34results about How to "Wide range of research" patented technology

The invention provides a method and a device for measuring pressure resistance and compression modulus of discrete materials. The device comprises a body and a control device, the body comprises a body top, a body base and vertical supporting columns, and a rigid pressure column is connected with the body top through a load sensor. A discrete material storage bin is provided with an upper opening which allows the rigid pressure column to pass through, at least one side wall of the discrete material storage bin is provided with a plurality of through holes, guide rods are mounted in the through holes and capable of sliding relative to the through holes, a slide retaining plate is mounted in the discrete material storage bin, and a pressure sensor is mounted between the slide retaining plate and the side wall with the through holes. A driving device which is a linear reciprocation mechanism is mounted on the body base, and the discrete material storage bin is mounted on the driving device which is capable of lifting the discrete material storage bin. One end of a position recorder is connected with the body base, and the other end of the position recorder is connected with the discrete material storage bin. By the method and the device for measuring pressure resistance and compression modulus of the discrete materials, precision and effectiveness in measurement of the pressure resistance and the compression modulus of the discrete materials are realized.

The invention belongs to the field of power systems and discloses an artificial pollution accumulation characteristic testing system and an operating method thereof. The system comprises a wind source power section, a test section and an air duct diffusion and dust removal section which are communicated in sequence; the wind source power section is used for providing natural wind for the test section; the test section is used for simulating the pollution accumulation condition of an insulator of a power grid; the air duct diffusion and dust removal section is used for collecting dust and providing an air duct outlet; and the wind source powder section is provided with a base for supporting the testing system. The testing system is internally provided with a draught fan, a dust spreading device, the insulator and the like, so that the artificial simulation for the natural pollution accumulation conditions of the insulator in typical environments such as wind, rain, fog and the like and different pollution degrees in a laboratory is realized; compared with the traditional method for researching the natural pollution accumulation characteristic through circuit sampling, the operating method is time-saving and labor-saving, safe and reliable as well as wide in research range; and a research result has important significance for the operation maintenance as well as the design and selection of the insulator of a power transmission line.

The invention discloses a cold flow test device for a scaling linear plug type spray pipe carrier. The cold flow test device comprises a lifting body component, a plug type spray pipe component, a force-measuring balance component and a supporting component, wherein a front part of a lifting body, a middle part of the lifting body and a rear part of the lifting body all have hollow structures and are fixedly connected in turn, so as to form a lifting body appearance of the carrier; the lifting body component comprises the front part of the lifting body, the middle part of the lifting body, the rear part of the lifting body, a vertical tail, a horizontal airfoil, an airfoil pin, a bottom cover plate and a belly cover plate; the plug type spray pipe component comprises a tail shell, a plug type spray pipe engine and an engine pin; the plug type spray pipe engine is mounted in the tail shell; the force-measuring balance component comprises a force-measuring balance and a balance protecting cover; and the supporting component comprises a supporting arm, a front rectifying cover and a rear rectifying cover. The cold flow test device has a simple structure and is low in cost; the plug type spray pipe engine of the cold flow test device is a single part, so that the structure is simple; the device is only applied to a cold flow test; and the ordinary carbon steel is selected as the raw material, so that the cost is low.

The invention relates to a test method suitable for multi-span transmission line ice-shedding fault research. The method comprises steps: 10, according to the prototype line structure parameters and the prototype line and model line material parameters and in combination of test site conditions, each similarity coefficient of a test model is determined through a similarity theory, wherein the prototype line structure parameters comprise a line model, a span, a height difference, sag, an ice thickness, an ice-shedding form and the like. The test method suitable for multi-span transmission lineice-shedding fault research has the beneficial effects that multiple parameters are adjustable, and the applicable research range is wide; breakthrough from nothing for the test research based on a scale model in the field is realized, and great promotion significance is realized for the related research; indoor construction can be realized, the mounting is convenient, the assembly is easy to process and prepare, and the practicality is strong.

The invention provides a six-unit tile-shaped plug nozzle cold flow test device, which comprises a plug cone, a six-unit inner nozzle plug nozzle assembly, a plug block, combustion chamber assemblies and a measuring assembly, wherein the plug block and unit inner nozzles have the same appearance and size, the molded surface structures of the left side and the right side of the plug cone are symmetrical, the molded surfaces are integrally processed, a row of round holes are processed at each side and are used for assembling the unit inner nozzles, all outlets of the assembled unit inner nozzles are in lap joint with the tile-shaped curved surface of the plug cone, the opening parts of the three unit inner nozzles positioned at the same side of the plug cone are provided with the combustion chamber assembly. In the test process, the unit inner nozzle is replaced into the plug block according to test requirements. The invention provides the compression ratio straight-line tile-shaped plug nozzle cold flow test device with multifunction, simple structure and lower cost, different test requirements are met, the height compensation characteristic of the plug nozzle and the influence of relevant structure factors on the height compensation characteristic can be studied, and the like.

The invention belongs to the technical field of measurement and particularly relates to an integrated test device for simulating a DC system integrated type grounding fault. The device comprises a test control instrument and an integrated fault simulation generator. The test control instrument is connected to the integrated fault simulation generator and comprises a first shell which is internally provided with a control circuit board. The surface of the first shell is provided with a liquid crystal display screen, a setting panel, an operation button and a master switch. The control circuit board is connected to the liquid crystal display screen, the setting panel, the operation button and the master switch. The integrated fault simulation generator comprises a second shell which is provided with a pointer type voltage meter, a pointer type ammeter and a DC output device, the DC output device is connected to the pointer type voltage meter and the pointer type ammeter through a I section branch, and the DC output device is connected to the pointer type voltage meter and the pointer type ammeter through a II section branch. The integrated test device has the advantages of a wide research range of a test and a quick and efficient process.

The invention discloses a visual test device for simulating grouting of grouting holes in different positions of a duct piece. The visual test device comprises a double-liquid grouting system, a model box system, a support system and a data acquisition and processing system. The invention further provides a test method of the visual test device for simulating grouting of the grouting holes in the different positions of the duct piece. The device has the following technical effects: 1, local segment grouting simulation can be realized, the size of the matched model box is small, and less transparent soil, cement slurry and water glass slurry are required by the test, so that the test cost can be saved, and the test period can be shortened; 2, the transverse and longitudinal side lengths of a model box are not large, so that the visual advantage of the transparent device cannot be influenced by too long perspective depth; 3, the device is provided with a rotating bracket, so that the grouting condition of the grouting hole at any position on the segment ring of the actual engineering can be simulated; and 4, a matched test image measurement technology is high in precision, soil body motion information in a specified area range can be measured, and long-time continuous measurement can be carried out.

The invention discloses a method for reducing the content of poplar lignin with RNA interference in the field of biological technology; CCR gene segment is cloned from poplar and is used as an RNA interference segment, a constitutive promoter CaMV35S is used for promoting and expressing to construct an expression vector containing CCR gene front-back segments, agrobactrium tumefaciens is used for mediating, the front-back structure of the CCR gene is converted to the poplar, by the reactive plant PCR detection and the detection of lignin and holocellulose of transgenic poplar, the lignin content of the transgenic plant is reduced by 9.7 percent in an average way compared with the lignin content of the non-transgenic plant, the holocellulose content of the transgenic plant is improved 3.17 in an average way compared with the holocellulose content of the non-transgenic plant,, thereby providing a method for reducing the content of poplar lignin, so as to establish the basis for providing papermaking raw material in a large scale by utilizing the transgenic poplars.

The invention relates to a test system suitable for multi-split wire reversal fault research, which comprises a split wire module (1), a reaction frame (2), a torque loading disk (3), a loading moduleand a monocular measurement module, wherein the split wire module (1) comprises a plurality of parallelly-arranged long ropes (11), spacer bars (12) and clump weights (13); the reaction frame (2) isarranged at two ends of the long ropes (11) respectively for drawing and pulling the long ropes (11); the loading module comprises a hoister (5) arranged correspondingly to the torque loading disk (3), a bracket (6) with an adjustable height, a thin rope (7) and a force sensor (8); and the monocular measurement module comprises a high-frequency camera (4) and a computer (10). The test system has the beneficial effects that multiple parameters are adjustable; the applicable research range is wide; research on the split wire reversal mechanism and the reversal characteristics are done in view ofthe initial tension, the split number, the split circle diameter, the number of spacer bars, the span, and the like, and the applicable range is wide.

The invention relates to a flowing and heat transfer characteristic simulation device for a water-oil mixture in a regenerative cooling channel, and belongs to the field of flow and heat transfer characteristic simulation. The device consists of a storage tank, a filter, a constant flow pump, a flowmeter, a tee joint, a preheating section, a four-way joint, a secondary heating section, a cooling device, a filter, a back pressure valve, a kerosene recovery device, a gas-liquid separator, a wet gas flowmeter, a gas collection device, a liquid collection device, a measurement and control computer, a data acquisition device, a temperature sensor, a wall temperature sensor, a pressure sensor and a high-pressure gas source. The functions of accurate working medium input, segmented mixing, heating and product separation and collection are achieved, and the mixing and cracking of a kerosene and water mixture in a cooling channel of a scramjet engine can be simulated. The flowing and heat transfer characteristics of the kerosene and water mixture in the cooling channel of the scramjet engine are obtained. The device has the advantages of convenience in use, stable work, accurate working condition, good safety and the like.

The invention discloses a honeycomb type electric shock maze device replacing a water maze and a video analysis system, and relates to the technical field of animal experiment devices, and the honeycomb type electric shock maze device comprises a maze and a camera; the video analysis system comprises a controller, a computer, an experiment process operation module and a video analysis module, the camera is electrically connected with the controller through a wire, and the controller is electrically connected with the computer through a wire; and a plurality of paths through which the mouse can pass along the second silk screen and reach the labyrinth unit provided with the attractant are formed in the labyrinth. According to the maze device capable of replacing the Morris water maze, the experiment process does not depend on water any more, and therefore the application range of the water maze experiment is effectively widened; according to the invention, the experimental difficulty is reduced, the water source is saved, experimental result data of probing tracks, probing time, probing modes, electric shock times and electric shock time of rats and mice can be accurately calculated, the effectiveness of experimental results is improved, and the labor capacity of experimenters is reduced.

The invention provides a thermally-driven fire whirlwind simulation experiment device. The experiment device comprises an experiment device body and a liquid level constant maintaining mechanism; the experiment device body comprises an experiment table and a fire whirlwind simulation frame mounted on the experiment table, and the experiment table is provided with a mounting position for mounting a combustor; the liquid level constant maintaining mechanism comprises a liquid supplementing pool and a liquid storage pool for continuously supplementing liquid to the liquid supplementing pool, and the liquid supplementing pool is provided with an overflow port; and the liquid supplementing pool is communicated with the combustor through a connecting pipe. According to the thermally-driven fire whirlwind simulation experiment device, fuel can be supplemented into the combustor in real time through the liquid level constant maintaining mechanism, the fuel liquid level is maintained to be constant, and the combustion rate of fire cyclone is accurately calculated.