35results about How to "Comprehensive experiment" patented technology

The invention relates to a wireless personal digital assistant (PDA) and database-based experiment evaluation system. The system comprises a background server, a wireless router, a card swiping subsystem and a client consisting of a local area network (LAN) PC, a plurality of campus network (CN) PCs and a wireless PDA, wherein the background server, the LAN PC, a card swiping PC and the wireless router are connected to the experiment centre LAN; an IC card reader is connected to the card swiping PC through a USB interface; the CN PCs are connected with the CN; and the experiment centre LAN is connected with the CN. A wireless PDA and database-based experiment evaluation method comprises the following steps of: swiping cards by students, logging on to a WWW server, querying student information, selecting a student and an experiment project, querying evaluation standard information, estimating experiment and the like. With an evaluation standard, the system and the method have the advantages of strictness and consistency, more comprehensive evaluation indexes, convenient arrangement of experiment results and the like, and create conditions for the complete opening of the laboratory.

The invention relates to a multifunctional integrated special electrostatic spinning machine for a laboratory. The machine comprises a laboratory operating desk, an injecting mechanism, a receiving mechanism and an injecting angle adjusting mechanism; the injecting mechanism comprises a horizontal position adjusting unit and an injecting barrel; the injecting angle adjusting mechanism comprises a mounting frame, an adjusting supporting frame, adjusting vertical frames and angle adjusting hand wheels; the front end of the adjusting supporting frame is mounted on the mounting frame; the injecting mechanism is mounted on a bottom plate of the adjusting supporting frame; the adjusting vertical frames are symmetrically mounted at two sides of the adjusting supporting frame; gears which are engaged with arc-shaped adjusting holes in the adjusting vertical frames are mounted on two side plates of the adjusting supporting frame; the gears move in the arc-shaped adjusting holes through the angle adjusting hand wheels mounted on the outer sides of the gears; the receiving mechanism is composed of a receiving roller and a receiving plate. The multifunctional integrated special electrostatic spinning machine for the laboratory has the advantages that the injecting position and angle can be adjusted; the injecting materials of different physical performances apply; the experiment cost is small, the scientific layout of the laboratory is realized, and various receiving modes are brought.

The invention discloses an intermittent-motion-pair-mechanism-contained comprehensive test bench for nonlinear dynamic characteristics. A sleeve sleeves a second rotating shaft; one motor drives the second rotating shaft to rotate or to be locked; and the other motor drives the sleeve to slide along the second rotating shaft. According to the invention, a changing rule of mechanical characteristics between motion pair elements under conditions of different clearances, different rotating speeds and relative horizontal planes is obtained. With the test bench, switching among a cylindrical pair,a sliding pair and a rotating pair is realized and relevant nonlinear dynamic characteristics testing is carried out.

The invention discloses a modularized plant photosynthetic detector, and particularly relates to the field of photosynthetic detection.The modularized plant photosynthetic detector comprises a control case and a detector body, the control case is arranged at one end of the detector body, a touch control integrated screen is arranged in the control case, a Dam data acquisition and analysis program, a field load network, a wireless air interface NBIot, an embedded computer IotGW, a sensor interface module IotNode and a mariaDB database are sequentially arranged in the touch control integrated screen, and a leaf chamber body is arranged on one side of the exterior of the control case. According to the invention, an embedded computer IotGW is used for uploading to the interior of a Dam data acquisition and analysis program, the Dam data acquisition and analysis program is used for analyzing and calculating, then experimental data is uploaded to a mariaDB database, the Dam data acquisition and analysis program can call out the experimental data stored in the mariaDB database at any time, and compared with the prior art, the experiment can be more perfected.

The invention discloses a trigger unit single event upset effect experimental verification circuit. The trigger unit single event upset effect experimental verification circuit comprises a high / low level generating circuit, a shift register chain A, a shift register chain B, a comparison circuit and a high level detection circuit, wherein a clock signal is input through the input end of the high / low level generating circuit; the shift register chain A and the shift register chain B are equal in shift register cascade stages; the comparison circuit and the high level detection circuit are connected in sequence; the high / low level generating circuit is used for generating periodic high and low level signals which are simultaneously input into the shift register chain A and the shift register chain B according to a clock signal; the clock input end of each register in the shift register chain A and the shift register chain B is connected with the clock signal respectively; the data output end of the shift register chain A and the data output end of the shift register chain B are connected to the two input ends of the comparison circuit respectively; when the states of data input into the two input ends of the comparison circuit at the same moment are consistent, the output end of the comparison circuit outputs a low level; when the states of data input into the two input ends of the comparison circuit at the same moment are inconsistent, the output end of the comparison circuit outputs a high level; the high level detection circuit is used for identifying the output signal of the comparison circuit and counting the high level.

The invention discloses an anti-seismic experimental device for assembled bridge engineering, which comprises a base, a movable seat and a first installation warehouse, a fixed warehouse is fixed at the middle position on the top of the base, and a second installation warehouse is installed on the outside of the fixed warehouse. Two toothed rings, and a movable seat is arranged inside the fixed warehouse, and a first annular chute is opened on both sides of the top of the base. This kind of anti-seismic experimental device for assembled bridge engineering is through the meshing connection between the first gear and the second gear ring and the first gear ring, and the meshing connection between the first gear ring and the second gear, so that the second When a motor drives the second rotating shaft to rotate, it can make the first rotating shaft continue to do planetary motion, and then drive the movable seat to shake in multiple directions, so that multi-directional vibration experiments can be carried out in a single time, and the bridge model on the placement plate can be further multiplied. Azimuth vibration, so that it is more in line with the actual use situation, and more comprehensive experiments can be carried out.

The invention relates to an assembled steel structure joint experiment device, which effectively solves the problem of lack of device comparison experiments for existing bolted welded joints and bolted joints; the technical solution includes a housing with clamping and pressure devices, The clamping device includes a pull plate slidingly matched with the shell, and the shell is rotatably matched with a clamping rod. There are two threads on the clamping rod that are respectively matched with the pull plate. The two rotating columns are fixed with fixed seats, and the two fixed seats are threaded to match the top column, and the bottom of the fixed seat is rotated to match the turbine, and the two turbines are threaded with the top column; there are two columns on the shell, and the upper columns are rotated Cooperate with the worm, when the rotating column rotates, the turbine can mesh with the worm; there is a cylinder on any column, one end of the cylinder is connected to the air pump, the cylinder slides and cooperates with the push plate, the worm coaxially fixes the gear placed in the cylinder, and the push plate is fixed with a The gear rack is meshed with the gears; the invention has ingenious structure and good experimental effect.

The invention discloses an indoor detecting probe of fluorescent solution concentration. The probe comprises an exciting light source part and a fluorescent induction part which are oppositely arranged. The exciting light source part comprises a lower plate lens. A UV lamp is arranged below the lower plate lens. The fluorescent induction part comprises an upper plate lens. A narrow-bandpass filter is arranged above the upper plate lens. A photosensitive resistor is arranged above the narrow-bandpass filter. The lower plate lens and the upper plate lens are coaxially and oppositely arranged. Fluorescent signals of trace concentration can be captured, the fluorescent solution concentration can be conveniently and rapidly measured through the fluorescent characteristics of a fluorescent agent, and sensitivity is high. The indoor detecting probe is small in size, stable in structure, low in price, high in detection precision and particularly suitable for low-concentration fluorescent solutions, can rapidly detect fluorescent diluent concentration, and can adapt to detection of concentrations of various fluorescent agents.

The invention discloses an expressway roadbed large-grained stone tamping test device which comprises an experiment frame, a supporting frame is fixedly connected to the experiment frame, two sliding blocks are slidably connected to the supporting frame, two rotating shafts are rotatably connected to the two sliding blocks, a box is fixedly connected between the two rotating shafts, the two ends of the box are open, and a balancing weight is slidably connected into the box. Placing grooves are formed in the two ends of the inner wall of the box body, fixing assemblies are arranged in the two placing grooves, shells are fixedly connected to the two ends of the box body, sliding plates are slidably connected into the two shells, a square pipe is fixedly connected to one side of a sliding block, a connecting rod is slidably connected into the square pipe, and one end of the connecting rod is rotationally connected with an extrusion plate. According to the device, by arranging the rotating extrusion plate, the device can tamp an arched cambered surface, during tamping, the box body is kept in a vertical state, the impact effect of the balancing weight on the sliding plate is not affected, the tamping effect on a roadbed material in an experiment frame is best, and the efficiency is improved.

The invention relates to an impact vibration test device of top coal gangue and application of the test device. The test device comprises a pedestal, and a shake table device, a support assembly, a coal releasing device and a high speed camera assembly arranged on the pedestal, the shake table device is arranged in the bottom of the support assembly, the coal releasing device is arranged on the support assembly and positioned over the shake table device, and the high-speed camera assembly is positioned in one side of the support assembly and arranged in parallel with the shake table device. Coal gangue particles are placed in the coal releasing device, the coal releasing device releases the coal gangue particles, the coal gangue particles fall on the shake table device successively, the high speed camera assembly obtains an instant image when the coal gangue falls on the shake table device, and a sample of the falling coal gangue and different parameters of the shake table device afterfalling are obtained to implement subsequent data analysis. The test device is ingenious in structural design and less influenced by the external environment, the test feasibility is high, labor is not needed, a test process is accurate with little error, and the popularization value is very high.

The invention relates to a pathogen antibody preparation method. The method includes eight important steps, and a preparation process is defined step by step. The pathogen antibody preparation method has advantages that comprehensiveness in consideration and experiment is achieved, preparation preconditions are defined in the pathogen antibody preparation method, and stored parameter conditions are tested through experiments to realize better application to practical conditions.

The invention provides a plate electrode device for measuring electric characteristics of oil flow. The device comprises an insulating shell and a metal aluminum electrode. An oil passage is formed in the insulating shell. Inwards-sunken grooves are formed on the end faces, where the inner sides of the oil passages are, of the insulating shell. The metal aluminum electrode comprises an upper electrode and a lower electrode. Each electrode comprises a main body and a column body which is extended upwards from the main body. Through grooves are filled with the column bodies of the metal aluminum electrode. The grooves are filled with the main bodies of the metal aluminum electrodes. An oil paper sample is positioned in the oil passage, and is fixed by oil paper fixing parts. The plate electrode of which the lower electrode is adjustable in height is embedded into the closed insulating shell, the position of the oil paper sample in the oil passage is adjusted by the oil paper fixing parts, and external accessories are matched, so that alternating current voltage, direct current voltage and alternating current-direct current voltage can be applied, an interval between the two electrodes is adjustable, the position of the oil paper sample in the oil passage is adjustable, and experimental researches on the electric characteristics of the oil flow of a transformer are diversified and targeted.

The invention relates to the field of rock mechanics experiments, in particular to a multi-dimensional dynamic and static combined loading rock mechanics experimental device, including a workbench, an adjustment mechanism, a one-dimensional horizontal dynamic and static combined loading mechanism, a lifting mechanism and a two-dimensional dynamic and static combined loading mechanism, and a one-dimensional horizontal dynamic and static combined loading mechanism. The combined dynamic and static loading mechanism includes a dynamic loading component and a static loading component, and the two-dimensional dynamic and static combined loading mechanism includes a moving component, a horizontal loading component and a vertical loading component. The invention can carry out experiments in different dimensions by controlling the combined work of the dynamic load component, the static load component, the horizontal load component and the vertical load component, and adjust the one-dimensional horizontal dynamic and static combination through the adjustment mechanism, the lifting mechanism and the moving component. The location of the loading mechanism and the two-dimensional dynamic and static combined loading mechanism facilitates fixing and experimenting on rocks of different sizes, and further improves the experiment.

The present disclosure provides a rotary reversing valve, a rotary hydraulic vibration platform of a block forming machine and a method thereof, based on a matched valve body and a valve core, the valve core can rotate in the valve body, and the valve core located inside the valve body The upper and lower ends of the valve core are respectively provided with bearings, the valve body is provided with a hollow valve chamber, the inner edge of the valve chamber is provided with bearing grooves at positions corresponding to the bearings, and the inner edge of the valve chamber is provided with different valves at different positions. Oil port, the valve core is provided with several oil passages, by controlling the rotation position of the valve core relative to the valve body, the relationship between different oil passages and oil ports can be changed, the oil flow direction can be changed, and the transmission of oil in different oil ports can be realized. The direction can be reversed multiple times in one rotation cycle, which greatly increases the vibration frequency.

The invention discloses a high-voltage discharge experiment box comprising a box body, a DC discharge experiment area used for carrying out a high-voltage DC related discharge experiment under the control of a DC high-voltage experiment starting switch, and an AC discharge experiment area used for carrying out a high-voltage AC related discharge experiment under the control of an AC high-voltage experiment starting switch, wherein a DC flexible transfer switch is arranged in a DC discharge experiment area, and an AC flexible transfer switch is arranged in an AC discharge experiment area so that AC and DC high voltage can be transferred to different discharge circuits, and a plurality of high-voltage insulation experiments, such as DC arc, man-made lighting, AC space, creeping discharge, and the like and various high-voltage insulation experiments, can be carried out in one experiment box. The invention has the advantages of low cost, strong functions, rich experiments, obvious experiment phenomena, simple use and relative safety, and provides equipment basis for researching theory and phenomena of high-voltage discharge.

The invention relates to an experimental device and method for detecting the preference of an animal to a static electric field direction. The device comprises an operation display panel, a signal controlling and processing unit, an image obtaining and processing unit, a voltage generating unit and an electric field exposure unit. The signal controlling and processing unit is connected with the operation display panel, the image obtaining and processing unit and the voltage generating unit, the electric field exposure unit is connected with the voltage generating unit, and the image obtaining and processing unit is arranged above the electric field exposure unit; in an experiment, the voltage generating unit sends out a voltage signal to be applied to the electric field exposure unit according to an instruction of the operation display panel, the image obtaining and processing unit obtains information of movement images of the animal in the electric field exposure unit and feeds back the information to the signal controlling and processing unit, and the information is displayed in the operation display panel. Compared with the prior art, the device and method have the advantages of being simple to operate, high in safety, capable of generating electric fields in different directions and sizes, visual in result and the like.

The invention relates to a multifunctional integrated special electrostatic spinning machine for a laboratory. The machine comprises a laboratory operating desk, an injecting mechanism, a receiving mechanism and an injecting angle adjusting mechanism; the injecting mechanism comprises a horizontal position adjusting unit and an injecting barrel; the injecting angle adjusting mechanism comprises a mounting frame, an adjusting supporting frame, adjusting vertical frames and angle adjusting hand wheels; the front end of the adjusting supporting frame is mounted on the mounting frame; the injecting mechanism is mounted on a bottom plate of the adjusting supporting frame; the adjusting vertical frames are symmetrically mounted at two sides of the adjusting supporting frame; gears which are engaged with arc-shaped adjusting holes in the adjusting vertical frames are mounted on two side plates of the adjusting supporting frame; the gears move in the arc-shaped adjusting holes through the angle adjusting hand wheels mounted on the outer sides of the gears; the receiving mechanism is composed of a receiving roller and a receiving plate. The multifunctional integrated special electrostatic spinning machine for the laboratory has the advantages that the injecting position and angle can be adjusted; the injecting materials of different physical performances apply; the experiment cost is small, the scientific layout of the laboratory is realized, and various receiving modes are brought.