60results about How to "Easy to use and accurate" patented technology

Disclosed herein are portable handheld devices for saliva collection for daily monitoring of salivary biomarkers of physiological conditions, the device comprising: a handheld handle comprising a saliva collector, the saliva collector comprising: a suction tip; a bi-directional pump electrically configurable for pumping towards two opposite directions; a saliva reservoir; a valve; a water reservoir, the water reservoir comprising an external filling lid; a reversible fluidic connection configurable in a connected and disconnected position; and a base accommodating the handheld handle, the base configurable to fluidly communicate with the handheld handle through at least the reversible fluidic connection, wherein the valve is electrically configured to allow fluid communication directly between at least two selected from: the saliva reservoir, the water reservoir, and the reversible fluidic connection, and wherein the bi-directional pump is electrically configurable to allow fluid communication directly between the suction tip and the saliva reservoir.

The invention is suitable for the technical field of data pre-processing, and provides a text classification method for different subject topics. The method comprises the following steps of: A, performing word selection on each subject by using a chi-square test to form a feature vocabulary of the subject; B, performing subject classification on the selected feature words by using a Naive Bayes model; and C, performing secondary classification on first two structures with maximum probabilities given in the Naive Bayes model classification by using a support vector machine to obtain a first result. Through two-time classification, the average accuracy of classification is improved. The text classification method for different subject topics is simple to realize and operate, convenient and accurate to use and more accurate in classification between the subjects, and effectively improves the accuracy of classification between the adjacent subjects.

The invention discloses a method for displaying P91 and P92 ferrite heat-resistant steel original austenite crystal boundary. The P91 and P92 ferrite heat-resistant steel original austenite crystal boundary can be clearly and completely displayed through adopting an aqueous sulfuric acid solution electrolytic etching and concentrated nitric acid solution electrolytic etching combination two-step electrolytic etching technology in order to accurately determine the austenite grain size. The method has the advantages of simple, convenient, fast and safe operation, easy control of the etching process, stable display effect and good reappearance.

The invention discloses a rolling-up device for warp knitted fabrics. The rolling-up device comprises a first cloth roller which is rotatably arranged on a machine frame, and a fabric tension regulating mechanism; the fabric tension regulating mechanism comprises fabric guide roller mounting seats and connecting plates, an adjustable tension spring of a thread connecting pair, a first fabric guide roller, a second fabric guide roller, a sensor and an electric control device, wherein, the fabric guide roller mounting seats and the connecting plates are respectively arranged at the two sides of the machine frame, and the first fabric guide roller and the second fabric guide roller are arranged between the fabric guide roller mounting seats and are rotatably connected with the fabric guide roller mounting seats; one ends of the connecting plates are fixedly connected with the machine frame, and the other ends of the connecting plates are rotatably connected with the fabric guide roller mounting seats, the first fabric guide roller and the second fabric guide roller are respectively arranged at the upper side and the lower side of a rotating joint of the fabric guide roller mounting seats and the connecting plates, and the two ends of the adjustable tension spring are respectively connected with the upper end parts of the machine frame and the fabric guide roller mounting seats. The rolling-up device can prevent rolled fabric patterns from distortion and deformation, and the fabric tension regulating mechanism can accurately regulate the tension required by fabrics in rolling. The rolling-up device has the advantages of wide regulation range, simple and reliable structure and small occupation space.

The invention discloses a contour drawing mirror image positioning amplifier, which is characterized in that a mirror image reflector capable of moving parallel to a drawing board is arranged in front of the drawing board, and an isosceles triangle amplifying ruler and a sight distance rod are arranged in front of the mirror image reflector; the isosceles triangle amplifying ruler is installed on a horizontal sliding rod below the drawing board through a vertical connecting rod, and the horizontal sliding rod is externally provided with the sight distance rod. The contour drawing mirror image positioning amplifier adopts the mirror image reflector and the isosceles triangle amplifying ruler to carry out measurement and amplification on a mirror image directly, so that a drawing person is enabled to draw the shape contour of a scene or a building accurately according to a self determined proportion, and an error in the shape contour brought about by visual perception and estimation is avoided. Meanwhile, the time spent on contour drawing is further saved because of direct measurement and amplification without modification, thereby being capable of playing a good role for realistic drawing persons. The contour drawing mirror image positioning amplifier disclosed by the invention is scientific and reasonable in design, convenient and accurate in use, and applicable to contour positioning and amplifying for sketching, pencil sketching, color sketching of urban architecture scenery.

A grease gun with lighting function belongs to the technical field of manual lubricating oil supply equipment, including a gun head, a gun barrel, a handle, a pressure rod and a handle, an oil injection pipe is arranged on the gun head, and a grease nozzle is arranged on the head of the oil injection pipe; The air hole, the front end of the gun barrel is provided with a lighting device base, the lighting device base is provided with a lighting device, the lighting device is connected and fixed with the lighting device base through a bracket, the lighting device base and the gun barrel are connected by screw threads, and the tail of the gun barrel is also equipped with a rubber sleeve. The grease gun can be used conveniently and accurately in poor light conditions, which greatly improves the working efficiency of the grease gun.

The present invention provides a road and bridge construction measurement device. The problems are effectively solved that errors are large, labor intensity is high, the efficiency is low and economicbenefit is lost when manual length measurement is performed. The method provided by the invention reduces the consumption of raw materials, saves the labor and save the cost so as to improve the economic benefit. The method employs a mechanical structure to achieve measurement of the length of a steel strand with no need for electric energy so as to facilitate usage in the construction process, have convenient and accurate measurement and low worker labor intensity and be suitable for batch measurement of the steel strand, after the steel strand reaches a predetermined length, a runner can belocked and is not rotated, the length of the steel strand is a required length, and after the a structure on a graduated disc is set, the method can automatically obtain the steel strand with the required length.

The invention provides a ship bilge keel mounting bed-jig template applied to the technical field of ship bilge keel mounting auxiliary tools. The invention further relates to a ship bilge keel mounting method. One end of a template piece (1) of the ship bilge keel mounting bed-jig template is a locating arc part (2); one side of the template piece (1) is a bilge keel locating part (3); a concavepart (4) is arranged at the combined part of the bilge keel locating part (3) and the locating arc part (2); a step part (5) is also arranged on the bilge keel locating part (3); and the step part (5)divides the bilge keel locating part (3) into a first locating surface (6) and a second locating surface (7). According to the ship bilge keel mounting bed-jig template and the ship bilge keel mounting method, the structure is simple, the ship bilge keel and a ship-hull plate can be conveniently and accurately located and mounted, and it is important that the workload of the ship bilge keel mounting process is effectively reduced by changing the mounting time section of the ship bilge keel.

The invention relates to a special tool for restoring a seat hole of a machine of a haven, which is provided with a bend angle base, wherein a dovetail slide way seat of a machine tool is arranged on the bend angle base, a slide plate with a dovetail groove is arranged on a dovetail slide way on the dovetail slide way seat, a rotatable lead screw is arranged on the dovetail slide way seat which is matched with a screw sleeve below the slide plate, a motor with a speed reducer is arranged above the slide plate, an output shaft of the speed reducer is connected with a cardan shaft mechanism, the other end of the cardan shaft mechanism is connected with a long toolbar, and two adjusting racks are matched on the long toolbar. The invention has the effects that the special tool for restoring the seat hole of the machine of the haven is adopted to maintain the shaft hole of the large-sized loading and unloading equipment of the haven, such as the equipment of a portal hoist, a large-sized crane and the like, can carry out in-situ operation, does not need to completely disassemble the equipment, can carry out in-situ maintenance, is convenient to use, saves the time of disassembly, lifting and transportation and shortens the maintenance period. The expansion and contraction length of a cutter can be adjusted by using an adjusting bolt, and the use is convenient and accurate. The long toolbar can be superposed with the center of the seat hole to be processed by adjusting the bolts via the adjusting racks.

The invention relates to a composite polymerization inhibitor for extracting and rectifying conjugated diene with dimethylformamide, and a use method. The composite polymerization inhibitor is characterized in that the inhibitor comprise a component A and a component B, wherein the component A is a mixed solution prepared by dissolving 4-hydroxyl-2,2,6,6-tetramethyl piperidine-1-oxygen, 2-hydroxyl ethylamine and an adjuvant in toluene; a weight concentration of 4-hydroxyl-2,2,6,6-tetramethyl piperidine-1-oxygen in the mixed solution is 10-20%; a weight concentration of 2-hydroxyl ethylamine in the mixed solution is 20-40%; a weight concentration of the adjuvant in the mixed solution is 5.0-20%; the adjuvant is alcohol, propyl alcohol, isopropanol, isobutanol, tertiary butanol or phenethyl alcohol; and the component B is a sodium nitrite aqueous solution with a weight concentration of 10-30%. The components of the polymerization inhibitor have synergistic effects, the polymerization inhibitor has a good polymerization inhibition effect, is not deposited in a tower, is convenient and accurate to use, is not crystallized and is freeze-resistant in a low temperature environment, and the consumption of a solvent is low.

The invention provides a full-automatic grinding testing instrument which comprises a workbench, a guide rail arranged on the workbench, a sliding device arranged on the guide rail, a driving motor and a digital display device, wherein the driving motor is arranged on the workbench and connected with the sliding device, the digital display device is arranged on the workbench and corresponds to the sliding device and a first testing rod is arranged on the sliding device. By adopting the full-automatic grinding testing instrument, full-automatic accurate detection of combination firmness can be performed on the surface of a product, the quality of the product can be determined through the accurate detection of wear-resistant frequency of printing ink on the surface of the product and the use is convenient and accurate.

The cloth cutting device comprises a base, a bearing plate is arranged at the top end of the base, the bearing plate and the base are connected together in an inserted mode, electric push rods are arranged between the two sides of the base and the bottom face of the bearing plate, a control box is installed in the middle of the front face of the base, and a cutting frame is arranged on the upper surface of the bearing plate. The cloth tailoring device solves the problems that an existing cloth tailoring device cannot conveniently position cloth according to use requirements, so that deviation is prone to occurring in the cloth tailoring process, cloth waste is caused, and the existing cloth tailoring device is poor in flexibility and cannot be adjusted according to the use requirements of the existing cloth tailoring device. According to the cloth cutting equipment, the structure of the cloth cutting equipment is improved and optimized, so that the height of the cloth cutting equipment can be adjusted according to the use requirements of the cloth cutting equipment, a worker can conveniently use the cutting equipment at the use height suitable for the worker, and the worker can conveniently and easily work.

The invention discloses a height control device for interior decoration. The height control device comprises a fixed base, an adjusting plate is mounted at the upper end of the fixed base, the four corners of the bottom end of the adjusting plate are fixedly connected with lower threaded adjusting columns, adjusting handles are connected to the bottom ends of the lower threaded adjusting columns in threaded and inserted modes, upper threaded adjusting columns are connected to the bottom ends of the adjusting handles in threaded and inserted modes, fixing plates are symmetrically and fixedly connected to the upper end face of the adjusting plate, an adjusting main body is mounted between the fixing plates, measuring devices are symmetrically mounted on one side of the adjusting main body, astorage box is mounted on the upper part of one end of the adjusting plate, a transmission rod is mounted in the middle of the adjusting main body, the end of the transmission rod is fixedly connected with an adjusting hand wheel, a bearing is mounted inside the adjusting hand wheel and mounted on the transmission rod, and bevel gear sets are symmetrically mounted on the transmission rod. The height control device is convenient and fast to use, synchronous control and adjustment can be achieved, and thus height adjustment and control are more accurate.

The invention discloses an intelligent voice scene prompt panel switch which comprises a shell body, an upper surface of the shell body is provided with a touch induction press key, a lower end of the touch induction press button is provided with a backlight indicating lamp, a lower end of the backlight indicating lamp is provided with an intelligent voice prompt mechanism, a PCB circuit board is arranged in the shell body, a 3V auxiliary power source is arranged on the PCB circuit board, an upper end of the 3V auxiliary power source is provided with an intelligent MCU micro-computer control chip, a lower end of the 3V auxiliary power source is provided with an oscillator, a left side and a right side of the 3V auxiliary power source are respectively provided with a power source voltage converter and a digital coding circuit chip, and a lower end of the digital coding circuit chip is provided with a signal emitting device; the digital coding circuit chip is electrically connected with the touch induction press key, the backlight indicating lamp, the PCB circuit board, the 3V auxiliary power source, the intelligent MCU micro-computer control chip and the signal emitting device. The beneficial effects of the intelligent voice scene prompt panel switch are that the intelligent voice scene prompt panel switch is simple in structure and strong in practicality.