176 results about "Digital analog" patented technology

The invention relates to the technical field of satellite communication, in particular to a high-orbit and low-orbit satellite communication resource scheduling method and system, which collects real-time state information of high-orbit and low-orbit satellites, performs digital simulation of a satellite network based on the real-time information, constructs a satellite network management model and predicts satellite trajectory change. The method comprises the following steps: performing multi-dimensional evaluation on a satellite network management model by using a pre-constructed network evaluation framework, generating cross-orbit link evaluation information, analyzing parameters such as link quality and bandwidth, obtaining current service demand information, analyzing a communication resource allocation strategy in combination with a cross-orbit link evaluation result, and formulating a resource scheduling strategy according to strategy analysis. And a high-orbit and low-orbit satellite communication network is constructed through execution of a hierarchical network management mechanism and a cross-orbit data transmission protocol.

The invention provides a digital twinborn medical education training method and system. The method comprises the following steps: generating case information and scoring rules of AI digital patients based on clinical real cases; constructing a physical training environment which comprises a training model, an environment construction object and an operation sensing device; creating a digital training environment mapped with the physical training environment in real time, wherein the digital training environment comprises an AI digital dummy and an interactive operation process; responding to operation input of the trainee in the physical training environment or the digital training environment; through a server synchronization engine, real-time bidirectional interaction between entity operation of the physical training environment and virtual operation of the digital training environment is realized; and dynamically collecting cross-environment operation data, and generating a clinical ability evaluation report based on case information and scoring rules. The method has the beneficial effects that a medical education evaluation-diagnosis-treatment full operation chain is deeply fused, the clinical practice ability is remarkably improved, and medical risks are effectively prevented and controlled.

The invention relates to a square wave generation method and system based on a DDS signal transmitter, and belongs to the technical field of digital electronic signal synthesis. The method comprises the following steps: calculating a digital analog signal sampling frequency based on a square wave output frequency set by a user, and obtaining a digital fundamental frequency phase signal according to a phase-locked loop precision range; mapping the digital fundamental frequency phase signal into a sinusoidal amplitude signal according to a digital phase accumulation mechanism to obtain a digital-analog conversion clock, binarizing the sinusoidal amplitude signal, and outputting a square wave output period; dividing a square wave output period into a low level region and a high level region according to the precision range of the phase-locked loop, reading a square wave output frequency set by a user through a random storage address, and outputting a non-offset phase-locked square wave; and constructing an error accumulation self-checking architecture to calculate a frequency control word, and when detecting that the frequency control word has a decimal discarding error, recalculating the frequency control word.

Techniques and apparatus for determining dynamic current mismatches in a current-steering digital-to-analog converter (DAC) are provided. One example technique generally includes accumulating current mismatches between a DAC cell of a plurality of DAC cells and a reference cell using a capacitive element and changing a polarity of the capacitive element during the accumulating. The timing of the accumulating may be controlled such that a static current mismatch between the DAC cell and the reference cell is at least reduced and a dynamic current mismatch between the DAC cell and the reference cell is enhanced.

The invention relates to the technical field of printing control, and discloses an intelligent printing job scheduling method and device and a storage medium, and the method comprises the steps: obtaining the production process, performance and layout information of each job unit, carrying out the digital simulation based on the information, building a basic and deep digital model, collecting task target data, and simulating a job scheduling scheme. The method comprises the steps of obtaining equipment load information, analyzing logistics evaluation information of different scheduling schemes, evaluating each scheduling plan, selecting an optimal scheme, issuing a job scheduling strategy, tracking the equipment load in real time and adjusting a job scheduling plan, and the method optimizes job scheduling through digital simulation, prediction and evaluation, effectively improves the production efficiency, reduces the fluctuation of the equipment load, and improves the working efficiency. The flexibility and stability of a production line are enhanced, and the problem that in the prior art, the efficiency is poor due to the fact that printing process plans are controlled through artificial experience is solved.

The invention relates to the technical field of optical fiber wireless communication and mobile forward transmission, in particular to a digital analog optical fiber wireless forward transmission transmitting end parameter self-adaptive optimization method and system based on reinforcement learning. Decomposing the normalized wireless signal into digital parts of all levels and a final analog residual error part through multi-level modulation, and transmitting the digital parts and the final analog residual error part in a time division multiplexing manner; a receiving end represents inter-symbol interference caused by link nonlinear distortion and bandwidth limitation, and the signal-to-noise ratio of a recovery signal is calculated based on the error vector amplitude. Parameters of a transmitting end are optimized and modeled into a Markov decision process, states comprise rounding factors, scaling factors, constellation forming factors and pre-equalization filter tap coefficients of all levels, and actions are discrete increments of the parameters; a reinforcement learning agent is constructed by using a dual deep action value network, and training is updated in combination with experience playback and a target network. The reward function comprises a threshold satisfaction item and a signal-to-noise ratio change item; parameters are interactively updated in the training stage, and online self-adaptive adjustment is performed in the reasoning stage.

The invention belongs to the technical field of computing power network scheduling, and particularly relates to an intelligent computing power network scheduling system based on digital simulation. Comprising an agent knowledge support module, a multi-agent self-organizing interaction module, a trend evolution simulation module and a macroscopic regulation and control evaluation optimization module. The agent knowledge support module provides support for dynamic evolution of the agent by constructing a multi-level and structured knowledge fusion system; the multi-agent self-organizing interaction module realizes distributed collaborative decision based on a reinforcement learning framework and a game equilibrium theory; the trend evolution simulation module is responsible for performing accurate prediction and risk assessment on the future state of the computing power network; the macroscopic regulation and control evaluation optimization module automatically searches an optimal policy combination based on a multi-objective optimization algorithm and provides data support for a decision maker; the system modules cooperate with each other to form a data-driven closed-loop feedback updating mechanism. The resource waste is reduced, and the scheduling efficiency is improved.

The invention discloses a seamless range switching system and a seamless range switching method for instrument current measurement. The seamless range switching system comprises a digital-to-analog converter, an error amplifier, a first driving circuit, a first current measurement circuit, a clamping circuit, a second driving circuit, a second current measurement circuit, two analog-to-digital converters and a field programmable gate array. The first current measuring circuit converts 10 [mu] A to 30 mA low current into a first voltage signal to form a negative feedback closed loop. When the first voltage signal reaches a Zener breakdown threshold value, the clamping circuit outputs a trigger signal to start the second driving circuit, so that the two driving circuits jointly provide a total current of 30mA to 500mA for the load; the two analog-to-digital converters perform synchronous sampling, and the field programmable gate array selects digital signal output which is in a linear measurement range and has an error not exceeding + / -0.05% of a full scale. No mechanical switch exists in the switching process, the current is uninterrupted, and wide-range high-precision continuous measurement is achieved.

The invention discloses a magnetic axis keyboard Hall sensor array reading circuit and a reading method. The device comprises a Hall sensor array, a controllable power supply array, a control module, two 1-out-of-N selectors, an analog comparator, a digital comparator, an analog-to-digital converter and a digital-to-analog converter. The power supply end of each Hall sensor is connected with the output end of the corresponding controllable power supply, and signals input by the high-voltage enabling end and the low-voltage enabling end of each controllable power supply are not high levels at the same time. A mobile threshold register and a trigger threshold register are arranged in the control module, output ends of the N Hall sensors are respectively connected with corresponding input ends of the two one-out-of-N selectors, and the two one-out-of-N selectors are respectively connected with the mobile threshold register and the trigger threshold register through the analog comparator and the digital comparator. According to the invention, adaptive frequency modulation and voltage regulation can be carried out, the working current of the Hall sensor array is greatly reduced, the working time of the magnetic axis keyboard is prolonged, and the key delay is reduced.

The utility model provides a light compensating circuit and a pulse blood oxygen simulation system, which relates to the technical field of blood oxygen detection and comprises an ambient light detection circuit, an ambient light simulation generation circuit and a compensation superposition circuit. The ambient light detection circuit comprises a light sensor, a first operational amplifier, a first resistor and a microprocessor; the optical sensor is connected with the inverted input end of the first operational amplifier, the inverted input end of the first operational amplifier is connected with the output end of the first operational amplifier through the first resistor, and the output end of the first operational amplifier is connected with the input end of a digital analog converter port of the microprocessor. The output end of the digital analog converter port of the microprocessor is connected with the first input end of the compensation superposed circuit, and the output end of the ambient light analog generation circuit is connected with the second input end of the compensation superposed circuit. Therefore, the resistance of the system to ambient light interference is effectively improved.

The utility model relates to an optical communication coupling module. The optical communication coupling module comprises at least one photodiode, an analog-to-digital converter, and a variable resistor or a digital-to-analog converter. The photodiode is used for detecting the quantity of laser light; an analog-to-digital converter connected to the photodiode; the variable resistor is connected to the photodiode, and the digital-to-analog converter is connected to the analog-to-digital converter; according to a comparison result of an input voltage of the photodiode and a threshold voltage, a resistance value of the variable resistor is adjusted, or a reference voltage of the analog-to-digital converter is adjusted, so that whether the analog-to-digital converter is started or not is determined, and the analog-to-digital converter is in a dynamic range.

Provided is a hybrid ADC capable of suppressing the influence of misdetermination of quantization and improving linear characteristics. The hybrid ADC includes: a first switch connected to an input terminal to which an analog signal is input; a delay integrator connected to an output side of the first switch; a quantizer connected to an output side of the delay integrator; a digital-to-analog converter for analog-converting the output of the quantizer; and a first adder that is provided between the first switch and the delay integrator and adds the analog signal input to the first switch and an inverted output obtained by inverting the sign of the output of the digital-to-analog converter, in a first step, the first switch is turned on, the quantizer quantizes in two levels, and in a second step, the quantizer quantizes in two levels. And a second step in which the first switch is turned off, the quantizer quantizes at a level 3 according to the output of the delay integrator in the first step, and the digital-to-analog converter performs analog conversion at a level 2, and the second step in which the first switch is turned off, and the quantizer quantizes at a level 3 according to the output of the delay integrator in the first step, and the digital-to-analog converter performs analog conversion at a level 3.

The utility model discloses a USB high-fidelity decoder with a vibration unit, which comprises an integrated board. According to the utility model, the USB assembly, the system control assembly, the Bluetooth assembly, the first motor assembly, the first vibration driving assembly, the audio signal processor assembly, the loudspeaker assembly, the second motor assembly, the second vibration driving assembly, the earphone assembly and the high-fidelity digital-to-analog conversion assembly are integrated in the integrated board, so that the integrated board forms an integral module; the module can be attached to the surface of an object such as a mobile phone and can also be embedded into a mobile phone shell, the design that sound is experienced through the touch sense of the human body is achieved, a user can feel the sound in multiple dimensions on the basis of traditional auditory sense, the overall experience of entertainment equipment is enhanced, and meanwhile brand new understanding of music / sound is achieved.

1. The name of the design product: multi-mode fusion intelligent intercom panel (P11). 2. The use of the design product: the design product is an intercom device for intercom communication of public network, LTE private network, DMR digital and analog two-in-one, PDT digital and analog two-in-one, mesh ad hoc network, Beidou three-generation short message and Tian Tong satellite telephone and other communication technologies. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to the technical field of laser interference measurement, and discloses a very long baseline laser interference ground time delay simulation method, which comprises the following steps of: outputting a laser beam through a laser to form an interference signal through unequal arm interference, and measuring and acquiring real-time change data of laser frequency by using a phase meter; storing the data, performing multi-path delay processing, converting the data into a voltage signal through digital-to-analog conversion, and modulating the voltage signal back to a laser beam through an acousto-optic modulator; and finally, performing beam splitting and beam combining interference on the laser beams subjected to different delay modulation to obtain an interference signal simulating very long baseline time delay, and analyzing delay information by a phase meter. The device comprises a laser, an unequal arm interference assembly, a phase meter, a digital analog converter, an acoustic optical modulator group, a beam splitting and combining assembly and a detection assembly. The method does not need to depend on an ultra-long distance physical baseline, and precise simulation of very long baseline time delay is realized through real-time measurement of frequency noise, delay modulation and interference feedback.

The invention provides a vehicle-mounted controller partition PCB layout and system for suppressing electromagnetic interference, and relates to the field of PCB layout, and the method comprises the steps: dividing a controller into a high-speed digital domain, an analog sampling domain, a radio frequency communication domain, a power conversion domain and the like in a design stage, and analyzing the backflow path and noise characteristics of the controller; generating a verifiable pseudo-random ground copper topology according to the unique identification information so as to destroy a periodic resonance condition and keep low-frequency backflow continuous; polarization channel mapping is established through a directional via array and an in-layer conductor so as to realize spatial polarization isolation; after manufacturing, performing impedance spectrum, reference voltage and polarization distribution detection to confirm the electromagnetic performance; the design seeds and detection data of the qualified board are written into a traceability database to support reproducible production; during assembly, the segmented cover bodies are pressed in the polarization direction to form multi-stage shielding.

The application discloses an aviation equipment PHM virtual-real integration experiment platform and an experiment method, and belongs to the technical field of aircrafts. The platform comprises a component-level PHM physical experiment module configured to realize PHM physical experiments of important components of an airplane and collect test data, and a whole-machine-level PHM virtual simulation experiment module configured to acquire the test data of the component-level PHM physical experiment module and perform digital simulation on the whole airplane and a scene; corresponding PHM faults can be injected in the simulation process. The method comprises a physical platform experiment process, a digital simulation experiment process and a virtual-real integration experiment process. The application can solve the technical problems of single PHM research level, insufficient virtual-real combination capability and limited verification conditions in the prior art, and realizes multi-level PHM research and verification from the component level to the whole-machine level.

The invention relates to the technical field of laser control circuit design, in particular to a multifunctional laser control device and method.The multifunctional laser control device comprises a main control board, a signal isolation module used for enhancing information stability is arranged on one side of the middle of the upper surface of the main control board, and a digital-analog information conversion module is arranged on the other side of the middle of the upper surface of the main control board; according to the multifunctional laser control device, an integrated control method and a single-chip microcomputer technology are utilized, a human-computer interaction interface can be unified upwards, laser control can be unified downwards, customized operation of laser welding and laser cutting in different application scenes is greatly reduced, and data stability of a control system matched with the multifunctional laser control device can be improved through direct connection between plates.

The invention discloses a high-fidelity rapid ion transport device. The device comprises an upper computer module, an FPGA data processing module, a digital-analog voltage conversion module, a voltage amplification module, a low-pass filtering module and an ion trap module which are connected in sequence, the invention also discloses a voltage optimization method for high-fidelity rapid ion transport, the speed of ion movement is controlled through a sin2 function, and the method provided by the invention calculates the optimal voltage value of each transport electrode under the transport track of ions through a quadratic programming algorithm; the moving process of ions has the characteristics of slow start, constant-speed middle section and slow stop, and the smooth movement can effectively avoid excitation of a motion mode and reduce the heating effect; the optimal voltage value of each transport electrode avoids additional heating, improves the efficiency of quantum calculation, and meets the high fidelity requirement of the ion logic gate.

Method in an electrical audio signaling circuit comprising a feedback loop (280) with a digital filter (285) coupled to a current-to-digital-to-analog converter (240, 320), the method comprising: providing (560, 625) an output signal from the current-to-digital-to-analog converter (240, 320) to analog elements of the electrical audio signaling circuit, wherein the output signal from the current-to-digital-to-analog converter (240, 320) is based on a reference signal input to the current-to-digital-to-analog converter (240, 320) while no output from the digital filter (285) is input to the current-to-digital-to-analog converter (240, 320); comparing (565, 630) an output signal of the electrical audio signaling circuit with a reference; and calibrating (570, 635) the electrical audio signal circuit, such that the output signal of the electrical audio signal circuit corresponds to the reference,wherein the calibration of the electrical audio signal circuit enables more precise control of a cutoff frequency of a microphone signal, while the output of the digital filter (285) is input into the current-to-digital-to-analog converter (240, 320).

A computer system and method for simulating one or more anatomical features of a simulated patient for application with a simulated medical scanning procedure. A medical scanning procedure by a medical scanning device is digitally simulated on a user selected simulated patient, wherein the user defines one or more anatomical features associated with the user selected patient. A computer display is generated enabling user selection of a certain simulated patient, including user selection of one or more anatomical features associated with the user selected simulated patient, for medical scanning simulation with a simulated medical scanning device. Simulation further includes digital simulation of injection of dye material into the simulated patient for application with a simulated medical scan requiring use of dye material.

The invention discloses a high-speed frequency hopping signal tracking interference method based on a receiving and transmitting integrated platform, and belongs to the technical field of communication countermeasure. Comprising the following steps: acquiring a broadband radio frequency signal, moving the acquired signal to a zero intermediate frequency state to form baseband data in an effective bandwidth, and performing sampling rate reduction processing; carrying out real-time fast Fourier transform on the baseband data after the downsampling rate processing to obtain transformed spectrum data; analyzing a frequency hopping signal in the converted frequency spectrum data to obtain a frequency hopping rate and a frequency hopping pattern of the frequency hopping signal, and respectively presenting the frequency hopping rate and the frequency hopping pattern as a frequency modulation period and a frequency hopping frequency table; inherent signals in the electromagnetic space and interference signals released by the platform are eliminated in a frame-by-frame difference comparison mode, and a channel number corresponding to a frequency hopping frequency is obtained by comparing a frequency hopping frequency table; and a noise modulation signal is generated based on the frequency channel number, digital-to-analog conversion is realized through a digital-to-analog converter, interference signal output is formed, and tracking interference output of the signal is completed.

The utility model relates to the technical field of electronic circuits, and discloses a voltage feedback control circuit based on DAC high-precision digital-to-analog conversion, comprising a DAC module; a voltage sampling module; a voltage feedback control loop; an operational amplifier module; a power supply module; the DAC module adopts a high-precision chip, errors in the digital-to-analog conversion process can be remarkably reduced, it is ensured that a generated analog voltage signal accurately reflects expected voltage, and therefore high-precision voltage feedback control is achieved; the voltage sampling module and the voltage feedback control loop work cooperatively, so that the voltage can be monitored and adjusted accurately in real time; the voltage deviation is quickly and effectively adjusted, so that the output voltage can be quickly stabilized in an expected range, and the problem of inaccurate voltage control of a traditional circuit is solved; precise feedback control of the voltage is realized by combining a plurality of functional modules, and the stability and accuracy of voltage output of the electronic equipment can be effectively improved.

A digital-to-analog conversion system and a digital-to-analog conversion method, the digital-to-analog conversion system comprising: a control code conversion circuit for converting a first N-bit control code into a first Y-bit control code according to a control code conversion table, Y being greater than or equal to N; and the DAC is used for receiving the first Y-bit control code and outputting a first DAC output voltage in a plurality of DAC output voltages, and the number of the DAC output voltages is smaller than or equal to 2N.

This invention relates to the field of cognitive testing techniques and sensor-based measurement systems to create a block design test-based cognitive ability and psychomotor profile assessment system that can be used in various age groups. This system integrates testing media in the form of physical blocks, digital simulations, or a combination of both, as well as a rotation sensor-based data acquisition module to record the orientation and movement of the blocks in real-time during the assembly process. The obtained rotation data is then processed to analyze the level of accuracy, speed, interaction patterns, and movement coordination that represent the user's cognitive abilities and psychomotor profile. Unlike conventional methods that rely on subjective observations by the examiner, this system is capable of conducting assessments objectively, measurably, and based on quantitative data.Furthermore, this system enables more efficient testing by storing results digitally for monitoring, evaluation, and research. This invention is intended to support a variety of applications, from monitoring cognitive development in children, evaluating cognitive performance in adults, to early detection of cognitive and psychomotor decline in the elderly.

The invention relates to the field of environment monitoring, in particular to an environment monitoring method and system based on a low-code platform, and the method comprises the steps: collecting observation data of a management region, carrying out the digital simulation of the management region based on the low-code platform according to the observation data, and obtaining a region simulation model; and performing simulation deployment of the environment monitoring network on the regional simulation model through the low-code platform to analyze deployment effect characteristics of the environment monitoring network, and performing feedback optimization on a deployment form of the environment monitoring network according to the deployment effect characteristics to obtain a regional monitoring deployment scheme.

The invention discloses a digital-analog hybrid signal modulation method based on a polar coordinate system, and the method comprises the following steps: S1, collecting a plurality of wireless signals, and aggregating the plurality of signals into one signal through a frequency division multiplexing mode; s2, respectively solving amplitude information and phase information of the aggregated signals; s3, calculating a polar coordinate system signal quantization codebook based on the amplitude information and the phase information; s4, performing quantization calculation on the aggregated signal based on a quantization codebook to obtain a digital part signal; s5, based on the digital part signal and the aggregated signal, obtaining an analog part signal through subtraction operation; s6, performing power regulation on the digital part signal and the analog part signal; and S7, aggregating the digital signal and the analog signal after power regulation into a final modulation output signal by adopting a time division multiplexing mode. The invention further discloses a digital-analog hybrid signal modulation method based on the polar coordinate system. The digital-analog hybrid signal modulation method comprises the inverse process of the modulation method.

The present disclosure relates to techniques for measuring slew rate in a current integrating phase interpolator. An apparatus is described that includes a current integrating phase interpolator core having a programmable bias current; an inverter circuit coupled to an output of the current integrating phase interpolator core for receiving a signal containing a periodic sawtooth waveform therefrom; a digital-to-analog (D / A) converter for setting an input common mode voltage of the inverter circuit; a duty cycle measurement (DCM) circuit for measuring a duty cycle distortion (DCD) of a clock signal output from the inverter circuit; and a circuit for calculating a difference between a first state of the DCD of the clock signal corresponding to the inverter circuit being set to a high voltage input common mode voltage and a second state of the DCD of the clock signal corresponding to the inverter circuit being set to a low voltage input common mode voltage.

The invention discloses a digital-to-analog converter output signal calibration method, a medium, a product and equipment, and relates to the technical field of integrated circuit testing. The method comprises the following steps: taking multiple groups of test excitation signals and actual simulation test signals as data points, and fitting original signal data to obtain initial fitting parameters and initial calibration test signals; according to a difference value between each actual simulation test signal and the corresponding initial calibration test signal, determining a corresponding weight for each data point according to a mode that the weight of each data point is inversely proportional to the corresponding difference value; and fitting the weighted data points again until a preset convergence condition is met, and storing a final fitting parameter and a weight value. And the DAC calibrates the received test excitation signal according to the fitting parameter and the weight value, and outputs the calibrated signal to the device to be tested. The problem that the DAC calibration requirement of a user cannot be met in the prior art can be solved, and the DAC calibration precision can be effectively improved.

The utility model discloses a battery test circuit and a battery charge and discharge data acquisition circuit. The battery test circuit comprises an analog-to-digital conversion circuit, one end of which is connected with a high-speed processing assembly circuit, and the other end of which is connected with a digital control circuit; one end of the digital-to-analog conversion circuit is connected with the high-speed processing assembly circuit, and the other end of the digital-to-analog conversion circuit is connected with the digital control circuit; one end of the bidirectional power output circuit is connected with the digital control circuit, and the other end is connected with the battery pack to be tested; the number of the bidirectional power output circuits is multiple, each bidirectional power output circuit comprises a bidirectional power output circuit, each bidirectional power output circuit comprises a high-power low-dropout P-type SiC MOSFET and a special-shaped high-power low-dropout N-type MOSFET symmetrical to the high-power low-dropout P-type SiC MOSFET in characteristic parameter, the high-power low-dropout N-type MOSFET serves as an upper tube, the high-power low-dropout N-type MOSFET serves as a lower tube, and the special-shaped high-power low-dropout N-type MOSFET serves as a lower tube. And the high-power low-dropout P-type SiC MOSFET serves as a lower tube. The utility model can solve the problem of large error of equipment output signals.