26 results about "Analog signal" patented technology

A circuit for converting an analog signal to a discrete pulse-width-modulated (PWM) signal uses a delta-sigma amplifier and a discrete PWM stage to produce a discrete PWM output signal having lower in-band signal noise then a PDM system and a lower signal distortion then a continuous PWM system. A multiple bit quantization stage drives the discrete PWM stage.

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.

An opto-electronic converter includes a plurality of light-receiving elements configured to convert light of different colors into analog signals, each of the analog signals representing a pixel, an amplifier unit configured to amplify the analog signals, into which the light is converted by the light-receiving elements, in each pixel group, the pixel group including a plurality of the light-receiving elements, the plurality of light-receiving elements converting light of different colors, and a gain switch unit configured to switch, for each of the light-receiving elements included in the pixel group, a gain of the amplifier unit to a gain determined in advance depending on a color of the light converted by the light-receiving element.

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 provides an automobile panoramic imaging device and method based on infrared calibration. The device comprises multiple camera shooting acquisition units arranged in different directions around an automobile, a video conversion unit, a video processing unit, a storage unit, a video coding and outputting unit, a display unit and infrared lasers respectively fixed on the multiple camera shooting acquisition units, wherein the camera shooting acquisition units shoot colorful image information in different directions around the automobile; the video conversion unit converts analog signal image information shot by each camera shooting acquisition unit into binary digital image information; the digital image information is stored in the storage unit; and the video processing unit analyzes and processes the information of multiple digital images in the storage unit by virtue of an infrared calibration line emitted from an infrared emitter. According to the automobile panoramic imaging device and method based on infrared calibration, the panoramic information of the automobile and the surrounding environment can be accurately provided for drivers in real time.

This invention discloses an automatic calibration system and method for analog signal measurement apparatus, which comprises the following: PC machine used to control the calibration process of analog signal measurement apparatus; control card connected with PC machine and used to receive group information and perform the control order sent by the PC machine and to send back the sample value and standard value to PC machine; communication card connected with control card and used to a communication connection between control card and analog signal measuring apparatus; responding signal source output apparatus to the analog signal measuring apparatus separately connected with communication card and analog signal measuring apparatus and used to generate standard value and send the signal to the analog signal measuring apparatus to get relevant sample value according to the group information.

A return path system includes inserting RF packets between regular upstream data packets, where the data packets are generated by communication devices such as a computer or internet telephone. The RF packets can be derived from analog RF signals that are produced by legacy video service terminals. In this way, the present invention can provide an RF return path for legacy terminals that shares a return path for regular data packets in an optical network architecture. The invention operates independently of a legacy upstream transmission timing scheme so that the legacy upstream transmission timing scheme can remain effective in preventing data collisions. In other embodiments, the present invention allows for less complex hardware for subscribers that are not taking data services. Further, an optical signal present line in combination with a driver may be employed in order to reduce the amount of hardware in a laser transceiver node.

For testing an RF device, such as an RF receiver/decoder chip that receives an RF signal via an antenna terminal and outputs a digital code at an output terminal, an inexpensive non-RF programmable tester is used. The programmable tester is a commercially available tester that need only generate and receive non-RF digital and analog signals. The RF signals needed for the testing of the RF device are totally supplied by RF generators on a single printed circuit board, external to the commercial tester housing. The board contains controllable RF generating circuitry whose possible output amplitudes and frequencies need be only those necessary for testing the particular DUT. The frequencies may be changed by switching in different crystal resonators mounted on the board.

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 invention relates to a device used for measuring the temperature in a high-pressure gas cylinder during filling and discharging of the high-pressure gas cylinder. The device used for measuring the temperature in the high-pressure gas cylinder can be used for directly and accurately detecting and recording the temperatures of multiple points distributed in the high-pressure gas cylinder and is precise in structure and simple and convenient to install. The device comprises a point distribution mechanism, a sealing module and a data acquisition card, the point distribution mechanism comprises a conduit provided with multi-connecting rods, each multi-connecting rod is provided with a positioning spring in a matched mode, each positioning spring is used for adjusting the angle of the corresponding multi-connecting rod, and each multi-connecting rod is connected with a temperature sensor; the sealing module comprises a high-pressure shield, a lead tube base sleeve, a signal lead tube and a gas cylinder connector, and a penetrating hole is formed in the gas cylinder connector; the data acquisition card is used for converting analog signals collected by the temperature sensors into temperature data for storage; leads of the temperature sensors penetrate through the penetrating hole, pass through the signal lead tube, the lead tube base sleeve and the high-pressure shield and then are led to the data acquisition card.

The invention discloses an online self-learning measurement device for an internal resistance of a lithium battery and a measure method thereof. The measurement device comprises a lithium battery body, and further comprises a current sensor for detecting a current signal of the lithium battery body; an electricity sensor for detecting and calculating current electricity of the lithium battery body; a temperature sensor for detecting temperature of the surface of the lithium battery body; a cycle counter for calculating the cycle numbers of the lithium battery body that has been used; a controller for calculating a current internal resistance of the lithium battery body with the current signal parameter, the current electricity parameter, the temperature parameter, the voltage signal parameter and the cycle numbers; a voltage controller for converting a terminal voltage analog signal of the lithium battery body into a digital signal; a correction load for online learning and correctionof the internal resistance measurement device. The online self-learning measurement device for internal resistance of lithium battery can combine offline detection, calibration and online self-learning correction for remaining use time of the lithium battery and has the characteristics of good robustness, high precision and online self-adaptation.

The invention discloses a remote positioning LNG liquidometer which comprises a liquid level display, a liquid level transmitter, a liquid level sensor, a pressure sensor, a temperature sensor, a CPU processor and a GPS module, wherein the CPU processor is installed on a circuit board in the liquid level transmitter, the circuit board is also provided with a pressure sensor interface, a temperature sensor interface, an analog signal output interface, a CAN communication interface and a GPS module output interface, which are connected with the CPU processor, and the liquid level transmitter comprises a first transmitter and a second transmitter, and which are respectively connected with the pressure sensor and a capacitance sensor. The structure design is simple, and the remote positioning LNG liquidometer can directly simulate voltage output to directly connect with an oil meter dial of an automobile. Visual display is facilitated, and low temperature display is realized. The remote positioning LNG liquidometer is more convenient to user, and higher in metering precision. Measuring values of LNG and geographic coordinate values are sent to an Internet of things platform through a GPS module and the Internet of things platform to realize smart Internet of things effect.

The invention discloses an all-optical sampler, comprising a continuous laser which is used for generating continuous signal light; an optical modulator which is driven by a radio frequency signal and is used for modulating an analog radio frequency signal through combination with the signal light, thereby generating continuous analog signal light; a polarization controller which is used for controlling a polarization state of the analog signal light; a first coupler which is used for allocating the low-power analog signal light into two ways of light according to a proportion; a Mach-Zehnder interferometer, wherein a first interference arm and a second interference arm of the Mach-Zehnder interferometer are used for receiving the two ways of analog signal light allocated by the first coupler; and a second coupler which is used for receiving the analog signal light output by the Mach-Zehnder inter-ferometer, coupling the analog signal light and then outputting sample signal light. According to the all-optical sampler, through utilization of cross-phase modulation effect of pump light for the analog signal light, the phase difference of the signals on the two interference arms is changed, so transmittance of the signals is changed; when the pump light exists, the signals are transmitted; and when the pump light does not exist, the signal transmittance is 0, thereby sampling the signals.

The invention discloses a multipath data acquisition system, comprising a plurality of sensors, a plurality of amplifiers, multiple paths of analog switches, a sampling maintaining module, an A/D converter, a pre-processing unit, and an industrial personal computer; each sensor is connected to the corresponding amplifier; the amplifiers are connected to the multiple paths of analog switches; the multiple paths of analog switches are connected to the sampling maintaining module which is connected to the A/D converter; the A/D converter is connected to the pre-processing unit; and the pre-processing unit transmits data to the industrial personal computer. The multichannel synchronization data acquisition system can collect signals of various channels at the same moment and has high data collection efficiency. The arrangement of the sampling maintaining module guarantees that the digital signal converted through the A/D converter can accurately reflect the original simulation signal.

The invention discloses a vehicle function test method, device and equipment and a computer readable storage medium, and belongs to the technical field of Internet of Vehicles. The method comprises the following steps: acquiring a first analog signal for testing a target function of a vehicle; converting the first analog signal into a first CAN signal under a controller area network CAN protocol used by the vehicle; sending the first CAN signal to a controller corresponding to the target function in the vehicle, wherein the first CAN signal is used for indicating the controller to perform a corresponding action; and receiving a second CAN signal fed back by the controller after executing a corresponding action based on the first CAN signal, and converting the second CAN signal into a second analog signal which is used for determining a test result of the target function. According to the mode, when the vehicle using different CAN protocols is tested, the test of the vehicle function and the determination of the test result can be completed according to the analog signal, and the efficiency of testing the vehicle function is improved.

The invention discloses a digital chromatographic system which is composed of a central control unit, a communication module, a digital conversion module and a chromatographic device. The chromatographic device is a full-automatic purification system, the chromatographic device comprises a UV detector, a membrane pump, a pressure detector, a flow detector, a pH and Conductivity detector, a liquidlevel detector and an automatic valve; the system is provided with an RS485 communication module, an RS232 module and a ProfibusDP remote module; the communication module is direct in digital communication with an instrument and reads or writes in related numerical values; the digital conversion module converts on-site common analog signals into digital signals and transmits the digital signals into a control unit through the digital communication technology; the control unit and the instrument are subjected to full-digital communication control, after digital communication is introduced, analog signal attenuation, analog signal interference, installing circuit complexity and other problems in the prior art are solved, and water solutions and solutions with large viscosity can be effectively distinguished through an IOLink sensor.

The invention discloses an acquisition execution device, and the device comprises a power supply module, a CPU module, a DSP module, an analog signal acquisition module, an alternating current input module, an input module and an output module. The DSP module is in communication connection with the CPU module, and the analog signal acquisition module, the AC input module, the input module and the output module are respectively in communication connection with the CPU module. The power supply module is electrically connected with the CPU module, the DSP module, the analog signal acquisition module, the AC input module, the input module and the output module. Aiming at the acquisition control requirements of automatic equipment, the system has the functions of analog sampling, small signal acquisition, switching value acquisition and GOOSE receiving remote control and locking; meanwhile, the acquisition execution device is installed close to primary equipment, on-site cable wiring is shortened and simplified, the number of cables used between the primary equipment and the secondary equipment is greatly reduced, and the acquisition execution device is connected with automation equipment in an optical fiber mode.

The invention relates to an electric field change measurement device and method, and the device comprises an outdoor sensing part, a transmission line, and an indoor part. The outdoor sensing part is not provided with a circuit, and does not need power supply. An analog signal is directly transmitted to the indoor part for collection and filtering through the transmission line, and a final electric field change digital signal is obtained. The invention also discloses a design method for a filter cooperating with the electric field change measurement device. Through the design steps, the filter can be implemented through a classic analog or digital filter method. The device simplifies the measurement structure, improves the reliability, and can be widely used for electric field change measurement of thunder and other occasions.

A communication method provided by the invention is a point-to-point communication method having a low data transfer rate, and transmits information, commands and configurations of electronic equipment provided with a light receiver by modulating light emitted by a flashlight of a handheld device having processing capabilities. The launch operation is handled by an application installed in a handheld device, such as a smartphone, tablet, or the like. The receiving operation is processed by the electronic equipment to be configured. The transmitting equipment exists in a handheld device, and the handheld device is provided with an application program and a flash lamp. The receiving device is installed in an electronic device to be configured. And the electronic equipment consists of a powersupply (A), a luminosity sensor (B) for monitoring the change of luminosity emitted by the flashlight (F) of the handheld device regardless of the environment, an analog-to-digital converter (C) forconverting an analog signal from the luminosity sensor into a digital signal, a microcontroller (D) for receiving firmware and processing the digital signal, and an electronic equipment or load control device (E) to be adjusted.

The invention relates to a wired channel information connecting device. The wired channel information connecting device comprises a wired communication unit, a digital information processing unit, an interface unit and a power supply unit, wherein the digital information processing unit is respectively connected with the wired communication unit, the interface unit and the power supply unit, and the digital signal processing function of the digital information processing unit is realized by use of an FPGA chip. The method for realizing connection comprises the following steps: A), receiving and determining data in a specific format, sent by a host computer from the network port or the serial port of the wired channel information connecting device; B), the wired channel information connecting device internally performing processing such as data extraction, data encoding, encryption, framing and like on the effective data sent by the host computer, and then sending the data to the wired communication unit; and C), the wired communication unit modulating received digital signals and then sending simulation signals to a wired channel. The advantages are as follows: by simulating the wired channel, the connection problem of a wired terminal device is solved, and data exchange and state control of the wired terminal device by the host computer are realized.

The demodulating apparatus includes circuits of receiving modulated radio signals coming from a plurality of transmission devices, first demodulating a first reception signal DPSK-modulated among the radio signals, modulating demodulation signals into modulation signals based on DPSK, estimating an amplitude and a phase of a propagation signal on a propagation path leading to the reception circuit from the transmission device on the basis of the radio signal and the modulation signal, first generating, based on the variables, a first simulated signal simulating the first reception signal from the modulation signal, extracting a signal obtained by cancelling the first simulated signal from the radio signals, and repeating processes of the first demodulating, the modulating, the estimating, the first generating and the extracting to such a limit as to enable the first demodulating.