13 results about "Normal pulses" patented technology

The present application relates to the technical field of medical devices, in particular to an electronic non-affinity friction nanogenerator and a heart disease detector and a preparation method thereof. The generator comprises a first friction layer, a second friction layer, a first electrode and a second electrode; by adjusting the composition of the same material, the electron gain and loss ability of the material is changed, the first friction layer and the second friction layer are made of the same material, and the composition of the material used by the first friction layer and the second friction layer is different, so that the electron gain and loss ability of the first friction layer and the second friction layer is different, thereby realizing electronic non-affinity friction nanogeneration, using the high sensitivity to pressure to extract the characteristic signal points of the pulse wave, realizing the function of self-powered single-point detection of human heart rate, diastolic pressure and systolic pressure; in addition, it is sensitive and high, and can detect the subtle changes of the pulse wave, and since the pulse wave of a patient with heart disease is different from the normal pulse wave, it can be applied to the preparation of a heart disease detector.

The application discloses a kind of wind turbine speed signal analysis method and system based on flange bolt, the method includes the following steps: based on flange bolt collection pulse basic information;Judge whether the first pulse pulse width exists abnormal condition;Accumulate original pulse information, identify abnormal condition in original pulse information, and correct pulse width variation anomaly;The proportion of abnormal pulse is counted and calculated;Identify the pulse characteristics in accumulated original pulse information, obtain N normal pulse signals according to pulse characteristics, use the N normal pulse signals instead of single pulse period to calculate initial impeller speed;Extract the pulse that meets preset period, add in impeller speed calculation;The probability of occurrence of various abnormal characteristics in speed is counted;The application corrects various abnormal signals, filters out normal bolt pulse signal, to improve the accuracy of speed calculation, reduce the abnormal fluctuation of speed caused by interference factor, provide more accurate data analysis for wind turbine.

A display device includes display pixels and light sensing pixels in a display area. A display scan driver is configured to drive the display pixels to emit light. Alight sensing scan driver is configured to drive the light sensing pixels to sense light. A main driving circuit is configured to detect pulse wave signals and measure biometric information using the light sensing signals received through the light sensing pixels. The main driving circuit determines a normal pulse wave signal detection period or an inaccurate pulse wave signal detection period at biometric information measurement start period, changes the pulse wave signals detection conditions at the inaccurate pulse wave signal detection period to re-detect the pulse wave signals, and measures the biometric information with the normal pulse wave signal.

The application discloses a kind of intelligent portable pulse wave determination watches, it is related to pulse wave determination technical field, to solve the problem of not enough convenient when determining pulse and the problem of inaccurate measurement result.The intelligent portable pulse wave determination watch, including dial and pulse sensor, the dial upper end is with upper band, the inner wall of upper band is provided with clamping block, the dial bottom end is connected with lower band one end, a plurality of clamping holes are opened in lower band, three groups of sensors are used different measurement methods to measure pulse, three groups of collected pulse measurement data can be obtained after measurement, so that data acquisition is no longer single, through the calculation of later stage, pulse data is more accurate, different data threshold is divided into multiple groups, after division, the data is divided into different levels according to grade alarm module, alarm sound can be spread out through loudspeaker, normal pulse data can be displayed in electronic display screen.

The invention discloses an urban fast rail axle counting vehicle interference identification method and system, and belongs to the technical field of train safety protection, and the method comprises the steps: collecting wheel information through a wheel sensor, carrying out the preprocessing of the wheel information through a signal processing board, carrying out the differentiation of a blocking value, a non-blocking value, an overcurrent value and a disconnection value, and carrying out the recognition of the vehicle interference. Generating a digital pulse signal combined by two lines and four states; the digital pulse signal is sent to a counting board, a normal pulse signal, an axle counting digital pulse signal and an interference pulse signal are identified, and the interference pulse signal is subjected to redundancy; the normal pulse signals, the axle counting digital pulse signals and redundant information are sent to an alarm system through the counting board, the pulse signals are recorded, an alarm is given, interference pulse signals are output, and urban fast rail axle counting vehicle interference identification is completed. According to the invention, the situation of wrong axle counting caused by most electromagnetic interference can be effectively identified, and the accuracy of interference pulse signal identification is improved.

The present application relates to a kind of high beam quality laser of adjustable repetition frequency, comprising: seed source, output 20-100MHz repetition frequency picosecond signal laser;Pulse selector is connected seed source and is configured as: response to target repetition frequency value set by user, when repetition frequency>50kHz, carry out normal pulse selection, when repetition frequency≤50kHz, enable Burst Mode editing function, generate the pulse train envelope containing 2-10 sub-pulses;Three-stage laser amplifier in series, pulse is amplified, each stage contains pump source, focusing lens and laser crystal;Thermal lens cooperative control unit is used to improve the thermal lens effect of laser crystal, including: pump spot adjusting module, response the target repetition frequency value, automatically adjust the distance of each stage focusing lens to laser crystal and pump current;Pulse energy editing module, under Burst Mode, dynamically modulate the sub-pulse energy in pulse train and make it show increasing distribution;Uniform temperature field module, including the TEC array and temperature sensor array arranged around laser crystal, according to target repetition frequency value, automatically match laser crystal temperature field set value and maintain laser crystal temperature field uniform, the high beam quality laser of adjustable repetition frequency provided by the present application supports adjustable repetition frequency, and after repetition frequency is adjusted in a large range, thermal lens effect in laser crystal, thermal equilibrium is stable, laser can stably output excellent beam quality laser beam.

The invention discloses a water volume detection method for a pressure cooker water cooling system and a pressure cooker, the water cooling system comprises a water tank, a water pump, a circulating waterway and a cooling bin, the circulating waterway is communicated with the water tank and the cooling bin, and the circulating waterway comprises a water supply waterway and a water return waterway; the detection method comprises the steps that pulse signals are obtained; the detection part generates the pulse signals based on the flow in the circulating water path, wherein the pulse signals comprise normal pulse signals, non-pulse signals and abnormal pulse signals; the normal pulse signal is a continuous pulse signal with stable pulse frequency, and the abnormal pulse signal comprises at least one of a pulse signal with fluctuated pulse frequency and a discontinuous pulse signal; when the detection piece generates abnormal pulse signals and no pulse signals, water shortage early warning is sent out. The detection piece can output three different types of pulse signals according to different fluid media, so that a water adding prompt is sent to a user in time, the water quantity of the water cooling system is detected more timely, and the condition that a water pump idles can be avoided to a greater extent.

The application discloses a protection method of a dynamic test circuit based on shunt energy accumulation, and comprises the following steps: experimentally calibrating key model parameters; synchronously collecting multiple physical quantities; real-time temperature correction and current conversion of shunt resistance; parallel calculation of shunt energy accumulation; adaptive generation of dynamic energy threshold; determination of whether to perform narrow pulse trigger shutdown after threshold comparison; event record reporting and conditional reset. The protection system of the dynamic test circuit based on shunt energy accumulation comprises an operation control unit, which is connected with an execution driving unit, a signal sensing unit and a state feedback unit respectively, and the execution driving unit is connected with a measured device. The protection method and system of the dynamic test circuit based on shunt energy accumulation take shunt energy accumulation as a protection criterion and introduce temperature compensation and heat dissipation items, so that the false protection probability caused by normal pulse current in dynamic test can be significantly reduced.

This invention discloses an oscilloscope-based anti-interference algorithm, a computer, and a storage medium based on adaptive threshold and waveform feature matching. The oscilloscope-based anti-interference algorithm includes: if a signal segment simultaneously satisfies the following conditions: its pulse period is higher than a period target threshold, its pulse amplitude is higher than an amplitude target threshold, and its waveform similarity to a standard pulse waveform template is lower than a similarity target threshold, then the signal segment is identified as an interference signal segment; and the interference signal segment is removed and filled with the average value of the normal pulse signal adjacent to the interference signal segment; wherein the period target threshold, the amplitude target threshold, and the similarity target threshold are all dynamic. The beneficial effect of this invention is that it avoids measurement deviations caused by the user speaking or slight upper arm movements, and has a better anti-interference effect.

This invention provides a pulse wave signal processing method and apparatus. The method includes: acquiring and storing raw pulse wave signals; truncating the raw pulse wave signals using a sliding time window function and constructing a fitting function; adjusting the parameters of the sliding time window function and / or the fitting function to make the fitted signal corresponding to each truncated signal segment approximate the signal segment; generating a pulse wave signal set based on the signal segments or the corresponding fitted signals; splicing the signal segments in the pulse wave signal set into signal segments with certain signal characteristics to obtain a target periodic signal set; detecting the signal segments in the target periodic signal set and extracting heart rhythm signal features and signal features between heart rhythm beats as secondary signal features; and determining whether to output a normal pulse wave signal or identify motion artifacts or noise based on the secondary signal features. Using this invention, high-quality pulse wave signals can be extracted under complex interference and large motion conditions.

The invention discloses a protection method of a dynamic test circuit based on shunt energy accumulation. The protection method comprises the following steps: carrying out experimental calibration on key model parameters; synchronously acquiring multiple physical quantities; carrying out real-time temperature correction and current conversion on the resistance value of the shunt; shunt energy cumulant parallel calculation is carried out; a dynamic energy threshold value is generated in a self-adaptive mode; after threshold comparison, whether narrow pulse triggering turn-off is carried out is determined; and event record reporting and conditional resetting. The protection system of the dynamic test circuit based on shunt energy accumulation comprises an operation control unit, the operation control unit is respectively connected with an execution driving unit, a signal sensing unit and a state feedback unit, and the execution driving unit is connected with a tested device. According to the shunt energy accumulation-based dynamic test circuit protection method and system, shunt energy accumulation is taken as a protection criterion, and temperature compensation and heat dissipation items are introduced, so that the error protection probability caused by normal pulse current in a dynamic test can be remarkably reduced.

The application discloses a blood cell volume histogram statistical method, device, medium and equipment, first, local width features and global width features of each pulse signal in a pulse signal set are identified, then, the local width features are screened, a local width threshold of normal pulse signals on the local width features is determined, and a pulse signal set to be corrected is screened from the pulse signal set based on the threshold. Then, the amplitude is filtered and the global width features are screened, the pulse signal set to be corrected is filtered and processed to obtain a corrected pulse signal set, a global width threshold of normal pulse signals on the global width features is determined, and a normal pulse signal set is screened from the pulse signal set to be corrected based on the threshold. In this way, abnormal signals can be screened from the dimensions of the local width features, the global width features and the like, and finally, a volume histogram drawn based on the normal pulse signal set will conform to the morphology of normal distribution, which is beneficial to subsequent calculation of morphological parameters.