34results about How to "Meet the test conditions" patented technology

The invention discloses a discrete element modeling method for a rock and earth mass triaxial test taking film effect. The method includes following steps: S1, modeling a sample preparing container; S2, modeling a rock-earth mass sample; S3, endowing the generated rock-earth mass sample with material attribute of given sample units, balancing stress among the sample units to complete making of the rock-earth mass sample; S4, building an elastic film, replacing a rigid barrel of a sample preparing container model with the elastic film, setting corresponding material attribute for the elastic film to complete building of a triaxial test discrete element model. Further, the invention further discloses a numerical simulation method based on the discrete element model. According to given pressurizing conditions, stress loading is adopted to axially pressurize the rock-earth mass sample, and lateral confining pressure is applied on the rock-earth mass sample through water pressure. A film unit is adopted to simulate a latex film in the triaxial test, and flexible boundary of the latex film better conforms to actual circumstance of indoor triaxial test numerical simulation.

Provided are a system and method for optically measuring the space detector take-off or landing process. The system comprises a calibration module, an imaging module and a data processing module. Theimaging module images the take-off or landing process of a space detector to be measured and transmits an imaging result to the data processing module. The calibration module calibrates elements of interior orientation and exterior orientation of the imaging module and transmits the elements of interior orientation and exterior orientation to the data processing module. The data processing modulereceives the imaging result transmitted by the imaging module and receives the elements of interior orientation and exterior orientation. According to the imaging result and the elements of interior orientation and exterior orientation, motion parameters of the space detector to be measured in the take-off or landing process are calculated. By adopting a binocular pose measuring algorithm based oncontrol points, the physical quantities such as space position and poses in the take-off process of the space detector on the surface of an extraterrestrial celestial body are accurately measured, and motion parameters such as the speed, accelerated speed and angular spin rate of the space detector are obtained.

The invention relates to the technical field of photovoltaic new energy, in particular to a direct current power source device for a photovoltaic inverter. The direct current power source device for the photovoltaic inverter is characterized by comprising an input electric reactor, a soft start circuit and 12-pulse-wave rectifying circuit; the input electric reactor is arranged at the front end of the soft start circuit; the rear end of the soft start circuit is connected with the 12-pulse-wave rectifying circuit; the function of reducing the input current harmonic is achieved through the input electric reactor to enable the power grid voltage to satisfy a testing condition of the photovoltaic inverter. The direct current power source device for the photovoltaic inverter has the advantages of being simple in structure, reducing the current harmonic inputting into the direct current power source, reducing the power grid voltage distortion, being matched with the photovoltaic inverter in utilization after grid connection, reducing electricity, being energy saving and environmental friendly, enabling the power grid voltage to satisfy a photovoltaic inverter testing condition and the like.

The invention relates to the technical field of testing of combustion performance of multi-hydrocarbon air-mixed gas, in particular to an air-mixed gas combustion performance testing system and a testmethod thereof. The test system comprises a mixed hydrocarbon loop, an air loop, a heat circulation loop and a test pipeline, wherein test units for realizing flow measurement, temperature measurement and pressure measurement are arranged on the mixed hydrocarbon loop, the air loop, the heat circulation loop and the test pipeline. The test system can provide a perfect hardware test platform for the influence of each influence factor on the combustion performance of the mixed gas under the single action or multiple actions in the air-mixed gas production process, and finally provides accuratedata support for the development of various hydrocarbon air-mixed gas devices; and another purpose of the invention is to provide a test method based on the air-mixed gas combustion performance test system so as to ensure the test efficiency.

The invention relates to a gasoline engine direct injection type fuel injector performance detecting system. The gasoline engine direct injection type fuel injector performance detecting system comprises an experimental liquid pressure stabilizing and holding device, an experimental liquid pressure adjusting and driving device, an experimental liquid temperature adjusting device, an experimental liquid supplying device, a fuel injector installing device, an experimental constant volume device and a control system, wherein the experimental liquid pressure stabilizing and holding device is a constant temperature and constant press tank body and provided with five ports, namely, a nitrogen pressure input port, an experimental liquid supplying port, an experimental liquid output port, a temperature controlling input port and a temperature controlling output port, a pressure sensor, a temperature sensor and a liquid level sensor are arranged in the tank body, the nitrogen pressure input port is connected with the experimental liquid driving device, the experimental liquid supplying port is connected with the experimental liquid supplying device, the experimental liquid output port is connected with the fuel injector installing device which is connected with the experimental constant volume device, the experimental liquid adjusting and driving device is connected with the experimental constant volume device, and the temperature controlling input port and the temperature controlling output port are connected with the experimental liquid temperature adjusting device to form a loop.

The invention provides a test device used for a water pipe connector and an implementation method thereof. The test device comprises a test connector, a test bed, a tension bar installed on the test bed, a water machine system for providing water pressure for the test connector, a dynamometer, a pressure meter and a thermometer, wherein the water machine system and the test connector form a water circulating system; the pressure meter and the thermometer are used for displaying monitoring data; the tension bar is used for detecting the pressure endurance capability of the test connector; and the pressure endurance capability is displayed by the dynamometer. The test device has the following beneficial effects that: the test device can test such performances of the pipe connector as pressure endurance, drawing endurance and heat cycle and can test a certain performance of the connector or simultaneously test several performances jointly; the test parameters can be independently controlled by the component parts and can satisfy the test conditions in a short time; and the device is simple and convenient to operate and flexible and reliable to control, can completely satisfy test of various performances of the connector, solves the problems of the existing test devices and provides test ways for wide application of the water pipe connector.

The invention discloses an online detection device for rheology of a micro-injection molded polymer under an ultrasonic energy field and an online detection method. The device comprises a test mold, a heating unit and a power loading unit, the test mold comprises a core mold cover plate, a cavity thickness adjusting gasket, a core mold base plate and a material storage barrel which are sequentially arranged from top to bottom, a plasticizing cavity which is arranged in an up-down penetrating manner is formed in the core mold cover plate, the cavity thickness adjusting gasket, the core mold base plate and the material storage barrel, and a first core mold is clamped at the position, at one side of the plasticizing cavity, of the core mold cover plate; a viscosity measuring core mold is clamped at the position, located at the other side of the plasticizing cavity, in the the core mold base plate, and a runner on the first core mold is one of an injected runner or a to-be-injected runner ; the heating unit comprises a plasticizing heating resistor and a mold heating rod; and the power loading unit comprises an injection unit and a mold opening and closing unit. According to the device, on-line detection of the flow viscosity of polymer melt in four different modes can be realized; and on-line detection of the viscosity of the polymer melt under different cavity thicknesses can be completed.

The invention discloses a gas layer reducing resistance type physical simulation testing device and a testing method thereof and belongs to the field of fluid resistance measurement. The gas layer reducing resistance type physical simulation testing device comprises a water/air supply system, a water/wind tunnel system and a force measurement system. The water/air supply system combines a high-pressure air tank with a high-pressure water storage tank, and a middle experimental section of the water/wind tunnel system is fixed to a mounting frame through a front supporting seat and a rear supporting seat. In the force measurement system, a test model is fixed at the front end of a force transfer rod, extends into an a cylinder in the experimental section and then extends out through a firstlinear bearing on a cover plate, and the rear end of the force transfer rod butts against a force measurement female tooth at the front end of a dynamometer through a force measurement male tooth. Thetest model is hindered by interaction with fluid, acting force generated by the fluid pushes the test model, and the force transfer rod transfers the acting force borne by the test model to the dynamometer, so that resistance data of the test model are obtained. The gas layer reducing resistance type physical simulation testing device is simple and compact in structure, easy to operate, low in cost, stable and reliable in test and convenient in replacement of experimental models, and overcomes the defects of long preparation period and huge investment of water/wind tunnel experiments.

The invention provides a scramjet engine tracer PLIF multi-parameter distribution measurement device and a scramjet engine tracer PLIF multi-parameter distribution measurement method, and the scramjet engine tracer PLIF multi-parameter distribution measurement device is constructed. A plurality of CCD cameras are used for obtaining a tracer PLIF image when fuel injection conditions are simulated, a relation f (P) between a laser-induced fluorescence image intensity ratio I1/I2 obtained through constant-temperature and variable-pressure image intensity calibration and pressure intensity P, and a relation f (T) between a laser-induced fluorescence image intensity ratio I3/I4 obtained through constant-temperature and variable-pressure image intensity calibration and temperature T; the relation f (n) between the laser-induced fluorescence image intensity I5 obtained by calibrating the image intensity of the constant-pressure and constant-temperature variable component concentration and the tracer mass concentration n in the cavity is obtained, and the concentration, the pressure intensity and the temperature field quantitative distribution result of the jet fuel of the scramjet engine can be directly obtained. According to the invention, synchronous measurement of components, pressure intensity and a temperature field in the scramjet engine can be realized.

The invention discloses a heat exchanger performance test and energy efficiency evaluation system. A to-be-tested platform is provided with an oil-water to-be-tested heat exchanger and a water-water to-be-tested heat exchanger; inlets of a hot oil loop and a hot water loop are respectively communicated with hot side outlets of the two to-be-tested heat exchangers; the steam loop comprises a steam-oil heat exchanger and a steam-water heat exchanger; the steam-oil heat exchanger and the steam-water heat exchanger provide exchange heat through steam; inlets of the steam-oil heat exchanger and the steam-water heat exchanger are respectively communicated with outlets of the hot oil loop and the hot water loop, and outlets of the steam-oil heat exchanger and the steam-water heat exchanger are respectively communicated with hot side inlets of the two to-be-tested heat exchangers; an outlet of the cooling water loop is communicated with cold side inlets of the two to-be-tested heat exchangers; an inlet of the cold water loop is communicated with cold side outlets of the two to-be-tested heat exchangers, and an outlet of the cold water loop is communicated with an inlet of the cooling water loop; and the data acquisition system comprises a plurality of detection sensors mounted on the pipeline.

The invention discloses a rotatable netting device for researching hydrodynamic force. The rotatable netting device comprises a supporting frame, a rotating device, a telescopic rod, a sliding device, a six-component sensor, a connecting rod, a netting frame and a netting. In the process of researching the hydrodynamic force of the planar netting under the pure flow effect, the netting is fixedly designed through the netting frame to reach a tensioning state, the netting is matched and fixed with the netting frame by adjusting the length of the telescopic rod, the incident flow angle of the netting is adjusted through the rotating device, and the netting frame is subjected to two-dimensional movement by moving the sliding device and adjusting the length of the telescopic rod. The netting test device can meet various netting assembly conditions and test working conditions due to the characteristics of detachability, modularization and multiple functions. According to the invention, adjustable parameters of a single netting test device are increased, and the netting test efficiency is improved.