93results about How to "The test method is reliable" patented technology

The invention provides a device for testing rock fracture seepage parameters under high temperature and high pressure conditions. The device at least comprises a tester framework, wherein a tester three-axis cylinder and a pressure head system are mounted in the tester framework, the pressure head system comprises an upper pressure head and a lower pressure head, and cylindrical samples are placed between the upper pressure head and the lower pressure head; the upper pressure head and the lower pressure head are mounted on the tester three-axis cylinder and are driven by the tester three-axis cylinder to pressurize the samples; a seepage water inlet is formed in the lower pressure head, a seepage water inlet pipe is arranged on the lower pressure head, a seepage water outlet is formed in the upper pressure head, and a seepage water outlet pipe is arranged on the upper pressure head; and an oil delivery pipe is connected to the tester three-axis cylinder, the other ends of the seepage water inlet pipe and the seepage water outlet pipe are connected with a seepage control system, and the other end of the oil delivery pipe is connected to a confining pressure control system. According to the device and the method, deficiencies in the prior art are solved, a seepage test under the high temperature and high pressure conditions can be realized, and the heat exchange efficiency in the seepage test can be tested. The device and the method have important significances to terrestrial heat exploitation.

The invention relates to a method for quickly detecting the water content of an emulsified asphalt cold-recycling mixture. The method comprises the following steps: (1) mixing an emulsified asphalt cold-recycling mixture sample according to the target mixture proportion design, or taking a sample from a production field; (2) weighting to obtain the mass of a beaker; (3) weighting to obtain the total mass of the beaker and a mixture; and (4) pouring out the emulsified asphalt cold-recycling mixture, weighting to obtain the total mass of the beaker, and emulsified asphalt, water, fine aggregates and the like adhered to the beaker, calculating a standard adherence rate P and an actual adherence rate P' of different external water blending quantities, and drawing a standard curve as an adjustment reference by taking the external water blending quantities as a horizontal ordinate and taking the adherence rates as a vertical coordinate. According to the method, test data is accurate and reliable, a test process is simple and quick, the water content can be monitored in real time during production of the emulsified asphalt cold-recycling mixture, the external water blending quantities are regulated, a wrapping effect of the emulsified asphalt and a compaction effect of the mixture are ensured, and an effective method is provided for production quality control over the emulsified asphalt cold-recycling mixture.

The invention relates to an output performance test method for a stacked piezoelectric ceramic driver, and belongs to the field of vibration inhibition of wind tunnel model test. The method is suitable for the driver of a wind tunnel active vibration inhibition pole. According to the method, an output performance test system composed of a measurement control system, a pressure sensor, a foil gauge, a stacked piezoelectric ceramic driver and a computer is used for test. The output performance test system of the stacked piezoelectric ceramic driver is installed on a pedestal, fastening nuts areadjusted according to an experiment requirement so that number of the pressure sensor reaches a predetermined pretightening force value, and the measurement and control system is operated to conduct the experiment. The computer and the measurement control system are used to collect strain and pressure information, and carry out post treatment. The test method is simple, reliable and precise, whenthe experiment condition changes, it is only required to adjust an experimental device simply, and use is convenient and practical.

The invention discloses a device and a method used for testing the flame height of lithium battery combustion. The device comprises a test box, a heating device, a camera and a smoke evacuating device. An air inlet is arranged in a corner at the bottom of the test box. An air outlet is arranged in a corner at the top of the test box. Anemometers are arranged at the air inlet and the air outlet. The camera is arranged outside a test room and a lens faces a lithium battery. A gas collecting cover of the smoke evacuating device is arranged in the test box and faces the lithium battery. During combustion, the lithium battery is arranged on the heater. After the combustion is finished, an air extracting pump is opened to evacuate smoke. A combustion video of the lithium battery is converted into an image and the image is subjected to image processing by the Matlab software. Thus, the flame height of the lithium battery combustion is obtained.

The invention discloses a determination method for a gap distance of a submarine explosive. The determination method comprises the following operating steps: selecting a water area with stationary or slowly flowing water, wherein the depth of the water area is more than 5 m; preparing a transverse bar meeting needs of a gap distance test; standardly preparing an active cartridge bag and a passive cartridge bag both with a diameter of 35 mm and prescribed density from a blasting charge, wherein the mass of the active cartridge bag and the passive cartridge bag is 150 to 200 g; and inserting a detonator No. 8 into one end of the active cartridge bag, binding the active cartridge bag and the passive cartridge bag on the transverse bar at a predetermined interval, allowing a transverse bar unit to sink into water with sinking depth being at least 3 m, detonating the active cartridge bag at a safe distance, determining whether there is induced detonation according to damage conditions of the passive cartridge bag and adopting a maximum distance obtained in three successive times of induced detonation as the gap distance. The gap distance measured by using the method can reflect actual explosive properties of the explosive during underwater blasting.

The invention relates to a rapid battery detection device and a rapid battery detection system. The rapid battery detection device comprises a box for installing a plurality of batteries to be tested, and a detection element for detecting the batteries to be tested. The box comprises a first lateral side and a second lateral side that are opposite to each other. The box is provided with an accommodating chamber which is formed by recessing from the first lateral side toward the second lateral side and is used for accommodating the batteries to be tested; and the box is provided with a plurality of through holes running through from the second lateral side toward the accommodating chamber. The detection element comprises a first testing plate outside the second lateral side and a second testing plate outside the second lateral side. On the first lateral side, the plurality of batteries to be tested that are installed inside the accommodating chamber is divided into n parallel lines; and the first testing plate is provided with n first testing strips corresponding to the n lines. On the second lateral side, the plurality of batteries to be tested that are installed inside the accommodating chamber is divided into m parallel lines; and the second testing plate is provided with m section testing strips corresponding to the m lines. The direction of the first testing strips is different from the direction of the second testing strips.

The invention relates to a testing system and method of a high-voltage processing plate of a thyristor, which is used for solving the problem that an integral function test can not be carried out on each unit of a TE (Tangent Elevation) plate on the spot. The testing system provided by the invention can detect each functional module of the TE plate and judges whether each function of the TE plateis correct or not. The testing method provided by the invention comprises a power supply test, a gate pole triggering test, a negative rechecking signal test, a low-voltage triggering test and a high-voltage triggering (BOD (Biochemical Oxygen Demand) protection triggering) test of the TE plate. The invention provides a convenient, reliable and comprehensive testing method and enhances the operating stability of the TE plate after installation, thereby enhancing the operating reliability of the whole system.

The invention aims at providing an electric heating tube testing device and method. The electric heating tube testing device and method are used for comprehensively and reliably testing the safety performance of electric heating tubes. The electric heating tube testing device comprises a metal testing barrel with a movable barrel cover. The upper portion of the testing barrel is connected with a liquid inlet pipe and an air exhaust pipe. The liquid inlet pipe is provided with a liquid inlet valve. The air exhaust pipe is provided with an air exhaust valve. The lower portion of the testing barrel is provided with a liquid outlet pipe and an air inlet pipe. The liquid outlet pipe is provided with a liquid outlet valve. The air inlet pipe is provided with an air inlet valve. The testing barrel is connected with an air pressure gauge, a hydraulic pressure gauge and a temperature gauge through pipelines. The barrel body of the testing barrel is connected with an earth terminal through a wire. The testing barrel is provided with a testing terminal communicated with the interior and the exterior of the testing barrel. The electric heating tube testing device is applicable to testing of various electric heating tubes, the electric heating tube testing method is convenient to implement, reliable and reliable, and factory testing of the electric heating tubes can be achieved.

The invention provides a real-time ultrasonic scanning device used during rock triaxial compression. The real-time ultrasonic scanning device comprises an axial pressing structure, a circumferential pressing structure and an ultrasonic scanning structure, wherein the axial pressing structure is an electro-hydraulic servo system (1), the circumferential pressing structure comprises an axial-penetrating cylinder barrel (9), the upper end and the lower end of the cylinder barrel (9) are respectively sealed by a top cover (3) and a bottom cover (14), the cylinder barrel (9), the top cover (3) and the bottom cover (14) jointly form a confining pressure chamber (7), a sample testing chamber (10) is arranged in the confining pressure chamber (7), and the ultrasonic scanning structure is a plurality of groups of ultrasonic scanning probes (13) connected to the outer lateral wall of the testing chamber (10). The real-time ultrasonic scanning device has the advantages that ultrasonic scanning can be performed on rock during the rock triaxial compression to monitor the generation of the internal cracks of the rock in real time, accurate experiment data can be obtained, a reliable testing and experiment result can be provided for a project, and a reliable testing method is provided for the prevention of project disasters and accidents caused by the cracks.

The invention provides a rocket-borne equipment vibration test system and test method for loading prestress, and solves the problems of complex test system, high test cost and complex actual operationwhen the existing rocket-borne equipment simulates a static load and a dynamic load at the same time. The rocket-borne equipment vibration test system for loading the prestress comprises a vibrationtable, a clamp, an elastic rope, a dynamometer, a force transmission rope, a gantry frame, a weight and fixed pulleys, wherein rocket-borne equipment is mounted on the vibration table through the clamp, the vibration table is used for providing a test dynamic load, one end of the elastic rope is connected with the prestress loading position of the rocket-borne equipment, the other end of the elastic rope is connected with the dynamometer, the N fixed pulleys are arranged on the gantry frame and can move up and down or left and right along the gantry frame so as to adjust the loading directionof prestress, one end of the force transmission rope is connected with the dynamometer, the other end of the force transmission rope penetrates through the N fixed pulleys, and the weight is hung at the tail end and used for providing a test static load.

The invention discloses a grain composition testing method of over-coarse-grained soil. The problems of grain size testing of a traditional soil body are solved, and the problem is solved that debrisgranularity and grain composition of the over-coarse-grained soil and a coarse-particle-containing soil body are difficult to accurately grasp. The method includes the following steps of measuring themass proportions of all soil fractions of soil grains with the equivalent grain size being larger than D through a linear density method, calculating the total mass proportion of all the soil fractions of the soil grains with the equivalent grain size being larger than D, calculating the total mass of the soil in combination with the weighed weight of the soil grains with the equivalent grain size being smaller than or equal to D of an indoor sample, obtaining the mass of all the soil fractions of the soil grains with the equivalent grain size being smaller than or equal to D through an indoor sieving method, calculating the mass ratio of all the soil fractions of the soil grains with the equivalent grain size being smaller than or equal to D, and drawing a composition curve through the result. The method has the advantage of meeting the requirement for precisely analyzing the grain size and components of the over-coarse-grained soil and other soil bodies with large-grained particles.

The invention discloses a pressurization device, a tube wall crack propagation speed testing device, a pressurization method and a testing method. The pressurization device includes a high-pressure gas delivery pipe for delivering high-pressure gas to a metal tube, an A-class air compressor, a B-class air compressor and a C-class air compressor; the high-pressure gas delivery pipe is communicated with the metal tube through a first-level valve, the A-class air compressor is arranged on the high-pressure gas delivery pipe, the tail end of the high-pressure gas delivery pipe is provided with a tee converter, and the tee converter is connected with the B-class air compressor and the C-class air compressor. The pressurization method adopts a stepped-type interval paused pressurization process, a flexible transformation pressurization and pressure-relieving way and a whole-process multi-means monitoring, and can realize that the tube internal pressure of the metal tube gradually reaches a target value; according to the tube wall crack propagation speed testing device, a time probe unit closely adheres to the metal tube wall, and opening of the tube wall and disconnection of the time probe can be guaranteed to be simultaneously carried out.

The invention aims at providing a test circuit and test method of a parallel MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) inversion module, for testing the functionality of the parallelMOSFET inversion module and looking for the corresponding hidden trouble. The test circuit of the parallel MOSFET inversion module is formed by an inversion module to be tested, a load circuit, a primary power supply, an auxiliary power supply and a PWM signal generation circuit, wherein the output terminal of the PWM signal generation circuit is connected with the input terminal of the inversionmodule to be tested; two ends of the primary power supply are respectively connected with the power terminal of the inversion module to be tested and the ground terminal of the inversion module to betested to form a closed loop; the load circuit is formed by an adjusting resistor, a load inductor, a load resistor and a load capacitor, and the adjusting resistor is connected between the power terminal of the inversion module to be tested and the primary power supply in series; the series circuit formed by the load inductor and the load resistor is connected between the output terminal and theground terminal of the inversion module to be tested in series, and the load capacitor and the primary power supply are connected in parallel; and the positive and negative terminals of the auxiliarypower supply are respectively connected with the positive and negative power pins of a drive chip in the inversion module to be tested.

The invention discloses a digital integrated test technology of a high-pressure gas source system, relates to the field of gas source system detection. According to the technology, a control computer, an external gas source, a load, a stop valve K1, a pressure gauge P1, a solenoid valve, a stop valve K2, a first pressure transmitter, a tested high-pressure air passage system, a second decompressor, a first decompressor, a first overflow valve, a second overflow valve, a pressure gauge P2, a pressure gauge P3, a third pressure transmitter, a second pressure transmitter, a stop valve K4, a stop valve K3, a first flow meter and a second flow meter in connection are used. The integrated test method can be used to greatly reduce time and resource, prevent connection complexity and repletion of test pipelines, and enable test to be convenient and efficient; and the technology with safety design avoids hidden safety hazards and makes test safe and reliable.

The invention discloses an expansion and contraction rate testing device and method for flat belt and high-place operation safety belt. The testing device comprises: a device supporting frame body; aclamping assembly which is installed on the device supporting frame body, wherein the clamping assembly comprises a first clamping part and a second clamping part which are arranged to be used for clamping the two ends of a sample to be detected respectively, the distance between the first clamping part and the second clamping part is adjustable, and the first clamping part and the second clampingpart are used for applying tension to the sample to be detected; a tension sensor which is used for testing the actual tension borne by the sample to be tested; and a soaking assembly which is used for soaking the to-be-detected sample. The expansion and contraction rate testing device is simple in structure, convenient to use and reliable in expansion and contraction rate testing method, can meet the requirement for testing the expansion and contraction rate of the flat belt and the high-place operation safety belt, accurately measures the expansion and contraction rate of the flat belt andthe high-place operation safety belt, can objectively and truly evaluate the expansion and contraction performance of the flat belt and the high-place operation safety belt after being wetted by water, and helps to guide reasonable use of the flat belt and the high-place operation safety belt.

Provided is a device and method for testing shearing resistance adhesive strength of structural adhesive between a reinforcement material and concrete. The device is characterized by comprising an upper hanging support arranged at the outer edge of an upper concrete testing block and a lower hanging support arranged at the outer edge of a lower concrete testing block. A V-shaped protrusion is arranged in the middle of the bottom face of the upper hanging support, a V-shaped groove matched with the V-shaped protrusion of the upper hanging support is arranged in the middle of the top face of the lower hanging support, and the V-shaped protrusion rotates for a certain angle in pivoted mode around a contact line in the groove. The testing method includes the detailed steps that the upper hanging support is arranged on the lower hanging support, and the V-shaped protrusion is arranged in the V-shaped groove and fixed through locating strips; and the reinforcement material is adhered to lateral sides of the testing blocks through the structural adhesive, and adhesive area of the reinforcement material on the two testing blocks is equal. After the structural adhesive is fully cured, all locating cover plates and all locating strips on one sides of the concrete testing blocks are dismantled, and pressure is exerted to enable the concrete testing blocks to have rotation tendency around the V-shaped protrusion in pivoted mode, so that shearing adhesive power is generated, when a limit value is reached and the adhesion is damaged, the shearing resistance adhesive strength can be calculated.

The invention discloses a deep sea durability testing device and method of ocean instrument equipment. The device comprises a first glass floating ball section, and a first water depth adjusting section and a second water depth adjusting section are connected below the first glass floating ball section; a second glass floating ball section and a tested test section are arranged between the first water depth adjusting section and the second water depth adjusting section; and the second glass floating ball section and the tested test section are arranged at intervals in a multi-group circulatingmanner, a third glass floating ball section is arranged below the second water depth adjusting section, an acoustic releaser is arranged below the third glass floating ball section, and a gravity anchor is arranged below the acoustic releaser. The beneficial effects of the invention are that the device can provide a motion test environment with a certain depth for one or more instruments at the same time, can provide various test lengths, and can be flexibly adjusted according to test requirements; the testing device can be repeatedly arranged and recovered and is high in utilization rate; and according to the testing method, a test risk and cost are reduced to the greatest extent.