184 results about "Dsp digital signal processor" patented technology

Provided are a robot motion track locating method and a robot motion track locating device. The robot motion track locating device comprises a robot controller, a pulse controller, an actuator, a motor and a robot body. The robot controller sends a command to the pulse controller. The pulse controller receives the command, and drives the actuator to control the motor to rotate. The pulse controller receives the number of command pulses of each period of the robot controller. S-shaped curve acceleration and deceleration is carried out by the pulse controller on a received position point to be used as a rough interpolation operation, positional values of continuous commands of each period of the robot controller are obtained, the speed when the robot body reaches each position point is obtained through a slope value between two adjacent points, and a speed section which the speed belongs to is confirmed on an S-shaped curve, i sections of variables are divided between two position points, a PVT space arc fine interpolation operation is carried out on each variable section, and a pulse output function in a DSP digital signal processor of the pulse controller is called to carry out pulse sending. The robot motion track locating method and the robot motion track locating device enable a robot to stably move, improve locating accuracy and speed responsiveness of a system, and save production cost of an enterprise.

The present invention aims at disclosing an active-passive-typed endoscopic surgical robot, which is used for the necessary endoscopic pose adjustment in the minimally invasive operations. The invention includes a carrying vehicle, an ascending and descending mechanism, a big swivel arm and a small swivel arm, a stepping motor, an endoscope clamping device and a control system which is composed of a control panel, a DSP digital signal processor and a stepping motor driver. The information which can be received by the DSP digital signal processor is generated by using the invention and pushing the operation buttons on the operation panel, and the relevant instructions can be also emitted with the help of the stepping motor driver, so as to change the rotation direction and angle of the big swivel arm and the small swivel arm; then, the endoscope which penetrates the abdominal (chest) wall of the patients is moved under the restraints of the skin at the insertion point, so as to obtain the best image of the surgical site on a display. The active-passive type is differentiated by whether a moving bar is provided with a controllable motor for dragging. The invention has simple structure and control principle, relatively low production cost and can facilitate the development and production of the products.

The invention discloses a signal processing circuit of a fluxgate sensor. The signal processing circuit of the fluxgate sensor comprises a DSP (digital signal processor) and a signal feedback unit; an environment voltage signal collected by a fluxgate probe is linked with a digital signal processor through a bridging circuit and a programmable gain amplifier; the signal feedback unit feeds the processing signal of the digital signal processor back to the front end of the bridging circuit; the DSP comprises an analogue-digital converter, a digital frequency selector, a phase sensitive detector and a magnetic field calibrating module; the signal feedback unit comprises an interpolation calculation module, the analogue-digital converter and the programmable gain amplifier; the DSP receives the signal of the fluxgate probe, and outputs the size of the tested environment magnetic field by means of analogue-digital conversion, digital frequency selecting filtering, phase-sensitive rectifying and magnetic field calibration orderly; the measurement precision and the product performance of the fluxgate sensor are improved by digital treatment of the environment signal, so that adjustment and upgrade of the system are more convenient.

Pick-up head in use for monitoring load condition in real time and display screen for displaying image of load condition in real time are installed inside vehicle at proper position in the disclosed method. Through ports connected to the control system, brake signal, engine signal, reversing signal, and ignition signal are input to relevant ports of single chip, and these signals control actions of system. The control system includes MCU single chip, DSP, two pieces of data memory, ROM program memory, RAM, Sensor image sensor (pick-up head), USB interface and display screen.

The present invention relates to an embedded human face automatic detection equipment based on DSP by using video flow and its method. Said equipment mainly is formed from human face detection software, camera or A/D converter, DSP digital signal processor chip, image sampling logic module, external high-speed static data memory, external high-speed program memory, high-speed serial input/output module, control/decoding module and power supply module. Said system can automatically detector out standardized human face from complex scene for implementing various identity identification and identification operation. It has extensive application, for example, controlling exit and entrance, and for various TV monitoring and alarm systems.

The invention discloses a protecting and measuring integrated comprehensive distribution box. A distribution transforming monitor terminal comprises an analog acquisition module, a digital signal processor, a CPU, a clock module, a digital memory, an I/O module and a communication module. The analog acquisition module is connected with the CPU through the DSP. The clock module, the digital memory, the I/O module and the communication module are respectively connected with the CPU. The distribution transforming monitor terminal further comprises a control interface, a state quantity acquisition interface and a communication interface. A reactive compensation switch, an inlet line switch, a control power switch, a feeder line switch and a reactive compensation device are connected with the distribution transforming monitor terminal through the interfaces. The protecting and measuring integrated comprehensive distribution box can integrally monitor and manage a distribution transformer and a low-voltage distribution power grid in a telemetering mode, a telecommand mode, a remote regulating mode and a remote control mode, and can automatically coordinate and adjust the action modes and operation modes of various devices in the distribution box according to factors such as fault types, fault ranges and the urgent degree.

This invention relates to one rotation device fault test machine based on sound emission technique, which comprises sound emission sensor, signal adjust and automatic gain amplifier module and digital signal process module, wherein, the digital signal process module comprises DSP digital signal processor, Flash data memory, RAM data memory, RS232 series chip, programmable logic controller, keyboard, and LCD display.

The invention provides a method for accurately calculating power harmonic wave parameters through adopting a time delay Fourier transform frequency measurement method, and belongs to a method for automatically monitoring an analytical instrument and an automatic monitoring device used for voltage and current waveform distortion of various power networks. The method includes the following steps: firstly, truncating sampled power harmonic wave signals through adopting a symmetrical window function; performing fast Fourier transform (FFT for short) for the truncated signals; truncating sampled power signals of the same length through adopting the same symmetrical window function at a time delay L point of the sampled power harmonic wave signals, and performing FFT for the truncated signals; accurately calculating out the fundamental wave and the frequency of each harmonic wave as per the phase difference of angle of the FFT performed for two times; calculating out the fundamental wave and the correction factor of each harmonic wave through adopting the method of interpolation in the frequency domain of the dissymmetrical window function; and finally, calculating out the amplitude value and the phase position of each power harmonic wave. The method provided by the invention has remarkable advantage with respect to the time spent in calculation as compared with other windowed FFT interpolation correction and analysis methods, best suits the DSP with hardware FFT, and is a practical algorithm.

The invention relates to the field of monitoring, and particularly relates to an automatic identification and monitoring system for indoor noise pollution. Firstly, the sample collection of a noise signal is conducted by an FPGA multi-channel microphone array. Secondly, the pre-treatment, the characteristic extraction and the characteristic selection of the noise signal are conducted by a digital signal processor (DSP), and a characteristic model is established for the noise signal at a cloud end. Thirdly, the noise monitoring information corresponding to a noise source is identified based on the technique matched with the noise signal characteristic mode. Finally, the noise identification information is graphically displayed on a main interface. According to the technical scheme of the invention, users can be effectively aware of noise pollution hazards. Meanwhile, users are reminded of getting away from noise hazards and actively taking prevention measures. Meanwhile, the living environment is improved. furthermore, the system plays a positive role in promoting the economic development.

The invention relates to a signal-digit conversion method for a rotating transformer which is characterized by simultaneously carrying out digitle processing on the signals of the rotating transformers of a plurality of channels and converting a sine modulation signal Vs and a cosine modulation signal Vc outputted by the rotating transformer into a binary digit angle signals by the resolving method of a DSP digital signal processer. The invention consists of signal conditioning circuits, digital integrators, a clock oscillator and the DSP digital signal processer. Each rotating transformer channel is connected with one signal conditioning circuit; each signal conditioning circuit comprises two A/D convertors and a zero-crossing detector; each signal conditioning circuit is connected with one digital integrator; each digital integrator consists of two shift registers, two digital accumulators, two flip-latches and an address encoder. The measuring signal channel qualities of the conversion technology of the invention are more; the signal frequency range is broad; the digital angles are resolved by software, thus reducing the hardware cost, reducing the size and having a high cost performance.

The present invention relates to a control method of a parameter self-tuning motor controller, and is a motor control system method of realizing the high-performance control of three closed loops (a current loop, a speed loop and a position loop). The control method of the parameter self-tuning motor controller of the present invention is based on the DSP design, has the strong digital operation and motor control capability, and can be widely used in the industry fields, such as the intelligent wheelchair control, the unmanned mower, the industrial automation, the National defence aviation, etc. Meanwhile, a DSP-based mobile motion controller parameter tuning method is developed, so that a motion controller speed and position controller PID parameter self-tuning practical technology is realized.

The invention discloses a multifunctional intelligent anti-collision device of an automobile. The device comprises an air bag, anti-collision detecting units and an anti-collision controller. The anti-collision detecting unit comprises a front camera, a head ultrasonic distance measurement sensor, a rear camera, a tail ultrasonic distance measurement sensor, an infrared human detection sensor, an automobile speed sensor and an acceleration sensor. The anti-collision controller comprises a DSP digital signal processor, a voltage conversion circuit module, a touch liquid crystal display, a Flash memory, a USB communication circuit, a GPRS wireless communication module, a clock circuit module, a signal conditioning circuit, a voice play circuit and a relay. The multifunctional intelligent anti-collision device of the automobile is simple in structure, reasonable in design, convenient to use and operate, capable of avoiding accidents such as reversing collision, collision with an obstacle ahead due to acceleration, collision with a rear obstacle due to emergency braking, secondary collision after a car accident and the like, complete in functions, high in working stability and reliability, high in practicality and convenient to popularize and use.

The invention discloses a wearable electrical impedance tomography gastric motility information extracting device. The wearable electrical impedance tomography gastric motility information extracting device comprises an electrode array belt, a switch array, an impedance signal measurement module, a DSP and a wireless data transmission module. The electrode array belt is composed of a pasting strip and electrode buckles distributed on the belt at equal intervals and is connected with the switch array through a wire. The switch array is composed of an excitation gating switch and a measurement gating switch. An excitation current source is composed of a DDS multi-frequency signal generation unit and a voltage and current conversion module, and excitation current is injected in a corresponding electrode pair of the electrode array belt through the excitation gating switch. The impedance signal measurement module is composed of an instrumentation amplifier, a programmable amplifier, a demodulator and an AD conversion module. The measurement gating switch picks up impedance signals of the corresponding electrode pair on the electrode array belt and converts the impedance signals into digital information, and the DSP uploads the generated digital information to a portable intelligent device through the wireless data transmission module for processing.

The invention discloses a data recording analysis system and method for a maneuver missile launching device. The data recording analysis system comprises a missile launching device data recording device and an upper computer. The missile launching device data recording device comprises an ARM microcontroller module, a power module, a digital signal processor (DSP) module, a data storage card slot, a universal serial bus (USB) interface circuit module, a power switch, a video decoder, an analog to digital (A/D) conversion circuit module, a first voltage conversion circuit module, a camera, a second voltage conversion circuit module, a data storage card, a keyboard, a video output interface and a display. A USB interface of the upper computer is connected with a card reader. The method comprises a first step of installation, a second step of benchmark data collection and recording, a third step of shooting data collection and recording and a fourth step of data download, analysis and process and display. The data recording analysis system and method are novel and reasonable in design, convenient to achieve, high in data recording precision, good in judgment accuracy, and complete in function and high in practicality and popularization application value.

The invention discloses a dynamic video tracking system based on sound source positioning. The dynamic video tracking system comprises a plurality of microphones, an audio acquisition module, a digital signal processor (DSP), a phase-locked loop, a flash module, a field programmable gate array (FPGA) module and a synchronous dynamic random access memory (SDRAM) module. In order to overcome the defects of the conventional video tracking monitoring technology, an audio signal is acquired by a microphone array which consists of a plurality of microphones, transmitted to the audio acquisition module and subjected to analog to digital (A/D) conversion; a corresponding digital signal is transmitted to the DSP, and an azimuth angle and a control signal are obtained by processing operation through a relevant algorithm program, transmitted to a universal asynchronous receiver/transmitter (UART) and subjected to parallel-serial conversion; and the control signal is transmitted to a stepping motor and a holder, so tracking shooting of a target sound source can be realized. Compared with the prior art, the dynamic video tracking system has the advantages that a small number of cameras are required to be installed, a monitoring area is ensured, and production cost can be reduced.

The invention discloses an indoor self-positioning and self-directing two-dimensional navigation system, which comprises a micro-electro-mechanical system (MEMS) gyro sensor, a digital signal processor (DSP), a digital servo, ultrasonic transceivers and the like. The two-dimensional navigation system is installed on a motion carrier. On one hand, the DSP processes the measurement data of the MEMSgyro sensor to obtain the deflection angle of the motion carrier relative to the initial position; and on the other hand, the DSP conducts controllable adjustment to the alignment orientation of the ultrasonic transceivers which are distributed on the two sides of the carrier and are fixedly connected onto the rocker arm of the servo through adjusting the deflection angle of a rocker of the digital servo, so as to realize a scanning ranging mode and an orienting ranging mode and to obtain the perpendicular distance from the carrier to an obstacle surface; the DSP converts variables for controlling the deflection angle of the digital servo in the processor when echoes are received into corresponding ranging pointing angles at the moment; and finally the DSP updates the position coordinatesof the current carrier relative to the initial position according to position updating matrices to complete one time of local self-positioning and self-directing of the motion carrier.

The invention discloses an interactive control type energy-saving LED street lamp device consisting of a street lamp control host and a street lamp sub-machine which is respectively arranged in lamp boxes of most street lamps, wherein the street lamp control host is provided with a network interface which forms a connecting line on a public network with an external supervision device, an electrically connected network interface, a DSP (digital signal processor) for processing the signal in and out of the network interface, an electrically connected DSP, a control processing core module for editing, storing, analyzing, managing and processing the input and output signals, a matched LCD, a setting manipulator for executing function and data setting and manipulating of the control processing core module, an externally connected ANT and a wireless core module which is electrically connected with the control processing core module. After the overall building is completed, the street lamp can provide safety illumination with excellent illuminance when cars drive on the road, automatically saves energy when no cars drive on the road and achieves the benefits of positive electricity saving.

The invention discloses a method and apparatus for controlling the operation velocity of a linear servo system of a high-precision numerical control machine tool. The method includes the following steps: adopting a fuzzy sliding mode controller, adopting the exponential approach law at an approach motion stage, and adopting fuzzy control to realize switch control of a sliding mode at a sliding mode motion stage. The method enables a system to have excellent robustness and anti-interference capability, reduces buffeting of the operating velocity of the system, and accelerates responding velocity of the system. According to the invention, the apparatus includes a DSP digital signal processor unit, an A/D module, a rectification filtering module, a linear motor, an IPM intelligent power module, an encoder, a sensor, a current detecting module, a photoelectric isolation module and a fault detection module, etc.

The invention provides a digital-shaft angle signal converting method. The method is characterized in that: a circuit realizing the method comprises a digital-sine and cosine signal converting circuit, an electronic wide-frequency and wide-voltage SCOTT transformer and a digital signal processor (DSP), wherein the digital-sine and cosine signal converting circuit consists of a subdivision circuit and a rough division circuit; the subdivision circuit is a resistance network digital/analogue (D/A) conversion circuit which is less than 16 bits; the rough division circuit consists of a precise resistance network, a precise operational amplifier and an analogue switch; and the electronic wide-frequency and wide-voltage SCOTT transformer consists of a mode operational circuit, a voltage amplitude value operational circuit and a power driving circuit. Full electronic technology is adopted by the digital-shaft angle signal converting method; a wide-frequency and wide-voltage differential synchro signal or rotary transformer signal can be output; the conversion precision is high; and the expandability is high.

The invention relates to an anti selective interference self-adapting trap for spread-spectrum system which comprises: anti mixing filter module, A/D converter module, digital down converter module (DDC), first in first out module (FIFO) and digital signal processor (DSP) connecting with each other in series; field programmable gate array (FPGA) separately connected with power supply, DDC, FIFO and DSP modules; crystal oscillator separately connected with A/D converter, DDC, DSP and FPGA; storage unit connected with DSP. The invention has the advantage of connecting with present devices, simple structure and high anti interference property.

The invention provides a method for estimating a power harmonic wave parameter by using a power gravity center of a symmetric window function, belonging to an analysis and automatic monitoring method of electric network voltage and current waveform distortion. The method comprises the following steps: using the symmetric window function to cut a sampled power harmonic wave signal, and carrying out fast Fourier transform (FFT for short) on a cut signal; calculating fundamental wave frequency and frequency of each subharmonic according to the power gravity center of the symmetric window function; calculating a phase of each corresponding subharmonic by using the calculated frequency of each subharmonic, and calculating an amplitude of each sub-power harmonic through the Pasival theorem. Compared with other windowing FFT interpolation correction analysis methods, the method of the present invention has an obvious advantage at calculation time consumption, is suitable for being used for an embedded system and a digital signal processor (DSP), and is a very practical algorithm.

A digitalized man-machine interactive system of micro-beam plasma welding is prepared for applying DSP digital signal processor and using and DSP chip TMS 320 F 240 to receive command issued by operator through keyboard, using monolithic computer to control output of display and utilizing character liquid crystal display module as display for displaying both parameter values and welding process information of micro-beam plasma.

The invention discloses a digital ultrasonic transcranial Doppler digital demodulation signal processing method and device. The method comprises the following steps: performing the A/D (analog/digital) sampling on an input frequency-modulated wave which is a non-demodulated ultrasonic echo signal, and then performing the amplitude limiting through a digital comparator; detecting a modulation signal reflected on the frequency conversion in a frequency-modulated save subjected to the amplitude limiting; and taking the absolute value of the modulation signal, responding the changes of the amplitude of the modulation signal to an envelope line, and acquiring a low-frequency modulation signal through a down-sampling low-pass filter. The device comprises an AD converter, at least two large-capacity high-speed caches FIFO (first in first out), a DSP digital signal processor), and an FPGA (field programmable gate array). According to the invention, the wide frequency band scanning and the full-depth scanning can be realized, the timeliness and signal-to-noise ratio (SNR) of the system are improved, a blood flow dynamic parameter is accurately extracted, the SNR of a detecting signal is improved, and the quality of a frequency spectrum image is improved.