25 results about "Signal Width" patented technology

The invention discloses an array eddy current detection method and system based on differential and amplitude decoupling, and the method comprises the steps: employing a differential array eddy current probe to collect a defect signal, enabling an excitation coil to be connected with a B end of an AD698, and enabling a receiving coil to be connected with an A end of the AD698; and an amplitude decoupling and phase compensation mechanism is introduced to improve the signal stability and the anti-interference capability in the detection process. The system realizes excitation signal output, received signal synchronous demodulation and amplitude extraction through an AD698 chip, the output form is the ratio of a received signal to an excitation signal, and the response capability to a weak defect signal is enhanced. And in combination with a multi-channel control strategy, automatic scanning and stable switching of a plurality of detection areas can be realized. In the data processing stage, time domain features such as peak values, peak-to-peak values and signal width are extracted, a quantitative evaluation model of the angle, depth and length of the crack is constructed based on the change rule of the time domain features, and reliable technical support is provided for crack detection and life prediction of the metal part with the complex structure.

The application discloses a kind of pulse shaping method and system of nuclear signal, belong to signal processing technical field, for the problems of existing pulse signal width in prior art Widening, thereby increasing the accumulation event, and there is no better anti-noise effect to Gaussian white noise, the present application includes: the output signal of detector is acquired, and output signal is structured into digital function signal;The Z transform is carried out after the discrete of the digital function signal, and output Z transform signal is obtained;Definition input signal is exponential signal, and the Z transform is carried out to the exponential signal, and input Z transform signal is obtained;According to the input Z transform signal and the output Z transform signal, the transfer function of input signal pulse shaping is obtained;The inverse Z transform is carried out to the transfer function, and the pulse shaping signal of input signal is obtained, and its time domain expression.The purpose is: the pulse shaping signal obtained has better signal-to-noise ratio, and it is convenient to obtain amplitude.

The application belongs to the technical field of vehicle communication, and specifically provides a CAN bus baud rate self-adaptive method, a terminal and a storage medium, which comprise updating a pin multiplexing module configuration, connecting a message receiving pin of a master control chip MCU with an input capture module in the master control chip MCU, initializing the input capture module, and setting a clock frequency to measure the pulse width of a current CAN pulse signal; according to a preset baud rate matching table, the upper and lower limits of the pulse width corresponding to each baud rate and the overall upper and lower limits are calculated; by directly measuring the pulse signal width on the CAN bus and combining the preset baud rate matching table, the application can quickly narrow the baud rate search range, reduce the number of unnecessary attempts, thereby significantly shorten the time required for the self-adaptive process, and improve the system startup speed and response capability.

The application relates to a device and a method for detecting the appearance health condition of a spherical element. The device is applied to a pebble bed reactor, and comprises a plurality of detection assemblies. Each detection assembly is fixed to the periphery of a loading and unloading pipe of the pebble bed reactor, and the detection axis of the detection assembly is perpendicular to the axial direction of the loading and unloading pipe. The detection assembly is used for acquiring a detection signal when the loading and unloading pipe is used to pass the spherical element. The detection signal changes with the movement process of the spherical element in the loading and unloading pipe. A processor is connected with each detection assembly. The processor is used for judging the appearance health condition of the spherical element according to the signal width difference of the vibration waveforms in a plurality of detection signals acquired for the same spherical element.

The present invention discloses a wearing detection method and system for a wearable device, the wearing detection method comprising: generating a single-tone signal and an orthogonal signal of the single-tone signal; transmitting the single-tone signal and receiving a reflected signal of the single-tone signal; calculating a propagation delay phase according to the single-tone signal, the orthogonal signal, the reflected signal and a preset sliding integration time; and obtaining a wearing state of the wearable device according to the propagation delay phase. In the present invention, the preset sliding integration time is an integer multiple of a half-cycle of the single-tone signal, so that the propagation delay phase obtained by the sliding correlation integral operation and phase calculation is independent of the amplitude of the reflected signal, and can avoid problems such as detection errors caused by amplitude jitter of the reflected signal in the prior art, thereby improving the accuracy of the wearing state detection of the wearable device; at the same time, a complex receiving front-end amplification circuit is not required, and the single-tone signal width requirement is relatively low.

The application discloses a display control method, device and electronic equipment, and belongs to the technical field of electronic equipment. The method comprises the following steps: determining a first proportion based on a target brightness of a screen and a target light-emitting circuit voltage, the first proportion being a proportion of the number of non-display pixel rows in a frame of picture under the target brightness; determining a brightness control parameter of N frames of picture based on the target brightness and the first proportion, the brightness control parameter comprising a dimming signal width and a dimming signal quantity, N being an integer greater than 1; and displaying the N frames of picture based on the brightness control parameter of the N frames of picture.

The invention relates to a starting and stopping detection circuit and method for vibration equipment and application. The starting and stopping detection circuit comprises a vibration energy collector and an output circuit. The input end of the output circuit is connected with the vibration energy collector, and the output end can be connected with detection ends of other systems; the output circuit comprises a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, an operational amplifier and an exclusive-OR gate for realizing logic exclusive-OR in digital logic; the circuit is low in design cost, simple in structure and ultra-low in power consumption, pulse signals are output only at the moment of starting and stopping of the vibration equipment so as to trigger a rear-end circuit to execute corresponding action instructions, and the width of the pulse signals can be set by adjusting the numerical values of the third resistor and the fifth capacitor.

The present invention discloses a Geiger-Müller counter signal acquisition circuit. This circuit incorporates a delayed discharge circuit at the output stage, accelerating the discharge of the GM tube cathode charge and shortening the GM tube circuit's dead time. Specifically, the circuit comprises a GM tube sampling circuit and a delayed discharge circuit. The GM tube sampling circuit is connected to the cathode of GM tube G1. The output stage of the GM tube sampling circuit is connected to the delayed discharge circuit and then to a counter. This accelerates the discharge of the GM tube cathode charge and shortens the GM tube circuit's dead time. The signal acquisition circuit proposed in this invention features a fixed output signal width determined by charging resistor R5 and charging capacitor C1, with dead time matching for different GM tubes. When the GM tube is overloaded, the circuit maintains continuous charging and discharging, outputting a fixed-frequency signal, preventing a drop in count rate due to overload.

The present invention discloses a method for pulse signal screening and signal quality evaluation, comprising the following steps: S1, obtaining a nuclear pulse index signal and determining the time width of a single signal; S2, calculating the average value of the signal amplitude within a single time width; S3, calculating the variance of the signal amplitude within a single time width; S4, drawing a scatter plot of the average and variance of all signals, and fitting a quadratic function curve to the scatter plot; S5, implementing screening of abnormal signals and signal quality evaluation through the scatter plot distribution. The present invention screens signals by calculating the average and variance of a standard nuclear pulse signal within a single signal width, requiring fewer computational resources. The type of abnormal signal is determined by the relative position of the scatter points of the signal mean and variance and the quadratic function curve fitted to its scatter distribution. This determination method is simple and does not require a complex algorithm program.

A signal processing system and method, and a computer-readable storage medium, relate to the field of signal detection technology. The signal processing system includes an I / O port and a processing unit. The I / O port includes at least one input port for acquiring an input variable signal. The processing unit is configured to: continuously detect changes in the polarity of the received variable signal level, and record the moment when the change in polarity is detected as an initial moment, wherein the change in polarity includes a change from low level to high level, or a change from high level to low level; after the initial moment, determine a variable signal time parameter based on the duration of the variable signal level, or the moment when another change in the polarity of the variable signal level is detected; compare the variable signal time parameter with a preset variable signal width threshold, and determine the variable signal as a valid variable signal when the comparison result between the variable signal time parameter and the preset variable signal width threshold meets a preset valid condition.

The invention provides a driving method and a driving device of a display device. The method comprises the following steps: setting different PWM pulse width thresholds and a PWM pulse signal width set value for a plurality of subframes; obtaining the original PWM pulse width of each subframe by using a scattering algorithm according to the original gray data of each frame of image; driving current and pulse width modulation is carried out on each sub-frame with the original PWM pulse width larger than a PWM pulse width threshold value, the modulation sequence of the driving current of each sub-frame is determined by the size sequence of the PWM pulse width threshold value, and the modulated PWM pulse width is smaller than or equal to the PWM pulse width set value of the sub-frame; and generating a PWM signal of the corresponding sub-frame according to the modulated PWM pulse width and the driving current, wherein the PWM signal is used for controlling picture display on the panel. According to the invention, the defect that the image gray scale is difficult to refine when the brightness is improved by increasing the driving current in the prior art is overcome.

The present invention provides an interference line spectrum confocal measurement structure, including a line light source, a spectroscopic prism, a dispersion prism, a dispersion objective lens, and a spectrum demodulation module. The line light source is used to generate a strip narrow light source. The spectroscopic prism is a polarization-insensitive prism, which divides the strip light source into two mutually perpendicular light paths. The strip light is then dispersed off-axis by the dispersion prism and axially by the dispersion objective lens, ultimately forming an illumination surface perpendicular to the horizontal. The illumination surfaces of the two light paths interfere with each other and enhance each other, and then return along the symmetrical light path again and enter the spectrum demodulation system. The spectrum demodulation system is composed of the dispersion prism and the dispersion objective lens, and can achieve high linearity in height and position. At the same time, the device can highly compress the detection signal width, thereby improving the measurement accuracy and repeatability of the device.

The PWM signal generation method and device provided by the application are applied to the field of power electronics technology, the method first controls a clock device to output a first clock signal and a second clock signal, then counts the first clock signal and the second clock signal in a preset number mode respectively, controls a phase adjustment device to adjust the phase of the second clock signal according to a preset phase difference during the counting process, and finally controls a signal generation device to output a current period PWM signal according to the counting value of the second clock signal or the counting values of the first clock signal and the second clock signal. Since the phase of the second clock signal changes, the corresponding signal width changes under the condition of using the same counting value, and further, since the preset phase difference is smaller than the clock period, the change of the signal width is correspondingly smaller than the clock period, that is, the PWM signal with a resolution smaller than the clock period and higher accuracy is realized, thereby meeting the actual application requirements.

The application belongs to the field of range hood, and discloses a range hood control method and device. The method comprises the following steps: receiving a first signal, the first signal being generated by a first group of infrared transceiver devices; starting the timing of a preset first signal period based on the first signal being in a first state; receiving a second signal, the second signal being generated by a second group of infrared transceiver devices; starting the timing of a preset second signal period based on the second signal being in the first state; and generating a control instruction according to the relative positions of the first group of infrared transceiver devices and the second group of infrared transceiver devices based on at least the first signal width and the second signal width reaching a first threshold value, wherein the first signal width is the length of time from the start of the first signal period timing to the first signal entering the last second state within the first signal period, and the second signal width is the length of time from the start of the second signal period timing to the second signal entering the last second state within the second signal period. The application can reduce false triggering.

The application provides a thickness AGC control method based on tension deviation detection and related equipment. The method comprises the following steps: measuring actual tension T act in real time; obtaining a tension setting value signal T ref , a thickness signal and a width signal of a strip; calculating unit tension deviation ΔT by using the tension setting value signal T ref , the thickness signal and the width signal and the actual tension T act ; calculating a change rate of the unit tension deviation based on the unit tension deviation ΔT; and obtaining a roll gap adjustment amount ΔS based on the change rate of the unit tension deviation. Thus, a thickness control method based on tension deviation is established. For raw materials, such as head and tail of tinned cold hard base plate or high-strength steel cold hard base plate, thickness fluctuation with high amplitude and high frequency caused by factors such as performance fluctuation can be well controlled in time, so that the thickness of the strip is stable, and the number of waste and defective products caused by thickness exceeding the standard is reduced.

The present disclosure relates to a digital phase signal generation system, comprising: a phase-locked frequency multiplication unit receiving a rotation speed pulse signal of a rotating shaft of a rotating machine, processing to obtain a frequency multiplication signal, obtaining a real-time shaft position value from the frequency multiplication signal and outputting; a digital setting unit obtaining a target phase value and outputting; a digital comparison unit receiving the real-time shaft position value and the target phase value in real time and comparing to obtain a synchronization signal pulse and outputting; a 60-based counter receiving and 60-based counting the synchronization signal pulse to obtain a counted signal and outputting; a decoder unit receiving the counted signal, taking the pulse of the counted signal as a starting phase, and forming a pulse signal through timing distribution; and a pulse distribution unit adjusting the signal pulse width of three independent pulse signals received to form six square wave signals with a mutual difference of 60 degrees, and the signal width of each adjacent two square wave signals being 180 degrees.

The present invention discloses a method for compensating the line error and subdivision error of an incremental encoder. The method first collects the encoder angle signal at a 2x frequency and calculates it into an IAS signal. Then, the IAS signal is subjected to S-G filtering to suppress speed fluctuations caused by line position and signal width error components. Then, its amplitude modulation function is calculated and the signal width error is calculated. Finally, the line position error is calculated using the signal width error and the amplitude modulation function. The 4x frequency angle signal is compensated using the signal width error and the line position error. The non-orthogonal error is estimated using the compensated 4x frequency angle signal. The 4x frequency angle signal of the encoder is further compensated using the signal width error, the line position error, and the non-orthogonal error, thereby improving the measurement accuracy of the incremental encoder. The method can improve the performance of equipment such as machine tools and industrial robots equipped with servo systems without increasing costs.

This disclosure relates to a driving device, chip, and apparatus for synchronous modulation of pulse width and amplitude. The driving device includes: a timing control module for generating pixel driving signals to drive pixel display; a width driving module electrically connected to the timing control module, generating a first pulse signal based on the pixel driving signals; an amplitude driving module electrically connected to the timing control module, generating a second pulse signal based on the pixel driving signals; and a driving module electrically connected to both the width driving module and the amplitude driving module, driving pixel display based on the width of the first pulse signal and the amplitude of the second pulse signal. This disclosure, by simultaneously writing the width driving module and the amplitude driving module into the driving module, enables the synchronous writing and driving of PAM and PWM source signals to the pixels, thereby reducing data transmission time, extending the effective light emission time within a frame, reducing IC size, improving IC cutting utilization, and reducing interference between different types of output channels.

An OSNR measurement method and apparatus, and a computer storage medium are disclosed. The OSNR measurement method may include: adjusting a measurement light source to an ASE state (S100); adjusting a signal width of the measurement light source to a first width according to a spectral bandwidth of a channel to be measured, and acquiring a total channel power at an OPM point of a receive-end station (S200); adjusting the signal width of the measurement light source to a second width, and acquiring a noise power at the OPM point of the receive-end station (S300), where the second width is less than the first width, and center frequencies of signals corresponding to the first width and the second width are staggered apart from each other; and determining an OSNR of the channel to be measured according to the total channel power and the noise power (S400).

The present disclosure provides an electron cyclotron resonance ion source beam supply control system for a particle accelerator treatment device, comprising: a client, configured to configure event trigger parameters and start / stop output control signals of event trigger light signals, monitor the output state of the event trigger light signals, configure event analysis parameters, and set the beam chopping pulse signal width and the electron cyclotron resonance ion source pulse signal width; a synchronization timing server, configured to output the event trigger light signals according to the event trigger parameters; a time synchronization server, configured to provide a unified time reference; a synchronization timing module, configured in a beam chopping or pulse beam control mode, configured to control the synchronization of the pulse beam control signal and the beam chopping control signal based on the unified time reference by comparing the event trigger light signal with the event analysis parameters, thereby generating a pulse beam or a DC beam and performing beam chopping; and a beam chopping and pulse beam monitoring server, configured to monitor the working state of the synchronization timing module and collect key action signals.

The invention discloses a scale factor real-time compensation method based on online monitoring of optical fiber parameters, which comprises the following steps of: 1, confirming variables of a closed-loop optical fiber gyroscope scale factor, including optical fiber length in an optical fiber ring, average diameter of the optical fiber ring and average wavelength of working light waves of an optical fiber gyroscope; 2, determining the change rule of the optical fiber length of the optical fiber ring and the average diameter of the optical fiber ring along with temperature; 3, determining the change rule of the fiber length of the fiber ring and the average wavelength of the working light wave of the fiber-optic gyroscope along with the temperature; and 4, compensating the calibration factor based on the change rule of the fiber length of the fiber ring, the average diameter of the fiber ring and the average wavelength of the working light wave of the fiber-optic gyroscope along with the temperature. According to the method, the width of the peak signal can be effectively controlled to be unchanged, the zero offset repeatability of the fiber-optic gyroscope in a full temperature range is improved, meanwhile, the problem of long-term consistency of scale factors of the fiber-optic gyroscope is solved, and unified calibration and compensation of the same batch can be realized.

The invention discloses a signal processing system and method and a computer readable storage medium, and relates to the technical field of signal detection. The signal processing system comprises an IO port and a processing unit. The IO port comprises at least one input port and is used for acquiring an input variable electric signal. The processing unit is configured to continuously detect the level polarity change of the received variable electric signal, and record the moment when the level polarity of the variable electric signal is detected to change as the initial moment, and the level polarity change comprises change from low level to high level or change from high level to low level; after the initial moment, determining a power transformation time parameter of the power transformation signal according to the level duration of the power transformation signal or the moment when the level polarity change of the power transformation signal is detected again; and comparing the power transformation time parameter with a preset power transformation signal width threshold value, and when a comparison result of the power transformation time parameter and the preset power transformation signal width threshold value meets a preset effective condition, determining that the power transformation signal is an effective power transformation signal.

Provided is a method for self-calibration of comparators. The comparator may be a threshold inverter quantization (TIQ) comparator. The method provides for simultaneous self-calibration of both the PVT corner dependent threshold voltage and the PVT corner dependent reaction time of a TIQ comparator. The method includes pre-charging a capacitor of the comparator by a first current, and then discharging the capacitor such that the capacitor voltage drops to a trip voltage equal to a delay dependent voltage below the threshold voltage. The capacitor is then charged by a signal current to capture a signal on the capacitor and then discharged until the capacitor voltage equals the trip voltage thereby tripping the capacitor to generate an output time pulse from the comparator, where the output time pulse is equal to a signal width of the signal.

Provided are a driving method and a driving device of a display device. The method comprises: setting PWM pulse width threshold values different from each other and a PWM pulse signal width setting value for a plurality of subframes; obtaining original PWM pulse widths of the subframes by using a scattering algorithm according to original gray data of each frame of image; for each subframe whose original PWM pulse width is greater than the PWM pulse width threshold value, performing driving current and pulse width modulation, wherein the size order of the PWM pulse width threshold values determines the modulation order of the driving current of each subframe, and the modulated PWM pulse width is less than or equal to the PWM pulse width setting value of the subframe; and generating a PWM signal of the corresponding subframe according to the modulated PWM pulse width and the driving current, wherein the PWM signal is used for controlling the display of the picture on the panel. The present application solves the defect of difficulty in image gray scale refinement caused by the increase of the driving current to realize the brightness improvement.

The invention provides a high repetition frequency picosecond-level negative pulse generation circuit for a gated camera, and the circuit comprises a power module and a signal generation module: the power module is used for providing a stable power supply for the signal generation module, and comprises an LDO circuit and a DC / DC boost circuit which are connected in parallel; the signal generation module is used for converting an input trigger pulse into a picosecond negative pulse to be output, and comprises a Schmidt shaping circuit, a narrow pulse generation circuit, an overvoltage trigger circuit, a Marx circuit, a high-pass filter circuit and a pulse width adjusting circuit which are connected in sequence; the narrow pulse generation circuit generates a narrow pulse signal, and the overvoltage trigger circuit triggers the Marx circuit to output a nanosecond negative pulse signal; after the nanosecond negative pulse signal passes through the high-pass filter, a higher harmonic signal is extracted, the signal width of the higher harmonic signal is reduced by a step recovery diode of the pulse width adjusting circuit, and a picosecond negative pulse signal is output.