245 results about "Power detector" patented technology

Provided are automatic level control (ALC) circuit, signal source, method for controlling signal source output power, and storage medium. The ALC circuit includes: at least two stages of ALC loops, each ALC loop including an amplifier, a coupler, a power detector, and an attenuation control module connected sequentially. An output end of an adjustable attenuator is connected to an input node of first stage of ALC loop; an output node of each stage of ALC loop, other than last stage of ALC loop, is connected to a normally on end of a two-way single-on switch, a first gating end of the two-way single-on switch is connected to an input node of a next stage of ALC loop, and the output node of the last stage of ALC loop and a second gating end of each two-way single-on switch are connected to an output end of the ALC circuit.

The invention discloses a monocrystalline silicon neutron irradiation monitoring method and system based on a vanadium self-powered detector, and belongs to the field of nuclear engineering. The monocrystalline silicon neutron irradiation monitoring method based on the vanadium self-powered detector comprises the following steps: calculating a corresponding relation between the burnup depth and nuclide components of a fuel assembly and a corresponding relation between axial burnup distribution of the fuel assembly and fuel circulation and the burnup depth; calculating to obtain a corresponding relationship between the thermal neutron fluence rate of the irradiation pore channel and the burnup cycle and the burnup depth; and taking a position where the thermal neutron fluence rate of the irradiation pore channel does not exceed a given threshold value as a detector mounting area, and calibrating a corresponding relation between a vanadium self-powered detector signal mounted in the detector mounting area and the thermal neutron fluence rate of the irradiation pore channel by using an activated foil, thereby monitoring the thermal neutron fluence rate of the monocrystalline silicon by using the vanadium self-powered detector.

A modular multilevel power converter includes: a capacitor voltage adjuster that calculates an active current component command to make an average voltage of capacitors match a command value; an active power detector that receives an AC current signal and an AC voltage signal and calculates an active power; an active power adjuster that calculates a DC current command value to make the active power match a command value; a first active power command suppressor that suppresses an absolute value of an active power command value; and a second active power command suppressor that adjusts an absolute value of an active power command value.

The invention discloses a digital gain adjustment control circuit which comprises a power detector, a digital peak detector, a gain control module and a digital gain adjustment module. The power detector calculates the power of an input signal by adopting a smooth root-mean-square algorithm, and rapidly adjusts a gain coefficient according to different step lengths adapted to regions; the digital peak value detector adopts a sliding window maximum value method to detect the peak value of an input signal, carries out statistical counting on the overload and underload states of the peak value based on a two-stage method, and judges and adjusts the gain according to a comparison result with a threshold value, so that the influence of frequent gain refreshing on the AGC loop state is avoided, and the loop stabilization time is shortened. Flexible algorithm upgrading and parameter configuration are supported by adopting a full-digital framework, different communication standards are adapted through firmware updating, the limitation of single index control is solved through a dual-detection cooperative working mode, peak overshoot is effectively restrained while the average power of the system is kept stable, the system is conveniently integrated to an SoC chip through modular design, and the reliability of the system is improved. And the power consumption and the size are greatly reduced.

A broadband-capable current / voltage sensing-based VSWR resilient true power / impedance detector and method are disclosed that can be used for single-ended interfaces of individual phased array elements of a phased array antenna, e.g., large-scaled integrated phased-arrays. The true power and impedance detectors, as Built-in-Self-Test (BiST or BIST) circuitries, may each employ an in situ load invariant power and impedance sensor to provide true measurements of power and impedance that can be used to detect and / or monitor for VSWR variations and / or variations in the antenna driving impedance due to antenna element coupling and / or other effects. The measured power and impedance output(s) of each BIST circuitry can then be used to adjust or drive respective passive or active tuning circuitry, e.g., in the power amplifier or other front-end circuitries of the phased array antenna, for performance recovery (or optimization) of a respective array element.

Wireless circuitry may include a transmission line that carries a signal and a power detector that measures the signal. The detector may include a rectifier coupled to a comparator over a differential path. An offset calibrating digital-to-analog converter (OSDAC), a reference generator, and a multiplexer may be disposed on a negative line of the differential path. The OSDAC may produce an offset-compensated voltage by adding different offset voltages to a voltage on the second line over time. The reference generator may generate a set of threshold voltages by adding different reference voltages to the offset-compensated voltage. A temperature sensor may adjust the reference voltages used to generate the threshold voltages based on a temperature of the power detector. The multiplexer may route different threshold voltages to a negative input of the comparator.

According to the test probe assembly, the test system and the test method provided by the invention, in the test probe assembly, the active test probe is additionally provided with the power detector and / or the signal generator on the basis of the passive test probe, so that the transceiving performance test of the tested piece can be realized under the condition that a test instrument is not used, the test cost is reduced, and the test efficiency is improved. The total transmitting power or the total receiving power of the tested piece can be accurately obtained in one-time transmitting testing or one-time receiving testing, the testing efficiency is greatly improved, and the method is particularly suitable for rapid testing of a production line.

Wireless circuitry can include a radio-frequency amplifier configured to operate in a plurality of different mode, configuration, or bias settings, a power detector coupled to an output of the radio-frequency amplifier, a plurality of power integrators, and a switching circuit having an input configured to receive a measured power level from the power detector and having outputs coupled to the plurality of power integrators. The switching circuit can have a switch state that is adjusted based on a current mode, configuration, or bias setting for the radio-frequency amplifier. The power integrators may be part of multiple power control loops. The power control loops can be coupled to additional switching circuitry activated based at least party on the current mode, configuration, or bias setting and a subsequent mode, configuration or bias setting for the radio-frequency amplifier.

Wireless circuitry may include a transmission line that carries a signal and a power detector that measures the signal. The detector may include a rectifier coupled to a comparator over a differential path. An offset calibrating digital-to-analog converter (OSDAC), a reference generator, and a multiplexer may be disposed on a negative line of the differential path. The OSDAC may produce an offset-compensated voltage by adding different offset voltages to a voltage on the second line over time. The reference generator may generate a set of threshold voltages by adding different reference voltages to the offset-compensated voltage. A temperature sensor may adjust the reference voltages used to generate the threshold voltages based on a temperature of the power detector. The multiplexer may route different threshold voltages to a negative input of the comparator.

The invention discloses a self-detection method, a radio frequency system, a radio frequency device and a storage medium, and belongs to the technical field of radio frequency. In the process that the radio frequency link outputs the radio frequency signal, the test channel is controlled to be conducted, and the directional coupler is controlled to be disconnected from the power detector, so that radio frequency power calibration is carried out through the programmable gain amplifier, the power detector and the digital logic control circuit; or, the test channel is controlled to be disconnected, and the directional coupler and the power detector are controlled to be connected, so that standing wave alarm processing is carried out. By controlling the connection and disconnection of the test channel and the directional coupler with the power detector, the purposes of power calibration in a power-on or transmitting power gap, real-time echo monitoring and standing wave alarm can be achieved.

The invention discloses a low-power-consumption adaptive antenna gain control device for a navigation system, and belongs to the technical field of navigation communication. Comprising an adjustable LNA array, a signal quality monitoring module and an MCU control unit. The adjustable LNA array is used for receiving a satellite signal and dynamically adjusting gain according to a control signal output by the MCU control unit; the signal quality monitoring module integrates a power detector and a signal-to-noise ratio analyzer, and is used for collecting the power, the signal-to-noise ratio and the multipath interference intensity of an input signal in real time, and generating a state vector S based on the collected parameters; and the MCU control unit is used for executing an adaptive gain control algorithm, calculating an optimal gain value based on the state vector S, and dynamically adjusting the gain configuration of the LNA array. Through the low-power-consumption LNA array and a self-adaptive gain control algorithm, high-precision signal receiving of the Beidou / GNSS terminal in a complex environment is realized, power consumption is remarkably reduced, and positioning reliability is improved.

Wireless circuitry can include a radio-frequency amplifier configured to operate in a plurality of different mode, configuration, or bias settings, a power detector coupled to an output of the radio-frequency amplifier, a plurality of power integrators, and a switching circuit having an input configured to receive a measured power level from the power detector and having outputs coupled to the plurality of power integrators. The switching circuit can have a switch state that is adjusted based on a current mode, configuration, or bias setting for the radio-frequency amplifier. The power integrators may be part of multiple power control loops. The power control loops can be coupled to additional switching circuitry activated based at least party on the current mode, configuration, or bias setting and a subsequent mode, configuration or bias setting for the radio-frequency amplifier.

A transmit (TX) local oscillator (LO) leakage calibration circuit, the circuit comprising: a transceiver having a transmit portion and a receive portion; an interface circuit connected to the transmitting portion and the receiving portion; an impedance control circuit connected to a low noise amplifier (LNA) in the receiving portion, the impedance control circuit configured to adjust an input impedance of the LNA; a power detector coupled to an output of the LNA; and a local oscillator cancellation element connected to the power detector, the local oscillator cancellation element configured to adjust an input of the transmit section based on a TX LO leakage detected by the power detector.

The invention relates to a method and a circuit system for regulating power supply by using a low dropout regulator, the method comprising: monitoring a voltage level by a power detector: detecting the voltage level according to a predetermined first voltage level as a high voltage and a second voltage level as a medium voltage, the high voltage being powered on first and the medium voltage being powered on later; performing a bias shift and a fixed bias mechanism according to the detected voltage level; adjusting the output voltage according to the feedback loop by using the actual output voltage of the source follower and the predetermined safety voltage as the reference; the bias voltage shifting mechanism is executed when the high voltage is detected during the initial power-on period of the high-voltage rail and comprises the steps of conducting the high-voltage protection circuit, reducing the actual bias voltage to counteract the required high bias voltage and applying the actual bias voltage to the feedback system; the fixed bias mechanism is performed when the high voltage is detected, including opening the overvoltage protection circuit, applying a fixed reference voltage to an actual gate of a source follower of the feedback system, so that the feedback system is instantaneously started together with the medium voltage when started.

The invention discloses a low-power inspection device for a wireless power device, and belongs to the field of power inspection.The low-power inspection device comprises a clamp, a power connection piece is arranged on the left side of the clamp, a contact piece is arranged above the power connection piece, a contact is elastically connected to the inner surface of the clamp, a through hole is formed in the upper portion of the clamp, and an air bin is fixedly connected to the inner surface of the through hole; a suction cup is fixedly connected to the lower portion of the air bin, a piston rod is slidably connected to the inner surface of the air bin, a lifting piece is fixedly connected to the upper end of the piston rod, a mounting piece is hinged to the inner surface of the clamp, a first hydraulic bin is fixedly connected to the right side of the mounting piece, and a first hydraulic rod is slidably connected to the inner surface of the first hydraulic bin. According to the invention, the contact on the clamp clamps the power connection sheet, so that the electric quantity detector carries out electric quantity detection, and when the clamp clamps, the piston rod is driven to extract gas in the gas bin, so that the sucker generates negative pressure to be adsorbed on the power connection sheet, and the device has the effect of facilitating stable clamping and fixing.

The invention provides a preparation method of a protection pipe for a cobalt self-powered detector. The preparation method comprises the following steps: S1, preparing materials; s2, electromagnetic stirring induction melting; s3, vacuum consumable remelting is carried out; s4, large-deformation forging cogging is conducted; s5, warm rolling and pipe rolling; s6, cold rolling, cold drawing and annealing; and S7, surface treatment. The chemical components of the obtained pipe meet the requirements of Inconel 690 alloy components; the surface of the pipe has no cracks and white points; the quality grade of internal defects of the pipe is judged to be grade A by adopting ultrasonic flaw detection (UT); the sleeve has no leakage; the tensile strength of the pipe at the high temperature of 700 DEG C is greater than or equal to 420 MPa, the yield strength is greater than or equal to 230 MPa, the ductility is greater than or equal to 26%, and the microscopic average grain size grade G of the grain size detected by a metallographic microscope is 2.0-3.5; and the surface roughness measured by a roughness measuring instrument is less than or equal to Ra1.20 [mu] m.

An antenna module may include antennas, RF chains connected to the antennas, a splitter / combiner connected to the RF chains, a mixer configured to upconvert an IF signal input to the antenna module into a transmission RF signal and output the upconverted signal to the splitter / combiner and / or to downconvert a reception RF signal which is a combination of signals from the RF chains provided from the splitter / combiner, a plurality of first couplers connected between the RF chains and the antennas, a second coupler for measuring a magnitude corresponding to a transmission RF signal before split by the splitter / combiner and / or the reception RF signal combined by the splitter / combiner, and a power detector configured to provide a plurality of magnitudes of a plurality of signals from the plurality of first couplers and a magnitude of a signal from the second coupler.

An apparatus for wireless communications includes a power amplifier, a low-noise amplifier, a power detector, and a transformer. The transformer includes a first inductor coupled to an output of the power amplifier, and a second inductor coupled to an antenna, wherein the second inductor is magnetically coupled with the first inductor. The transformer also includes a third inductor coupled to an input of the low-noise amplifier, wherein the third inductor is magnetically coupled with the second inductor. The transformer also includes a coupling inductor coupled to an input of the power detector, wherein the coupling inductor is magnetically coupled with at least one of the first inductor and the second inductor.

The invention relates to a self-powered detector on-pile test device and method.The device comprises an outer support fixed in a test dry hole channel and an inner support coaxially nested in an inner cavity of the outer support, the outer diameter of the outer support and the inner diameter of the test dry hole channel form micro-tight fit, and the inner support can rotate around the axis relative to the outer support; a first mounting position for mounting at least one standard self-powered detector is arranged on the outer support, a second mounting position for mounting at least one self-powered detector to be detected is arranged on the inner support, and a cross arm is arranged at the bottom of the outer support and used for being in contact with the lower end of the inner support so as to limit the axial insertion position of the inner support. According to the on-pile test device and method for the self-powered detector, single-point calibration errors caused by uneven radial distribution of neutron fluence rates can be effectively eliminated or greatly reduced, and the calibration precision and the representativeness of results are remarkably improved.

The invention provides a receiving module, an operation method thereof and user equipment using the receiving module. The receive module includes a plurality of IF paths associated with the plurality of RF paths, at least one multiplexer (MUX), and at least one power detector (PD). Each IF path includes a transimpedance amplifier (TIA) and a low pass filter (LPF). The LPF is coupled to an output of the TIA. The at least one multiplexer is coupled to the plurality of IF paths. At least one power detector (PD) selectively couples at least two of the IF paths through at least one multiplexer to alternately detect signal strength of respective nodes between the TIA and the LPF in the respective IF paths. The at least two IF paths are associated with at least two RF paths of the plurality of RF paths having the same carrier frequency.

A bend-insensitive multimode optical fiber attenuation test device and method includes a light source, a single-mode or few-mode injection pigtail, a coupling injection device, an optical power detector, and a beam quality analyzer. The light source is connected to the coupling injection device via the single-mode or few-mode injection pigtail, and the coupling injection device and the optical power detector are connected to the multimode optical fiber under test. The beam quality analyzer is connected to the multimode optical fiber under test via a bare fiber adapter. The test device provided by the present invention uses a high-precision five-dimensional adjustment frame to adjust the injection light angle and thus the injection light mode, achieving high flexibility in controlling the target mode during attenuation testing.

The utility model discloses fool-proof double-port power supply leakage detection equipment, which comprises a positioning base, a power supply detector arranged at the top of the positioning base, a top box arranged at the top of the power supply detector, a processor arranged in the top box, a first test wire arranged at one side of the power supply detector, a first charging connector arranged at one end of the first test wire, and a second charging connector arranged at the other end of the first test wire. A second test line is arranged on the other side of the power detector, a second charging connector is arranged at one end of the second test line, positioning mechanisms for limiting the power detector are fixedly installed on the two sides of the positioning base, and each positioning mechanism comprises a fixing frame, a positioning threaded rod in threaded connection to the middle of the fixing frame and a limiting clamping block arranged at one end of the positioning threaded rod. The corners of the bottom of the power supply detector are fixedly connected with supporting columns, and the bottom of each supporting column is fixedly connected with a positioning clamping column, and the fool-proof double-port power supply leakage detection equipment guarantees the accuracy and reliability of the test process, improves the test quality, and is better in use stability.

The application relates to the technical field of electrical engineering, in particular to an intelligent power measuring device for generator control, which comprises a generator, a power detector is arranged on one side of the generator, a connecting hole is formed in one side of the power detector, a connecting line is fixedly connected to the generator, the other end of the connecting line is used for being connected with the power detector, a connecting column is fixedly connected to the inside of the power detector, the connecting column is located on one side of the connecting hole, a rotating plate is sleeved on the connecting column, one end of the rotating plate is rotationally connected with the connecting column, the other end of the rotating plate is fixedly connected with a fixing column, and the fixing column is used for winding the connecting line on the connecting column; when the connecting line on the generator is connected with the power detector, the connecting line can be automatically wound on the connecting column under the action of the fixing column.

The utility model relates to the technical field of geotechnical engineering investigation, in particular to a detachable hydraulic pulling device for a light dynamic penetrometer, which comprises a bearing plate, a cross-core hydraulic jack, a connecting rod piece and a cross-core cone, the connecting rod piece penetrates through a hydraulic jack center-penetrating hole of the center-penetrating hydraulic jack, and then the lower end of the connecting rod piece is fixedly connected with the top of the light dynamic sounding rod. A center-penetrating cone is arranged at the top of a hydraulic jack movable plunger of the center-penetrating hydraulic jack. The upper end of the connecting rod piece penetrates through the center penetrating cone and then presses the center penetrating cone against the top of the movable plunger of the hydraulic jack. According to the detachable hydraulic pulling device for the light dynamic penetrometer, the problem of upward pulling force is effectively solved through the hydraulic jack, the problem of eccentric stress during upward pulling of the probe rod is effectively solved through combination of the jack, the fixing support, the bearing plate and other assemblies, and the device is detachable, easy and convenient to install, convenient to carry and reliable in use.

The present invention discloses a method and device for automatically detecting mode locking of an optical frequency comb with a wide frequency band. The current of a pump source is controlled by an FPGA to enable the optical frequency comb oscillator to output optical frequency comb pulsed laser. The optical frequency comb pulsed laser is divided into two paths by a beam splitter for output. The first path serves as the measurement light for subsequent measurement. The second path is converted into an electrical signal by a photodetector I for subsequent judgment of the mode locking state. The FPGA controls and gradually increases the pump current of the pump source. Meanwhile, the electrical signal converted by the photodetector I is input into a radio frequency power detector, and a detected voltage signal is output according to the peak characteristics of the electrical signal. When it is judged through the detected voltage signal that the pulse peak value of the electrical signal output by the photodetector I is greater than 1V, the detected voltage signal is sampled multiple times. The absolute value of the difference between two adjacent sampling results is taken and accumulated. When the accumulated sum is less than the threshold set by the microcontroller, it is judged that the optical frequency comb has completed mode locking, and at this time, the increase of the pump current is stopped. The present invention can achieve automatic mode locking of the optical frequency comb and effective detection of the state after mode locking.

The application discloses a method and system for quantitatively analyzing self-insulation resistance shunt effect of a self-powered detector, and the design steps are as follows: a circuit model of the self-powered detector is established according to a working principle of the detector; specific parameters of each element in the circuit are calculated according to geometric structure and physical parameters of the detector; a state space equation in a matrix form is established according to a current generation mechanism of the self-powered detector in a radiation field and the circuit model, and a system state transition matrix of the self-powered detector system is established by solving a matrix index; and influences of geometric dimensions and physical parameters of the detector on the insulation resistance and the shunt effect thereof are analyzed according to the system state transition matrix. The method can quantitatively calculate the shunt effect of the insulation layer resistance of the self-powered detector with different structures and parameters, and can accurately calculate a change of a capacitive current with time, thereby providing guidance for design and application of the detector.

ABSTRACT:A power transmitter (101) transfers power to a power receiver (105) and comprises a power input (209) receiving supply power. A power detector (211) detects a restoring of the supply power following an outage, and a presence detector (213) detects the presence of the power receiver when supply power is being restored. A first communicator (207) can communicate with a second communicator (509) of the power receiver (105) using a short range communication channel. A message circuit (215) transmits a power restore message to the second communicator (509) when supply power is being restored. A user action detector (217) detects a power receiver user action and a controller (205) arranged to initiate a power transfer to the power receiver after power restoration in response to the detection of the user action and to inhibit initiation of the power transfer after power restoration if the user action is not detected. The power receiver (105) can generate a user alert when receiving the power restore message.

This application discloses a core power prediction method and apparatus, a core monitoring method and system, relating to the field of nuclear industry technology. The core power prediction method includes: acquiring target power detector data for a target core; the target power detector data includes values ​​from multiple power detectors; processing the target power detector data using a target power prediction model to obtain a predicted power value for the target core; wherein the target power prediction model employs a data grouping processing method, trained using historical power detector training data and their corresponding first historical power values. According to embodiments of this application, this core prediction method can monitor core power using a small number of detectors while ensuring the accuracy of core power prediction.

The application relates to the technical field of laser heterodyne atmospheric remote sensing, and discloses a laser heterodyne atmospheric remote sensing device and method applied to a ship, the device comprising a sun tracking module, a heterodyne light path module, a signal processing module and a computer device, wherein the sun tracking module comprises a sun tracking meter, a photoelectric detector and an optical switch, the heterodyne light path module comprises a laser, an optical attenuator, an optical fiber combiner and a photoelectric detector; the signal processing module comprises a radio frequency amplifier, a radio frequency filter, a power detector, a lock-in amplifier and a data collector. The laser heterodyne atmospheric remote sensing device applied to the ship can reduce the precision requirement of a sun tracking meter for laser heterodyne detection, and realizes spectral detection under the condition that the probability of the alignment precision being within the range of 0.1 degrees is greater than 50%.

An amplification device includes an amplification unit, an impedance unit and a log power detector. The amplification unit includes an input terminal for receiving a radio-frequency signal, an output terminal for outputting an amplified radio-frequency signal, and a detected terminal for outputting a detected signal related to the radio-frequency signal. The impedance unit is used to provide an impedance. The impedance unit includes an input terminal coupled to the detected terminal of the amplification unit for receiving the detected signal, and an output terminal for outputting a power signal. The log power detector is used to generate a power indication signal according to the power signal. The log power detector includes an input terminal coupled to the output terminal of the impedance unit, and an output terminal for outputting the power indication signal.