2585 results about "Field tests" patented technology

The invention relates to a welding track detection and control method of plate butt weld based on laser ranging, including the following steps: A. track detection is carried out; B. track identification and extraction are carried out; C. track control is carried out; D. the relative position relation between a welding gun and a welding seam is adjusted at last by performing mechanism actions. In the invention, the information of welding seam profile is obtained by transverse scanning of a laser sensor, and welding seam is rebuilt after effective wave filtering treatment to realize three-dimensional detection of the welding seam; simultaneously, the welding track curve is obtained by fit while detecting welding seam by using dynamic B spline fit algorithm, and the track control is carried out in combination with constant speed B spline track interpolation algorithm, thereby fundamentally solving the problem of track detection and control in automatic welding of plate butt weld. By using the method in the invention, the field test welding has welding profile identification precision of 0.15mm and welding track identification precision of 0.2mm, and the welding speed is more than four times of common manual welding.

The invention relates to a fatigue life prediction system for a vehicle body structure of a vehicle in the technical field of vehicle design. The prediction system adopts a road spectrum fitting module to establish a combined road spectrum suitable for a field test; a vehicle body loading spectrum acquisition module is adopted to establish an entire vehicle multi-body rigid-flexible coupled model so as to extract the load-time-history at a connecting passage of the vehicle body and a chassis as the input of vehicle body excitation; an automobile body structure dynamic response analysis module is adopted to establish a finite element model of the vehicle body so as to obtain the static stress history generated by gravity and the dynamic stress history generated by road surface excitation of the vehicle body when the vehicle is under the excitation of the combined road spectrum; a dangerous position identifying module of low fatigue life of the vehicle body is adopted to quickly search dangerous positions of low fatigue life through an S-N method and a Miner linear accumulated damage model, and determine the multiaxial stress state of the dangerous positions by using 'biaxiality' analysis; and a fatigue life prediction module of the vehicle body structure is adopted to predict the fatigue lives of the dangerous positions accurately. The fatigue life prediction system for the vehicle body structure can improve the speed and the precision of the fatigue life prediction for the vehicle body structure so as to provide a reference for a real vehicle test.

A direct shear tester for both portable field test and indoor test and a sampling and testing method are provided. The tester comprises a sampling device, a portable vertical load system and a horizontal shear system. The testing method comprises burying a rigid frame together with a cruciform shear frame in the soil of a place to be test, digging out the whole soil containing the rigid frame and the cruciform shear frame to obtain an integrated sample with less interference, placing and fixing the integrated sample in a rigid frame base on a box-shaped frame, applying a vertical force by using the portable vertical load system on the box-shaped frame, and measuring the strength of the sample by using the shear frame. During the test process, the volume change of the sample in the vertical direction is not limited. The tester has simple structure, easy operation and good portability. The testing method employs flexible tension shear mode instead of the rigid top-bunt shear mode, overcomes the friction and sampling problems, and avoids the vertical pressure offset during the test process by using the portable vertical loading system, thereby increasing the test accuracy.

Hundreds of thousands of concrete bridges, buildings etc. and hundreds of billions of tons of concrete require characterization throughout the process from manufacture to pouring and curing and on throughout service life. The characterization may relate to initial concrete properties, projected concrete properties, framework removal, corrosion, failure etc. Accordingly, a variety of measurements such as water content, electrical resistivity, and half-cell corrosion potential for example would be beneficially implemented as easy to use field test equipment or embedded sensors allowing lifetime monitoring to be performed rather than discrete assessments when issues become evident.

The high-accuracy synchronous phasor measurement method belongs to the field of automatic measurement technology of power system. On the basis of spaced sampling circulation DFT, when the system frequency is deviated from rated frequency, the influence of frequency deviation can be calculated to make the frequency and phasor measurement have higher accuracy. The field tests show that when the sampling frequency is 4800 Hz and phasor correction calculation frequency is 200 Hz, its static accuracy indexes are: phasor magnitude error is less than 0.5%, phasor phase angle error is less than 1 deg.C and frequency calculation error is less than 0.01 Hz, and its dynamic accuracy indexes are: phosar magnitude error is less than 1%, phasor phase angle error is less than 1 deg. and frequency calculation error is less than 0.01 Hz.

This invention discloses one parking field test system, which comprises the following parts: earth car bit label, wireless image sensor to catch car position, central computer process system, car position status display system, parking guide system and car position management software system, wherein, the sensor receives car label status to send to central computer process system to get car position occupancy information for parking guide system, car position display system.

The invention discloses a microbial enhanced oil recovering method of a moderate-high permeability reservoir. The method particularly comprises the following steps of carrying out field sampling on a tested oil reservoir; analyzing function microorganisms in the oil reservoir and screening an endogenesis activator; screening exogenous function microorganisms; optimizing field injection process parameters; carrying out field implementation and effect tracking and evaluating. The microbial enhanced oil recovering method has the advantages of being wide in oil reservoir range and high in pertinence and operability. The endogenesis activator or the exogenous function microorganisms are selected according to the specific oil reservoir, field injection process parameters are optimized by utilizing physical simulation experiments, the field test effect is obvious, and the accuracy and practically of the process parameter optimizing result are improved by combination physical simulation and field tests, so that the field implementation effect of displacement of reservoir oil through the microorganisms is improved. Therefore, the microbial enhanced oil recovering method of the medium-high permeability oil reservoir can be widely applied to the field tests for enhancing the oil recovery of the medium-high permeability oil reservoir.

The invention discloses a characteristic testing system of a semiconductor laser, comprising a semiconductor laser driver, three-dimensional parallel guide rails, a laser temperature control module, an LIV (power-current-voltage) and spectrum test module, a polarization test module, a near-field light spot test module, a near-field nonlinear test module, a far-field test module, a space spectrum test module and a center software processing module. Working modules can be selected according to needs simultaneously. The characteristic testing system is used for high-accuracy and automation test of the semiconductor laser, especially for a high-power semiconductor laser, so that the cost for detection and manufacture of the semiconductor laser is reduced.

The invention discloses a testing device and a testing method for a three-dimensional PIV (Particle Image Velocimetry) internal flow field testing system of a hydraulic retarder. The testing device comprises a driving motor, a transmission case, a pneumatic clutch, a flywheel case, a torsion and rotating speed sensor, a braking shaft, a visualized hydraulic retarder, a visualized testing chamber, a circular guide rail, a synchronizer, a double-pulse laser, CCD (Charge Coupled Device) cameras, a water storage tank, a water pump, a pressure inductor, a pressure reducer, a particle dispenser, an electromagnetic flowmeter and the like; the visualized testing chamber is made of a transparent material and is suitable for an aqueous medium; the braking shaft is driven by an external driving system, is supported by a bearing, passes through a shell of the hydraulic retarder and is connected with a driving wheel of the retarder; the first CCD camera is arranged at the top of the visualized testing chamber and is used for shooting downwards; the second CCD camera and the double-pulse laser are arranged on the circular guide rail and can arbitrarily rotate along the guide rail; and the circular guide rail and the visualized testing chamber are respectively fixed on the base. The testing device and the method disclosed by the invention can be used for carrying out three-dimensional PIV measurement on the internal flow field of the hydraulic retarder and is simple and compact in structure, good in universality and easy to control.

The invention relates to an automobile movement state measuring system for automobile movement safety evaluation field test, providing a complete automobile movement state measuring system based on RTKDGPS and high accuracy IMU for automobile performance field test, and the system comprises high accuracy GPS receiver, high accuracy inertia measuring unit (IMU), embedded special processing system and corresponding interfaces, where the original data collected by the high accuracy GPS receiver and IMU are together transmitted through the respective interfaces into the embedded special processing system, and the embedded special processing system runs GPS data coordinate transform, preprocessing module, inertia navigating system (INS) algorithm module, improved Kalman filter fusion algorithm software and real-timely records and displays and supplies high accuracy automobile movement states including acceleration, angular speed, automobile speed, displacement, and posture through interface to upper computer.

The object of the Electrical Density Gauge (EDG) invention is to provide a low cost, portable, non-nuclear, and rugged field-use device that measures dry density in soils that have been constructed for use as road-beds and building foundations. This data is used to ensure the quality control of the constructed foundation. The electrical properties of soil are measured at a radio frequency using probes driven into the soil. To calibrate EDG, certain algorithms of these electrical properties are related to physically measured wet densities and unit weights of water for a plurality of calibration test spots. Correlation regressions are found, that are used to convert values of the electrical properties measured at unknown field test spots into values of dry density.

The invention relates to an SOC and SOT combined state estimation method based on a power battery electric-thermal coupling model, and belongs to the technical field of battery management. The methodcomprises the steps of selecting a to-be-measured power battery, building the electric-thermal model of the power battery, and determining parameters needed for estimating the SOC and the SOT of the power battery; under different temperatures, conducting trickling charging-discharging experiments and HPPC experiments on the measured power battery, building a database of equivalent circuit model parameters relevant to the temperature and the SOC under a charging and discharging condition, and simulating field test working conditions under different road conditions to build the database; conducting parameter identification to obtain characteristic parameters of the electric-thermal model, and obtaining the quantitative relation between the equivalent circuit model parameters and the temperature and the SOC under the charging and discharging condition. By means of the SOC and SOT combined state estimation method based on the power battery electric-thermal coupling model, the model is combined with a PF algorithm and the quantitative relation of the equivalent circuit model parameters relevant to the temperature and the SOC under the charging and discharging condition of the power battery to achieve the SOC and SOT combined state estimation of the power battery.

The invention discloses a method for modeling a rice and wheat leaf nitrogen content spectrum monitoring model and belongs to the field of nondestructive monitoring of crop growth information in precision agriculture. The method comprises the following steps of: fusing rice and wheat canopy leaf reflectance spectrum data which is acquired by a field high-spectrum radiometer with rice and wheat canopy leaf nitrogen content data; and establishing a canopy leaf nitrogen content spectrum monitoring model orienting different growth periods of rice and wheat based on narrow band and wide band combination. The optimal vegetation index orienting a rice and wheat jointing and booting stage and a heading and grain filling period is established by utilizing multi-point rice and wheat field test data in many years; and rice and wheat canopy leaf nitrogen content common characteristic wave band and bandwidth are developed. The model covers different species and different nitrogen levels of rice and wheat, utilizes a data validation model in an independent year, and is high in universality and high in accuracy.

The invention relates to an instrument special for the field test or the nondestructive test of the permeability coefficient for ecological permeable roadways and permeable test blocks and a test method thereof. The instrument for testing the permeability coefficient of the invention comprises a measuring cylinder, a top plate, a base, an upright post bracket, a valve and a timing device, and can intuitively and fast test the permeability coefficient of the permeable roadways and permeable concrete test blocks without sampling drilled cores of the roadways. The instrument and the method for testing the permeability coefficient simulate the calculation of natural rainfall per unit area so that the test and calculation of the permeability coefficient of the permeable roadways are more practical and operable.

The invention discloses a grassland dry matter mass remote sensing estimating method, which belongs to the field of remote sensing application. The method comprises the following steps of: collecting and processing field test data; downloading and processing Modis (Moderate Resolution Imaging Spectroradiometer) satellite data; analyzing and modeling the data and detecting the accuracy and the like. The method for establishing a ground spectrum model for predicating ground dry matter mass and correcting a Modis spectrum model through ground hyperspectral experiments is different from the method for directly predicating biomass liveweight by using NDVI (Normalized Difference Vegetation Index) data of the Modis remote sensing satellite in other like researches so that the grassland dry matter mass remote sensing estimating method is helpful for improving the predicating accuracy, is beneficial for scientific management and reasonable utilization of the grassland resources and has important practical significance in correct evaluation of the real productivity of the grassland and the sustainable use of the grass resources.

The embodiment of the invention provides a method, device and system for acquiring minimized field test configuration information. The method comprises: user equipment receives a paging message, wherein the paging message comprises a minimized field test configuration indicator which is used for indicating that the minimized field test configuration information is carried in a system broadcast message; and if the user equipment is the user equipment participating in a minimized field test, the user equipment participating in the minimized field test acquires the minimized field test configuration information from the system broadcast message after acquiring the minimized field test configuration indicator. By utilizing the technical scheme provided by the embodiment of the invention, air interface resources can be saved, and the power consumption of the user equipment out of participating in the minimized field test is reduced.

The invention provides a method for correcting near-field test phases of a millimeter wave plane. The method comprises the steps that step 1, a set XY plane is scanned and four points in a zone with strong signals are selected to serve as phase sampling points; step 2, preset periods are set, plane scanning is conducted on the four points, and collection moments, collection data and collection positions of the four points in each period are determined; step 3, according to data variable quantity of the selected four points, the phase of each point in the scanned plane is corrected; step 4, Fourier transform is conducted on the corrected data of the whole scanned plane, far-field data are calculated through near-field data, and the near-field far-field transformation formula is . According to the technical scheme, a function relationship, corresponding to the sampling points, of phase drift and time is established through the method that the positions of the appointed sampling points on the scanned plane and the sampling data in the positions are recorded, phase compensation of the data of the whole scanned plane is achieved through the interpolation mode, and therefore the measurement accuracy of a near-field measurement system under a millimeter wave frequency band is improved.

The invention discloses a method for radish soil testing and formulated fertilization. Currently, farmers mainly use fertilizer in farming and fertilization, however, soil is hardened, the yield and the quality of crops are reduced, and environment problems of lost and unbalanced soil nutrient, non-point source pollution and soil acidification are caused. A soil test and a fertilizer field test serve as a basis, and according to radish fertilizer requirement laws, nutrient preserving capability and fertilizer response, the application amount, the application period and the application method of fertilizer such as nitrogen, phosphorus, potassium, microelements and secondary elements are provided on the basis of reasonable organic fertilizer application. The scientific fertilizer application is applied in accordance with radish growth rules, the fertilizer utilization rate is improved, the soil fertility is improved, the soil pollution caused by improper fertilizer application is reduced, the biological environment is improved, and the radish yield and economic benefits are improved effectively.

The invention discloses a whole-field testing method for the internal flow of a drip emitter maze flow channel, which belongs to the technical field of detection. Firstly, a transparent cylindrical drip emitter flow channel model and an internal flow rate testing system of the drip emitter maze flow channel are constructed, and water flow moving action is represented by the following movement of a tracer particle and a DPIV system on the basis of tracer fluorescent particles; and by a laser beam illumination flow field, a CCD camera is used for continuously shooting pictures of the flow field, and related computation is carried out on two continuous frames of particle pictures so as to obtain the characteristic parameters of the speed flow field. The invention utilizes a microscope objective to modify a conventional CCD camera so as to successfully solve the contradiction between the shooting area and the image resolution of the internal fluid flow of the critical scale of the drip emitter flow channel and successfully realize the two-dimensional whole-field and quasi-three-dimensional local undisturbed test of the internal flow field of the drip emitter flow channel. The invention has the flowing characteristics of the maze flow channel and the characteristic of being consistent with the whole-field test result display of the existing numerical simulation and water flow movement.

The invention relates to an external mounted electric combined test car comprising a driver's cab and a rear carriage which door is disposed at the tail. A frame is arranged along one side of the carriage body of the rear carriage and is provided with a plurality of test apparatuses which are used by the electric transmission and transformation equipment for field test and condition repair test. An opening is provided on the frame and test apparatuses side of the car body. Correspondingly to the opening, a sliding door capable of being opened outwards is installed on the opening. All the backboards of the test apparatuses are arranged outwards, the test apparatuses can be directly connected with the device to be tested only by opening the sliding door while in field test, thereby, the space outside the car can be sufficiently utilized, the inconvenience and narrow space of the external mounted test car are overcome, meanwhile, a whole operation cabin can be provided for the car.

The invention provides a nondestructive examination device of crack defects of the inner surface of an underground foundation embedded section of a reinforced concrete electric pole, which comprises asupporting sleeve and an autoscope system. The invention also provides a nondestructive examination device of the crack defects of the inner surface of the underground foundation embedded section ofthe reinforced concrete electric pole, which comprises the following steps: extending a flexible electronic video industrial autoscope into the electric pole through a drain hole of the electric poleby using the supporting sleeve, and positioning the flexible electronic video industrial autoscope at the axes of the electric pole; realizing movements in vertical direction and rotating direction through external control by an autoscope probe, and transmitting the collected image of the inner surface of the electric pole to an external video monitor so that detection staffs can observe and judgethe crack defects. The invention has convenient field test operation without dismantling the electric pole and is suitable to the safety operation maintenance of various electric poles in an overheadpower transmission line project.

The invention relates to a system for testing the comprehensive heat conductivity coefficient and specific heat capacity of a rock-soil body. The system comprises a heating device and a measuring device, wherein the heating device comprises a heat preservation water tank, an electrical heating rod, a water pump, a heat preservation water inlet pipe, a heat preservation water return pipe, a heat exchanger tube and a balance valve, and the measuring device comprises a rock-soil body temperature sensor, a fluid temperature sensor and a flowmeter. The electrical heating rod is arranged in the heat preservation water tank, the water pump is arranged on the water inlet pipe, the flowmeter and the balance valve are arranged on the water return pipe, and the two ends of the heat exchanger tube are respectively connected with the water inlet pipe and the water return pipe. The invention simultaneously discloses a testing method of the system for testing. With the system, the disturbance and damage which are caused by a laboratory test method to the original structure of the rock-soil body are overcome; the defect that a heat probe method is not long enough is overcome; and the defect that the convention vertical buried pipe rock-soil thermal response test cannot test the thermal-physical characteristic parameters of all the layers of the rock-soil bodies is made up. The system is simple and easy to operate during field tests, and is low in cost. The thermal-physical characteristic parameters which are obtained through utilizing the theory to invert are accurate and reliable.