47results about How to "Increase the number of measurements" patented technology

The invention relates to a power transmission line parameter online measurement method based on fault wave recording, which is characterized by comprising the steps: GPS clocks of wave recording devices are utilized for carrying out integral hour startup to obtain positive sequence voltage and current at two ends of a line and the voltage and the current are saved in the wave recording devices at two ends in the form of wave recording files respectively; when the double-circuit line with mutual inductance has an earth fault outside a region, the zero sequence current generated by the fault is utilized for simultaneously starting the wave recording devices at two ends of the line, the synchronous sampling of the zero sequence voltage and the current at two ends of the line in the region is carried out, and a zero sequence sensitive II segment startup element is further equipped; and a central dispatching computer reads the positive sequence voltage and the current values at the two ends and measures the positive sequence parameters of the line. The zero sequence voltage and the current values at two ends are read, thereby measuring the zero sequence parameters of the line. The method does not need to cut off the power, the operation is convenient, and the wave recording devices can be used for the power transmisison line parameter online measurment, thereby making up for the defects of non-synchronous problem when measuring the positive sequence parameters and no zero sequence power supply when measuring the zero sequence parameters by using the prior online measurment device, and improving the line parameter measurment times and the measurement precision.

The invention provides an optical detection and measurement radar with multiple sensors in order to solve the problems that by means of an optical detection and measurement radar, the number of scanning times of measuring obstacles is not sufficient and the ranging accuracy is limited. The radar comprises a rotary shell, a base, two or more infrared light emission modules, two or more electro-optical ranging units, a rotary drive motor, a slide ring and a corresponding drive circuit, wherein the rotary shell rotates relative to the base, the infrared light emission modules are fixed into the rotary shell and emit infrared detection light, the electro-optical ranging units are fixed into the rotary shell, each electro-optical ranging unit comprises an electro-optical sensor for converting received infrared light signals into electric signals, and the rotary drive motor is used for driving the rotary shell to rotate at a constant speed. By designing the two or more sensors, compared with the optical detection and measurement radar with a single sensor, the number of measurement times within a single measurement cycle is increased, and the ranging accuracy is improved.

The invention provides a satellite high-precision angle measurement method based on a photoelectric auto-collimator. The method comprises the following steps: 1) placing a satellite fixed support on a rotation bench, a state is labeled as a state I; 2) employing two auto-collimators for respectively aiming at cubic mirrors on two single machines, adjusting the position of the auto-collimators so that the a measurement optical path by the auto-collimators are perpendicular to the corresponding detected cubic mirrors; 3) rotating the rotation bench to a minimal angle by winding a rotation shaft; and 4) obtaining the angle deflection amount of the detected mirror surface of the cubic mirrors on two single machines, and calculating the image point coordinates of the auto-collimators on a sensor screen. According to the invention, space minimal angle change of the detected mirror surface can be automatically obtained by several auto-collimators, under the prerequisite that the ultrahigh precision measurement capability of the photoelectric auto-collimator is used, measurement error due to manual operation can be avoided, satellite angle measurement precision is increased for further, and the angle measurement method has the advantages of multitime measurement, fast calculating and high measurement precision.

The invention discloses a multi-light source phase sensitive light time domain reflectometer and a method thereof. The reflectometer includes a plurality of lasers, multiple first couplers, multiple second couplers and multiple photodetectors. Continuous light emitted from the different lasers are different in wavelengths. The continuous light emitted from the lasers is shunted through the first couplers to the second couplers and a wavelength division multiplexing modulation module. The wavelength division multiplexing modulation module modulates the multi-channel continuous light into pulsedlight, combines the pulsed light into one channel light, outputs the one channel light to a fiber amplifier, and then outputs the amplified light to a three-port circulator. A second wavelength division multiplexer inputs backward Rayleigh scattering light of different wavelengths to the second couplers with the same wavelength continuous light for interference. The photodetectors convert the multi-channel interference light signals into electric signals and transmit the signals to a data collector and a control analysis module to obtain sensing information of a fiber. Through adoption of theplurality of lasers different in wavelength and the plurality of photodetectors, the anti-polarization fading characteristics of the system are improved.

The invention discloses a signal measurement method and a signal measurement apparatus, belonging to the technical field of communication. The method comprises steps: acquiring a to-be-measured cell list, wherein the to-be-measured cell list comprises access technology type, cell frequency points and cell identifiers of at least one to-be-measured cell, wherein the at least one to-be-measured cell is a dissimilar frequency cell or a dissimilar system cell of the cell where user equipment UE is; within a timing period, judging whether the UE is in a static state; if the UE is in the static state, calculating priority of each to-be-measured cell; and according to the priority of each to-be-measured cell, within each measurement interval contained in the timing period, measuring signals of the cells with the highest priority of a first number. By means of measuring the signals of the first to-be-measured cells including a plurality of cells within each measurement interval contained in the timing period, times of measuring the to-be-measured cells are increased, measurement accuracy is improved, moreover, measurement for all the to-be-measured cells is completed within relatively less measurement intervals, and power consumption is reduced.

The invention relates to a Brillouin Optical Time Domain Analysis (BOTDA)-based sensing device and method. The device comprises a supercontinuum source, three tunable light filters, three 1x2 opticalfiber couplers, two polarization controllers, two high-speed electrooptical modulators, a microwave signal source, three light amplifiers, a light scrambler, an optoisolator, a sensing optical fiber,an optical circulator, a pulse generator, three photoelectric detectors, a data acquisition card and a computer. The BOTDA-based sensing device can enlarge the dynamic range of BOTDA, prolongs a measuring distance of an optical fiber and improves the spatial resolution of the system; furthermore, the device detects optical signals in opposite directions, which solves the problems that the power isgradually lost and the detection range is limited for a traditional BOTDA single-channel signal with the prolonging of the distance of the optical fiber; by the adoption of the supercontinuum source,the device has a spectral range wider than that of a tunable laser device, and can cooperate with the light filters to generate tunable laser with adjustable wavelengths and changeable spatial resolutions; and the supercontinuum source is used as a pump light source in the device, so as to solve the problem of a limited measuring distance of a narrow-band laser device and enhance the stability ofthe system.

The invention discloses a three-dimensional oblique photogrammetry system for surveying, relates to the technical field of oblique photogrammetry, solves the technical problem of low measurement efficiency caused by incapability of performing feasibility analysis on a measurement area in the prior art, and judges whether each sub-area is suitable for oblique photogrammetry or not through environment analysis, the problems that the damage rate of oblique photogrammetry flight equipment is increased, the measurement cost is increased and the measurement progress of a survey area is influenced due to the fact that the environment in the sub-area is not suitable for measurement are prevented; the cost performance of the flight route is judged and measured, equipment faults caused by the flight route are reduced, and the accuracy of measurement is improved; the accuracy of constructing the three-dimensional model is judged and measured, the low measurement precision is prevented, the measurement times are increased, the accident risk is increased, and the measurement cost is increased at the same time; flight equipment for real-time measurement is reasonably deployed, the measurement accuracy is improved, and the situation that measurement is inaccurate and cannot be adjusted in time, and consequently the measurement efficiency is reduced is avoided.

The invention discloses a different frequency measurement method and device based on carrier aggregation, a storage medium and a terminal. The different frequency measurement method comprises the following steps: determining a to-be-measured pilot frequency point; and measuring the pilot frequency point by using the main carrier wave and the auxiliary carrier wave. Through the technical scheme provided by the invention, the pilot frequency measurement times can be increased, and the pilot frequency measurement accuracy is improved, so that the mobile performance of the user equipment is enhanced, and user experience is improved.

The invention discloses a three-dimensional data generation method of railway lines for an RTG automatic walking system, an RTG is controlled to walk along railway lines of a site to collect positioning information in real time; a horizontal position of the railway line and a height difference between the railway lines on both sides are generated by using the positioning information; and real-timedeformation monitoring is performed on the site. Compared with the prior art, the three-dimensional data generation method disclosed by the invention has the active effects that no additional calibration equipment is needed, the measurement efficiency is high, the measurement accuracy is better, and site deformation can be monitored in real time.

The invention provides a radio resource management RRM measurement method and device, and the method comprises the steps: carrying out the RRM measurement in an activation period of at least one discontinuous reception DRX period indicated by network device to sleep in an RRM measurement period. The RRM measurement is carried out in the activation period of the at least one DRX period indicated tosleep by the network device, and compared with the prior art, the RRM measurement frequency in the RRM measurement period can be increased, so that the measurement precision of the RRM measurement isimproved. According to the invention, the RRM measurement frequency in the RRM measurement period can be increased, so that the RRM measurement precision can be improved.

The invention provides an ultrasonic flowmeter; the ultrasonic flowmeter measures the flux of the fluid which passes by a conduit by detecting the difference of travel time between a forward travel time that the ultrasonic travels in the forward direction in the conduit and a backward travel time that the ultrasonic travels in the backward direction in the conduit; the forward ultrasonic signal and the backward ultrasonic signal generated by an ultrasonic vibration element are sampled, thus working out the forward digital data sequence x and the backward digital data sequence y; x and y are memorized in a memory; the forward digital data sequence x and the backward digital data sequence y are read out through a first memory and a second memory; the sum of the absolute difference value of the forward digital data sequence x and the backward digital data sequence y is calculated; simultaneously, the data position of the forward digital data sequence x and the backward digital data sequence y are relatively offset; the offset quantity of the data position where the sum of the absolute difference value is minimum is detected; the travel time difference of the ultrasonic is calculated according to the detected offset quantity of the data position, thus working out the flowing speed of the fluid in the conduit according to the travel time difference of the ultrasonic; furthermore, the flux of the fluid which passes by the conduit is worked out according to the flowing speed and the known cross-section area of the conduit.

The invention discloses a novel tipping bucket type crude oil metering system. The novel tipping bucket type crude oil metering system comprises a liquid-gas separation tank and a metering tank. An input pipe, a gas outflow pipe and an oil outflow pipe are connected to the liquid-gas separation tank. A first bi-pass ball valve is arranged on the input pipe. A gas flow meter is arranged on the gas outflow pipe. A first thermometer, a second bi-pass ball valve, a first check valve and a third bi-pass ball valve are sequentially arranged on the oil outflow pipe. The oil outflow pipe is connected with the metering tank through a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline. The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are sequentially arranged on the portion, between the first thermometer and the second bi-pass ball valve, of the oil outflow pipe. The novel tipping bucket type crude oil metering system has the advantages that the oil-gas separation effect is good, and no impact phenomenon exists; the metering time is shortened, and the metering frequency is increased.

The invention discloses a spectral acquisition method for improving a Raman spectral signal-to-noise ratio, which relates to a spectral acquisition method. The method comprises steps: 1) spectrometerarray background noise SA is acquired; 2) an integral time spectral signal set of a series of microcells is measured; and 3) differential projection and inverse differential calculation are carried out to acquire a sample true spectrum Ss. Through shortening cell integral time, the measurement times in a fixed measurement time are increased; and the more sampling times are beneficial to reduce SG,the occurrence probability of SE is reduced, and through eliminating an abnormal unit, the influences of the SE are eliminated. The reduced cells S are accumulated, an SR response with a high signal-to-noise ratio under a fixed time is obtained, the SG amplitude is proportional to the square root of the cumulative times, and the SG is suppressed. The Raman spectral signal-to-noise ratio can be improved, the linear response of an instrument is improved, the cost of the instrument is reduced, the acquisition efficiency and the operation flexibility are improved, the burr on a baseline is eliminated significantly, and the cost performance of the instrument is improved.

The invention discloses a spectrum confocal scanning displacement sensor device and a use method thereof, and the device is sequentially provided with a multispectral light source, a first collimating lens group, a spectroscope, a first focusing lens group, an illumination pinhole, a second collimating lens group, a dispersion focusing lens group and a displacement platform along an incident optical axis. The first focusing lens group and the illumination pinhole are oppositely and fixedly arranged. The outer side of the first focusing lens group or the illumination pinhole is connected with a driving control piece used for controlling the first focusing lens group and the illumination pinhole to move axially, and focal plane movement of the dispersion focusing lens group is changed through axial movement, so that multiple times of measurement scanning are obtained, and the axial spectral characteristic of a measured value can be analyzed. The measuring precision is effectively improved, the measured panel is adjusted and moved in cooperation with the displacement platform, the surface type or the thickness of the measured panel is measured in a non-contact mode, and therefore the device has the advantages of being scientific and reasonable in design structure, accurate in measurement, economical in manufacturing cost, convenient and fast to use and operate and efficient.

The invention discloses a ferromagnetic material defect detection system based on ultrasonic and magnetic flux leakage. The system is composed of a sensor, a host computer, a computer, a data uploading line, a motor, wheels, a support plate, a frame, a through hole, coils, a U-shaped magnetic core, driving wheels, an N-pole electromagnetic ultrasonic coil, an S-pole electromagnetic ultrasonic coil, a Hall element, an electronic potting sealant, sensor holders, a power amplifier, a sinusoidal signal generator, a 220v/5v power source, a heat blowing fan, a signal acquisition card, a power adjustment knob, and a 220v/15v transformer coil. According to the detection system, magnetic flux leakage is adopted to perform detection; a part where an alarm is generated is marked; after the initial condition of a ferromagnetic pressure-bearing device is understood, an ultrasonic detection technology, that is, the electromagnetic ultrasonic coils, are used to accurately judge an alarm part; the safety status of the ferromagnetic pressure-bearing device can be judged; and the blindness of ultrasonic thickness measurement-based defect detection can be avoided. The system has a high practical value and bright application prospect.