38 results about "Power control" patented technology

To provide a wireless sensor system, in which an abnormal power supply in the power supply section can be ascertained, for avoiding a malfunction of the system and accomplishing a stable power supply with reduction of the consumption of a power being transmitted, the wireless sensor system includes wireless sensor units and a sensor signal receiving unit. The wireless sensor units include a sensor section for detecting a detection object, a sensor signal transmitting section for transmitting by wireless a sensor signal from the sensor section, and a power supply section having a power receiving section for receiving a driving power transmitted by wireless. In this system, a power supply monitoring section is provided for monitoring the voltage of the power supply section. The sensor signal receiving unit includes a monitor dependent power control section for regulating the power to be transmitted, depending on a monitored result of the power monitoring section.

The invention discloses a method and device for controlling uplink power. The method comprises the steps of: calculating downlink path loss of a mobile station in a service cell; calculating path loss of the mobile station to an adjacent cell; calculating path compensating transmitting power of the mobile station according to the downlink path loss of the mobile station in the service cell and the path loss of the mobile station to the adjacent cell; and obtaining basic open loop transmitting power of the mobile station according to the path compensating transmitting power of the mobile station. According to the technical scheme provided by the invention, the system frequency spectrum efficiency and the cell edge user frequency spectrum efficiency can be simply and effectively combined.

A wireless power transmission system includes a power transmission apparatus, a power reception apparatus, a load driving apparatus, and a power control apparatus. The power control apparatus includes a direct current power supply, a main control circuit, and a communicator. Each time an operation load to be achieved by the load driving apparatus changes, the main control circuit updates a load instruction value for the load driving apparatus and a control parameter for adjusting a voltage of first alternating current power, the control parameter being used by the power transmission apparatus to convert first direct current power into the first alternating current power. The power transmission apparatus includes an inverter circuit and a power transmission control circuit that determines the voltage of the first alternating current power on the basis of the control parameter updated by the power control apparatus and that controls the inverter circuit.

The embodiment of the invention discloses an establishing method and system of a trust chain. The method comprises the steps of starting a BMC module and a TCM module before a server is powered on; adopting the TCM module to scale BMC firmware in the BMC module to obtain a first scaling result, and judging whether or not the BMC firmware is tampered according to the first scaling result; if the BMC firmware is not tampered, adopting the BMC firmware to scale BIOS-Boot-Block to obtain a second scaling result, and judging whether or not the BIOS-Boot-Block is tampered according to the second scaling result; if the BIOS-Boot-Block is not tampered, controlling a power control module to power on the server, and adopting a BIOS to establish the subsequent trust chain. According to the establishing method and system of the trust chain, the safety of the trust chain is improved when the trust chain is established, and accordingly the safety of the system is improved.

The present invention provides a method for improving the reliability of a channel quality indicator (CQI) message in a wireless communications network begins with receipt of the CQI message. The CQI message is then decoded, and a decision metric value for each symbol in the CQI message is computed. A largest decision metric value and a second largest decision metric value for the CQI message are determined. The reliability of the CQI message can be determined by comparing the two largest decision metric values. This method may be applicable to high-speed downlink packet access in time division duplex, frequency division duplex, or other modes of transmission.

Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband.

The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

The invention discloses an Internet two-dimensional code intelligent lock and a using method thereof in hotel management. The Internet two-dimensional code intelligent lock comprises a processor, and a two-dimensional code recognition module, a face recognition device, a wireless communication module, a Bluetooth module, a power module, a clock module, an electric control lock and a recognition error alarming device which are connected with the processor, and further comprises a storage battery connected with the power module, wherein the wireless communication module is connected with a user terminal and a management terminal respectively through a server; the two-dimensional code recognition module comprises an image recognition unit and a power control unit which are connected with each other; the image recognition unit is connected with the processor. The management terminal is matched with locks through the serve and updates unlocking two-dimensional codes, and in different time periods, different locks correspond to only encrypted codes in different time periods. The Internet two-dimensional code intelligent lock can automatically acquire room renting information statistically, and customers can choose rooms by themselves, so that information is transparent and the safety management of a hotel is effectively enhanced.

The invention relates to a CSI based omnidirectional detection method suitable for the indoor environment. A traditional WiFi based indoor personnel detection scheme tends to use RSSI (Received Signal Strength Indicator) information, and common commercial AP and WiFi terminals can measure the RSSI information conveniently but have defects including large granularity and low time stability. According to the method of the invention, CSI replaces RSSI information, advantages including high time stability, high resistance to dynamic environment interference and high sensitivity to link around staff of the CSI are utilized, a power control machine based on a network interface card of the Intel 5300 series is used in the indoor environment, a fingerprint matching method is used, and indoor omnidirectional passive personnel sensing is realized. The method of the invention can be used to improve the personnel detection accuracy in the indoor environment and realize omnidirectional personnel detection in the indoor environment.

The present invention relates to a power control method and device. The method comprises: a base station separately determining, according to terminal types of n currently scheduled terminals, error vector magnitude (EVM) index adjustment parameters of the n terminals; processing signals to be transmitted of the n terminals according to the EVM index adjustment parameters of the n terminals so as to obtain output signals, and determining the total power change of the output signals with respect to the signals to be transmitted; and dynamically controlling a power voltage of a power amplifier according to the total power change of the output signals with respect to the signals to be transmitted. By means of the power control method and device provided in embodiments of the present invention, different processing is performed on signals of different terminals, the balance between the total power of an OFDM system, the EVM, and the efficiency of the power amplifier is achieved, and system performance of the OFDM system is improved.

The invention provides a nano-porous material pore channel inner surface plasma modification treatment method. The method comprises the step that a nano-porous material is treated in different atmospheres in a normal-temperature and atmospheric-pressure dielectric barrier discharge mode, wherein the output power is controlled to range from 80 w to 110 w, the treatment time ranges from 20 min to 40 min, the alternating current power supply amplitude ranges from 30 KV to 50 KV, and the frequency can be adjusted between 5 KHz and 20 KHz. The nano-porous material treated with plasma is subjected to organic functional modification in pore channels, and the modified nano-porous material can serve as an efficient adsorption material; when the nano-porous material treated with plasma is subjected to metal loading, the metal-loaded nano-porous material can serve as an efficient catalyst.

A method for controlling electrical power consumption for a first group of functional which can be used for operational management during operation of the bioreactor components during operation comprises, inter alia, adjusting a present power control signal for one or more of the functional components from the first group in order to optimise power consumption, when a comparison shows for the first group of functional components that the currently required total electrical power consumption is greater than a predefined total electrical power consumption, such that, for the first group of functional components, an adjusted total electrical power consumption is not greater than the predefined total electrical power consumption. A biotechnological apparatus comprises a bioreactor, a reactor vessel formed in the bioreactor and having a cultivation chamber, and a temperature control device provided with a heat pump and configured to control the temperature of the cultivation chamber.

The invention provides improved control of a power transmission system having a first group of measurement units in a first geographical area providing a first set of phasors and a second group of measurement units in a second geographical area providing a second set of phasors, where the phasors in the sets are generated at the same instant in time. In this system the power control device includes a phasor aligning unit that time aligns the first and second sets of phasors and a control unit that compares each set of phasors with a corresponding phasor number threshold, determines that a first control condition is fulfilled if each phasor number threshold has been exceeded and enables the provision of a common signal if the first control condition is fulfilled. The common signal is based on the obtained phasors in the first and second sets.

The invention provides a mobile video monitoring system based on cognitive radio. The mobile video monitoring system comprises a control center and a mobile terminal. The control center is wirelessly communicated with the mobile terminal through an ISM frequency band. The control center is used for monitoring communication quality and determining whether spectrum sensing and channel switching need to be carried out or not according to the communication quality. If data transmission between the mobile terminal and the control center cannot be recovered through the channel switching, the data transmission of the mobile terminal is relayed through a relay robot. The invention further provides a mobile video monitoring method. According to the mobile video monitoring system and the method, the unfixed communication frequency band is adopted, and in the ISM frequency band, channel interference is automatically sensed and avoided, and the interference problem is solved. The wireless signal fading problem is solved through power control and relay transferring, and therefore the real-time performance and reliability of video transmission are guaranteed. The mobile video monitoring system and the method do not depend on the coverage of the commercial wireless network, and have actual application significance in video monitoring in the emergency environment, the severe environment and the unknown environment.

The invention discloses a digital trunked system down power control method based on an enhanced multimedia broadcast multicast service (eMBMS). The digital trunked system down power control method includes that a single frequency network is divided into N power areas, and an initial sending power is arranged on each power area, each power area corresponding to the initial sending power is added in accordance with a central area of a community to an edge area of the community in sequence, the N is an integer which is greater than 2 or equal to 2; according to distributed situations of users in each power area, a down link initial sending power is ensured; according to changes of the maximum road damage of the users, the down link sending power is in tiny adjustment. With the help of the technical scheme, the initial sending power of the trunk service down link can be ensured quickly. And power changes of the users can be followed the tracks effectively. User experience is promoted. The invention further discloses a digital trunked system down power control device based on the eMBMS. The digital trunked system down power control device based on the eMBMS comprises a power area divided module, a down power determination module and a power adjustment module.

A memory apparatus may include a bit line sense-amplifier coupled to first and second bit lines; a first precharge unit suitable for coupling the first and second bit lines in response to a bit line equalization signal; a sense-amplifier power control unit suitable for providing a plurality of powers to the bit line sense-amplifier in response to a power control signal; and a second precharge unit suitable for individually changing each voltage level of the first and second bit lines based on a precharge control signal.

The invention discloses a DFIG impedance remodeling control method and a DFIG impedance remodeling control system without phase-locked loop direct power control. The impedance remodeling control method comprises the following steps: analyzing DFIG impedance high-frequency capacitance characteristics of phase-locked loop-free direct power control according to an equivalent single-input single-output impedance Bode diagram; according to DFIG impedance high-frequency capacitance characteristics of phase-locked-loop-free direct power control, analyzing the generation reason and parameter sensitivity of high-frequency resonance through a DFIG high-frequency simplified model; according to the relationship between the frequency coupling characteristic intensity and the DFIG phase margin of the phase-locked loop-free direct power control, introducing voltage feedforward virtual impedance to carry out DFIG impedance remodeling, and carrying out parameter design; according to the equivalent single-input single-output impedance Bode diagram, analyzing the DFIG phase margin and the remodeling effect after the voltage feed-forward virtual impedance is added. According to the invention, the frequency coupling characteristic of the DFIG system is reduced, the phase margin of the DFIG under the inductive weak power grid is improved, and the high-frequency resonance is inhibited.

The invention discloses an anti-saturation current mode control radio frequency power amplifier. The anti-saturation current mode control radio frequency power amplifier comprises a pre-amplifier, a power output stage, a voltage-current conversion circuit, a current error amplifier and an anti-saturation circuit, the power output stage is used for performing power amplification on a pre-amplifiedradio frequency signal under the control of the control voltage to obtain output power; and the current flowing through the power transistor in the power output stage is sampled. And the voltage-current conversion circuit is used for converting the control voltage into reference current in direct proportion to the control voltage. And the current error amplifier is used for comparing the samplingcurrent with a reference current to obtain a comparison current and providing the comparison current to the pre-amplifier. And the anti-saturation circuit is used for feeding back the output end of the current error amplifier to the first input end of the current error amplifier or feeding back to the control voltage input end. The application has the characteristics of accurate power control andsaturation resistance.

The invention discloses a wheeled leg walking device with independent walking and cross-country functions. The wheeled leg walking device comprises a power control assembly for use in walking control and power output, a plurality of leg root assemblies uniformly surrounding the periphery of the power control assembly, a foot sole assembly which is connected with the leg root assembly through a shaft and is used for supporting during walking, a steering control mechanism which is connected between the power control assembly and the foot sole assembly and is used for controlling turning, as well as an air bag and an air pump which are connected to the power control assembly through a rotary bearing and are used for providing buoyancy force for the wheeled leg walking device walking in water, wherein under the action of the buoyancy force generated after inflation of the air bag, the power control assembly floats over the liquid surface. By adopting the wheeled leg walking device, the cross-country capability of a walking mechanism is enhanced greatly; meanwhile, the complexity of the mechanism is lowered. The wheeled leg walking device can be used separately, and can be taken as a walking unit of a motion platform. The wheeled leg walking device has the advantages of high transmission efficiency, stability in running and high speed, and can be applied to the fields of disaster relief, exploration, military affairs and the like.

A high power control system includes: a single energy source; an energy source management unit configured to manage the energy source; a controller configured to output a PWM control signal under control of the energy source management unit; a plurality of inverters configured to convert a direct current into an alternating current under control of the PWM control signal of the controller; a plurality of filters coupled to output terminals of the inverters; and a plurality of switches configured to regulate connections between the filters and a load under control of a regulation control signal of the controller.

A cellular phone includes an inner loop portion and an outer loop portion both for conducting power control. The outer loop portion includes a timer counter. The timer counter transmits a timing signal to a communication quality comparing section when a set length of time elapses. The communication quality comparing section compares a block error rate (BLER) of received data with a target BLER even when a predetermined amount of data has not been received. When the BLER of the received data is equal to or higher than the target BLER, a target signal to interference power ratio (SIR) is decreased. Accordingly, the cellular phone can decrease the target SIR even when the amount of the received data is small, and no request for an unnecessarily high transmission power is made to a base station.

The invention relates to a microwave heating dryer with adjustable power. At least two microwave radiation circuit units are installed in the dryer. Each microwave radiation circuit unit consists of a contactor, a high-voltage transformer and a corresponding set of three magnetic The three input coils of the high-voltage transformer are connected to the three output terminals of the contactor correspondingly, and the three output coils of the high-voltage transformer are correspondingly connected to the above three magnetrons. In each microwave radiation circuit unit, at least one The electromagnetic coil of the contactor of the microwave radiation circuit unit is connected with a power controller circuit for intermittent power supply. It can effectively improve the reasonable matching between the microwave output power and the load, improve the energy utilization rate and (heating) drying quality; at the same time, it is convenient to realize the control of the total power of (heating) drying, so as to facilitate the processing of different types of materials and different treatments. Reasonable operation of the microwave (heating) dryer under certain circumstances.

The invention provides an uplink open-loop power control method and device and communication equipment, and belongs to the technical field of wireless communication. The uplink open-loop power controlmethod is applied to network side equipment, and comprises the following steps: receiving a sounding reference signal SRS reported by a user terminal, and determining a target reference signal estimated by using downlink path loss according to the information of the SRS reported by the user terminal; indicating the target reference signal to the user terminal through downlink control informationDCI. Through the method disclosed in the technical scheme of the invention, the accuracy of uplink open-loop power control can be improved, the overhead caused by RRC frequent reconfiguration is reduced, and the uplink throughput of the user terminal is effectively improved.

Apparatus, and an associated method, for effectuating power control in a radio communication system, such as an IS-95/IS-2000 system which deploys 1×EV-DO technology. At a mobile station, a channel indicia measurer measures channel conditions upon a radio link. Responsive thereto, a data rate selector selects a data rate at which subsequent data is to be communicated to the mobile station. The selection is returned to the network part of the communication system. A selector selects the power level at which to communicate the subsequent data to the mobile station responsive to the requested data rate. The requested data rate is used as a metric by which to select the power level at which to communicate the subsequent data to the mobile station.

The invention particularly relates to a method for switching a vector mode and a scalar mode in high-power motor control, which solves problems that over-current occurs easily in existing high-power motor control, the service life is reduced, and that the reliability of the whole system is poor. The method is characterized comprising the steps that a, when a motor speeds up, the modulation degree is increased to a limitation threshold value M1, and the control mode transits from the vector mode to the scalar mode; b, when the motor speeds down, the modulation mode gets into 3-frequency-division modulation from a square wave mode, then the control mode transits from scalar control to vector control; c, the modulation mode is switched firstly, the modulation degree reduces to acquire the modulation degree M3 as soon as getting into 3-frequency-division, wherein the modulation degree M3=Mmax-Mdelta-Mhyster; and d, after the modulation mode gets into 3-frequency-division, lux linkage gradually decreases to a normal threshold value Phim2, the control mode is switched from scalar control to vector control. The method provided by the invention prolongs the service life of the motor, and shortens the test period at the same time.

The invention relates to a hydraulic machine, in particular to a hydraulic machine provided with a device for inner hole finish machining through a steel ball (3). The hydraulic machine comprises the device for inner hole finish machining and a hydraulic table (6). The device for inner hole finish machining comprises a hydraulic head (2), a clamp (5) and the steel ball (3), the device for inner hole finish machining is installed on the working face of the hydraulic table (6), the hydraulic head (2) is installed in the middle of a hydraulic machine body (1) and corresponds to the device for inner hole finish machining, the stamping end is in an inwards-concave arc shape and is coincident with the surface of the steel ball (3) in radian, the clamp (5) is in a hollow U shape and is beneficial to placement of a workpiece (4) and extruding work of the steel ball (3), the steel ball (3) is placed on an inner hole of the workpiece (4) to be stamped by the hydraulic head (2), and a hydraulic pressure gauge and a motor are installed inside the hydraulic table (6) to serve as power control of the hydraulic head (2). The original requirement of hole finish boring for a cutter and a machine tool is replaced, the machining number at unit time is one time higher than the machining number of hole finish boring at unit time, the quality of machined products, particularly the roughness, is higher than that of hole finish boring, the yield is improved, and the production effect is improved.