401 results about "Amplification factor" patented technology

The invention relates to the technical field of cable aging diagnosis, in particular to a cable aging diagnosis monitoring method and system. The method comprises the following steps: collecting cable multi-physical field data; establishing a time synchronization mechanism according to the cable multi-physical field data to obtain a multi-physical field signal data set; extracting eigenentropy value characteristics of each physical field according to the multi-physical field signal data set; constructing an entropy feature vector based on the eigenentropy feature of each physical field; defining a cable initial state reference entropy according to the entropy feature vector; and based on pre-acquired historical data and the entropy value feature vector, quantifying the aging catalytic effect under the synergistic effect of the temperature field and the partial discharge field, identifying the microcrack propagation effect generated by the combined effect of the mechanical strain and the temperature field, and constructing an entropy value synergistic amplification coefficient. According to the method, the cooperative amplification coefficient is established based on the entropy theory, and the influence of the multi-physical field interaction on the cable aging process is accurately quantified.

The invention relates to the technical field of radio frequency signal management, in particular to a radio frequency power supply output power amplification coefficient analysis method and system, and the method comprises the following steps: obtaining the input power, voltage and current parameters of a radio frequency power supply amplifier, calculating the average value of the power supply output power, and analyzing the change trend of the power in a load state. Determining the operation state of the amplifier, and establishing a power output data set. According to the method, the running state of the amplifier is adjusted and optimized in real time by continuously tracking the average value of power output and carrying out detailed analysis on different load states, in addition, accurate adjustment of the amplification coefficient is ensured by quantitatively analyzing the power loss and the fluctuation range, and therefore the amplification effect is optimized, and the reliability of the amplifier is improved. The energy efficiency and the response capability of equipment are remarkably improved, challenges in a complex operation environment are effectively dealt with through fine power stability analysis and dynamic adjustment of an amplification coefficient, and continuous stability and high efficiency of power output are ensured.

The invention discloses a cooperative control system and method for multi-process processing of a PCB (Printed Circuit Board). Multi-source process data of each process is collected, a process state baseline is formed through mutual verification of redundant sensors, process drift characteristics are examined and identified based on process capability, a process reference library is constructed in a layered manner by adopting a dynamic threshold value, and a generated process deviation parameter is detected; performing correlation analysis on adjacent processes to determine a transfer coupling degree, positioning a defect transfer link through bidirectional verification combining forward tracking and reverse backtracking, and cascading and accumulating process deviation parameters along the link to form a process incidence matrix; carrying out backtracking on defect diffusion to determine a sweep range, generating process state parameters according to the sweep range, and extracting trend turning characteristics to construct a process characteristic spectrum; defect amplification factors are extracted through sensitivity decoupling, process critical nodes are identified, a regulation and control rule base is constructed, process characteristic chromatograms are integrated, and process control instructions are output, so that defect source positioning and propagation path tracking are realized.

The invention relates to the technical field of water level online measurement, and discloses a water level measurement method and system based on ultrasonic waves. According to the invention, a variable time-sharing amplification circuit with a dynamic range is adopted, and the amplification times of echoes with different distances are automatically changed, so that the amplitude of an echo signal is kept to be more than five times of that of noise, and the influence of the noise on the measurement precision is effectively avoided; the method comprises the following steps of: receiving an echo signal, carrying out digital shaping on the echo signal according to a standard echo waveform near an echo peak value, and taking time corresponding to a waveform vertex after shaping as echo time, so that the influence of the measurement accuracy of echo waveform distortion is eliminated through the technology; meanwhile, the method that optimization is carried out after continuous three times of measurement is adopted, and the accidental phenomena of no echo and measurement value jumping can be effectively eliminated.

The invention relates to a fusion power supply harmonic suppression method based on an energy storage type STATCOM. The method comprises the following steps: determining a harmonic amplification factor K value; selecting and designing a proper discrete digital band-pass filter, and detecting a target frequency band and filtering characteristic sub-harmonics; the detected harmonic voltage amplitude and phase are used as references, an energy storage type STATCOM is adopted to output same-frequency and same-phase harmonic current, virtual damping is formed at a grid-connected point, a K value is used as a damping coefficient, the output harmonic current reference amplitude is determined, virtual harmonic damping is controlled, and harmonic resonance is suppressed. The virtual harmonic damping method for the energy storage type STATCOM is provided for accurate tracking of low-frequency harmonic and inter-harmonic voltage amplitudes and phases, the chain type STATCOM has the advantages of being high in high-voltage direct-hanging efficiency, high in redundancy fault-tolerant capability and the like and is suitable for high-voltage large-capacity scenes, virtual damping control achieves harmonic suppression by adjusting virtual damping at the harmonic frequency of a control structure, and the energy storage type STATCOM can be applied to high-voltage large-capacity scenes. And the system stability can be effectively improved while harmonic waves are treated.

The invention discloses an intelligent processing system and method for a magnetoelectric tachometric transducer, and relates to the technical field of engine control, the system comprises an electronic control unit, a signal acquisition circuit, an amplification circuit and a signal calculation circuit; the signal acquisition circuit is used for acquiring a voltage signal output by the magnetoelectric rotating speed sensor; the amplifying circuit is used for amplifying the voltage signal to obtain an amplified signal; the signal calculation circuit is used for calculating the rotating speed of the engine at the second moment according to the amplified signal; the amplifying circuit is used for amplifying the voltage and comprises a numerical control variable resistor; the resistance value of the numerical control variable resistor is controlled by the electronic control unit, the amplification factor is adjusted by adjusting the resistance value, when the rotating speed is low and the signal is weak, the signal amplification factor is large to ensure that the signal can be normally detected, and when the rotating speed is high and the signal is strong, the signal amplification factor is small to reduce the interference signal.

The invention discloses a cable cabling control method based on process big data, and belongs to the technical field of cable cabling control. Comprising the following steps that S1, parameters are collected in real time and preprocessed, historical batch records are called, the tension instability and the arrangement offset trend rate are calculated, simulation coupling factors are constructed, and an optimized coefficient combination is obtained; s2, the current tension instability and the arrangement offset change rate are calculated respectively, and the adjusted take-up speed and the adjusted twisting torque are obtained; according to the method, historical batch records of cables of the same specification are called, the tension instability and the arrangement offset trend rate are calculated, a numerical optimization algorithm is adopted to iteratively search an amplification coefficient and a sensitivity coefficient, a process-oriented optimization objective function is minimized, an optimized coefficient combination is obtained, and the stability of the cable tension is improved. Therefore, self-adaptive parameter optimization based on historical data is realized, the high adaptability of a control strategy to different batches of process fluctuations is improved, and the variability of quality indexes is remarkably reduced.

The invention relates to the technical field of integrated circuit design, in particular to a noise shaping assembly line successive approximation type analog-to-digital converter and a control method. Comprising a first stage including an auxiliary successive approximation analog-to-digital converter and a first stage voltage processing module; the second stage comprises a dual-channel noise shaping successive approximation type analog-to-digital converter and a loop filter; the input end of the residual amplifier is connected with the first-stage voltage processing module, and the output end of the residual amplifier is connected with the noise shaping successive approximation type analog-to-digital converter; the first input end of the digital code aligner is connected with the output end of the comparator of the auxiliary analog-to-digital converter, and the second input end of the digital code aligner is connected with the output end of the second-stage comparator. According to the invention, the analog-to-digital conversion speed can be accelerated, the influence of a zero point on a residual voltage amplification coefficient is reduced, the conversion time is shortened, and the input and output common-mode voltages of the time domain converter are stabilized.

The utility model relates to the technical field of satellite navigation, in particular to a satellite navigation anti-interference signal intensifier, which comprises a receiving antenna, a prefilter, a fixed amplification module and an automatic gain module which are sequentially connected, the output end of the fixed amplification module is further connected with a control module, and the control module comprises a peak value detection unit and a switch control unit. Two output ends of the switch control unit are connected with a control end of the automatic gain module, the peak detection unit is used for detecting a signal peak value, and the switch control unit controls the amplification factor of the automatic gain module based on the signal peak value output by the peak detection unit. According to the utility model, the prefilter is used for filtering interference signals, then the peak value detection unit is used for judging the magnitude of the signals, and then the switch control unit is used for selecting different resistors, so that the amplification factor of the automatic gain module is changed, the signals are enhanced, the final signals are in a proper range, subsequent signal processing is facilitated, and the practicability is higher.

The invention discloses a single-magnet-ring dual-processing-circuit switching wide-range leakage current sensor and method. A magnetic core works in a deep magnetic saturation state based on a magnetic modulation principle and is used for sensing a leakage current signal; the square wave self-oscillation circuit is used for sending a square wave signal to the coil by utilizing the inductance effect of the coil; each of the two signal processing circuits comprises a filter, a proportional amplifier and a lock-in amplifier, and only amplification factors of the proportional amplifiers are different, and the proportional amplifiers are used for processing induced leakage current signals; and the microprocessor is used for analyzing and processing the signal output by the signal processing circuit. The system can monitor the insulation state of the energy storage system in real time, effectively improves the safety and reliability of the system, and is suitable for photovoltaic power generation, wind power generation and other application scenes related to the energy storage system.

The invention provides a circuit for automatically adjusting magnification times and realizing synchronous sampling, and belongs to the technical field of power electronics. The circuit comprises an amplifying circuit, a resistance switching circuit, a phase locking circuit and an acquisition circuit, the amplifying circuit is used for receiving and processing an original signal, obtaining a voltage signal and analyzing an amplification factor required by the voltage signal, and an amplifier is correspondingly connected to a resistor in the resistance switching circuit according to the required amplification factor and is used for acquiring the voltage signal. And amplifying the voltage signal according to the amplification factor, receiving the amplified voltage signal by the phase-locked loop, analyzing the amplified voltage signal to obtain an average voltage, and adjusting the output frequency of the phase-locked loop according to the average voltage to lock the phase. And the acquisition circuit is used for synchronously sampling the amplified voltage signal according to the locked phase. In an electric power system data acquisition application, the amplification factor can be automatically adjusted, phase synchronization can be realized, and signal acquisition and data analysis of different capacitive devices of a power grid can be satisfied.

The invention provides an optical network communication method and device, and the method comprises the steps: a first slave device can receive a rate amplification factor from a main device, and the rate amplification factor is an adjustment coefficient of a first rate (i.e., the attribute value of a CIR attribute / PIR attribute); the first slave device determines a second rate (i.e., a valid CIR / PIR of the first slave device) by means of the rate amplification factor and the first rate. Therefore, even if the value of the first rate is limited, the effective CIR / PIR of the first slave device can be adjusted through the rate amplification factor. In other words, on the basis of not changing the existing attributes, the value of the CIR / PIR used by the first slave device during working is expanded. And the CIR / PIR configuration problem of a 50G PON and a future higher-rate PON is solved.

The invention discloses a magnetoelectric speed sensor signal acquisition circuit and a fault diagnosis method. The magnetoelectric speed sensor signal acquisition circuit comprises a low-pass filter circuit, an amplitude limiting circuit, a lifting and adjustable amplifying circuit, a self-adaptive peak detection circuit, a threshold adjusting circuit, an in-phase hysteresis comparison circuit, a fault detection circuit and a single chip microcomputer module. The lifting and adjustable amplifying circuit is used for lifting the peak value of the signal subjected to amplitude limiting in a bias manner and amplifying the signal by a certain multiple; the self-adaptive peak detection circuit is used for detecting and acquiring a peak voltage; the threshold adjusting circuit is used for dividing the peak voltage; the in-phase hysteresis comparison circuit is used for comparing two paths of input signals and outputting a square wave signal to the single chip microcomputer module to obtain a signal frequency value; the single-chip microcomputer module is used for controlling switching of amplification times based on the signal frequency value and controlling fault detection of the magnetoelectric speed sensor. The amplification factor is automatically switched based on the signal intensity, the threshold voltage of the comparator is dynamically adjusted according to the signal peak value, and the detection reliability is improved.

The invention belongs to the technical field of displacement sensing, and particularly relates to a double-layer differential grating displacement sensor based on an optical lever amplification effect, which is characterized in that a laser beam expander is arranged in the light path direction of a laser, an upper grating is arranged in the light path direction of the laser beam expander, and a lower grating is arranged in the light path direction of the upper grating; the objective lens is arranged in the light path direction of the lower grating, and the detector is arranged in the light path direction of the objective lens. Compared with a traditional grating displacement sensor, the grating displacement sensor has the advantages that optical displacement can be amplified spatially, and the amplification factor is gt; 5 times. The high-resolution grating Talbot image type displacement sensor has the advantages that by means of the input displacement amplification effect of the differential structure, high resolution can be achieved under the condition that a large-period grating and a large-pixel-size CCD are used, the problem that a traditional high-resolution grating Talbot image type displacement sensor has high requirements for the grating period and the pixel size of the CCD is solved, and the high-resolution grating Talbot image type displacement sensor has wide application prospects in the fields of mechanical positioning, semiconductor manufacturing and the like.

The invention discloses a digital debugging optimization processing method and system for an upper computer, and relates to the technical field of industrial automation and real-time control, and the method comprises the steps: generating a compensation amount based on a real-time network delay variance and an equipment inertia coefficient, and solving the problem of instruction time sequence drift caused by switch networking fluctuation; particularly, in a high-disturbance environment, action connection errors of precise equipment such as a welding robot and the like are compressed to be within a millisecond level through sliding window contraction and amplification coefficient self-adaptive adjustment, and the mechanical collision risk caused by field failure of preset parameters in a traditional scheme is avoided; in addition, the physical model of the PLC is mapped into motion response parameters, such as inertia and damping coefficients, by utilizing an equipment type library, so that time sequence calibration of equipment of different systems is realized under a unified platform; hardware does not need to be transformed or a special clock chip does not need to be additionally arranged, and the debugging cost of cross-manufacturer equipment integration is reduced.

The invention discloses a wind driven generator transmission chain health state assessment method based on wind speed vibration coupling, and the method specifically comprises the steps: installing a vibration sensor at a measurement point of a transmission chain, and collecting the vibration data of each measurement point in real time; repairing the collected vibration data by using a missing data reconstruction algorithm; carrying out band-pass filtering processing on the repaired vibration data of each measuring point according to a custom setting standard; performing feature extraction on the filtered vibration data, and calculating related vibration feature indexes to obtain feature values; according to the interval information of the rotating speed, the running state of the current equipment is judged, and if the rotating speed is in a specific interval, the calculated characteristic value is amplified according to a preset amplification factor; and judging the amplified RMS value of each measuring point according to a reference value in a custom set standard, and if the calculated value is higher than an early warning value and a danger value in the standard, performing time domain analysis and frequency domain analysis.

The invention discloses a contactor operation state on-line identification method based on image features and deep learning. The method comprises the following steps: firstly, collecting vibration and sound signals of a contactor in different operation states in an action process; then, calculating the characteristic frequency of the signal in the collision process of the seriously worn contact, and taking the characteristic frequency as an additional frequency component; performing CEEMDAN decomposition on the vibration and sound signals to obtain a plurality of IMF components; the main frequency of each IMF component is calculated, and IMF components containing additional frequency components are removed; calculating a correlation coefficient and an energy value between each remaining IMF component and the original signal; keeping the IMF components of which the correlation coefficients and the energy values are greater than the average value to obtain effective modal components of the vibration and sound signals; thirdly, optimizing a time interval parameter and an angle amplification factor of the SDP conversion technology by utilizing an intelligent optimization algorithm, and generating SDP images by utilizing effective modal components of the vibration signals and the sound signals according to the optimized parameters, so as to obtain a plurality of SDP images in different operation states; and finally, a state recognition model is constructed and trained, and the trained model is used for state recognition. According to the method, the influence of interference components on the effective mode is avoided, the feature expression effect of the SDP image is improved, and the recognition precision is improved.

The invention discloses a force balance hemispherical resonator gyroscope null drift compensation method and device, electronic equipment and a computer readable storage medium, and the method comprises the steps: setting a hemispherical resonator gyroscope in a force balance mode, pushing a vibration mode azimuth angle to a damping simple vibration shaft, enabling a sensitive shaft of the hemispherical resonator gyroscope to be vertical to the ground, and enabling the sensitive shaft to face upwards, changing the environment temperature of the hemispherical resonator gyroscope, the method comprises the following steps: acquiring circuit temperatures, actually measured resonant frequencies and zero-offset output measured values of a gyroscope in real time, constructing a regression model according to each circuit temperature and the corresponding actually measured resonant frequencies and zero-offset output measured values, solving the regression model to obtain fitting parameters, and substituting the fitting parameters into a zero-offset output compensation model to obtain a zero-offset compensation model. And calculating according to the zero offset output compensation model to obtain a compensated zero offset output value. The amplification factor difference of the circuit is reflected by the sampling temperature of the circuit, the zero drift is estimated and compensated by the two characteristics at the same time, and the compensated gyroscope can basically inhibit the influence of the zero drift.

The invention discloses a coal mine underground radio wave omnidirectional receiving system, which belongs to the technical field of radio wave receiving, and comprises a multi-frequency transmitting module, a high-sensitivity receiving module and a receiving monitoring module, the output end of the multi-frequency transmitting module is connected with the input end of the high-sensitivity receiving module, and the output end of the high-sensitivity receiving module is connected with the receiving monitoring module. The output end of the high-sensitivity receiving module is connected with the input end of the receiving monitoring module, and the output end of the receiving monitoring module is connected with the input end of the data analysis module; according to the invention, the phase-locked loop amplification circuit, the self-adaptive gain control circuit and the DSP digital processing circuit are arranged in the weak signal processing circuit, so that weak analog signals can be well extracted, automatically amplified and then converted into digital signals, the amplification factor can be automatically adjusted according to field conditions, and the signal receiving sensitivity and the signal-to-noise ratio are improved; and a DFT discrete Fourier transform method is adopted in the DSP digital processing circuit, so that the signal processing precision is greatly improved.

The invention relates to the technical field of multimedia playing, and provides a loudspeaker power adjustment method based on a DSP and a power amplifier and a storage medium, based on the uncontrollability of a signal processor for volume amplification times, a loudspeaker playing test is firstly carried out through a test audio file, and the maximum amplification times of the signal processor is obtained as a first adjustment parameter; based on the actual working parameter of the loudspeaker under the control of the first adjustment parameter, setting a second adjustment parameter for the playing parameter of the building project; and finally, setting the hardware power amplifier according to the second adjustment parameter, and playing the audio to be played based on the signal processor and the hardware power amplifier, so that the output power corresponding to the amplification factor of the whole system composed of the signal processor and the hardware power amplifier is enabled to be more stable through the controllable setting of the volume amplification factor of the hardware power amplifier and the compatibility of the uncontrollability of the signal processor. And the output power is always lower than or smaller than the rated output power of the loudspeaker, so that the normal operation of the loudspeaker can be protected while the playing effect is ensured.

The invention provides an intelligent management method for WebSocket connection, which comprises the following processes: a dynamic reconnection control process: when connection disconnection is detected, a reconnection interval Tn = min (T0 * 2 (n-1), Tmax) is calculated based on a historical disconnection frequency, Tn is waiting time of nth reconnection, T0 is an initial reconnection interval, and Tmax is a maximum allowable reconnection interval; the self-adaptive heartbeat mechanism process comprises the steps that after connection is established, a heartbeat task is automatically started, the heartbeat period P is dynamically adjusted according to the network condition, P = max (Pmin, k * RTTavg), Pmin is the minimum heartbeat period threshold value, k is the amplification coefficient, and RTTavg is the average round-trip delay; and the event-driven architecture process comprises the following steps of: configuring and connecting event processing logic through a declarative interface, and supporting callback functions of onOpen, onMessage, onError and onClose.

The invention provides an incremental analog-to-digital converter based on passive noise shaping and a signal processing method, which can be applied to the technical field of quantization. The incremental analog-to-digital converter comprises: an input integrating circuit configured to generate a (j-1) th low-order integrated voltage according to an input signal from a signal input end; generating a kth high-order integral voltage according to an input signal; the passive amplification circuit is configured to obtain a kth gain voltage according to the kth high-order integral voltage based on a predetermined amplification coefficient; the passive noise shaping circuit is configured to perform passive integration on the kth high-order integration voltage to obtain kth passive integration voltage, and perform passive gain on the kth passive integration voltage by using the kth gain voltage to obtain kth high-order gain voltage; a quantization circuit configured to quantize the M1 low-order integral voltages in M1 periods, respectively, to generate M1 coarse quantization values; m2 high-order gain voltages are quantized in M2 periods respectively, and M2 fine quantized values are generated.

The invention discloses a flexible excitation system electromechanical model modeling method and device, a medium and a product, and the method comprises the steps: constructing an electromechanical model of a power unit; then, building a closed-loop simulation model of the flexible excitation system; wherein the closed-loop simulation model comprises an electromechanical model used for simulating a power unit, a generator model used for simulating a generator, and an excitation regulator; obtaining piecewise linear functions of the maximum excitation voltage, the minimum excitation voltage and the generator terminal voltage; and obtaining a piecewise linear function of the static amplification factor of the power unit and the terminal voltage. According to the invention, on-site excitation system proportion magnification factor measurement and forced excitation capability verification test can be carried out, electromechanical modeling is realized, and a basis is provided for electromechanical transient simulation calculation.

The invention relates to the technical field of guide rail meter testing, in particular to a proportional operational amplifier circuit for simulating Rogowski coil signal output and a testing device, which comprises a current sampling loop for converting input current into voltage analog signal output, and a proportional amplification loop connected with the output end of the current sampling loop, and the analog module is used for amplifying an input voltage analog signal by an amplification coefficient K and then outputting the amplified voltage analog signal, and the amplification coefficient K is matched with the sensitivity coefficient S of the Rogowski coil to be simulated. Through the collaborative design of the high-precision current transformer and the proportional operational amplifier circuit, the primary side test current is reduced to below 50A, and meanwhile, a voltage signal which is equal to a Rogowski coil in proportion is accurately generated through the proportional operational amplifier circuit. According to the design scheme, the final test effect can be achieved by applying the current of 0.04-50A, the test environment is safer compared with the test environment with the large current of 500A, and the service life of the test bench body is protected.

The invention discloses an implementation method of a sub-connection active STAR-RIS assisted secure communication system. A base station, a sub-connection active STAR-RIS, a legal user and an eavesdropping user are included. According to the invention, M units of STAR-RIS are grouped into L sub-arrays, and an amplifier is shared to reduce power consumption and cost; with maximization of system secrecy energy efficiency as a target, base station beam forming, STAR-RIS reflection / transmission coefficients and amplifier amplification coefficients are jointly optimized; and solving the non-convex optimization problem by adopting an efficient algorithm based on block coordinate descent. According to the invention, the hardware overhead and the system power consumption are effectively reduced through the sub-connection structure, meanwhile, the secure transmission efficiency of the system is remarkably improved through joint optimization, multiplicative fading is overcome, and an efficient and reliable solution can be provided for 6G secure communication.

The invention provides a jet pipe array missile pitching channel jet flow opening method, device and equipment and a medium. The method comprises the steps that corresponding total thrust is calculated according to pitching control torque needed by a missile; generating a plurality of spray pipe opening combinations capable of providing total thrust according to the thrust of a single spray pipe in the spray pipe array, and taking the spray pipe opening combinations as initial candidate modes; a sequential constraint rule from the middle to the two sides is applied to each nozzle opening combination in the initial candidate modes, and candidate modes conforming to the constraint rule are obtained; calculating a jet amplification factor of the candidate mode conforming to the constraint rule in the current flight state, and evaluating the influence degree of jet interference; the candidate modes with the jet amplification factors smaller than the preset minimum threshold value of the jet amplification factors and conforming to the constraint rule are removed, and the remaining candidate modes conforming to the constraint rule serve as jet opening modes, so that the problem that the control effect is poor due to poor control torque adjustability, control coupling, insufficient spray pipe utilization rate and jet interference influence is solved.

A method for noise suppression in a hearing instrument includes using an acousto-electric input transducer of the hearing instrument to generate an input signal from ambient sound. A frequency-band-wise noise suppression is applied to a processing signal derived from the input signal. Stationary noise is detected in the respective frequency band, and depending on the detected stationary noise, an amplification factor of the processing signal is set for the relevant frequency band. An analysis adapted to detect stationary and non-stationary noise is applied to the processing signal. The analysis has a lower frequency resolution than the frequency-band-wise noise suppression and, upon detected presence of stationary and / or non-stationary noise in the analysis of the processing signal, the stationary noise in the frequency-band-wise noise suppression is presumed to be detected in each frequency band, and the corresponding amplification factors are set.

The invention belongs to the technical field of optical communication, and particularly relates to a feedback type space laser communication power adaptive compensation method. According to the method, a system comprising an A end, a B end and a feedback control circuit is constructed, and the method comprises the steps that a baseband signal of a transmitting end is modulated, amplified and then transmitted, an optical splitter of a receiving end distributes a received optical signal in proportion, 90% of the optical signal is used for communication demodulation to obtain information, and 10% of the optical signal is used for power detection; a signal for power detection is processed to generate an analog signal which is fed back to an opposite end. At a transmitting end, a demodulation and control unit regulates and controls the amplification factor of an optical amplifier according to a received power feedback control signal so as to realize self-adaptive compensation of the space laser communication power. According to the method, power fluctuation caused by factors such as atmospheric channel change and distance change can be dealt with in real time, the defects of traditional space laser communication power control are effectively overcome, and the reliability and stability of a communication link are remarkably improved.

The invention relates to a head unit and a liquid ejecting apparatus. The head unit includes: an ejection unit that includes a piezoelectric element driven according to a drive signal and ejects a liquid according to the driving of the piezoelectric element; a waveform shaping circuit to which a first residual vibration signal corresponding to residual vibration generated by the drive signal is input and which outputs a second residual vibration signal obtained by shaping the waveform of the first residual vibration signal; a temperature detection circuit that outputs a temperature information signal corresponding to the temperature of the waveform shaping circuit; and a determination circuit configured to determine a state of the ejection unit, the waveform shaping circuit including: an amplification circuit configured to amplify the first residual vibration signal; and an amplification factor setting circuit that sets the amplification factor of the amplification circuit, the waveform shaping circuit outputs a second residual vibration signal based on the signal amplified by the amplification circuit, the amplification circuit and the amplification factor setting circuit constitute a single semiconductor device, and the determination circuit determines the state of the ejection unit based on the second residual vibration signal and the temperature information signal.

The present invention provides a method and system for implementing medium- and low-frequency embedded super-real-time behavioral-level timing simulation, comprising loading and initializing a specified on-chip device according to target machine configuration information; setting a simulation time amplification factor for an IO instruction and a non-IO instruction statistical factor according to the minimum timing accuracy of the on-chip device; determining whether the current instruction is an IO instruction after each instruction is executed; when the number of non-IO instructions counted reaches a preset value, converting the currently counted non-IO instruction statistical factor into a simulation time parameter; when a simulation time condition is met, scheduling simulation events for devices that meet the simulation time condition in a simulation time scale order; exiting the scheduler after executing the currently passed simulation time; and executing the next round of instruction execution and simulation. The present invention has the advantages of high-precision timing simulation, efficient simulation scheduling, super-real-time performance, and the ability to meet user timing requirements, and has broad application prospects in the field of embedded system simulation.