39results about How to "Solve signal distortion" patented technology

The invention discloses a structure of a photoelectric composite flame-proof high-voltage cable and a preparation method thereof, belonging to the filed of cables. The structure comprises three high-voltage power line cores, a control cable core, an earthing cable core, an optical cable, three reinforcing cores, a reinforcing layer, an inner sheath and an outer sheath which are stranded into a cable according to cable structure design requirements. The cable provided by the invention has the advantages that the voltage-level of the cable is improved, the optical signal transmission can be carried out, the signal distortion problem of the cable in laying space, signal transmission and conversion is solved, the difficulty that the cable is easy to fracture in cable laying in a complex state is solved, further the service life of the cable is prolonged, and the cable provided by the invention also has the advantages of simple structure and simple process, and is easy to popularize.

A video process device includes: a display device rotatable with respect to a center point of a screen; a first screen dividing portion for processing first and second video signals into a double window video signal; a second screen dividing portion for processing the double window video signal and an inputted third video signal into a triple window video signal; and a controller for controlling the second screen dividing portion in order to transform a vertical and horizontal synchronization signal of the first, second and third video signals to correspond to the screen of the display device rotated by 90 DEG when the display device is rotated by 90 DEG . Accordingly, by realizing the triple window in consideration of the aspect ratio of 16:9 of the display device, problems such as image quality deterioration and signal distortion can be solved. Also, the opportunity to watch various broadcasting can satisfy a user's needs.

The invention relates to a method for applying radio feedback technique in power amplifier, while prior radio power amplifier widely used in wireless communication emitter can resolve signal aberration problem effectively, while pre-aberration technique and passive-feedback technique can not effectively resolve the problem. The invention comprises a casing and a circuit board, wherein one side of the casing is provided with a radio output, a radio input, a detection input, and a power input, the bottom of the casing is provided with a plurality of insulation chambers with an internal circuit board, the feedback amplifier mainly comprises two amplifiers (main amplifier and error amplifier), a directional coupler, a delay line, and a loop control network, while the directional coupler distributes and combines powers, the delay line confirms the feedback amplifier works stably in wide band, and the loop control network confirms the correct counteraction between signal and aberration. The invention has stable property, which can effectively resolve signal aberration, with side application, flexible operation or the like.

The invention discloses a system for testing turn-to-turn short circuit of a rotor winding of an automobile turbine generator, which consists of an upper structure and a lower structure in mutual communication connection through Ethernet. The lower structure comprises a magnetic flux detector mounted in a motor and an embedded PC104 data acquisition unit located near a generator, data acquisition is carried out on stimulation signals output by the magnetic flux detector through the data acquisition unit, and the acquired digital signals are transmitted to an upper industrial personal computer through Ethernet; the upper structure of the system comprises an industrial personal computer, a display and a printer, the industrial personal computer controls the data acquisition unit remotely through Ethernet to complete data acquisition and transmission, then analyzes and diagnoses received data, and displays and prints the diagnosis result and acquired waveforms. In the invention, advanced Ethernet communication and embedded PC technology are adopted to realize digital signal-based remote transmission, thus greatly improving the fault diagnosis accuracy and working reliability of the test system on turn-to-turn short circuit of the rotor winding.

The present invention is related to a capacitive touch device and excitation signal generating circuit and method thereof. The excitation signal generating circuit is connected to multiple sensing traces of the capacitive touch device, and has a storage unit storing at least one set of digital data. Each set of digital data is corresponding to a frequency. The PDM signal generator reads the set of digital data and converts the read set of digital data to a PDM signal according to the frequency of the read set of digital data. The PDM signal is recovered to an analog excitation signal since the PDM signal passes through a current transmission path, which is equivalent to a low pass filter. Therefore, the present invention can decrease a distortion of the sensing signal to increase accuracy of the sensing signal and to save power.

The invention provides a liquid crystal display panel and a method of manufacturing and restoring the same. The liquid crystal display panel comprises vertically and horizontally staggered grids and data lines, a horizontal common electrode line, a grating insulating layer on the grating, a metal-oxide semiconductor layer on the grating insulating layer, an etching barrier layer on the metal-oxide semiconductor layer, a source electrode, a drain electrode, a JAS layer, a second metal connecting line which is connected with a longitudinal common electrode, and a pixel electrode, wherein the horizontal common electrode line and the grading are formed at the same time; the source electrode and the drain electrode are electrically connected with the metal-oxide semiconductor layer; and the JAS layer covers the source electrode, the drain electrode, the second metal connecting line and a data line. The liquid crystal display panel and the method of manufacturing and restoring the same can solve the problem that a current pixel is small in the aperture ratio and is distorted, thus reducing the time of signal transmission, avoiding distortion caused by signal delay, and at the same time can reduce the line layout surrounding a panel and save the space of the panel and the production cost.

The invention relates to a feedforward power amplifier with a predistortion power amplifier. The signal predistortion problem of the existing radio frequency power amplifier cannot be effectively solved. The feedforward power amplifier comprises a shell and a circuit board; a radio frequency output end, a radio frequency input, a monitoring input end and a power supply input end are arranged out of the shell; and the circuit board is arranged in the shell; the feedforward amplifier comprises a main amplifier and an error amplifier, a positioning coupler, a delay wire and a loop control network; the predistortion power amplifying system comprises an analog predistortion or digital predistortion; the analog predistortion way can be realized by SC1887 and diodes of the Scintera company, and the digital predistortion way is realized by the chip schemes of companies such as XILINX, OPTICHRON, NETLOGIC, TI, ADI and the like. The positioning coupler is used for allocation and synthesizing of the power; the delay wire ensures that the feedforward amplifier can work in a wide frequency band stably; and the loop control network ensures the correct offset of the signal and the distortion, thus, the feedforward power amplifier is applied to all of the communication systems.

The invention provides an image processing device, which comprises a virtual differential analog front end circuit. The front end circuit is used for receiving at least one image analog signal, and generates at least one digital signal. The virtual differential analog front end circuit comprises at least one conversion circuit, each conversion circuit comprises a clamper, an input buffer and an analog-to-digital converter, wherein when the number of the conversion circuits is larger than 1, various analog-to-digital converters receive the same comparative voltage.

The invention relates to a control method and system for filtering out power frequency interference signals. The control method comprises the steps of firstly rectificating an electrocardiosignal of apreset section of each channel; and then obtaining frequency, range and phase of the rectificated power frequency interference signals of the electrocardiosignal of the preset section, according to signal-to-noise ratio of each channel, obtaining the optimal power frequency interference signals of a system through weighting and estimating the frequency and the phase, and establishing sine waves by combining with the range of each channel; finally conducting subtraction treatment on the preset section of the electrocardiosignal and the reestablished sine wave signals, and accordingly obtainingthe electrocardiosignal without the power frequency interference. Therefore, the effect of filtering out the power frequency interference signals is achieved, ringing effect is not generated, so thatmeasurement is more accurate, and therefore the problem of signal distortion caused by the ringing effect generated due to using a wave trap in the existing filtering technology is solved.

The invention belongs to the technical field of semiconductor devices and provides a bidirectional semiconductor discharge tube and a preparation method thereof. The bidirectional semiconductor discharge tube comprises a substrate layer, and a first device layer and a second device layer which are respectively arranged at two sides of the substrate layer; and the structures of the first device layer and the second device layer are symmetrically arranged; the first device layer comprises a diffusion layer, an isolation layer, a metal layer, a plurality of cathode regions, and a heavily doped region; the diffusion layer has a second conductivity type; the isolation layer is used for dividing the diffusion layer into a valid anode region and an invalid anode region; the plurality of cathode regions have a first conductivity type; the heavily doped region is arranged between the valid anode region and the isolation layer; and the heavily doped region has a first conductivity type. According to the bidirectional semiconductor discharge tube and the preparation method thereof of the invention, the heavily doped region with the doping concentration greater than the doping concentration ofthe substrate layer is arranged between the valid anode region and the isolation layer, so that the bidirectional semiconductor discharge tube still has a low capacitance capability when meeting a breakdown voltage, and the problem that signal distortion is easily caused by high capacitance of a TSS device in a communication line is solved.

The invention provides an undistorted signal processing method based on a superposed window. The undistorted signal processing method comprises the following steps: step 1, dividing a to-be-processeddata signal into a first path of data signal and a second path of data signal; 2, windowing the first path of data signal by adopting an original window function; 3, obtaining a complementary window function according to the original window function and a preset overlapping scale factor; 4, respectively carrying out delay processing on the complementary window function and the second path of datasignal; 5, windowing the second path of data signal after delay processing by adopting the complementary window function after delay processing; and 6, adding the windowed first path of data signal and second path of data signal to obtain an undistorted signal. The invention further provides a storage medium and a system. According to the invention, under the condition that a certain overlapping ratio is guaranteed, the calculated amount is reduced, and meanwhile the distortion problem of data signals in the windowing process is avoided.

The invention provides an optical receiving chip. The optical receiving chip comprises an input coupling unit, a polarization rotation unit, a photoelectric detection unit, a first transmission waveguide and a second transmission waveguide; an optical signal has input TE polarized light and / or input TM polarized light; the polarization rotation unit can rotate the input TE polarized light by 90 degrees to convert the input TE polarized light into output TM polarized light, and can rotate the input TM polarized light by 90 degrees to convert the input TM polarized light into output TE polarizedlight; the first transmission waveguide is used for transmitting the input TE polarized light and / or the input TM polarized light from the input coupling unit to the polarization rotation unit; the second transmission waveguide is used for transmitting the output TE polarized light and / or the output TM polarized light from the polarization rotation unit to the photoelectric detection unit; and the total length of the first transmission waveguide is equal to the total length of the second transmission waveguide. The optical receiving chip provided by the invention can realize polarization-independent optical signal receiving.

The invention relates to the technical field of electrocardio signal processing, and discloses an electrocardio artifact signal removing method. The method comprises the following steps: S1, collecting an original electrocardio signal, and identifying feature points on the original electrocardio signal; S2, performing fitting according to the feature points to obtain an artifact signal, and subtracting the artifact signal from the original electrocardiosignal to obtain an artifact-removed electrocardiosignal; S3, judging whether the quality parameter of the electrocardiosignal subjected to artifact removal meets a preset condition or not, if so, turning to S4, otherwise, correcting the feature points, and then turning to S2; S4, taking the original electrocardiosignal as an input, taking the electrocardiosignal after artifact removal as a label, and sending the label to a neural network for training to obtain an artifact removal model; and S5, performing artifact removal on the to-be-processed electrocardiosignal according to the artifact removal model. The method has the technical effects that signal distortion cannot be caused after artifacts are removed, and the artifact removing precision is high.

The invention discloses a visible light communication system. The visible light communication system comprises an LED illumination device, a driving circuit and a plurality of transmission branches, wherein the driving circuit is used for providing a driving signal to the LED illumination device; the driving circuit comprises a plurality of driving units; the plurality of transmission branches are connected with the driving circuit and the LED illumination device; the transmission branches correspond to the driving units one by one; the phase difference between at least two phases in driving signals output by each driving unit is (0, 2pi) and does not comprise an endpoint value, namely the driving signals output by each driving unit are completely different so that the phenomenon that current in all the transmission branches reaches the peak value at the same time is avoided when the driving signals are provided to the LED illumination device by using the driving circuit, and furthermore, the phenomenon that the driving current of the LED illumination device is too great or too small is effectively avoided; a signal distortion phenomenon in a process of realizing communication by using an LED is solved.

The invention aims at providing a device for monitoring coal position of a coal mill through a multiquadrant noise method. The device comprises the coal mill, 4N*(N ranges from 1 to 4) piezoelectric ceramic pick-ups mounted at the outside of a steel barrel of the coal mill, and an external processor, wherein the peripheral sidewall of the steel barrel of the coal mill is quartered into four quadrant areas by treating an axis of the steel barrel of the coal mill as the center; N*(N ranges from 1 to 4) piezoelectric ceramic pick-ups are uniformly adhered in each quadrant area; an inclinometer is mounted on each piezoelectric ceramic pick-up; the external processor is connected with each piezoelectric ceramic pick-up and used for reading and recording an electric signal output by each piezoelectric ceramic pick-up in order to determine the coal position of the coal mill.

A driving method for an LCoS (Liquid Crystal On Silicon) display chip is characterized in that an external controller of the chip transmits data including image information to a shift register of the chip according to the requirement for resolution factor of the chip, the shift register temporarily stores the data in a latch, a comparator module compares the data with synchronous data signals of external DA output analog voltage, if the data is the same as the synchronous data signals through comparison, the corresponding DA analog voltage is stored in pixel units in a pixel array and read out from the pixel units in a frame refreshing manner during display, so as to refresh the LCoS screen and obtain stable images on the screen, and when the display of one frame finishes, residual charges on the liquid crystal display are emptied through control of a line scanning module.

The invention discloses a low-capacity metal packaged silicon transient voltage suppressor and a manufacturing method thereof. The low-capacity metal packaged silicon transient voltage suppressor comprises a shell, an upper lead and a lower lead which are drawn out along two ends of the shell, and a transient voltage suppressor chip, a rectifier diode chip, a plurality of solder layers and two electrodes which are arranged in the shell, wherein the shell is made of glass Kovar alloy; the transient voltage suppressor chip is connected in series with the rectifier diode chip; a plurality of solder layers are arranged on two sides of the transient voltage suppressor chip and the rectifier diode chip respectively; the transient voltage suppressor chip and the rectifier diode chip also are connected with the electrodes respectively; and the two electrodes are connected with the upper lead and the lower lead respectively. The low-capacity metal packaged silicon transient voltage suppressor has the functions of a transient voltage suppressor and a rectifier diode simultaneously, has the advantages of small size, light weight, low manufacturing cost and low junction capacity, and is particularly suitable to serve as a protective device in high frequency lines.

A video process device includes: a display device rotatable with respect to a center point of a screen; a first screen dividing portion for processing first and second video signals into a double window video signal; a second screen dividing portion for processing the double window video signal and an inputted third video signal into a triple window video signal; and a controller for controlling the second screen dividing portion in order to transform a vertical and horizontal synchronization signal of the first, second and third video signals to correspond to the screen of the display device rotated by 90 DEG when the display device is rotated by 90 DEG . Accordingly, by realizing the triple window in consideration of the aspect ratio of 16:9 of the display device, problems such as image quality deterioration and signal distortion can be solved. Also, the opportunity to watch various broadcasting can satisfy a user's needs.

The application discloses a signal transmission method, device and computer-readable storage medium of a high-speed differential signal line of a circuit board. Among them, the method includes calculating the dielectric constant of the glass fiber strip and the gel prepreg according to the equivalent dielectric constant of each type of plate, the proportion of glass fiber cloth and the proportion of resin, and is used to determine whether to cover the glass fiber strip Distinguish the dielectric constant of the first area and the second area; automatically generate the transmission rate information of each signal transmission line in the high-speed differential signal line according to the glass fiber cloth density of the current model plate, the dielectric constant of the first area and the second area , determining the wiring path of the high-speed differential signal line according to the transmission rate information, so as to perform high-speed signal transmission based on the wiring path. On the basis of not increasing the manufacturing cost of the circuit board, it can effectively solve the impact of glass fiber effect on high-speed differential signal transmission, and ensure that the signal received by the receiving end does not have distortion caused by different signals arriving at the same time.

The invention discloses a time-stretching analog-to-digital conversion method and system based on radio frequency signal delay photon, and relates to a radio frequency signal delay photon time-stretching analog-to-digital conversion system, comprising: a mode-locked laser and a first dispersive fiber , optical beam splitter, first Mach-Zehnder modulator, second Mach-Zehnder modulator, RF signal generator, RF delay unit, second dispersive fiber, third dispersive fiber, first wave decomposition complex device, second wave demultiplexer, first photodetector, second photodetector, third photodetector, fourth photodetector, fifth photodetector, sixth photodetector, seventh photodetector detector, eighth photodetector, electrical ADC array, digital signal processing module. The invention solves the problem of signal distortion caused by the spectral overlap of adjacent channels of the wave decomposition multiplexer in the continuous-time photonic time-stretching analog-to-digital conversion system, and improves the performance of the continuous-time photonic time-stretching system.

The invention discloses an intelligent service management system based on cloud computing. One path of the carrier signal receiving circuit accesses a time reference carrier signal when the cloud server normally receives the carrier signal through the RC frequency selection circuit; the other path generates a reference carrier frequency signal through an oscillation circuit; frequency fine tuningis carried out through control of a tuning circuit; resonance with a to-be-measured carrier frequency signal received by a cloud server in real time is realized; the offset calculation circuit calculates a frequency difference 1 between a reference carrier signal and a to-be-measured carrier signal through the first frequency difference circuit. The frequency difference 1 higher than 1000kHz is added to the second frequency difference circuit; a frequency difference 2 between the reference carrier signal and the frequency difference 1 is calculated and feeds bak to the first frequency difference circuit so as to reduce the the frequency difference 1; and the frequency voltage conversion circuit receives the frequency difference 1 through the low-pass filter, converts the frequency difference 1 into voltage, and adds the voltage as control voltage to a carrier modulation circuit of the data terminal transmitter to adjust a carrier signal transmitted by the transmitter.

The invention discloses an intelligent service management system based on cloud computing. One path of the carrier signal receiving circuit accesses a time reference carrier signal when the cloud server normally receives the carrier signal through the RC frequency selection circuit; the other path generates a reference carrier frequency signal through an oscillation circuit; frequency fine tuningis carried out through control of a tuning circuit; resonance with a to-be-measured carrier frequency signal received by a cloud server in real time is realized; the offset calculation circuit calculates a frequency difference 1 between a reference carrier signal and a to-be-measured carrier signal through the first frequency difference circuit. The frequency difference 1 higher than 1000kHz is added to the second frequency difference circuit; a frequency difference 2 between the reference carrier signal and the frequency difference 1 is calculated and feeds bak to the first frequency difference circuit so as to reduce the the frequency difference 1; and the frequency voltage conversion circuit receives the frequency difference 1 through the low-pass filter, converts the frequency difference 1 into voltage, and adds the voltage as control voltage to a carrier modulation circuit of the data terminal transmitter to adjust a carrier signal transmitted by the transmitter.

The present invention provides a network connection method based on visible light communication, including: LED lights for visible light communication indoors; placing wireless communication equipment in the coverage area of visible optical communication network and connecting to visible light communication networks to make wireless communicationThere are multiple network connection lines in the device connection; select the shortest optical line from multiple network connection lines as communication lines, and block other network connection lines.By selecting a wireless communication device to select a network connection line with the shortest optical range for communication and blocking other network connection lines, the wireless communication equipment can only receive one network connection line, so as to avoid errors caused by multiple network connection lines and other errors.At the same time, the connected lines will not reflect on objects such as wall surfaces, which not only ensure the transmission speed, but also ensure the strength and accuracy of the signal.Solved the problem of signal distortion or error caused by the existing visible light communication due to multi -diameter effects.

The invention relates to a laser controller for simultaneously controlling pulse width and frequency, which mainly solves the problem of different technical parameters of different lasers in the prior art, especially different trigger signals required by different lasers. The laser energy and frequency triggered by different lasers are also different. At the same time, the problem of different laser parameters required for laser cutting of materials of different materials is solved. The present invention adopts an adjustable laser controller, adjusts the frequency and pulse width of the signal output from the laser controller to the laser according to different lasers to ensure the quality of laser cutting, better solves the above problems, and can be widely used in laser processing equipment.

The invention provides an image processing device, which comprises a virtual differential analog front end circuit. The front end circuit is used for receiving at least one image analog signal, and generates at least one digital signal. The virtual differential analog front end circuit comprises at least one conversion circuit, each conversion circuit comprises a clamper, an input buffer and an analog-to-digital converter, wherein when the number of the conversion circuits is larger than 1, various analog-to-digital converters receive the same comparative voltage.

The invention provides a network connection method based on visible light communication. The method comprises the following steps: arranging an LED lamp for visible light communication indoors; arranging the wireless communication equipment in a coverage area of the visible light communication network and enabling the wireless communication equipment to be connected with the visible light communication network, so that the wireless communication equipment is connected with a plurality of network connection lines; and selecting the network connection line with the shortest optical path from the plurality of network connection lines as a communication line, and shielding other network connection lines. The wireless communication equipment selects one network connection line with the shortest optical path for communication and shields other network connection lines, so that the wireless communication equipment can only receive one network connection line, and errors such as messy codes caused by receiving a plurality of network connection lines are avoided; and meanwhile, a connected line cannot be reflected on objects such as a wall surface, so that not only is the transmission speed ensured, but also the signal strength and accuracy are ensured. The problem of signal distortion or error caused by a multipath effect of existing visible light communication is solved.

The present application relates to an SRS transmission method, device, equipment, system and storage medium. The base station allocates the period information of the corresponding uplink SRS symbol to be extracted and the downlink time slot parameters for each remote radio unit, so that each remote radio unit extracts the SRS symbol and inserts the SRS symbol into the corresponding downlink subframe, and then The SRS can be transmitted back to the base station through the corresponding downlink time slot; each radio remote unit corresponds to each downlink time slot parameter one by one. Based on this, when multiple remote radio units RRU receive the SRS symbols of the uplink time slot at the same time, they can move their respective SRS symbols to the corresponding downlink time slots and rearrange them, and then send them back to the base station for analysis; each remote radio unit uses The corresponding downlink time slots transmit SRS symbols back and forth, so that the base station can distinguish the source of SRS, solve the problem of signal distortion caused by SRS superposition on multiple remote radio units, and achieve the base station's uplink channel of each remote radio unit Quality is performed for precise performance evaluation and control purposes respectively.

The invention provides a wavelet packet decomposition valve inner leakage signal noise reduction method. The method comprises the steps: acquiring a pipeline valve inner leakage signal containing noise; carrying out wavelet packet decomposition on the pipeline valve inner leakage signal containing the noise to obtain a plurality of wavelet packet coefficients; establishing different wavelet packet coefficient threshold models according to the parity of wavelet packet decomposition layers, wherein specifically, when the number j of decomposition layers is an odd number and when the number j of decomposition layers is an even number, T is a wavelet packet coefficient set threshold, sigma n is the standard deviation of noise, and N is the number of signal samples; reconstructing the valve inner leakage signal according to the thresholded wavelet packet coefficient. The invention further provides a wavelet packet decomposition valve inner leakage signal noise reduction device and system, the stability of valve inner leakage signal noise reduction is effectively improved, and the accuracy and reliability of valve inner leakage signal detection are improved.

The invention discloses a pre-distortion method and device based on a visible light communication system. The method comprises the following steps: acquiring a modulation signal; and performing inverse transformation on the modulation signal through a pre-distortion inverse transformation model, wherein the modulation signal acquires a linear signal after passing through an LED. The problem that the distortion correction technology is low in precision and high in complexity in the existing VLC system is solved, the method has the advantages of being simple in structure and low in complexity, and the operation resource of the system can be saved.

The present invention provides a kind of distortion-free signal processing method based on overlapping and windowing, comprising: step 1, dividing the data signal to be processed into the first data signal and the second data signal; step 2, using the original window function Windowing the first data signal; step 3, obtaining a complementary window function according to the original window function and a preset overlapping scale factor; step 4, performing delay processing on the complementary window function and the second data signal respectively; step 5. Use the complementary window function after delay processing to window the second data signal after delay processing; Step 6. Add the first data signal and the second data signal after windowing to obtain a distortion-free signal . The invention also provides a storage medium and system. The present invention reduces the amount of calculation while ensuring a certain overlapping ratio, and at the same time avoids the problem of distortion of data signals in the process of windowing.