38 results about "Power over fiber" patented technology

A method and apparatus for transmitting and receiving power over optical fiber is disclosed. In particular, a power over fiber system in which an optical network transmits electrical power via an optical signal and is also transmits data within the optical network as well. The optical signals include a high frequency data portion that includes the data to be transmitted, and either a constant or low frequency power signal portion. The optical signal is received and converted into an electrical signal by a photodetector / photodiode that is electrically filtered to separate the data signal from the power signal. The data signal is then processed using known techniques. The power signal can be conditioned and / or regulated, if necessary, and provided either directly to a terminal piece of equipment to provide all the required power thereto, or may be combined with locally provided power to contribute at least a portion of the power required by the equipment. The terminal piece of equipment may be a wireless access point.

The invention relates to an on-line monitoring system for data collection of electric arresters based on GPS (Global Positioning System) synchronization. The on-line monitoring system comprises a back-stage management server, wherein the back-stage management server is connected to a station control central unit; terminal devices are connected to the station control central unit; synchronous data of running parameters of the electric arresters which are in a network are collected by the terminal devices; power is supplied to the terminal devices by remote optical fibers of the arrester station control central unit; optical fiber communication is utilized to transmit the data; the station control central unit has a GPS time service function and is used for supplying synchronously collected pulses to the terminal devices distributed in different places, thereby realizing synchronous data collection; and inspection personnel can conveniently perform field check and state display on the running parameters of a plurality of local arresters by virtue of a man-machine interface of the station control central unit. Meanwhile, the collected data can be transmitted to the back-stage management server through the optical fibers or in a backup GPRS (General Packet Radio Service) wireless manner; therefore, the system has the characteristics of reducing the working strength of maintenance personnel and finding out potential hidden dangers of the arresters in time and is high in safety.

The invention belongs to the technical field of combination of wire cables and electric power and provides a PFTTH (power fiber to the home) cable. The PFTTH cable is characterized by comprising a first insulated conducting wire, a second insulated conducting wire, a butterfly optical cable, a first outer protection layer, a second outer protection layer, a third outer protection layer and a cavity, wherein the first outer protection layer covers the first insulated conducting wire; the second outer protection layer covers the second insulated conducting wire; the third outer protection layercovers the butterfly optical cable; the cavity is arranged in the third outer protection layer and can accommodate the butterfly optical cable; the first insulated conducting wire and the second insulated conducting wire are respectively arranged at the two sides of the butterfly optical cable; the first outer protection layer, the second outer protection layer and the third outer protection layer are in a one-body shape; and on any plane which is vertical to the axis of a first conductor, the outer edge of the third protection layer protrudes towards the cavity. According to the invention, the problems in the prior art that the cable is difficult to lay and tear out and the fiber density is low can be solved; and the PFTTH cable provided by the invention has the beneficial effects of stable heating performance, modularization, easiness for laying, producing, laying and constructing and the like.

The invention discloses an optically-driven IGBT (Insulated Gate Bipolar Translator) device based on single optical fiber power supply and pulse signal transmission. The optically-driven IGBT device comprises an optical signal generator for generating an optical signal, an optical controller for converting and controlling the optical signal, and an optical fiber medium for transmitting the optical signal, wherein the light emitting end of the optical signal generator is connected with the light receiving end of the optical controller through the optical fiber medium; and the signal output end of the optical controller is taken as a driving output end for driving an external conversion system. The on-off of an IGBT is controlled through the optical signal, and the form of a floating potential is adopted, so that a control signal is protected from being influenced by the emitter voltage of a controlled power device. The optically-driven IGBT device has the advantages of simple structure, high electric insulating performance, high interference resistance, convenience in controlling, easiness for high-power control, and the like. The optically-driven IGBT device is suitable for a high-power conversion system for use in traction drive of electric cars such as motor cars and high-speed rails as well as speed regulation of switching power supplies, electronic switches and various motors, and the like.

An electromagnetic energy transmitting device includes a processing unit, a light-detecting sensor coupled to the processing unit, and a high-flux electromagnetic energy transmitter. An electromagnetic energy receiver arranged to convert received light into electricity. A first fiber-based conduit couples the high-flux electromagnetic energy transmitter to the electromagnetic energy receiver. The first fiber-based conduit is arranged to pass high-flux light from the high-flux electromagnetic energy transmitter to the electromagnetic energy receiver. A second fiber-based conduit couples the electromagnetic energy receiver to the light-detecting sensor. The second fiber-based conduit is arranged to pass at least some light from the electromagnetic energy receiver to the light-detecting sensor, wherein the processing unit is arranged to control an output of the high-flux light from the high-flux source based on a control signal from the light-detecting sensor.

The present invention is relative to a multimode optical fiber (99) for continuous transmission of electromagnetic radiation at high power, said fiber defining a fiber axis and comprising a core (110)and a cladding (120) surrounding the core, and wherein the multimode optical fiber is a multimode graded-index fiber, the refraction index profile in the fiber essentially following the formula (1) where formula (A), Nr is the distance from the fiber axis, N(r) is the nominal refractive index as a function of distance from the fiber axis, N1 is the nominal refractive index on the axis of the fiber, N2 is the refractive index of the cladding, N a is the core radius, and Ng is a parameter that defines the shape of the profile, where the core diameter 2a is comprised between 90 Mum and 190 Mum,the parameter g is comprised between 1.2 and 1.8, and the numerical aperture (NA) of the fiber, where formula (B), is comprised between 0.2 and 0.3.

A computer storage system protected from electromagnetic pulses is described. The storage system utilizes either a hard drive or a solid state drive to hold the data. The device uses fiber optics to transfer data and is powered by either a Power over Fiber system or by a switched battery system. The device protects against radiation, magnetic pulses, and electronic pulses using an enclosure that incorporates a faraday cage, a radiation shield, and / or a magnetic shield.

The invention discloses a current induction type power supply of a power grid monitoring device, belongs to the field of power grids and solves the problem that the conventional power supply of the power grid monitoring device exists in modes of mains supply conversion, solar energy, storage battery and optical fiber power supply. The current induction type power supply of the power grid monitoring device comprises a current transformer, a rectification circuit, a voltage stabilizing circuit, a step-down circuit and n load controllers, wherein n is a natural number which is greater than or equal to 1; the current transformer acquires a secondary current signal by inducing current in a power grid bus; a secondary side of the current transformer is connected with the rectification circuit; an output end of the rectification circuit is connected in parallel with the load controllers; an output end of each load controller is connected with an input end of the voltage stabilizing circuit; an output end of the voltage stabilizing circuit is connected with an input end of the step-down circuit; and an output end of the step-down circuit is connected with a load. The device provided by the invention is used for providing power for the power grid monitoring device.

A laser fiber power supply working method based on power adaptive feedback adopts a laser fiber power supply system, the laser fiber power supply system comprises a laser, a super capacitor energy storage module, a photovoltaic module and a first microcontroller, and the photovoltaic module is suitable for supplying power to a sensing node. When the laser optical fiber power supply system is in a sensing node power supply mode, the first microcontroller executes loop feedback control on the incident laser power transmitted to the photovoltaic module by the laser based on the output power of the photovoltaic module, the power requirement of the sensing node and the working voltage of the super capacitor energy storage module, and the charging process of the photovoltaic module to the super-capacitor energy storage module and the discharging process of the super-capacitor energy storage module to the sensing node are controlled. The laser fiber power supply working method based on power adaptive feedback can improve the long-term reliability of the laser fiber power supply system.

The invention relates to a network of switched optical fiber for airplane seats. The network connects the screens of the seats to each other and to a server via an optical fiber. The network includes optical switches of the MEMS type including mirrors, said switches being provided perpendicular to each seat. Each switch delivers the light beam in the optical fiber to the screen with which it is connected and re-amplifies it in the optical fiber when it is powered, while the switch directly delivers the light beam to the following seat when it is not powered.

A computer storage system protected from electromagnetic pulses is described. The storage system utilizes either a hard drive or a solid state drive to hold the data. The device uses fiber optics to transfer data and is powered by either a Power over Fiber system or by a switched battery system. The device protects against radiation, magnetic pulses, and electronic pulses using an enclosure that incorporates a faraday cage, a radiation shield, and / or a magnetic shield.

An electromagnetic energy transmitting device includes a processing unit, a light-detecting sensor coupled to the processing unit, and a high-flux electromagnetic energy transmitter. An electromagnetic energy receiver arranged to convert received light into electricity. A first fiber-based conduit couples the high-flux electromagnetic energy transmitter to the electromagnetic energy receiver. The first fiber-based conduit is arranged to pass high-flux light from the high-flux electromagnetic energy transmitter to the electromagnetic energy receiver. A second fiber-based conduit couples the electromagnetic energy receiver to the light-detecting sensor. The second fiber-based conduit is arranged to pass at least some light from the electromagnetic energy receiver to the light-detecting sensor, wherein the processing unit is arranged to control an output of the high-flux light from the high-flux source based on a control signal from the light-detecting sensor.

The invention provides an integrating sphere-based high-power fiber grating scattering loss measurement system. The system comprises a test light source, an optical fiber grating to be tested, an integrating sphere detector, a power display and a computer; the output pigtail of the test light source is connected with an optical fiber which is inscribed with the optical fiber grating to be tested;the integrating sphere detector includes a hollow integrating sphere body; the integrating sphere body is provided with a detector port, a south pole port and a north pole port; the detector port is used for fixedly mounting a detector sensing head; the south port and the north pole port are used for allowing the optical fiber which is inscribed with the optical fiber grating to be tested to passand fixing the optical fiber so as to ensure that the optical fiber grating to be tested can be located at the center of the integrating sphere body; the detector sensing head is connected with the power display so that scattered power at the detector sensing head can be obtained; the power display is connected with the computer; and the computer calculates the total scattered power of the fiber grating to be tested according to an integrating sphere measurement principle. According to the system, scattered power under different wavelengths and power conditions is measured, so that the scattering loss characteristics of the fiber grating can be obtained.

A miniature, low-power, optical sensing device that operates in the harsh electromagnetic environment of a magnetic resonance imaging system is provided. The device includes a means of transferring imaging data obtained with the optical sensor out of this harsh electromagnetic environment without requiring a galvanic connection. It is practical to power the device using a small battery that is compatible with the harsh environment. In other embodiments, the device is powered using 'power over fiber' or by taking power by power harvesting directly from the harsh electromagnetic environment. One embodiment is to directly integrate the device into a magnetic resonance imaging (MRI) head coil, using a wired connection to the head coil to provide electrical power. Here the wired connection does not penetrate the Faraday cage of the MRI system or cross into the bore of the MRI system from outside the bore.

An optical connector of a power over fiber system includes a shutter. The shutter opens in conjunction with a connection operation to enable the connection and closes in conjunction with a disconnection operation to block feed light from exiting. A light receiving surface of the shutter is made of a wavelength conversion material. The light receiving surface receives the feed light when the shutter is closed. The optical connector is disposed at a feed-light output end in the power over fiber system.

The invention discloses an optically-driven IGBT (Insulated Gate Bipolar Translator) device based on single optical fiber power supply and pulse signal transmission. The optically-driven IGBT device comprises an optical signal generator for generating an optical signal, an optical controller for converting and controlling the optical signal, and an optical fiber medium for transmitting the optical signal, wherein the light emitting end of the optical signal generator is connected with the light receiving end of the optical controller through the optical fiber medium; and the signal output end of the optical controller is taken as a driving output end for driving an external conversion system. The on-off of an IGBT is controlled through the optical signal, and the form of a floating potential is adopted, so that a control signal is protected from being influenced by the emitter voltage of a controlled power device. The optically-driven IGBT device has the advantages of simple structure, high electric insulating performance, high interference resistance, convenience in controlling, easiness for high-power control, and the like. The optically-driven IGBT device is suitable for a high-power conversion system for use in traction drive of electric cars such as motor cars and high-speed rails as well as speed regulation of switching power supplies, electronic switches and various motors, and the like.

A power over fiber system includes a power sourcing equipment, a powered device, an optical fiber cable and an openable / closeable or attachable / detachable lid member. The power sourcing equipment includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The powered device includes a photoelectric conversion element that converts the feed light output by the power sourcing equipment into electric power. The optical fiber cable transmits the feed light from the power sourcing equipment to the powered device. The feed light is invisible light. The lid member covers an outgoing portion from which the feed light goes out. At least part of a light receiving portion of the lid member, the light receiving portion receiving the feed light, is made of a wavelength conversion material that converts a wavelength of the feed light into a wavelength of visible light.

Provided is a photodiode array that is capable of outputting an electric signal with a large electric power and an optical microwave transmission system receiver that supplies an electric power with the aid of an optical fiber and does not require the electric power line from the external. An input modulation light is branched and input to a plurality of photodiode elements (1), electric output terminals (5) of the plurality of photodiode elements (1) are connected in parallel to each other, and a combined electric output is extracted. The electric output terminal (5) of the photodiode array configured as described above is connected to an antenna (7) without an intermediation of an amplifier circuit.

The invention relates to a wireless sensor network data aggregation system based on optical fiber power supply. The wireless sensor network data aggregation system comprises a rear-end monitoring unit and a wireless sensor aggregation node. The rear-end monitoring unit provides power supply for the wireless sensor sink node through an optical fiber, and the wireless sensor sink node receives monitoring information collected by the sensor nodes in the network where the wireless sensor sink node is located and transmits the information back to the rear-end monitoring unit through the optical fiber. According to the invention, an energy and data transmission channel is provided for the sink node of the wireless sensor network through one optical fiber, the system has the advantages of long transmission distance, flexible deployment, strong anti-interference capability and the like, and the application scene of the wireless sensor network is expanded.

The invention discloses a monitoring system and method for a photovoltaic power converter in an optical fiber power supply system, which belongs to the technical field of optical fiber power supply, and includes a control unit, a circuit parameter adjustment unit and a voltage acquisition unit; the control unit adjusts and acquires photovoltaic power through the circuit parameter adjustment unit The output current of the power converter, the output voltage of the photovoltaic power converter is obtained through the voltage acquisition unit, and then the current maximum output power of the photovoltaic power converter is obtained, and the actual input optical power of the photovoltaic power converter is converted to determine the light energy transmission chain Whether there is a fault in the road, so as to ensure the normal and stable operation of the system. The control unit judges the relationship between the rated current of the post-stage equipment and the current that the photovoltaic power converter can provide, and can predict whether the post-stage equipment will overload the photovoltaic power converter. If so, the photovoltaic power converter is not allowed to supply power to the post-stage equipment. Avoid greatly shortened service life or permanent damage of photovoltaic power converter.

A powered device includes a photoelectric conversion element, a thermoelectric conversion element and a first power line. The photoelectric conversion element receives and converts feed light into electric power. The thermoelectric conversion element is disposed such that heat can be conducted thereto from the photoelectric conversion element. The first power line transmits, to a load, electric power obtained by conversion by the thermoelectric conversion element.

A power over fiber system transmits feed light and signal light through an optical fiber. The optical fiber includes a first transmission path and a second transmission path. The first transmission path is a core or a cladding, and the second transmission path is a cladding located on a periphery of the first transmission path. The feed light propagates through the first transmission path, and the signal light propagates through the second transmission path.

The invention belongs to the technical field of combination of electric energy metering with network communication, and relates to an electric energy meter for PFTTX (power fiber-to-the-x, x = H for home, P for premises, C for curb and N for node or neighborhood), which comprises a measurement mechanism, a shell, a display unit and a wiring unit, wherein wiring terminals are arranged on the wiring unit, and the measurement mechanism is positioned in the shell. The electric energy meter for PFTTX is characterized in that: a fiber input interface and a fiber output interface are arranged on the left side or right side or lower side of the shell, and an optical signal transceiving device is also arranged in the shell; the fiber input interface is connected with an input end of the optical signal transceiving device, and the fiber output interface is connected with an output end of the optical signal transceiving device; the fiber input interface can be externally connected with a fiber, and the fiber output interface can be externally connected with the fiber; grooves for fixing are arranged on both the fiber input interface and the fiber output interface, and threads are arranged at the outer parts of the fiber input interface and the fiber output interface; and a switch for controlling a power supply of the optical signal transceiving device is also arranged on the wiring unit. The invention also discloses a wiring method of the electric energy meter. The invention has the following beneficial effects that: the structure is simple, the use is convenient, the manufacture, the installation and the maintenance are easy, and the like.

A multimode optical fiber for continuous transmission of electromagnetic radiation at high power, wherein the fiber defines a fiber axis and includes a core and a cladding surrounding the core, and wherein the multimode optical fiber is a multimode graded-index fiber, the refraction index profile in the fiber essentially following formula (1):n⁡(r)={n1⁡[1-2⁢(ra)g⁢Δ]1⁢ / ⁢2,r<an2,r>a(1)Δ=n12-n222⁢n12(A)NA=n12-n22(B)where Δ is formula (A), r is the distance from the fiber axis, n(r) is the nominal refractive index as a function of distance from the fiber axis, n1 is the nominal refractive index on the axis of the fiber, n2 is the refractive index of the cladding, a is the core radius, and g is a parameter that defines the shape of the profile, where the core diameter 2a is between 90 UM and 190 μM, the parameter g is between 1.2 and 1.8, and the numerical aperture (NA) of the fiber, formula (B), is between 0.2 and 0.3.

A power over fiber system includes: a power sourcing equipment, a powered device, an optical fiber cable, a temperature sensor and a controller. The power sourcing equipment includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The powered device includes a photoelectric conversion element that converts the feed light from the power sourcing equipment into electric power. The optical fiber cable transmits the feed light from the power sourcing equipment to the powered device. The temperature sensor detects a temperature of the photoelectric conversion element. The controller performs a process of lowering an output level of the feed light in response to the temperature detected by the temperature sensor being equal to or higher than a predetermined threshold value, and performs a process of raising the output level of the feed light in response to the temperature being lower than the predetermined threshold value.

The invention relates to a power-over-fiber (PoF) system, comprising: an optical source configured to generate an optical signal, wherein the optical signal comprises an intensity modulation; an optical fiber configured to receive the optical signal from the optical source and to guide the optical signal; an optical sink, which is configured to receive the optical signal from the optical fiber and to convert the optical signal into an electrical signal; a detection unit, which is configured to detect at least one characteristic of the electrical signal, wherein the characteristic is at least partially caused by the intensity modulation of the optical signal; and a control unit, which is configured to control the optical source based on the detected characteristic.

The invention discloses a current induction type power supply of a power grid monitoring device, belongs to the field of power grids and solves the problem that the conventional power supply of the power grid monitoring device exists in modes of mains supply conversion, solar energy, storage battery and optical fiber power supply. The current induction type power supply of the power grid monitoring device comprises a current transformer, a rectification circuit, a voltage stabilizing circuit, a step-down circuit and n load controllers, wherein n is a natural number which is greater than or equal to 1; the current transformer acquires a secondary current signal by inducing current in a power grid bus; a secondary side of the current transformer is connected with the rectification circuit; an output end of the rectification circuit is connected in parallel with the load controllers; an output end of each load controller is connected with an input end of the voltage stabilizing circuit; an output end of the voltage stabilizing circuit is connected with an input end of the step-down circuit; and an output end of the step-down circuit is connected with a load. The device provided by the invention is used for providing power for the power grid monitoring device.