140 results about "Wave measure" patented technology

The invention belongs to a marine monitoring system device, particularly relates to marine environment monitoring, wave measurement, signal and information processing, communication and information systems, radar technology and GPS technology, discloses a three-dimensional real-time monitoring system for offshore wave parameters, and provides a necessary means and reliable guarantee for reducing noise interference and monitoring offshore wave parameters. The invention adopts the technical scheme that the three-dimensional real-time monitoring system for the offshore wave parameters consists of a wave buoy, a navigation radar, a shore receiving system, a computer and a display, wherein the wave buoy is used for acquiring wave information of a position and emitting the wave information through radio frequency; the wave buoy comprises a GPS sensor wave-measuring unit and an acceleration sensor wave-measuring unit; the shore receiving system is used for receiving the wave information of the wave buoy and transmitting the wave information to the computer; and the computer is used for data processing and numerical analysis. The system is mainly applied to marine monitoring.

A method for measuring a radio wave propagation environment includes installing radio signal transmission and reception apparatuses where a radio network system is to be constructed and obtaining an electromagnetic wave measured value of a signal between transmission and reception apparatuses; estimating an electromagnetic wave propagation state of the signal using an electrical property and information on a three-dimensional structure at the site to obtain an electromagnetic wave estimated value; making a comparison between measured and estimated values for each time of day to determine when errors between measured and estimated values exceed a reference value; obtaining an electromagnetic path between transmission and reception apparatuses; and modifying structure information in the wave path to re-obtain the estimated value; and comparing the measured re-obtained estimated value to modify the three-dimensional structure information so that the error value becomes smaller.

The invention is an improved guided wave level measurement device. A guided wave measuring device includes a waveguide, a signal generator and a signal receiver, where the signal generator and signal receiver are operationally connected to the waveguide. The improvement included a target which is displaceable with respect to the waveguide and coupled to the waveguide. The target presents a reflective surface and the position of the target is detectable through time of flight measurements of a signal generated by the signal generator.

The invention relates to a novel high precision frequency and amplitude measuring method for steady-state harmonic and / or inter-harmonic component in power system. The method of measuring the power system steady-state harmonic and / or inter-harmonic component comprises two steps: firstly, the number and the approximate frequency of the steady-state harmonic and / or inter-harmonic component which can possibly exist in the voltage waveform and current waveform of the power system are primarily measured through the least square method by using the resolution at 1Hz; and then multiband pass filtering is performed on each signal component to accurately judge the number of the steady-state harmonic and / or inter-harmonic component and to measure the frequency and amplitude of each component. The measuring method can swiftly and accurately measure the frequency and amplitude parameter of the steady-state harmonic and / or inter-harmonic component in the voltage waveform and the current waveform of the power system while not be affected by the frequency fluctuation of the power system(namely, nonsynchronous sampling ), and can improve the efficiency of measuring the steady-state harmonic and / or inter-harmonic and reduce the amount of calculation.

An implantable coronary perfusion monitoring device for in-vivo determination of a coronary perfusion index (CPI) indicative of the coronary perfusion of a heart has a time measurement unit to determine a blood pressure reflection wave measure t indicating the timely position in the heart cycle of the maximum of a reflected blood pressure wave and in a time period starting at a preset point of time in systole and ending at a local maximum of blood pressure following aortic valve closure and, a diastolic peak pressure measurement unit adapted to determine a diastolic peak blood pressure measure DPP related to diastolic aortic peak pressure and a systolic arterial pressure measurement unit adapted to determine a systolic arterial blood pressure measure SAP related to systolic arterial pressure, and a coronary perfusion index calculating unit adapted to determine said coronary perfusion index CPI as (t·DPP) / SAP.

The invention discloses an online oil liquid abrasive particle monitoring device and measuring method. The online oil liquid abrasive particle monitoring device comprises an online multi-electrode chromatography imaging abrasive particle sensor, a photoelectric isolation module, an exciting part circuit, a measuring part circuit, power sources, a signal filtering circuit, an AD (Analog / Digital) conversion circuit and a signal path, wherein the power sources are used by the exciting part circuit and the measuring part circuit, respectively, and the signal path adopts fully differential signal transmission. The measuring method comprises the following steps: pre-processing a software phase wave measuring signal; rebuilding an image model according to a finite element rule; reading a frame induction signal; calculating equipotential line filtering reverse projection to generate a gray image; generating a continuous multi-frame image; calculating the count, sizes and shapes of abrasive practices; generating a multi-frequency gray image and calculating the textures of the abrasive practices; and storing and displaying abrasive particle information which represents the abrasive particle information in oil liquid and the abrasion state of a device. According to the online oil liquid abrasive particle monitoring device and the measuring method, both metallic and non-metallic particles can be measured and the count, sizes, shapes and varieties of the abrasive particles can be quantitatively measured.

The invention provides a calibration test device of a super-high direct current transformer, comprising an alternating current / direct current programmable power supply, a calibration sensor and a data processing and controlling device; the calibration sensor comprises two sensors: a zero-flux sensor and a broadband current sensor; the data processing and controlling device comprises a signal processing unit, an error measurement and calculation unit and a system control unit; the test currents generated by the alternating current / direct current programmable power supply are sequentially accessed in the calibration sensor and the direct current transformer to be calibrated; the output signal of the direct current transformer to be calibrated is transmitted to the signal processing unit; the standard measurement result of the calibration sensor is transmitted to the signal processing unit; the signal processing unit is connected with the error measurement and calculation unit; and the system control unit is connected with the alternating current / direct current programmable power supply. The calibration test device of a super-high direct current transformer used as a calibration measurement system can carry out calibration test on the accuracy of the direct current and harmonic wave measured by the direct current sensor and fills up the blank in the field.

The invention brings forward a harmonic wave measuring and correcting method for capacitor voltage transformers through transformation ratio fitting. The method includes the steps: establishing a consistent equivalent circuit for capacitor voltage transformers with the same voltage level, conducting fitting according to equivalent circuit component parameters of a preset model, obtaining a transformation ratio amplitude-frequency response curve and a phase frequency response characteristic curve, adjusting the curves through a translation method or the like on the basis of a fitting result for different equivalent circuit component parameters of other models, and finally realizing correction. The wideband characteristics of capacitor voltage transformers are taken as standards for the actual transformation ratio of the capacitor voltage transformers, a measurement result of the capacitor voltage transformers is corrected at the harmonic frequency, and the problem that capacitor voltage transformers cannot be applied to harmonic wave measurement is solved. The harmonic wave measuring and correcting method is simple in calculation, exhibits the real-time performance, and enables the application bandwidth of capacitor voltage transformers to be increased.

The invention relates to a GPS buoy wave measuring method and a wave measuring system, wherein GPS satellite signals are received from a plurality of GPS satellites by using a GPS receiver on a single-point GPS wave measuring buoy, carrier frequency variables of the GPS satellite signals are measured based on a Doppler principle, the movement speed of the buoy is calculated, and thus a sea wave spectrum and wave parameters are calculated. The wave measuring method comprises the following steps of GPS satellite signal acquisition, GPS carrier frequency variable extraction, buoy movement speed calculation, and sea wave spectrum and wave parameter calculation. The wave measuring system comprises a sea surface GPS buoy device, and a computer terminal device. The GPS buoy device comprises an antenna, a solar energy plate, a battery, and an acquisition processor. The acquisition processor comprises a GPS reception communication module and a microprocessor. The wave measuring method of the invention is simple, and the wave measuring system is convenient for installation and maintenance; the method and the system have very wide application prospects.

Embodiments are directed towards a wave measuring electronics device that is integrated within a buoy and the buoy is moored in an ocean. The wave measurement device performs a computer-implemented method for estimating wave motion, including receiving 3D sensor data from each of an accelerometer and a gyroscope, determining, an absolute orientation of the buoy based on said 3D sensor data; and estimating, the true earth acceleration of the buoy over a specified time interval.

A method and an apparatus for measuring performance of an electronic device are provided. The apparatus includes an electromagnetic wave measuring device for measuring an actual level of an electromagnetic wave of an electronic device, and an analysis controller for applying a previously stored level change value to the actual level of the electromagnetic wave to compute a measured level of the electromagnetic wave. The method and the apparatus for measuring performance of an electronic device can easily measure an electromagnetic wave level of the electronic device without using a device suggested by an international standard.

A method includes measuring an occurrence frequency of elastic waves generated by cavitations in vascular tissues in vascular plant, before and after a change in water stress to the vascular plant, respectively by an elastic wave reception sensor fixed to an axis of the vascular plant, calculating a change rate of the occurrence frequency, from the occurrence frequency of the elastic wave measured before and after the change, respectively, and determining whether or not an embolism in the vascular tissue arrives at an unrecoverable level of the embolism, from the calculated change rate. And then, one can determine irrigation timing and quantity to the vascular plant, using an index based upon the above-determined result.

The invention discloses an efficient simulation device for partial discharge modes under various faults in a high-voltage switch cabinet. The efficient simulation device mainly comprises an insulation casing, a switch, a partial discharge mode generator, a high-speed power amplification unit, an impulse transmitting antenna and a chargeable battery, wherein the chargeable battery is connected with an external charger through a socket fixed on the insulation casing. The efficient simulation device for the partial discharge modes under the various faults in the high-voltage switch cabinet can simulate an electrical impulse signal generated by partial discharge and an impulse sequence signal corresponding to partial discharge modes of hole, surface, corona and the like, improve examination and evaluation methods of current various geoelectric wave measuring instruments and fill the blank in the aspects of generation of partial discharge signals and identification of defect modes. The casing can resist high voltage, and the total weight of the device is smaller than 500 g, so that the device has the characteristics of convenience in carrying and safety, and the device is particularly suitable for a power enterprise to develop work of a partial discharge study of the high-voltage switch cabinet, examination of a commercial testing instrument, training of worker skills, and the like.

The invention discloses an ocean wave observation buoy which comprises a buoy type wave measuring ball (1), wherein a GPS positioning device is installed in the buoy type wave measuring ball (1) in asealed mode, and a solar cell panel (100) for supplying power to the GPS positioning device is further installed on the surface of the buoy type wave measuring ball (1); the buoy type wave measuring ball (1) can still completely float on the ocean surface under the gravity dragging effect of the balancing weight (5); and a first steel cable (2) is fixedly installed in the center of the bottom of the float type wave measuring ball (1), and the lower end of the first steel cable (2) sequentially penetrates through the suspension ball (3) and the positioning ring (4) to be fixedly connected withthe balancing weight (5) into a whole. The ocean wave observation buoy is simple in structure, can guarantee that the float type wave measuring ball can be accurately reset when the wind is flat and quiet, and can eradicate the phenomenon that the float type wave measuring ball drifts freely, and an observer can accurately find the starting point or the middle point of the float type wave measuring ball.

The invention relates to the technical field of ultrasonic wave flow measurement, in particular to a dynamic measurement method for an ultrasonic wave measuring instrument. The dynamic measurement method comprises steps as follows: (A), a sampling time difference deltat i is obtained after the ith time of circuit sampling is finished; (B), a sampling coefficient lambda i corresponding to the ith time is obtained according to the sampling time difference deltat i and following equations; (C), the condition of sudden change of flow is judged according to the (i-1)th sampling coefficient lambda (i-1) and the ith sampling coefficient lambda i, if jumping change happens, the sampling frequency is adjusted and a step E is started, and otherwise, a step D is started; (D), a sampling time difference filtering average value deltat (average) is obtained through averaging, deviation percentage f of the ith sampling is calculated, and the frequency is adjusted according to the f; (E),the volume Vi of the ith sampling is obtained through calculation. The next sampling frequency is adjusted continuously during flow measuring, and the system measurement precision is guaranteed; meanwhile, the sampling frequency is adjusted constantly, so that the energy consumption of the system is in a reasonable range, and compared with continuous high-frequency sampling, system power consumption is greatly reduced.

An antenna lifting device is provided with an antenna unit and a lifting mechanism which brings up / down the antenna unit in the vertical direction. The antenna unit is provided with an antenna, an antenna supporting mechanism which supports the antenna, and an elevation angle adjusting mechanism configured to adjust the elevation angle of the antenna. The elevation angle adjusting mechanism adjusts the elevation angle of the antenna by rotating the antenna supporting mechanism, and the elevation angle can be adjusted independently from operation of bringing up / down the antenna unit by the lifting mechanism. Since the elevation angle of the antenna can be discretionary adjusted, electromagnetic wave measurement can be performed more accurately.

The invention relates to a wave / tidal test verification system device and application thereof. The wave / tidal test verification system device comprises a core measurement and control system and a key auxiliary mechanism, wherein the core measurement and control system comprises a power system and a measurement and control system; the key auxiliary mechanism comprises a traction auxiliary mechanism, a bearing platform auxiliary mechanism and an isolation auxiliary mechanism; and the measurement and control system is used for monitoring and controlling a system and mutually cooperated with the power system. The wave / tidal test verification system device disclosed by the invention is a novel wave and tidal integral test verification system which completes the verification tasks of a gravity acceleration sensor, a gravity acceleration meter type wave buoy, a pressure-type acoustic-type optical-type wave measuring instrument and a pressure-type acoustic-type float-type tide gauge / water level meter by simulating the movement change rule of waves / tides / water levels by dragging the bearing platform auxiliary mechanism to move at acceleration fitting to a certain change rule in a vertical direction by dint of the traction auxiliary mechanism.

The invention discloses a composite fiber grating sensor and the dual-parameter measurement method of a refractive index and a temperature. A sensor structure comprises a single mode fiber (1) and a single mode fiber core (2). The single mode fiber core (2) is provided with a hybrid grating formed by a long period grating (3) and an inclined grating (4) along a horizontal direction. Incident light(5) is emitted into the hybrid grating, and then emergent light (6) enters into an optical wave measuring system. The wavelength offset of an inclined grating refractive index measurement factor is acquired, and then an actual sensitivity value is obtained through the inversion of a sensitivity coefficient. Then, the actual sensitivity value is used to compensate the wavelength shift caused by arefractive index in the dual-parameter measurement factor of the long period grating, and a measured temperature is acquired, and the dual-parameter measurement of the refractive index and the temperature is realized. Two parameters can be measured simultaneously, the structure is simple, a calculated amount is reduced, and the advantage of the high refractive index sensitivity in a traditional long period grating and the advantage of high temperature sensitivity in the inclined grating are possessed simultaneously.

In a comparison between master data created from a waveform signal of an observed object of an acceptable article and a waveform signal obtained from a non-measured observed object, time phase difference generated in the observed object is corrected, and difference with the master data is detected. As a first stage, quality determination is performed on the non-measured observed object with a long interval master data using the created master data, and the time phase difference is corrected. Then, as a second stage, quality determination is performed with the short interval master data divided on a time axis and the similarly divided waveform signal of the observed object. The time phase difference generated between the observed objects (acceptable article and defective article) is thereby corrected, and quality determination of high accuracy can be performed from the comparison with the waveform signal of the acceptable article.

A technique for effectively detecting abnormal values in electromagnetic wave measurement is provided. An electromagnetic wave measuring device includes a measurement data receiving unit 308, an abnormal value detecting unit 309, and a GUI controlling unit 306. The measurement data receiving unit 308 receives measurement data of electromagnetic waves that are measured at multiple positions. The abnormal value detecting unit 309 detects an abnormal value in the measurement data. The GUI controlling unit 306 displays a position at which the abnormal value is measured, on a display.

A radio anechoic box (1) is formed by arranging a radio wave absorber (3) inside a metallic case (2). An object (5) to be measured and a measuring antenna (6) are arranged apart from each other along an axial direction inside the box (1). The object (5) and the antenna (6) are placed offset from the center (O) of a cross section of the radio anechoic box (1) based on a wavelength lambda of electromagnetic waves in a frequency band where the absorber (3) exhibits lower absorption characteristics. Thus, a plurality of reflection waves traveling from the object (5) to the measuring antenna (6) can be interfered and canceled to reduce influence of the reflection waves.

The invention discloses an ultrasonic wave measuring method for the liquid flowing speed and the flow of a pressure pipeline, relating to the technical field of measurement, and solving the technical problem of low precision for measuring liquid flow by ultrasonic wave. The ultrasonic wave measuring method is characterized in that error influence on measurement precision because the transmission rate of ultrasonic wave in different liquids changes is eliminated with a bidirectional simultaneous measurement method. The measuring method comprises the following steps of: (1) simultaneously measuring the Ti1 and the Ti2 of each sound path; (2) calculating the line mean velocity of each sound path; and (3) carrying out integration to a measured cross section by the flow rate on each sound path to obtain the flow of the measured cross section. The measurement precision can be improved with the measuring method, and the measuring method is suitable for measuring different liquids.

An acoustical wave measuring apparatus capable of achieving an acoustic match even when the shape of a holding member changes largely along a scanning direction of a probe, including a holding member which holds a test object, a probe which receives an acoustical wave, and a sealing member, and the acoustical wave is received by running the probe for scanning with respect to the holding member while an acoustic matching agent for performing acoustic impedance matching between the probe and the holding member is injected into between a receiving surface and the holding member. The sealing member includes a portion with elasticity arranged at the receiving surface of the probe and is biased in a direction which brings the sealing member into contact with the holding member such that the portion contacts the holding member to seal a space between the receiving surface and the holding member.

The invention relates to a terahertz wave measuring device, a measuring method, and a measuring rig. The terahertz wave measuring device includes (1) a terahertz wave generation element that generates a terahertz wave by difference frequency generation based on excitation light that is incident to the terahertz wave generation element, the excitation light including a plurality of different wavelength components and being condensed so as to have a beam diameter of a predetermined size, (2) a structural body through which the terahertz wave is transmitted; and (3) a detector that detects an intensity of the terahertz wave that has been transmitted through the structural body, wherein the structural body includes a sample holder of a predetermined width that holds a sample, and the structural body is in close contact with or is joined to the terahertz wave generation element.

The invention provides a device parameter measurement method and device and terminal equipment. The method comprises the steps of obtaining measured data of a to-be-measured device and an error parameter of a load pull measurement system, wherein the measured data is a voltage wave measured by an internal receiver of a vector network analyzer in the load pull measurement system on the basis of theto-be-measured device; and calculating a parameter of the to-be-measured device by utilizing the measured data and the error parameter of the load pull measurement system. Through obtaining the real-time measured data, measured by the vector network analyzer, of the to-be-measured device, the parameter of the to-be-measured device can be calculated in real time without being influenced by the mechanical repeatability of an impedance tuner, so that the measurement accuracy for the parameter of the to-be-measured device is improved.

The invention discloses a method and a system for measuring a body contour line by millimeter wave perspective and constructing a human three-dimensional image by using the body contour line. The method comprises the following steps: detecting by utilizing millimeter wave perspective and drawing human front and back body contour lines, constructing the measured human three-dimensional image, calculating the size of each part of the human body according to the three-dimensional image, and providing body size data to be recorded for buying and making tailored clothes. According to the method andsystem disclosed by the invention, the detailed body size data of a user can be accurately, rapidly, harmlessly and conveniently measured, the cost is low, and the system belongs to automation equipment which can be universally used.

A photoacoustic wave measuring apparatus, having: a probe including a plurality of devices which detect an acoustic wave generated by irradiating light onto an object; and a signal processor which acquires information about the object on the basis of an acoustic wave received by the devices, wherein the light is irradiated onto the object from the probe side; the probe includes: bright-field devices having a view angle covering a bright-field illumination area, which is an area where the light is irradiated, on the probe-side surface of the object; and dark-field devices having a field of view which does not cover the bright-field illumination area; and the signal processor uses an acoustic wave received by the dark-field devices when acquiring information about the object on the basis of a acoustic wave received before a predetermined time period is elapsed since the irradiation of light onto the object.

The invention discloses a seismic relative wave impedance predicting method and a seismic relative wave impedance predicting apparatus based on frequency domain multi-level differentiations. The method comprises following steps: building a thin interlayer model and obtaining a combined earthquake record based on the thin interlayer model; raising the frequency of the combined earthquake record by different levels of differentiations within a frequency domain and establishing the relationship between the differentiation level of an amplitude spectrum and the main frequency; adding together the differentiation levels of amplitude spectrums to obtain a laminated amplitude spectrum for the combined earthquake record; using a sonic wave measuring method to determine the multi-level differentiation amplitude spectrum from sonic wave impedance spectrum to obtain a corrected laminated amplitude spectrum; combining the three-level differentiation phase spectrum in the combined earthquake record to obtain a wide band frequency spectrum; finally, effectively recognizing the thin interlayer based on the seismic relative wave impedance with high resolution obtained by the wide band frequency spectrum. The technical solutions provided in the invention can effectively increase the resolution of seismic relative wave impedance.