34results about How to "Good for a wide range of applications" patented technology

The invention discloses a graphene aerogel material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a precursor solution, namely mixing graphene oxide with a framework filler, and stirring uniformly to obtain the precursor solution; (2) preparing graphene hydrogel, namely adding a catalyst into the precursor solution, stirring uniformly, then pouring into a mold containing reinforcing fibers, sealing the mold, and heating the mold for reaction, thereby obtaining fiber reinforced graphene hydrogel; (3) preparing graphene ketone gel, namely putting the graphene hydrogel into an acetone solution to perform solvent replacement so as to obtain the graphene ketone gel; and (4) preparing graphene aerogel, namely taking out the graphene ketone gel, and drying to obtain a fiber reinforced graphene aerogel material. The invention also relates to the graphene aerogel material prepared by the method, and the graphene aerogel material is low in heat conductivity and high in strength, and can be used as a high-temperature heat insulating material.

The invention relates to a graphene / silica composite aerogel material and a preparation method thereof. The preparation method comprises the following steps: 1, preparing a graphene oxide / silica system hydrogel; 2, preparing a graphene oxide / silica system alcogel; 3, preparing graphene oxide / silica composite aerogel; and 4, preparing the graphene / silica composite aerogel material. The graphene / silica composite aerogel material prepared through the preparation method has good high-temperature hydrophobic performance, and can tolerate a temperature of 400 DEG C or above, so the application range of silica composite aerogel is enlarged.

The invention discloses a multi-spectrum invisible anti-counterfeiting identifier and a detection device thereof, and a detection method thereof. The multi-spectrum invisible anti-counterfeiting identifier comprises an infrared absorption anti-counterfeiting pattern region made of infrared absorption ink, a macroscopic region made of common ink, and an ultraviolet excitation anti-counterfeiting pattern region made of ultraviolet excitation ink. The detection device is composed of a multi-spectrum micro-lens imaging unit and an image analysis unit; the multi-spectrum micro-lens imaging unit consists of a multi-spectrum micro-lens imaging lens, a mounting bracket, a full-spectrum light source, a CMOS sensor, and a focusing mechanism; the multi-spectrum micro-lens imaging lens is installed on the mounting bracket; the full-spectrum light source is installed on the mounting bracket; and the CMOS sensor is installed on the focusing mechanism. The multi-spectrum invisible anti-counterfeiting identifier has characteristics of good multi-anti-counterfeiting capability, high anti-counterfeiting level, high security and reliability, and good anti-counterfeiting effect. The anti-counterfeiting technique has the important application values in bill, currency, certificate, commodity, military, and security information fields.

The invention discloses a method for separating enriching metallic and semiconductor carbon nano-tubes from single-walled carbon nano-tubes. The method of the invention is that: first, purified carbon nano-tubes of 1 weight account that waits for separation and 0.05 to 2 weight accounts of separating accelerator are taken to be added into organic solvent for ultrasonic mixing and lead the separating accelerator to sufficiently adsorb the specific carbon nano-tube, then liquid and sediments are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching metallic carbon-tubes are acquired; next, 1 weight account of sediment and 0.05 to 2 weight accounts of the separating accelerator are taken to be added into the organic solvent for ultrasonic mixing processing, then sediments and liquid are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching semiconductor carbon tubes are acquired.

The invention discloses a self-assembly three-dimensional copper Raman enhanced substrate, and a preparation method and application thereof, and belongs to the field of Raman spectrum analysis. The raw material used by the method is relatively cheap copper; the application cost of an SERS (Surface Enhanced Raman Scattering) substrate is greatly reduced. Carbon points are used for replacing ordinary organic molecules to prepare a copper self assembly structure; the obtained copper substrate does not need special protection; the special treatment is not needed; the direct use can be realized. The prepared self-assembly three-dimensional copper can be stored for a long time in the air. The prepared self-assembly three-dimensional copper has a great number of SERS active sites; the detection limit on probe molecules (4-ATP) is 10<-8> mol / L. The prepared self-assembly three-dimensional copper Raman enhanced substrate has rich hot spots and ultrahigh stability; in addition, in the use process, any pretreatment is not needed; inactivation cannot occur after the placement in the normal temperature air for several months; the large range application of the Raman substrate and the large-range application of the Raman analysis technology are facilitated.

The invention relates to a method for identifying a face of a living body. The method for identifying the face of the living body comprises the following steps of (1) collecting the face image information; (2) generating at least one group of face image sequences from the face image information; (3) extracting the human face local features from the at least one group of human face image sequences;(4) screening out a low-dimensional feature vector of the face image information from the face local features; (5) inputting the low-dimensional feature vector into a trained classifier to carry outliving body face image recognition; and (6) outputting an identification result. Correspondingly, the invention further relates to a system for identifying the face of the living body. According to the method and the system provided by the invention, the face of the living body can be quickly and accurately identified, and the high requirement of the embedded equipment for the real-time performance can be met.

The invention discloses a colloidal gold test strip, which comprises an absorption pad, a nitrocellulose membrane, a gold-labeled pad and a sample pad that are sequentially laminated and pasted on a plastic lining board. The cellulose nitrate membrane is provided with a detection line and a quality control line; the gold-labeled pad is coated with colloidal gold-labeled monoclonal antibodies capable of identifying sulfonamides; the detection line is coated with a sulfonamide coating antigen; and the quality control line is coated with a goat or rabbit anti-rat IgG. The invention also discloses a usage method of the colloidal gold test strip and application of the colloidal gold test strip to detection of residues of sulfonamides. The colloidal gold test strip provided by the invention can be used for detecting residues of sulfonamides in tissue samples, such as milk, pork, chicken, beef, lamb, fish, shrimp, pork liver, chicken liver, egg and honey, etc.; and the colloidal gold test strip provided by the invention can simultaneously detect 16 sulfonamides, and has characteristics of high sensitivity, strong specificity, simple operation, fastness, accuracy and low cost.

The invention discloses a cooker with temperature measurement function. The cooker comprises a cooker base, heaters and a pan lining, wherein the heaters and the pan lining are on the cooker base; a temperature sensing LC oscillating circuit for sensing the temperature of the pan lining is arranged on the pan lining; a temperature identification module is arranged on the cooker base; the temperature sensing LC oscillating circuit comprises an oscillating coil L1 and a temperature sensing capacitor CT; the temperature identification module comprises a controller and an exciting / sensing coil L2; an exciting drive circuit, a state switching circuit and a frequency detection circuit are connected onto the exciting / sensing coil L2, and the exciting / sensing control of separated temperature measurement of the cooker is achieved. The cooker with the temperature measurement function is simple and convenient in arrangement; the temperature sensing LC oscillating circuit is in contact with an object to be measured; the sensitivity is high; the temperature identification module is not in contact with the object to be measured; the service lives of chips and components on the temperature identification module are easily prolonged.

The invention discloses a circuit board with a heat conduction structure. The circuit board comprises multiple layers of circuit boards, and is characterized in that at least one support body is mounted between every two adjacent layers of the circuit boards, so that a cavity is formed between the two layers of the circuit boards; the cavity is filled with a heat conduction medium; and the heat conduction medium and the support body form a heat conduction structure. According to the structure, heat dissipation of the circuit board is achieved through the heat conduction structure with a smallsize, so that lighting and thinning heat dissipation requirements of a small electronic device are met; and furthermore, the heat conduction structure is added without changing a circuit layout of theexisting circuit board, so that the design cost of the circuit board is not increased. The invention further discloses a fabrication method of the circuit board with the heat conduction structure. The fabrication method is simple to operate; and the fabricated circuit board has good heat dissipation characteristics.

The invention discloses a method for separating enriching metallic and semiconductor carbon nanometer tubes from single-walled carbon nanometer tubes The method of the invention is that: first, purified carbon nanometer tubes of 1 weight account that waits for separation and 0.05 to 2 weight accounts of separating accelerator are taken to be added into organic solvent for ultrasonic mixing and lead the separating accelerator to sufficiently adsorb the specific carbon nanometer tube, then liquid and sediments are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching metallic carbon-tubes are acquired; next, 1 weight account of sediment and 0.05 to 2 weight accounts of the separating accelerator are taken to be added into the organic solvent for ultrasonic mixing processing, then sediments and liquid are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching semiconductor carbon tubes are acquired.

The invention discloses an automatic load control terminal switching device of a dual-power-supply user. A main power supply terminal arranged at a main body (10) is connected with a main contact of a relay by a voltage transformer PT and a main supply circuit switch S1 and an auxiliary power supply terminal is connected with an auxiliary contact of the relay by the voltage transformer PT and an auxiliary circuit switch S2; the relay is connected with a voltage output port connected with a load control terminal; and a tripping coil TQ is connected with the auxiliary circuit switch S2 and the relay. An electric energy meter A communication module a is connected with the auxiliary circuit switch S2 and the relay; an electric energy meter B communication module b is connected with the main supply circuit switch S1 and the relay. The automatic load control terminal switching device has advantages of simple structure, low cost, low power consumption, convenience in installation, greatly reduced maintenance staff workload, saved enterprise costs and reduced field work security risk.

The invention provides a magnetically-braked noise-reducing high-pressure water rotating nozzle. The magnetically-braked noise-reducing high-pressure water rotating nozzle comprises a rotating head, a rotating shaft protection sleeve, a connecting magnetic component, a rotating shaft component and a shell. An eccentric hole is drilled in the rotating head, and the hollow rotating head is connected with the front end of the rotating shaft component in a threaded manner and comprises an outer layer made of titanium alloy and a middle layer made of a rubber noise-eliminating material. The rotating shaft component is fixedly connected with the connecting magnetic component in a threaded manner, a linear braking part is arranged outside the connecting magnetic component and is fixedly connected with the shell in a threaded manner, an annular step is arranged on the inner side of the shell, the rotating shaft component is mounted in the shell and comprises a hollow steplike rotating shaft and a hollow clearance seal rod mounted in the hollow rotating shaft, and the rotating shaft is fixed in the shell through a bearing. The magnetically-braked noise-reducing high-pressure water rotating nozzle has the advantages of better cleaning effect, simpler structure, good noise-reducing effect and long service life.

The invention discloses an infusion alarm and a control method thereof. The infusion alarm comprises a hanging ring, a hanging hook, a power source, a tension sensor, a signal conditioning circuit, a controller, a working panel and a loudspeaker and the like. A control system is mainly configured in a mode that the controller is utilized to compare signals collected by the tension sensor and conditioned by the signal conditioning circuit with a set alarming threshold value; when liquid is going to drip off, output of the tension sensor reaches the set alarming threshold value, and the controller controls the loudspeaker to give out an alarming sound to prompt nursing personnel or accompanying personnel to timely close an infusion device; when mass, of liquid, monitored by the tension sensor is not reduced within two minutes or is reduced by an amount smaller than or equal to 4g, an alarm is also given out to avoid medical accidents caused by influence on dripping or even normal treatment due to the fact that a pipeline of the infusion device is pressed or bent by a patient carelessly. The infusion alarm is low in cost, high in accuracy, small in size, convenient to use, high in reliability and convenient for large-scale application by medical institutions.

The signal processing structure and method applied to ultraviolet corona detection equipment belongs to the field of corona detection. In order to solve the signal processing problem of ultraviolet corona detection equipment based on ultraviolet photon counting image detectors, the structure includes: ultraviolet photon counting image detectors , a signal peak processing module, a photon splicing channel discrimination module, an analog-to-digital conversion module, a photon rate calculation module, an error message processing module, a transfer switch, a low-rate photon splicing module, a high-rate photon splicing module, a USB communication module and a package module; The photon splicing channel can be switched according to the current ultraviolet photon rate, which improves the environmental adaptability of the device and the response rate of the device under low photon rate. It has a self-test function to distinguish error information during system operation. It adopts USB communication and has more applicability. Strong, realizes the rapid and automatic detection process, greatly improves the production efficiency, and is conducive to the large-scale application of portable corona detection equipment in China in the future.

The invention relates to a pump body structure capable of improving the flow state of fluid in a vortex pump. The pump body structure comprises a body, wherein an inner cavity is formed in the body, a baffle tongue which is used for dividing the inner cavity into a water inlet vortex chamber and a water outlet vortex chamber is arranged in the inner cavity, a boss extends outwards from the upper part of one side surface of the body, a first arc surface which is arched outwards is formed at the edge of the bottom of the boss, a second arc surface which is arched inwards is formed on the side surface of the body on the top of a flow channel, the upper edge of the second arc surface is tangentially connected with the lower edge of the first arc surface, and streamline divergent sections which correspond to the first arc surface and the second arc surface are formed on the inner surface of the inner cavity. According to the pump body structure, the lower parts of the water inlet vortex chamber and the water outlet vortex chamber are tangent to an impeller channel, so that backflow and local resistance which are caused by space mutation as well as flow resistance caused by vortexes and flow separation of liquid working media at the boss are reduced, energy loss caused by interaction between vortexes of the liquid working media in the pump or between the vortexes and the wall surface is reduced, and the efficiency of the vortex pump is improved.

The invention discloses a graphene aerogel material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a precursor solution, namely mixing graphene oxide with a framework filler, and stirring uniformly to obtain the precursor solution; (2) preparing graphene hydrogel, namely adding a catalyst into the precursor solution, stirring uniformly, then pouring into a mold containing reinforcing fibers, sealing the mold, and heating the mold for reaction, thereby obtaining fiber reinforced graphene hydrogel; (3) preparing graphene ketone gel, namely putting the graphene hydrogel into an acetone solution to perform solvent replacement so as to obtain the graphene ketone gel; and (4) preparing graphene aerogel, namely taking out the graphene ketone gel, and drying to obtain a fiber reinforced graphene aerogel material. The invention also relates to the graphene aerogel material prepared by the method, and the graphene aerogel material is low in heat conductivity and high in strength, and can be used as a high-temperature heat insulating material.

The invention discloses an infusion alarm and a control method thereof. The infusion alarm comprises a hanging ring, a hanging hook, a power source, a tension sensor, a signal conditioning circuit, a controller, a working panel and a loudspeaker and the like. A control system is mainly configured in a mode that the controller is utilized to compare signals collected by the tension sensor and conditioned by the signal conditioning circuit with a set alarming threshold value; when liquid is going to drip off, output of the tension sensor reaches the set alarming threshold value, and the controller controls the loudspeaker to give out an alarming sound to prompt nursing personnel or accompanying personnel to timely close an infusion device; when mass, of liquid, monitored by the tension sensor is not reduced within two minutes or is reduced by an amount smaller than or equal to 4g, an alarm is also given out to avoid medical accidents caused by influence on dripping or even normal treatment due to the fact that a pipeline of the infusion device is pressed or bent by a patient carelessly. The infusion alarm is low in cost, high in accuracy, small in size, convenient to use, high in reliability and convenient for large-scale application by medical institutions.

The invention discloses a preparation method for coating oxide powder with an amorphous phosphate thin layer by soaking in mixed acid liquor. The specific operation scheme is as follows: firstly, mixing and stirring strong phosphoric acid, an additive and a dispersing agent are according to the ratio of (1-5000)[mu]L : (0.01-50)g : (10-500)mL to obtain mixed acid liquor; dispersing the oxide powder into the mixed acid solution according to a solid-to-liquid ratio of 1g : (1-100)mL, and stirring for a period of time (0.5-6 h) at a constant temperature (0-80 DEG C) to obtain slurry; and finally, carrying out suction filtration or centrifugation on the slurry to collect powder, washing with water and ethanol for 2-5 times, and drying to obtain phosphate-coated oxide powder. According to the invention, phosphoric acid is used as a phosphorus source, in-situ coating is realized by using one-step surface growth, a nano amorphous phosphate coating layer with controllable thickness is formed, and the phosphate-coated oxide material is prepared. The heat resistance, the oxidation resistance and the structural stability of the oxide material are improved, and the performance of the oxide is further improved.

The invention discloses a ceramizable phenolic aerogel and a preparation method thereof. The preparation method comprises the following steps: preparing a precursor solution, uniformly mixing the precursor solution, a ceramizable filler and an acid catalyst, pouring the mixture into a mold, and obtaining ceramizable phenolic aldehyde hydrogel after gelation and aging; demoulding the ceramizable phenolic aldehyde hydrogel, and then putting the ceramizable phenolic aldehyde hydrogel into a drying oven to carry out normal-pressure stepped heating drying, so as to prepare ceramizable phenolic aldehyde aerogel; the ceramizable phenolic aerogel disclosed by the invention has the advantages of lower heat conductivity coefficient, lower density, higher compression strength, higher residual carbon rate after high-temperature carbonization treatment, low cost, simple process and the like, and has a wide application prospect.

The invention discloses a colloidal gold test strip, which comprises an absorption pad, a nitrocellulose membrane, a gold-labeled pad and a sample pad that are sequentially laminated and pasted on a plastic lining board. The cellulose nitrate membrane is provided with a detection line and a quality control line; the gold-labeled pad is coated with colloidal gold-labeled monoclonal antibodies capable of identifying sulfonamides; the detection line is coated with a sulfonamide coating antigen; and the quality control line is coated with a goat or rabbit anti-rat IgG. The invention also discloses a usage method of the colloidal gold test strip and application of the colloidal gold test strip to detection of residues of sulfonamides. The colloidal gold test strip provided by the invention can be used for detecting residues of sulfonamides in tissue samples, such as milk, pork, chicken, beef, lamb, fish, shrimp, pork liver, chicken liver, egg and honey, etc.; and the colloidal gold test strip provided by the invention can simultaneously detect 16 sulfonamides, and has characteristics of high sensitivity, strong specificity, simple operation, fastness, accuracy and low cost.

The invention discloses a sound-producing device for measuring oil well liquid level depth, which belongs to the field of liquid level depth measuring devices. The invention particularly relates to the sound-producing device for measuring the oil well liquid level depth. The sound-producing device is gun-shaped; a handle is arranged below an outer sleeve of the sound-producing device; an air pipe is arranged in the handle; and one end of the air pipe is communicated with a pressure chamber of a rear end inner sleeve, while the other end of is connected with an input control valve. A right upper connecting platform, a right lower connecting platform, a left upper connecting platform and a left lower connecting platform are symmetrically milled on the left part and the right part of a top circle of the front end of the outer sleeve; a hook arranged below the front end of the outer sleeve is connected with a left upper linking arm and a left lower linking arm through lower pins; the front part of the hook is provided with a groove which is connected with a pivot lug welded at the lower end of a front gland; a rubber gasket is arranged in a ring groove of an inner hole of the front gland; and the middle part of the outer sleeve is provided with a ball valve. The sound-producing device has a simple structure, is easy for on-site operation and equipment management, is convenient to carry and convenient to use, and is suitable for field operation. A gas adopted by the sound-producing device causes no pollution to the atmospheric environment and is safe to use.

The invention relates to a solar battery-based passive positioning system. The solar battery-based passive positioning system comprises a light source control module, a light source, an anchor node, awireless data acquisition module and a data processing module, wherein the anchor node comprises a solar battery, a signal processing module, a current detection and metering module, an anchor pointcontrol module, a visible light communication demodulation module and a wireless communication module. The anchor node controls the modules and judges whether the variation quantity of an electric signal output by the solar battery is more than a set threshold value or not; and when the variation quantity of an electric signal output by the solar battery is more than the set threshold value, the anchor node activates the visible light communication demodulation module and the wireless communication module and commands the visible light communication demodulation module to demodulate a digitalsignal transformed by a light signal and identify the serial number of the light source; meanwhile, the wireless communication module of the anchor node and the wireless data acquisition module of thepositioning system are commanded to perform communication. Meanwhile, the invention provides a positioning method implemented by the above positioning system. A shadow link shielded by a positioningtarget is detected by the solar battery and the position information of the positioning target is acquired.

The invention relates to C-axis pore-forming graphite, an apparent particle structure of the C-axis pore-forming graphite is formed by basic layered structure units, the basic layered structure units have pores in the C-axis direction, and the C-axis pore-forming graphite is used as an embedded electrode active material and has high rate performance.

The invention discloses silicon carbide porous ceramic and a preparation method thereof. The preparation method comprises the following steps: mixing and ball-milling fine stone ore and carbon powder; pressing and molding a mixture, and heating the mixture in a constant-temperature carbon tube furnace for continuous operation at 1850-2000 DEG C to generate silicon carbide whiskers; carrying out wet mixing and ball milling on the silicon carbide whiskers, short carbon fibers, monatomic silicon and a binder by taking absolute ethyl alcohol as a ball milling medium; drying to obtain powder; and sieving the powder, heating and extruding to form a profile, putting the profile into a high-temperature vacuum hot isostatic press, gradually heating to 1900 DEG C, filling gaseous silicon while performing nitrogen protection, and preserving heat for 3 hours to obtain the silicon carbide fiber porous ceramic body. According to the invention, the chopped carbon fiber and the monatomic silicon are subjected to in-situ reaction sintering, and whisker growth and mutual bridging growth of the silicon carbide whisker in the heating process are realized, so that the green body is sintered into the densified silicon carbide porous ceramic with constant volume.

The invention relates to an information interaction system and method of an absolute type grating ruler, belongs to the measurement field of the absolute type grating ruler,, and aims at solving the problem that a present grating ruler collection system is low in information interactivity. A communication protocol conversion interface and the absolute type grating ruler transmit data to each other, the communication protocol conversion interface outputs information to an information collection module, and configuration information is input to the communication protocol conversion interface; an information reading module transmits information of the absolute type grating ruler to an information analysis module; an information configuration module receives configuration information of the information analysis module, and transmits the configuration information to the absolute type grating ruler; an information analysis module makes a request for accessing the absolute grating ruler to the information reading module, the information reading module reads information of the absolute type grating ruler, and transmits the information to the information analysis module, the information analysis module analyzes the data and configures the transmission configuration parameter of the information configuration module, and the parameter configuration module transmits configuration parameters to the absolute type grating ruler; and an analog signal conversion module receives analog increment signals of the absolute grating ruler, and outputs the analog increment signals to an oscilloscope.

The absolute grating ruler information interaction system and method belong to the field of absolute grating ruler measurement. In order to solve the problem of poor information interaction existing in the existing grating ruler acquisition system, the communication protocol conversion interface and the absolute grating ruler transmit data to each other and send information to the information acquisition module. Output information, input configuration information; information reading information of the absolute grating scale is transmitted to the information analysis module; the information configuration module receives the configuration information of the information analysis module, and then transmits the configuration information to the absolute grating scale; the information analysis module reads the information The fetching module makes a request to access the absolute grating scale, the information reading module reads the information of the absolute grating scale, and transmits the information to the information analysis module, the information analysis module analyzes the data, and transmits configuration parameters to the configuration information configuration module, parameter configuration The module transmits configuration parameters to the absolute grating ruler; the analog signal conversion module receives the analog incremental signal of the absolute grating ruler and outputs it to the oscilloscope.

The invention relates to a preparation method of a PDMS modified PUI hybrid material. The preparation method is characterized in that the preparation method comprises the following steps: 1, synthesizing a PDMS modified PUI perpolymer from raw materials comprising hydroxyalkyl terminated PDMS, specially structured diisocyanate and phthalic anhydride, mixing with polyhedral oligomeric silsesquioxane (POSS) and a curing agent, and curing at room temperature to obtain the hybrid material. The prepared material has the advantages of very good ultraviolet radiation and corrosion resistances, excellent heatproof performance and excellent mechanical performance, and can be used as an ultraviolet radiation and corrosion resistant protection material of spacecrafts. The preparation method has the advantages of simple reaction step and strong maneuverability, and is suitable for industrial production.