108results about How to "Convenient quality control" patented technology

The related control system for crystal equal-diameter growth comprises: a crystal growing furnace, a crystal diameter detection part, a control part for crucible temperature, a control part for crystal tension speed to real-time gather crystal tension speed signal and feedback to regulate the speed by algorithm of Fuzzy control and PID control, and a common controller to receive all former signal. this invention improves control precision greatly as well as the one-draw yield.

The invention discloses an air-boosting hydraulically driven clutch execution mechanism. The air-boosting hydraulically driven clutch execution mechanism comprises a clutch automatic operating system, and is characterized in that the clutch automatic operating system comprises a hydraulic oil source (1), a proportional flow valve (2), a hydraulic operating cylinder (3), a clutch (4), a clutch slave cylinder (5), an air storage tank (6), an air valve block (10), a slave cylinder working chamber (11), an operating cylinder piston (12), a slave cylinder post rod (13), a release fork (14), a slave cylinder right chamber M, a slave cylinder air valve N and an electronic control unit (ECU).

The invention discloses a sliding formwork control method used in motion control of a virtual axis machine tool cutter, comprising the following steps: planning the space motion trail of the cutter in the processing procedure of a virtual axis machine tool; determining the expected motion trail of each active pair of the virtual axis machine tool in the processing procedure; then establishing the mathematical models of the controlled objects of each control branch circuit of the virtual axis machine tool; detecting and determining the actual motion state of each active pair of the virtual axis machine tool; calculating the function of the switching surface according to the sliding formwork control theory; determining the motor drive controlled variable of each control branch circuit of the virtual axis machine tool and sending to each motor driver; and finally driving each active pair by the motor drive controlled variable of each control branch circuit so as to drive the virtual axis machine tool cutter to realize the expected motion. In the invention, the precise models of the controlled objects of each branch circuit are not needed to be established, and the high-precision control towards the motion of the cutter can be realized by utilizing the excellent characteristics of the sliding formwork control technology; and the controlled variable of the sliding formwork is constituted by continuous functions with no trembling problems.

The invention discloses a process for processing a two-sided and multilayer circuit board. The process includes the steps that the link that an organic electrical membrane is plated is utilized to replace pretreatment and electroless plating copper links in the process of processing a traditional circuit board, and the process of plating the organic electrical membrane is utilized to produce the circuit board. Compared with a traditional process, plate rotating links are reduced, consumption of copper, tin and other metal is saved, the production process is effectively simplified, and production cost is reduced. In addition, in the production process, formaldehyde, strong nitric acid and other hazardous substances are not used, therefore, environment friendliness is achieved, and damage to the body of operators is reduced in the process of processing the two-sided and multilayer circuit board.

The invention discloses a maximum power point tracking controller for a three-phase photovoltaic power generation system. The controller mainly comprises a BOOST type DC / DC converting circuit, a three-phase inversion circuit, a control circuit and a power circuit. The technical scheme includes that a variable-structure fuzzy control method is applied to MPPT (maximum power point tracking) of photovoltaic power generation so that tracking precision can be improved, and the method can effectively realize maximum power point tracking when illumination and temperature vary. By means of variable-structure fuzzy control, different fuzzy sub-controllers are designed according to different working conditions, the discourse domain range, control rules, parameters and the like of the fuzzy sub-controllers are different, the fuzzy sub-controllers form a variable-structure fuzzy controller, and accordingly one fuzzy sub-controller constantly enables the system to achieve the optimal control quality in system running.

The invention belongs to the technical fields of application methodology and electronic tongue detection, and discloses a difference degree calculation method and tea quality identification method based on the electronic tongue detection. The difference degree calculation method comprises the steps of electronic tongue detection, PCA analysis, and difference degree calculation; wherein the difference degree calculation adopts a recently improved calculation mode, each coordinate in the PCA score matrix is taken into account during the calculation process in a form of distance between each coordinate and the center point so as to reduce the affect of the random errors during the experiment process, and an sample acceptable fluctuation range is formed at the same time. The tea quality identification is on the basis of the electronic tongue difference degree detection of tea samples, the same tea species is taken as the standard, the credibility interval is set according to the difference degree in each group, and thus established is a standard sample experiment measured value error range. If the measured value of a tea sample is in the credibility interval, the sample is qualified; and if the measured value of a tea sample is not in the credibility interval, the sample is disqualified. The method can be used to control tea quality, and is a more efficient and stable detection method for market, enterprises, and detection organizations.

The invention relates to an automatic detection method of the fault of a program guidance (PG) motor, which comprises the following steps of: (1) when an air conditioner is started, setting a single chip computer in an air-conditioning controller to always detect the feedback signal of the PG motor; (2) if the single chip computer does not receive the feedback signal of the PG motor within the set time t1, switching off a power supply of the PG motor; (3) after the set time t2, switching on the power supply of the PG motor by the single chip computer and starting detecting the feedback signalof the PG motor; and (4) if the single chip computer still does not receive the feedback signal of the PG motor within the set time t1, judging that a fault occurs in the PG motor and displaying the fault code of the fault of the PG motor on a display screen of the air conditioner. By adopting the method, the quality in the after-sale service and the production process of the air conditioner are very convenient to manage and control.

The invention relates to an extreme value searching control parameter self-adaptive adjusting method based on a slip form. The method includes the following steps: (1) collecting actual output power ps(t) of t moment (current moment) from the output end of a generator every sampling period delta t and obtaining current wind speed through a wind speed measuring device; (2) leading out optimum rotating speed under the current wind speed; (3) calculating an adjusting coefficient gama; (4) conducting parameter adjustment on extreme value searching control based on the slip form, if |ps(t)-pwmax(t)|>Xi and Xi is a threshold, Z0=Z0*gama, and U0=U0*gama; otherwise, keeping Z0 and U0 unchanged, t=t+delta t and turning to the step (2); (5) utilizing a control system to quickly adjust the rotating speed omega r of the generator to reach the optimum rotating speed omega r ef; (6) enabling an output power curve to approach the optimum power curve. By means of the method, parameters of the control system can be adjusted automatically according to the current wind speed environment, the output power curve can approach the optimum curve, and the wind energy utilization coefficient Cp can be recovered to the maximum value.

A laser processing apparatus and a laser processing method are provided. The laser processing apparatus includes: a robot (1) having a fixture for carrying a product and configured to carry and move the product; a laser (2) configured to fabricate a pattern on the product; a detector (3) configured to detect a current location of the fixture; and a controller connected with the robot (1), the laser (2) and the detector (3) respectively, and configured to store a standard location of the fixture, to compare the current location of the fixture with the standard location of the fixture to obtain a first comparison result, and to control the robot (1) to move according to the first comparison result so as to adjust the current location of the fixture. The apparatus and the method are simple to implement, greatly broaden the application range and prospect of the SBID (Super- energy Beam Induced Deposition) technology, which facility the product quality control and improve the production efficiency.

The invention provides a mold forming type continuous oil-pouring type fried egg frying machine and aims to solve the problems of batch frying of fried eggs, recycling of edible oil and the like. The mold forming type continuous oil-pouring type fried egg frying machine comprises a case, a frying mechanism for the batch frying of the fried eggs, a fried egg delivery device and an edible oil recycling system, wherein the frying mechanism for the batch frying of the fried eggs and the fried egg delivery device are arranged on the case, and the position of the fried egg delivery device corresponds to the output end of the frying mechanism. The frying mechanism comprises a conveying device and fried egg molds connected to the conveying device; the fried egg delivery device comprises a conveying motor and a conveying wheel which is connected to the conveying motor to connect and drive a conveying belt; and the edible oil recycling system comprises an oil temperature control system, an oil pump, an oil pipe, an oil pipe branch, oil nozzles and bottom oil complementers. The mold forming type continuous oil-pouring type fried egg frying machine provided by the invention is novel in structure, can be used for batch production, is high in frying efficiency and can control the quality of the fried eggs.

The invention provides a fiberglass-reinforced plastic septic tank cylinder / bracing ring integrated winding technique. A gum dipping trolley and a creel are utilized to wind a fiberglass-reinforced plastic fiber bundle onto a mold outer wall to form a fiberglass-reinforced plastic cylinder. The cylinder is wound after winding the bracing ring, so that the cylinder and bracing ring are connected into an integral body. The technique has the advantages of high winding strength, firm bracing ring / cylinder combination and higher product quality, saves the labor cost and raw materials, and enhances the production efficiency.

The invention provides a local diffusion-sawtooth anti-fake print. The print is provided with a diffusion area, an indiffusion area, a diffusion coating or an indiffusion coating. A fixed image-text ink layer edge rapidly diffuses so as to form an obvious random sawtooth under an effect of a diffusion area surface tension. A height of the sawtooth is greater than a height of a sawtooth on a two-dimensional code ink layer edge. A sawtooth density is greater than a sawtooth density of the two-dimensional code ink layer edge. The print is easy to carry out quality control, a defective index can be reduced, and a lot of a lot of printing wastes and economic losses can be avoided.

The invention discloses a communication machine room temperature model prediction control method and system. The communication machine room temperature model prediction control method includes the steps: according to the boundary conditions of the communication machine room, utilizing CFD to establish a communication machine room temperature field three dimensional model; utilizing the communication machine room temperature field three dimensional model to perform steady state and transient analog solution successively, and obtaining the unit step response data of the input and output temperature; according to the unit step response data of the input and output temperature, obtaining a mathematical model of the communication machine room temperature through system identification, and taking the mathematical model of the communication machine room temperature as the prediction model transfer function of the model prediction controller; and according to the error between the predicted output and the reference locus, obtaining a target function of the model prediction controller which uses rolling optimization to minimize the error between the predicted output and the reference locusof the target function, generating the controlled variable, and utilizing the controlled variable to perform communication machine room temperature control. The communication machine room temperaturemodel prediction control method can effectively establish a mathematical model of the communication machine room temperature, and has good control quality.

The invention relates to a method for simultaneous determination of caffeic acid and 8 flavonoids in propolis by using high performance liquid chromatography. Simultaneous quantitative determination of flavonoids and caffeic acid has not been reported so far. The method provided by the invention is characterized in that a high performance liquid chromatograph is used for determination, the method comprises the procedures consisting of preparation of standard stock solutions, preparation of standard intermediate solutions, preparation of standard working solutions, drafting of standard curves, treatment of samples and determination of the samples, and in the procedure of preparation of the standard stock solutions, a caffeic acid standard stock solution, a rutin standard stock solution, a quercetin standard stock solution, a myricetin standard stock solution, an apigenin standard stock solution, a kaempferol standard stock solution, a pinocembrin standard stock solution, a chrysin standard stock solution and a galangin standard stock solution can be obtained. According to the invention, high performance liquid chromatography is employed for simultaneous determination of caffeic acid and 8 flavonoids in propolis, and pre-treatment of samples is easy and convenient and is rapid to operate.

The invention discloses a brushless direct current motor control method, belonging to the technical field of control of a brushless direct current motor. The control method comprises the following steps of: optimizing the parameters of a proportional integral (PI) controller by using generalized predictive control guidance; introducing the parameters into a brushless direct current motor control system to replace a speed ring PI controller and obtain a new generalized predictive PI control method of the speed ring; and converting a controlled quantity obtained through calculation by the generalized predictive PI control method into a space vector pulse width modulation (SVPWM) signal, and inputting the SVPWM signal after amplification into an inversion driving circuit so as to change output voltage of an inverter and further control the rotational speed of an electric motor. By the brushless direct current motor control method, the tracking control on the rotational speed of a brushless direct current electric motor is achieved. The control method has the advantages of no overshot, short adjustment time, low steady-state error, fast response speed, high control quality and form simplicity, and is convenient to implement.

A notebook computer appearance detection device; including a frame, a positioning mechanism arranged on the frame, a turning mechanism, a displacement mechanism, a handling mechanism, a visual detection mechanism and a control mechanism; there are at least three sets of positioning mechanisms, and the turning mechanism includes clamping claws to fix blocks, grippers, gripper cylinders and overturning cylinders; the displacement mechanism includes the X-axis linear movement slide rail, the Y-axis linear movement slide rail and the Z-axis module set on the frame; the handling mechanism includes the handling cylinder, and the visual inspection mechanism includes Light source, surface vision detection mechanism and side vision detection mechanism. The detection device of the present invention is mainly used in the notebook computer manufacturing industry, and can quickly, efficiently and stably complete the purpose of replacing manual operations; for factories, it can better simplify manpower and reduce the labor costs of factories. The detection efficiency is better improved, and the product quality is more guaranteed and stable.

The invention discloses an Agrocybe aegerita preservative and a preparation method thereof and belongs to the technical field of fruit and vegetable preservation. The Agrocybe aegerita preservative comprises raw materials in parts by weight as follows: 5-10 parts of chitosan, 5-10 parts of sodium alginate, 1-5 parts of tea polyphenol, 3-8 parts of inulin, 5-10 parts of pullulan and 100-120 parts of sterile water. The invention further provides the preparation method of the Agrocybe aegerita preservative. According to the preparation method, the raw materials are mixed, subjected to ultrasonic dispersion and subpackaged. The precooled Agrocybe aegerita is directly soaked in the diluted preservative and can be packaged and stored after being dried in the air naturally; the preservation cost is low, the preservation time is long, the preservation and storage period of the Agrocybe aegerita can be prolonged to 30 days, the quality is controlled well, the freshness and nutrition facts of the Agrocybe aegerita are guaranteed sufficiently, toxic and side effects on a human body are avoided, safety and environmental protection are realized, and diverse requirements for the Agrocybe aegerita are met.

The invention discloses an alignment verification method for an exposure machine. The method comprises the following steps of: (1) design of a lower film: forming a plurality of alignment circles which are externally separated from one another and have the same radius, wherein the centers of the alignment circles are arranged linearly at equal intervals; (2) design of an upper film: correspondingly forming a plurality of verification circles on the upper film by using a concentric circle method, wherein the radiuses of the verification circles sequentially increase; and (3) measurement: respectively arranging the upper film and the lower film on an upper table surface and a lower table surface of the exposure machine, when the upper film and the lower film are aligned, observing the coincidence degree of each verification circle and each alignment circle from small to large by taking a verification reference circle as a starting point, if each verification circle and the corresponding alignment circle are concentric, determining that an accuracy requirement is met, otherwise, observing all verification circles one by one by taking the verification reference circle as the starting point, wherein the difference of the radiuses of the verification circle and the alignment circle, which are internally tangent, is the alignment offset of the upper film and the lower film and the alignment offset of the exposure machine, so that the alignment accuracy of the exposure machine can be quantitatively measured.

The invention relates to preparation methods of fruit wine, particularly relates to a preparation method of icy lycium barbarum wine and belongs to the technical field of food beverages. The preparation method comprises the steps: harvesting lycium barbarum of last crop at the temperature of -15 DEG C to -7 DEG C, then, carrying out soaking and flushing on the fruits by water with the temperature of 1 DEG C to 8 DEG C, drying up residual moisture on surfaces of the fruits by cold air with the temperature of 1 DEG C to 4 DEG C, and then, carrying out crushing at the temperature of -15 DEG C to -7 DEG C; then, subjecting fruit pulp to microwave thawing at the temperature of -7 DEG C to 8 DEG C; carrying out enzymolysis, flash evaporation and fragrance recovery; subjecting fruit juice to low-temperature fermentation, and carrying out aging, freezing treatment, sterilizing, encapsulation and the like. According to the preparation method provided by the invention, the concentration of the fruit juice cannot be lowered while impurities such as dust are removed from surfaces of lycium barbarum and pesticide residue is lowered. The crushed lycium barbarum fruit pulp is subjected to microwave thawing at a squeezing temperature required for ice wine brewing, and thus, uniform and unfrozen fruit pulp in line with temperature requirements is obtained; compared with the traditional ice wine processes, the preparation method has the advantages that the control and improvement of product quality are better facilitated, and a foundation is provided for subsequent processing.

The invention belongs to the technical field of edible mushroom antistaling agent, and in particular relates to a compound antistaling agent for white mushroom and application thereof. The antistaling agent is compounded from the following raw materials in parts by weight: 1-2 parts of proline, 1-2 parts of histidine, 3-8 parts of Vc, 2-8 parts of EDTA and 1000 parts of water. The compound antistaling agent provided by the invention has long refreshing time and good quality, no toxic effect to human body and is safe and environmentally friendly; and the application method is simple to operate and is low in cost.

The invention discloses a model-free adaptive PID control method for a hydroelectric generating set adjusting system. The model-free adaptive PID control method is used for effectively regulating andcontrolling a hydroelectric generating set and comprises the following steps of: performing dynamic linear conversion on a nonlinear hydraulic turbine set adjusting system by using a compact format dynamic linearization (CFDL) method; setting initial values of an input quantity and an output quantity of a control system according to historical operation data of the set; introducing a concept of apseudo partial derivative, and setting an initial value; setting a control performance index function and a pseudo partial derivative estimation criterion function; and acquiring current actual outputand expected output, and calculating a system control law in combination with the pseudo partial derivative. Besides, PID control and a model-free adaptive controller (MFAC) based on the CFDL are partially connected in parallel to obtain a new control method, rotating speed oscillation in the starting process of the set can be effectively reduced, better adjusting quality is achieved, and the actual production requirement of a hydropower station is better met.

The invention relates to the technical field of noise reduction, in particular to an active noise control system for an air conditioner fan, the active noise control system comprises a signal conversion unit for converting an acoustic signal of noise at the air conditioner fan into an electric signal; a controller used for receiving the electric signal of the signal conversion unit to generate a control signal of interference noise; according to the active noise control algorithm based on FxLMS, the controller provides a physical platform for the active noise control algorithm based on the FxLMS . The active noise control algorithm based on the FxLMS adjusts the control coefficient of the controller, the output of the controller reaches a monitoring point after passing through a specific physical channel, the objective function reaches the minimum control method, and a secondary actuator generates secondary sound output after receiving a control signal of the controller. An error sensor is used for picking up the interference sound field signal generated by the secondary actuator and feeding back the interference sound field signal to the controller, the system is reasonable in design, simple in structure and stable in operation, and the noise of the air conditioner fan can be effectively reduced.

The invention discloses a mushroom fresh-keeping agent and a preparation method of the mushroom fresh-keeping agent and belongs to the technical field of fruit and vegetable fresh preservation. The mushroom fresh-keeping agent comprises the following raw materials in parts by weight: 5-10 parts of chitosan, 5-10 parts of vitamin C, 1-5 parts of tea polyphenol, 5-10 parts of pulullan and 100-120 parts of sterile water. The invention further provides the preparation method of the mushroom fresh-keeping agent. The method comprises the steps of mixing the raw materials, and performing ultrasonic dispersion and subpackage. The fresh-keeping agent is directly sprayed onto the surface of picked mushroom after diluted, is convenient to use, can be used for the fresh preservation of a small portion of bagged mushroom and massive warehoused mushroom, has low fresh preservation cost and long fresh preservation time, can prolong fresh storage life of the mushroom to 30 days, achieves good quality control, adequately assures freshness and nutritional ingredients of the mushroom, has no toxic or side effects on a human body, is safe and environment-friendly and meets diversified demands of people on the mushroom.

The present invention discloses a pleurotus ostreatus preservative and a preparation method thereof, and belongs to the technical field of fruit and vegetable preservation. The pleurotus ostreatus preservative comprises the following raw materials in parts by weight: 5-10 parts of inulin, 5-10 parts of citric acid, 1-5 parts of tea polyphenol, 3-8 parts of calcium lactate, 1-5 parts of carrageenan, 5-10 parts of pullulan and 100-120 parts of sterile water. The present invention also provides the pleurotus ostreatus preservative preparation method and the pleurotus ostreatus preservative is prepared by mixing the raw materials, conducting ultrasonic dispersion of the mixed raw materials, and sub-packing the ultrasonically dispersed raw materials. The preservative is diluted and the diluted preservative is directly sprayed onto the surface of the collected pleurotus ostreatus. The pleurotus ostreatus preservative can be used for the preservation of small-bagged pleurotus ostreatus and also be used for the preservation of the pleurotus ostreatus stored in large quantities. The pleurotus ostreatus preservative is low in cost and long in preservation time, can extend the preservation and storage period of the pleurotus ostreatus to 30 days, is good in quality control, fully guarantees the freshness and nutrients of the pleurotus ostreatus, is free of any toxic or side effects to human body, is safe and environmentally friendly, and meets the needs of different groups for the pleurotus ostreatus.

The invention provides a novel tobacco sheet and a production method thereof. Tobacco stalk and bottom tobacco which are homologous with the tobacco are used as materials, wood pulp or bamboo fiber pulp prepared by a chemical method is not used, miscellaneous gas does not exist, the compatibility is good, and compared with the existing tobacco sheet, the sensor effect, the bulk density, the filling rate, the flammability and the like are all improved; not only is the tobacco sheet quality improved, but also the plasticity is strong, manual regulation can be conducted on physical and chemical indicators according to practical demand, cigarette formulating regulation is high in free degree, and cigarette quality is improved conveniently; the problems that the tobacco sheet production raw materials are in urgent shortage and the tobacco stalk and the bottom tobacco are abandoned are solved, the cost of the tobacco sheet is significantly reduced, and the production method has high economic benefits and a profound social meaning.

The invention relates to a lamp bar type LED transparent display screen, and provides a lateral mounting type full-color LED package and an LED transparent screen. Lateral mounting type LED packaged LED lamp beads are designed to be of a structure of a surface mount device (SMD), and each lateral mounting type LED packaged LED lamp bead comprises an electrode metal sheet, a main body frame, LED chips, multiple leads and package colloid. According to the full-color LED display device, the size is small, a lamp bar PCB of the LED transparent display screen is parallel to the sight line of the human eyes due to the fact that a lateral mounting mode is adopted, the penetration rate of a screen body of the LED transparent display screen is not limited by the size of the PCB and reaches a higher value, the point spacing distance specification can be smaller, and the reliability is higher; when display modules are assembled, high-speed automated mounting of an SMT can be achieved, the production efficiency is high, and quality control is easy to achieve.

The invention discloses a manufacturing method for rare earth alloy battery zinc powder, which comprises the following steps: (1) using a die-casting device which is provided with small holes on the wall to press rare earth metals such as lanthanum, yttrium and cerium into zinc solution to directly produce zinc-rare earth preliminary alloy; and (2) melting the prepared zinc-rare earth preliminaryalloy in the zinc solution and manufacturing the prepared zinc-rare earth preliminary alloy into zinc-rare earth alloy zinc solution with needed rare earth metal concentration. Compared with the prior art, an alloy manufacturing method which directly presses the rare earth metal into the zinc solution is adopted in the first manufacturing step and the rare earth metal is completely soaked in thezinc solution, thus preventing rare earth metal from contacting air and being oxidized to a large degree.

The invention discloses a safe and environment-friendly cold-chain logistics preservation method of meat products. The cold-chain logistics preservation method comprises the following steps: (1) cooling meat after slaughtering in an environment with a temperature of 0-4 DEG C and relative humidity of 80-95% for 12-36 hours, and then performing boning, cutting and packaging; and (2) transporting the packaged meat in an environment with a temperature of 0-4 DEG C and relative humidity of 80-95%, wherein the temperature difference is 0.5-1 DEG C or lower in the transportation process. The safe and environment-friendly cold-chain logistics preservation method of the meat products can effectively inhibit and kill dominant microbes resulting in rotting of the chilled meat, control fat oxidation,reduce the storage cost in circulation of the meat and prolong the shelf life of the chilled meat. The safe and environment-friendly cold-chain logistics preservation method of the meat products hasa long preservation time, good quality control and good preservation effect, does not have any side effects on the human body and also has certain effects of nutrition fortification and health care.

The invention discloses a biological preservation liquid of animal foodstuff and a preparation method of the biological preservation liquid, and belongs to the technical field of biological preservation of foodstuff. The biological preservation liquid is prepared from the following components by weight: 0.4-0.6g of epsilon-polylysine, 0.3g of tea polyphenol, and 1000g of sterile water. The invention also discloses the preparation method of the biological preservation liquid. The preparation method comprises the following steps: pouring components of the composition into an agitator to agitate for 10-20 minutes after mixing, so as to form the finished product. The biological preservation liquid disclosed by the invention is long in preservation time, good in quality control, simple in formula, convenient to operate, low in cost and high in safety performance, and has a nutritious function on a human body; the nutrition and the flavor of the animal foodstuff can be effectively kept.