59results about How to "Adjust working frequency" patented technology

Provides a technique for handheld multimedia devices that uses historical load profile statistics for a particular multimedia stream to dynamically scale the computing power of a computing engine based on the complexity of the multimedia content, thereby reducing power consumption for less computationally intensive content, and The power consumption is thus significantly reduced for the duration.

The invention discloses a device and method for rapidly forming a metal part through induction heating. The device comprises a base plate, a front heating unit and an induction smelting unit. The base plate is located below the induction smelting unit and used as a platform for metal part forming. The front heating unit is located between the base plate and the induction smelting unit and used for forming a uniform temperature field. The induction smelting unit comprises a support and a smelting crucible arranged on the support. An induction coil is arranged on the smelting crucible. The outlet end of the smelting crucible is provided with a smelting crucible nozzle opposite to the base plate. The inlet end of the smelting crucible is connected with an air inlet through a rubber plug and used for providing inert gas for the smelting crucible. The method is used for achieving induction heating and rapid forming of the metal part through the device. The device and method have the advantages of being high in machining flexibility, small in subsequent machining amount and the like.

The present invention discloses a multiple resonance tube thermo acoustic engine which disposes two or more resonance tubes on a thermo acoustic engine. The thermo acoustic engine is a travelling wave thermo acoustic engine, a standing wave thermo acoustic engine or a travelling wave and standing wave mixing type thermo acoustic engine. The resonance tube is an equal diameter tube, a variable diameter tube or the combination to them. The present invention optimizes the sound field distribution of a thermo acoustic engine, reduces the glutinosity flow lost for a thermo acoustic heat regenerator, restrains the nonlinear effect in the tube, improves the adaptive ability for the engine, and achieves the object of improving heat conversion efficiency. In addition, the present invention can conveniently adjust the work frequency of the thermo acoustic engine and optimize the frequency matching between the thermo acoustic engine and other driven load such as pulse tube refrigerator by coupling different resonance tube structures.

A method for adjusting the operating frequency of a chip. The method first detects the frequency adjustment range of the display chip when the system is turned on. Then, execute the full-screen application and enable the control hotkey. Then, receiving the input of controlling the hotkey to display the user interface. Finally, the input frequency input by the user interface is received, and the operating frequency of the display chip is adjusted within the frequency adjustment range according to the received input frequency. In this way, even when an application program with a full-screen image is being executed, the operating frequency of the display chip can be adjusted at any time as required, which is very convenient.

The invention discloses a metamaterial and a frequency adjustment method and apparatus therefor. The metamaterial comprises a substrate material, an electric controllable structural unit array and a variable capacitance diode, wherein the electric controllable structural unit array is arranged on the substrate material; the electric controllable structural unit array comprises multiple electric controllable structural units, wherein each electric controllable structural unit comprises an external metal structure and an internal metal structure; the internal metal structure and the external metal structure form an annular channel; and the variable capacitance diode is arranged in the channel of each electric controllable structural unit, and used for adjusting the working frequency of each electric controllable structural unit according to the voltages loaded at the two ends of the variable capacitance diode. By virtue of the metamaterial, the technical problem that the working frequency of the metamaterial cannot be adjusted quickly and accurately in the prior art can be solved.

The invention discloses a prestressed tensioning system. The prestressed tensioning system comprises a master controller as well as a first slave controller and a second slave controller which are respectively and wirelessly connected with the master controller through wireless data transmitting modules; both the first slave controller and the second slave controller are connected with jacks through frequency converters, variable frequency motors and hydraulic pumps in sequence; the two jacks are separately connected with pressure sensors for acquiring pressure of oil inlets and displacement sensors for acquiring the displacement of pistons; the pressure sensors and the displacement sensors are used for transmitting acquired signals to the corresponding slave controllers; the acquired signals are transmitted to the master controller through the slave controllers; the mater controller and a remote monitoring center perform data transmission through a GPRS (General Packet Radio Service) wireless network module; the remote monitoring center is provided with a central server and a terminal; the terminal is connected with the central server through an Internet network. According to the prestressed tensioning system disclosed by the invention, the master controller is used for comparing acquired data of the two jacks and transmitting instructions to the variable frequency motors for enabling the two jacks to synchronous tensioning, so high degree of automation is realized.

A decoupling structure among multi-input-multi-output antennas comprises a dielectric substrate and a patch, wherein the patch is arranged on the dielectric substrate and comprises an enclosed rectangular ring, a swastika-shaped structure and/or inverse swastika-shaped structure and a U-shaped strip line structure, wherein the enclosed rectangular ring is arranged on the dielectric substrate, theswastika-shaped structure and/or inverse swastika-shaped structure is embedded into the rectangular ring, the rectangular ring is connected with one end of the U-shaped strip line structure, and the swastika-shaped structure and/or inverse swastika-shaped structure is embedded into a gap of the U-shaped strip line structure. With the adoption of a mode that an inner structure and an outer structure are embedded, resonant property with high impedance characteristic is formed, the decoupling structure is simple and integrates with the multi-input-multi-output antennas, and the whole profile of the decoupling structure is relatively low; the structure is reasonable in layout, the space resource is reasonably utilized, integrated design of a wireless communication system terminal is easy to achieve, and installation and debugging are facilitated; and the structure has relatively small size and is easy to integrate with mobile terminal equipment, the resonant frequency can be conveniently adjusted very well, and the effect of preventing required interference is achieved.

This invention relates to one single layer medium board structure waveguide and micro band transducer signals aligning machine, wherein, the medium board side to wave guide tube is set with metal earth connection board and frequency adjust and match unit; the metal connection board middle is set with one window with same sizes to inner chamber section; the said window central position is set with frequency adjust and match unit; the medium board other side is set with short metal board; there are two open tanks on both side of short metal board.

The invention discloses a frequency-adjustable directed-radiation antenna which comprises a substrate with multiple through holes, a magnetic photonic crystal and a line source. The magnetic photonic crystal is composed of multiple soft magnetic ferrite columns and is of a periodic array structure, each soft magnetic ferrite column is disposed in the corresponding through hole, a bias magnetic field is externally added along the axial direction of the soft magnetic ferrite columns, the line source is positioned in the middle of the photonic crystal, a metal cover plate is arranged on each of the upper surface and the lower surface of the substrate, an aluminum foil covers one side, opposite to the radiation direction, of the photonic crystal, and two ends of the soft magnetic ferrite columns are close to the metal cover plates. The frequency-adjustable directed-radiation antenna has the characteristics of wide frequency band, good directed radiation performance and the like and has the advantages of simple structure, easiness in processing and realizing, low cost and the like.

Embodiments of the invention provide a touch screen sensitivity adjustment method and apparatus, a mobile terminal and a storage medium, and belong to the technical field of mobile terminals. The touch screen sensitivity adjustment method comprises the steps of obtaining preset function items in the mobile terminal and running states of the function items; when the obtained running state meets a sensitivity adjustment triggering condition, determining the function item meeting the triggering condition as an adjustment function item; obtaining an adjustment policy corresponding to the running state of the adjustment function item, wherein the adjustment policy is used for adjusting a touch screen sensitivity threshold of the mobile terminal; and according to the obtained adjustment policy,adjusting a maximum value and a minimum value of the sensitivity threshold. The interference of the frequency of touch screen sensitivity on the frequencies of other function items of the mobile terminal can be avoided.

The embodiment of the invention relates to a frequency control method and device, a radio frequency system and communication equipment, and the method comprises the steps: obtaining the transmitting power of a power amplifier when the power amplifier is in a working state, and determining a power level corresponding to the transmitting power; and controlling a voltage converter to be switched to aworking frequency corresponding to the power level, wherein the voltage converter is used for supplying power to the power amplifier at the working frequency. Through the steps, the working frequencyof the voltage converter can be effectively adjusted according to the running state of the communication system and the responded transmitting power, so the cross-modulation interference phenomenon in the communication system and the voltage converter is inhibited, the communication quality of the communication system is improved, and the communication experience of a user is improved.

The invention provides a graphene-based optical carrier microwave antenna, which is composed of a metal grounding plate, an insulating dielectric layer, a metal structure layer, a graphene film patchand an optical waveguide. The metal structure layer comprises a microstrip connecting line, an impedance matching transmission line and a radiation patch. According to the antenna, when signal light irradiates the graphene patch, the conductivity of graphene is changed along with the intensity of the signal light, so that an optical signal is converted into a microwave radiation signal. Accordingto the antenna, the optical adjustability of the graphene is utilized, the high electron mobility of the graphene and the resonance property of the metal antenna structure are combined, optical signals can be directly converted into microwave signals without photoelectric signal conversion, the hardware structure is simple, the speed is high, the size is small, and the antenna can be applied to high-speed wireless communication.

The invention provides a multifunctional integrated oxygen sensor, which comprises a straight through pipe, two ultrasonic probes and a control module, wherein the ultrasonic probes are arranged on the straight through pipe, and are electrically connected with the control module, the control module comprises a main control circuit, a pressure acquisition module, a temperature and humidity detection module, a micro-pressure detection module and a wireless Bluetooth data transmission module, the main control circuit is electrically connected with the pressure acquisition module, the temperature and humidity detection module, the micro-pressure detection module and the wireless Bluetooth data transmission module, and the main control circuit, the pressure acquisition module, the temperature and humidity detection module, the micro-pressure detection module and the wireless Bluetooth data transmission module are integrated on the same circuit board. The multifunctional integrated oxygen sensor has the functions of detecting the oxygen concentration, the oxygen concentration and the temperature of the oxygen generator, detecting the pressure, the temperature and the humidity of the oxygen storage tank, detecting the pressure of an air outlet and the like at the same time, multiple functions are integrated through the multifunctional integrated oxygen sensor, and the manufacturing cost is reduced.

The invention discloses a small ultra-wideband different-plane mirror image dipole array antenna, which comprises a top-layer stepped comb-shaped structure printed line, a top-layer triangular printedline, a middle microwave dielectric material layer, a bottom-layer stepped comb-shaped structure printed line and a bottom-layer triangular printed line at the end part of the bottom-layer stepped comb-shaped structure printed line, wherein the top-layer triangular printed line, the middle microwave dielectric material layer and the bottom-layer stepped comb-shaped structure printed line at the end part of the top-layer stepped comb-shaped structure printed line; the top-layer stepped comb-shaped structure printed line and the bottom-layer stepped comb-shaped structure printed line are in different-surface mirror symmetry in structure to form different-surface dipoles of the array antenna; by linearly increasing or decreasing the number of dipole pairs with different arm lengths on the basis of the different-plane dipoles, the working bandwidth of the whole antenna can be adjusted, and the consistency of a radiation pattern can be kept; and the radiation pattern of the array antenna is parallel to the axial direction of the antenna. The antenna adopts a common PCB dielectric material, can be processed and manufactured more conveniently, and has the advantages of small size, adjustable frequency, good directional diagram consistency in the whole working frequency band, axial radiation direction and the like, thereby showing that the antenna has a wider application prospect.

The invention discloses a biomass particle temperature-increasing and freeze-proofing system for a heliogreenhouse. The system comprises a fuel feeding machine, a combustion machine and a heat exchange device, and the fuel feeding machine, the combustion machine and the heat exchange device are integrally formed. According to the system, feeding, air blowing and air inducing equipment can be adjusted, and heat can be sufficiently collected and diffused under the condition of low energy consumption; hot air collection and circulation with small-load combustion, large-area heat exchange, multi-point-location collection and full-coverage circulation is achieved so that heat dissipated by combustion, exchange and circulation devices can all be collected into a circulating system and quickly diffused to all directions of the heliogreenhouse; the utilization rate of the heat is effectively increased, the loss amount of the heat is reduced, a new way for standardized and routinized application of biomass particle fuel in temperature-increasing and freeze-proofing procedures of the heliogreenhouse is put forward, organic combination of ecology, environmental protection and circulation of modern facility agriculture is achieved, and the advancement level takes the lead in China.

The invention relates to a spray driving device and a spray system. The spray driving device is used for driving the piezoelectric material of a spray module; the spray driving device includes a driving circuit, a control circuit and a feedback circuit; when the control circuit controls the driving circuit to drive the piezoelectric material with a driving frequency, the feedback circuit detects electrical data fed back by the piezoelectric material and transmits the electrical data to the control circuit; and the control circuit controls the driving circuit to drive the piezoelectric material with a working frequency according to the electrical data. With the spray driving device of the invention adopted, the working frequency of a sprayer can be automatically adjusted and tracked, so that the spray effect of the sprayer can be optimized; when the piezoelectric material of the sprayer is damaged, it only needs to replace an old spray module with a new spray module, and it does not need to abandon the whole sprayer; and as for the new spray module, the sprayer will automatically adjust the working frequency, so that the spray effect of the sprayer can be optimized.