69 results about "Pulse measurement" patented technology

The invention discloses a magnetostriction liquid level meter temperature compensation method and system based on a support vector machine. The method comprises the steps that the currently captured original pulse number is obtained through a magnetostriction liquid level meter; the current environment temperature is detected in real time through a high-precision temperature sensor in the magnetostrictive liquid level meter; taking the original pulse number and the current environment temperature as input features, sending the input features to a pre-trained support vector machine regression model (SVM), and outputting a displacement error prediction value in the current temperature environment; and correcting the original measurement result according to the error prediction value to obtain a real pulse measurement value after temperature compensation. The system comprises a time-to-digital conversion chip, a temperature chip temperature measurement module, a support vector machine reasoning module, a pulse compensation module and a distance calculation module. According to the method, nonlinear modeling can be carried out on measurement errors caused by environment temperature changes, so that the liquid level measurement result is dynamically corrected, and the overall robustness and precision of a measurement system are improved.

The invention discloses a saline water layer CO2 geological storage salting-out quantitative evaluation device and method. The saline water layer CO2 geological storage salting-out quantitative evaluation device comprises a fluid injection system, a rock core reaction system, a confining pressure system, a back pressure system, a pulse measurement system, a drainage system and a data analysis system. The fluid injection system, the confining pressure system, the back pressure system and the liquid drainage system are respectively communicated with the rock core reaction system, and the pulse measurement system and the data analysis system are respectively and electrically connected with the rock core reaction system. According to the embodiment of the invention, the rock core reaction system provides an experiment environment, the fluid injection system provides scCO2 and saline water required by an experiment, the pulse measurement system provides a sound wave signal for a rock sample, and the data analysis system analyzes various data acquired by the experiment and obtains a saline water layer CO2 geological storage salting-out quantitative evaluation result. And a scientific basis is provided for an injection process and storage safety of geological storage of CO2.

The invention discloses a multi-channel phase stability testing device based on a high-bandwidth oscilloscope, and aims to solve the problem that the requirement of pulse type output of quantum bit measurement and control signals cannot be met due to the fact that coherent measurement is carried out on continuous signals through a network analyzer in an existing method. The phase synchronization performance measurement among multi-channel superconducting quantum bit pulse type measurement and control signals is realized by adopting a reverse demodulo coherent calculation method.

The present invention relates to the field of radio frequency measurement technology, and discloses a broadband pulse measurement method based on a vector network analyzer. Aiming at the problem that the device under test cannot withstand long-term high-power signals, a special measurement scheme is designed for the vector network analyzer. The radio frequency source signal is modulated by a pulse switch, and the signal is down-converted to an intermediate frequency after passing through the device under test, and the intermediate frequency is then pulse modulated and filtered. A pulse modulation source is designed for radio frequency and intermediate frequency signal modulation and reception sampling synchronization to ensure that the sampling bandwidth is within the positive pulse width of the pulse period. When sampling, a reference pulse rising edge is introduced to trigger the digital down-conversion working state. After software delay, sampling is performed to achieve synchronization between sampling and intermediate frequency signal, and the results are accurate, stable and fast. In addition, in order to achieve distortion of the intermediate frequency signal link after radio frequency modulation, a modulation signal is introduced to further modulate and improve it. This scheme can effectively measure the amplitude-frequency characteristics, phase and other characteristics of the device under test.

The embodiment of the invention discloses a pulse synchronization method and device based on a microwave detection system, equipment and a medium. The method comprises the following steps: receiving an emission signal of an external radar, and preprocessing the emission signal to obtain amplitude data and phase data; performing pulse measurement on the amplitude data to determine a pulse width, and performing frequency calculation on the phase data to determine a pulse frequency; judging whether the pulse width and the pulse frequency both trigger pulse synchronization processing or not according to a preset pulse parameter range; and if the pulse width, the pulse frequency and the pulse period are triggered, a pulse period is obtained, the pulse width, the pulse frequency and the pulse period are judged through a state machine, and pulse data synchronized with the external radar are determined. By implementing the method provided by the embodiment of the invention, the problem that the microwave detection data of the pulse radar signal cannot be synchronously acquired in the prior art can be solved.

The present application belongs to the technical field of intelligent sensing and pose detection, and provides a precise pose linkage measurement system for underground equipment to solve the natural shielding of GNSS signals in the current underground environment. The preset starting point coordinate information is input into the upper computer, then the running state and basic navigation information of the tunneling equipment are obtained through the track walking pulse measurement device and the inertial navigation device respectively, and the movement amount of the tunneling equipment is collected through the signal transceiver device. When the tunneling equipment stops moving after completing the work, the anchor hoisting machine starts to move and follow, until reaching the preset interval distance, then the ultra-wideband cascade module measures the position change between the tunneling equipment and the preset starting point, the data solving module comprehensively calculates the dead reckoning result based on the above data, and the dead reckoning result is fed back to the upper computer, realizing the real-time detection of the precise pose of the whole tunneling equipment, and still being able to stably collect data in the harsh underground environment.

The application discloses an arterial pulse signal measuring device, which comprises an expansion body, a sensor positioning part and a plurality of sensing components. The expansion body comprises a first expansion area, a second expansion area and a channel area, wherein the channel area connects the first expansion area and the second expansion area, and the length of the first expansion area in the length direction of the expansion body is less than the length of the second expansion area in the length direction of the expansion body. The sensor positioning part is located in the first expansion area, and the length direction of the sensor positioning part is substantially perpendicular to the length direction of the expansion body. The plurality of sensing components are arranged on the sensor positioning part along the length direction of the sensor positioning part. The application can improve the positioning accuracy of the sensing components for human pulse measurement by controlling the first expansion area, the second expansion area and the channel area to have different expansion sizes when inflated.

The utility model discloses a sound diagnosis instrument, relates to medical equipment technical field, the sound diagnosis instrument comprises a housing, a lift drive assembly and a bone conduction acquisition head, the housing is provided with an accommodation space, the housing is provided with a guide via hole communicated with the accommodation space; the lifting driving assembly comprises a lifting transmission part and a lifting driving mechanism which are in transmission connection, the lifting driving mechanism is arranged in the containing space, and the lifting transmission part is arranged in the guide through hole in a penetrating mode; the bone conduction collecting head is arranged outside the shell and corresponds to a collecting position used for placing the wrist of a patient, the upper end of the bone conduction collecting head is connected with the lifting transmission part, and the lower end of the bone conduction collecting head is used for abutting against the wrist of the patient so as to collect pulse data of the wrist of the patient; according to the technical scheme, the accuracy of pulse measurement can be improved.

The invention discloses a method for measuring the driving depth of a drainage plate based on low-voltage pulses, and the method comprises the steps: S1, taking a section of plastic drainage plate with a known actual driving depth, and testing the depth of the plastic drainage plate through a low-voltage pulse instrument; s2, the measured depth is compared with the actual hitting depth, the whole wave speed on the low-voltage pulse instrument is adjusted, and then the low-voltage pulse instrument is calibrated; and S3, measuring the hitting depth of the unknown plastic drainage plate by using the calibrated low-voltage pulse instrument. According to the invention, the depth measurement precision and efficiency of the plastic drainage plate are greatly improved.

The present application relates to the technical field of medical equipment, and discloses a blood pressure monitoring device and a dynamic calibration method thereof, the blood pressure monitoring device comprising: a blood pressure, pulse and sleep measurement module for acquiring blood pressure data, pulse data and sleep data of a patient in real time based on a smart watch; a blood oxygen and pulse measurement module for acquiring blood oxygen data and pulse data of the patient in real time based on a smart ring; a fit degree acquisition module for acquiring a first skin fit degree when the smart watch is worn by the patient and a second skin fit degree when the smart ring is worn by the patient; and a monitoring data correction module for correcting the blood pressure data, blood oxygen data, pulse data and pulse data acquired by the smart watch and the smart ring in real time based on the first skin fit degree and the second skin fit degree, so as to obtain corrected blood pressure data, corrected blood oxygen data, corrected pulse data and corrected sleep data of the patient, thereby ensuring the monitoring accuracy of the blood pressure, blood oxygen, pulse and sleep data.

The invention relates to a pulse measurement method based on two-photon absorption, and the method comprises the following steps: S1, selecting perovskite as a medium, and placing the medium on a sample stage of a Michelson interferometer; s2, the light source emits an ultrashort laser pulse to be measured and divides the ultrashort laser pulse into two paths of pulses, one path of pulse passes through the adjustable delay line and then is combined with the other path of pulse in perovskite, and a two-photon absorption signal is generated; and S3, obtaining a two-photon absorption interference autocorrelation curve IAC experiment through the two paths of pulses and the two-photon absorption signal, and reconstructing to obtain complete information of the to-be-measured ultrashort laser pulse by combining the spectral intensity of the to-be-measured ultrashort laser pulse. According to the invention, multi-photon absorption response is taken as a core detection mechanism, so that the technical limitation of traditional non-linear effects depending on second harmonic generation and the like is effectively broken through, the problem that materials such as perovskite and the like do not have second harmonic so that pulse measurement cannot be realized is solved, and measurement of higher sensitivity and wider wave band of ultrafast light pulses is realized.

A moving image acquisition unit (111) acquires moving image data indicating a moving image of the user's face captured by the user using a camera (16). The acquired moving image data is accumulated in a moving image DB (121) of a memory (12). A pulse measurement unit (112) reads the moving image data from the moving image DB (121), and measures vital values including pulse on the basis of the moving image data. A ratio calculation unit (113) calculates the ratio of sympathetic nerves and parasympathetic nerves on the basis of the pulse included in the measured vital values. An activity calculation unit (114) calculates the activity of the autonomic nerves overall on the basis of the pulse included in the measured vital value. A plotting unit (115) plots the state of the user's nervous system indicated by LF / HF and TP on a plane in which LF / HF and TP are the two axes.

The present application relates to the technical field of optical fiber large current sensor, and discloses a device and method for improving the pulse measurement accuracy of an optical fiber large current sensor.The device comprises a modulation signal generating unit, a step response storage unit, a pulse current storage unit and a convolution decoupling unit.For the problem of pulse measurement waveform distortion of a closed-loop optical fiber sensor, based on the convolution characteristics of a linear system and the non-reciprocal phase modulation technology, a step wave modulation signal is generated by the modulation signal generating unit to obtain the unit impulse response of the sensor, and the convolution decoupling unit is used to correct the pulse measurement result.The device does not need to rely on a large amplitude step current source, retains the original advantages of the optical fiber sensor, significantly improves the pulse current measurement accuracy, simplifies the process, and the result is reliable, and is suitable for pulse large current measurement scenes such as electrical equipment detection.

The pulsation is measured, and the pulse transit time (PTT) is measured by selecting the pulsation at two places where the displacement of the skin is large.SOLUTION: A pulsation measuring device 1 includes a radar device 2 and a signal processing device 3, and the radar device 2 is provided at least at three positions where the skin of a human body H can be scanned and scans the skin at the positions to output radar data as a biological signal. The signal processing device 3 acquires the output radar data, detects the displacement of the skin in the vertical direction at the position of the human body H scanned by the radar device 2 to specify the pulsation of the human body H, selects two places of the biological signal of the human body H where the displacement of the skin of the human body H is large, and calculates the pulse transit time (PTT) between the two places.SELECTED DRAWING: Figure 1

The present application provides an anti-irradiation acquisition method and system for a high-voltage pulse measurement system, belonging to the field of pulse power technology. The method is as follows: Analyze the influence of the parameters of each device in the high-voltage pulse measurement system on the output characteristics of the high-voltage pulse measurement system to identify key devices; input the irradiation sensitivity error allocation ratio function of the key devices into a deep convolutional neural network, and take the minimum comprehensive error of the high-voltage pulse measurement system as the objective function to globally and collaboratively optimize the allocation of the irradiation sensitivity error allocation ratio coefficients of the key devices; aiming at the consistency between the actual and the optimal allocation of the irradiation sensitivity error allocation ratio coefficients of the key devices, perform modular hierarchical redundancy setting on the key devices, and at the same time perform irradiation hierarchical shielding according to the hierarchical redundancy setting of the key devices. The present application can significantly reduce the anti-irradiation setting cost and the volume of the measurement system while meeting the anti-irradiation requirements of the system.

The invention discloses a self-driven multifunctional sensor for an artificial hand wrist. An angle-speed detection mechanism and a pulse measuring ring are integrated; the angle detection mechanism is composed of a first rotor disc, a fixed stator disc and a friction layer, the first rotor disc and the fixed stator disc can rotate relatively, and sine electric signals corresponding to angle changes are output when the wrist bends and stretches based on the friction electrification effect. The speed detection mechanism generates a characteristic cycle electric signal related to the rotating speed through friction between a second rotor disc and a fixed electrode disc with a specific electrode; the pulse measuring ring is integrated on the inner side of the watchband, and the built-in flexible piezoelectric sensing module is tightly attached to the radial artery of the wrist, so that pulse fluctuation can be directly detected; the whole device does not need an external power supply, can generate sensing signals in a self-driven mode through mechanical friction and pulse pressure, and synchronously achieves simultaneous measurement of the wrist angle, the rotating speed and the pulse signals by means of a four-channel high-speed electrical measuring instrument and a multi-channel serial port circuit.

The application provides a method and device for detecting the position of an object. The method comprises: a first device performing pulse measurement on a target object with the assistance of a second device, the pulse measurement being performed by measuring the target object by using two pulse signals; and the first device detecting the position of the target object according to the pulse measurement result. The technical solution provided by the application is beneficial to solving the measurement error caused by range ambiguity in the case of high PRF, improving the accuracy of the obtained object position information, and thus realizing high-precision target positioning.

The utility model provides a kind of monitor capable of displaying pulse breath ratio parameter, including monitor body, still including respiratory data acquisition unit and pulse measurement unit, both are connected with control unit, control unit is connected with display unit in monitor body;Respiratory data acquisition unit is configured to collect the respiratory data of patient, and it is transmitted to control unit after being converted into digital signal, control unit can obtain the respiratory frequency of patient per minute;Pulse measurement unit is configured to be able to collect the pressure signal of patient when measuring pulse, and it is transmitted to control unit after being converted into digital signal, control unit can obtain the pulse number of patient per minute according to pressure signal;Control unit divides the ratio of pulse number per minute by respiratory frequency per minute and transmits to display unit to show, the ratio of pulse number per minute by respiratory frequency per minute is pulse breath ratio parameter. The above-mentioned monitor can display pulse breath ratio parameter on monitor display interface.

The embodiment of the invention provides a microwave measurement device, and belongs to the technical field of microwave measurement. The device comprises a shielding cover plate, wherein the shielding cover plate comprises a cover plate main body, a plurality of beryllium copper elastic sheets and a plurality of conductive silica gel; wherein a plurality of mounting grooves are formed in the cover plate main body, each conductive silica gel is mounted in the corresponding mounting groove, and each beryllium copper elastic sheet is embedded in the corresponding conductive silica gel; a plurality of round holes are formed in the cover plate main body, and the diameter of each round hole is determined according to a preset cut-off frequency; the first box body is adaptively connected with the cover plate main body; and the pulse measurement circuit is arranged in the first box body, and the pulse measurement circuit is used for collecting microwave signals and performing pulse measurement on the microwave signals. According to the embodiment of the invention, the electromagnetic shielding effect of the microwave measurement device can be improved, and the accuracy of microwave signal measurement is improved.

The application discloses a high-precision calibration method of a Rogowski coil for pulse large-current source measurement, and steps are as follows: S1, a adjustable hundred-A-grade precision current test source is built; S2, a Rogowski coil scale factor calibration test system is built; S3, a Rogowski coil scale factor current amplitude is calibrated; S4, a Rogowski coil line scale factor frequency is calibrated; and S5, verification is conducted after the Rogowski coil line scale factor calibration. The application also discloses a device for realizing the high-precision calibration method of the Rogowski coil for pulse large-current source measurement. The application uses a precision small current source to replace a traditional large-power pulse current source as a calibration source, so that the test equipment requirement, test difficulty and test safety can be effectively reduced. The fine calibration method combining the Rogowski coil scale factor current amplitude calibration and the frequency calibration can effectively reduce the influence of amplitude and frequency changes on the measurement precision in pulse measurement. Compared with the traditional calibration, the Rogowski coil calibration precision can be significantly improved.

The present invention relates to a differential signal numerical integration method for pulse measurement; the method solves the problem that the result of direct integration of differential signals is greatly affected by measurement noise; the method specifically comprises the following steps: 1. intercepting the differential signal f(k), k=1, 2, ... N, collected by the differential sensor to obtain the background noise f(m), m=1, 2, ... T, T<(T0 / Δt), where T0 is the triggering time and Δt is the sampling interval; 2. based on the background noise f(m), intercepting the differential signal f(k), k=1, 2, ... N, obtaining the background noise f(m), m=1, 2, ... T, T<(T0 / Δt), wherein T0 is the triggering time and Δt is the sampling interval; 3. (k) is corrected to obtain the corrected differential signal f0(k); Step 3: numerically integrate f0(k) to obtain the integral sequence F(k) corresponding to the differential signal f0(k); Step 4: detrend the sequence F(k) to obtain the sequence F0(k); Step 5: extract the sequence F0(m) from the sequence F0(k), where m=1, 2, ...T, and based on F0(m), correct F0(k) by the following formula to obtain the measured electromagnetic pulse signal E(k).

This invention discloses a device and method for quantitatively assessing CO2 sequestration and salt precipitation in saline aquifers. The device comprises a fluid injection system, a core reaction system, a confining pressure system, a back pressure system, a pulse measurement system, a drainage system, and a data analysis system. The fluid injection system, confining pressure system, back pressure system, and drainage system are all connected to the core reaction system. The pulse measurement system and the data analysis system are electrically connected to the core reaction system. In this embodiment, the core reaction system provides the experimental environment, the fluid injection system provides the required scCO2 and brine, the pulse measurement system provides acoustic signals to the rock sample, and the data analysis system analyzes the collected data to obtain the quantitative assessment results of CO2 sequestration and salt precipitation in saline aquifers, providing a scientific basis for the injection process and sequestration safety of CO2 geological sequestration.

Various embodiments of systems and methods for controlling a pulsed plasma are described herein. Pulse timing parameters (e.g., pulse on time and / or pulse off time) of a plasma generating source can be controlled based on measurement data received from a measurement device to control plasma exposure of a substrate during a sequence of dynamically controlled pulses in a plasma processing chamber. Additionally or alternatively, pulse timing parameters (e.g., pulse on time and / or pulse off time) can be applied to source power, bias power, and / or both based on measurement data received from a measurement device to control plasma exposure of the substrate. Pulse timing changes can be made in a feedforward or feedback manner.

The utility model provides a blood pressure and pulse measuring device, which relates to the technical field of electronic sphygmomanometers, and comprises a rack, an electronic sphygmomanometer is arranged in the rack, a table board is mounted at the upper end of the rack, a display screen is arranged at the upper end of the table board, the output end of the electronic sphygmomanometer is communicated with a blood pressure cuff through an air pipe, and the output end of the blood pressure cuff is communicated with the display screen through an air pipe. The display screen displays the degree of the electronic blood pressure instrument, an adjusting arm is installed at the upper end of the table board, a storage box is installed on the adjusting arm, and a padding component is installed in the blood pressure cuff. The blood pressure cuff is provided with the underlay component which can directly tighten the blood pressure cuff, and then the underlay component is removed to ensure that a certain gap always exists between the blood pressure cuff and an arm to keep the most appropriate tightening degree.

The utility model discloses an adjustable pulse measuring device which comprises a supporting mechanism and a measuring mechanism assembled above the supporting mechanism, the supporting mechanism comprises a base, a measuring seat is fixedly installed on the front side of the top of the base, and a wrist support is fixedly installed on the top of the measuring seat, and the utility model relates to the technical field of pulse measurement. According to the adjustable pulse measuring device, through cooperation of the measuring base and the millimeter wave radar, the wrist of a patient can be supported and limited, the millimeter wave radar can accurately capture tiny vibration, caused by pulses, on the surface of the wrist, and personal errors in traditional contact type measurement are avoided; discomfort caused by physical contact is reduced, measurement work can be carried out on a patient who cannot be directly touched, the wrist direction of a person can be adjusted by means of an annular rod and a holding rod, and the device can be rapidly switched and selected when pulse measurement is carried out through the radial artery and the ulnar artery.

The invention provides a periodic pulse modulation signal calibration device and a measurement method thereof. The device comprises a conventional pulse modulation measurement module and a narrow pulse measurement module. The conventional pulse modulation measurement module is composed of a detector and an oscilloscope and is suitable for measuring pulse modulation signals with the pulse width larger than or equal to 1 s. The narrow pulse modulation measurement module is composed of a peak power probe and a peak power analyzer, and is suitable for pulse width lt; measuring a 1s pulse modulation signal; according to the invention, a conventional pulse modulation signal and a narrow pulse modulation signal can be comprehensively measured at the same time, and accurate measurement requirements of pulse modulation signals in multiple fields such as radars, communication base stations, electronic countermeasure systems and the like can be met; meanwhile, signal characteristics can be carefully captured, key parameters of pulse modulation signals can be accurately measured, meanwhile, the advanced technology and calibration method are adopted, errors are reduced, and the performance of a high-precision scene system is guaranteed.

The invention belongs to the field of pulse measurement, and particularly discloses an acquisition method and system of a field-circuit coupling type standard pulse measurement device, and the method comprises the steps: giving a to-be-measured pulse waveform type and magnetic core data, and constructing an optimization target; establishing constraint conditions including a damping resistance selection criterion, a cut-off frequency of a pulse waveform, a rated power and an ampere-second number; based on the optimization target and the constraint condition, determining an optimization variable and a feasible region thereof; and screening out a final optimization target by adopting the clustering center and the clustering radius of the feasible region, and determining a pulse measurement device. The method comprehensively considers the measurement performance requirement required by the establishment of a standard measurement device, and has good flexibility and engineering application value.

The invention discloses an interference strategy response method for rapid matching of multiple radiation source signals, and the method comprises the steps: receiving a plurality of radiation source signals through radar reconnaissance interference equipment, carrying out the signal sorting of the plurality of radiation source signals to obtain a pulse description word of each radiation source signal, and enabling the pulse description word to comprise a frequency, a pulse width and a repetition cycle; then, pulse description words of each radiation source signal are matched at the same time, and link establishment is completed if matching succeeds; then, matching confirmation is carried out on pulse description words arriving at multiple PRI moments after chain establishment is completed, if matching confirmation succeeds, chain establishment is kept, interference strategy response is carried out on the radiation source signals, and otherwise, the chain establishment is lost if matching fails; according to the method, the pulse description words are subjected to multi-dimensional matching, so that radiation source signals with relatively high signal similarity are distinguished, and the matching accuracy is improved; matching can be completed after signal pulse measurement is completed, the matching speed is high, and interference to own signals is reduced.

The invention belongs to the technical field of non-contact pulse wave and heart rate detection, and particularly relates to a non-contact pulse measurement method and system based on a laser triangulation method. Measuring the length of the arm by using a laser triangulation method, constructing 3D modeling of the arm of the human body according to the obtained length of the arm, and shooting the wrist of the human body by using a high-frame-rate and high-bit-depth camera to obtain a raw picture sequence; selecting a region of interest, and obtaining G channel data in the region of interest; calculating a G channel mean value of each frame to obtain a mean value sequence; enabling the mean value sequence to pass through a band-pass filter to obtain pulse waves; the pulse waves pass through the trained multi-layer perceptron, so that more pulse wave details are recovered; the pulse wave main frequency is obtained through Fourier transform, and therefore the heart rate is obtained; the measured pulse wave and heart rate are displayed to a user through a display screen UI interface. According to the method and the system, the accuracy of non-contact measurement of the pulse wave and the heart rate is improved.

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.