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33results about How to "High power accuracy" patented technology

High-accuracy high-linearity high-temperature-stability dynamic calibration source system

The invention relates to a linear dynamic calibration source system, in particular to a high-accuracy high-linearity high-temperature-stability dynamic calibration source system. According to the high-accuracy high-linearity high-temperature-stability dynamic calibration source system, automatic gain control of a power level is achieved by using of a negative feedback loop. Power output in a large dynamic range is achieved by using of an electronic stored program control attenuator. In an automatic gain control loop circuit, high accuracy degree of power is achieved by using of a synchronous real-time compensating radio frequency detector, linear compensation and temperature compensation. High-linearity output of the power is achieved in the whole dynamic range, and consistency of the power output in the whole working temperature range is ensured.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD

Intermediate-frequency detection based vector network analyzer power control method

The invention discloses an intermediate-frequency detection based vector network analyzer power control method. An excitation source is divided into two paths by couplers, one path serves as testing signals which are outputted through a port via the couplers, the other path serves as reference signals which are in frequency mixing with a local oscillator, outputted intermediate-frequency signals are divided into two paths, the intermediate-frequency signals in one path enter a receiver for network parameter calculation, the intermediate-frequency signals in the other path are integrated with control voltage by means of band-pass filtering, intermediate-frequency detection and logarithmic amplification, output of an integrator is fed back to a variable attenuator in the excitation source, and accordingly, a closed-loop automatic level control link is formed among the excitation source and the intermediate-frequency signals .
Owner:CHINA ELECTRONIS TECH INSTR CO LTD

Indirect heating terminal type microwave power micro-mechanical sensor and preparation method thereof

The invention discloses indirect heating terminal type microwave power tiny machine sensor and its producing method, it is the product and method which uses terminal load type to achieve power-quantity of heat-voltage transferring to detect microwave power. There are coplane wave-guide and thermopile set on the underlay, and terminal resistance are set on them, a contact pads is set on the outer end of the thermopile; The producing method of the invention is: epitaxial growing GaAs on the underlay, mixing AlGaAS at the same time; photolithography AlGaAs and getting thermal couple arm, sending metal layer Ni / AuGe, and curving metal layer, annealing and getting contact area, depositing SiON dielectric layer, and photolithography, curving to get interconnection dactylopore of thermopile, depositing Au and photolithography coplanar wave-guide and metal interties; curving to get terminal resistance, photolithography and curving dielectric layer, to get insulating dielectric layer between terminal resistance and thermopile.
Owner:SOUTHEAST UNIV

Controllable power supply device with step-up function

A controllable power supply device with a step-up function including a constant voltage generator, a programmable voltage generator, a first switch and a linear regulator is provided. The constant voltage generator is used to provide an initial voltage. The programmable voltage generator is used to receive the initial voltage and adjust the received initial voltage to boost the initial voltage to a power supply voltage. The first connecting terminal of the first switch is used to receive the initial voltage, the second connecting terminal of the first switch is used to receive the power supply voltage, and the third connecting terminal of the first switch is coupled to one of the first connecting terminal and the second connecting terminal. Therefore, the voltage from the third connecting terminal of the first switch is stabilized and is outputted as the output voltage of the controllable power supply device by the linear regulator.
Owner:ASUSTEK COMPUTER INC

Controller for oscillation center of electric vibration table with barometrial compensation control

The invention disclose an electrodynamic vibration table vibrating centre control device with air pressure compensate control, which includes a static controller and a dynamic controller, and the invention is characterized in that the control device also includes an air pressure compensate control circuit, the circuit detects moving coil gasbag gate or air pressure in air cell through the baroceptor and outputs voltage signal which reflects air pressure value, the voltage signal is divided into two signals after the AC signal is filtered by the filter circuit: one signal goes through the voltage latch circuit, the other signal goes through the inverting circuit, two signals are superposed by the supercircuit and inputted into the static controller by a compensate control. The invention has the advantages that: the air pressure compensate control circuit is setup, which solves the conflict between the dynamic controller and the static controller, and improves systemic safety and reliability; the invention has simple structure, works reliably and has high control precision; the voltage latch circuit of the invention has simple structure and high precision.
Owner:SUZHOU DONGLING VIBRATION TEST INSTR

Power calibration method of transmitting/receiving equipment

The invention provides a power calibration method of transmitting / receiving equipment. The method comprises the first step that N frequency points are sampled on a frequency spectrum at even intervals, and a gain calibration value GSt corresponding to a single frequency signal fSt generated by power PIN is obtained; the second step that a gain calibration value GB11 corresponding to a wideband signal B11 generated by the power PIN is obtained, wherein the bandwidth of the wideband signal B11 is W1, the lower limiting frequency of the wideband signal B11 is f11L and the upper limiting frequency of the wideband signal B11 is f11H; the third step that a gain calibration value GB 12 corresponding to a wideband signal B12 generated by the power PIN is calculated as follows: if J-M<K<J, the following formula is satisfied (see instructions,) and if J<M<J+M, the following formula is satisfied (see instructions), wherein the bandwidth of the wideband signal B12 is W1, the lower limiting frequency of the wideband signal B12 is f12L and the upper limiting frequency of the bandwidth signal B12 is f12H.
Owner:深圳市极致汇仪科技有限公司

Dummy load testing device and automatic power adjusting method thereof

The invention belongs to the technical field of testing auxiliary equipment, and particularly relates to a dummy load testing device and an automatic power adjusting method thereof. The dummy load testing device comprises a detection module, a main control module, a power adjustment module and a power load, wherein the detection module, the main control module, the power adjustment module and thepower load are in communication connection in sequence, an input end of the detection module is in communication connection with an output end of a tested power supply, and an input end of the power adjustment module is electrically connected with the output end of the tested power supply. The problems that in the prior art, an intelligent control function is lacked, so that the labor cost input is high, continuous power adjustment cannot be achieved, and the power precision cannot meet the requirement are solved.
Owner:成都安捷宜电子有限公司

Power control method of RF transmission module and RF transmission module

The invention relates to a transmission channel power control method of an RF transmission module. The method is used for controlling the power of a multi-band carrier signal. The method comprises the steps of detecting an IF digital power and an antenna port power in a transmission channel of each band of carrier; calculating a power difference of each band of carrier according to the IF digital power and the antenna port power; determining whether to adjust a gain according to the power difference of each band of carrier; if yes, determining a gain change trend of each band of carrier according to the power difference of each band of carrier; and performing corresponding gain adjustment on each band of carrier according to the gain change trend of each band of carrier. According to the transmission channel power control method of the RF transmission module, corresponding gain adjustment is performed on each band of carrier according to the gain change trend of each band of carrier, so that the power accuracy of each band of carrier can meet the requirement, and the transmission power accuracy of the RF transmission module is improved. The invention further relates to an RF transmission module.
Owner:ZTE CORP

Gas fire source device for building member simulation fire experiment and use method

The invention relates to a gas fire source device for a building member simulation fire experiment and a use method. A column member experiment comprises the steps of: fixing a movable bracket, performing safety inspection on a gas distribution device, mounting, connecting and cleaning burners, igniting the burners, setting a use condition 0, performing debugging, putting a column test piece in eight burner middle support areas, opening a main opening-closing valve, igniting all the burners, beginning to record temperature changes of measuring points on the surface of the column test piece, after executing n unit area heat release speed use conditions according to a use scheme, sequentially closing opening-closing valves, closing the main opening-closing valve at last, and stopping recording the temperatures of the measuring points on the surface of the column test piece. A beam member experiment comprises the steps of hanging a beam test piece with a hanging wire over the center of the eight burners in a long side direction of a large rectangle formed by the eight burners, and the procedure of the beam test piece experiment is basically the same as the column test piece experiment. The device can serve for actual requirements of scientific researches and engineering practice such as fire protection design and fire resistance evaluation of a member.
Owner:TIANJIN FIRE RES INST

UE (User Equipment) side uplink power control device and method in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system

The invention relates to UE (User Equipment) side uplink power control device and method in a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system. The UE side uplink power control device comprises an interface module and an uplink power control processing module. The UE side uplink power control method comprises the following steps of: calculating open loop power PDPCH of each uplink time-slot code composite transmission channel CCTrCH of the current subframe when the uplink power control processing module controls the open loop power after receiving the power intensity of a received chip of a main public physical channel; regulating the transmitting power of a corresponding time slot in the next subframe according to the PDPCH; judging whether a downlink time-slot power control command is extracted or not; if so, entering closed-loop power control from the open-loop power control; calculating the closed-loop power of the uplink time slot CCTrCH; and regulating the transmitting power of the corresponding time slot in the next subframe according to the obtained closed-loop power. The invention not only reduces calculation amount, but also increases the power precision, thereby increasing the power control accuracy, improving the call quality and avoiding call drop.
Owner:SANECHIPS TECH CO LTD

Power supply circuit for automatically matching load parallel set number and operation method thereof

The invention relates to a power supply circuit for automatically matching the load parallel set number and an operation method thereof. The power supply circuit comprises a current sampling circuit, a load feedback circuit and a power converter, wherein the power converter is provided with multiple load output ends, the current sampling circuit is used for acquiring a current signal outputted by the power converter, taking the signal as an input signal of the load feedback module and being separately connected with the power converter and the load feedback circuit, and the load feedback circuit is used for determining whether a corresponding load channel exists for the input signal, sending the determination result to the power converter and being connected with the power converter. According to the power source circuit, a channel output current value of the power converter is acquired, whether the load channel exists is determined by the load feedback circuit, and the acquired signal is transmitted to the power converter after determination is carried out by the load feedback circuit, adjustment on the output current of the power converter is realized, the output current and the output power are adjusted in a grade mode, high precision is realized, the power supply circuit is convenient for user to realize classification use, and the power supply circuit realizes relatively low cost.
Owner:深圳茂硕电子科技有限公司

Magnetoresistor for fitness equipment

The invention relates to the field of fitness equipment, in particular to a magnetoresistor for fitness equipment, which comprises a mounting seat, an electromagnetic wheel assembly and an electromagnet, the electromagnetic wheel assembly and the electromagnet are arranged on the mounting seat, the electromagnetic wheel assembly comprises a conductive wheel and a magnetic conducting part, the conductive wheel comprises a wheel disc and a brake edge which is coaxially arranged with the conductive wheel and is perpendicular to the disc surface of the wheel disc, the electromagnet and the magnetic conducting part are arranged on the two sides of the brake edge respectively and are oppositely arranged, a channel for the brake edge to pass through is arranged between the electromagnet and the magnetic conducting part, and an anti-contact gap is formed between the brake edge and the electromagnet and between the brake edge and the magnetic conducting part. Through the arrangement of the electromagnetic wheel assembly, electric conduction and magnetic conduction are separated, the conductive wheel does not conduct magnetism and only conducts electricity, the magnetic conducting part can conduct magnetism and electricity, when the conductive wheel rotates, a magnetizer does not rotate along with the conductive wheel, the magnetizer and the electromagnet are detachably and fixedly arranged on an installation base to form a stable magnetic field, and the conductive wheel rotates to cut magnetic lines of force to generate Lorentz force so as to form magnetic resistance.
Owner:HUNAN JIWEI ELECTRONICS SCI & TECH

Power supply circuit and its operation method for automatically matching the number of parallel groups of loads

The invention relates to a power supply circuit for automatically matching the load parallel set number and an operation method thereof. The power supply circuit comprises a current sampling circuit, a load feedback circuit and a power converter, wherein the power converter is provided with multiple load output ends, the current sampling circuit is used for acquiring a current signal outputted by the power converter, taking the signal as an input signal of the load feedback module and being separately connected with the power converter and the load feedback circuit, and the load feedback circuit is used for determining whether a corresponding load channel exists for the input signal, sending the determination result to the power converter and being connected with the power converter. According to the power source circuit, a channel output current value of the power converter is acquired, whether the load channel exists is determined by the load feedback circuit, and the acquired signal is transmitted to the power converter after determination is carried out by the load feedback circuit, adjustment on the output current of the power converter is realized, the output current and the output power are adjusted in a grade mode, high precision is realized, the power supply circuit is convenient for user to realize classification use, and the power supply circuit realizes relatively low cost.
Owner:深圳茂硕电子科技有限公司

A dynamic design method for banknote turning channel structure

The invention discloses a dynamic design method for banknote turning channel structure, comprising the following steps: measuring and obtaining the transport resistance f of banknotes in the horizontal channel, and determining the minimum value of driving power required for transporting banknotes as the sum of transport resistance f and safety factor K ;Obtain the tension value F of the upper belt when it is working stably; select the width B of the upper belt and the lower belt according to the width of the transmission wheel; calculate the positive pressure value G applied by the upper belt on the supporting wheel and the lower driving wheel, where G is the product obtained by multiplying the tension value F and the width B; calculate the maximum static friction force between the upper belt and the upper surface of the banknote, and the maximum static friction force between the lower surface of the banknote and the lower belt, both of which are Fm, and here ignore the weight of the banknote on the lower surface of the banknote Influenced by the maximum static friction force of the lower belt, the maximum static friction force Fm is the product obtained by multiplying the positive pressure value and the friction coefficient, and the maximum driving power required to transport banknotes is determined to be the sum of the two maximum static friction forces 2Fm.
Owner:CASHWAY FINTECH CO LTD

Power detection system and detection method for identification module

PendingCN113899946AHigh power accuracySimulated load testing is convenient and flexiblePower measurement by current/voltageMicrocontrollerStation
The invention relates to a power detection system and detection method for an identification module, and belongs to the technical field of intelligent power grids. A test host of the system is interactively connected with a plurality of test slaves through a switch, each test slave comprises a controller and a plurality of load identification modules, and a microcontroller is interactively connected with each load identification module. The method comprises the following steps: 1, inserting a load identification modules on a station of a digital test platform; 2, turning on a power switch of the digital test platform, electrifying the test tool and completing initial configuration of the power chip, wherein the initial configuration comprises a tool number, a station number, a batch number and a sample number; 3, selecting a power consumption test scheme through the test host, and starting to test the power of the power chip; and 4, outputting a power consumption test result and judging whether the power chip is qualified or not. According to the invention, the power test precision of the identification module is improved.
Owner:JIANGSU INTELEVER ENERGY TECH CO LTD

A method for equal power control of photovoltaic power generation system based on optimized fibonacci sequence

The invention discloses a method for equal power control of a photovoltaic power generation system based on an optimized Fibonacci sequence. The power is calculated by measuring the PV side voltage and current of the system, and then the Fibonacci sequence is used to realize equal power adjustment of the PV curve; after determining the limit command , to determine the position of the maximum power point of the system, and use the fill factor FF to estimate the voltage value V of the equal power curve k ’, when the actual detected (V k >V k ') and (P k >P 0 ), indicating that the equal power point has not been searched yet, and V k If the estimated value of the fill factor FF has been exceeded, the Fibonacci sequence will be initialized at the next moment, and the equal-power point will be searched for in a small step size. In some cases, the system needs to narrow down the search scope. The application of the present invention can effectively avoid the problem of large power offset in the system due to the use of large step size, improve the system accuracy, and solve the problem in the prior art that the Fibonacci causes a large power error rate of the system at the time of termination.
Owner:苏州海鹏科技有限公司

Small-sized pulse power amplifier

The invention discloses a small-sized pulse power amplifier, which relates to the field of microwave communication and electronic equipment and aims to solve the technical problems of large size, low gain control accuracy, large stepping and the like of a conventional small-size pulse power amplifier. An input end of an n-shaped attenuator (1) is connected with an external radio-frequency signal input end while an output end thereof is connected with a first temperature compensating circuit (2), a first amplifier (3), a second temperature compensating circuit (4), one input end of a digital-control attenuator (5), a second amplifier (6), a third amplifier (7) and a fourth amplifier (8) sequentially serially, an output end of the fourth amplifier (8) outputs amplifying signals to the outside, the other output end of the fourth amplifier is connected with an input end of a detection circuit (9); an input end of a digital-control circuit (10) is connected with external frequency information and communicated with serial ports and an output end thereof is connected with the other input end of the digital-control attenuator (5).
Owner:DFINE TECH

Controllable power supply device with step-up function

A controllable power supply device with a step-up function including a constant voltage generator, a programmable voltage generator, a first switch and a linear regulator is provided. The constant voltage generator is used to provide an initial voltage. The programmable voltage generator is used to receive the initial voltage and adjust the received initial voltage to boost the initial voltage to a power supply voltage. The first connecting terminal of the first switch is used to receive the initial voltage, the second connecting terminal of the first switch is used to receive the power supply voltage, and the third connecting terminal of the first switch is coupled to one of the first connecting terminal and the second connecting terminal. Therefore, the voltage from the third connecting terminal of the first switch is stabilized and is outputted as the output voltage of the controllable power supply device by the linear regulator.
Owner:ASUSTEK COMPUTER INC

A four-channel independent amplitude-stabilized local vibration power distribution device and method

ActiveCN109412621BImprove stabilityAbility to achieve automatic amplitude stabilizationTransmissionCoupling devicesLocal oscillator signalMicrowave
The invention discloses a four-channel independent fixed amplitude type local oscillator power dividing device and a four-channel independent fixed amplitude type local oscillator power dividing method, which belong to the technical field of microwave testing. The four-channel independent fixed amplitude type local oscillator power dividing device comprises a local oscillator cascade extension unit, a first-stage power dividing amplification unit, a second-stage tail end fixed amplitude type power dividing / amplification unit A and a second-stage tail end fixed amplitude type power dividing / amplification unit B. Through adoption of the four-channel independent fixed amplitude type local oscillator power dividing method of the invention, power dividing / amplification / amplitude stabilization functions can be completed after an internal local oscillator source signal is generated, and four channels of local oscillator signals which are necessary can be finally provided for a receiver of a vector network analyzer, each output branch has an independent broadband amplitude stabilization function, thereby improving power stability of the local oscillator signal, an adjustable range of amplitude and power, and an isolating performance between local oscillator channels, as well as enabling the vector network analyzers to have a direct receiver cascade extension capability; in addition, the performance of a local oscillator circuit of the vector network analyzer is improved, technical innovation requirements of a high-stability and high-accuracy vector network analyzer can be furthestsatisfied in a universal way, thereby achieving universality.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD

UWB millimeter wave up-conversion transmitting device and method

The invention discloses a UWB millimeter wave up-conversion transmitting device and method, and belongs to the field of mobile communication. The device comprises a 90dB numerical control attenuator unit, a frequency mixing unit, switch filtering units, a 90dB coaxial attenuator, a frequency conversion local oscillator unit and an MCU control unit. And each path of switch filtering unit comprises a 9 GHz to 21 GHz switch filtering unit, a 20 GHz to 31 GHz switch filtering unit, a 30 GHz to 47 GHz switch filtering unit and a 46 GHz to 67 GHz switch filtering unit. According to the invention, the input radio frequency signal and the local oscillation signal generated by the frequency conversion local oscillation unit are mixed, the frequency coverage of 5GHz-67GHz is realized in cooperation with a post-stage filter, the large-range and high-precision power control of the final output signal is realized, the path bandwidth is as wide as 2GHz, the out-of-band rejection is good, the power output range is large, the accuracy is high, the universality is good, and the device can be suitable for 5G, B5G and other millimeter wave communication signal transmitters.
Owner:中电科思仪科技(安徽)有限公司
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