48results about How to "Avoid precision requirements" patented technology

The present invention provides a rotation apparatus, a rotor type compressor applying the rotation apparatus, and a fluid motor applying the rotation apparatus. In the rotation apparatus, a rolling bearing manner is adopted between an eccentric shaft and a rolling piston wheel, reliable sealing of a cylinder is achieved through elastic pre-tightening force, and improvement is performed on a valve rotating body and a valve rotating body reset mechanism.

An imaging device comprising at least three image capturing apparatuses is provided. Each apparatus includes a lens system and a sensor and is configured to produce an image. The device further comprises a processor configured to combine at least a portion of the images with each other to produce a colour image. Each lens system comprises a phase mask which modifies the phase of incoming rays of light such that distribution of rays after the lens system is insensitive to the location of the sensor.

The invention relates to a conversion valve. A hollow inner wall of a valve body is in interference fit with a ceramic valve sleeve; a ceramic valve core is driven by a top motor; a shifting block is used for limiting; the middle part of the valve body is provided with a water inlet, a water outlet, an upper drain pipe and a lower drain pipe; the periphery of the valve core is provided with a ring-shaped concave water collecting tank; the valve core is in integrated clearance fit with the valve sleeve; the position of the upper drain pipe corresponds to the water collecting tank; and the position of the lower drain pipe corresponds to a lower water collecting cavity. The integrated ceramic valve core of the invention has the advantages of reasonable structure, convenient assembly, high installing efficiency and low manufacturing cost, and capability of greatly improving the reliability of the conversion valve and prolonging the service life of the conversion valve.

This invention relates to a flexible wall penetration device to measure penetration parameters, which comprises the following structure: the confined pressure pipe, drainage pipe, water-in pipe are separately controlled to join the penetration pressure room; the confined pressure pipe and the drainage pipe and the water-in pipe are separately connected the pressure meter, air adjusting valve, pressure supply device and B-part changing pipe, pressure meter, air adjusting valve, supply device and C changing tube, pressure meter, air adjusting valve, supply device, air adjusting valve water box exit

The invention discloses a welding method for an annular header, which is capable of greatly reducing stress concentration. According to the welding method, all oblique nozzles are arranged and fixed at first, and then welding is started; and welding is divided into three steps: 1, fixed-position welding, wherein tungsten inert gas welding is adopted in the fixed-position welding, two sections of connected arc welding areas are arranged at the butt-joint part of each adjacent oblique nozzles and have different arc lengths, the relatively long arc welding area is a first arc welding area, and the relatively short arc welding area is a second arc welding area; 2, backing welding, wherein tungsten inert gas welding is adopted in the backing welding, the annular header is provided with six welding areas in total, which are a welding area A, a welding area B, a welding area C, a welding area D, a welding area E and a welding area F, and the six welding areas are clockwise arranged; and 3, welding seam-filling welding, wherein welding is carried out by virtue of a manual electric arc welding method in the welding seam-filling welding, odd layers and even layers are reversely welded, and so on, until the filling welding is completed. The welding method disclosed by the invention has the advantage of basically no stress concentration.

The invention discloses a home-use self-made beverage concentration measuring method, and relates to the field of a kitchen tool. The method comprises the following steps of firstly collecting the deviation distance of first light rays emitted from a first light emission module on a second light receiving module after the refraction generation through passing through a solution to be tested in a first right-angle trapezoidal sink hole formed in the bottom of a concentration measurement instrument; then, solving the refractive index of the solution to be tested according to the deviation distance, the first distance and the incidence angle; then, obtaining the concentration of the solution to be tested according to the refractive index of the solution to be tested, the solute information ofthe solution to be tested, and the solvent of the solution to be tested. The precision requirement of the solution proportioning ratio of the weighing method is avoided; the precision of the concentration of the prepared solution is improved; meanwhile, the requirement of manual conversion for concentration solving by a weighing method is not needed; for evaporation effects or non-quantitative feeding effects, the solution concentration can be obtained again.

The invention discloses a sewage pump station water level prediction method base on neural network. The method comprises the steps of: firstly selecting prediction model variables including input variables and output variables, wherein input variables include an upstream pump station lifting capacity, forebay liquid level variable quantity, pump station discharge rate and switch pump liquid levelcontrol setting quantity and the output variables include a pump station forebay water level; secondly normalizing the data; then setting up a BP neural network framework and training the BP neural network; and finally carrying out denormalization on the data of the neural network. The method has higher prediction accuracy compared with the traditional steady flow computing method.

A Nb based on layer-by-layer stacking 3 The preparation method of Al superconducting precursor wire mainly includes: A. Preparation of Nb-Al composite sheath: Nb foil and Al foil are alternately stacked in the rectangular groove of the tubular Nb box from bottom to top, and the upper cover is covered , in the Cu tube, welded and sealed; B. Preparation of Nb-Al single mandrel: the Nb-Al composite sheath is hydrostatically extruded, repeatedly drawn, and then corroded to remove the copper to obtain the Nb-Al single mandrel. Mandrel; C, Nb 3 Preparation of Al superconducting precursor wires: multiple Nb‑Al single mandrels are packed closely into Cu or Cu alloy sheaths, and multi-cores are obtained by electron beam sealing welding, hydrostatic extrusion, and repeated drawing. Wire rod; then corrode to remove copper. The method is simple to operate, the assembly filling rate of the foil material is high, and the compactness of each layer of foil material is uniform. The final superconducting wire prepared by it has good performance, strong consistency and high qualified rate. It is especially suitable for the preparation of long superconducting wires.

The invention discloses a stage lamp. The stage lamp comprises a lamp bulb assembly for emitting light, and further comprises a fixing plate and regulating devices, wherein the regulating devices comprise a first regulating device and a second regulating device; the lamp bulb assembly is mounted on the second regulating device; the first regulating device can move in parallel relative to the fixing plate in a first direction and is connected with the fixing plate; the second regulating device can move in parallel relative to the first regulating device in a second direction and is connected with the first regulating device; the first direction is perpendicular to the second direction. Through arrangement of the two regulating mechanisms, the positions of the lamp bulb assembly in two different directions on the same horizontal plane can be regulated, so that errors caused in the mounting and machining processes are overcome.

The invention discloses a liquid plastic thin-walled sleeve fixture with a material return mechanism, which includes a fixing device, a pushing mechanism connected in the fixing device, a linkage clamping mechanism and a linkage ejection mechanism, and the fixing device consists of The fixed guide frame is composed of a transition plate and a clamp body fixedly connected by bolts; the pushing mechanism is composed of a pull rod connected to a slanting block, the slanting block is located inside the fixed guide frame, and the front end of the pull rod is connected to the slanting block, The middle part is connected through the transition plate, the upper end of the inclined block is slidingly connected with the linkage clamping mechanism, and the lower end is rollingly connected with the linkage ejection mechanism; the linkage clamping mechanism and the linkage ejection mechanism are connected to the workpiece. The present invention adopts the structural form in which the push mechanism, the linkage clamping mechanism and the linkage ejection mechanism work together, and combines the flexible clamping function of the liquid plastic to improve the centering accuracy of the workpiece, reduce the workload of workers and machines, and improve the work efficiency.

The invention discloses a device for measuring sensitivity of a wave detector in a reception direction of elastic waves. The device comprises a water tank filled with water, wherein a shock absorption material is stuck at the inner side of the wall of the water tank; a support device is arranged on the water tank; rotating shafts at two ends of the support device are respectively connected with corresponding walls of the water tank; a universal joint is arranged at the middle position of the support device; a wave detector is arranged in the universal joint; the universal joint is connected with a counter weight through a connecting rod I; an electric spark emission probe is arranged at the position of the central line of the support device which is located at the upper side of the support device and below a water body; and a dial is arranged at the outside of the wall of the water tank. Due to the universal joint and the counter weight in the invention, a receiving surface of the wave detector is guaranteed to always keep horizontal when the rotating shafts are rotated for different angles; as the water tank and the support device are coated by rubber, the problem of reflected waves is solved; a lower cross rod is protruded out towards the electric spark emission probe to reduce interference from the reflected waves of the rod to the wave detector. The device for measuring sensitivity of the wave detector in the reception direction of elastic waves, disclosed by the invention, has an advantage of measuring sensitivity of the wave detector in the reception direction of elastic waves.

The invention discloses a home-use self-made beverage concentration measuring method, and relates to the field of a kitchen tool. The method comprises the following steps of firstly collecting the deviation distance of first light rays emitted from a first light emission module on a second light receiving module after the refraction generation through passing through a solution to be tested in a first right-angle trapezoidal sink hole formed in the bottom of a concentration measurement instrument; then, solving the refractive index of the solution to be tested according to the deviation distance, the first distance and the incidence angle; then, obtaining the concentration of the solution to be tested according to the refractive index of the solution to be tested, the solute information ofthe solution to be tested, and the solvent of the solution to be tested. The precision requirement of the solution proportioning ratio of the weighing method is avoided; the precision of the concentration of the prepared solution is improved; meanwhile, the requirement of manual conversion for concentration solving by a weighing method is not needed; for evaporation effects or non-quantitative feeding effects, the solution concentration can be obtained again.

The invention discloses an intelligent water cup for measuring the concentration of saline water and sweet water for a kitchen, and relates to a kitchen tool. The intelligent water cup comprises a cupbody, a first light emitting module, a second light receiving module and a main controller. The cup body comprises a first containing cavity for containing a solution. The first light emitting moduleand the second light receiving module are arranged on the first end face and the second end face outside a first light channel in the first containing cavity respectively. The first output end of themain controller is connected with the first light emitting module. The second light receiving module is connected with the second input end of the main controller. The main controller comprises a first light emitting control module, a refracted light receiving module, a refractivity solving module and a solution concentration solving module. The requirement for the precision of the solution proportioning of a weighing method is avoided, and the precision of the concentration of the prepared solution is improved; meanwhile, unlike the weighing method where the concentration needs to be obtained through artificial conversion, the concentration of the solution can be obtained again after the evaporation effect or the non-quantitative feeding effect.

The invention relates to a sealing anti-scalding type microwave fresh-keeping ceramic container, which comprises a ceramic container body and a container cover, wherein the container cover is provided with an inward-extension protruding ring which faces and extends into the ceramic container body. The inward-extension protruding ring is provided with a flexible annular leather cup, and the flexible annular leather cup forms a structure of expanding and sealing an inner wall of the ceramic container body by overturning an upwarp edge of the flexible annular leather cup when the container coveris covered into the ceramic container body. The container cover is further provided with a cover-connecting anti-scalding handle which is directly formed from the container cover and extends outwards, the anti-scalding handle is provided with an overturning type buckling handle, an angular buckling shoulder is arranged on the lower side of the anti-scalding handle, the overturning type buckling handle is provided with an angular sliding buckle capable of being connected and locked corresponding to the angular buckling shoulder, an annular buckling shoulder is formed on the outer side of an upper end wall of the ceramic container body, and the overturning type buckling handle is provided with a clamping-connection portion which is in supporting connection with a random annular position of the annular buckling shoulder arranged on the ceramic container body. The sealing anti-scalding type microwave fresh-keeping ceramic container has the advantages of being capable of effectively keep sealing, anti-scalding, easy to implement and convenient to use.

The invention discloses an automatic grinding fixture for a numerical-control machine tool, and relates to the technical field of auxiliary accessories for numerical-control machining. The automatic grinding fixture is provided with a mounting plate. A rotary cylinder is arranged on the mounting plate, a die clamping seat is arranged on the rotary cylinder, positioning dies are arranged on the die clamping seat, and workpiece embedding grooves are formed in the positioning dies; a reference positioning slide rail is arranged on the mounting plate, positioning sliders are arranged on the reference positioning slide rail, reference positioning blocks are arranged on the positioning sliders, reference positioning cylinders are arranged on the mounting plate, piston rods of the reference positioning cylinders are connected with the positioning sliders, detection yielding cylinders are arranged on the mounting plate, detection positioning cylinders are arranged on the detection yielding cylinders, displacement detection frames are arranged on piston rods of the detection positioning cylinders, and displacement detection devices are arranged on the displacement detection frames; pliers are arranged on the mounting plate and are positioned at the rear side of the die clamping seat, jaws of the pliers are positioned above the workpiece embedding grooves, a support frame is arranged on the mounting plate, pliers driving cylinders are arranged on the support frame, and piston rods of the pliers driving cylinders are hinged to handles of the pliers. The automatic grinding fixture has the advantages that the automatic grinding fixture is simple in structure, convenient to use and high in production efficiency, and the labor intensity can be relieved.