82 results about "Dsp technology" patented technology

The invention discloses an integrated navigation device for an underwater glider and a navigation method therefor. The integrated navigation device for an underwater glider is characterized in that the integrated navigation device comprises an electronic compass, a micro-electro-mechanical system (MEMS) inertia measurement unit, a global satellite system receiving module and a digital signal processing module; an inertial integrated navigation and positioning system comprising the electronic compass and a posture measuring unit comprising a MEMS gyro and an accelerometer cooperates with a control system; a digital signal processor (DSP) module is utilized as a navigation resolving part; and independent and accurate positioning of an underwater glider is realized through processes of noise reduction, temperature compensation, non-linear correction, cross-coupling compensation and dead reckoning on various sensors in a full temperature range. The integrated navigation device for an underwater glider has a small volume, a high integration level, low power dissipation, long endurance and a low cost, can fast and accurately acquire current posture and position information of an underwater glider, can keep the balance of the underwater glider, and can provide track and position parameters for the underwater glider.

Speech or musical performance is electronically analyzed using DSP techniques and is compared to a stored text script or musical score, to enable display of and automated sequencing through multiple pages of the stored script or score. The performer can modify timing of sequencing if desired, for example dependent on performance speed or musical complexity. Automated highlighting or marking of measures or text assists the performer in keeping track of progress through the performance. During or after the performance, electronic comparison of the performance to the score or script provides feedback to the performer, highlighting differences between the actual performance and the desired performance as described by the score or script. Additional capabilities enhancing the learning process include digital recording and playback of the actual performance, and/or accompaniment by synthesis or playback of digital recording of other performance parts (for example, other instruments in an ensemble or other actors in a play).

The invention relates to a technique for dynamically loading processor application programs and a hardware system for realizing the technique. The system mainly comprises a digital signal processor (DSP) 11, a field programmable gate array (FPGA) processor 17, a complex programmable logic device (CPLD) 16, a FLASH memory 13, a synchronous dynamic random access memory (SDRAM) 12, an interface chip14 and a power module 15, wherein fixed programs in the FLASH memory 13 comprise a DSP bootstrap program, a DSP management program and a plurality of FPGA and DSP application programs. A method for implementing the system has the characteristics that: dynamic loading and on-line updating of the FPGA application program and the DSP application program are realized by using the management program; the jump among the bootstrap program, the management program and the application programs is realized by the DSP technique so as to complete the dynamic loading function; and the FPGA is taken over bythe CPLD so as to configure a bus and the FPGA application program is loaded by combining the DSP.

The invention relates to an adaptive rejection system for carrier wave leakage in direct frequency conversion modulation in the DSP technology field. The system comprises a down-conversion module, a demodulation and frequency phase recovering module, a DC detection module and a feedback module. The adaptive rejection system can automatically monitor, track and compensate for the DC component caused by the changes in environmental temperature and humidity in all elements in a whole up-conversion link without interrupting a master signal, and the adaptive feedback structure has high precision at the same time.

The invention discloses an orchard bactrocera dorsalis insect damage recognition system based on digital signal processing (DSP) and the internet of things. The orchard bactrocera dorsalis insect damage recognition system comprises an installation support, a novel insect trap fixed on the installation support, an industrial camera arranged above the novel insect trap and a casing fixed on the installation support. A photoelectric detection module is arranged in the novel insect trap; a DSP digital image processing module, a scanning tunneling microscope (STM) 32 functional circuit, a global system for mobile communications (GSM)/general packet radio service (GPRS) wireless communication module and a charging control module which are sequentially connected are arranged in the casing; a displayer and a touch screen are arranged on the surface of the casing; and the charging control module is further connected with a solar panel. According to the orchard bactrocera dorsalis insect damage recognition system, the DSP technology, the machine vision technology and the internet of things technology are combined, the machine vision technology is achieved on a DSP processor platform and applied to detection and recognition of orchard bactrocera dorsalis, and accordingly fast and accurate detection and recognition of orchard bactrocera dorsalis are achieved. Simultaneously, automatic real-time monitoring of orchard insect damage is achieved and cost of manpower and material resources in orchard insect damage monitoring is reduced.

A satellite television ground system, particularly for a make or break satellite television signal system, includes an outdoor unit and an indoor unit that are in communication with each other via a single coaxial cable and an optional separate single conductor for power. The satellite television ground system is operative to measure and reverse frequency conversion errors utilizing DSP techniques, allowing for more precise generation and transmission of uplink signals from the satellite television ground system. Control data for the system is sent via a low data rate connection on a power cable thereof, or by a narrowband signaling channel via a coax cable. The system also utilizes a single reference oscillator to drive the various frequency synthesizers and the like. The satellite television ground system utilizes related oscillators for the uplink and downlink sections.

This invention relates to a technique based on DSP technology of digital low-power, high-precision and high voltage generator, including a high voltage generate circuit 1, steady voltage driving circuit regulators 2, DSP control system 3, current / voltage circuit sampling tube 4, and driven circuit 5. The high voltage circuit provides negative voltage for X-ray tubes, and produces current in the X-ray tubes. Current / voltage sampling circuit 4 samples the voltage / current which is provided to X-ray tube by high voltage circuit 1, and the sampling signal will be transmitted to the DSP control system 3. DSP control system samples the signals using the built-in 10 D synchronous analog-to-digital converter, analysis and processing. Converter Implementation of a high voltage output circuits have a negative high voltage X-ray tube and the current stability testing. Then PWM control signal wave will be output based on the test results, and put it on regulators driving circuit 2 and flow-driven circuit 5, and a closed-loop control circuit will be got, achieving the stability control of X-ray tube voltage and current.

A satellite television ground system, particularly for a make or break satellite television signal system, includes an outdoor unit and an indoor unit that are in communication with each other via a single coaxial cable and an optional separate single conductor for power. The satellite television ground system is operative to measure and reverse frequency conversion errors utilizing DSP techniques, allowing for more precise generation and transmission of uplink signals from the satellite television ground system. Control data for the system is sent via a low data rate connection on a power cable thereof, or by a narrowband signaling channel via a coax cable. The system also utilizes a single reference oscillator to drive the various frequency synthesizers and the like. The satellite television ground system utilizes related oscillators for the uplink and downlink sections. Carrier frequency offset in the downlink is measured in a carrier tracking loop part of a television signal demodulator. The carrier frequency offset of the downlink is utilized to synthesize various frequency signals for the uplink and downlink sections to correct frequency errors. For the uplink section, the carrier frequency offset of the downlink is reversed in the uplink. If the uplink is on a different frequency, the measured offset of the system master oscillator can be scaled by different synthesizer ratios.

The invention relates to an electromagnetic wave measurement while drilling system wireless remote receiving device and a measuring method and application of the electromagnetic wave measurement while drilling system wireless remote receiving device. The electromagnetic wave measurement while drilling system wireless remote receiving device comprises an antenna receiving array and a remote receiving unit which comprises a central processing unit, a control circuit, a wireless receiving and dispatching module and a power supply. The wireless receiving and dispatching module is connected with the central processing unit through the control circuit. The device is used for remotely receiving electromagnetic wave measurement while drilling system signals and used for receiving measurement signals in an electromagnetic wave measurement while drilling system. A digital signal processor (DSP) technology and an array signal processing technology are adopted to achieve suppression of well site noise. Through an array element with a reasonable layout, an advanced digital signal processing algorithm is matched to achieve remote receiving of weak electromagnetic signals, adaptive capacity, to different strata, of the electromagnetic wave measurement while drilling system is effectively improved, processing gain and receiving sensitivity are improved, and measuring depth is improved.

The invention discloses a method to reduce switch fault between a bypass of an uninterruptible power supply (UPS) and an inverter circuit, which is characterized in that: a control circuit first judges out the switch mode, either from the bypass to the inverter circuit or from the inverter circuit to the bypass; when a switch is conducted by the UPS; a real and strict synchrony between an invert output and a bypass input is realized while UPS is conducting the switch by utilizing the constantly matured DSP technology, i.e. matching (the same frequency, the same phase and the same amplitude). The invention has the advantages of lowered UPS fault and reduced cost.

The invention discloses a control method for a household modern comfortable equipment combination based on a DSP technique. Functional modules such as an audio and a video involved in the method are dispersed in a control system, people can construct a virtual audio-video scene in a room according to personal preference by virtue of a topological and genetic optimization algorithm routine of a main processor utilizing a DSP as a core based on the control of a clock loop, a daily schedule law can be predicted through a clock loop routine to remind people of watching a film within law time, and a system can automatically detect the temperature, humidity and quality of air and automatically regulate the temperature, the humidity and the quality to optimal values; a life recorder records important things in the life; a human body health detector detects health indexes of people at any time so as to early prevent diseases; and by virtue of a proper position layout, equipment such as the audio and the video can be placed at proper positions according to an optimal individual principle, so that the audio-visual feel and the comfort level of the people in the family are improved, and the family life is more comfortable, efficient and intelligent.

The invention relates to a visual navigation path recognition system of a grain combine harvester. After the system is loaded and a driver aligns a harvesting line, the system can detect line parameters of navigation paths of the grain combine harvester automatically through a camera (video camera), conduct navigation path planning to form navigation path information and finally transmit the navigation path information to a combine harvester visual navigation steering control system based on a single-chip microcomputer through an ARM kernel 12C bus and single-chip microcomputer communication unit based on a 12C bus. The visual navigation path recognition system of the grain combine harvester combines an image processing technology and the Vinci technology (DSP technology), is low in power consumption, capable of achieving equipment miniaturization and convenient to install, increases the navigation path recognition speed of the grain combine harvester, improves the navigation path recognition accuracy of the grain combine harvester, has high real-time performance, accuracy and robustness, and is suitable for being popularized and used.

The invention discloses a method for controlling arc welding inversion on the basis of a DSP chip, wherein a system comprises a rectification inversion filtering functional module, an IGBT grid driving module, a DSP central processing module, an input and output module, a sense amplification module and an overload signal detecting module. The method comprises: closing a total interruption and a watchdog, setting a register, initializing a digital analog conversion unit in the DSP central processing module, setting a whole comparison register and a dead area control register, allocating an I/O pin, setting a timer, allowing underflow, cyclic interrupt and underflow interrupt, setting an EVAIMRA and an IMR, allowing INT1 and INT2 interrupts, eliminating interrupt identification, opening a total interrupt, and entering a circulating waiting status. The invention applies the DSP technique in controlling an arc welding inverter system, more stable, precise and flexible performances can be provided, the control is flexible and intelligentized, the hardware design is simple, the software design is flexible and diversified, demanded peripheral circuits are few, and the method has wide application prospect.

The invention discloses an audio-video network converter, which comprises a hardware part and a software part, wherein the hardware part comprises a DSP core processor and a functional unit elements connected with interface ends of a bus of the DSP core processor; and the software control part comprises functional modules for realizing data transmission and control, and the functional modules control the hardware part to realize the transmission and conversion of various audio and video data of intelligent cells. The invention also provides a method for transmitting and converting the audio and video data by using the audio-video network converter. In the invention, the audio-video network converter and the data conversion method are developed by using broadband networks of cells and also fully using self-controlled DSP technology, streaming media technology, embedded product development technology and advanced audio and video compression and decompression technology, a technical revolution in the field of conventional analog visual conversation is brought and the construction and development of intelligent cells in China are promoted.

The invention discloses a digital signal processor (DSP)-based high-precision ultrasonic distance measurement system. The system comprises a DSP, and an acoustic wave receiving and transmitting unit, an echo conditioning circuit, a digital correlation unit and a conversion and amplifying unit which are connected with the DSP, wherein the acoustic wave receiving and transmitting unit is connected with the echo conditioning circuit; the echo conditioning circuit is connected with the digital correlation unit; and the digital correlation unit is connected with the conversion and amplifying unit.The invention also discloses a DSP-based high-precision ultrasonic distance measurement method. By combining a DSP technology with a digital correlation technology, the rough measurement and the precise correction of a target distance to be measured are realized, the measurement precision of the system is effectively improved, and noise in the ultrasonic distance measurement step is effectively suppressed; and by calibrating the errors of the system, the influence of circuit factors and environmental factors on the distance measurement system is effectively eliminated, and the system has relatively high precision under the conditions of both micro distance measurement and super-large distance measurement.

There is provided an implantable cardiac pacing system or other cardiac monitoring system having an enhanced capability to classify intracardiac signals through a combination of DSP techniques and software algorithms. The implantable device has one or more DSP channels corresponding to different signals which are being monitored. Each DSP channel most preferably amplifies the incoming signal, converts the signal from analog to digital form, digitally filters the converted signals to provide a filtered signal, operates on the filtered signal to provide a slope signal, determines from the filtered and slope signals when an intracardiac event has been detected, signal processes the filtered and slope signals for a predetermined analysis interval after threshold crossing, and generates a plurality of wave parameters corresponding to the signal. The generated wave parameters are further operated on by a programmable algorithm to classify the detected event based upon DSP-generated parameters, and then monitor or detect the onset, development or presence of an undesired heart condition in a patient. The system may further provide for the delivery of treatment, storage of intracardiac data, or provision of a warning to a patient or physician in response to the detection of such a heart condition.

The invention relates to a frequency agility synthesis method compatible with microwave large band width and mid-frequency small step and a device thereof. The invention is characterized in that direct simulation type frequency synthesis, direct digital frequency synthesis, and DSP(digital signal processor) technology are combined to perform frequency synthesis, so as to make the best of the advantages of the mentioned technologies, avoid technical defects, realize the optimization of all technical indexes of the frequency synthesizer, has a better expandability on the design of frequency band width and at the same time is compatible with large band width microwave frequency agility and mid-frequency small stepping frequency agility signal functions.

The invention discloses an intellectual structure self-healing method and health monitoring system. The intellectual structure self-healing method is a brand new intellectual structure self-healing and self-diagnostic method which realizes damage self-healing of a composite material by adopting sun light energy and a light curing technology and also realizes health monitoring on the basis of a neural network and a digital signal processing technology. In the invention, a light curing binding agent is used as a light curing remediator which is placed hollow fiber coated with a photomask agent and a coupling agent, when the material has cracks, fiber in front extension edges of the cracks fractures, the photocuring restoration agent permeates in the damaged cracks, and thus the damage self-healing of the material is realized by adopting the sun light as supply energy; meanwhile, an optical fiber sensor is used as a signal transmitting and sensing element, the health state of an intellectual structure is monitored by combining the digital signal processing technology. The invention has the characteristics of strong practicability, low cost, environment protection, energy saving and the like and provides an effective solution scheme for realizing the self-healing and health monitoring of a member made of composite material.

The invention provides a shipborne overwater wireless communication monitoring system, which comprises a shipborne correlation interferometer direction-finding antenna array, an electrical rotation unit, an RF amplifier module, a card direction finding receiver, a direction-finding control processing module, an embedded computer system and a power supply module. The system has the advantages that an integrated design, the intermediate frequency signal technique and the modularized combination are adopted; the built-in embedded computer system is adopted, so that the structure is compact and portable; the portable passive correlation interferometer direction-finding antenna is adopted to solve the mutual coupling between the antenna array cells to eliminate the coupling and the phase ambiguity between element antennae; the multifunctional amplifier is adopted and automatically switched to enlarge the dynamic application range of the received signal; the card double-channel monitoring direction-finding receiver is equipped, so as to carry out the monitoring and the direction-finding by a sharing time, and switched into the radio monitoring without the need of the direction-finding; and the compensation algorithm software is corrected and combined with an electronic nautical chart and a ship recognition system to meet the requirements for the overwater/offshore monitoring.

The invention relates to a liquid crystal device-based novel intelligent polarimeter and a test method. The test method comprises that: a polarizer and an analyzer are regulated to be orthogonal and fixed before an optical active substance is added; after the optical active substance is added into a polarization tube, light emitted from a light source sequentially passes through the polarizer, a liquid crystal sheet, the polarization tube used for placing a substance to be detected, and the analyzer to reach a photoelectric cell, and the photoelectric cell outputs a signal; the signal is processed to obtain a rotation angle of the optical active substance; and the rotation angle is displayed. The liquid crystal sheet takes the place of a Faraday coil in the conventional polarimeter, and simultaneously, a motor, a corresponding servo motor and a mechanical transmission part are saved, so the cost and volume of the polarimeter are reduced; and in combination with digital signal processor (DSP) technology, the test method has the advantages of improving the signal processing capacity, setting different measurement modes by using a touch screen, and improving the intellectualization degree and measurement accuracy of the polarimeter.

The invention discloses a multi-interval simulation testing system based on field application of a digital substation. The testing system utilizes DSP technology to carry out a simulation test a faultpoint in a power line and the action logic between protection devices thereof, and includes a simulation host and analog quantity output slaves. The simulation host and the analog quantity output slaves are connected via optical fibers. The testing method used in the invention is to place the plurality of analog quantity output slaves separately in front of merging unit devices at different intervals, use the simulation host to remotely and synchronously control the simulation output through the optical fibers, and at the same time, test the plurality of merging units with increased quantity.Goose signals returned by the protection device actions can be received and switch quantity action nodes can also be received to realize the closed-loop test, the joint adjustment of an intelligent power grid system is achieved, and the working conditions when the entire station system actually operates is truly reflected.

The invention discloses a method for keeping constant pressure water supply for an urban water supply pipe network. A digital radio is utilized to achieve long-distance data transmission and adopts aDSP technology for self-adaptive balance, a main digital ratio is arranged in a water system control center in the city, main digital ratios are arranged in all subordinate water plants respectively to be used for mutually transmitting data and are mainly in charge of uploading pressure and flow of a main pipe network and water plant data, a pressure transmitter and an electromagnetic flowmeter acquiring device are added on an inlet and an outlet of the pipe network respectively, a signal is wirelessly transmitted, data is transmitted to a water pump house monitoring center through a DSP, datacommunication is conducted with a PLC system of a water delivering pump house of a large earth surface water plant, a water delivering pump is interlocked with pipe network pressure data, and a waterdelivering frequency converter achieves PID control. To solve the problems of water pressure fluctuation among urban tap water pipe networks and long-distance communication, the novel control methodis provided, pressure is automatically kept balanced, and stable water supply is guaranteed.

The invention discloses a DSP (digital signal processor) based control system of an uninterrupted power supply, comprising a DSP core processor, an isolation transformer, an AC/DC (alternating current/direct current) module, a charging circuit, a storage battery, a discharging circuit and a DC/DC voltage stabilization module, wherein the isolation transformer is connected with the DC/DC voltage stabilization module through the AC/DC module and the DSP core processor sequentially, and the storage battery is directly connected with the DSP core processor. By utilizing a DSP technology, the DSP based control system disclosed by the invention realizes a digital control direct current uninterrupted power supply, and characteristics and performances of a power supply control system are immediately changed, so that the flexible and quick response speed of the system is increased, and the reliability and the maintainability of operation of the uninterrupted power supply are improved.

The present invention discloses a seamless line parameter real-time monitoring method based on í‹intelligent electronic eyeíŒ for monitoring railway seamless line parameters. Said method includes the following steps: (1), utilizing camera technique to collect field seamless line image; (2), adopting DSP technique to make image identification treatment to real-time produce seamless line parameter; (3), adopting GSM wireless network transmission technique to transfer the above-mentioned parameter to monitoring centre; and (4), combining field seamless line real-time measured parameter with seamless line management system, and comparing theoretical allowable value with actual measured value so as to implement real-time monitoring control of seamless line parameter and alarm.