57results about How to "Implement noise reduction processing" patented technology

The invention provides D-type pulping equipment which is based on airflow vortex and conducts stirring and pulping. The D-type pulping equipment mainly comprises a D-type feed cylinder device, an airflow vortex pulping device, a stirring pulping device and a fine pulp storage device. The D-type pulping equipment has the advantages of conducting air pulping, liquid pulping and filter pulping in sequence. According to the D-type pulping equipment which is based on the airflow vortex and conducts stirring and pulping, the airflow vortex pulping device achieves primary rotor-free airflow vortex smashing of smashed feed, the stirring smashing device achieves secondary stirring, decomposition and smashing of the smashed feed, and the fine pulp storage device achieves refining and screening of the smashed feed.

The invention discloses an extraction method for an in-phase axis slope in seismic data. The extraction method comprises the following steps that step one, the seismic data are acquired; step two, discrete curvelet transformation is performed based on the seismic data so that a series of curvelet transformation coefficients are obtained; step three, inverse transformation is performed based on the main curvelet transformation coefficient of a series of the curvelet transformation coefficients so that the curvelet carrying directional information is obtained; and step four, the in-phase axis slope is extracted according to the curvelet carrying the directional information. Another embodiment of the invention provides an application of the extraction method in seismic data processing and imaging. According to the extraction method, the accurate slope can be obtained so as to have great effect in seismic data processing and imaging.

An embodiment of the invention discloses a noise reduction method. The method comprises the following steps of acquiring a color value of a first sub-pixel point in an image to be processed and acquiring a first color value; determining a sub-pixel point possessing a same color channel with the first sub-pixel point in the image to be processed within a preset range taking the first sub-pixel point as a center and acquiring a second sub-pixel point; acquiring a color value of the second sub-pixel point and acquiring a second color value; and based on the first color value and the second colorvalue, adjusting the color value of the first sub-pixel point. The embodiment of the invention also discloses noise reduction equipment and a computer readable storage medium. Noise reduction processing is performed on a Bayer format image so that a noise influencing image quality is fundamentally eliminated and output image quality is guaranteed.

The invention discloses a voice signal acquisition device and method. The device comprises a laser interference measurement system, a sound receiving device and a processing system, wherein the laser interference measurement system is used for sending detection light to a vibrating surface of a target, receiving return light reflected from the vibrating surface of the target and obtaining a vibrating signal characterizing the surface vibration of the target through a mixing interference signal obtained by merging the return light and reference light; the sound receiving device is used for collecting sound on the direction of the target; and the processing system is used for performing calculation according to the vibrating signal to obtain a first sound signal frequency spectrum, performing calculation according to the signal collected by the sound receiving device to obtain a second sound signal frequency spectrum, and performing filtering processing on the second sound signal frequency spectrum through the first sound signal frequency spectrum, and performing restoration to obtain a sound signal generated by the target. By adoption of the voice signal acquisition device and method disclosed by the invention, noise reduction processing during the sound acquisition is realized. The interference of background noise can be reduced, and the sound of the target can be obtained more effectively.

The invention discloses a new energy vehicle, an active noise reduction method and system thereof. The active noise reduction method of the new energy vehicle includes the following steps that: the operating parameters of the new energy vehicle are acquired, and the frequency of in-vehicle environmental noise signals associated with the operating parameters are obtained according to the operatingparameters, wherein the operating parameters comprise at least the motor rotation speed of the new energy vehicle, wherein the motor rotation speed is in a corresponding relation with the frequency ofthe in-vehicle environmental noise signals; based on the frequency of the in-vehicle environmental noise signals, a preset structural sound database is called to obtain structural sound signals corresponding to the in-vehicle environmental noise signals; and a sound playing module disposed on the new energy vehicle outputs the structural sound signals, and the structural sound signals and in-vehicle environmental noise signals are fused, so that noise reduction processing can be performed on an in-vehicle environment. The active noise reduction method is easy to implement, simple to operate,and is convenient for a user to use.

The embodiment of the invention provides a sound denoising method and device, and relates to the technical field of audio processing. The method comprises the steps: obtaining first sound data of a current sampling point; obtaining second sound data, wherein the second sound data is the data collected at second sampling moments, the second sampling moments are a preset number of sampling moments before the first sampling moment and are the closest to the first sampling moment, and the first sampling moment is the sampling moment corresponding to the first sound data; carrying out the sliding smooth processing of the first sound data according to the second sound data; and determining the processed sampling data as the data after the denoising of the first sound data. According to the technical scheme of the embodiment, the method can remove the noise of an abrupt change type in a sound signal, and improves the sound quality.

The invention discloses a welding method of tube plate for tube plate heat exchanger and belongs to the technical field of automatic welding. The welding method is characterized in that the welding method comprises the following steps that 1, the welding point of the tube plate heat exchanger and the central position of tube plate welding point are identified; 2, the number of tube plates s and the number of welding layers n are calculated; 3, according to the number of tube plates s, the number of welding layers n and the central coordinate of the welding point of tube plates, a control device formulates the welding plan on the basis of the principle of from the outside to the inside and principle that the mechanical arm drives the welding gun to rotate 90 degrees after each welding; 4, the welding gun (7) can be moved to the welding spot; 5 the second CCD camera (10) identifies and processes the image information of the current welding point, and then obtains the coordinates and radius of a center of the corresponding single tube plate circle; 6, the welding gun (7) welds the tube plate according to the welding plan; and 7, the welding gun (7) welds the not welded tube plates. The welding method of tube plate for tube plate heat exchanger realizes automatic welding, reduces welding heat stress and ensures good sealing property of welding.

The invention discloses an unmanned aerial vehicle image acquisition method, which relates to the technical field of unmanned aerial vehicles and comprises the steps of judging whether information that an unmanned aerial vehicle flies to a first preset position is received or not; generating a signal for controlling an infrared thermal imager or the visible light camera to shoot a picture of a preset size according to the day and night conditions when the signal is received; acquiring image data of the photographed picture with the preset size and acquiring a target outline according to the image data; calculating according to the outline of the target to obtain a geometric center value of the target; judging whether the geometric center value of the target is equal to the geometric centervalue of a shot preset-size picture sent by an infrared thermal imager or a visible light camera or not; if yes, controlling a scanning servo device to move according to the track, and meanwhile controlling a hyperspectral camera or the infrared thermal imager to shoot images and collect image shooting data; and performing noise reduction processing according to the acquired image shooting data to obtain a target clear image. The method has the advantages of high image acquisition precision and definition.

The embodiment of the invention discloses a respiratory signal extraction method and device, a magnetic resonance imaging system and a storage medium. The method comprises the following steps of: acquiring a first set number of points of pure respiratory modulated pilot tone signals received by a plurality of channels; carrying out eigenvalue decomposition on the basis of a covariance matrix, anddetermining a respiratory feature direction; acquiring a second set number of points of interfered pilot tone signals which are received by a plurality of channels and generate signal mutation when asequence of pulses runs; carrying out eigenvalue decomposition on the basis of a covariance matrix to obtain an eigenvector matrix, and determining an interference feature direction; for each pilot tone signal received by the plurality of channels, respectively utilizing the feature vector matrix to carry out orthogonal transformation to obtain a plurality of signals; and performing projection addition on the signals in the other feature vector directions except the signals in the interference feature direction in the respiratory feature direction to obtain a respiratory navigation signal. Visibly, respiratory signals accurately representing respiratory movements can be reproduced.

The invention discloses an in-car communication audio switching device and method. The device comprises a signal processing unit, a filtering unit and a noise reduction switch. The signal processing unit comprises an FPGA, a DSP digital signal processor, an AD conversion module and a DA conversion module. A communication device is connected with the FPGA in the signal processing unit through a synchronous serial port, signals in the communication device are sent to the FPGA through the synchronous serial port, the FPGA is respectively connected with the DA conversion module and the AD conversion module through the DSP digital signal processor, the filtering unit comprises an audio circuit module, the DA conversion module and the AD conversion module of the signal processing unit are connected with the PHONE end and the MIC end of a pair of earphones respectively through the audio circuit module, and the noise reduction switch is connected with the DSP digital signal processor. The in-car communication audio switching method improves the restrain effect of voice frequencies, sent to the earphones by the communication device, to noise or interferences, and has the advantage of being capable of improving the audio quality.

The invention relates to a parameter correction method and system for a VR treadmill and a readable storage medium, and the method comprises the steps: transmitting user left leg and right leg motionstate data detected by a sensor to a data node for preprocessing to obtain the real-time leg motion information of a user; analyzing the user inclination information through the user arm action data,pre-judging the user state, obtaining a processing mode, and obtaining processing information; matching treadmill parameter information according to the processing information, and adjusting the treadmill parameter information in real time; obtaining a protection processing mode according to the user leg action information and the user inclination information, and obtaining protection processing information; adjusting the state of the protection air bag according to the protection processing information to obtain result information, and uploading the result information to a cloud server; performing iterative processing on the result information through a cloud server to obtain optimization information; and establishing a model for the optimization information, and analyzing to obtain parameter correction information.

The invention discloses an adaptive wavelet threshold MEMS gyroscope noise reduction method based on maneuvering identification. The method comprises the following steps of: S1, establishing a maneuvering action identification model according to a dynamic Bayesian network method, and determining a maneuvering action currently executed by an aircraft; S2, establishing a maneuvering overload analysis model according to an error analysis method, and determining maneuvering overload data required by an MEMS gyroscope; and S3, establishing an overload-threshold adaptive model under each maneuvering action, and determining an adaptive wavelet noise reduction curve of the aircraft under different maneuvering actions and different overloads. According to the method, maneuvering identification is taken as a characteristic, the adaptive wavelet threshold method is taken as a signal processing method, noise reduction processing of the MEMS gyroscope is realized, and it is verified that the noise reduction effect of the gyroscope is remarkably improved with the method applied.

The invention discloses a cable monitoring system based on the Internet of Things. An insulation signal detected by an insulation detection module receives a cable joint insulation signal detected bya sensor through a preprocessor by means of amplitude limiting and a first differential filter, the signals enter a second differential filter and are counteracted with noise signals to realize noisereduction processing, wherein the noise signals are detected and output by the noise sensor, obtained by amplification of an amplifying circuit and half-wave rectification, and then subjected to buffering to filter out an abnormal high value; whether the cable joint insulation signal is abnormal or not is judged, the cable joint insulation signal is released to the ground when being abnormal, andthe cable joint insulation signal is subjected to amplitude-limiting amplification and then output when being normal, that is, the cable joint insulation signal is transmitted to an intelligent controller after being subjected to anomaly processing. Whether the cable joint mechanical abnormal information detected by a cable joint gap detection module or the current-carrying capacity information, which is detected by a current-carrying capacity detection module, of the cable joint is abnormal or not is the basis for judging whether the cable joint insulation signal is abnormal or not, and the insulation detection precision is improved.

The invention provides a motor and a method for controlling the motor to perform noise reduction. The motor comprises a pedestal, a stator iron core and at least two connecting pieces; wherein each connecting piece is connected with the pedestal and the stator iron core respectively, and the stator iron core is fixed in the pedestal. The rigidity of each connecting piece is adjustable, and adjustment is realized through external force acting on any one of the connecting pieces. According to the scheme, the rigidity of the connecting pieces of a motor is adjusted through external force, noise reduction processing can be carried out on the motor, and the implementation mode is simpler.

The invention discloses an optical fiber damage monitoring system by analyzing various environmental vibration signals. A central processing system is included. An input end of the central processingsystem is electrically connected with an output end of an environment monitoring system through a wire. The environment monitoring system comprises a vibration signal monitoring unit and an optical signal monitoring unit, the optical signal monitoring unit comprises an optical signal acquisition module, and the output end of the optical signal acquisition module is electrically connected with theinput end of a photoelectric conversion module through the wire. The invention relates to the field of an optical fiber communication technology. By using the optical fiber damage monitoring system byanalyzing the various environmental vibration signals, vibration signals and optical signals in various area environments covered by an optical fiber network can be collected, analyzed and judged, then a specific position of a fault point is calculated, maintenance personnel are informed to carry out rush repair at the first time, and a problem that the network is thoroughly interrupted due to afact that fibers in an optical fiber are finally broken is solved.

The invention provides a virtual reality system of an information security environment, and further provides a decryption algorithm of the virtual reality system. Denoising processing on voice signalnoise is achieved in the encryption and decryption process, and the defect that a traditional encryption algorithm cannot ensure the information security and the defect existing when a chaotic systemconducts encryption are overcome to a certain extent.

The invention discloses a data identification method, device and equipment and a computer readable storage medium. The method comprises the steps of: obtaining to-be-identified spatio-temporal data, and converting the to-be-identified spatio-temporal data into a spatial covariance matrix; calling a manifold dimension reduction layer in a preset target identification model to perform dimension reduction processing on the spatial covariance matrix to obtain a dimension-reduced covariance matrix of a preset dimension; calling a tangent space projection layer in the target identification model toproject the dimension-reduced covariance matrix to a tangent space of the dimension-reduced covariance matrix to obtain a projection result; and inputting the projection result into a neural network layer in the target identification model to obtain a identification result of the to-be-recognized spatio-temporal data. A scheme for realizing a data identification task by adopting a deep learning technology is provided, so that the identification accuracy of the spatio-temporal data is improved.

The invention provides a multimedia data safety transmission method, and provides a decryption algorithm thereof at the same time; the noise reduction processing on the voice signal noise is realizedin the encryption / decryption process, and the defect that the traditional encryption algorithm cannot guarantee the information security and the defect existent in the encryption of a chaotic system are overcome to a certain extent.

The invention discloses a cable monitoring system based on the Internet of Things. An insulation signal detected by an insulation detection module receives a cable joint insulation signal detected bya sensor through a preprocessor by means of amplitude limiting and a first differential filter, the signals enter a second differential filter and are counteracted with noise signals to realize noisereduction processing, wherein the noise signals are detected and output by the noise sensor, obtained by amplification of an amplifying circuit and half-wave rectification, and then subjected to buffering to filter out an abnormal high value; whether the cable joint insulation signal is abnormal or not is judged, the cable joint insulation signal is released to the ground when being abnormal, andthe cable joint insulation signal is subjected to amplitude-limiting amplification and then output when being normal, that is, the cable joint insulation signal is transmitted to an intelligent controller after being subjected to anomaly processing. Whether the cable joint mechanical abnormal information detected by a cable joint gap detection module or the current-carrying capacity information, which is detected by a current-carrying capacity detection module, of the cable joint is abnormal or not is the basis for judging whether the cable joint insulation signal is abnormal or not, and the insulation detection precision is improved.

The present invention discloses a method and device for signal processing, belonging to the signal processing technology field. The method comprises: obtaining double dual-correlation function of signals, obtaining the auto-correlation function of the signals according to a correlation function; performing Fourier transform of the auto-correlation function, and obtaining double dual-correlation function of signals. The method and device for signal processing can realize the noise reduction processing of the signals including the noise.

The invention relates to the technical field of noise reduction equipment, in particular to novel industrial noise reduction equipment which comprises a noise reduction device box body, heat dissipation devices, mechanical equipment, a damping device and a rubber carrying table, the two sides of the noise reduction device box body are symmetrically provided with the two heat dissipation devices, the damping device is arranged in the noise reduction device box body, and the rubber carrying table is arranged at the lower end of the damping device; the two sets of exhaust fans are consistent in wind direction, the two sets of exhaust fans operate at the same time, so that air in the closed box body flows in an accelerated mode, mechanical equipment is effectively cooled, first sound absorption cotton absorbs noise in the vent pipe, the noise is prevented from flowing out when the heat dissipation device conducts ventilation on the closed box body, and due to the arrangement of the heat dissipation device, the mechanical equipment is cooled, and meanwhile noise pollution is effectively avoided.

The invention provides a conference system based on digital voice encryption and also provides a decryption algorithm of the system. In the encryption and decryption processes, noise reduction processing of voice signal noise is achieved, and the defect that information safety cannot be ensured by a traditional encryption algorithm and defects caused by encryption of a chaotic system are overcometo a certain extent.

The invention aims to solve a problem of noise during road repair and discloses a road repair noise reduction device for municipal road construction. The device comprises a support frame, wherein a connecting ring is fixedly connected to a top end of the inner side of the support frame, a top surface of the support frame is sleeved with a sliding plate, and a baffle is fixedly mounted at a lower end of the sliding plate; first spiral springs are symmetrically connected between the baffle and the supporting frame, sliding rods are sleeved with the first spiral springs, a first supporting plate is fixedly installed at a top end of the sliding plate, fixing rods are symmetrically installed on a left side face and a right side face of the supporting frame, and second supporting plates are fixedly installed at outer ends of the fixing rods; connecting plates are symmetrically installed in the first supporting plate and the second supporting plate, inserting rods are evenly and symmetrically installed between the connecting plates, surfaces of the inserting rods are sleeved with rotating cylinders, and a pull belt is connected between the rotating cylinders. Through a drawstring, the drawstring can be used for noise reduction, meanwhile, a refrigerator is used for cooling, and the comfort level of the working environment is improved.

The invention discloses a steam discharge water tank with a silencing function. The discharge water tank is provided with an upper water tank and a lower water tank which are stacked up and down, a silencer is arranged in the lower water tank and is connected with an external steam discharge pipeline. After steam enters the silencer, multi-stage baffling pressure reduction is realized through a plurality of silencing plates arranged inside the silencer, so that noise is effectively reduced. Meanwhile, the lower water tank is also provided with a first silencing plate and a second silencing plate, and steam jet pretreated by the silencer continues to be deflected through upper silencing structures of the first silencing plate and the second silencing plate, so that the noise is further reduced. Meanwhile, the first silencing plate and the second silencing plate can realize noise reduction by inserting the silencer. Through the design of the first silencing plate, the second silencing plate and the silencer inserted on the first silencing plate and the second silencing plate, parent silencing and child silencing are mutually matched, a unique nested circulating silencing structure isformed, noise reduction and emission of steam are further realized, and therefore a problem of emission noise pollution of the steam is effectively reduced.

The invention relates to a gear shifting inhaul cable noise reduction device which comprises a shell, a sealed part, a sliding part and a second connection part. A containing cavity is formed in the shell, and the end, in the axial direction, of the shell is fixedly connected with a first connection part. The sealed part is arranged in the containing cavity, and a sealed cavity filled with gas isformed in the sealed part. The sliding part is arranged in the sealed cavity so that the sealed cavity can be divided in the axial direction of the shell, and can slide in the axial direction of the shell, and through communicating holes are formed in the sliding part. The second connection part extends from the outer portion of the side, opposite to the first connection part, of the shell into the sealed cavity and is fixedly connected with the sliding part. By arranging the sealed part, when noise of a transmission is transferred through a gear shifting inhaul cable, the sliding part slidesin the sealed cavity due to the fact that the first connection part and the second connection part are connected with the inhaul cable, gas flows between the portions, on the two sides of the slidingpart, of the sealed cavity through the communicating holes, and then, noise reduction treatment on the noise is achieved.

The present invention provides a polygon mirror motor, an optical writing device, and an image forming device. The polygon mirror motor includes a rotor and a stator disposed around the rotor; the polygon mirror motor further includes a polygon mirror and at least a flow guiding portion; the polygon mirror is connected with the rotor and is of a polygonal prism structure; a reflecting surface forreflecting a light beam is formed at the side edge surface of the polygon mirror; when the polygon mirror rotates at a high speed, airflow near the side edges of the polygon mirror smoothly flows through the flow guiding portion, and therefore, air resistance can be reduced; with the flow guiding portion adopted, each side edge of the polygon mirror can be of a continuous flat or curved structure,and therefore, a condition that obvious gaps exist between the airflow when the airflow passes through the side edges can be avoided, difference between the pressure of a windward surface and the pressure of a leeward surface can be decreased, turbulence or vortex formed due to atmospheric pressure difference at the leeward surface can be prevented, and therefore, the noise reduction processing of the polygon motor can be realized.

The invention discloses a heat dissipation and cooling low-noise structure of an engine, relates to the related field of heat dissipation of engines, and aims to solve the problem that in the prior art, an existing heat dissipation and cooling structure is prone to generating noise during use. Clamping and pressing plates are arranged on the two sides of the engine body correspondingly, cooling fans are arranged on the clamping and pressing plates, a supporting block is arranged at the lower end of the device shell, a sound wave output module is arranged on one side of the device shell, a sound wave recognition module is arranged in the supporting block, and a control module is arranged at the lower end of the sound wave recognition module. A control module is arranged at the upper end of the device shell, a data storage module is arranged on one side of the control module, a data transmission module is arranged at the upper end of the data storage module, a liquid inlet pipe is arranged at the upper end of the device shell, the liquid inlet pipe is in a circular pipe shape, an electric valve is arranged on the liquid inlet pipe, and the liquid inlet pipe is connected with the device shell through manual electric arc welding.

The invention relates to a gear shifting inhaul cable noise reduction device which comprises a shell, a sealed part, a sliding part and a second connection part. A containing cavity is formed in the shell, and the end, in the axial direction, of the shell is fixedly connected with a first connection part. The sealed part is arranged in the containing cavity, and a sealed cavity filled with gas isformed in the sealed part. The sliding part is arranged in the sealed cavity so that the sealed cavity can be divided in the axial direction of the shell, and can slide in the axial direction of the shell, and through communicating holes are formed in the sliding part. The second connection part extends from the outer portion of the side, opposite to the first connection part, of the shell into the sealed cavity and is fixedly connected with the sliding part. By arranging the sealed part, when noise of a transmission is transferred through a gear shifting inhaul cable, the sliding part slidesin the sealed cavity due to the fact that the first connection part and the second connection part are connected with the inhaul cable, gas flows between the portions, on the two sides of the slidingpart, of the sealed cavity through the communicating holes, and then, noise reduction treatment on the noise is achieved.