137results about How to "The test effect is accurate" patented technology

The invention relates to a fiber type vibration sensing and measuring system, especially to a notch type fiber vibration sensing system based on a cantilever structure. The system mainly comprises a support structure, an elastic cantilever beam, a test mass block, a fixed fiber beam, a connecting fiber, a notch type grating, a variable optical attenuator, a balancing photo detector, an electronic spectrum analyzer and a polarization controller. The test mass block is applied to the tail end of the cantilever beam, and can detect the vibration amplitude and acceleration signals. A test module is driven in an optical driving manner, an acceleration generates relative displacement change of the cantilever beam, and the relative displacement change is converted to change of optical signals. According to the intention, the optical signal change is detected and converted to the acceleration and vibration amplitude of a measuring carrier, the structure is simple, the technical cost is low, and the system is not limited by a vibration direction of an object, and has practical application values.

The invention discloses a hypersonic aircraft thermal protection material ground simulation test system and method. In a ground test process, a laser is used for heating a test piece, simulated airflow is loaded on the surface of the test piece, and an external force is loaded on the test piece through an electronic universal testing machine. Therefore, the material mechanical properties of the hypersonic aircraft thermal protection material in a real environment are simulated and evaluated, and finally, the thermal protection properties of the hypersonic aircraft material and the structure are inspected. The method has the characteristics of simple equipment, low test cost, high heating rate, high test temperature and wide application range.

The invention discloses an electric energy meter seal performance testing device, which comprises a mother board replacement component 1, a fixed mother board 2, a mother board transplanting component 3 and a testing component 4. The improvement of the electric energy meter seal performance testing device is characterized in that the testing device is arranged in a stereoscopic framework formed by columns which are vertically placed and lining plates which are connected with the columns and are horizontally placed; a bottom board of the mother board transplanting component 3 is arranged on a lining plate at the middle part; supporting columns are arranged at the bottom part of the mother board transplanting component 3; the fixed mother board 2 is arranged above the mother board transplanting component 3 and is connected through a linear guide rail 24 which simultaneously penetrates through the mother board replacement component 1; the testing component 4 is arranged in parallel behind the mother board transplanting component 3. The electric energy meter seal performance testing device provided by the invention has the advantages of simple structure, convenience in installation and low manufacturing cost, and can be widely applied to scientific research institutes and industrial detection departs.

The invention relates to a module for separating a different-mode signal and a common-mode signal. The module comprises a first transmission-line transformer. The two ends of a first transmission-line transformer primary coil are connected with the firing line output terminal and the null line output terminal of a line impedance stabilizing network respectively, the first transmission-line transformer primary coil is connected between the firing line output terminal and the null line output terminal, a center tap is arranged in the middle of the primary coil, the center tap is grounded through a first resistor, the center cap is connected with a common-mode signal output terminal, the firing line output terminal is further connected with one end of the input end of a second transmission-line transformer, the corresponding output end of the second transmission-line transformer is connected with a different-mode signal output terminal through a second resistor, the null line output terminal is further connected with the other end of the input end of the second transmission-line transformer, and the corresponding output end the second transmission-line transformer is grounded. The module has the advantages of being simple in circuit structure, good in common-mode rejection ratio and different-mode rejection ratio, precise in test effect, small in size, light in weight and the like.

The invention discloses an underwater robot propeller thrust testing device which comprises a motor holder, a linear guide rail in horizontal arrangement and a supporting frame for supporting the linear guide rail. A first slider is arranged on the linear guide rail in a matched manner, and the motor holder is connected with the first slider through a connection frame and suspended above the linear guide rail through the connection frame; the testing device further comprises a spring arranged between the first slider and the supporting frame and used for resisting movement of the motor holder,and a strain recording device for recording deformation of the spring is arranged on the supporting frame. A force is directly applied to the spring through displacement of the slider, so that transmission process is simplified; motor thrust of an underwater robot can be tested through deformation of the spring, impact of various factors probably existing in the process is eliminated, and the testing device is more accurate in testing effect and simpler in principle and can be applied in various environments with instable water flow.

The invention relates to the field of friction test devices, and concretely relates to a friction wear test machine. The friction wear test machine comprises a frame, and a rotating shaft and a lifting shaft which are coaxially arranged on the frame along a vertical direction, the rotating shaft is driven by a rotation driving device arranged on the frame to rotate, the lower end of the rotating shaft is connected with a cutter sample clamp for fixing a cutter sample through a movable interface, the lifting shaft is driven by a lifting driving device arranged on the frame to lift, an elastic connecting piece is arranged between the lifting shaft and the lifting driving device, and a substrate sample clamp for fixing a substrate sample is arranged at the upper end of the lifting shaft. Thefriction wear test machine can accurately control a pressure between the cutter sample and the substrate sample and overcome bounce of the cutter sample and the substrate sample, caused by poor processing precision, and can easily carry out friction wear test in multiple forms.

The invention discloses a method for dynamically testing embedded system software which comprises a tested program to be dynamically tested. The method comprises the following steps: setting a test module for dynamically testing the tested program in the tested program; and calling the test module in the running process of the tested program so as to implement the dynamic test on the tested program. The method implements automatic dynamic test on the software without a special hardware test platform by embedding the test module into the tested program and automatically calling the test module to dynamically test the tested program in the running process of the tested program.

The invention discloses a performance test system and test method for an explosion suppression and explosion resistance mining device. The performance test system is characterized by comprising a test steel pipe (6) capable of being pumped to negative pressure, and a detection and ignition unit and a test and gas supply unit (13) are arranged on the pipe wall of the test steel pipe (6); an explosion suppression and explosion resistance device is fixed at the middle part of the test steel pipe (6); a sensor group (5) used for triggering the explosion suppression and explosion resistance device is mounted in a pipeline between the detection and ignition unit and the explosion suppression and explosion resistance device, and a plurality of flame sensors (14) are mounted on the pipe wall between the test and gas supply unit (13) and the explosion suppression and explosion resistance device; a controller which is connected with the detection and ignition unit, the test and gas supply unit (13), the sensor group (5) and the flame sensors (14) and controls the components to work is arranged. The performance test system can simulate the real negative-pressure environment in an extraction pipeline, so that the test concentration is arbitrarily set, and the performance test system is strong in universality.

The invention relates to a Raman spectrum probe extending device for detecting a deeper solid sample. The Raman spectrum probe extending device comprises an inner tube, a reflecting mirror, a window protective casing, a taper and a focusing lens, wherein a window is formed in the side wall of the inner tube; the reflecting mirror is located in the inner tube; the window protective casing sleeves the inner tube; the taper is arranged at the front end of the inner tube; the focusing lens is arranged at the rear end of the inner tube. Compared with the prior art, the Raman spectrum probe extending device disclosed by the invention has the advantages that convenience in operation is realized, i.e., the probe extending device can be directly inserted into the middle part of a sample bag to acquire Raman spectrum information of the sample; the structure is simple; an optical system consists of the quartz glass window, the reflecting mirror and the focusing lens; a spectrum signal of the sample can be directly reflected into a detector; measurement efficiency is high; after the probe extending device is connected with a Raman spectrum system, the whole spectrum acquisition and matching identification process can be finished in a short time.

The invention provides a side slope three-dimensional bottom friction testing device and belongs to a testing device for simulating side slope damages. The side slope three-dimensional bottom friction testing device is composed of a side slope model, a friction device, a horizontal loading device and a basic framework, wherein the side slope model can be an entity with a plurality of steps and is packed in a rectangular box body; the friction device is arranged at the bottom of the side slope model; and the horizontal loading device is arranged at the back part of the side slope model. By utilizing the friction device at the bottom and the loading device at the back part, a shear force generated when a side slope is damaged is simulated, so that a condition that the three-dimensional side slope model is damaged under natural or manual conditions is simulated. The testing device provided by the invention is simple in structure and low in manufacture cost, can be used for clearly observing a damaging manner of the side slope, and also can be used for relatively accurately determining damage data and effect of the simulated side slope model.

The invention discloses a yarn twist contraction performance test method and device. The device comprises a base and a support. A stepping motor is installed on the support. A pneumatic clamp is connected to the lower end of the stepping motor. One end of yarn is connected to the pneumatic clamp and the other end of the yarn is connected to a tension controller. One end of the yarn is fixed through the pneumatic clamp, the other end of the yarn is not fixed and a yarn tension force is controlled only through a yarn controller so that the problem that the traditional method fixes two ends of the yarn so that yarn strength is reduced and a test result is furthermore is solved. The method and device have operation simpleness and convenience and produce an accurate test result.

The invention belongs to the technical field of soil analysis measurement and relates to a method for measuring whole vanadium in soil. The method comprises the steps of weighting and placing a soil sample into a conical bottle, adding aqua regia, heating the soil sample dry on an electric furnace with a ventilation cabinet, taking down the soil sample, cooling the soil sample, adding perchloric acid, heating again to emitting white smoke, removing nitric acid after the soil sample is in ropiness, taking down the soil sample to cool, adding diluted hydrochloric acid to dissolve, filtering with distilled water to be arranged in a measuring flask in a constant volume mode, shaking up, standing, obtaining vanadium-contained soil solution to be measured, placing the vanadium-contained soil solution into a colorimetric tube, sequentially adding a color developing agent, hydrogen dioxide solution and hydrochloric acid solution, then sequentially adding a screening agent to stand and shake up to be placed, measuring absorbance of colored complex at the 575nm wave length position with a cuvette, recording measurement results, analyzing and calculating. The method is simple in technical process, reliable in measurement principle, accurate in measurement effect and data, friendly in measurement environment, and widely suitable for measuring various kinds of vanadium-contained soil.

The invention relates to a modular servo drive unit comprehensive test platform based on bus control. The platform comprises a plurality of servo drive unit components, each servo drive unit componentin the plurality of servo drive unit components at least comprising a servo drive unit; a controller used for controlling the plurality of servo driving units corresponding to the plurality of servodriving unit assemblies; wherein the plurality of servo driving units are connected with the controller through an Ethernet automatic control EtherCAT bus. According to the invention, through an EtherCAT bus control mode, a group of multiple servo driving units are connected in series to carry out multi-machine test of a bus mode, so that a more accurate, faster and more controllable test effect is achieved, the consumption of test time is reduced, and the labor cost is reduced.

The invention discloses a method for detecting the water injection effect of coal mine impact coal bed, which detects the water injection effect of a coal mine impact coal bed through analyzing an electromagnetic radiation image which is generated by coal bed samples in the process of a compressed destructive test. The invention has the advantages of simple and scientific method and accurate test effect, which is not influenced by physical factors, and is particularly suitable for the security detection work of large-scale coal mines.

The invention relates to a tester for rapidly testing a heat-insulating property of a fabric, and belongs to the technical field of textile measurement. The tester mainly comprises two heating plates,a temperature acquisition and control module and an air flow generation module, and the two heating plates are placed on the same horizontal plane. The tester for rapidly testing the heat-insulatingproperty of the fabric is reasonable in structure and convenient to operate and use. By the tester for rapidly testing the heat-insulation property of the fabric, the heat-insulation property of the fabric can be tested rapidly, the heat-insulation index of the fabric can further be tested in an open environment, and the theoretical basis is provided for researching and evaluating heat transfer performance indexes of the fabric.

The invention provides a fuel cell water distribution piece testing device and a testing method thereof and relates to the technical field of fuel cells. The device comprises a high-pressure gas source, a pressure regulating valve, a control flow meter, a bubbling humidification tank, a heat exchanger, a circulating water pump, a sprayer, a dew point detector, a water distribution piece, a drain valve and a TVP particle size distribution instrument, wherein the high-pressure gas source is connected with the control flow meter, the control flow meter is connected with a gas inlet of the bubbling humidification tank, a gas outlet of the bubbling humidification tank is connected to the water distribution piece, a heat exchanger and a circulating water pump are connected between a circulating inlet and a circulating outlet of the bubbling humidification tank, a dew point detector and a sprayer are sequentially connected between pipelines of a water outlet and a gas outlet of the bubbling humidification tank, a liquid outlet of the water distribution piece is connected with a drain valve, and the gas outlet is connected with a TVP particle size distribution instrument. According to the high-pressure gas source, a running state of the galvanic pile can be simulated, the independent performance test can be carried out on the water distribution piece in the simulated running state of the galvanic pile, the test effect is accurate, efficiency is high, and the cost is low.