109 results about "Pulse period" patented technology

The invention provides a knob dimming method which comprises the following steps: S1, when a falling edge is detected in each interruption of a program, performing input falling edge interruption on a pin A, and then starting a timer; s2, judging whether the timing time of the timer is up or not, if not, returning to S1, and if so, reading the signal level of the pin A; and S3, judging whether the signal level of the pin A read in S2 is a low level or not, if not, returning to S1, and if so, judging that the level of the pin A is valid. According to the invention, the effective level can be rapidly obtained after the level recovers to be stable, the maximum delay time or pulse period is not measured again by means of device replacement, the knob level is read by dynamically setting timing, misjudgment is greatly avoided, and in addition, the problem of pulse signal counting coverage caused by rapid rotation of the knob is also solved.

A Flash beam dose control method and a related device. The Flash beam dose control method comprises: obtaining a Flash beam output dose demand; controlling, by means of a Flash tuning mode, the number of pulse periods of output beam charges within a preset time; and / or controlling the pulse width of an ion source voltage by means of a pulse width mapping curve, so as to control a Flash beam output dose rate. By precisely controlling the number of pulse periods of output beam charges and the pulse width of the ion source voltage, the Flash beam output dose rate can be precisely controlled without requiring an additional shielding function for a proton therapy room, so that the dose of Flash can also be tuned in a conventional proton therapy room, thereby facilitating implementation of particle Flash radiotherapy.

The invention relates to the technical field of medical data processing, in particular to an intelligent drainage method and system based on cerebrospinal fluid pressure, and the method comprises the steps: obtaining a pressure signal curve and a pulse period of a cerebrospinal fluid intelligent drainage system at each detection position; obtaining a synchronous conduction error value according to the signal change trend in the pulse period of the to-be-analyzed signal curves of each detection position and other detection positions in combination with the signal change trend between the historical signal curves; according to the signal delay condition between pulse periods in the signal curve to be analyzed of each detection position and other detection positions, combining the signal delay condition of the historical signal curve to obtain a signal delay characteristic value; according to the synchronous conduction error value, the signal delay characteristic value and the signal change trend, analyzing the signal artifacts of each pulse period in the signal curve to be analyzed to obtain an artifact-removed signal; the de-artifact signal is used for a drainage operation. According to the invention, the occurrence of misrecognition is reduced, and the reliability of intelligent drainage decision is ensured.

The invention relates to the technical field of radars, in particular to a weather radar distance resolution calibration method and system. The method comprises the following steps: collecting oversampling original baseband I / Q data of a point target in a plurality of continuous pulse periods; determining a pulse signal-to-noise ratio, and screening out effective pulses according to a threshold value; carrying out sub-sampling stage time alignment on the effective pulses based on cross-correlation analysis, and carrying out incoherent averaging on power module values of all the aligned pulses to generate an average pulse power envelope; converting the average pulse power envelope to a logarithm domain, and selecting discrete data points in a main lobe region; according to the discrete data points, a nonlinear least square method is adopted to carry out iterative fitting on the generalized Gaussian mathematical model, and a continuous analytic function describing the pulse envelope is obtained; according to the continuous analytic function, determining a pulse time width when the power is reduced to a peak value of-6dB; and determining the real distance resolution according to the pulse time width. The measurement robustness is improved, and sub-meter calibration precision is achieved.

The application discloses a kind of carbon dioxide laser pulse signal quality detection and anti-interference control method and system, it is related to the field of device using stimulated emission, this method includes: when enabling effective state indication is effective, external pulse width modulation signal is sampled, and the sequence of multiple-point sampling buffer is obtained, the rising edge and the falling edge of external pulse width modulation signal are determined, and the pulse period measurement value and the pulse width measurement value of current pulse are calculated;Determine the preset duty cycle interval to which the duty cycle of current pulse belongs, and generate a duty cycle interval flag;Measure power measurement value, and compare with the proportional threshold value generated based on current pulse width measurement value, to determine power abnormal state;When power abnormal state is abnormal, determine shielding period in preset mapping table according to duty cycle interval flag, generate protection control signal, and perform anti-interference control to laser. By implementing the present application, abnormal detection and anti-interference control of laser output in a larger duty cycle range can be realized.

The application provides a bearing gear fault automatic diagnosis method, system, equipment and storage medium, the method comprises the following steps: obtaining a sampling frequency through a spectrum sensing sampling frequency convex optimization algorithm; obtaining the installation number of a signal sensitive sensor through a multi-factor weighted constraint scaling algorithm; obtaining a signal to be processed according to the sampling frequency and the installation number of the signal sensitive sensor, processing the signal to be processed, and obtaining a fault diagnosis result; the bearing gear fault automatic diagnosis method solves the problem of monitoring the inventory equipment; when processing the signal, a hardware pulse is used as a sampling clock source, software interruption and the delay and jitter of calculation are avoided, high-precision synchronous sampling is realized, the non-stationary phenomenon of the signal caused by speed fluctuation is eliminated, and the signal analysis precision is improved; speed measurement and sampling frequency adjustment are completed within one pulse period, the response is fast, and high-speed and high-dynamic speed changes can be tracked; the bearing gear fault automatic diagnosis method has a wide application range and high practicability.

Provided in the embodiments of the present application are a signal processing method, circuit and chip and an electronic device. The signal processing method comprises: performing PWM modulation on an input signal to obtain a PWM positive signal and a PWM negative signal; and, on the basis of the PWM positive signal and the PWM negative signal, outputting a positive output signal and a negative output signal, wherein in response to the amplitude of the input signal being not equal to 0, the positive output signal and the negative output signal each comprise two pulses in one pulse period. The present solution can reduce the frequency requirements for passive filters processing positive output signals and negative output signals, thereby reducing the cost of signal processing systems.

A method for etching a substrate includes pulsing an RF power at a given frequency to generate a plasma for etching the substrate where each pulse period has an ON-state and an OFF-state comprising a duty cycle, selecting an ON-state duration of the duty cycle based on, at least in part, a first duration for restriking the plasma, a second duration for a minimum on-time per a given RF power source providing the RF power, and a third duration for the plasma to reach a steady state, selecting an OFF- state duration of the duty cycle for each pulse period to alter a profile loading, a iso-dense depth loading, or a critical dimension (CD) loading etching effect associated with a feature to be formed on the substrate, and forming the feature by using the duty cycle for the RF power to etch the substrate.

The application relates to an ANPC three-level converter and a narrow pulse elimination method and device thereof, and is characterized by comprising the following steps: collecting signal data of a converter to calculate initial comparison values of a pulse modulation module of the converter for generating a pulse width modulation wave; calculating a narrow pulse lower limit value T down and a narrow pulse upper limit value T up according to a clock frequency T clock , a dead time T s , a narrow pulse time T N and a pulse period T PRD of the pulse modulation module; when the initial comparison value is greater than the narrow pulse upper limit value T up , setting a final comparison value as the narrow pulse upper limit value T up ; when the comparison value is less than 0, performing positive processing on the initial comparison value to make the final comparison value a positive value; when the comparison value is less than the narrow pulse lower limit value T down , setting the final comparison value as 0; and generating a pulse width modulation wave for regulating the converter by using the final comparison value. The problem that narrow pulses easily cause damage to power devices in the converter is solved.

The present invention provides a radar co-frequency asynchronous interference suppression method based on slow-time interpolation, the method comprising: extracting sample data sets X of the same range gate Nr received by the radar in the slow-time dimension. Nr_i The sample data group X Nr_i The process involves filtering to identify pulse period sequence group K containing interference signals. j And the pulse period sequence number group K that does not contain interference signals s The interference signal is restored; slow-time dimension sample interpolation is performed to obtain the processed signal X'. Nr_Kj Improve the performance of the radar.

The invention relates to the technical field of industrial automatic control, and discloses an industrial automatic dust-free production control system and method for konjaku flour, and the system comprises a fluidized bed type jet mill, a pulse control module, a multi-dimensional online sensing module, an in-situ conditioning module and a cooperative control core module. The core of the system is that the cooperative control core enables the system to operate in an alternating working pulse period and a dormancy conditioning period through a pulse control module. In the dormancy conditioning period with low energy, the multi-dimensional online sensing module collects state parameters such as resonant frequency, temperature and images of materials. And the cooperative control core makes a decision based on the parameters, starts the in-situ hardening and tempering module as required to carry out cooling or embrittlement processing, and adaptively adjusts the duration of the next working pulse period to form closed-loop control. According to the invention, the automation of the whole production process is realized, the thermal damage of the material is effectively prevented, and the high consistency of the product quality and the robustness of the production process are ensured.

This invention discloses an adaptive waveform scheduling method for swarm target tracking based on deep reinforcement learning. By constructing a state space that integrates swarm motion characteristics and spatial distribution, a composite reward function is designed to comprehensively optimize tracking accuracy, resolution, and trajectory stability. A Deep Belief Policy Gradient (DDPG) framework enhanced with Long Short-Term Memory (LSTM) networks is employed to dynamically determine waveform parameters (pulse width, bandwidth, and pulse period). Compared to traditional rule-based scheduling methods, this algorithm can effectively handle dynamic formation changes in swarm targets, balancing tracking accuracy, resolution, and stability in complex scenarios.

Fault detection of an intravascular lithotripsy (IVL) device and a circuit including one or more transmitters. The balancing current circuit comprises a high voltage power supply, a control device or console, and at least one emitter comprising a pair of electrodes between which a spark is to be generated. Under normal working conditions, voltage is applied through the two conductors, a closed circuit is formed, and current flows between the two conductors when sparks occur. In normal cases, the current IC on the first conductor from the console to the transmitter is the same as the current IR on the second conductor from the transmitter back to the high voltage power supply. In this case, the circuit is in a balanced state. In such a balanced state, there is no sign of current leakage of the circuit. In the imbalance state of the circuit, the current IC is compared with the current IR, showing the current amplitude difference of the pulse over time during the pulse period. Specifically, when the current IR is less than the current IC, there is a circuit imbalance, which indicates a loss or leakage of the current IF.

The invention provides a non-uniform double-pulse modulation method based on a TCM. The non-uniform double-pulse modulation method comprises the steps that 1, a non-uniform double-pulse period modulation model is constructed; 2, carrying out radar echo modulation analysis; 3, analyzing a pulse compression result; and step 4, regulation and control effect analysis based on a CFAR detector. According to the method, the key parameter of the time delay factor is innovatively introduced, the modulation flexibility and unpredictability are greatly improved through the collaborative design of three degrees of freedom, and the problems of insufficient flexibility and the like existing in a radar target feature regulation and control method are solved. Compared with a regulation and control method based on TCM uniform monopulse period modulation, the generated harmonic peak amplitude distribution is diversified, screening of regular signals by a radar CFAR detector is effectively avoided, and the number of effective harmonic peaks passing detection is remarkably increased. According to the invention, precise suppression or enhancement of specific-order harmonics can be realized, and a technical approach is provided for implementing flexible and dynamic radar target feature regulation and control.

The embodiment of the invention provides a signal processing method and circuit, a chip and electronic equipment, and the method comprises the steps: carrying out the PWM modulation of an input signal, and obtaining a PWM positive signal and a PWM negative signal; outputting a positive output signal and a negative output signal according to the PWM positive signal and the PWM negative signal; wherein in response to the fact that the absolute value of the amplitude of the input signal is larger than a threshold value, one of the positive output signal and the negative output signal does not comprise pulses, and the other one of the positive output signal and the negative output signal comprises two pulses in one pulse period. According to the scheme, the performance of the output signal can be improved while the performance is improved.

The invention relates to a method for operating an ultrasound sensor, comprising emitting a train of ultrasound pulses as a series of ultrasound pulses having a pulse length T1 and a pulse interval T2. The sum of the pulse length T1 and the pulse interval T2 represents that the pulse period length T is equal to T1 + T2. The ultrasonic pulse train starts at a first time t1 and ends at a second time t2. The instantaneous pulse frequency fm, NL = 1 / T corresponds to the reciprocal of the instantaneous pulse length T. The instantaneous pulse frequency fm, NL passes through a first frequency range [Delta] fu during a first time period [Delta] tu, passes through an intermediate frequency range [Delta] fc in a subsequent intermediate time period [Delta] tc, and passes through a second frequency range [Delta] fl in a subsequent second time period [Delta] t2. The time length of the intermediate time period [Delta] tc is equal to or greater than the sum of the first time period [Delta] tu and the second time period [Delta] tl.

To provide a pulse width modulation device that is suitable for reducing PWM noise.SOLUTION: A pulse modulation device 24, which changes a duty ratio of pulses in a pulse period, includes: a pulse period command unit 45 that generates a pulse period command; a duty ratio command unit 44 that generates a duty ratio command; and a pulse width modulation unit 46 that generates pulses with the duty ratio commanded by the duty ratio command unit 44 within the pulse period commanded by the pulse period command unit 45, wherein a length of the pulse period generated by the pulse period command unit 45 as a command, is variable.SELECTED DRAWING: Figure 5

The invention belongs to the technical field of piezoelectric driving, and particularly relates to a noise reduction piezoelectric driving method and system and a lens driving device. According to the noise reduction piezoelectric driving method, a square wave signal is adopted to drive a piezoelectric element; in the control period when the piezoelectric element is driven, the control period is divided into a plurality of adjusting periods with the same time interval, the pulse frequencies of the pulse periods in the adjusting periods are adjusted to be the same, and the pulse frequency of at least one adjusting period is adjusted to be different from the pulse frequencies of other adjusting periods. According to the invention, a variable square wave driving mode is adopted, driving square waves for driving the piezoelectric element are regulated and controlled during starting and stopping, and the combination of different driving square waves is utilized, so that the speed and acceleration change rate of the piezoelectric element for starting and stopping movement are reduced, and the noise problem can be effectively improved.

The invention provides a bearing gear fault automatic diagnosis method, system and device, and a storage medium. The method comprises the following steps: obtaining a sampling frequency through a spectrum sensing sampling frequency convex optimization algorithm; obtaining the installation number of the signal sensitive sensors through a multi-factor weighted constraint scaling algorithm; acquiring a to-be-processed signal according to the sampling frequency and the installation number of the signal sensitive sensors, and processing the to-be-processed signal to obtain a fault diagnosis result; according to the bearing gear fault automatic diagnosis method, the stock equipment monitoring problem is solved; during signal processing, hardware pulse is used as a sampling clock source, so that software interruption and delay and jitter of calculation are avoided, high-precision synchronous sampling is realized, the phenomenon of signal instability caused by rotating speed fluctuation is eliminated, and the signal analysis precision is improved; rotation speed measurement and sampling frequency adjustment are completed in one pulse period, response is fast, and high-speed and high-dynamic rotation speed changes can be tracked; the bearing gear fault automatic diagnosis method is large in application range and high in practicability.

The application provides a multi-channel holmium laser cooperative output control method and system for high-power holmium laser equipment, which comprises the following steps: determining the feasibility of the emission of each laser channel in the next pulse period based on the target pulse parameters of the current treatment mode and the real-time state data of the multi-channel laser, to obtain candidate available channels; determining the current emission channel based on the historical working data, energy feedback data and real-time electrical state of each channel in the candidate available channels; adjusting the timing parameters of the laser trigger signal based on the state recovery requirements of the current emission channel, the optical path switching time consumption and the inherent delay of the system, to obtain a synchronous trigger instruction; and triggering the current emission channel to perform laser pulse emission after confirming the optical path alignment based on the optical path switching mechanism in response to the synchronous trigger instruction, and updating the energy feedback data based on the energy deviation of the current laser pulse emission. The application guarantees the accuracy and reliability of clinical treatment.

The invention belongs to the technical field of piezoelectric driving, and particularly relates to a noise reduction piezoelectric driving method and system and a lens driving device. According to the noise reduction piezoelectric driving method, a square wave signal is adopted to drive a piezoelectric element; in a control period when driving the piezoelectric element, the duty ratio of at least one pulse period is adjusted to be different from the duty ratios of the other pulse periods. According to the invention, a variable square wave driving mode is adopted, driving square waves for driving the piezoelectric element are regulated and controlled during starting and stopping, and the combination of different driving square waves is utilized, so that the speed and acceleration change rate of the piezoelectric element for starting and stopping movement are reduced, and the noise problem can be effectively improved.

This invention discloses an integrated ranging and velocity measurement method based on single-photon lidar, belonging to the field of high-precision laser detection technology. The method includes: obtaining the absolute detection time sequence of the photon response in the echo signal by referring to the absolute time of the zero point at the receiver; calculating the fundamental frequency f' of the echo signal and obtaining the pulse period t of the echo signal. r '=1 / f'; based on t r 'With the pulse period t of the transmitted signal r The Doppler equation is used to obtain an estimate of the target's radial velocity, calculate the relative detection time after motion compensation, and obtain an initial estimate of the initial photon flight time. Substituting these values ​​into the maximum likelihood estimation function, gradient optimization is performed to obtain its local optimum, thus achieving integrated measurement of the target's range and radial velocity. This invention enables the simultaneous acquisition of range and radial velocity in the same physical process.

Provided in the embodiments of the present application are a signal processing method, circuit and chip, and an electronic device. The signal processing method comprises: performing PWM on an input signal to obtain a PWM positive signal and a PWM negative signal; and outputting a positive output signal and a negative output signal on the basis of the PWM positive signal and the PWM negative signal, wherein in response to the absolute value of the amplitude of the input signal being greater than 0 and less than a first threshold, both the positive output signal and the negative output signal comprise two pulses within one pulse period, and the pulse widths of the pulses included in the positive output signal and the negative output signal are different. The present solution can reduce the frequency requirements of a passive filter for processing positive output signals and negative output signals, thereby reducing the costs of signal processing systems.

A SAR-ADC circuit, a control method therefor, and a communication system. The circuit comprises: a timing control module (20), an output selection module (30) and an asynchronous analog-to-digital conversion module group. The timing control module (20) is configured to output at least two second clock signals having the same frequency and successively delayed. An input signal and each of the second clock signals are input into the asynchronous analog-to-digital conversion module group, which is configured to sample and convert the input signal in each pulse period of each of the second clock signals. The output selection module (30) is connected to the asynchronous analog-to-digital conversion module group, and is configured to selectively output a conversion result of the asynchronous analog-to-digital conversion module group in each pulse period of each of the second clock signals.

The present application relates to the technical field of laser radar performance test, especially to a kind of pulsed laser radar anti-interference performance test method.The method comprises: placing the radar to be tested and the interference source closely and side by side along the horizontal direction, and placing the photoelectric detector along the vertical direction;opening the radar to be tested and the interference source preheating, observing the pulse form and pulse period of the radar to be tested using the photoelectric detector;adjusting the pulse form, pulse period and trigger delay of the interference source, so that it is consistent with the pulse form and pulse period of the radar to be tested, and the pulse time is synchronized;placing a reflecting plate in front of the radar to be tested, so that the normal line of the reflecting plate is parallel to the optical axis of the radar to be tested;adjusting the exit direction of the interference source;turning off or on the interference source, and collecting the test results of the radar to be tested when there is no or there is interference at the center of the field of view of the radar to be tested;judging the anti-interference performance of the radar to be tested according to the test results.The advantage is that the temporal and spatial synchronization of the interference source and the radar to be tested is realized.

The embodiment of the invention provides a signal processing method and circuit, a chip and electronic equipment, and the method comprises the steps: carrying out the PWM modulation of an input signal, and obtaining a PWM positive signal and a PWM negative signal; outputting a positive output signal and a negative output signal according to the PWM positive signal and the PWM negative signal; wherein in response to the fact that the absolute value of the amplitude of the input signal is larger than 0 and smaller than a first threshold value, the positive output signal and the negative output signal both comprise two pulses in one pulse period, and the pulse widths of the pulses included in the positive output signal and the negative output signal are different. According to the scheme, the frequency requirement of the passive filter for processing the positive output signal and the negative output signal can be reduced, so that the cost of a signal processing system is reduced.

Various aspects of the present disclosure relate to an enhanced synchronization signal (SS) block structure or design for 6G radio access technologies and other access technologies. The SS block structures may enable the transmission of physical broadcast channel (PBCH) signals at periodicities different than, unique to, or separate from periodicities of SS bursts, such as SS bursts that comprise multiple synchronization signal (SS) blocks. For example, the synchronization signal block structures may decouple the PBCH (and / or other channels) from the SS, facilitating time division multiplexing and / or frequency division multiplexing of the PBCH with respect to the synchronization signals of the SS block.

A plasma processing apparatus disclosed in the present invention has a chamber, a substrate support section, a high-frequency power source, and a bias power source. The high-frequency power source generates source high-frequency power for generating plasma in the chamber. The bias power source applies a pulse of bias energy to a bias electrode in each of a plurality of pulse periods. The high-frequency power source sets a source frequency of the source high-frequency power in each of a plurality of phase periods in each of a plurality of overlap periods overlapping the plurality of pulse periods, respectively, in accordance with a change in a degree of reflection. The degree of reflection is determined by using mutually different source frequencies in the same phase period within two or more preceding overlap periods.

The present disclosure relates to a cell balancing method and a cell balancing device performing the cell balancing method, and a battery pack. The cell balancing device may include: a storage device that storage a balancing profile for cell balancing; a balancing device configured to perform a discharge function for cell balancing of a plurality of battery cells; and a first controller configured to control the balancing device to perform pulse discharge for a balancing target battery cell selected from among the plurality of battery cells referring to the balancing profile if the cell balancing is required. The balancing profile may include a pulse period and a duty cycle set based on a natural frequency of a dendrite. The balancing device may be further configured to perform the pulse discharge according to a pulse signal that satisfies the pulse period and the duty cycle.

The invention discloses an argon arc welding pulse signal processing method, a motor synchronous control method and a welding device. The argon arc welding pulse signal processing method comprises the steps that S1, pulse electric signals output by a welding machine are converted into basic analog voltage signals related to pulse electric signal characteristics; s2, processing the basic analog voltage signal, and outputting a standard analog sampling signal meeting a preset parameter range; s3, performing analog-to-digital conversion on the standard analog sampling signal, and extracting a feature signal through a software algorithm; s4, wave crest characteristic values and wave trough characteristic values of the welding pulse electric signals are obtained; s5, generating a binary logic signal corresponding to the pulse period; s6, carrying out jump detection on the binary logic signal; s7, when a falling edge trigger signal arrives, a welding associated motor is started; and when the rising edge trigger signal arrives, the welding associated motor is stopped, so that the operation state of the welding associated motor is synchronized with the periodic characteristics of the welding pulse signal. The method has the effect of improving the welding synchronization precision and the welding anti-interference performance.