26 results about "Measuring receiver" patented technology

In an embodiment, a method includes wirelessly transmitting power using a transmitter LC tank of a wireless power transmitter, wirelessly receiving power from the transmitter LC tank using a receiver LC tank of a wireless power receiver, interrupting wirelessly transmitting power for a slot period, during the slot period, measuring a receiver signal associated with the receiver LC tank, transmitting receiver data based on the measured receiver signal to the wireless power transmitter, determining a power loss associated with the wirelessly transmitting power based on the measured receiver signal and detecting a metallic object based on the determined power loss.

An apparatus includes a transmitter; a DC-DC converter configured to generate, based on a switching schedule, an output voltage for the transmitter element; a receiver path to sample a received signal based on a sampling schedule; a noise detector to measure receiver path noise; and a controller to perform a calibration process. The calibration process includes acquiring a first measurement of receiver path noise for a first candidate offset setting that defines a first time offset applied to default timing of one of the switching schedule and the sampling schedule; acquiring a second measurement of receiver path noise for a second candidate offset setting that defines a second, different, time offset applied to default timing of the switching schedule and the sampling schedule; and selecting for use in sampling the received signal, one of the first or second candidate offset setting based on a noise-based criteria.

A method for measuring a sensitivity of a receiver is provided. The method includes: during a first stage, controlling a signal generator to transmit an input test signal to an input node of the receiver, wherein the receiver generates an output test signal on a first output node of the receiver according to the input test signal; calculating a path loss from the input node of the receiver to the first output node of the receiver according to the input test signal and the output test signal; during a second stage, measuring an output noise power on a second output node of the receiver after a load is connected to the input node of the receiver; and calculating the sensitivity of the receiver according to the path loss and the output noise power. The load may be an antenna or a 50-ohm impedance load.

The present application relates to the technical field of aircraft testing, and discloses a radiation and conduction overlapping frequency band HIRF comprehensive sensitivity test device and a test method, the device comprising a reverberation chamber and a test control system, a grounding panel and a support seat are arranged in the reverberation chamber, the support seat is arranged on the grounding panel, a device under test is placed on the upper surface of the support seat, a stirrer is arranged at a corner of the reverberation chamber, and the test control system is in bidirectional communication with a signal generation and processing system, an adaptive delay compensation system, a radiation test system, a conduction test system, an optoelectronic conversion system and a measurement receiver. The present application aligns the arrival time of a radiation field and conduction interference at the device under test through the adaptive delay compensation system, reproduces the electromagnetic energy synchronous coupling effect in the HIRF environment, combines field strength closed-loop control and conduction current monitoring feedback, synchronously applies a radiation field strength and wire bundle injection current that meet standard levels, and realizes verification of the coupling mechanism of radiation-conduction comprehensive sensitivity.

According to the EDMA and McBSP-based inter-satellite-borne receiver DSP communication method provided by the invention, real-time data communication of an McBSP interface between DSPs is controlled by using the EDMA, and receiving and transmitting are not required to be allocated by a CPU, so that the DSP is ensured to have sufficient machine time to complete service processing functions such as navigation message processing, observed quantity calculation, positioning / orbit determination solution and inter-satellite measurement real-time processing; a multi-channel buffer serial port McBSP interface capable of being flexibly configured is adopted between the DSPs for communication, and the hardware interface design complexity is reduced on the premise that the real-time data communication rate between the DSPs is met. By means of reasonable embedded software design, full duplex communication of the McBSP is achieved only by inquiring an EDMA event completion mark in one interrupt (timer interrupt), and the software complexity is reduced while the real-time requirement of interface data communication is met; according to the method, the design of data communication hardware interfaces among the DSPs of the receiving boards in the current double-satellite measurement receiver is simplified, and the reliability and the real-time performance of data transmission among the DSPs of the multi-system and multifunctional double-satellite measurement receiver are greatly improved.

The invention relates to the technical field of settlement monitoring and discloses a water bag preloading settlement real-time monitoring and positioning device which comprises a movable sleeve, a positioning rod is movably sleeved with an inner cavity of the movable sleeve, a distance measuring transmitter is arranged at the top of the movable sleeve, and a distance measuring receiver is arranged at the top of the positioning rod. A moving following assembly is arranged on the upper portion of the movable sleeve. A turbine type rack and a worm are arranged between a movable sleeve and a positioning rod, when the movable sleeve is pressed to move downwards, the turbine type rack is meshed with the worm to drive the worm to rotate so as to drive a movable rod to rotate, the movable rod rotates to drive a gear to rotate, and due to the fact that the gear is meshed with a gear ring, the base and a spiral blade are driven to rotate; and when the movable sleeve moves downwards, the spiral blade can be driven to rotate, and soil adhered to the outer wall of the movable sleeve can be conveniently cleaned by utilizing the spiral blade, so that the movable sleeve can move on the outer side of the movable sleeve more smoothly, and settlement can be better monitored.

A vector network analyzer convenient to expand comprises a case, an excitation source, a first switch, a directional coupler, a measurement receiver, a reference receiver and a second switch. The first switch comprises an input end connected with an excitation source and a plurality of output ends, and part of the output ends are connected with an external excitation interface. The number of the directional couplers is multiple, the directional couplers are respectively connected with the other part of output ends of the first switch, and each directional coupler is also respectively connected with a port. The number of the measurement receivers and the number of the reference receivers are both multiple. The output end of the second switch is connected with the measurement receiver or the reference receiver, the second switch comprises two input ends, one input end is connected with the directional coupler, and the other input end of the second switch connected with the measurement receiver is connected with a measurement receiving interface; and the other input end of the second switch connected with the reference receiver is connected with a reference receiving interface. According to the utility model, the port expansion can be carried out while the built-in port can be used.

A thermally adaptive antenna system having an antenna structure, an EM) power signal, a DC power signal, an impedance tuner, a temperature sensor in the antenna, a DC-DC conversion component, and a microcontroller. The microcontroller provides a tuning command to the impedance tuner, causing the impedance tuner to compensate for an impedance change in the antenna due to a temperature change in the antenna. An environmentally adaptive antenna system has an antenna structure, an EM power signal, a DC power signal, an EM power splitter, a directional coupler, a reference receiver, a measurement receiver, an impedance tuner, and a controller. The controller calculates antenna impedance change based on observed changes in return loss, calculates a corresponding correction to the antenna impedance, and sends a command to the impedance tuner to implement the correction to the antenna impedance.

The invention discloses a method for measuring insertion loss of a harmonic filter. Measurement is carried out under the condition of rated voltage and rated current of a 50Hz / 400Hz power grid actually used by the harmonic filter, the method is simple, operation is convenient, and data are real and visual. Meanwhile, high-end equipment such as a network analyzer and a measurement receiver is not needed, and the measurement system is low in cost and reliable in operation. According to the method disclosed by the invention, the acquired analog data is transmitted after A / D conversion, so that the measured data is real and reliable and is prevented from being interfered by an electromagnetic environment. Finally, data processing is completed by means of existing mature software, a measured result is displayed in a frequency spectrum graph, the system is stable, new software does not need to be developed, time and money are saved, and efficiency is high.

The invention relates to a device comprising: a transmitter; a DC-DC converter configured to generate an output voltage for the transmitter element based on the switching schedule; a receiver path that samples the received signal based on the sampling schedule; a noise detector that measures receiver path noise; a controller, the controller performing a calibration process, the calibration process including: acquiring a first measurement of receiver path noise for a first candidate offset setting, where the first candidate offset setting defines a first time offset applied to a default timing of one of a switching schedule and a sampling schedule; obtaining a second measurement of receiver path noise for a second candidate offset setting, the second candidate offset setting defining a second different time offset applied to the default timing of the switching schedule and the sampling schedule; and selecting one of the first or second candidate offset settings for sampling the received signal based on a noise-based criterion.

The invention provides a device and a method for measuring alignment and misalignment of a barrel. The invention discloses a device for measuring alignment and misalignment of a barrel, which comprises a carrier roller, a radial track, a radial pulley, a measurement transmitting mechanism, an axial track, an axial pulley, a measurement receiving mechanism and a console, a radial pulley at the end part of the cylinder drives the measurement emission mechanism to move radially, and a laser on the radial pulley is used for establishing a first reference; the axial pulley on the side portion of the cylinder drives the measurement receiving mechanism to move axially along the cylinder, and the target mirror on the measurement receiving mechanism is matched with the laser to establish a second reference. The mode of combining laser collimation and photoelectric target lens induction is adopted to replace manual visual observation and caliper measurement. And the console calculates the butt joint alignment tolerance according to the difference between the two references and the theoretical value of the barrel. The device adapts to cylinders of different specifications through the modularized track and the adjustable mechanism, realizes high-precision, automatic and continuous measurement of the alignment tolerance of the opening side of the cylinder by adopting a mode of combining non-contact laser measurement and mechanical contact, and effectively improves the detection efficiency and accuracy.

The invention relates to the field of tower-type photo-thermal mirror fields, and discloses a tower-type photo-thermal mirror field heat absorber output thermal power prediction method, which comprises the following steps: on the basis of establishing a tower-type photo-thermal heat absorber thermal power prediction generalized linear mixed quantile regression model, solving unknown parameters in the model; predicting the output thermal power of the heat absorber at a certain moment in the future by using the obtained model; according to the method disclosed by the invention, the generalized linear mixed quantile model is adopted, and the model has no requirements on independent variables and dependent variables, can be suitable for data of any hierarchical structure, considers a fixed effect and a random effect, is relatively high in prediction precision, and is more stable in performance on outliers or abnormal values; quantiles are also considered, so that the integrality of the thermal power prediction effect of the heat absorber is more accurate and flexible; according to the method, various random effects including periodic factors, wind speed, temperature and the like are considered, and the precision for measuring the heat loss of the heat absorber is higher.

A port expansion device comprises an excitation source switch, a reference receiving switch, a measurement receiving switch and a directional coupler. The number of the excitation source switches, the number of the reference receiving switches and the number of the measurement receiving switches are all k, the number of the directional couplers is N, and N is larger than or equal to k. The excitation source switch is connected with an excitation source interface. And the reference receiving switch is connected with a reference receiver interface. And the measurement receiving switch is connected with a measurement receiver interface. The directional couplers are connected with ports, each excitation source switch is connected with at least one directional coupler, each reference receiving switch is connected with at least one directional coupler, and each measurement receiving switch is connected with at least one directional coupler. The port expansion equipment can conveniently expand the vector network analyzer, and improves the multi-port test performance.

The application discloses a kind of receiver power linearity testing device and method, the device includes signal source, single-pole double-throw radio frequency switch S1 and S2, amplifier A1, A2 and A3, power divider, power meter, program-controlled step attenuator T1, T2, T3 and T4 and measured receiver, the signal source is connected single-pole double-throw radio frequency switch S1, the first output of single-pole double-throw radio frequency switch S1 is sequentially connected amplifier A1 and program-controlled step attenuator T1, its second output is sequentially connected amplifier A2 and program-controlled step attenuator T2, program-controlled step attenuator T1, T2 respectively connect the first input and second input of single-pole double-throw radio frequency switch S2, its output end is connected the input of power divider, the first output of power divider is connected power meter, its second output is sequentially connected amplifier A3, program-controlled step attenuator T3, program-controlled step attenuator T4 and measured receiver.The application compared with traditional testing method, test precision is high, test dynamic range is big.

The utility model discloses a wireless temperature measuring device and a wireless temperature measuring system. The wireless temperature measuring device comprises a host box, an antenna, a waterproof and dustproof joint, a wire protection corrugated pipe, an armored cable, a thread fixing piece and a temperature measuring probe, wherein the antenna and the waterproof and dustproof joint are connected with the host box; the wire protection corrugated pipe is connected with the waterproof and dustproof joint; the armored cable is connected with the wire protection corrugated pipe; the temperature sensor is arranged in the temperature measuring probe; the host box comprises a box body, a main board and a battery, wherein the main board and the battery are respectively arranged in the box body, and the main board is respectively and electrically connected with the temperature sensor, the antenna and the battery. A temperature sensor of the wireless temperature measuring device can measure the temperature in a severe environment, and the temperature is transmitted to the wireless temperature measuring receiver through an antenna of the wireless temperature measuring device and is transmitted to a cloud end or a user terminal; therefore, a worker does not need to use a temperature measuring device to measure the temperature in a severe environment by himself / herself.

Described herein are phased array and transceiver systems with distortion measurement circuitry configured to obtain distortion measurements of system transmitters and provide the distortion measurements to receive beamforming components of the system. Such systems advantageously make use of existing beamforming components of the system to additionally route distortion measurements for baseband DPD processing. Such systems may not need external components to measure signals radiated by antennas of the system or dedicated paths linking system transmitters directly to a baseband processor. In some embodiments, receive beamforming components may be configured to sum distortion measurements from each transmitter to create an aggregate distortion measurement usable as representative of the average transmitter for DPD processing.

This application relates to the field of geological exploration, specifically to a geological exploration method and apparatus based on three-dimensional reverse-time migration. The method includes: constructing a three-dimensional velocity model of the area to be explored; performing source simulation and receiver simulation on the three-dimensional velocity model; calculating the source wavefield based on the source location and source signal, and storing the boundary source wavefield within the source wavefield; performing reverse-time reconstruction based on the receiver point location and measured receiver point signal to obtain the receiver point wavefield; reading the boundary source wavefield, and performing complete wavefield recovery based on the boundary source wavefield to obtain the recovered source wavefield; performing time-coupled integration on the recovered source wavefield and the receiver point wavefield to obtain a three-dimensional subsurface reflection structure image of the area to be explored. This application can achieve the technical effect of reducing data transmission and storage costs while improving the efficiency of geological exploration.

The application discloses a cable coupling interference effect test system and method. The system comprises a simulation cable coupling effect test device; the simulation cable coupling effect test device comprises a simulation shielded cable, a receiver, a first cable interface box and a second cable interface box; the simulation cable coupling effect test device is laid within 10 cm of a field interference cable, and the coupling length is greater than 3 m; at least one of the first cable interface box and the second cable interface box adopts a coaxial cable test structure; the coaxial cable test structure is used for measuring the shield layer induced current and the core line coupling voltage of the simulation shielded cable; the receiver is connected with a core line coupling voltage interface and a current probe in a current test cabin to reflect the coupling interference effect level. The application can accurately obtain the shield layer induced current and the cable core line induced voltage generated in the field environment, thereby evaluating the electromagnetic coupling interference level of the field electromagnetic environment on the cable, and providing theoretical data support for field test electromagnetic compatibility.

The application discloses a performance monitoring method and system of a radio time service system, and relates to the radio time service field.The method comprises the following steps: judging the working state of a monitoring receiver according to the working state information of the monitoring receiver and the state information of an external reference time frequency signal; when the working state of the monitoring receiver is normal, the monitoring receiver demodulates time service message parameters according to the received radio time service signal of the radio time service system, and measures signal quality parameters; the monitoring receiver takes a standard frequency signal as a reference input; the monitoring receiver receives the radio time service signal and outputs at least one 1PPS timing signal; a time difference measuring device measures the deviation between the 1PPS timing signal output by the receiver and a standard time 1PPS signal, and obtains a time service deviation; and the performance of the radio time service system is determined according to the time service deviation, the time service message parameters and the signal quality parameters.The application can realize unified and comprehensive monitoring of the radio time service system.

Vectorial network analyzer with n measurement ports, where n is at least two, for measuring an n-port measurement object (315;515), with a signal generator (200;300;400) for generating an excitation signal, wherein the signal generator (200;300;400) has a mixer (202) which converts the excitation signal from an intermediate frequency plane to a measurement frequency plane, wherein only a single measuring receiver (220;320;420) is available to receive the excitation signal or the measuring signal reflected or transmitted by the object being measured (315;515), wherein the measuring receiver (220;320;420) has a first mixer (221) which converts the excitation signal from a measurement frequency plane into a first intermediate frequency plane (f IF1 ) converted, wherein the mixer (202) of the signal generator (200;300;400) and the first mixer (221) of the measuring receiver (220;320;420) are connected to a common oscillator (230;330;430) and wherein a first switching device (317,319; 519) is provided which switches the measuring receiver (220;320;420) between the signal generator (200;300;400) and the n gates of the object being measured (215;315;515).

The utility model discloses a tool for accurately measuring the height of a GNSS (Global Navigation Satellite System) receiver, which comprises a GNSS receiver, the bottom end of the GNSS receiver is spirally connected with a middle rod, the two sides of the middle rod are provided with side rods, the center of each side rod is provided with a sliding sleeve, the outer side of the lower end of each side rod is fixedly provided with a stable insertion rod, the inner side of a fixing piece is rotatably provided with a belt roller, and the fixing piece is provided with a sliding sleeve. The GNSS receiver and the top of the middle rod are screwed to complete assembly, the side rod and the stable insertion rod are inserted into the land to complete device positioning and installation, the clamping block slides to enable the flexible rule belt to fall downwards under the driving of the balancing weight, the crank is rocked to adjust the needed scale, and then the relative position of the middle rod and the sliding sleeve is adjusted. According to the device, the height of the GNSS receiver can be accurately adjusted, the height of an existing instrument can be measured through the flexible rule belt, and the device is simple in structure, easy and convenient to install and debug and easy to quickly and familiar to use.

The invention discloses a noise parameter test system, method and device for a low-noise amplification module and a medium, and particularly relates to the technical field of noise parameter testing, the technical key points are that a first test module is connected between a first port and one end of a reference signal source, and a second test module is connected between a second port and the other end of the reference signal source; the first port is connected with a first connecting end of the first receiver coupler, a second connecting end of the first receiver coupler is connected with a first connecting end of the first switching circuit, and a coupling end of the first receiver coupler is connected with the first measurement receiver; a second connecting end of the first switching circuit is connected with a first connecting end of a first reference receiver coupler, a second connecting end of the first reference receiver coupler is connected with a reference signal source, and a coupling end of the first reference receiver coupler is connected with a first reference receiver; the first switch circuit is connected with an electronic calibration member.

The application belongs to the technical field of ionosphere monitoring, and relates to an ionosphere monitor arranged in a GNSS double-frequency receiver of an ionosphere monitoring station, comprising: a GNSS high-precision OEM board, which obtains GNSS double-frequency pseudo-range observations, carrier phase observations, receiver position information, satellite elevation angles, azimuth angles and satellite ephemeris data according to the length of a time window set, and respectively transmits the data to a TEC inversion calculation module and a storage module; the TEC inversion calculation module is realized based on an embedded processor, uses a sliding time window to pre-process the received data, establishes an ionosphere vertical TEC spherical harmonic function model, adopts Kalman filtering iteration to solve, obtains nonlinear model coefficients and hardware deviations of the receiver and the satellite, realizes quasi-real-time monitoring of the ionosphere vertical TEC value in the space above the monitoring station, and transmits the TEC value to the storage module; and the storage module stores GNSS measurement data and the ionosphere vertical TEC value.

The embodiment of the invention provides a cable tested equipment testing all-in-one machine, system and method. In one specific embodiment, the test all-in-one machine comprises a signal generator, a directional coupler, a first measurement receiver, a second measurement receiver, an output interface and an input interface, the signal generator outputs a first signal to the injection probe through the directional coupler and the output interface in sequence; the first signal is a continuous wave signal and / or a pulse signal; the directional coupler collects a first signal output by the signal generator to obtain a collected signal and outputs the collected signal to the first measurement receiver; the first measurement receiver measures the power of the acquisition signal from the directional coupler; the second measurement receiver measures a measurement current output by the first end of the second calibration clamp or the monitoring probe through the input interface in response to the first signal output by the injection probe, the measurement current being at least from the first signal. According to the embodiment, the integration level is high, and the pulse modulation signal and the continuous wave signal are efficiently tested.

In an embodiment, a method for performing foreign object detection (FOD) testing of a wireless power transmitter includes: placing a foreign object (FO) between the wireless power transmitter and a wireless power receiver; beginning to wirelessly transmitting power from the wireless power transmitter towards the wireless power receiver; a predetermined amount of time after beginning to wirelessly transmit power, measuring an FO temperature indicative of a temperature of the FO, a transmitter temperature indicative of a temperature of the wireless power transmitter, and a receiver temperature indicative of a temperature of the wireless power receiver; determining a weighted average temperature based on the measured transmitter temperature and the measured receiver temperature; and when a difference between the measured FO temperature and the weighted average temperature is higher than a threshold temperature, asserting an error flag indicative that the FOD test failed.

The application relates to the technical field of electromagnetic test, and discloses a system-level HIRF radiation and conduction sensitivity comprehensive test device and method.The device comprises an electric wave darkroom and a test equipment, the electric wave darkroom is located beside a control room, a transmitting antenna and an optical fiber line are arranged in the electric wave darkroom; the transmitting antenna is used for radiating signals, the optical fiber line connects the inside of the electric wave darkroom and the control room, the control room is located in an external independent area, a signal generator, a power amplifier, a directional coupler, a power meter, a measurement receiver, an optical-electricity converter and a comprehensive test control system are arranged in the control room.The application realizes high-precision sensitivity evaluation of an airplane system in a real HIRF coupling scene by constructing a comprehensive test environment with synchronous radiation and conduction, combining with accurate calibration of test levels based on normalized transfer functions of full-machine test data, and adopting a standardized probe layout and an anti-interference measurement link.