122results about How to "Change the output power" patented technology

The invention discloses a system and a method provided with calibration transmitting and receiving channels for real-time monitoring of multichannel transmitting and receiving delays. The method comprises the following steps of measuring a sum of closed loop delays of a calibration transmitting channel and a calibration receiving channel, and subtracting an absolute delay of the calibration transmitting channel from the sum of the closed loop delays to obtain an absolute delay of the calibration receiving channel; measuring a sum of the closed loop delays of a reflector inter-satellite link transmitting channel and the calibration receiving channel and a sum of the closed loop delays of a phased array inter-satellite link transmitting channel and the calibration receiving channel, and subtracting the absolute delay of the calibration receiving channel from the sums of the closed loop delays to obtain absolute delays of the reflector inter-satellite link transmitting channel and the phased array inter-satellite link transmitting channel; and measuring a sum of the closed loop delays of the calibration transmitting channel and a reflector inter-satellite link receiving channel and a sum of the closed loop delays of the calibration transmitting channel and a phased array inter-satellite link receiving channel, and subtracting the absolute delay of the calibration transmitting channel to obtain absolute delays of the reflector inter-satellite link receiving channel and the phased array inter-satellite link receiving channel. According to the system and the method, the real-time monitoring of the multichannel transmitting and receiving delays is realized, and the system and the method have the characteristic that the measured absolute delays of the transmitting channel and the receiving channel are accurate.

When a position detector detects that the position of a spot on a projection plane designates a non-projection region, the level of a driving signal of a laser is corrected. Specifically, the correlation between the quantity of laser light detected by a light-receiving portion and the level of the driving signal of the laser in accordance with prescribed data is detected. Then, the characteristic value of the laser indicated by the detected correlation is compared with the characteristic value at room temperature stored beforehand to indicate the correlation between the quantity of light emitted by the laser at room temperature and the level of the driving signal. Then, based on the comparison result, the level of the driving signal of the laser in accordance with image data is corrected.

The invention discloses an electro-hydraulic system for recycling and releasing the potential energy of an engineering machinery. The electro-hydraulic system comprises a control system, a power source, a performing mechanism, a switching mechanism and an energy recycling releasing mechanism, wherein the control system comprises a controller, a first pressure sensor, a second pressure sensor, a third pressure sensor and a fourth pressure sensor; the power source comprises an engine, a main variable pump and an oil tank; the performing mechanism comprises a lifting hydraulic cylinder; the switching mechanism comprises a multiway valve and a pilot control handle; and the energy recycling releasing mechanism comprises an energy accumulator, a first liquid control two-position three-way valve, an electromagnetic two-position three-way valve and a variable pump-motor. With the adoption of the electro-hydraulic system for recycling and releasing the potential energy of the engineering machinery, when the working condition of the engineering machinery is down, a lot of gravitational potential energies can be recycled and is used for driving the main pump, so that the consumption power of the engine is lowered, the energy waste is reduced, and the work efficiency of the engineering machinery is improved.

The invention relates to a direct fuel cell energy storage and supply system, and in particular relates to a parallel direct fuel cell energy storage and supply system based on a liquid hydrogen storage material. The system comprises a fuel cell single unit and an electrochemical hydrogenation device single unit and is characterized in that a water inlet on the electrochemical hydrogenation device single unit is connected with one end of a water inlet pipe; a hydrogen storage material input hole on the electrochemical hydrogenation device single unit is communicated with the bottom of a hydrogen storage material tank by a hydrogen storage material input pipe; a hydrogen storage material hydride outlet on the electrochemical hydrogenation device single unit is communicated with a hydrogen storage material hydride tank by a hydrogen storage material hydride output pipe; a hydrogen storage material outlet on the fuel cell single unit is communicated with the hydrogen storage material tank by a hydrogen storage material output pipe; a hydrogen storage material hydride input hole on the fuel cell single unit is communicated with the hydrogen storage material hydride tank by a hydrogen storage material hydride input pipe; and the hydrogen storage material tank is filled with the hydrogen storage material which is multi-element mixed liquid unsaturated heterocyclic aromatic hydrocarbon. The system not only simplifies the devices (has simple structure) but also greatly improves the safety.

The invention discloses a composite power control system of an impedance self-matching induction heating inverter power supply, and belongs to the technical field of inverter power supply power control. The composite power control system solves the problem of low power supply efficiency because the existing induction heating inverter power supply cannot meet the heating impedance matching requirements of different materials, different coils and different working conditions. The composite power control system of the power supply comprises a power adjusting system and a factor angle control system, wherein the power adjusting system adjusts the power instruction and the fed-back actual power by means of power adjustment, voltage adjustment and current adjustment to obtain a chopping triggersignal; and the power factor angle control system processes an inverter voltage signal and an inverter current signal to obtain an actual power factor angle feedback signal of the system and then generates an inverter control frequency instruction signal, and the inverter control frequency instruction signal is input into a single-phase full-bridge inverter circuit after being subjected to inversion trigger control. The composite power control system is suitable for power control of the inverter power supply.

This invention relates to a wireless sound box wire less connected to audio visual product. Wherein, the audio signal from the audio visual product first passes the audio amplifier circuit and then the PWM circuit; the LED outputs infrared signal; arranging an infrared signal receiving circuit on the said box with back end connected with finite amplifier circuit and power amplifier circuit that drives the horn of the said box by turns. The invention has large power and less distortion and the volume is easy to regulate.

The invention discloses a silicon-based external cavity laser with adjustable wavelength and power and relates to the field of integrated optics of optical communication. The silicon-based external cavity laser is characterized in that the output end of a light source is connected with a first silicon-based optical coupler, the first silicon-based optical couple is connected with a first multimode interferometer, the first multimode interferometer is connected with a first silicon-based microloop filter and a second silicon-based microloop filter, a second multimode interferometer is arranged between the first silicon-based microloop filter and the second silicon-based microloop filter, the second multimode interferometer is provided with two output ends, and one output end is connected with the second silicon-based microloop filter while the other serves the output of the entire silicon-based external cavity laser; the silicon-based external cavity laser further comprises an asymmetric Mach-Zehnder interferometer which is arranged between the first silicon-based microloop filter and the second silicon-based microloop filter; thermal resistance is loaded on the two silicon-based microloop filters and the asymmetric Mach-Zehnder interferometer. By the arrangement, the adjustable wavelength and power is realized, and range of application of the tunable laser is increased.

PURPOSE: A control method of a heater for a drier and an apparatus thereof are provided to control the heater safely by operating the heater in rotating a blower motor over the reference speed, and to improve the reliability by preventing breakage or damage with restricting wrong operation. CONSTITUTION: A heater control apparatus for a drier is composed of a blower forming flow of air circulating in a drum; a heater heating air to supply hot blast to the drum; a speed detecting unit(300) detecting rpm of the blower; a comparator(320) comparing rotational speed from the speed detecting unit with the normal speed of the blower, and outputting a signal for driving the heater; and a control unit controlling the drier and operating the heater by outputting the driving signal. The reliability is improved by operating the heater in applying the heater control signal to the heater driving unit from normal operation of the blower motor.

The invention provides an active power-factor correction circuit device which comprises a segment linear gain circuit, an error amplifier, a pulse width modulation controller and a pulse width modulation signal generator. The segment linear gain circuit is used for receiving feed-forward signals and generating corresponding gain signals, wherein sizes of the gain signals and sizes of the feed-forward signals are correlated in a broken line mode. The error amplifier is used for generating error signals according to output voltage of an alternating-current-to-direct-current converter. The pulse width controller is used for generating control signals according to the gain signals, the error signals, and the output voltage after being rectified of the alternating-current-to-direct-current converter. The pulse width modulation signal generator is used for generating pulse width modulation signals used for controlling a power switch of the alternating-current-to-direct-current converter according to the control signals. As a segment linear gain circuit is utilized to replace a traditional squarer, circuit complexity of an active power-factor correction circuit can be lowered, needed bias voltage sources are reduced, a circuit area is reduced, and electricity power consumption and cost are lowered.

The invention provides a laser bird-repelling device, and relates to the field of power sector overhead transmission line bird-repelling technologies. The laser bird-repelling device solves the problems that after an existing transmission line bird-repelling device is used for a period of time, birds can adapt to the device, and therefore the bird-repelling effect becomes worse; meanwhile the birds are prone to injury and death due to the existing bird-repelling device. A laser emission unit emits arc laser spots, a light control module controls laser output power through illumination intensity acquired by a photoelectric inductive sensor, a pitching motor is used for driving the laser emission pitching angle of a laser device, an azimuth-drive motor is used for driving the laser device to rotate in the horizontal plane, and the working state of the pitching motor and the working state of the azimuth-drive motor are controlled by an upper computer. The laser bird-repelling device is suitable for repelling the birds on an overhead transmission line.

The invention relates to a double-speed four-power energy-saving three-phase asynchronous motor, the electromagnetic scheme design combines multi-power electromagnetic winding technology and multi-speed motor novel phase interchanging pole changing electromagnetic winding technology to form a novel motor winding 3Y + Y/3Y connection technical scheme, and by switching by a control cabinet, double-speed and four-power are realized on one motor, thus satisfying special using requirements of different loads and adjusting parameters (changing stroke times) of a well pumping unit. The technology of double-speed and four-power realized on one motor product not only solves the problem that a strong horse pulls a small cart, namely the well pumping unit uses one motor to pump oil, but also changes the stroke times of the well pumping unit. The product is widely suitable for power transmission of a walking beam or belt well pumping unit.

The invention provides a piezoelectric-modulation vertical cavity semiconductor laser structure comprising a single crystal substrate (1), a buffering layer (2), an n-type DBR reflecting mirror (3), a carrier lower limiting layer (4), a gain region (5), a carrier upper limiting layer (6), a photoelectric limiting layer (7), a p-type DBR reflecting mirror (8), an ohmic electrode contact layer (9), a first transparent electrode (10), two second metal layers (11), an SiO2 antireflection film (12), two SiN insulation layers (13), a second transparent electrode (14), two third metal layers (15) and a first metal layer (16). During powering operation, the cavity of a vertical cavity semiconductor laser deforms to different extents through the piezoelectric characteristics of the SiO2 antireflection film, and the piezoelectric-modulation of the output power of the vertical cavity semiconductor laser can be implemented.

The invention relates to a direct fuel cell energy storing and supplying system. An integrated direct fuel cell energy storing and supplying system based on a liquid hydrogen storage material is characterized in that an electrochemical hydrogenation device monomer and a fuel cell monomer are integrated, a working medium inlet of the fuel cell monomer is communicated with a first port of a second three-way valve by a first working medium pipe, a second port of the second three-way valve is communicated with the bottom of a hydrogen storage material hydride tank by a second working medium pipe, a third port of the second three-way valve is communicated with the bottom of a hydrogen storage material tank by a sixth working medium pipe, a working medium outlet of the fuel cell monomer is communicated with a first port of a third three-way valve by a fifth working medium pipe, a second port of the third three-way valve is communicated with the hydrogen storage material hydride tank by a fourth working medium pipe, a third port of the third three-way valve is communicated with the hydrogen storage material tank by a third working medium pipe, and the hydrogen storage material tank contains a hydrogen storage material which is multivariate mixed liquid unsaturated heterocyclic aromatic hydrocarbon. According to the integrated direct fuel cell energy storing and supplying system, not only is the device (with a simple structure) simplified, but also the safety is greatly improved.

The invention is an air-distributing mechanism of air-driven automobile engine, mainly including cylinder end, air inlet valve and exhaust valve, where the cylinder end has two parallel-separated columnar holes and air inlet channel and exhaust channel, the air inlet valve and the exhaust valve are set in the two columnar holes, respectively and rotationally cooperate with them, two ends of the air inlet valve are installed with seal washers, respectively, the valve body between the two seal washers has U-cross section to compose the cavity of the air inlet valve, there is an exhaust notch corresponding to the exhaust channel on the exhaust valve, and there is a gear engaging the two valves on one end where the two valves extend out of the columnar hole. It can ensure the maximum pressure occurs at the top stop point in the cylinder, effectively reduce throttling and flowing losses, and largely enhance the economic property of the automobile engine.

The invention provides a power regulation circuit for a load. The power regulation circuit comprises a dynamic frequency adjustment circuit, an electrical level reproduction circuit, a reproduction ratio setting circuit, a sampling comparison circuit and a PWM generator. The dynamic frequency adjustment circuit receives a first clock signal and a variable frequency control signal to generate a second clock signal. The electrical level reproduction circuit generates an electrical level reproduction detection signal according to the second clock signal, wherein the high electrical level of the second clock signal is duplicated to the high electrical level of the electrical level reproduction detection signal. The reproduction ratio setting circuit sets the reproduction ratio of time of duration of reproduction from the high electrical level of the second clock signal to the high electrical level of the electrical level reproduction detection signal according to the frequency modulation current, wherein the reproduction ratio is smaller than 1:1. The sampling comparison circuit compares the electrical level reproduction detection signal and a current sustain signal to generate the variable frequency control signal and feeds back to the dynamic frequency adjustment circuit. The PWM generator generates a PWM signal based on the second clock signal.