51 results about "Digital signal" patented technology

When a shutter button of a digital camera is pressed, a picture signal fetched from a CCD is converted to a digital signal and compressed and written into a nonvolatile memory means like a flash memory card as a picture file which can be identified uniquely. By turning on a reproduction switch, a picture file is read out from the nonvolatile memory means, the compressed data is expanded and converted to an analog signal, and the converted picture is displayed on a liquid crystal display. By pressing a display feed key, another picture file is read out and displayed. A user can produce a control file for controlling print processing, display processing, transmission processing and the like for the picture file by selecting a particular picture file using an operation key. The nonvolatile memory means can be removed. By mounting this memory means on a printer unit, display unit or picture transmission unit, the digital camera also can be used during print, display or transmission of the picture. If multi-screen print is carried out on the printer unit, a vertical direction of each picture is unified. Further, upon reprint operation for multiple order persons, sorting work after the print is facilitated by providing with an identification means for identifying each order person.

Endoscopic arrangement comprising a first distal end, an imaging device arranged at the first distal end, a first proximal end for connection to a supply unit, a data transmission element embodied as a light guide and having a second distal end and a second proximal end, and comprising an electro-optical converter, wherein the electro-optical converter is configured to convert digital data generated by the imaging device into an optical signal, wherein the data transmission element at its second distal end is optically coupled to the electro-optical converter for coupling the optical signal into the data transmission element, wherein the imaging device comprises at least two data outputs each having a digital output signal, and wherein a first signal converter is provided between the imaging device and the electro-optical converter for combining the digital output signals into a digital combined output signal.

An apparatus is provided for detecting Macro Sleep Architecture states of a subject such as WAKE, NREM and REM sleep from a subject's EEG. The apparatus includes an EEG digital signal assembly of modules arranged to convert analogue EEG signals into digital EEG signals. A bispectrum assembly is responsive to the EEG digital signal assembly and converts the digital EEG signals into signals representing corresponding bispectrum values. A bispectrum time series assembly, in electrical communication with an output side of the bispectrum assembly, generates at least one bispectrum time series for a predetermined frequency. A macro-sleep architecture (MSA) assembly is responsive to the bispectrum time series assembly and is arranged to produce classification signals indicating classification of segments of the EEG signals into macro-sleep states of the subject.

An electronic system includes a three terminal device having a light emitting portion and a magnetically sensitive portion. The magnetically sensitive portion is for modulating light emission from the light emitting portion. The device is a spin valve transistor having a light-emitting quantum well in its collector. The device can convert a magnetic digital signal to both an electrical digital signal and an optical digital signal, wherein either or both of these signals can be provided as a device output. The magnetically sensitive portion of the device is formed of a pair of magnetically permeable layers. When the layers are aligned electron current can pass through with sufficient energy to reach a quantum well where they recombine, generating light. The device may be used to read a magnetic storage medium, such as a disk drive. Or it can be used to provide a display or a memory array composed of single device magnetic write, optical read memory cells. Amplification can be provided to the transistor by adjusting the collector base voltage to provide secondary electrons by impact ionization to provide greater electron current and a correspondingly larger optical emission signal.

The invention relates to the technical field of fluid measurement, and provides a flow rate measuring system and a flow rate measuring method for multi-phase fluid. The system comprises a measurement module, a signal amplification module, a data processing module and a terminal module which are connected in turn, wherein the measurement module at least comprises two measurement devices arranged on a pipeline at a certain interval, and the two measurement devices respectively measure the content of the same element passing the sections where the devices are positioned by a nuclear physics method; the signal amplification module is respectively connected with the two measurement devices and amplifies signals acquired by measurement; and the data processing module converts the signals into digital signals first, then performs digital lowpass filtering treatment and quantization treatment on the digital signals, establishes a mathematical model by utilizing a cross-correlation function principle, performs data analysis treatment on the digital signals, and outputs results of a flow and a flow rate to the terminal module. The system and the method reduce the measuring complexity, reduce corresponding errors caused and improve measuring accuracy and reliability.

Methods and apparatus are provided for coding and decoding a digital audio signal. Decoding includes: decoding according to an inverse transform decoding of a previous frame of samples of the digital signal, which is received and coded according to a transform coding; and decoding according to a predictive decoding of a current frame of samples of the digital signal, which is received and coded according to a predictive coding. The predictive decoding of the current frame is a transition predictive decoding which does not use any adaptive dictionary arising from the previous frame. At least one state of the predictive decoding is reinitialized to a predetermined default value, and an add-overlap step combines a signal segment synthesized by predictive decoding of the current frame and a signal segment synthesized by inverse transform decoding, corresponding to a stored segment of the decoding of the previous frame.

In order to transmit high-speed digital signals of several tens of GHz through differential lines, a signal transmission system for transmitting digital signals between circuit blocks via signal transmission lines is provided by connecting a ground-referenced differential line to a non-ground-referenced differential line, Each circuit block basically includes a functional circuit, a receiving/transmitting circuit formed separately from the functional circuit, and an impedance-matched transmission line (115) formed between the receiving end and the transmitting end of the receiving/transmitting circuit; reference ground (110) The differential line (105) is drawn from the differential output driver, and a differential signal line is formed symmetrically with respect to the ground (110) in the circuit block. In the signal transmission line (115), there are only differential pair lines that are not referenced to ground (111, 112) extend directly from differential signal lines arranged symmetrically with respect to ground potential.

A system and/or method for sensing the presence of moisture (e.g., rain) and/or other material(s) on a window such as a vehicle window (e.g., vehicle windshield, sunroof or backlite). In certain example embodiments of the invention, at least one sensing capacitor is supported by a window such as a vehicle windshield, the capacitor(s) having a field that is affected by moisture (e.g., rain) on a surface of the window. A sensing circuit outputs an analog signal that is based on and/or related to the capacitance(s) of the sensing capacitor(s). The analog output of the circuit may be converted to a digital signal via sigma-delta modulation, and subjected to processing (e.g., correlation) for determining whether moisture (e.g., rain, dew, fog, etc.) or the like is present on the surface of the window.

The invention discloses a soot-blowing control device for a boiler furnace based on heat flow online measurement, which comprises a heat flow sensor, a multiplexer, a data collector and an industrial personal computer, wherein the heat flow sensor is arranged on a film-type water wall fin at the periphery of the boiler furnace and connected to the input end of the multiplexer and used for transmitting collected heat flow to the multiplexer; the multiplexer is sequentially connected with the data collector and the industrial personal computer and used for multi-channel switching, signal amplifying and filtering; the data collector is used for converting a heat flow analog signal to a digital signal; and the industrial personal computer is used for analyzing the digital signal transmitted from the multiplexer and sending a soot-blowing signal. The invention can be used for various coal-fired power plants; and according to fouling conditions of heating surfaces in each region of the boiler furnace, realizes the sweeping in a demand quantity for the required region, improves the accuracy and the real time of fouling diagnosis for the heating surfaces of the boiler furnace, reduces the boiler failure, prolongs the lifetime of a soot-blower, saves the maintenance workload of the soot-blower, and the like.

The invention discloses a chopper-type direct current detection method and a circuit. A forward voltage and a backward voltage of two ends of a shunt resistor are continuously collected in real time through a certain frequency. A sampling value of a first half of a chopper period and a sampling value of a second half of the chopper period in a same chopper period are calculated and influences of a low-frequency noise, an offset voltage and other noises on a detection result are eliminated. The detection circuit comprises a shunt resistor, a simulation switch, an amplifier, an analog-to-digital converter and a control unit. The simulation switch is connected in parallel to two ends of the shunt resistor. An input terminal of the amplifier is connected to an output terminal of the simulation switch. An input terminal of the analog-to-digital converter is connected to an output terminal of the amplifier. An input terminal of the control unit is connected to an output terminal of the analog-to-digital converter. An output terminal of the control unit is connected to a control signal input terminal of the simulation switch. On one hand, the control unit provides a digital signal to control switching of the simulation switch; on the other hand, according to digital forward and backward voltage signal, the control unit acquires a direct current detection value. A circuit structure provided in the invention is simple; test accuracy is high and cost is low.

The invention discloses an intelligent monitoring device for temperature and insulation state of a 330KV high-voltage cable in a hydropower station. The device is characterized by being provided with a central processing module unit (CPU), a data acquisition and conversion unit, a light transmitting/receiving module, an alarm output module, a plurality of optical fiber temperature sensors and a plurality of current sensors, wherein the data acquisition and conversion unit is used for transmitting digital signals to the CPU under the control of the CPU; the light transmitting/receiving module is used for transmitting electrical signals to the data acquisition and conversion unit; the alarm output module can be used for communication with a remote monitoring system; the optical fiber temperature sensors are respectively arranged at the joints of the high-voltage cable to be detected and used for connecting temperature detection signals to the light transmitting/receiving module; and thecurrent sensors are respectively arranged on joint metal sheaths of the high-voltage cable to be detected and used for connecting current detection signals to the data acquisition and conversion unit. The device is particularly suitable for safety monitoring of the 330KV high-voltage cable in the hydropower station, can realize real-time monitoring of the temperature and the insulation state of the cable in the hydropower station, and can also ensure self safety.

The invention provides a power line carrier modulation method, a demodulation method, a circuit and a chip. The modulation method comprises the following steps of: detecting narrow-band nongaussian noise frequency in a power line; selecting non-noise frequency from a preset carrier frequency band as modulation carrier frequency; generating a modulation carrier according to the modulation carrier frequency; modulating a digital signal to be modulated to the modulation carrier to generate a power line carrier signal. By using the modulation method, the narrow-band nongaussian noise frequency can be avoided, the change of noise environment of the power line can be adapted, and the quality of power line communication can be improved.

Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband.

The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

In accordance with embodiments of the present disclosure, a digital microphone system may include a microphone transducer and a digital processing system. The microphone transducer may be configured to generate an analog input signal indicative of audio sounds incident upon the microphone transducer. The digital processing system may be configured to convert the analog input signal into a first digital signal having a plurality (e.g., more than 3) of quantization levels, and in the digital domain, process the first digital signal to compress the first digital signal into a second digital signal having fewer quantization levels (e.g., +1, 0, -1) than that of the first digital signal.

This invention relates to automatic test field and to emulsion liquid concentration automatic testing system and its method, which comprises sensor, A/D conversion unit, CPU unit, and single machine and display unit. The invention is characterize by the following: the sensor comprises one 850nm infrared laser diode tube, scattering and transparent mode tester and electric meter; the sensor converts the concentration signals into relative analogue voltage signals to convert voltage signal into digital signals through A/D conversion unit to send the digital signals into single machine memory unit for data processing and displaying the results.

The invention discloses an electrostatic type lampblack purifier lampblack monitoring cleaning system and a monitoring cleaning method. The electrostatic type lampblack purifier lampblack monitoring cleaning system comprises a purifier data collector arranged on a power supply circuit of an electrostatic type lampblack purifier and a fan data collector arranged on a fan, an analog-digital conversion unit, an industrial personal computer and a background server, wherein the analog-digital conversion unit is used for changing a current signal collected by the purifier data collector and the fan data collector into a digital signal so as to be sent to the industrial personal computer; the industrial personal computer is provided with a GPRS (general packet radio service) data transmitter module, the background server is provided with a GPRS data sending-receiving module, so that the data of the industrial personal computer is transferred to the background server so as to carry out real-time monitoring. The invention also discloses a lampblack monitoring cleaning method of the electrostatic type lampblack purifier. The purifier data collector collets an I practical peak value and an I practical valley value in each interval setting time, and the industrial personal computer executes a sweeping task according to a setting algorithm.

The invention relates to a method for executing a programmable logic controller (PLC) code. The hardware of a PLC comprises at least one high-performance Digital Signal Processing (DSP) and a RAM of a memory module. A software part comprises at least one main program applied to the DSP and a program translated DSP code of the PLC of a cycle ladder diagram. The invention translates a PLC program into the DSP code and executes the PLC code in the DSP. The PLC code is coated in the main program of the DSP so that the cycle scanning time of the PLC is not limited by the transmission speed of a communication interface, thereby the response ability of a system can be effectively improved.

The invention discloses an intelligent data transmission system and method. The system comprises an electronic device, an EEG (electroencephalogram) collector and a signal sampling element. The electronic device is connected with the EEG collector. The EEG collector is arranged on the head and is connected with the signal sampling element arranged on the head. The EEG collector is used for collecting a sensing signal of the signal sampling element and transmitting the signal to the electronic device. The electronic device comprises a main unit and a decoding unit. The decoding unit is used for receiving the signal from the EEG collector, converting the signal into a digital signal and transmitting the digital signal to the main unit. The intelligent data transmission system and method has the advantages that running of the electronic device can be controlled through detection of EEG, and the electronic device can be controlled more automatically and more conveniently.

This invention relates to a method for identifying odd-even field of digital video signals, in which, a video vidicon gets an original video flow as the input, which enters into the computer after being changed to a video data flow by a video collection card to be processed, operated by the computer, which reverses the odd-even sequence of the input video sequence once and compares the edge energies of the original input video sequence with that of the reversed one, and the smaller one is the correct one and is output so as to get video signals with correct field sequence.

A sensor device is provided with a voltage detection type sensor unit for converting a physical quantity into a voltage value and outputting a voltage signal indicating the voltage value; a chopper amplifier unit for generating a modulation signal by chopping the voltage signal output from the sensor unit with a predetermined chopping frequency, amplifying the modulation signal into an amplification signal, then demodulating the amplification signal and outputting it as an output signal; an integration unit including an operational amplifier, an input resistor connected to the inverting input terminal of the operational amplifier and a capacitor connected between the inverting input terminal and an output terminal of the operational amplifier; and a digital conversion unit for converting the output signal integrated by the integration unit into a digital signal.

The invention discloses an auxiliary imaging system and an automatic control method for a reduction furnace. The auxiliary imaging system comprises an infrared monitoring probe and an analog-to-digital converter chip, wherein the infrared monitoring probe comprises a CCD camera; the infrared monitoring probe is fixed at a reduction furnace sight glass; when light at the reduction furnace sight glass is focused into an image through a lens of the CCD camera, the CCD camera can convert the light of the image into a charge parameter, convert the charge parameter into a digital signal through theanalog-to-digital converter chip, and convert the digital signal into a digital image through compression storage; and the system processes the digital image to obtain control parameters.

The invention provides a testing device, a method and a system, wherein the method includes: loading detection signals, and the detection signals comprises analog signals, digital signals, speed pulse signals and fault feedback signals; sending the detection signals to a traction control unit, receiving pulse signals and detection result signals, and the pulse signals and the detection result signals are sent by the traction control unit; confirming whether stoppages exist in the traction control unit or not according to the pulse signals and the detection result signals. The existing problem that a test to the traction control unit of an electric locomotive cannot be achieved quickly and effectively in the prior art is solved.

The embodiment of the invention discloses a fingerprint processing device, which comprises a protection layer, an adhesive, a fingerprint collection chip, a collector, a bucking circuit 1, a PGA 1, a bucking circuit 2, a PGA 2, an ADC and a control chip, wherein the collector is used for amplifying and converting capacitance signals of a fingerprint capacitor Cf to reduce noise influences from a subsequent circuit; the bucking circuit 1 is used for carrying out secondary precise bucking on offset noise; the PGA 1 is used for amplifying output signals of the bucking circuit 1 and inputting the amplified signals to the bucking circuit 2, and the PGA 1 adopts high gains to reduce design requirements of the subsequent circuit; the bucking circuit 2 is used for carrying out secondary precise bucking on the offset noise; the PGA 2 is used for properly adjusting the signal amplitude; the ADC is used for outputting digital signals to the control chip; and the control chip is used for carrying out feedback control based on the digital signals. According to the embodiment of the invention, the resolution of signals of a valley and a ridge of a user finger is improved when the user fingerprint is collected, and the offset noise generated during the signal processing process is bucked.

Disclosed herein is ultrasonic scanning apparatus and method for diagnosing a bladder. The ultrasonic scanning apparatus includes a transducer, a transducer support, an analog signal processing unit, a display unit, a central control unit, a first stepping motor, a second stepping motor, and a drive control unit. The transducer emits ultrasonic signals for respective scan lines and receives ultrasonic signals reflected from an object. The transducer support configured such that the transducer is fixedly installed therein. The analog signal processing unit converts the ultrasonic signals into digital signals. The display unit outputs specific image signals. The central control unit performs image processing on the digital ultrasonic signals, outputs the results of the processing to the display unit, and controls the overall operation of the apparatus. The first stepping motor rotates in a first direction. The second stepping motor rotates in a second direction. The drive control unit controls the operation of the first and second stepping motors in response to drive control signals provided from the central control unit.

The invention provides a directional modulation signal design method based on spatial Fourier transformation. The method comprises the following steps of establishing desired phase wave beam spatial coverage functions in ideal conditions relative to different communication models; and acquiring a phased array element weighted value according to the spatial Fourier transformation pair relation among phase wave beams and the array element weighted value of a phased array in a directional modulation signal transmitter to achieve a directional modulation signal design in different communication models. By using the directional modulation signals designed by the method, valid users can normally demodulate received directional modulation signals through common digital signal receivers. As to wiretappers in undesirable directions, their wiretapping receivers cannot demodulate useful communication information from received signals due to the relative phase relationship distortion of constellation points in a received signal constellation diagram. The invention provides a safe transmission method for transmitting communication information in wireless channels.

A relaying method performed by a half-duplex relay for a telecommunications system includes a reception stage of receiving codewords from sources during N uses of the transmission channel. The successive codewords correspond to B blocks, the first of which can be decoded independently of the other blocks. This stage includes a decoding step of estimating a message from each source based on received codewords. The relay performs an error detection and decision-taking step on messages decoded without error. The relay performs a stage of encoding a signal and forwarding it to a destination. The signal is representative of only messages decoded without error and includes channel encoding by an incremental redundancy code to obtain a channel encoded codeword. The relay passes from non-selective reception to selective reception after receiving B1 blocks and switches from the reception stage to the encoding and forwarding stage under control of the decision step.

The invention discloses an intelligent LED illuminating control system and a control method thereof. The intelligent LED illuminating control system comprises an intelligent control panel and an intelligent LED lamp. The intelligent control panel serves as a centralized controller and can receive an instruction sent by a mobile terminal through a WIFI circuit, and the instruction is processed through a processor so that an instruction signal can be modulated on an alternating current power line; when the LED lamp is connected to an alternating current power supply line, instruction information is extracted through a detecting circuit in the intelligent LED lamp, an LED driver is controlled after the instruction information is processed, and control over adjustment of the LED lamp is finished. The principle of carrying out digital signal modulation through the power line is utilized for finishing communication between the intelligent control panel and the intelligent LED lamp, additional communication cables are not needed to be arranged, and therefore the control system is economical, practical and capable of being applied to control over other intelligent home appliance.