surface includes generating an electromagnetic field in an instrument disposed in drill string used to drill a wellbore. The electromagnetic field includes encoded measurements from at least one sensor associated with the instrument. A signal corresponding to an amplitude and/or phase of the electromagnetic field is measured between the drill string and a surface electrode when the drill string is substantially electrically isolated from a well casing. A signal corresponding to the amplitude and/or phase is measured between the casing and a surface electrode when the casing and the drill string are in electrical contact with each other.

A hearing device includes: a carrier board; a multi-chip assembly including a magnetic induction control chip and a signal processor; a magnetic induction coil at the carrier board; a hearing device housing having a first end and a second end, the second end being opposite from the first end; and a battery, wherein the battery is provided closer to the second end of the hearing device housing than to the first end of the hearing device housing; wherein the multi-chip assembly and the magnetic induction coil are accommodated in the hearing device housing, and are between the battery and the first end of the hearing device housing.