39results about How to "Strong signal processing ability" patented technology

The invention discloses an intelligent street lamp energy-saving control system based on an artificial neutral network. The intelligent street lamp energy-saving control system comprises a sensor system, an energy-saving control system and a power controller. An output signal of the sensor system is connected with an input terminal of the energy-saving control system; and an output signal of the energy-saving control system is connected with the power controller. Besides, the intelligent street lamp energy-saving control system is characterized in that: the sensor system includes environmental optical signal collection processing module, an infrared signal collection processing module and a sound signal collection processing module; the energy-saving control system consists of a DSP embedded system and an artificial neutral network module that is arranged in a DSP chip; and the artificial neutral network module is formed by a forward algorithm of an artificial neutral network BP algorithm and an artificial neuron that has been trained. According to the invention, according to peripheral environment situations of all street lamp illumination units, intelligent power control can be realized; and on the premise that an illumination requirement is met, energy consumption is effectively reduced.

The invention discloses a commodity anti-counterfeiting traceability system and method based on active radio frequency identification (RFID) technology. The system comprises an active RFID tag fixed in a commodity, a miniature active RFID reader-writer which is similar to a U disk (universal serial bus (USB) flash disk) and is connected with a mobile phone or a computer through a USB interface, a tag-reader-writer communication protocol module, a commodity information cloud data management center and a data management terminal of a commodity manufacturer. The anti-counterfeiting traceability system and method have the advantages of low cost, high safety and high reliability; and by adopting the system and method, commodity information can be inquired anytime and anywhere.

The invention relates to a digital signal processor (DSP)-based rotating machine vibration detection and protection system. The system mainly comprises a power module, a sensor power supply module, a sensor signal acquiring and conditioning module and a microprocessor microprogrammed control unit (MCU) module, wherein a DSP module is arranged between the sensor signal acquiring and conditioning module and the microprocessor MCU module and is used for processing a sampled signal; the microprocessor MCU module is used for determining a corresponding numerical value signal processing algorithm of the DSP module according to conditions of different sensors, control modes and the like; and the DSP module is used for transmitting processed data to the microprocessor MCU module through a host port interface (HPI). In the system, a DSP is used as a vibration signal operation central processing unit (CPU), so that vibration signals can be acquired at a high speed; and the DSP has high signal processing capability, so that calculation accuracy is improved, a state monitoring and protecting function can be quickly finished, and the operation load of an upper computer is reduced.

The invention discloses a DDS-based Doppler compensation device in real-time water sound communication. An analogue-to-digital conversion circuit at the front end of a communication processing plate is connected with a universal I/O port of a field programmable logic device FPGA in a parallel interface mode through a group of data buses; a signal processing chip DSP serving as a processing core chip is connected with the FPGA through the data buses of EMIFA interfaces in and out of the chip; a chip selection wire, a reading control wire and partial address wires of an EMIFA interface are connected with the universal I/O interface of the FPGA; 10/100Mb/s Ethernet comprising a DSP for interconnecting networks controls an external network interface circuit; and a frequency synthesis module is connected with the universal I/O interface of the FPGA through a group of data buses and reading control wires of the DDS. The device can well compensate the Doppler frequency shift in the real-timewater sound communication in real time with high precision, and has the characteristics of high output frequency precision, real-time Doppler communication, strong applicability, high speed, stability and flexible application.

The invention discloses an FPGA-based phase generation carrier demodulation system, and relates to the technical field of optical fiber phase demodulation. The PGC demodulation system uses an FPGA asa signal processor, and can improve the operation rate and demodulation speed of the system. The PGC demodulation system comprises a PGC demodulation module, a data caching module and an asynchronouscommunication module which are connected in sequence. The input to-be-demodulated data is directly input into the data cache module for storage. The PGC demodulation module adopts an improved PGC demodulation algorithm to demodulate the data to be demodulated. A disturbance removing unit is introduced into the PGC demodulation module. The division operation is carried out in the disturbance removal unit to eliminate signals containing alternating current items and modulation depths. Therefore, the output item only has the tangent value of the phase signal. The dependence of the demodulation result on the modulation depth introduced by an external carrier is reduced. The uncertainty of the demodulation result caused by unstable factors such as a light source can also be avoided. The accuracy and the stability of system demodulation are improved.

The invention puts forwards a device for realizing intra-pulse modulation characteristic analysis on the basis of a multi-core DSP (Digital Signal Processor). An intra-pulse modulation characteristic analysis hardware platform is formed on the basis of FPGA (Field Programmable Gate Array) and the multi-core DSP, the FPGA receives baseband IQ (Intelligence Quotient) data output from a front-end digital channelization receiver through a serial rapid GTX interface, then, the data is transmitted into a DSP memory through a SRIO (Serial Rapid I/O) interface, and same frame of received pulse data in a plurality of DSP cores is subjected to modulation characteristic analysis in parallel. The invention realizes a device capable of improving the speed and the precision of the intra-pulse modulation characteristic analysis of a pulse signal on the basis of the multi-core DSP, and the device adopts a multi-DSP-core parallel operation and an efficient batch processing algorithm and has the characteristics of high data throughput and high algorithm realization efficiency.

A method for selecting safe transmission of one-way full-duplex MIMO relay antenna is disclosed. The full-dual MIMO relay system comprises a source, a relay, a destination node and an eavesdropper. The source, the relay, the destination node and the eavesdropper are configured with multiple antennas. The transmission of information is completed in one time slot, comprising the following steps: acquiring the number of transmitting antennas of the source and the number of receiving antennas of the relay; obtaining the number of transmit antennas for the relay; based on the number of transmittingantennas of the source, the number of receiving antennas of the relay and the number of transmitting antennas of the relay, obtaining the reception signal-to-noise ratio of the destination and the reception signal-to-interference-noise ratio of the eavesdropper; obtaining the instantaneous safety capacity of the full-duplex MIMO relay system based on the received signal-to-noise ratio of the destination and the received signal-to-interference-noise ratio of the eavesdropper. By selecting the optimal transmitting and receiving antennas, the method of the invention not only optimizes the signal-to-noise ratio of the relay reception, but also takes into account the weakening of the signal-to-interference-to-noise ratio of the eavesdropper reception, thereby effectively improving the safety capacity of the whole system.

The invention discloses an anti-counterfeiting and source-tracing electronic label for commodities based on a radio-frequency active RFID (Radio Frequency Identification) technology. The electronic label comprises a PCB (Printed Circuit Board), an active RFID label communication chip and an antenna, an MCU (Micro Control Unit), an identifier displayer and a communication interface. The MCU is used for storing a label identifier representing a commodity identity, transmitting the label identifier to a reader, reading a reader identifier which proves the reader identity, decrypting the reader identifier, identifying whether the reader is true and controlling the identification result to be displayed on the identifier displayer.

The invention relates to a radio-frequency integrated-circuit triangular mesh generation method which is realized by cutting a metal layer into rectangles and polygons, respectively carrying out triangular mesh generation processing for rectangles and polygons generated by cutting based on preset maximum width of triangular mesh edges, and finally generating triangle point indexes and edge indexes and classifying respectively triangles with a same current at each layer. According to the invention, the designed radio-frequency integrated-circuit triangular mesh generation method can not only assist in improving quality and efficiency of triangular mesh generation, but also can assist in increasing electromagnetic field simulation speed.

The invention belongs to the technical field of underground cable detection, and discloses an integrated comprehensive underground cable maintenance detection method, a detection system and a detection instrument. The received induction electromagnetic field signal of the cable and the magnetic field signal, the sound signal and the leakage current signal generated by the impact discharge of the cable fault point are processed, and integrated cable path detection and cable fault point detection are carried out on the processed magnetic field signal, the sound signal and the leakage current signal. Compared with a traditional path instrument and a locating instrument with a single function, the detection instrument can be applied to more application scenes; different working modes can be switched through simple operation, so that corresponding methods can be quickly switched for detection according to different detection requirements; analog signal conditioning and digital signal processing are adopted, so that the instrument has relatively strong anti-interference capability and signal processing capability; and according to the invention, the problem that a cable fault point cannot be effectively detected because an impact discharge sound signal is interfered by background noise when an acoustic-magnetic synchronization method is adopted can be solved.

The invention relates to a static dynamic potential intelligent test device with a real-time testing technique. The device comprises a data acquisition module and a personal computer (PC) machine, wherein the data acquisition module comprises an input unit, a multi-way switch, an analog/digital (A/D) converter, a complex programmable logic device (CPLD), an opto-coupler isolation module and a universal serial bus (USB) bridge; the USB bridge transmits a data acquisition command signal of the PC machine to the CPLD; the CPLD transmits the signal to the input unit, the multi-way switch and the A/D converter through the input action of the opto-coupler isolation module; the input unit transmits an acquired static potential signal to the A/D converter through the multi-way switch; and the A/Dconverter transmits a digital signal back to the CPLD through the isolation amplifying action of the opto-coupler isolation module. The static dynamic potential intelligent test device can perform real-time analog monitoring on the dynamic operation process of the whole process in the fields of hazardous article storehouse, gas station, oil tanker, railway, highway transportation and the like, and continuously record and display the size, polarity and dynamic waveform of the static dynamic potential generated in the dynamic operation process of the whole process in real time.

The present invention provides a multimedia digital learning machine, including machine shell, multimedia signal processing circuit board, LCD screen, key panel group ,LED, loudspeaker and battery box. The LCD screen is placed on the front face of machine shell, and the key panel group is positioned on the front face of machine shell and its lower portion, the LED is positioned in the central position of front face of machine shell, and the multimedia signal processing circuit board, loudspeaker and battery box are mounted in the interior of machine shell. Its volume is small, and its multimedia function is rich and its power consumption is low.

The present invention relates to an embedded-type fixed-and-floating-point multi-beam depth-sounding sonar signal acquisition and processing platform. The platform is composed of a logic control system, an embedded algorithm processing system A, an embedded algorithm processing system B, an impedance matching circuit, a signal conditioning and acquisition circuit, a CPCI data transmission circuit, a control parameter transmission circuit, a system simulation power and a system digital power. With adoption of the platform provided by the present invention, space in a machine case is saved, noise interferences caused by inter-board signal transmission are also restrained, and great conveniences are brought for updating and optimization of a multi-wave system.

The invention belongs to the technical field of radar signal processing, and discloses an individual soldier radar high-integration signal processing system and a signal processing method. The systemcomprises a DSP, an ADC, a DAC and an Internet access module which are connected with an FPGA, and an upper computer display control terminal module which communicates with the Internet access moduleis included. An antenna module is connected with the FPGA, a signal output end of a clock generation module in the antenna module is connected with a clock chip, and the clock chip is connected with the ADC and the DAC. I/Q signals of radar echoes in the antenna module are connected with the signal input end of the ADC. According to the system, an FPGA + DSP architecture is adopted, the FPGA completes radar echo acquisition and signal preprocessing functions, the DSP performs real-time processing on radar echo data and generates plots according to the acquired data, moving target detection andtrack association are realized, a radar echo signal processing capacity is higher, a storage capacity is higher, and an integration level is high.

The invention discloses a bidirectional and duplex MIMO (Multiple Input Multiple Output) relay antenna selection and safety transmission method. A duplex MIMO relay system comprises a user A, a user B, a relay and an eavesdropper, wherein the user A, the user B, the relay R and the eavesdropper E are provided with a plurality of antennas; the method comprises the following steps: acquiring a transmitting antenna of the user A, a transmitting antenna of the user B and a receiving antenna of the relay; acquiring a receiving antenna of the user A, a receiving antenna of the user B and a transmitting antenna of the relay; acquiring a receiving signal-to-noise ratio of the user A, a receiving signal-to-noise ratio of the user B and a receiving signal-to-noise ratio of the eavesdropper E based on the transmitting antenna and the receiving antenna of the user A, the transmitting antenna and the receiving antenna of the user B and the receiving antenna and the transmitting antenna of the relay; acquiring an instantaneous safety capacity of the duplex MIMO relay system based on the receiving signal-to-noise ratio of the user A, the receiving signal-to-noise ratio of the user B and the receiving signal-to-noise ratio of the eavesdropper E. According to the bidirectional and duplex MIMO relay antenna selection and safety transmission method, optimal transmitting and receiving antennas areselected and the safety capacity of the whole system can be effectively improved.

The invention discloses a data interface board of a reconfigurable radar signal processing hardware platform, and belongs to the field of communications, the technical problem to be solved by the invention is how to meet the requirements of universalization, modularization and software of a radar signal processing system. The adopted technical scheme is as follows: the data interface board comprises an FPGA logic chip, an optical module, a gigabit PHY chip and a connector, PCB wiring between the FPGA logic chip and the optical module and between the FPGA logic chip and the connector meets therequirement that the maximum rate of each high-speed Lane reaches 10 Gbps, meanwhile, it is ensured that all differential pairs are equal in length and short in distance, and the signal transmission requirement is met; meanwhile, the FPGA logic chip supports storage of two groups of DDR4 memories, and the data transmission rate is 2400 Mb/s; the connector is connected with the gigabit PHY chip; wherein the FPGA logic chip is used for carrying out protocol conversion on data to enable the radar signal processing system to carry out data interaction with the outside so as to realize reconstruction of a data transmission mode of each port by the radar signal processing system; and the optical module is used for data interaction with the signal processing platform.

The invention provides an intelligent blackboard single-drive board card, and belongs to the technical field of board cards. The intelligent blackboard single-drive board card comprises a circuit board, a signal processing chip, an audio/video port arranged on the circuit board and connected with the signal processing chip, an analog signal output port arranged on the circuit board and connected with the signal processing chip, a digital signal output port arranged on the circuit board and connected with the signal processing chip, a VBY1 port arranged on the circuit board and connected with the signal processing chip, a power amplifier output port arranged on the circuit board and connected with the signal processing chip, and a power input port. The intelligent blackboard single-drive board card has the advantages that the board card is singly driven, the signal processing capability is high, and the working performance is good.

The invention discloses an implementation method of a high-power low-distortion D-type power amplifier based on a high-performance MCU, and belongs to the field of audio power amplifiers. The method comprises the following steps: 1) selecting and displaying an input signal mode; 2) preprocessing an input signal to obtain audio data; 3) transmitting the audio data to an STM32F407 minimum system, and outputting PWM to a half-bridge driving module; 4) enabling every two half-bridge driving modules to drive one full-bridge power amplification part to realize power amplification of small signals; 5) filtering the output of the full-bridge power amplification part; 6) carrying out current sampling on the output passing through the low-pass filter, and feeding back to the minimum system; 7) setting a digital filter according to the output feedback signal, and filtering the audio data in the step 1); and 8) repeating the steps 2)-7) to realize negative feedback control of the output. The problem of noise interference at the power-on moment of the D-type power amplifier is solved with low cost, high frequency can be compensated through IIR, and the problem that the D-type power amplifier has high requirements for a filter when the switching frequency is low is solved.