61results about How to "The experimental phenomenon is obvious" patented technology

A resonant image of using color light to excite surface plasma type consists of light source, modulation unit of incoming light angle, sample analysis unit, temperature control unit, detection unit, data collection and management unit. It is featured as applying composite-color light as excitation light source, using total reflection media-coupling to excite surface plasma of sensing film and to resonate with excited surface plasma for generating color image correlating to property of test sample.

The invention relates to a method for measuring the electrostriction coefficient of sinusoidal modulation multi-beam laser heterodyne second harmonic waves by utilizing a Doppler vibration mirror and particularly relates to a method for measuring electrostriction coefficient. The method is provided for solving the problems of low acquisition laser difference frequency signal quality and low signal processing computing speed of the existing laser heterodyne measuring technique in the measurement process of the electrostriction coefficient. In the method provided by the invention, the reflection surface of a second plane reflector is parallel to a thin glass plate; a vibration mirror starts simple harmonic vibration; an H0 solid laser is simultaneously turned on to adjust output voltage signals of a high-voltage power supply; simultaneously, a signal processing system continuously collects and processes electric signals which are output by a photoelectric detector to obtain the distance variable quantity between the second plane reflector and the rear surface of the thin glass plate, thereby obtaining the electrostriction coefficient of a piezoelectric ceramic pipe to be measured; and the method has the advantages that the quality of collected laser difference frequency signals is high and computation speed of signal processing computing is high. The method can be widely used in the fields of relative laser wind measuring radars and the like.

The invention provides a method for measuring Young modulus through Doppler vibrating mirror sinusoidal modulation of multi-beam laser heterodyne second harmonic and relates to a method for measuring Young modulus. The method is provided for solving the problem that when the existing laser heterodyne measurement method is adopted to measure the Young modulus, the collected laser difference frequency signals and the operation speed of signal processing are not ideal. In the method, a metal wire to be tested is hung on a fixed support to ensure that the metal wire is perpendicular to the reflecting surface of a plane mirror, a laser is opened while the vibrating mirror begins performing simple harmonic vibration; a signal processing system collects the signal output by a photoelectric detector to obtain the distance parameter of a thin glass plate and the plane mirror, the weight of weights is increased, the distance parameter of the thin glass plate and the plane mirror is obtained again, the extension length is obtained according to the obtained two distance parameters; and the Young modulus of the metal wire is obtained. The method has outstanding advantages that the collected laser difference frequency signals have high quality and the operation speed of signal processing is high.

The invention discloses a simulation device and method for a catalytic operation principle of artificial precipitation / snow enhancement. The simulation device comprises a high-voltage electrostatic dust removal device, an atomization chamber, a combustion chamber, a cloud chamber, a real-time image monitoring device and a display screen; the high-voltage electrostatic dust removal device is used for providing a clean airflow for the atomization chamber, and the airflow can transport water vapors generated by the atomization chamber to the cloud chamber; the atomization chamber is used for generating the clean water vapors; the combustion chamber is used for generating a silver iodide smoke agent by using silver iodide particles, and the silver iodide smoke agent is inserted into the cloudchamber through an injection hole in the outside of the cloud chamber; the cloud chamber includes a temperature monitor, a temperature controller and a snowfall particle sampling station, and the temperature controller is used for controlling the temperature of the cloud chamber; the snowfall particle sampling station is used for sampling generated ice crystal snows; the real-time image monitoringdevice is disposed in the cloud chamber, and is used for continuously collecting images in the cloud chamber and transmitting to the display screen for display.

The invention relates to an integrated tester for wave optics, wherein the tester is an integrated experiment teaching instrument. The tester is composed of a light source, an objective table, an optical screen, a vernier plate, and a dial. An optical screen track is welded to a support arm and is welded with the dial. When a handle is rotated, the dial and the optical screen track rotate together; an alpha vernier and a beta vernier are designed on the vernier plate in a diametric mode; and reticules of 0 degree to 360 degrees are marked on the periphery of the dial uniformly. When measurement is carried out, numerical values corresponding to the alpha vernier and the beta vernier are read and then averaging is carried out to obtain location of the optical screen, thereby achieving an objective of angle measurement. The tester is mainly used for demonstration of a two-slit interference experiment, a single-slit diffraction experiment, a circular hole diffraction experiment, an optical grating diffraction experiment as well as Malus law verification and brewster angle measurement and the like. The tester has advantages of convenient usage, clear experiment phenomena, convenient demonstration of optical path leakage, low cost, and precise measurement.

The invention relates to an ideal gas polytropic process experiment instrument, the instrument adopts a gas pressure sensor to collect the gas pressure signal in the air container, the pressure signalis converted into electric signal by analog-digital conversion, and the electric signal is amplified by amplifier. Finally, the voltage fluctuation image which varies with the gas pressure is displayed on the digital oscilloscope, and the computer is used for measurement and control, so that the precision and reliability of the numerical acquisition process are achieved and the experiment is simple and convenient.

The invention belongs to the technical field of electrostatic spinning, and relates to a teaching demonstration device for the electrostatic spinning. The teaching demonstration device mainly comprises an electrostatic induction machine with a discharge rod being removed, an injector metal bracket, an injector filled with a spinning solution, a wire, a hollow stainless steel needle, electrified jet flows or spinning fibers, a metal net collector and a collector metal bracket, wherein one end of the injector metal bracket is welded with a metal bar at the top of a leyden jar in the electrostatic induction machine with the discharge rod being removed; the other end of the injector metal bracket is used for fixing the injector; one end of the wire is connected with the injector metal bracket; the other end of the wire is connected with the hollow stainless steel needle mounted on an injector needle tube; one end of the collector metal bracket is welded with a metal bar at the top of another leyden jar in the electrostatic induction machine with the discharge rod being removed; and the other end of the collector metal bracket is welded with the metal net collector. The teaching demonstration device is simple in structure, reliable in method and principle, low in fabrication cost, good in demonstration effect, high in safety and environmentally friendly; and demonstration conditions are easy to achieve.

The invention discloses an energy conversion demonstration device for teaching. The demonstration device comprises a transparent container, a blade assembly, a power generation assembly and a light gathering assembly, wherein the transparent container is used for holding liquid and comprises a first outlet; the blade assembly comprises rotatable blades, and the rotatable blades are arranged at a place corresponding to the first outlet; the power generation assembly is connected with the blade assembly; and the light gathering assembly is used for gathering outside solar rays into a first beam and enabling the first beam to be radiated to the liquid in the transparent container. When the liquid is heated to a boiling state and turns into hot steam under irradiation of the first beam, the hot steam escapes from the first outlet, so that the ambient air around the first outlet is heated and expanded and moves upwards to drive the rotatable blades to rotate, and the rotatable blades rotate to drive the power generation assembly to generate power. Through the mode above, the provided demonstration device can visually reflect energy conversion.

The invention discloses a method and a device for demonstrating an incomplete combustion experiment. The method comprises the following steps of: (1) taking a plate-like combustible and rolling up the combustible into a conical combustible barrel of which the diameters of the two ends are different; (2) wedging the part, which is shorter than or equal to half of the barrel, of the end of with the smaller diameter of the combustible barrel into a fireproof barrel of which the shape is matched with that of the part; (3) tilting the combustible barrel, wherein the end with the smaller diameter is arranged at a high position; and (4) igniting the end with the larger diameter of the combustible barrel, and igniting smoke when the smoke appears on the end with the smaller diameter of the fireproof barrel. The method is simple and feasible, visible in experiment phenomenon, vivid, interesting and persuasive and can be widely applied to chemical teaching of junior and high middle schools and science education popularization.

The invention provides a method and a device for simulating the water bloom floatation of blue algae, belonging to the field of water environment. The device comprises a reaction column, a light source and a heating sink, wherein the light source and the heating sink are arranged at the top of the reaction column; the top of the reaction column is sealed aseptically; the outer surface of the reaction column is provided with an aseptic aeration inlet, a culture liquid inlet, an aseptic stirring airflow inlet and a circulating water inlet; the middle of the reaction column is provided with a sampling inlet; and the lower part of the reaction column is provided with a circulating water inlet. The method comprises the following steps: carrying out the amplification culture of algae species; sterilizing culture fluid and a simulating device; placing the culture fluid in the reaction column; inoculating the blue algae into the reaction column for sealing; setting environmental conditions; and then, periodically sampling to analyze and observe the floating characteristics of the blue algae. The method enables the algae to grow in aseptic environments and can effectively simulate the water bloom of the blue algae. The device has simple structure, small size, easy operation, strong removability, indoor and outdoor use, corollary use with an illumination culture box, convenient manufacture and low cost.

The invention provides a method for measuring Young modulus through Doppler vibrating mirror sinusoidal modulation of multi-beam laser heterodyne second harmonic and relates to a method for measuring Young modulus. The method is provided for solving the problem that when the existing laser heterodyne measurement method is adopted to measure the Young modulus, the collected laser difference frequency signals and the operation speed of signal processing are not ideal. In the method, a metal wire to be tested is hung on a fixed support to ensure that the metal wire is perpendicular to the reflecting surface of a plane mirror, a laser is opened while the vibrating mirror begins performing simple harmonic vibration; a signal processing system collects the signal output by a photoelectric detector to obtain the distance parameter of a thin glass plate and the plane mirror, the weight of weights is increased, the distance parameter of the thin glass plate and the plane mirror is obtained again, the extension length is obtained according to the obtained two distance parameters; and the Young modulus of the metal wire is obtained. The method has outstanding advantages that the collected laser difference frequency signals have high quality and the operation speed of signal processing is high.

The invention discloses a device and a method for measuring electrostrictive coefficients through linear frequency modulation multi-beam laser heterodyne and relates to the field of ultra-precise measurement. The device and the method for measuring the electrostrictive coefficients through the linear frequency modulation multi-beam laser heterodyne aim at solving the problem that the existing electrostrictive coefficient measuring method is low in measuring accuracy. An adjusting frame is used for fixing piezo-electric crystal with voltage to be measured; a second planar reflecting mirror is used for being fixed on one end surface of the piezo-electric crystal with the voltage to be measured; a thin glass plate and the second planar reflecting mirror are arranged in a parallel mode; laser sent out from a linear frequency modulation laser enters into the surface of the thin glass plate, the laser enters into the second planar reflecting mirror after being transmitted through the thin glass plate, and the laser is focused on the photosensitive surface of a photoelectric detector after being reflected through the thin glass plate. According to the device and the method for measuring the electrostrictive coefficients through the linear frequency modulation multi-beam laser heterodyne, the length variation amount of the piezo-electric crystal with the voltage to be measured is modulated within the frequency difference of intermediate frequency heterodyne signals, the length variation amount of a plurality of piezo-electric crystal with the voltage to be measured are obtained simultaneously due to measurement of the frequency difference, and the measuring error is 0.04 %. The device and the method for measuring the electrostrictive coefficients through the linear frequency modulation multi-beam laser heterodyne is applicable to ultra-precise measuring and detecting, device machining, laser radar system and the like.

The invention provides a method of directly using eyes to qualitatively detect Cu<2+> in a solution. The method comprises the following steps: terminal alkynyl functionalized mercaptan and terminal azido functionalized mercaptan are synthesized respectively; sodium citrate is used as a stabilizer to prepare gold nano-particles with the particle size of 14 nanometers; monomolecular layers of which the tail ends are provided with acetylene linkage and azide groups are self-assembled and formed on the surfaces of the gold nano-particles respectively by a ligand exchange method; the gold nano-particles subjected to two types of surface modification are mixed and added with blue vitriod and reducing agent; Cu(I) formed through reduction is taken as a catalyst, so as to allow the acetylene linkage to have cyclization reaction with the azide groups and cause the gold nano-particles to be accumulated; and the Cu<2+> in the solution is detected by observing the changes of the color and precipitation phenomenon of the gold nano-particles through naked eyes. The method can detect the existence of the Cu<2+> in a mixed solution with a plurality of metal cations. The method has characteristic of good function of detecting and identifying ions, obvious phenomenon and simple operation.

The invention discloses a multi-gas manufacturing device. The multi-gas manufacturing device comprises a gas generator, wherein the gas generator is provided with a reacting container, a liquid storage container and an auxiliary container. The multi-gas manufacturing device is characterized in that a sealing piston is arranged on the reaction container and communicated with an inlet and outlet, the inlet and outlet is communicated with a guide pipe and a branch pipe, the guide pipe and the branch pipe are connected with a main switch and an auxiliary switch respectively, the main switch is connected with the liquid storage container, and the auxiliary switch is connected with the auxiliary container. The multi-gas manufacturing device is simple in structure, convenient to manufacture, rapid to operate, safe, reliable, environmentally friendly, controllable and convenient to popularize.