14 results about "Measuring receiver" patented technology

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.

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.

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 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.

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).

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.