60 results about "Wireless energy harvesting" patented technology

In embodiments of the present disclosure improved capabilities are described for an RF wireless energy-harvesting device comprising an energy-harvesting mechanism, a message generation facility, and a transmission facility, wherein the RF wireless energy-harvesting device generates electrical energy through the energy harvesting mechanism from a harvesting action, generates a message through the message generation facility, and transmits the message through the transmission facility to a second wireless device, wherein the second wireless device is a second RF wireless energy-harvesting device, a networked device, a mesh network node, or the like.

The invention relates to a visible light/radio frequency hybrid cooperative communication method based on wireless energy harvesting and non-orthogonal multiple access, applied to a user cooperative communication system of visible light/radio frequency communication. The system comprises an LED light source and a user group, users in an area closer to the LED light source are near users; and otherusers in the user group are remote users. The method comprises the following steps; (1) within a first stage T time, the near users convert light signals emitted by the LED light source into electricenergy for storage; within a second stage 1-T time, the near users receive the light signals emitted by the LED light source, demodulate the light signals emitted by the LED light source, and demodulate information of the near users and the information of the remote users; and (2) the near users send the demodulated information of the remote users to the remote users through radio frequency signals by using the stored electric energy. In the communication method provided by the invention, the energy consumption problem of the user equipment is also considered, and an energy harvesting moduleis added, thereby being green and environmental friendly.

A device may operate using power generated by an energy harvesting system that generates power from, wireless signals. The energy harvesting system may collect wireless signals and convert the signals to energy. In one form factor, a device utilizing an energy harvesting system may operate without a battery and without a connection to a wired power source. In some cases, super capacitors may be used to store small harvested amounts of power for use by the device.

The embodiment of the invention provides an optimal relay selection method and apparatus, applied to a wireless energy collection type relay transmission system, wherein the relay transmission system comprises a source node, a destination node and a plurality of relay nodes. The method comprises the following steps: for each relay node, calculating a power allocation coefficient on the relay node, allocating the power from the source node received by the relay node according to the power allocation coefficient, so that the relay node performs decoding, obtaining decoding results of the plurality of relay nodes, judging whether the decoding results are correct, if so, storing the relay nodes corresponding to the decoding results in a set, and selecting the relay node having the maximum signal to noise ratio of a link from the relay node to the destination node in the set as the optimal relay to perform information forwarding. The optimal relay selection method and apparatus provided by the invention is realized on the basis of the dynamic power allocation on the relay nodes, the energy utilization rate can be effectively improved on the premise of ensuring the performance of the existing communication system, and the environmental protection of the communication system is realized.

The invention discloses a wireless energy collecting device based on a super-surface structure. The wireless energy collecting device comprises a super-surface array structure and a rectifying circuit, the super-surface array structure is composed of a plurality of super-surface structure units, the super-surface structure unit comprises a metal layer, a first dielectric substrate, an air layer, afirst ground layer and a power synthesis network layer, which are sequentially arranged from top to bottom, and the power synthesis network layer comprises a second ground layer, a second dielectricsubstrate and a first signal layer, which are sequentially arranged from top to bottom; the rectifying circuit is arranged in the air layer, an electromagnetic structure layer is connected with the first signal layer through a metallized through hole formed in the metal layer, and an output port of the power synthesis network layer is connected with an input port of the rectifying circuit. The device simplifies the structure of the existing energy collecting device, reduces the manufacturing cost of the energy collecting device, and effectively improves the efficiency of the energy collectingdevice at the same time.

The invention discloses a channel estimation method of an amplify-and-forward repeater adopting wireless energy collection. The channel estimation method comprises the following steps: establishing atime-selective Rayleigh fading model; calculating channel gains from two strategy lower information sources to a repeater chain and from the repeater to a destination chain on a repeater and a destination by adopting a linear minimum mean square error theory. By adopting the method disclosed by the invention, the technical problems in the prior art that the channel estimation method of the amplify-and-forward repeater adopting the wireless energy collection is lacked are solved; a channel estimation value can be rapidly and accurately obtained, and the calculation is accurate and effective.

The invention discloses a cognitive energy-carrying relay communication method based on multi-time-slot wireless energy collection, and the method comprises the steps that a cognitive network judges whether an authorized spectrum of a main network is idle or not through spectrum sensing, and a cognitive relay node collects the energy transmitted by a main user transmitting end in a wireless energycollection mode if the authorized spectrum is occupied; otherwise, the cognitive network enters an energy-carrying relay communication mode, and the cognitive relay node forwards the information of the cognitive user sending node to the cognitive user receiving node by utilizing the collected energy. The cognitive relay node collects wireless energy through a plurality of time slots and forwardsinformation, so that more energy can be obtained, and the relay forwarding efficiency is effectively improved.

The invention relates to a maintenance-free wireless door sensor and a wireless door sensor system. The door sensor comprises a door sensor body and a door sensor pedestal; the door sensor body is fixed on the door sensor pedestal; and the door sensor body comprises a casing, a chargeable battery, a solar cell panel, a wireless energy collecting and converting device, a USB charging interface and a mini coil, wherein the solar cell panel is arranged on the casing, the wireless energy collecting and converting device is arranged in the casing, the USB charging interface is arranged at one side of the casing, and the mini coil is arranged in the casing. The maintenance-free wireless door sensor of the structure can ensure that the door sensor does not require maintenance in the service life and realize maintenance-free automatic power supply, and is simple in structure and wide in application range.

The invention discloses a resource allocation method of a wireless energy collection type full duplex cooperative relay system. The method comprises the steps of constructing a transmission signal model, estimating channel state prediction information, determining a power allocation coefficient alpha of each transmission period, determining a time slot allocation coefficient beta of each transmission period and determining an interruption probability Pout of the system. According to the invention, an existing full-duplex cooperative relay system is adopted. A reasonable transmission signal model is established. Compared with the prior art, a resource allocation method is provided. Limited spectrum resources are fully utilized so that the interruption performance of the system is improved.Compared with an existing power allocation method, when the transmitting power PS of each transmission period ranges from 0 dBm to 20 dBm, the interruption probability of the system is reduced by 0.041-0.00084. The method has the advantages of reasonable resource allocation, simple method, good interruption performance and the like, and can be applied to the technical field of energy-carrying communication.

The invention provides a wireless energy receiving system, which is used for a wireless energy receiving end and includes a resonance module, a rectifier module, a control module and a driving module. The resonance module is used for receiving wireless energy and converting the received wireless energy into alternating voltage signals. The rectifier module is electrically connected to the resonance module, includes a plurality of field effect transistors and is used for performing rectification on the alternating voltage signals. The control module is electrically connected to the rectifier module, and is used for outputting a plurality of sequential control signals to control the plurality of field effect transistors in one-to-one correspondence. The driving module is electrically connected to the rectifier module and the control module, and is used for amplifying the plurality of sequential control signals to control the on-off states of the plurality of field effect transistors. The abovementioned wireless energy receiving system adopts the four high-voltage power field effect transistors to perform full-bridge rectification on the alternating voltage converted from the received wireless energy, thereby effectively improving conversion efficiency of a rectifier bridge.

The invention relates to a wireless energy collecting device including an antenna, an antenna impedance conversion circuit, and a wireless DC converter, the antenna impedance conversion circuit is connected with the antenna to convert the impendence R antenna+jX antenna of the antenna to an R' antenna+jX' antenna, so that the R' antenna+jX' antenna of the antenna after the impedance conversion is conjugated with the impendence R antenna+jX antenna of the wireless DC converter; the wireless DC converter is connected with the antenna impedance conversion circuit to convert the output signal of the antenna impedance conversion circuit into a DC signal, wherein the impedance of the wireless DC converter is set the absolute value of an imaginary part X converter to be N times of the absolute value of a real part R converter, N>square root of 3. The device can achieve good voltage amplification and good impedance matching. The invention further relates to a passive voltage conversion matching circuit and a corresponding sensing device.

The invention discloses an energy-saving relay selection method for a wireless energy collection cooperative communication system, which correspondingly adopts a single-relay forwarding strategy and amulti-relay forwarding strategy under the condition that the energy of a relay node with an EH capability meets the forwarding requirement and does not meet the forwarding requirement. When the energy of part of the relay nodes meets the forwarding requirement, an optimal relay node can be selected from the relay nodes to forward a signal at the optimal power; And when the energy of all the relaynodes does not meet the forwarding requirement, forwarding by using the plurality of relay nodes in a cooperative manner, and carrying out signal combination at a receiving end. No matter a single relay forwarding mode or a multi-relay forwarding mode is adopted, energy can be saved as much as possible while effective signal transmission can be guaranteed, utilization of collected energy is optimized, and system performance can be improved.

The invention relates to the technical field of electronic communication, in particular to a bridging electric tuning antenna of an RFID reader-writer, which comprises an antenna shell and a coupled antenna, wherein a radiation antenna and a power divider are arranged in the antenna shell; one output end of the power divider is connected with the radiation antenna; wherein a wireless energy collection unit, a control unit and a tuning unit are arranged in the antenna shell; the other output end of the power divider is connected with the input end of the wireless energy collection unit; the output end of the wireless energy collection unit is used for supplying power to the control unit; the control unit is used for generating a triangular wave signal to the tuning unit; and the tuning unitis connected with the radiation antenna. According to the invention, the matching circuit can be automatically tuned according to the deterioration degree of the antenna performance, the antenna performance is optimized, and the read-write distance of the whole RFID reader-writer is increased; electromagnetic wave signals are collected and converted to supply power to the bridging electric tuningantenna, and extra external power supply is not needed.

The invention discloses a surface plasmon meta-material based multi-frequency high-gain electric small antenna. The antenna comprises a metal annular grating, a dielectric layer and microstrip line metal patches, wherein the metal annular grating, the dielectric layer and the microstrip line metal patches are arranged successively from top to bottom and fit to one another. The size of the antenna is sub-wavelength which is about 1% of the wavelength, in the lowest working frequency, of the antenna. A surface plasmon meta-material based multi-frequency high-gain electric small antenna array comprises two or more a surface plasmon meta-material based multi-frequency high-gain electric small antennas, the unit spacing can be much lower than 0.5 wavelength, and the array gain is improved obviously. The antenna and antenna array have the advantages of small size, multiple frequency ranges, high gain and the like, the antenna and antenna array can work in multiple frequency ranges including the broadcast and television frequency range, the GSM frequency range and the WiFi frequency range, the gain and efficiency are higher, and the antenna and antenna array can be used for wireless energy collection.

A system employs wave energy harvesting apparatus and a water vessel (e.g., a ship) carrying an energy storage apparatus (e.g., array of batteries). The energy harvesting apparatus is preferably also carried by the water vessel, but may be fixed or carried by a separate water vessel. The water vessel is operated in an energy storing mode at an energy harvesting location subject to wave activity, during which the energy storage apparatus stores energy from the wave activity as harvested by the energy harvesting apparatus. The water vessel is operated in an energy transporting mode to transport the stored energy from the energy harvesting location to an energy releasing location (preferably onshore, but may be offshore) having a connection to an electrical power grid. The water vessel is operated at the energy releasing location in an energy releasing mode in which the stored energy is transformed into appropriate AC electricity supplied to the electrical power grid.

A wireless energy collection type GB/T29768 national standard internet of things label disclosed by the present invention is applied to the radio frequency identification field, adopts a wireless energy collection mode to supply power, realizes a internet of things label satisfying a GB/T29768-2013 national standard ultrahigh-frequency RFID protocol, collects the energy simultaneously via three wireless energy collection schemes of the solar energy collection, the GSM900 frequency band radio frequency energy collection and the GSM1800 frequency band radio frequency energy collection, enables the energy collection time of a system to be shortened substantially, supplies an enough working voltage to the system, and guarantees the reliable operation of the system. The internet of things labelof the present invention can realize the long-distance communication of the active label, also overcomes the disadvantages that the active label is short in service life and needs to replace a battery frequently, and can satisfy the requirements of the wireless sensor network label nodes for the low power consumption and continuous work.

An apparatus comprises a structure including a cavity that, when excited with electromagnetic energy, produces an electric field having randomized distribution of field amplitude and polarity. The apparatus further comprises a sensor within the cavity. The sensor has a plurality of antennas for wirelessly harvesting operating power along different paths within the cavity.

The invention discloses a wireless energy transmitting system and a harmonic wave eliminating and power adjusting method for the wireless energy transmitting system. According to the wireless energy transmitting system, an inverter is a cascade type multi-level inverter formed by cascading the output end of a first full-bridge inverter (H1) and the output end of a second full-bridge inverter (H2). The input end of the first full-bridge inverter (H1) is connected with a first direct-current power source (E1). The input end of the second full-bridge inverter (H2) is connected with a second direct-current power source (E2). The first power source (E1) and the second power source (E2) are isolated from each other, and the amplitudes of the output voltages of the first power source (E1) and the amplitudes of the output voltages of the second power source (E2) are identical. The inverters and a current sensor (IP) are both connected with a controller in the specific mode that the control end of the first full-bridge inverter (H1), the control end of the second full-bridge inverter (H2) and the output end of the current sensor (IP) are all connected with the controller (KP). The wireless energy transmitting system is high in output electric power, low in complexity, high in reliability, and high in efficiency.

Disclosed in the present invention are a resource allocation method and a device of an underwater acoustic communication system having wireless energy collection capability. In said method, an underwater acoustic transducer array is provided at a backbone network base station or a central node, and a weight matrix of the underwater acoustic transducer array of the base station is optimized by means of a beamforming technology, so that an underwater acoustic signal emitted by the base station is aligned with an underwater terminal node. After an acoustic wave signal received by the underwater terminal node is converted into an electrical signal by means of the underwater acoustic transducer, a power splitter is used to separate the electrical signal into two paths of signal flows, one path of signal performing signal detection, and the other path of signal performing energy collection by means of an energy collection module, and the collected energy charges a battery of the terminal node by means of a power supply module, thereby achieving energy supplement of the terminal node. Said method obtains the maximum energy collection of a terminal node while ensuring the communication quality, thereby performing energy supplement to the terminal node of the underwater acoustic communication network to the maximum extent.

The present invention discloses a wireless energy collection metamaterial antenna with an adjustable broadband. The antenna comprises a rectangular double-layer circuit board, the upper layer of the rectangular double-layer circuit board is provided with at least one rectangular metal sheet-shaped radiation unit and a rectangular metal sheet-shaped launching pad, and the lower layer of the rectangular double-layer circuit board is provided with a metal ground plate; the radiation unit and the launching pad are equidistantly arranged in order in the mode of allowing the geometric centers of the radiation unit and the launching pad to be located at the middle line of the long side of the rectangular double-layer circuit board, and one side of the launching pad is overlapped with one side of the rectangular double-layer circuit board; a capacitor is arranged between the radiation unit and the launching pad, and the capacitance of the capacitor is regulated; and the geometric center of the radiation unit is connected with the metal ground plate through a metallization via hole. The wireless energy collection metamaterial antenna with the adjustable broadband has the characteristics of adjustable broadband and frequency band, is suitable of the microwave wireless energy collection in the environment, and is simple in structure, miniaturized, low in manufacturing cost and especially easy to be integrated to other wireless node devices while realizing large-scale radio wave energy collection.