58results about How to "Reduce power demand" patented technology

The invention provides a broadband high-efficiency three-path Doherty power amplifier based on a post-matching network. The broadband high-efficiency three-path Doherty power amplifier comprises a three-path equal power divider, a phase compensation network, a carrier amplification circuit, a first peak amplification circuit, a second peak amplification circuit, a compensation line and a rear matching network, wherein each amplifying circuit comprises an input matching network, an amplifier and an output matching network; each output matching network is implemented by adopting an L-shaped LC matching network which is connected with an inductor in series and then connected with a capacitor in parallel; and after the L-shaped LC matching network of the carrier amplifying circuit is convertedinto a microstrip line, a final output matching network is obtained through using an optimization circuit. According to the broadband high-efficiency three-path Doherty power amplifier, the post-matching network and the novel output matching network are adopted, the bandwidth and the output efficiency of the Doherty power amplifier are effectively improved, the defect that the circuit performanceis obviously inconsistent when the networks are applied to the three-path Doherty power amplifiers is overcome by using the optimization circuit, and finally, high-efficiency output in a wide-frequency and wide-backoff range is realized.

The invention relates to a new energy vehicle charging pile with an energy saving and waterproof function. The new energy vehicle charging pile with the energy saving and waterproof function comprisesa main body, a base, a charging plug, a central control mechanism, a power generation mechanism, a fire extinguishing mechanism and a heat radiation mechanism; a power generator comprises a lifting component and a bending component; the bending component comprises a driving unit, a supporting rod, a connecting block and two bending units; and the fire extinguishing mechanism comprises a telescopic component, a reciprocating component and a fire extinguisher. According to the new energy vehicle charging pile with the energy saving and waterproof function, by using the power generation mechanism, light energy can be sufficiently utilized to generate power to be stored for for a rainy day; and moreover, the demand on power grid electric quantity is reduced so that the new energy vehicle charging pile is more energy saving; in addition, through lifting, a solar cell panel can be folded into the main body to be protected under extreme severe weather to prevent the solar cell panel from being damaged, and therefore, economic loss is reduced; and by using the fire extinguishing mechanism, the fire can be rapidly extinguished by using sound waves to extinguish the fire so that the practicability and safety of the charging pile are enhanced.

A device for reducing the power demand for the propulsion of a ship, and for broad-built or non-broad-built not-very-fast ships of any type which is affixed to the hull at a short distance upstream of the propeller, comprises a fore-nozzle with fins or hydrofoils that are arranged within the fore-nozzle, wherein the fore-nozzle, at the top, can be tilted forwards by up to 8°, on a horizontal transverse axis that extends through the centre of the fore-nozzle.

The invention belongs to the technical field of underwater motion control of deep water submersibles, and discloses an unpowered dive floating motion method and system applied to a large depth submersible. The method comprehensively uses a horizontal rudder, a vertical rudder, a dive ballast, a floating ballast, a vertical tilting adjustment system and the like, so that the submersible dives or floats at a certain pitch angle, so that the submersible is more streamlined in the moving direction during the dive or floating process, a water body is reduced in pressure when flowing through the outer surface of the submersible and presents a graded state, the sticking resistance is effectively reduced, and the total resistance is reduced. The method improves the speed of the dive and floating,so that the submersible has a longer underwater effective working time; the method is generally based on the basic components of the conventional submersible, improves the diving and floating speed ofthe submersible by means of function expansion, position adjustment, combined application and the like, reduces non-working time, and has a comprehensive advantage in terms of economy, operating habits and construction experience.

The invention discloses a device for realizing volatile memory backup. The device for realizing volatile memory backup comprises a volatile memory, a non-volatile memory, a power supply switchover unit used for selecting an external power supply or an internal power supply to supply power, an internal power supply used for supplying power during extreme abnormal power-off, and a mixed memory control unit. By virtue of the technical scheme provided by the invention, backup for data in the volatile memory into the non-volatile memory is finished by using the mixed memory control unit during extreme abnormal power-off, thus preventing a plurality of modules from being coordinated and matched to finish the function, and then effectively lowing the complexity of design and debugging for volatile memory data backup, and greatly meeting market needs on volatile memory backup.

The invention provides a processing method for playing video files, a device and display equipment. The method comprises the following steps: the current electric quantity of the display equipment andthe first resolution and the playing duration of a first video file are acquired, and the display equipment supplies power by a power supply with limit energy; according to the playing duration and the corresponding electric quantity consumption rate of the display equipment for displaying the video file by the first resolution, the first electric quantity needing to be consumed by the first resolution for displaying the first video file is calculated; and when the current electric quantity is less than the first electric quantity, the resolution of the first video file is reduced from the first resolution to the second resolution, a second video file is obtained, and the first display data of the second video file is sent to the display equipment. The invention reduces the energy consumption of the display equipment and leads a user to be capable of displaying video files as numerous as possible under the condition of limit energy.

The invention discloses a current transformer and a bus current detecting method based on a neural network. The current transformer comprises an incident optical path, a sensing optical path and a reflection optical path. A fast tunable optical attenuator with ultra-low power consumption is used in the current transformer. The current transformer has the advantages of being low in power consumption, high stability and good in insulation performance. The bus current detecting method based on the neural network comprises the steps that the temperature of an environment where the current transformer located is obtained by using an optical fiber bragg grating, an edge filter and optical fiber shaking eliminating processing, output signals of the current transformer are obtained through the optical fiber shaking eliminating processing, neural network training is carried out by using given bus currents, current transformer temperature and output of the current transformer, and the bus current detecting method is achieved. The bus current detecting method is high in measurement precision and low in temperature drift.

The invention discloses an auxiliary starting device of a power generator. The auxiliary starting device comprises a diesel engine, a spring motor, a rotating speed detection device, an oil pressure detection device, a water temperature measurement device, an accelerator electronic actuator, a control system and a manual power generator. By the arrangement of the spring motor and the manual power generator, the technical problem that a diesel power generator which is used as a standby power supply in a idling state for a long time may not be started successfully in an emergency can be solved.

The invention relates to the field of urban rail transit, in particular to a rail transit station entrance and exit gate machine which comprises a gate machine mainframe box, an arresting module, an authority input module, a pedestrian monitoring module, a weighing ticket rubbing prevention module, a ticket recycling box, a voice module, an alarm module, a visual monitoring module and a controller. The arresting modules are arranged at two ends of the gate mainframe box; wherein the authority input module is fixedly arranged in a gate host case; the pedestrian monitoring module is arranged onthe side wall of the gate host case; one end of the weighing anti-ticket-rubbing module is arranged on the side surface of the head end of the gate host case; the other end of the weighing ticket rubbing prevention module is arranged on a channel between the blocking modules at the front end and the rear end of the gate host case; wherein the ticket recovery box is arranged on the gate host box, the voice module and the alarm module are both arranged in the gate host box, the visual monitoring module is arranged near the gate host box to facilitate shooting, and the controller is further remotely connected with the control center. The technical scheme is high in recognition accuracy, safe and energy-saving.

The invention discloses a power-assisted cycling method of a bicycle, which exerts intermittent or continuous additional force on a wheel or a toothpad of the bicycle to increase the pressure on a bicycle pedal before the power-assisted cycling or driving. The setting of the power assisting element is used for saving the physical strength of the rider, and the setting of the control element is used for detecting the period of time during which the rider needs to drive, and transmitting the detected signal to the power assisting element, so that the power demand for the mobile power supply is very small. Therefore, compared with the shared motorcycle, the mobile power supply has the advantages of small capacitance, small volume, convenient charging and portability; Cycling is cheaper than sharing a bicycle.

An apparatus, a circuit and a method are given, to realize very effective noise suppression for speech signals. Using thereby novel calculation methods allow for a real-time operation without any remarkable delay. Also a significant reduction of the overall processing power demands in conjunction with reduced memory requirements is achieved. Using the intrinsic advantages of that solution the circuit of the invention is manufactured with standard CMOS technology and / or standard Digital Signal Processors at low cost.

The invention discloses an AC (Alternate Current) complementation method for a multipower system. In the AC complementation method, a transformer with a plurality of input ports is used as a power node, wind power and photoelectricity are respectively switched in the input ports of the transformer, grid electricity is switched in other input ports of the transformer, and an output of the transformer is connected with a user or a local area network, so that multipower complementation and power integration are realized at a user side of the transformer, wherein the wind power and the photoelectricity are switched into the transformer in a controlled mode; the grid electricity is switched into the transformer in an uncontrolled mode; the wind power, the photoelectricity and the grid electricity in the multipower system have the same frequency and the same phase; voltage classes of power subsystems can be unequal; and the voltage classes of the power subsystems and a voltage class of the grid electricity can be unequal. The AC complementation method for the multipower system has the significances of locally utilizing wind energy, optical energy and wave energy most conveniently and rapidly and furthest, reducing the requirement of the grid electricity on power capacity and achieving the low-carbon energy-saving and green environmental-friendly effects.

The invention provides a charging station system based on a solid-state transformer, and the system comprises at least one solid-state transformer, and the input side of the solid-state transformer isconnected with a power distribution network, and the output side is connected with at least one DC bus; and the DC bus is connected with at least one isolated charger and a non-isolated charger. Thecharging station system has high efficiency, does not need to be equipped with extra power quality management equipment, and can reduce power loss, reduce cost and the like.

The invention relates to an intelligent environmental protection box monitoring system and method based on the Internet of Things and belongs to the technical field of the Internet of Things. The system includes a data acquisition device, a charging device, an intelligent control box, a background management platform and a terminal device, wherein the intelligent control box includes an MCU, an A / D conversion circuit, a power source conversion module, a GPRS / GPS module, a debugging module and a clock chip. The method comprises steps that the capacity and temperature data of a dustbin are collected by the intelligent control box, and the collected data and a GPS position signal are sent to a base station through wireless transmission; the received information is transmitted by the base station to the background management platform; the reported data of each dustbin site is monitored by the background management platform, when the dustbin is full, or temperature abnormality of the dustbin is reported, the dustbin is managed in real time through notifying environmental sanitation workers in a short message or APP mode. The system is advantaged in that intelligent real-time monitoringof an environmental protection box is realized, and management efficiency of the environmental protection box is improved.

Embodiments of the present invention provide a method and apparatus for collecting terminal information, wherein the method includes: cyclically establishing a cell corresponding to each preset frequency point; and collecting terminal information based on the cell corresponding to each preset frequency point. The method and device provided by the embodiments of the present invention can only realize the establishment of three or four cells with different frequency points by cyclically establishing a cell corresponding to each preset frequency point, compared with the original base station, and the preset frequency point is not limited. The number of points ensures that the base station can establish cells corresponding to all preset frequency points to realize comprehensive terminal information collection, which improves the terminal information collection effect. In addition, only one cell corresponding to the preset frequency is established at each moment in the cycle process, which effectively reduces the power demand of the base station, and does not require an external power supply or a large battery to supply power to the base station, which enhances the portability of the base station and greatly improves terminal information collection. Flexibility and convenience.

A fuel cell system utilizes at least one flow restricting device to vary the stoichiometric quantity of cathode reactant flowing to two discrete cathode sides of the fuel cell system. The varying of the stoichiometric quantity of cathode reactant can be between two predetermined values. The varying of the stoichiometric quantity can be during a steady state power demand placed on the system and / or during transients in a power demand placed on the system. The airmover that supplies the cathode reactant stream can be operated in a substantially continuous manner during a continuous power demand placed on the fuel cell system.

The invention discloses a double-line full-parallel AT traction power supply system and method based on comprehensive energy, including a double-line full-parallel AT traction power supply system and an integrated energy system; a photovoltaic array, a wind power generator set, and a fuel cell are connected in parallel to a DC bus, and electricity-hydrogen is added Energy storage is used to make up for power shortages, cut peaks and fill valleys. The comprehensive energy is connected to the traction power supply system in a reasonable way, and through real-time detection of the power and status of each micro-source, based on the particle swarm algorithm, the energy optimization with the goal of the lowest total power generation cost is realized. manage. The invention can ensure the safety and stability of the system and high reliability of power supply; optimize the structure of traction energy consumption and improve the consumption level of new energy; conform to the development direction of national energy conservation and emission reduction, and reduce the power supply demand of electrified railways for power systems to a certain extent.