140 results about "Wave measure" patented technology

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.

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 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.

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.

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.

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.

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.

The invention discloses a method and system for measuring human body outlines by using millimeter-wave perspective and constructing a three-dimensional image of the human body; using millimeter-wave perspective to detect and draw the contour lines of the front and side of the human body, and then constructing the three-dimensional image of the measured human body, and then using This three-dimensional image calculates the size of each part of the human body, so as to provide body size data entry for tailor-made clothing and clothing making. The invention can accurately, quickly, harmlessly and conveniently measure the user's detailed body size data without taking off the clothes of the person, and the cost is not high, which belongs to a kind of automatic equipment that can be widely used.

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.