Patents
Literature

82 results about "Energy harvesting" patented technology

Energy harvesting (also known as power harvesting or energy scavenging or ambient power) is the process by which energy is derived from external sources (e.g., solar power, thermal energy, wind energy, salinity gradients, and kinetic energy, also known as ambient energy), captured, and stored for small, wireless autonomous devices, like those used in wearable electronics and wireless sensor networks.

Potential energy storage type device for collecting scattered energy

A potential energy storage type device for collecting and storing scattered energy comprises an energy input shaft, wherein the energy input shaft is connected with a front half shaft by a retarding mechanism and the front half shaft is connected with a rear half shaft by a clutch. The rear half shaft is connected with a potential energy storage unit which is used for receiving the kinetic energy acquired by the rear half shaft and transforming the kinetic energy to the potential energy to store. An energy transformation control system is arranged inside the clutch to control the clutch actions. The potential energy storage type device has the advantages that, according to the law of the conservation of mechanical energy, scattered kinetic energy can be transformed to potential energy for storage temporarily; when the kinetic energy accumulates to a certain extent, constant and stable kinetic energy is released to drive an electric energy transducer. Compared with using flywheels as an energy storage unit, the potential energy storage type device is capable of realizing long-hour energy storage; while compared with the energy collecting mode of electricity generation, defects of electricity generation can be avoided so as to significantly improve the energy efficiency and the stability of generating capacity.
Owner:GUANGXI UNIVERSITY OF TECHNOLOGY

Three-phase flyback voltage-multiplying single-switch rectifying circuit for small-scale wind power generation

The invention discloses a three-phase flyback voltage-multiplying single-switch rectifying circuit for small-scale wind power generation. The circuit comprises a three-phase AC (Alternating Current) power supply, filtering capacitors C1, C2 and C3, a three-phase single-switch BOOST rectifying circuit, three flyback voltage-multiplying rectifying circuits, a signal acquisition circuit and a control circuit; the three-phase single-switch BOOST rectifying circuit comprises an uncontrollable rectifier bridge and a BOOST booster circuit; a three-phase single switch VT is controlled to be switched on and off by adopting a pulse frequency modulation (PFM) technology; an output voltage of the integral three-phase single-switch BOOST voltage-multiplying rectifying circuit is the sum of voltages on output capacitors Ca, Cb and Cc of a three-phase voltage-multiplying circuit and an output capacitor Co of a main circuit, so that the rectified output voltage is improved. Compared with the prior art, the rectifying circuit has the characteristics of high efficiency, high output voltage and the like compared with a conventional three-phase uncontrollable rectifying circuit and is very suitable for being used under the conditions with a lower wind speed and difficulty and high requirements on energy harvesting.
Owner:TIANJIN UNIV

Relay transmission system based on FSO/RF link and energy control method

InactiveCN108540228ARadio-over-fibreElectromagnetic repeatersEnergy harvestingVIT signals
The invention discloses a relay transmission system based on an FSO/RF link. The system comprises a photoelectric converter, an energy harvesting device, an energy control device and an RF signal transmitter. The energy harvesting device is connected with the photoelectric converter, thereby harvesting a direct current component output by the photoelectric converter. The energy control device is connected with the energy harvesting device, thereby converting the direct current component into a working voltage/direct for the RF transmitter to transmit an RF signal when the direct current component harvested by the energy harvesting device is equal to a target threshold. According to the scheme, the direct current component in the signal converted by the photoelectric converter is harvestedby the energy harvesting device, and the direct current component is converted by the energy control device into the working voltage/direct for the RF transmitter to transmit the RF signal. Accordingto the scheme, the direct current component can be harvested effectively and the direct current component is used as the working voltage/direct for the RF transmitter to transmit the RF signal, so theresource waste is avoided. The invention also discloses an energy harvesting method. The method has the benefits as above.
Owner:GUANGDONG UNIV OF TECH

Multi-arm coupled collision piezoelectric energy collection device

The invention provides a multi-arm coupled collision piezoelectric energy collection device and is intended to solve the technical problem that an existing piezoelectric energy collection device has low energy collection efficiency; the multi-arm coupled collision piezoelectric energy collection device comprises an outer frame, piezoelectric vibrators, a first base, a simple pendulum structure, a first magnet and a second magnet; the piezoelectric vibrators at least include a first piezoelectric vibrator and a second piezoelectric vibrator, the bottom ends of the vibrators are fixed to the first base and may generate high mutual coupling upon resonance, the simple pendulum structure comprises a second base, a link, a rocker and a striker ball, the bottom end of the link is fixed to the second base, the top end of the link is movably connected with the upper end of the rocker, the striker ball is fixed to the lower end of the rocker, and the striker ball may collide with the free end of the first piezoelectric vibrator or second piezoelectric vibrator while rocking, the first base and the second base are fixed to the bottom of the outer frame, the side of the outer frame close to the simple pendulum structure is fixedly provided with the first magnet, and the top of the outer frame close to the piezoelectric vibrators is fixedly provided with the second magnet. The multi-arm coupled collision piezoelectric energy collection device has effectively improved energy collection efficiency.
Owner:XIDIAN UNIV

Distributed task unloading and computing resource management method based on energy collection

The invention belongs to the technical field of mobile communication, and particularly relates to a distributed task unloading and computing resource management method based on energy harvesting, which comprises the following steps: establishing a task local computing model and an edge cloud computing model; establishing a target function for maximizing the revenue of the equipment end based on disturbance Lyapunov optimization and a target function for maximizing the revenue of the moving edge computing server; the equipment pre-selecting a mobile edge computing service server to unload the task according to a pre-screening criterion; utilizing a Lagrange multiplier method and a KKT condition to calculate an optimal task quantity strategy for unloading from the equipment end to the selected mobile edge computing server; obtaining an optimal quotation strategy of the mobile edge computing server to the equipment end in each time slot; and obtaining a solution of the optimal task quantity strategy and the optimal dynamic quotation strategy meeting the Steinkelberg equilibrium as a resource allocation strategy. According to the invention, stable management of the battery energy level and on-demand allocation of computing resources for heterogeneous users are realized.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Internet of things-based public transportation system management device and method

ActiveCN103700278ARoad vehicles traffic controlEnergy harvestingTransportation Systems Management
The invention discloses an Internet of things-based public transportation system management device and an Internet of things-based public transportation system management method, relates to the technical field of transportation, and particularly provide a system device and a system method for performing transportation management by using the Internet of things. The device is characterized in that the device is provided with a control box (1), an LED (light-emitting diode) display device (2), illumination devices (3) and a broadcasting device, wherein the control box is connected with the LED display device, the illumination devices and the broadcasting device respectively; a bus station end information processor (4), information transceiver equipment (5) and a sensor device (6) are arranged in the control box; an energy collection device (7) is arranged on the outer side of the control box; the bus station end information process can be connected with an Internet of things-based intelligent public transportation center control module (8), and is also connected with the information transceiver equipment. The device and the method have the positive effects of high efficiency, high speed, improvement in riding efficiency, time saving, convenience and intelligence.
Owner:山东点联航天科技有限公司

Vibration energy capturing wireless sensor network node for monitoring gas under coal mine

The invention discloses a vibration energy capturing wireless sensor network node for monitoring gas under a coal mine, and the node comprises a piezoelectric power generation device which is used forcollecting underground vibration energy and converting the vibration energy into electric energy, an intrinsic-safety type energy collection management module, a gas sensor, a signal conditioning andcontrol module and a wireless receiving and transmitting module. The output end of the piezoelectric power generation device is connected with the intrinsic-safety type energy collection management module, and the output end of the intrinsic-safety type energy collection management module is connected with the gas sensor, the signal conditioning and control module and the wireless receiving and transmitting module. The output end of the gas sensor is connected with the signal conditioning and control module, and the signal conditioning and control module is connected with the wireless receiving and transmitting module. The node is high in energy conversion rate, is stable in supply voltage, is long in service life, reduces the maintenance cost, can achieve the all-weather operation, and guarantees the safety of the coal mine.
Owner:CHINA UNIV OF MINING & TECH

Massive MIMO information and energy simultaneous transmission system optimization method for hardware damage

The invention discloses a Massive MIMO information and energy simultaneous transmission system optimization method for hardware damage, and the method comprises the steps: establishing a Massive MIMOdownlink signal-energy simultaneous transmission system model, and respectively discussing the hardware damage at a base station transmitter, the hardware damage at an information receiver of a user,and the hardware damage at an energy receiver of the user; according to hardware damage models at a base station, an information receiver and an energy receiver, ensuring that the total power constraint sent by the base station and the energy collected at the user energy receiver are greater than a threshold, and expresing the maximum and minimum reachable rate optimization problem of the user; introducing an auxiliary variable and taking a nonlinear energy collection function as a monotone increasing function, and converting the problem P1 into a problem P2; expressing the energy collection constraint of the user, the total power constraint of the base station and the reachable rate constraint of the information user as a function of a sending signal variance and a pseudo variance; and solving the maximum and minimum reachable rates of the users, and realizing system optimization by adopting an iterative optimization algorithm. According to the method, an additional degree of freedomis provided by using an asymmetric Gaussian signal.
Owner:XI AN JIAOTONG UNIV

Intermittent digital sensor working power supply for supplying power with weak environment energy

InactiveCN102957213AReduce the workload of construction workReduce the impactElectrical storage systemEnergy harvestingCapacitance
The invention provides an intermittent digital sensor working power supply for supplying power with weak environment energy, which relates to the technical field of weak-current power supply, and aims to reduce the construction workload of a sensor and alleviate the influence on surrounding electric equipment by wiring of the sensor. The power supply comprises an energy storage loop, a voltage switching loop and a weak energy collecting device, wherein the weak energy collecting device is used for collecting the weak environment energy for charging the energy storage loop; the energy storage loop consists of an energy storage capacitor and is used for storing and outputting electric energy; the voltage switching loop comprises a switching comparer and an electronic selector switch; the energy storage loop outputs the electric energy through the electronic selector switch; and the switching comparer is used for detecting end voltage of the energy storage loop and controlling the intermittent on and off of the electronic selector switch according to a value of the end voltage of the energy storage loop. The power supply provided by the invention is suitable for supplying the working power to the micro-power-consumption sensor intermittently used by an internal circuit.
Owner:SHANGHAI ZHENYUAN POWER ELECTRONICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products