94results about How to "High measurement frequency" patented technology

The invention relates to a pulse laser distance measurement system and method based on waveform time domain registration analysis. The system comprises a software part and a hardware part, wherein the software part comprises a communication software body, a waveform time domain registration analysis algorithm, a multiple echo algorithm and a distance and reflectivity algorithm. The distance measurement method includes the steps that in a control circuit, a control signal is input, and pulses are sent to a laser emitter; if the selected emitter only emits one path of lasers, the lasers are emitted to a beam splitter through a collimating mirror and divided into two beams, one path of the lasers enters a detector a through an optical attenuator, and the other path of the lasers is emitted to a target through a convex lens; if the selected emitter emits two paths of the lasers, one path of the lasers directly enters the detector a, and the other path of the lasers is emitted to the target through the convex lens; target reflection lasers are emitted to a detector b through the convex lens and an optical filter, the detector b converts laser echoes into analog signals, the two paths of analog signals are converted into digital signals on an AD converter through an analog amplification circuit respectively, waveform time domain registration analysis is conducted in an analysis module, and then the distance measurement result is output by the control circuit.

The invention discloses a stable isotopic abundance ratio real-time online monitoring device and a stable isotopic abundance ratio real-time online monitoring method. A wavelength scanning off-axis integrated cavity spectrum technology is utilized for performing precision measurement on isotopic abundance ratio of an object element, and the device comprises a laser device, a laser controller, a signal generator, an angle adjustable prism, a wavemeter, an off-axis integrated cavity, a temperature and pressure controller, a piezoelectric ceramic controller, an off-axis parabolic mirror, a photoelectric detector, a lock-in amplifier and a signal processing system for acquiring A/D (analog/digital) and terminal signals. The method disclosed by the invention is performed on the basis of the off-axis integrated cavity laser absorption spectrum technology and is further combined with wavelength scanning, cavity regulation, temperature, pressure and wavelength precision control technology, so that the stable isotopic abundance ratio real-time online monitoring can be realized, and trace gas concentration and isotopic abundance ratio measurement can be simultaneously performed; furthermore, the preparation of a sample is not required, so that the measurement frequency is greatly improved; and the device has the advantages of simplicity in operation, no need of calibration, almost no drift during a long period of time, good stability, low power, convenience in carrying, mounting and field experiments and large dynamic range.

The invention discloses a multi-scene-oriented intelligent driving autonomous lane change performance test method. The method comprises:firstly, establishing a lane change dynamic model based on a kinematics bicycle model according to motion characteristics in an autonomous lane change process; secondly, conducting filtering estimation on state variables such as the position, the speed and the azimuth angle of the vehicle through an improved unscented Kalman filtering algorithm; and finally, based on accurately recursivevehicle key basic performance parameters, constructing a lane change performance evaluation index system, and quantifying and outputting evaluation indexes of the autonomous lane change performance, including a target gap, distance collision time and doubling yaw stability,so as to realize high-precision and high-frequency measurement and scientific quantitative evaluation of the advantages and disadvantages of the intelligent driving autonomous lane change performance.

The invention provides a ship deformation measurement method based on optical fiber gyro inertia navigation systems. The method comprises the following steps: installing two sets of optical fiber gyro inertia navigation systems in the middle of a ship/warship and at the deck part of a ship head position, building a mathematical model about optical fiber gyro drafting and ship deformation, designing a ship deformation Kalman filter, estimating the static deformation and the dynamic deformation of the ship through the real-time processing of the difference of angular rates sensed by two sets of optical fiber gyros, and realizing the measurement of the ship deformation. The method belongs to an indirect estimation method. Compared with a traditional optical direct measurement method, the ship deformation measurement method has the advantages that the operation is simple and convenient, and the data collection and processing frequency is high. The ship deformation measurement method is suitable for the measurement of the dynamic deformation of the ship, and the precision can reach 30 minutes of arc.

The invention discloses a multi-scene-oriented intelligent driving autonomous lane keeping performance detection method. The method comprises: firstly, introducing a beta spline curve, and establishing a road model oriented to an intelligent driving automobile test scene; secondly, establishing a vehicle motion model based on multi-source information fusion by utilizing an improved strong trackingKalman filtering algorithm, so as to accurately calculate key basic performance parameters of vehicle motion; and finally, based on the road network and the vehicle motion information, quantifying and outputting evaluation indexes of the autonomous lane keeping performance: transverse deviation, yaw stability and path tracking precision. According to the intelligent driving autonomous lane keeping performance detection method, the defects that an existing test method is low in efficiency, poor in adaptability and relatively single in test working condition are overcome, and high-precision andhigh-frequency evaluation of the intelligent driving automobile autonomous lane keeping performance under various test scenes is achieved.

A high frequency broadband amplifier used for piezoresistive dynamic pressure sensor, connected between outlet line of dynamic pressure sensor, including two-stage amplifiers, power filter circuit and signal filter circuit, the first-class amplifier was composed of the instrument amplifier, its input and negative feedback ends connect the two differential output end of the sensor; the second-class amplifier was composed of high-speed operational amplifier, its input end connect the output end of the instrument amplifier; the power filter circuit were positive or negative, individually parallel connect two electrolytic capacitors or two ceramic capacitors with the earth; the signal filter circuit was self-made band-pass filter consisted by three Y connected inductions, one induction concatenate the high-frequency ceramic capacitor, then connect with the outlet end of the operational amplifier, the other one parallel connect the high-frequency ceramic capacitor, then connect the earth; the last one was took as the outlet end of the amplifier after first connected in series the high-frequency ceramic capacitor. This invention is of high frequency, low noise, with fast rise speed, and anti-interference.

The invention discloses a measurement processing method and a device, user equipment of communication events, wherein the method includes the steps of detecting UPH information and SNPL information of user equipment, responding that the detected a UPH value is less than a preset UPH threshold value, and/or a detected SNPL value is less than a preset SNPL threshold value, shortening a preset measurement cycle into the smaller preset measurement cycle, and measuring reported events; responding that measured results of the measured report events can meet triggering conditions of the corresponding measured report events in preset time, and not launching any measured reported message of the measured reported events in the preset time, and reporting the measured reported message of the corresponding measured report events to network equipment, wherein the preset time is less than the triggering time of the reported condition parameters representing the measured report events. When user equipment (UE) services is low in performance, and large in interference of communication systems of adjacent plots, a switch process can be started as soon as possible, service interruption probability and call drop rate are reduced, and the quality of the service is improved.

The invention discloses a dual-card dual-LTE terminal measurement method and device, a storage medium and a terminal. The dual-card dual-LTE terminal comprises a first identity identification card anda second identity identification card, the measurement method comprises the following steps: receiving configuration information of a network, wherein the configuration information comprises a measurement frequency point; based on the configuration information, determining the number of first virtual frequency points of the first identity identification card and the number of second virtual frequency points of the second identity identification card; based on the number of the first virtual frequency points and the number of the second virtual frequency points, allocating resources for measurement to the first identity identification card and the second identity identification card; and measuring each measurement frequency point according to the distribution result to obtain a measurementresult. Through the technical scheme provided by the invention, resource allocation for measurement of the terminals in the connected state and the idle state can be optimized, the measurement performance and the mobility performance of the terminals are improved, and the standby power consumption of the terminals is reduced.

The invention discloses a suspended type fiber grating vibration sensor, which comprises a shell, a signal transmission fiber, a protecting sleeve, a fiber grating and a vibrator, wherein the shell comprises a hollow bolt and a cylindrical protecting shell, the signal transmission fiber and the protecting sleeve coated out of the signal transmission fiber are stuck at the hollow top end of the hollow bolt through a colloid, the fiber grating is arranged on the lower end of the signal transmission fiber, a layer of an elastic polymer material is coated out of the fiber grating, and the lower part of the fiber grating is connected with the vibrator through a spring; the vibrator is suspended in the sensor through the spring and is coaxial to the fiber grating; and silicon oil is filled in an inner space of the sensor shell. According to the invention, by adopting a suspended structure, the measuring frequency of the sensor is greatly improved without a limit of inherent frequency of a mechanical structure attached on the fiber grating; the measuring stability can be improved by damping liquid in the suspended type fiber grating vibration sensor; the suspended type fiber grating vibration sensor is based on full optical signal design, and has the advantages of good stability, electromagnetic interference resistance, good waterproof property and convenience for realizing quasi-distributed multi-point real-time monitoring.

The present invention relates to a lightning arrester leakage current circuit device and working method. Said circuit device has receiving equipment connected with ground terminal of tested lightning arrester set between high voltage phase conductors with earth, transmitting device hung on above-mentioned high voltage phase conductors and radio fitted with said receiving equipment, transmitting device transmitting high-frequency signal loaded with high voltage phase conductors voltage phase signal, receiving equipment receiving said signal through radio mode, and receiving connected lightning arrester leakage total current signal through cable mode, through relevant processing to obtain resistance current value in leakage total current signal, finally displaying said current value to user.

The invention discloses a pulverized coal flow online measuring device and measuring method. The device is characterized in that a measuring pipe is connected to a primary air pipeline in series and is made of a ceramic material; the two ends of the measuring pipe are each provided with two sets of capacitance sensors; the capacitance sensors are 2n electrode plates annularly and evenly distributed on the outer wall of the measuring pipe, and the 2n electrode plates are n plate capacitors oppositely arranged in pairs; capacitance of the plate capacitors serves as an output signal of the measuring device. Interval measurement of the plate capacitors is adopted, measurement errors caused due to uneven spatial distribution of pulverized coal concentration and speed are effectively reduced, and measuring precision is improved. By means of the measuring device, adjustment can be carried out in time according to data of pulverized coal flow online measuring, so that the problem that burning of the primary air pipeline, overheat of a heated face, slagging, thermal deviation and the like are caused due to pipeline pulverized coal accumulation, pulverized coal pipeline blocking and unbalance of pulverized coal distribution is avoided, and boiler combustion is optimized.

The invention relates to a method and a measuring device for automatically measuring water-level variation, which utilize the principles of communicating vessels and use the water level in a piezometer tube to substitute for the water level of a position to be measured; two metal wires are arranged in the piezometer tube at equal interval, according to the physical conductive properties of medium, a relation curve of the water level and the conductive value can be obtained; and by measuring the conductive value of the piezometer tube and combining the obtained relation of the water level and the conductive value, the height of the water level can be figured out. The data of the conductive value is measured by a high-precision conductive detection system, the conductive data is automatically acquired via a data acquisition system and is transferred to a microcomputer, by measuring the conductive value changing with time to monitor the variation of the water level data and according to the method and the device provided by the invention, the water level data can be conveniently and accurately obtained, and the variation condition of the water level can be real-timely monitored.

The invention discloses a transformer online monitoring device and a transformer online monitoring method based on instantaneous acceleration characteristics. The device comprises an instantaneous acceleration characteristics measurement module, a signal conditioning and acquisition module and a digital processing and analyzing module; the instantaneous acceleration characteristics measurement module is connected with the signal conditioning and acquisition module, and the signal conditioning and acquisition module is connected with the digital processing and analyzing module. With the methodand the device provided by the invention, instantaneous acceleration characteristics information of a plurality of measurement points of a transformer oil tank main body is obtained in real time, an action acceleration value representing vibration amplitude of the transformer main body is calculated, and by comparison with an over vibration threshold value and a quasi over vibration threshold value, whether the measured transformer has main body abnormal over vibration is judged. The device provided by the invention is independent from a power network, and has the advantages of being simple and easy to realize, reliable and accurate, and so on. Application of the method and the device provided by the invention is helpful for transformer operating workers to accurately and reliably acquireinstantaneous acceleration data of the transformer main body in real time.

The invention discloses a transformer monitoring device based on non electrical quantity comprehensive characteristic information and a monitoring method. The transformer monitoring device comprises atransient oil pressure characteristic quantity measuring module, a transient oil flow characteristic quantity measuring module, a transient acceleration characteristic quantity measuring module, a signal conditioning and collecting module and a digital processing analysis module, wherein the transient oil pressure characteristic quantity measuring module, the transient oil flow characteristic quantity measuring module and the transient acceleration characteristic quantity measuring module are connected with the signal conditioning and collecting module respectively; and the signal conditioning and collecting module is connected with the digital processing analysis module. The action oil pressure value, action oil flow value and action acceleration value for representing the operating state of a transformer are calculated by comprehensively using a plurality of non electrical quantity transient characteristic information inside the transformer, and through comparison with preset non electrical quantity starting, warning and a pre-warning threshold, real-time monitoring and reliable evaluation for each non electrical quantity safety level inside the transformer are realized. The device is independent from a power network, and has the advantages of simple composition, easy realization, reliability, accuracy and the like.

The invention provides a device for recording air velocity field information and a method thereof. The device comprises a light source system, a bubble generator, a synchronization controller and at least two color cameras. The light source system comprises continuous light sources and pulse light sequence light sources which irradiate according to a preset pulse flashing interval and the pulse color change order. The continuous light sources provide lighting for a test area. The pulse light sequence light sources provide pulse light irradiation for the test area. The bubble generator discharges tracing bubbles of neutral buoyancy to the air of the test area. The color cameras synchronously acquire color images recording the moving tracks of the tracing bubbles. The synchronization controller realizes synchronization of the pulse light sequence light sources and the color cameras, wherein the exposure time of the color cameras is greater than the preset pulse flashing interval of the pulse light sequence light sources. The requirements for the test environment and camera configuration are low so that the accuracy of the measurement result can be guaranteed and the design cost can be reduced.

The invention discloses an online monitoring device and method for a power transformer on the basis of transient oil flow characteristics. The online monitoring device comprises a transient oil flow characteristic quantity measurement module, a signal conditioning and collecting module and a digital processing and analyzing module, wherein the transient oil flow characteristic quantity measurementmodule and the signal conditioning and collecting module are connected, and the signal conditioning and collecting module and the digital processing and analyzing module are connected. By use of thedevice, transient oil flow characteristic information in a transformer oil conservator connecting pipe is obtained in real time, and an action oil flow value which represents oil flow flowing intensity is calculated and is compared with a preset overcurrent threshold value and a quasi-overcurrent threshold value to judge whether the tested transformer is subjected to exceptional overcurrent or not. The device is independent of a power network and has the advantages of being simple in composition, easy in implementation, reliable, accurate and the like.

The invention relates to a magnetostriction sensor used for displacement measurement and liquid level measurement. A measurement module of the sensor comprises n measurement units, wherein n is a natural number larger than or equal to 2. The measurement units adopt arbitration mechanisms such as FIFO, token circulation and polling, one idle measurement unit obtains the measurement right each time, another idle measurement unit starts measurement of next time before echoes corresponding to the idle measurement unit return, and the activated measurement units successively obtain echo signals according to the starting sequence. The highest measuring frequency of the magnetostriction sensor is k times that of an original design product, wherein k is a natural number larger than 1.

The invention discloses a device and method for measuring the rocket fuel liquid oxygen liquid level through laser ranging. The device comprises a control module which is used for transmitting a lasertriggering signal through a data communication module, and updating the liquid level information in real time according to the liquid level height; a laser sensing probe which is used for emitting measurement laser, and transmitting the reflected laser to a data acquisition and processing module; a reflection floating plate which is used for reflecting the measurement laser and outputting the reflected laser; a data acquisition and processing module which is used for recording initial data information and analyzing the reflected laser to obtain measurement data information; and a data communication module which is used for calculating the liquid level height according to the initial data information and the measurement data information. The problems that a traditional rocket low-temperature fuel liquid oxygen liquid level monitoring scheme is affected by low temperature, capacitance dielectric constant, in-tank pressure intensity, electromagnetic wave interference and the like, so that measurement precision is low, the range is small, reliability is poor, the safety coefficient is low, and installation is complex are solved.