59results about How to "Improve signal processing capabilities" patented technology

The invention discloses a double-linear polarization Doppler weather radar system which comprises an outdoor part and an indoor part. The outdoor part comprises an antenna servo subsystem, a transmitting subsystem, a receiving subsystem, a monitoring calibration subsystem and a power distribution subsystem. The indoor part comprises a signal processing terminal and a user subsystem. According to the double-linear polarization Doppler weather radar system, the ingenious signal link design is adopted, the equipment quantity is reduced, and the reliability of the system is improved; a multi-channel signal processing mode is used, simultaneous measurement of all parameters of a double-linear Doppler weather radar is achieved, and the timeliness of detection data is improved; a signal processing technology based on a GPU is utilized, and the processing capacity of double-linear signals is enhanced; a unique two-channel full-path transmitting-receiving calibration technology is used, two-channel transmitting-receiving system errors of the radar system are reduced, and an effective guarantee is provided for improving the quality of the detection data.

The invention discloses an adaptive hysteresis sliding-mode control method for a double-tube Buck-Boost converter. Aiming at the characteristic that the double-tube Buck-Boost converter has a right-half-plane zero point, a hysteresis current controller is adopted and the controlled quantity switching frequency is not over-high due to addition of hysteresis; aiming at the characteristic that the converter is relatively wide in input range, an adaptive feedforward is introduced, the hysteresis width is changed according to a change of input voltage and the switching frequency changes within a relatively small range when the input voltage changes; and aiming at the characteristic that the steady state switching frequency is affected by a load change, an adaptive feedback is introduced, a sliding coefficient is adjusted according to the load change and the switching frequency remains unchanged in the load change. Design and implementation of the controller are relatively simple; the response speed is relatively high; and the controller has relatively high stability and robustness, and can be applied to the occasions of a wide-range change of input voltage and a relatively large load change.

The invention discloses a resolution-adjustable wavelength selection switch based on a phase grating array and a control method. The resolution-adjustable wavelength selection switch comprises a one-dimensional single mode fiber array, a microlens array, a polarization adjusting prism, a double-glued optical Fourier transformation lens, a transmissive phase diffraction grating array, a cylindrical mirror, a liquid crystal spatial light modulator and a graph loading control system. The transmissive phase diffraction grating array is adopted, difference in chromatic dispersivity of transmissive phase diffraction gratings different in period is utilized, and wavelength range of parallel beams finally imaged on the liquid crystal spatial light modulator and wavelength control accuracy determined by a single pixel unit can be changed by switching the transmissive phase diffraction gratings having different periods, so that switching and adjusting of working wavelength range and wavelength resolution of the wavelength selection switch are realized, and the wavelength selection switch can be used for processing large-bandwidth high-speed signals in backbone networks.

A branching device (connection equipment) 2 for connection to electronic equipment 1 divides signal lines used for USB 3.0 (first interface) into signal lines used for USB 2.0 (second interface) and signal lines not used for USB 2.0. The branching device 2 can be connected to a connection device 4 performing communication in accordance with USB 2.0 and to a connection device 3 performing communication using the signal lines not used for USB 2.0. The electronic equipment 1 inputs/outputs data, through the branching unit 2, to/from the connection device 4 in accordance with USB 2.0 and to/from the connection device 3 by communication using the signal lines not used for USB 2.0. The two types of data input/output can be executed in parallel.

Blocks of audio information are arranged in groups that share encoding control parameters to reduce the amount of side information needed to convey the control parameters in an encoded signal. The configuration of groups that reduces the distortion of the encoded audio information may be determined by any of several techniques that search for an optimal or near optimal solution. The techniques include an exhaustive search, a fast optimal search and a greed merge, which allow the search technique to tradeoff the reduction in distortion against the bit rate of the encoded signal and/or the computational complexity of the search technique.

The invention provides a CMOS GOA circuit, by disposing a feedback regulation module (4) connected to output buffer module (3) and signal processing module (2) in the GOA unit, to achieve the following: when the scan driver signal (G(N)) becomes high, the positive feedback from the sixth N-type TFT (T6) of feedback regulation module (4) will enhance the pull-down capability of the signal processing module (2) to reduce the rising time of the scan driver signal (G(N)) waveform; when the scan driver signal (G(N)) becomes low, the positive feedback from the fifth P-type TFT (T5) of feedback regulation module (4) will enhance the pull-up capability of the signal processing module (2) to reduce the falling time of scan driver signal (G(N)) waveform; that is, the invention can reduce the RC loading of scan driver signal (G(N)) and improve the stability of high resolution display panel.

The invention discloses a mechanical vibration state identification method based on statistics in different orders and a support vector machine. The mechanical vibration state identification method includes the following steps of (1) using a vibration measurement device to collect vibration data of a mechanical system and subjecting the vibration data to segmentation and de-meaning pretreatment; (2) calculating third-order statistics and fourth-order statistics of each segment of the vibration data after pretreatment, and using the third-order statistics and the fourth-order statistics as two feature vectors; estimating fraction low-order statistics of each segment of the data after treatment, i.e., a feature index alpha and a dispersion coefficient gamma as another two feature vectors; (3) classifying and judging vibration states of the mechanical system by means of the support vector machine on the basis of the four feature vectors. The mechanical vibration state identification method based on statistics in different orders and the support vector machine has the advantages that under the concept of non-Gaussian signal processing, two kinds of statistical methods of high-order statistics and fracture low-order statistics in a feature extracting method are combined, vibration signal features can be more comprehensively extracted, and the problem of performance degradation of a system under a non-Gaussian condition in traditional second-order statistics based methods is solved.

The invention discloses a new and multi-functional overspeed protection form of the steam turbine which can measure the slow rotational speed precisely. It contains the signal processing system and the power subsystem. It is characterized in that: the signal processing system contains the conditioning modules of rate signal and current signal, ADC, DAC, MCU, CPLD, relay controlling and nixie displaying. The signal collecting and processing system of the magnetic resistant and electric eddy current speed sensors is set in the rate signal conditioning module and connected with the ADC module. The DAC module and the relay controlling module link the CPLD module. The CPLD module links the MCU module through the SPI full-duplex synchronous communication interface. The invention adopts the building block design to improve the form integrated level and anti-interference, which can improve the form performance indexes as avoiding the steam turbine happening the overspeed accidents, enhance the function, improve the integrated level and reduce the working cost.

The invention discloses a multi-material mixing system and a method thereof, and belongs to the technical field of material loading and unloading. The system comprises monitoring equipment, exchange equipment, material mixing programmable controller, a weighing programmable controller, loading and unloading equipment, a material distributing cabin, feeding equipment, weighing equipment and a total material cabin, wherein the monitoring equipment is connected with the exchange equipment; the exchange equipment is respectively connected with the material mixing programmable controller and the weighing programmable controller; the material mixing programmable controller is respectively connected with the loading and unloading equipment, the feeding equipment and the material distributing cabin; the weighing programmable controller is connected with the weighing equipment; the loading and unloading equipment is used for unloading the material to the material distributing cabin according to weighing result of the weighing equipment; the feeding equipment is used for mixing the material to the total material cabin through a material mixing conveyer belt according to the weighing result of the weighing equipment. According to the invention, closed loop control of a feeding machine is achieved through the material mixing programmable controller and the weighing programmable controller, and the purposes that the scanning period is shortened, the signal processing capability is improved, and the material mixing quality is improved, are achieved.

The signal processor includes an analog filter, an analog-to-digital (A-D) converter, an adaptive equalization filter, a quality value calculating circuit, and a control circuit. The analog filter removes high-frequency noises of a played-back signal from a recording medium and amplifies a specific frequency band of the played-back signal. The A-D converter converts the played-back signal from the analog filter into a digital signal. The adaptive equalization filter performs waveform equalization of the played-back signal from the A-D converter while adjusting a tap coefficient of the adaptive equalization filter so as to reduce a difference between an output of the adaptive equalization filter and a target value. The quality value calculating circuit calculates a quality value based on the difference between the output of the adaptive equalization filter and the target value. The control circuit compares the quality value calculated by the quality value calculating circuit with a predetermined reference value, and conducts a process for improving the quality value according to the comparison result.

The invention discloses an elevator cage control panel, which comprises a request signal acquisition terminal and a programmable system chip, wherein the programmable system chip comprises a programmable microprocessor, a storing device, programmable digital arrays and programmable analog arrays; an elevator signal processing program and an elevator signal command are written in the storing device; the configurations of a digital module of each programmable digital array and an analog module of each programmable analog array can be changed in real time according to the definition of the elevator signal processing program, and the digital modules of the programmable digital arrays and the analog modules of the programmable analog arrays perform corresponding functions together according tothe definition of the program; functional configurations are performed on the digital modules and the analog modules in advance, and the elevator signal processing program is controlled in real time to perform dynamic reconstruction; and the elevator signal command translates the content of the received elevator signals. The elevator hall call control panel can be produced in large scales, and isconvenient to mount and manage.

The invention provides an antenna signal processing device with a plurality of processing units, which is used for simultaneously or together processing electromagnetic signals from one or a pluralityof antenna plates in a cooperative mode. The main structure of the antenna signal processing device comprises a plurality of sub-processing units and an integrated processing unit, wherein each sub-processing unit is respectively connected to a same antenna plate or different antenna plates, and the integrated processing unit is respectively connected with each sub-processing unit. If each sub-processing unit is respectively connected to different antenna plates, the sub-processing units can independently process signals simultaneously, and in contrast, if connected to the same antenna plate,the sub-processing units can together process signals cooperatively. The sub-processing units can transmit signal processing results to the integrated processing unit, and the integrated processing unit integrates the signal processing results into various outputs for different applications.

The invention discloses a bijection type ultrasonic thickness detection module for bank note thickness detection. The bijection type ultrasonic thickness detection module comprises ultrasonic transmitters and ultrasonic receivers, which are arranged at intervals in pairs, and a controller, an ultrasonic transmission driving circuit, a signal amplifying and maintaining circuit, a signal collecting circuit and a signal discharging circuit. The bijection type ultrasonic thickness detection module disclosed by the invention detects the bank note thickness through ultrasonic, thereby simplifying the installation manner, improving the adaptability of the installation position and getting rid of the constraint of a following roller on the installation position, meanwhile, the signal amplifying and maintaining circuit is used for improving the signal processing effect, and meanwhile shortening the actual working times of the ultrasonic transmitters and the ultrasonic receivers, effectively prolonging the service lives of the ultrasonic transmitters and the ultrasonic receivers and stably collecting signals at multiple points to guarantee the processing accuracy. Signals detected by each path of independent thickness sensors are spliced to the thickness feature of an entire bank note to effectively improve the accuracy of judging whether the bank note is an overlapped bank note.

The present invention provides a Synchronous Digital Hierarchy (SDH) tributary module supporting multiple service processing, which includes an SDH tributary processing unit and at least two service processing units, the SDH tributary processing unit which is connected with each of the service processing units respectively multiplexing and demultiplexing different service signals in an SDH signal, and each of the service processing units which is directly connected with a corresponding local interface respectively mapping and unmapping corresponding service signals. The tributary module further includes a multiple service cross processing unit which is connected with each of the service processing units to implement interconnection among different services. The present invention can reduce the number of board and avoid using external network line or equipment, so as to reduce the cost of equipment, facilitate the maintenance of equipment and improve the reliability of equipment.

A method, an apparatus and a device for processing sound signals are provided in the present application. The method comprises: receiving a first sound signal through a first sound reception apparatus and a second sound signal through a second sound reception apparatus respectively; the first sound reception apparatus and the second sound reception apparatus have a corresponding reception delay constant therebetween; performing delay processing on the first sound signal according to the reception delay constant at each signal processing time to acquire a signal correlation coefficient between the first sound signal after the delay processing and the second sound signal; detecting whether the first sound signal and the second sound signal include a coherent noise signal according to the signal correlation coefficient between the first sound signal after the delay processing and the second sound signal; filtering out the coherent noise signal from the first sound signal and the second sound signal when the coherent noise signal is included in the first sound signal and the second sound signal to acquire and output a target sound signal at a corresponding signal processing time.

The invention provides a ceiling-mounted antenna which comprises a PCB, a first radiation portion, a first signal transmission line, a first reflection portion and a second reflection portion. One end of the second reflection portion is fixedly connected with the first radiation portion, the other end of the second reflection portion is fixedly connected with the first reflection portion, the first reflection portion is fixedly installed on the PCB, and the first radiation portion is connected to the PCB through the first signal transmission line. According to the ceiling-mounted antenna, due to the structural design of the first radiation portion, the integral size is reduced, signal processing capacity of the ceiling-mounted antenna is improved, the signal use ratio of a signal source is improved through application of the reflection portions, and the ceiling-mounted antenna is simple in structure and convenient to install, and cannot influence indoor decoration.