91results about How to "good consistency" patented technology

The invention discloses a high performance time digital converter circuit frame, it includes time-delay chain loop which generates low bit data, counter which generates high bit data and a compensating control source; said time-delay chain loop counts the low bit and transfers to said counter in definite period, said counter accumulates the signal with definite period to be the high bit of the time digital converter; Said compensating control source compensates and controls the voltage signal of said time-delay chain loop; The precision is high; the minimum time distinguishing ratio is the one class buffer transmission delay; the speed of processing is quick, when the counting ends, data is obtained, without additional processing time; the output of flip-latch is connected with high bit counter, it guarantees the correctness of circulation and carry; the compensating control source is introduced to guarantee the consistency of system under the same temperature, voltage, craft; the requirement for every module is not high, so it is easy to realize.

The invention provides a pulsed X-ray generation method and a pulsed X-ray generation device. A feedback signal processing unit of a high-voltage pulse generation system of the pulsed X-ray generation device receives a tube voltage feedback value signal and forms a close loop control circuit with a voltage setting value signal; a feedback signal processing unit of a tube current control system receives a tube current feedback value signal and forms a close loop control circuit with a current setting value signal; a signal generation unit of a control system generates a tube voltage analog value and setting value signal and inputs the signal to the high-voltage pulse generation system, and generates a tube current analog value and setting value signal and inputs the signal to the tube current control system; a feedback signal processing unit of the control system receives the tube voltage and tube current feedback value signals; and a time schedule control unit of the control system controls each unit according to a preset time schedule. The invention has the following advantages: the pulse frequency and the duty ratio are adjustable; each pulsed X-ray has good repeatability and uniformity; and the rising edge and the falling edge of a single pulse are steep.

The invention provides a prefabricated overhead heat insulation pipe. In order to solve the problems that when an overhead pipe delivers hot air at a long distance, heat loss is high, and the construction cycle is long, according to the scheme, the prefabricated overhead heat insulation pipe comprises a working pipe. The prefabricated overhead heat insulation pipe is characterized in that the working pipe is wrapped in an inorganic heat insulation layer, an organic heat insulation layer and an outer protection pipe in sequence, and a protection layer is arranged between the inorganic heat insulation layer and the working pipe; longitudinal joints and transverse joints of the inorganic heat insulation layer, the organic heat insulation layer and the outer protection pipe are all in lap joint in a step shape in a staggered mode; the protection layer is connected in a pressed mode; the lap joint of the inorganic heat insulation layer and the organic heat insulation layer is provided with gaps. According to the measures, compared with a traditional prefabricated overhead heat insulation pipe, the prefabricated overhead heat insulation pipe is lower in heat loss, shorter in construction cycle and more environmentally friendly.

Commercially acceptable spandex can be prepared with greater efficiency, improved consistency and at lower costs from a high-solids content polyurethaneurea polymer solution. The polyurethaneurea is prepared using a combination of 4,4′-MDI and 2,4′-MDI, and an amount of chain extenders and chain terminators such that the polymer solution, prior to spinning, is highly soluble and has an appropriate pre-spun IV and primary amine content.

The invention relates to a lithium iron phosphate anode slurry stirring technology which comprises the following steps: (1) adding conductive slurry and NMP according to a weight ratio being (6-9) to (1-4) in a stirring tank, wherein the conductive slurry is one or two of graphene slurry and carbon nanotube slurry; (2) adding PVDF in the stirring tank, and stirring for 20-60min; (3) adding lithium iron phosphate and conductive carbon black, dry blending for 80-180min; (4) adding NMP, stirring for 60-150min; (5) carrying out reverse stirring for defoaming; (6) detecting and regulating parameters of slurry, and preparing the slurry, wherein a solvent of the conductive slurry is the NMP, the concentration is 4-10 percent, and the weight of the NMP added in the step (1) is 2-5 percent of that of the lithium iron phosphate. The lithium iron phosphate anode slurry prepared by the stirring technology provided by the invention is good in dispersibility and excellent in consistency.

The invention relates to a motorboat coating production line. The motorboat coating production line comprises a conveying trolley used for bearing a motorboat, a ground conveying device used for fixing and bearing the conveying trolley, a manual operating area and an automatic operating area. The conveying trolley comprises a frame, idler wheels and a connecting piece. The ground conveying device comprises a fixing piece, a conveying chain and a conveying chain control module. The automatic operating area comprises a moisture drying chamber, a cooling chamber, an electrostatic dust collection chamber, a dust-free paint spray chamber which is provided with a spraying mechanism, a paint make-up chamber, a levelling chamber, a temperature rising chamber, an oil paint solidifying chamber, a strong cold chamber and a temperature control device. The manual operating area comprises a dust-free polishing chamber, a multifunctional processing chamber, an airing and polishing chamber, a paint mixing chamber and a paint make-up chamber. The motorboat coating production line has the advantages of being high in production efficiency, good in product quality consistency, low in maintenance cost, and easy and convenient to operate.

A method for dividing tomograph in scanned image of CT film includes confirming resolution of reference tomography, selecting tomograph to be divided, using scale end point of reference tomography as reference point, locking relative position relation of rectangular frame to scale reference point, conforming resolution of the other tomography and carrying out convergent-divergent on the other tomograph as per set ratio, using scale end point of the other tomography as reference to confirm rectangular frame position in the other tomograph and using region surrounded by said frame as tomograph to be divided.

The invention discloses a miniature compression molding inductance element and a manufacturing method thereof. The manufacturing method of the miniature compression molding inductance element comprises the steps that a magnetic core and a coil are prefabricated; the prefabricated magnetic core and coil are combined into a combined body; powder and the combined body are compressed and molded to form a compression body, and a wire slot is formed in one side of the compression body; a metal electrode is formed on the wire slot; pin arrangement is carried out, in other words, the leading-out pin of the coil is arranged in the wire slot; an end electrode is formed, in other words, the leading-out pin of the coil and the metal electrode are welded together to form the end electrode of the miniature compression molding inductance element. By means of the manufacturing method of the miniature compression molding inductance element, the manufactured inductance element has the better consistency and is not likely to be damaged in the machining process, and the product reliability is higher. In addition, by means of the coil prefabrication technology, product machining is more flexible, the problem that a magnetic core is cracked in the prior art is avoided, and therefore the manufacturing method is more applicable to achieving volume production of thin and miniature power inductance elements.

The invention discloses a manufacturing method of electrode foil for a surface-mounting aluminum electrolytic capacitor. The method comprises the following steps: soaking aluminum foil in a phosphoricacid solution, and applying transient large current, placing in the mixed aqueous solution to perform repeated power-up corrosion, placing the aluminum foil in the mixed solution containing sulfamicacid and citric acid, soaking in the pure water at 40 DEG C, placing the aluminum foil in an oven, performing thermal treatment at 500 DEG C, applying the required voltage in the formation liquid containing 4%-15% at 70-90 DEG C, and performing formation treatment, and finally drying. The manufacturing method disclosed by the invention has the advantages that the obtained electrode foil residual core is good in consistency, and has the advantages of being high in intensity and low in impedance; and meanwhile, the electrode foil impurity ion content can be effectively controlled to be lower than 1ppm, the electrode foil leakage current is greatly reduced, and the service life is improved. And a use requirement of the surface-mounting aluminum electrolytic capacitor is satisfied.

The invention discloses a no-reference image quality evaluating method on the basis of contourlet transform domain image energy features. The no-reference image quality evaluating method comprises the following steps of: (1) selecting ideal images, and then calculating all-level average energy after contourlet transform; (2) utilizing near linear relation among all-level energy features, and establishing a prediction model; (3) utilizing the prediction model and high-level average energy to predict low-level average energy; (4) carrying out preliminary measurement on the image quality according to the predicted average energy and the average energy calculated by distorted images; (5) carrying out energy compensation on the JPEG distorted type; and (6) constructing the no-reference image quality evaluating level according to the preliminary measurement of the image quality and the JPEG distortion. The no-reference image quality evaluating method does not need subjective score for training, is simple, can be applicable to multiple alteration types, is consistent to the subjective evaluation height and can be used for detecting the validity of an image-video processing method.

The invention discloses an in-parallel sampling over-current protection circuit. The in-parallel sampling over-current protection circuit comprises a temperature-drift suppression circuit, an in-parallel sampling circuit, an output power component, a reference input end, a first output end and a second output end, wherein the temperature-drift suppression circuit consists of a first resistor, a first thermistor, a second resistor, a second thermistor and an operation amplifier; the in-parallel sampling circuit consists of a first switching tube, another second thermistor and a second resistor; the output power component is formed by N second switching tubes in a parallel connection manner; output current flows through the first output end and the second output end; when the output current is overlarge, voltage of a second input end of the operation amplifier is higher than voltage of a first input end, the signal level of the output end of the operation amplifier is changed, the first switching tube and the second switching tubes are disconnected to realize over-current protection; and the temperature-drift suppression circuit carries out compensation by the first thermistor and the second thermistor, and by voltage distribution between the first resistor and the first thermistor and voltage distribution between the second resistor and the second thermistor, a proportional relation is formed, and flexible adjustment of over-current protection points is realized.

The invention discloses a thermo-sensitive material for a temperature sensitive unit in the field of the sensor technology, in particular discloses a thermo-sensitive material with low resistivity and high B value negative temperature coefficient. The invention is characterized in that Mn-Ti-Cu oxide and Zn-Ca-Nb additive are made by a ceramic technique into the thermo-sensitive material with a spinel structure; the density of the material is 4.9-5.1g/cm <3>. The resistivity of the material stands at 20-100omega*cm under the temperature of 25 DEG C, and the B value is 2,600-3,300K under the temperature of 25 to 50DEG C. The invention has the advantages of low resistivity and high B value, and being an important material required for a power thermistor. The cost of the material is merely one third or a quarter of the cost of the commonly used material. Moreover, the invention has good consistency, repetition and stability, and is in particular applied to a surge current absorption NTCR component.

The invention relates to the technical field of computer aided design and manufacturing, in particular to a method for generating a glass polishing machining path of a five-axis numerical control machine. The method comprises the following steps of: A, constructing a geometric curved surface representing the shape of a product; B, designing a polishing shape curve on a plane and defining the section shape of a polishing grinding wheel; C, defining a cone tool according to the section shape of the polishing grinding wheel; D, generating a five-axis path of machining of a tool nose of the cone tool; E, simulating and previewing a machining effect and regulating the five-axis machining path to ensure the five-axis machining path to meet the design requirements of the product; F, mapping the machining path of the cone tool on the plane to the curved surface constructed in the step A; and G, converting the machining path of the tool nose of the cone tool into a polishing machining path of the grinding wheel. According to the invention, glass polishing is carried out by using the five-axis numerical control machine, patterns of the product have good consistency, and complex patterns canbe machined. Meanwhile, the production efficiency is improved, the production cost is reduced and the development period of a novel pattern is shortened.

The invention relates to a method for manufacturing a die of a compressor impeller of a turbocharger, which mainly comprises the following steps: firstly, a data model of the compressor impeller is designed: a computer three-dimensional data model of the compressor impeller of the turbocharger is designed through pro/engineer computer software; secondly, an impeller physical model is made by a digital control processing center: on a five-shaft digital control milling machine, an integrated impeller physical model is processed by metal materials, such as aluminum ally, and the like that are soluble in acid easily; thirdly, a metal layer is cast on the outer surface of the impeller physical model: an even nickel or copper layer with 2-7mm is cast on the outer surface of the impeller physical model by adopting an electroforming method; fourthly, the acid dissolution is carried out: the metal impeller physical model is molten by acid solution. The die of the compressor impeller of the turbocharger made through adopting the steps can be used for casting the compressor impeller of the rubber turbocharger.

The invention relates to an accurate and simple transformer oil acid value detection method. The method comprises the steps of: (1) oil sample detection, (2) blank solvent detection, and (3) calculation. In the step (1), 3.0-4.0g of transformer oil requiring detection is accurately weighed; an extractant isopropyl alcohol is added to the sample; the mixture is well mixed by shaking; an alkali blue 6B indicating agent is dropped into the mixture, such that a mixed solution is obtained; 0.05mol/L of a KOH ethanol solution is used for titration, until the color of the solution turns to light red. In the step (2), the extractant with a volume same as that used in the step (1) is weighed; the alkali blue 6B indicating agent is dropped into the extractant, such that a mixed solution is obtained; 0.05mol/L of a KOH ethanol solution is used for titration, until the color of the solution turns to light red, such that the titration reaches an end. In the step (3), the calculation is carried out according to the formula of: c(mgKOH/g)=(V-V0)*c(KOH)*M(KOH)/m. The method provided by the invention is simple and fast. With the method, heating and refluxing are not needed, such that working efficiency is improved. Twice titration is changed into once titration, such that the operation processes are simplified, and operation errors of the system are reduced.

The invention discloses a preparation method of a multilayer ceramic capacitor. A sintered block and a laminated body are mixed together and placed on a sintered plate, and then the laminated body issintered, so that the sintered component in the sintered block volatilizes to form a local atmosphere with high volatilization concentration around the laminated body, thereby preventing the excessivevolatilization of the sintered component in the laminated body, and making the sintered ceramic body uniform, compact and uniform. Each surface of the sintered block is inwardly concave. When the sintered block and the laminated body are mixed together, the sintered block and the laminated body cannot form large area contact, so the sintered ceramic body is not easy to adhere to the sintered block. The adhesive removing of the laminate body having smaller volume can be achieved completely, and the density and dielectric properties of the ceramic body are better.

The invention relates to a mobile network equipment firmware upgrading system and method. The system comprises a mobile network equipment upgrading subsystem used for receiving a version issued by a centralized management and control subsystem and upgrading firmware of the mobile network equipment, and the centralized management and control system used for detecting whether the mobile network equipment upgrading subsystem needs an upgrading version and issuing the upgrading version to the mobile network equipment upgrading subsystem. Compared with the prior art, the system and the method have the advantages of being good in uniformity, high in safety, wide in application range and the like.

The invention relates to a special large cutter grinder for a bearing cutter. The special large cutter grinder is characterized in that a machine tool is provided with a cutter frame installation base moving mechanism and a grinding mechanism, the cutter frame installation base moving mechanism is matched with the grinding mechanism, the cutter frame installation base moving mechanism comprises a transverse moving mechanism and a longitudinal moving mechanism, the longitudinal moving mechanism mainly comprises a large adjustment wheel, a transmission screw rod and a longitudinal moving plate, the transverse moving mechanism mainly comprises a transverse motor, a transverse feeding shaft and a transverse work table, the grinding mechanism mainly comprises a motor, a sand wheel, a motor installation plate, a linear guide rail and a stand column, the transverse work table is provided with a cutter frame installation base, a cutter frame is fixed to the cutter frame installation base, and the cutter frame installation base is fixedly connected with the transverse work table through a supporting base. Compared with a manual cutter grinding machine of the same kind, the special large cutter grinder is high in machining efficiency, the consistency of ground cutter heads is good, the grinder is convenient to adjust and high in precision and smoothness of machined products is high.

The invention discloses a wind energy prediction method which combines spatial-temporal features and error processing. The method comprises the following steps: extracting time features from a wind energy time sequence; extracting the information between the wind motors close to each other via a multi-input and single-output mode and introducing spatial features; preprocessing the spatial-temporalfeatures by a k-nearest neighbor based noise data detection method; analyzing the variance attributes of the preprocessed spatial-temporal features, and training multiple predictor models based on the result of the analysis; integrating the multiple predictor models by a weighted average method to generate an integrated learning model based on the spatial-temporal feature variance, which is usedto forecast the error of the integrated predictor model; using the integrated learning model to get a predicted value y, inputting the error features corresponding to the spatial-temporal features into an auxiliary model to get the result y ', then getting the final predicted value y + y'; and combining the integrated learning model with the auxiliary model to generate the final model.

The invention relates to a packaging method of an SMD type LED with a lens. Slice arrangement is directly carried out an electroplated SMD type LED patch support; adhesive dispersing is carried out on a die bonder to fix a chip; a fixed chip support box is placed in an oven and a crystal bonding adhesive is baked, so that the fixed chip support box is solidified; and then the solidified chip support box is placed in a welding wire machine and a gold wire or an alloy wire are employed to enable a P/N junction of the chip to be bonded with the support; and the bonded support is directly discharged into a moulding die with a lens and a press machine is utilized to inject a silicon resin or a silica gel into the moulding die, so that one-time injection moulding of an SMD type LED with a lens is completed. According to the packaging method of the SMD type LED with a lens in the invention, an injection method is utilized to produce the SMD type LED with a lens; and the output is high and the consistency is high; besides, the LED has high surface smooth finish and is free of air bubbles; a bonding force between materials is good; and injection and moulding can be completed once.

The invention discloses a neodymium iron boron magnet double-layer zinc electroplating method. A neodymium iron boron magnet is subjected to pretreatment, a water solution in which the concentration of zinc sulfate is 400-500 g/L, the concentration of boric acid is 15-25 g/L and the concentration of polyether is 5-30 ml/L is used for electroplating a clad layer with the thickness being 1-4 micronsfor the neodymium iron boron magnet at the temperature of 15-35 DEG C, wherein the pH of the water solution is 4-6; then, a water solution in which the concentration of zinc chloride is 30-70 g/L, the concentration of sodium chloride is 100-300 and the concentration of boric acid is 15-40 is adopted for electroplating a clad layer with the thickness being 5-8 microns for the neodymium iron boronmagnet at the temperature of 15-35 DEG C, wherein the pH of the water solution is 4-6; and then, a galvanized piece of the neodymium iron boron magnet is subjected to aftertreatment, and accordingly aneodymium iron boron magnet double-layer zinc electroplated piece is obtained. The binding force consistency between a first galvanization layer and the neodymium iron boron magnet is good, the galvanization layer and neodymium iron boron magnet binding force consistency is good, and corrosion resisting performance is good.

The invention discloses a transfer print device used for machining rubber tube opening circumference identification. The transfer print device is characterized in that a rotating support is arranged in the middle of one side of a base, the middle of the bottom of a lever is supported by the rotating support, a rubber tube positioning shaft is arranged at one end of the lever, the other end of the lever and one side of the upper portion of a device outer cover on the other side of the base are connected together through a cylinder, a driving wheel, a transfer print wheel and an ink wheel are arranged in the device outer cover, synchronous wheels are arranged on the other side of the driving wheel, the other side of the transfer print wheel and the other side of the ink wheel respectively, the synchronous wheels on the driving wheel, the transfer print wheel and the ink wheel are connected together through a synchronous belt, and an ink box is arranged below the ink wheel. By means of the arrangement, the rubber tube opening circumference identification machining process is automatically completed, the labor intensity of workers is lowered, the project quality is improved, the production efficiency is improved, the semiautomatic operation is achieved, and the transfer print device is safe, reliable, stable in action and long in service life.

The invention relates to the field of gene sequencing devices, and provides a semiconductor sequencing chip and a gene sequencer. The semiconductor sequencing chip sequentially comprises a substrate, a flowing chamber and a chip cover from bottom to top. The substrate comprises a sensor array and a micropore array located above the sensor array. The sensor array is provided with a plurality of sensors, and the sensors correspond to micropores in the micropore array in a one-to-one mode. The chip cover is provided with a reagent inlet and a first reagent outlet, and the reagent inlet and the first reagent outlet are formed in the two ends of the flowing chamber respectively. The distance between the middle of the inner surface of the chip cover and the substrate is small, and the distances between the two sides of the inner surface of the chip cover and the substrate are large. The semiconductor sequencing chip further comprises a reference electrode, and the reference electrode is communicated with liquid in the flowing chamber and provides reference voltage for the sensors. According to the semiconductor sequencing chip and the gene sequencer, due to the special design of the inner surface of the chip cover, the coincidence of the flowing speeds of a reagent in all the portions of the flowing chamber is better, interference signals in obtained sequencing data are reduced, and sequencing accuracy is improved.

The invention discloses a method for producing one-piece compressed hard glass fish collecting lamp bulb shell. The method comprises the following steps of: (1) selecting the specific size of a standard bulb shell to design the scheme of forming dies in advance, wherein in die materials, graphite or high-strength heat-resisting alloy can be used as blanks; (2) designing the bulb shell dies; (3) designing the two dies which have the same size, and forming feed holes with the diameters of between 30 and 50 millimeters uniformly at the upper ends of the two dies, wherein the two dies can be opened or closed under the mechanical control; (4) blanking hard glass melts continuously from a blanking opening and melting in a hard glass electric kiln at the high temperature of 1,200 DEG C, and conveying the hard glass melts into the dies directly from the feed holes of the dies; (5) after the hard glass melts are conveyed into the dies from the feed holes of the dies, introducing compressed air from the feed holes of the dies, and blowing; and (6) opening the dies, and cooling slowly to form the fish collecting lamp bulb shell. The method has the advantages that: the lamp bulb shell is fixed in a shape, uniform in outer diameter and wall thickness, standard in length and high stability and consistency; a large number of glass materials are saved; and the cost is reduced.

The invention relates to a 3D printing processing technology of an LTCC substrate cavity filling mold. The technology comprises the steps that a three-dimensional graph of the LTCC substrate cavity filling mold is drawn; the three-dimensional graph of the LTCC substrate cavity filling mold is imported into a 3D printing machine; the three-dimensional graph of the LTCC substrate cavity filling mold is converted into a recognizable format through the 3D printing machine, and 3D printing of the LTCC substrate cavity filling mold is carried out till printing is finished. According to the 3D printing processing technology of the LTCC substrate cavity filling mold, the problems that a traditional preparation method of a cavity filling mold is low in yield, not high enough in size precision and poor in consistency and durability are solved, the formed LTCC substrate cavity filling mold which is good in consistency, smooth and tight in surface, uniform in internal structure and high in size precision can be manufactured, and the 3D printing processing technology is applicable to high-performance LTCC substrate with a cavity.

The invention discloses a drawer type rack component and refrigerator employing the same. The drawer type rack component comprises a main rack and an auxiliary rack, wherein the main rack comprises a shelf and support frames arranged on the two sides of the shelf; the support frames are provided with sliding chutes positioned below the shelf in the thickness direction of the shelf and baffle plates formed at the front ends of the sliding chutes; the two ends of the auxiliary rack extend into the sliding chutes, and can move in the sliding chutes; positioning columns which extend outwards are arranged at the rear parts of the two sides of the auxiliary rack respectively; the support frames are also provided with transition grooves positioned in front of the shelf and vertically communicated with the sliding chutes, positioning grooves positioned between the shelf and the transition grooves and support plates for vertically spacing the sliding chutes from the positioning grooves to support the auxiliary rack; when the auxiliary rack is forwards pulled out, the positioning columns pass through the transition grooves, and move into the positioning grooves, and the support plates are supported below the rear side of the auxiliary rack to position the auxiliary rack and the shelf on the same plane.

The invention relates to a preparation method and device of semi-solid slurry and belongs to the technical field of semi-solid formation. The preparation method comprises the steps that molten metal melt is poured into a crucible container and cooled in the crucible container to the temperature between the liquid phase line temperature and the solid phase line temperature; inert gas shielding or vacuum shielding is performed on the melt in the cooling process of the metal melt, the metal melt in the crucible is subjected to weak disturbance treatment under the outfield effect, the liquid surface of the melt in the crucible is kept to be static or the melt keeps a weak laminar motion in the horizontal direction during disturbance treatment, surface layer oxide or gas is prevented from beinginvolved in, the outfield effect is stopped when the melt is cooled to be within the semi-solid temperature interval, and the semi-solid slurry in the crucible is poured into a pressure forming apparatus. The invention further discloses the preparation device adopted in the method. The semi-solid slurry prepared by the method and the device has the advantages of being high in purity, good in quality and consistency, easy to industrially produce and control, and the like.

The invention discloses an irbesartan hydrochlorothiazide capsule. The capsule includes the components of irbesartan, hydrochlorothiazide, carrageenan, mannitol, crosslinked polyvinylpyrrolidone and talcum powder. The irbesartan hydrochlorothiazide capsule enables medicines to slowly release step by step, the phenomenon of sudden releasing cannot occur, blood concentration is stable, medicine effect can maintain more than 8 hours, adverse reaction caused by medicine sudden releasing is avoided, and pharmacy safety is added. The irbesartan hydrochlorothiazide capsule can be used for treating primary hypertension.

The invention discloses a control structure of a heating chamber of a steel ball reheating furnace. The control structure comprises a plurality of groups of lifting stop gauges which are arranged in the heating chamber at intervals, wherein each lifting stop gauge comprises a baffle plate arranged in the heating chamber, the baffle plate penetrates through a base plate of the heating chamber and is connected with a lifting driving component, and the lifting driving component is fixed blow the heating chamber; a material stirring device is arranged between two adjacent groups of the lifting stop gauges and comprises a material stirring block which is connected with a material stirring driving component arranged on a top plate of the heating chamber; the heating chamber is divided into a plurality of small heating chambers by the lifting stop gauges, the heating and holding times of steel balls in each small heating chamber can be controlled in one-to-one correspondence, and the consistency of heating the steel balls is good; and meanwhile, the material stirring device can be used for clearing residues in the heating chamber, so that the cleanliness of the heating chamber is ensured.

A single-chip full-bridge TMR magnetic field sensor comprises magneto-resistor elements and a bias current branch, and the magneto-resistor elements are in bridge connection to form a full-bridge structure; each magneto-resistor element comprises a free layer, a pinning layer and a bias current layer, the bias current layer is connected with the bias current branch, and the bias current branch inputs a bias current to the bias current layer; and directions of the currents in the bias current layers in the magneto-resistor elements located on adjacent bridge arms are opposite, and the directions of the currents in the bias current layers in the magneto-resistor elements located on the opposite bridge arms are the same. In the invention, the bias current layer is arranged in each magneto-resistor element; the bias current layer is used for changing a magnetization direction of the free layer in each magneto-resistor element, and sensitivity to an external magnetic field is achieved; anda magnetic field sensor can form the full-bridge structure on a single chip at a time, and difficulty and production cost of a single-chip full-bridge magnetic sensor manufacturing process are greatlyreduced.