31results about How to "Avoid Test Impact" patented technology

The invention discloses a branch test connection device for high-speed data acquisition equipment. The connection device comprises an equipment main body, data lines and connectors. The connectors arearranged on the left portions of the data lines and connected with an interface in the right portion of the equipment main body; fixing frames are fixed to the front portion and the rear portion of the right end of the equipment main body through screws; U-shaped frames are arranged on the inner sides of the fixing frames; the left portions of the U-shaped frames are clamped in the fixing framesthrough installation blocks; and the U-shaped frames make contact with the right end of the equipment main body. According to the invention, through cooperation of the fixing frames, mounting blocks and fastening bolts, the U-shaped frames can be conveniently and quickly disassembled and assembled; through cooperation of the U-shaped frames, the mounting plate, a positioning plate, fixing blocks and a long bolt, a connector is conveniently positioned, poor contact is prevented from influencing the test; through first magnets, second magnets and an end cover, dust prevention is conveniently performed on the interface in the equipment main body; dust falling is prevented from influencing use; use is convenient; and connection stability is good.

The invention discloses a test system and a test method for testing the performance of digital printing ink, belonging to the technical field of digital printing ink performance. The invention comprises an ink supply unit, a nozzle, an ink drop observer, a control unit and a droplet suction device; the ink supply unit is connected with the nozzle through an ink tube, and is used for supplying ink to the nozzle; the control unit is electrically connected with the nozzle, and is used for controlling The nozzle sprays ink; the control unit is electrically connected to the ink drop observer, which is used to control the ink drop observer to observe and record the shape of the ink droplets ejected from the nozzle, and transmit the recorded information to the control unit; the droplet suction device is located in the nozzle The bottom of the nozzle is used to collect ink droplets ejected from the nozzle and droplets generated during inkjet. The invention quantitatively evaluates the performance of the ink by testing the ejection speed, the shape of the ink drop, the volume of the ink drop and the ejection stability for a long time, the data is accurate and reliable, the cost is economical, and there is no waste of substrates and ink.

The invention relates to a testing machine, in particular to a cloth wear resistance testing machine. The technical problem of the present invention is to provide a cloth wear resistance testing machine that can replace manual testing of cloth wear resistance, avoid hand soreness from affecting subsequent tests, and can also collect and process cloth scraps that fall during testing. A cloth wear resistance testing machine, including a frame body, legs, a first bearing seat, a first rotating shaft, a driving motor, a roller, etc.; A first bearing seat is embedded in the middle of the middle and the bottom. In the present invention, the cloth is fixed in contact with the ring-shaped grinding plate through the fixing device, and the wear resistance of the cloth can be tested by the ring-shaped grinding plate by starting the overdrive motor. Soreness interferes with subsequent tests.

The invention provides a sealed liquid differential pressure layered settlement gauge and an embedding and measuring method thereof. The settlement gauge comprises a settlement plate, a top hydraulic sensor, a middle hydraulic sensor group and a bottom hydraulic sensor. The top hydraulic sensor is fixedly installed below a settlement plate through a flange and comprises a liquid tube with a sealed tube opening. The middle hydraulic sensor group comprises at least one hydraulic sensor and anchor flukes fixed on the hydraulic sensor. A liquid tube of the first hydraulic sensor in the middle hydraulic sensor group is communicated with a liquid tube of the top hydraulic sensor through a liquid three-way tube. The bottom hydraulic sensor is fixedly installed on a hole bottom fixing device, and a liquid tube of the bottom hydraulic sensor is communicated with a liquid tube of the last hydraulic sensor in the middle hydraulic sensor group through a liquid three-way tube. The liquid differential pressure is used as the tested physical quantity, the liquid tubes of the sensors are sealed and isolated from the outside, and adaptive capacity is strong. The sealed liquid differential pressure layered settlement gauge is a testing structure with flexible connection in the vertical direction and avoids test influence caused by lateral bending.

The present invention discloses a magnetorheological damper high-speed heavy punch test system. The system comprises a guide rail, a heavy punch, a damper installation base, an ejection mechanism andan adjustable damping mechanism. The guide rail is obliquely arranged, the heavy punch and the damper installation base are slidingly installed at the guide rail in an unidirection mode, the ejectionmechanism is arranged at the upper side of the guide rail and gives initial kinetic energy with adjustable size to the heavy punch, the adjustable damping mechanism is arranged at the lower side of the guide rail and gives adjustable damping force to the damper, the inclination angle of the guide rail in a free state can be arranged in a mode of force balance in an inclination direction; and the magnetorheological damper high-speed slug test system further comprises a speed sensor configured to detect an initial speed corresponding to the initial kinetic energy of the heavy punch. The magnetorheological damper high-speed heavy punch test system is simple in structure, flexible and convenient in test data and easy to obtain accurate and real energy absorption rate in the collision process and provides reliable basis for the test of later optimization of the buffer performance of a magnetorheological bumper.

The invention discloses an acid-resisting test system used for fracturing propping agents. The acid-resisting test system comprises an acid preheater, a tester, a press, an acid storage tank, an acid metering pump and a cooler. An open material containing cavity is formed in a shell of the tester, and a liquid inlet and a liquid outlet are formed in the shell and communicated with the material containing cavity. The tester further comprises a gland suitable for being inserted into the material containing cavity, the gland is matched with the bottom and the inner wall of the material containing cavity to form a space containing the fracturing propping agents, and a material clamping plate is arranged between the gland and the bottom of the material containing cavity. The press is suitable for exerting pressure on the fracturing propping agents through the gland. Acid liquor of the acid storage tank is pumped into the acid preheater through the acid metering pump for being heated, after being heated, the acid liquor enters the material containing cavity through the liquid inlet to be used for acid-resisting tests. The used acid liquor returns to the acid storage tank for being used in a recycled mode after cooled by the cooler. The system can be used for the acid-resisting tests of the fracturing propping agents in a simulated high-temperature high-pressure acid environment of underground strata.

The present invention provides a fuel bundle two-phase flow fluid-solid coupling test circuit, comprising a fuel bundle two-phase flow fluid-solid coupling test bench, a check valve, a flow meter, a first control valve, a circulation pump, an open water tank, Second control valve, solenoid valve, pressure gauge, pressure reducing valve, air tank, dryer, air compressor, first pipeline, second pipeline and third pipeline; one end of the first pipeline is connected to an open water tank , one end of the second pipeline is connected to the open water tank, one end of the third pipeline is connected to the air compressor, and the other ends of the first pipeline, the second pipeline and the third pipeline are all connected to the fuel rod bundle two-phase fluid-solid Coupling test bench; the first pipeline is equipped with a second control valve; the second pipeline is equipped with a circulation pump, the first control valve, and a flow meter; the third pipeline is equipped with a dryer, an air tank, a pressure reducing valve, and a pressure gauge , solenoid valve, check valve. The invention can test the fluid force and vibration state of the fuel rod bundle while testing the flow state between the passages of the fuel rod bundle.

An automatic detection press-down device for PCBA test mainly comprises a driver, driver mounting bases at the two sides, a memory bar, a DIMM slot and toggle switches; the toggle switches are positioned at the two ends of the DIMM slot respectively and can rotate partially relative to the bottoms of the two ends of the DIMM slot; and the driver comprises a main drive unit in the middle and side push drive units at the two sides. The two sides of the automatic detection press-down device are provided with DIMM slot buckle mounts respectively, the main driver is used to push the memory bar to rise and fall, the side push drive units is used to control running of the DIMM slot buckle mounts and further to control automatic locking and unlocking of the toggle switches, it is not required to control the toggle switches manually, machine test is more convenient, the condition that labor force output has to be adjusted manually is changed, machine operation is automatic, and the labor cost of enterprises is reduced.

The invention belongs to the technical field of microwave testing, and in particular relates to a testing device for ultra-low temperature complex electromagnetic parameters of microwave dielectric materials by waveguide method. The test section waveguide with a rectangular cross section is set horizontally, the microwave dielectric material to be tested that can transmit microwaves is placed in the middle of the test section waveguide cavity, and the test section waveguide cavity is separated from the middle, and the two ends of the test section waveguide are respectively set There is a section of temperature-isolated waveguides of the same size: temperature-isolated waveguide 1 and temperature-isolated waveguide 2, the outer end of temperature-isolated waveguide 1 is provided with waveguide-coaxial converter 1, and the outer end of temperature-isolated waveguide 2 is provided with waveguide-coaxial converter 2 A liquid nitrogen refrigeration chamber is arranged around the outer side of the test section waveguide, a vacuum heat insulation chamber is arranged around the outer side of the liquid nitrogen refrigeration chamber, and an insulation layer is arranged outside the vacuum heat insulation chamber. The invention adopts the testing principle of the rectangular waveguide method, and can realize complex electromagnetic parameter testing of dielectric materials from room temperature to ultra-low temperature -165°C and below.

The invention discloses a device and method for measuring the adhesion strength of gel-type leakage plugging materials and rock walls. The device includes a rotating part and a measuring housing connected with the rotating part; A T-shaped blocking rod is provided, and one end of the T-shaped blocking rod passes through one side of the measuring housing and a displacement measuring part for measuring the displacement of the T-shaped blocking rod is provided; the other side of the measuring housing is provided with a sealing plate. In the present invention, the hollow rock core is used as a container to directly contact the gel plugging material to be tested, and the internal pressure is directly injected by injecting oil, so that the gel plugging material to be tested can obtain driving force, and when the gel plugging material to be tested When the lost circulation material moves relative to the hollow core, the adhesion strength between the gel-based plugging material to be tested and the rock wall can be calculated, which is of great significance for clarifying the plugging mechanism of the gel-based plugging material and solving the problem of lost circulation.