500 results about "Signal reflection" patented technology

The invention discloses a lineation robot control system based on a satellite positioning and orientation technology, which relates to the technical field of robot motion control and comprises a satellite positioning and orientation module, an inertial navigation module, a fusion positioning and orientation software module, a motor control software module, a motion control software module and a pattern planning software module. The satellite positioning and orientation module is used for acquiring latitude and longitude coordinates of the current position of the robot by receiving multi-frequency satellite signals; the inertial navigation module is used for collecting posture and motion data of the robot in real time through a gyroscope and an accelerometer. According to the lineation robot control system provided by the invention, through collaborative design of the multi-frequency-point GNSS receiver and the anti-multipath interference antenna array, centimeter-level continuous positioning capability in a complex urban environment is realized, and satellite signal reflection and shielding interference in scenes such as viaducts and avenues are effectively overcome; and satellite positioning and inertial navigation data are deeply fused through a tight coupling Kalman filtering algorithm.

The invention relates to the technical field of cable anti-interference, and discloses a high-frequency coaxial cable anti-interference method and device.The method comprises the steps that a radial progressive impedance gradient double-layer shielding structure with an inner shielding layer and an outer shielding layer is constructed, and a triangular supporting frame structure is arranged between the inner shielding layer and the outer shielding layer; an electromagnetic induction probe is installed on the triangular supporting frame structure, and differential interference signals between the inner shielding layer and the outer shielding layer are collected; performing time-frequency domain conjoint analysis on the differential interference signal to obtain an interference source feature mapping map; and performing multi-mode interference identification and suppression according to the interference source characteristic mapping map to generate an interference offset signal, and performing real-time elimination and feedback on electromagnetic interference in the inner shielding layer and the outer shielding layer based on the interference offset signal to obtain an interference offset feedback effect. And signal reflection and crosstalk among the structures of all layers in the cable are effectively compensated.

The invention discloses a power supply communication method and device based on power line carrier communication, and relates to the technical field of power supply communication. Problems of signal attenuation, insufficient anti-interference capability, insufficient stability of power supply communication, insufficient intelligent path switching capability and the like exist in the prior art. According to the method, high-sampling-rate PSD analysis, STFT and LSTM are adopted to predict noise power time sequence data, and a noise-load rate coupling model is established; secondly, based on a transmission line theory, researching channel time-varying characteristics, calculating signal reflection and multipath effects, and calculating channel coherence time through a sliding window; for signal attenuation, low, medium and high frequency band models are respectively established, path attenuation is calculated, and channel capacity is optimized; and finally, through real-time stability analysis, short-term and long-term SNR stability is calculated, and path selection is optimized in combination with a load rate, so that communication quality is ensured. And through integration of channel modeling, time-varying analysis and path optimization, the reliability and stability of power line carrier communication are improved.

The invention discloses a GPU hot plug method, device and equipment and a storage medium, and relates to the technical field of computers, and the method comprises the steps: processing an initial surge current peak value based on a reverse compensation signal generated by an initial power phase difference between a mainboard and a GPU, and determining a to-be-optimized network signal based on an obtained target surge current peak value and an initial network signal; adjusting the initial signal reflection coefficient of the to-be-optimized network signal by using the programmable LC array, optimizing the to-be-optimized network signal by using the obtained target signal reflection coefficient, performing protocol compatibility processing on the mainboard and the GPU based on the obtained target network signal, and diagnosing the obtained target GPU. And after the obtained diagnosis result represents that the diagnosis is passed, performing hot plugging by using a preset plugging protocol, a GPS synchronous clock and a prediction result of the temperature, the load and the surge current peak value of the target GPU predicted by the prediction model. In this way, the security of executing the GPU hot plug operation can be improved.

The invention relates to the technical field of data processing, and provides a data processing method for testing avionics equipment, which comprises the following steps of: testing a communication optical cable of an aircraft communication system through an optical time domain reflectometer; analyzing the deviation between the loss value of the reflection intensity of the optical signal at each moment and the reflection loss threshold value to obtain the fault probability of the optical cable in the monitoring time period; analyzing the difference between the moment when the optical signal reaches the bending position of the optical cable and the moment corresponding to the peak point, and obtaining the reflection unpredictability of the optical signal in the monitoring time period; combining the light source power difference to obtain an optical cable performance error in the monitoring time period; obtaining the extra loss degree of the optical cable in the monitoring time period by combining the change condition of the temperature data; determining a test result correction coefficient of the monitoring time period; and correcting the reflected signal oscillogram, and testing the communication optical cable. The invention aims to solve the problem that the actual performance judgment of the optical cable is influenced by the fine change interference of various factors in the optical signal propagation process of the communication optical cable.

The invention relates to the field of audio playing control, in particular to an audio playing control method and device, equipment and a storage medium. The method comprises the following steps: acquiring a real-time playing audio signal and a spatial multi-angle reflection audio signal; performing one-by-one angle signal reflection time calculation and audio spatial three-dimensional form modeling on the spatial multi-angle reflection audio signals to construct a three-dimensional audio spatial form model; performing spatial angle reflection attenuation evolution on the spatial multi-angle reflection audio signals one by one, and performing spatial audio attenuation correction based on the three-dimensional audio spatial form model so as to obtain spatial attenuation compensation audio signals; and carrying out audio rhythm fluctuation analysis on the spatial attenuation compensation audio signal, and carrying out deep audio semantic analysis so as to obtain an audio semantic feature of the audio signal. According to the invention, personalized audio playing is realized, the audio parameters are dynamically adjusted based on the environmental noise, and the audio experience of the user is improved.

Method for detecting a state of a connection between an electrically driven motor vehicle (1) and a corresponding charging station, wherein the motor vehicle (1) has a “Control Pilot (CP)” function with a vehicle-side “Control Pilot (CP)” line (3), characterized in that a length of a “Control Pilot” line between the motor vehicle and the charging station is measured by means of a “Power Line Communication” (PLC) chip (4), wherein the length of the “Control Pilot” line between the vehicle and the charging station using signal reflection and signal attenuation or -runtime is measured, wherein the PLC chip (4) sends a signal along the CP line between the motor vehicle and the charging station and receives the signal reflected at the end of the CP line between the motor vehicle and the charging station and running back to the PLC chip (4), wherein the length of the path traversed by the signal is determined based on the signal runtime, wherein the length of the CP line between the motor vehicle and the charging station is clearly determined from the distance traveled by the signal and a specific cable type is determined based on the length of the CP line between the motor vehicle and the charging station.

The invention relates to a single-layer waveguide antenna structure which is formed by splicing a PCB main board and a waveguide board, a stand column-mushroom pin composite structure is arranged in the single-layer waveguide antenna structure, mushroom pins are arranged in the PCB main board, stand columns are arranged in the waveguide board, and a transmission waveguide wall, a radiation waveguide wall and a grounding layer are further arranged in the PCB main board; a transmission waveguide cavity and a radiation cavity are also arranged in the waveguide plate; the transmission waveguide wall, the mushroom pin, the transmission waveguide cavity and the stand column form a closed waveguide cavity, and the transmission waveguide wall serves as a bottom H face of the waveguide cavity, so that a single-layer waveguide antenna structure is achieved. By the adoption of the single-layer waveguide antenna structure, the bottleneck problems of high-frequency signal reflection loss, adjacent channel coupling crosstalk and the like caused by a heterogeneous material interface and sensitive assembly tolerance between a traditional waveguide system and a PCB are solved, the number of stand columns in a waveguide plate can be effectively reduced, and the manufacturing difficulty of the waveguide plate can be simplified.

The invention discloses an optical cable state intelligent monitoring system and method, and belongs to the technical field of optical cable state evaluation, and the method specifically comprises the steps: collecting optical cable related data in real time, including the structural parameters and optical signals of an optical cable, and carrying out the preprocessing of the collected optical cable related data, calculating the state of an optical cable power transmission line according to the preprocessed optical cable related data, and evaluating the state of the optical cable power transmission line; multiple factors such as optical signal reflection intensity, optical cable structure parameters, environmental data and bending influence are combined to form a comprehensive overall state evaluation model, the overall state of an optical cable line can be evaluated more comprehensively by integrating multiple influence factors, adjustment and optimization can be carried out according to different lines, equipment and environmental conditions, and the overall state of the optical cable line can be evaluated more comprehensively. And the requirements in different scenes are met.

The embodiment of the invention provides communication equipment and a communication method, which are applied to the technical field of wireless communication. The communication device comprises a control circuit, a radio frequency integrated circuit and an antenna structure. The radio frequency integrated circuit is used for transmitting and / or receiving a radio frequency signal based on the antenna structure. And the control circuit is used for switching the working parameters of the antenna structure hardware from the current first parameter value to the second parameter value. And outputting a first parameter control signal according to the device state information of the communication device under the first parameter value and the second parameter value, wherein the first parameter control signal is used for updating and setting the hardware working parameter of the antenna structure as the first target parameter value. The hardware working parameters comprise the impedance size of the antenna structure and / or the aperture size of the antenna structure, and the equipment state information at least comprises a signal reflection coefficient of the antenna structure. According to the embodiment of the invention, high-precision optimization of the communication performance of the antenna structure is realized.

Certain aspects of the present disclosure provide techniques for wireless communications. One example method includes receiving, from a backscatter device, a spatial multiplexing capability report; transmitting, to the backscatter device, a reference signal reflection configuration; and transmitting, to the backscatter device, a transmission grant for a backscatter link.

This application discloses an antenna system comprising a first radiating source, a second radiating source, a reflecting device, and a first transmitting device. The transmitting ports of the first and second radiating sources are arranged opposite to each other along the same axis, and the reflecting surface of the reflecting device is positioned opposite to the first transmitting device. The first radiating source transmits a first signal to the reflecting surface of the reflecting device; the reflecting device reflects the first signal through the reflecting surface to the annular transmission region of the first transmitting device; the first transmitting device radiates the first signal reflected by the reflecting surface out of the antenna system through the annular transmission region; the second radiating source transmits a second signal, which is radiated out of the antenna system through the area formed by the inner diameter of the annular transmission region. This achieves common-aperture radiation of signals from different transmitting ports with independent radiation paths, improving the radiation efficiency of the antenna system.

The invention relates to the technical field of FPC (Flexible Printed Circuit) laminated structure optimization, in particular to a module FPC laminated structure optimization system based on signal integrity, which comprises a laminated parameter sensitivity extraction module used for defining the thickness of a dielectric layer, the thickness of a copper foil and a dielectric constant as closed interval values with upper and lower boundaries according to FPC design specifications. According to the method, the accumulated deviation area and the normalized confidence score are obtained in combination with integral operation, conversion from a frequency domain to a time domain and from qualitative analysis to quantitative evaluation is achieved, tiny flaws of impedance continuity are captured, inferior paths are screened based on the confidence score, and a physical junction area is positioned. The geometric gravity center of the deviation area is calculated to be matched with the slope and the length of the gradient line, a smoothly-transited geometric figure is constructed, structural compensation can be achieved in areas where impedance is prone to sudden change such as a reinforcing plate junction and covering film pressing, and signal reflection caused by physical sudden change of a stacked structure is eliminated.

The utility model provides a communication signal enhancement reflector based on open source hardware, which relates to the technical field of signal reception, and comprises a bottom plate arranged at the lowest part, a reflection pot is arranged above the bottom plate, an expansion device is arranged on the back of the reflection pot, the expansion device comprises a containing groove, the containing groove is connected with the reflection pot in a sliding manner, and the bottom plate is provided with an opening. The storage groove is in an arc shape, and a cavity is formed in the storage groove. According to the communication signal enhancement reflector based on the open source hardware, by arranging the storage groove, when a signal is weak and signal strength needs to be enhanced, the arc-shaped electric push rod drives the storage groove to move, and the arc-shaped reflection plate extends out of the storage groove through flow guide of the arc-shaped flow guide block in the movement process of the storage groove; therefore, the area of the reflection pot capable of receiving reflection signals is increased, the reflection quantity of the signals is improved, the wave gathering tube can receive more signals, and the purpose of enhancing the reflection intensity of the signals is achieved.

The invention discloses a Beidou GNSS-R-based strong wind disaster monitoring and early warning method, and the method comprises the steps: 1, enabling an unmanned plane to carry GNSS-R receiving equipment to be located at the periphery of a strong precipitation region, carrying out the wind speed detection of an internal water surface, and carrying out the data calculation of an obtained satellite observation quantity; step 2, constructing an LSTM wind speed inversion model fused with two-factor decoupling, performing inversion prediction on the water surface wind speed of a reflection point area by inputting the received satellite observed quantity and a resolving result and performing error correction, and obtaining future time step wind speed prediction based on a past time step wind speed inversion result; step 3, establishing a boundary adaptive grid and a dynamically updated Kriging interpolation model, obtaining wind speed data of a specific signal reflection point missing area, and assisting wind speed data supplement of the reflection point missing area; and 4, constructing a wind speed time sequence extrapolation and inversion stability coordinated double-effect strong wind early warning strategy, judging whether strong wind is about to appear or not, and performing early warning.

A PCB bridge, used to interconnect two or more semiconductor chips for data communication, comprises: a plurality of metal strips; and a dielectric material disposed between the plurality of metal strips. The PCB bridge is used in a vertical direction within a semiconductor module to interconnect two or more semiconductor chips. By adjusting the dielectric material and trace width of the PCB bridge, the vertical direction of the PCB bridge provides flexible impedance matching. By matching the impedance to the source, the vertical direction of the PCB bridge prevents signal reflections. The trace length of the PCB bridge is limited by the spacing between the two semiconductor chips, which further limits the inductance of the PCB bridge traces.

The invention discloses an impedance matching method and system for chip testing, electronic equipment and a medium, and relates to the technical field of data processing. The method comprises the following steps: establishing electrical connection between a test probe and a to-be-tested chip test point, and sending a preset detection signal; acquiring incident power and reflection power of the detection signal; calculating a first signal reflection coefficient based on the incident power and the reflection power, and determining an impedance deviation value and an adjustment direction according to a difference value between the first signal reflection coefficient and a preset standard reflection coefficient; determining a parameter adjustment step length according to the impedance deviation value; sequentially adjusting a variable resistor, a variable capacitor and a variable inductor in the impedance matching network according to the step length and the adjusting direction; detecting a second signal reflection coefficient when the impedance real part and imaginary part of the variable element reach the target range; and judging whether the second signal reflection coefficient converges to a preset range, and if yes, taking the current matching network parameter as an impedance matching result. By implementing the technical scheme provided by the invention, the impedance matching accuracy of the chip test can be improved.

A system and method for early warning of solids pluggage in a gas-solid multi-phase flow through transport pipe. At least one doppler radar-based mass flow sensor measures reflections of signals from solid particles that are carried in a gas transport stream by the transport pipe from a solid particles feed source to a solid particles processing location. A controller detects conditions in the gas transport stream carrying the solid particles in the transport pipe that are representative of an early warning of pluggage of solid particles in the pipe as a function of information provided by the at least one doppler radar-based mass flow sensor.

The invention discloses a transmitting antenna, an antenna assembly and monitoring equipment, and relates to the technical field of antennae, the transmitting antenna comprises a feeder line, a helical antenna and a reflection column; the feeder line is provided with an inner-layer conductor and an outer-layer conductor which are coaxially arranged; one end of the spiral antenna is connected with the inner-layer conductor; the reflection column extends along the axis direction of the helical antenna; one end of the reflection column is connected with the outer conductor, and the reflection column is grounded. According to the scheme, a structure formed by combining the helical antenna and the reflection column is adopted, and the advantage that the cylindrical structure of the reflection column can provide a uniform reflection surface is fully utilized, so that electromagnetic waves are reflected in all directions in a balanced manner, the balance of signal reflection at all angle positions is improved, and a uniformly distributed electromagnetic field can be formed; therefore, most of energy is restrained near the signal receiving area of the transmitting antenna, so that the balance of signal strength in each direction is improved, the stability of signal transmission is improved, and a relatively ideal signal transmission effect can be obtained.

The invention belongs to the technical field of buildings, and particularly relates to a cable defect positioning and intelligent identification system and method based on a broadband impedance spectrum. The system comprises a vector network analyzer which can inject a sweep frequency excitation signal into a target cable to be detected, a high-precision receiver which is used for collecting signal reflection / transmission response so as to obtain full-band complex impedance spectrum data, and computer equipment which receives test data. The positioning method based on Nuttall-Kai ser mixed window and cepstrum coupling does not need to depend on an intact cable parameter database, is high in anti-interference capability, can accurately identify defect positions, and is high in positioning precision; the one-dimensional impedance spectrum is converted into the two-dimensional image through the GAF, the automatic identification of the defect type is realized by combining the residual neural network (ResNet), the manual intervention is reduced, and the automation degree is high; the deep feature learning capability of ResNet is utilized, and a CBAM attention module is combined, so that the capture of a fine defect mode is enhanced, and the recognition accuracy is improved.

The invention discloses a high-frequency signal detection device. The high-frequency signal detection device comprises a probe seat, a pair of grounding probes and at least one signal probe, wherein a pair of first mounting parts and at least one second mounting part are correspondingly arranged in the probe seat according to an element to be detected, the pair of first mounting parts are positioned on two outer sides of the second mounting part, and each grounding probe is mounted in each first mounting part and can capture at least one grounding signal after being in contact with the element to be detected. The signal probe is installed in the second installation part, and the signal probe has a design capable of reducing a dielectric constant, and can capture a high-frequency signal after being contacted with the element to be detected. Therefore, signal reflection loss caused by group reactance mismatching during application is reduced through the special design of the signal probe, so that the accuracy of bandwidth detection is improved.

The invention relates to the technical field of automatic charging, in particular to a charging pile automatic charging system based on self-adaptive infrared sensing. The method comprises the steps that an infrared sensing detection unit actively emits an infrared signal and receives a reflection signal, and based on infrared signal reflection echoes, target space orientation, distance and charging port position are obtained through time difference and signal intensity; the signal judgment and control unit judges whether a target enters a charging area or not, whether the target is accurately parked in place or not and whether a charging port is aligned or not on the basis of spatial position analysis and geometric feature matching of infrared sensing data, and generates a control instruction through the manifold elastic driving and geometric estimation control technology according to the judgment result. According to the invention, by introducing polarization phase entropy analysis, a multipath suppression algorithm and a nonlinear environment compensation mechanism, the problem that a traditional infrared sensor is easily interfered in complex environments such as rain and fog, high humidity, metal reflection and the like is effectively solved.

The invention relates to the technical field of basketball sports, and discloses a basketball shooting scoring system and an infrared induction mirror surface diffuse reflection detection method, and the system comprises an infrared emission module which is used for emitting an infrared signal; the infrared receiving module is used for receiving the reflected infrared signal; the mirror reflection structure module is used for reflecting the infrared beam at a preset angle; the data acquisition module is used for acquiring the state of the reflected optical signal; the trajectory analysis module is used for generating spectrum data, and the score output module is used for displaying shooting scores in real time; the method comprises the following steps: transmitting an infrared signal; receiving an infrared signal and generating disturbance data; forming a signal reflection and interference area; generating a path disturbance matrix; track analysis and feature extraction; track judgment and score feedback; and recording data and outputting a result. The design of combining the infrared transmitting module and the infrared receiving module is adopted, an infrared light path can be accurately constructed, and the basketball shooting track can be captured.

An injection device includes a cartridge configured to hold a volume of fluid, the cartridge having a proximal end and a distal end through which the fluid is dispensed; a stopper disposed in the cartridge and configured to move from the proximal end toward the distal end to cause the fluid to be dispensed through the distal end of the cartridge; and an electronic device disposed at the distal end of the cartridge, the electronic device including an emitter configured to transmit a signal toward the stopper, a receiver configured to receive reflections of the signal from the stopper, and a controller configured to wirelessly transmit data related to a position of the stopper in the cartridge.

The utility model discloses a high-frequency ceramic substrate which comprises a bottom plate. The RF transmission line is arranged on the bottom plate and is used for transmitting a radio frequency signal; the at least one chip inductor Lm is arranged on the bottom plate and is positioned on one side of the tail end of the RF transmission line; the chip inductor Lm is electrically connected with the RF transmission line and is used for impedance matching; the at least one matching resistor Rm is arranged on the bottom plate and is connected in series with the chip inductor Lm; one side of the tail end of the RF transmission line is grounded through the chip inductor Lm and the matched resistor Rm, and the other side of the tail end of the RF transmission line is used for being connected with the EML optical chip. After the ceramic substrate and the EML chip are packaged and integrated, resonance can be formed at 30GHz under the combined action of the chip inductor Lm and the parasitic capacitance of the EML chip, and the resonance can reduce high-frequency signal reflection, so that the 1dB bandwidth of a system is improved.

The utility model provides a vehicle-mounted antenna, which comprises at least two antenna arrays vertically arranged on a high-frequency printed circuit board; the phase shift feed network is fixed on the high-frequency printed circuit board and is connected with each antenna array; the first metal frame is arranged on the periphery of the high-frequency printed circuit board and surrounds the at least two antenna arrays, the first metal frame comprises a plurality of grid bars which are vertically arranged at intervals, and the surfaces, facing the antenna arrays, of the grid bars form signal reflecting surfaces; the first metal frame comprises a first frame surface and a second frame surface, and the area of a signal reflecting surface of the first frame surface is larger than that of a signal reflecting surface of the second frame surface; a first preset angle is formed between the first frame surface and at least one antenna array, a second preset angle is formed between the second frame surface and the corresponding antenna array, and the second preset angle is different from the first preset angle. The antenna can adjust the gain characteristic of the elevation section of the antenna, and achieves the effect of improving the gain of the low elevation section of the antenna.

The invention provides a container airtightness detection method and device, electronic equipment and a storage medium, and belongs to the field of intelligent detection, and the method comprises the steps: determining a contour region of a target container in a to-be-detected product image; extracting a first sound source signal in the contour area; determining a welding seam position area in the contour area; extracting a second sound source signal in the welding seam position area from the first sound source signal; and based on the second sound source signal, positioning a leakage point possibly existing on the target container. According to the container airtightness detection method and device, the electronic equipment and the storage medium provided by the invention, visual information and acoustic information are creatively and deeply fused, and a detected sound source signal is strictly limited in a welding seam position area where leakage is most likely to occur through two-stage progressive spatial filtering, so that the detection accuracy is greatly improved. Therefore, interference of environmental noise, signal reflection and non-critical area signals is greatly eliminated, and high-precision and high-reliability positioning of the leakage point of the container is realized.

The utility model discloses a rotating mirror radar and a cleaning robot, and the rotating mirror radar comprises a base which is fixedly provided with a signal transmitting module and a signal receiving module; the reflecting mirror assembly is rotatably arranged on the base and is provided with a first signal reflecting part and a second signal reflecting part; the signal transmitting module can transmit a first laser beam and a second laser beam, the signal transmitting module is arranged to be capable of transmitting the first laser beam emitted in the horizontal direction and the second laser beam inclining downwards relative to the horizontal plane, and the reflector assembly reflects the first laser beam in the horizontal direction. Distance detection can be carried out in the horizontal direction; the second laser beam is obliquely reflected downwards relative to the horizontal plane, close-range ground obstacle or cliff detection can be carried out, and detection of the two scenes is switched through rotation of the reflector assembly.

An injection device includes a cartridge configured to hold a volume of fluid, the cartridge having a proximal end and a distal end through which the fluid is dispensed; a stopper disposed in the cartridge and configured to move from the proximal end toward the distal end to cause the fluid to be dispensed through the distal end of the cartridge; and an electronic device disposed at the distal end of the cartridge, the electronic device including an emitter configured to transmit a signal toward the stopper, a receiver configured to receive reflections of the signal from the stopper, and a controller configured to wirelessly transmit data related to a position of the stopper in the cartridge.

The utility model provides a laser radar circuit and laser radar equipment, and relates to the technical field of laser radars. The laser radar circuit comprises a controller, a receiving module, a transmitting module and a digital processing module. The control module is electrically connected with the receiving module, the transmitting module and the digital processing module. The receiving module comprises a receiver and a matching capacitor. The capacitance value of a parasitic capacitor of the receiver is equal to the capacitance value of the matching capacitor. In the laser radar circuit provided by the invention, the capacitance value of the parasitic capacitor of the receiver is equal to the capacitance value of the matching capacitor, so that impedance matching can be more effectively realized, signal reflection and transmission loss can be reduced, noise in the circuit can be reduced, the signal-to-noise ratio of signals can be improved, electromagnetic interference can be effectively reduced, and the reliability of the laser radar circuit can be improved. The background noise of the optical receiver is effectively reduced, and the overall performance of the laser radar system is improved.