70results about How to "Affect speed" patented technology

The present invention is a system, method and computer program for operating a land-or marine-based multi-spool gas turbine system for generating electrical power to supply a load, wherein the system comprises a multi-spool gas turbine engine, and the method comprises controlling the rotational speeds of the at least two generators independently of each other so as to directly control the rotational speeds of the shafts of the spools, the at last two generators being operable to generate electrical current to supply the load, and regulating the amount of heat generated the first heat generating equipment. A computer program to perform the method is also disclosed.

A host computer system which receives information, rasterizes it, compresses it and transmits it to a portable device which decompresses the image to display it on a screen. The image can be decompressed in whole or in parts to be viewed as the user scrolls through the image. An electronic touch screen keyboard is featured, which is used to input text characters in a text area on the screen of the device. Thereafter, text is transmitted to specific areas on a virtual browser in the host computer as a string of characters, or individually, with refreshed images of the virtual browser sent back to the device for each transmission. The host computer system is also capable of translating locations on the touch screen of the device into text characters or commands.

The invention discloses an internally-arranged angle sensor all-in-one ultrasonic motor servo control system and relates to servo control over ultrasonic motors. The internally-arranged angle sensor all-in-one ultrasonic motor servo control system comprises a command module, a compensation module, a digital processing module, a drive panel and an all-in-one actuating mechanism. The command module sends out commands to the compensation module, and the compensation module converts the commands into frequency control signals and transmits the frequency control signals to the digital processing module; the digital processing module processes the frequency control signals into square signals and transmits the square signals to the drive panel, the drive panel amplifies the square signals and then inputs the square signals to the all-in-one actuating mechanism, the all-in-one actuating mechanism is a hollow ultrasonic motor with an internally-arranged angle sensor, the angle sensor feeds back speed and position information, the speed and position information reaches the compensation module after passing through the drive panel and the digital processing module, through comparison, compensation and conversion, newly-generated frequency control signals are transmitted to the drive panel, and therefore closed-loop control is achieved. The internally-arranged angle sensor all-in-one ultrasonic motor servo control system has high reliability, high precision and good environmental suitability, and is especially suitable for being used as shaft end servo control systems of platforms with multi-degrees of freedom.

The invention discloses a method for melting copper at low temperature. A copper melting device is involved. The copper melting device comprises a circulating gas pipeline, a heat exchanger, an acid-resistant water pump, a high-pressure acid-resistant air pump, an air filter, a liquid level sensor and a copper melting tank, wherein a feeding port, an acid spray pipe and a filter plate are sequentially arranged from top to bottom in the copper melting tank. The method specifically comprises the following steps of: 1) preparing raw materials; 2) adding a copper material; 3) filtering air, feeding into the copper melting tank, rising, and reacting with the copper material to obtain copper oxide; 4) spraying a solution of dilute sulfuric acid by using the acid spray pipe and reacting with the copper oxide to obtain a solution of copper sulfate; and 5) discharging the solution of copper sulfate through the filter plate. The method for melting the copper at low temperature is easy to operate, and is high in copper melting efficiency, low in discharge loss and low in pollution, and steps are simple; and the copper melting device used by the method has a simple structure and industrialized production is easy to realize.

The invention relates to a quality visual detection system for plastic bottles. The quality visual detection system comprises a detection box and a server; a conveying guide rail, a separating mechanism and a detection mechanism are arranged in the detection box; the separating mechanism comprises two transmission parts, and the two transmission parts are used for separating the to-be-detected plastic bottles one by one to orderly enter a detection station; the detection mechanism comprises three cameras and a light source, and the three cameras are arranged on the two sides of the conveying guide rail in the shape of a regular triangle. The quality visual detection system provided by the invention has the benefits that as the separating mechanism is arranged, the next to-be-detected plastic bottle can be driven to move forwards; meanwhile, the distance between the next to-be-detected plastic bottle and the detected plastic bottle can be controlled, so that the influence on the accuracy of detection results is avoided, and the problem of slower detection speed is solved; the quality visual detection system provided by the invention can also realize the all-round image collection of the detected plastic bottles, so that the detection results are more reliable.

The invention provides a comparator and a successive approximation analog-to-digital converter. The comparator comprises a front operational amplifier circuit and a latch circuit which are connected in turn. The front operational amplifier circuit comprises first, second and third front operational amplifier units which are connected in turn and suitable for amplifying signals to be compared. Thethird front operational amplifier unit comprises first and second PMOS transistors. The latch circuit comprises a first CMOS phase inverter and a second CMOS phase inverter and is provided with a bistable structure formed by end-to-end connection of the inverters and is suitable for comparing the signals and outputting the corresponding digital signals according to the comparison result. The gateelectrodes of the first and second PMOS transistors are coupled with the output end of the second front operational amplifier unit. The gate electrode of the first NMOS transistor and the gate electrode of the second NMOS transistor are coupled with the output end of the second front operational amplifier unit and the input end of the third front operational amplifier unit. With application of thescheme, the speed of the comparator can be enhanced.

The invention comprises a method, a device and a fish-farm for controlling the concentration of living organisms in fluid in order to facilitate the handling of the organisms such as grading and counting. Said apparatus comprises a first in-feed channel for a flow of living organism in a fluid (1), a second in-feed channel for a flow of fluid (2), a chamber (4) containing a lever (11) for regulating the flow from the first and the second in-feed channel through the chamber, an outlet (15), and a computer, wherein a sensor (9) is positioned in the first in-feed channel for detecting the density of living organism in the flow, and wherein the computer continuously and automatically regulates the ratio of flow from the first and the second in-feed channel through the chamber and towards the outlet by the lever in response to the density of living organism in the flow determined by the sensor.

The invention relates to the field of accurate proportioning of mine powder, in particular to an mine powder accurate proportioning and mixing device and a use method. The mine powder accurate proportioning and mixing device comprises a proportioning mechanism, a gate mechanism, a material distributing barrel, a micro-proportioning gate mechanism, a scraping mechanism, a mixing barrel and three weighing barrels. According to the mine powder accurate proportioning and mixing device and the use method, The effect of adjusting the outflow volume of raw materials of different proportions is achieved through the material distribution gate plate, the effect of dividing one cylinder is further achieved, one gate mechanism can conveniently control outflow of the three raw materials to be closed atthe same time, the device can be suitable for various raw materials, and it is guaranteed that the raw materials of various proportions can flow out according to the needed raw material proportion atthe same time; a large amount of discharging time of the equipment is saved, a large amount of raw materials remaining in the three conical barrels are cleaned in time through the effect of the scraping mechanism, the proportioning precision of the raw materials is improved, the three conical barrels are synchronously cleaned, and the situation that the next proportioning speed is affected due tothe fact that the conical barrels are not synchronously cleaned up is avoided.

The invention relates to a method and a system for producing freshwater fish feed by taking canteen kitchen waste as a main raw material. The method comprises: (1) a sorting and crushing process; (2) a mixing and fermenting process; (3) a drying process; (4) a winnowing and grinding process; (5) a granulating and finished product packaging process. The method concretely comprises the steps of carrying out the sorting and crushing process, specifically, removing impurities such as wood and bamboo, plastics and metal of fresh waste with the water content of less than or equal to 80%, crushing the waste without impurities into clean kitchen waste with particle size of less than or equal to 30mm, and conveying the clean kitchen waste into the mixing and fermenting process by using a sealed conveying device; adding materials such as bean pulp and fish meal into the clean kitchen waste according to a pre-mixed fish feed formula, evenly mixing and stirring, then carrying out fermentation, and sending the fermented mixture into the drying process; drying the fermented mixture until the water content of the mixture is less than or equal to 13%, and then sending the obtained material into the winnowing and grinding process; further removing the impurities of the mixture and grinding into powdery material; finally, granulating and packaging to obtain the freshwater fish feed. The method and the system are especially suitable for small and medium-scale resourceful treatment of the kitchen waste.

The invention discloses a method for judging the hot extrusion formability of comparative metals. It selects an alloy from the alloys participating in the comparison and extrudes it under constant temperature and constant speed conditions within a specified time to obtain the alloy to achieve continuous extrusion. The minimum extrusion force of extrusion, and with this extrusion force as a starting point, is extruded under constant temperature conditions to obtain the common minimum extrusion force of all alloys participating in the comparison to achieve continuous extrusion within a specified time, and use this as a constant Extrusion force, and then on the simulation test extrusion device, carry out constant temperature and constant force extrusion on the samples of various alloys participating in the comparison, and obtain the extrusion stroke and extrusion time of various alloys under the state of constant temperature and constant force. Relationship curve, through comparison to obtain the metal hot extrusion forming properties of various alloys.

The invention discloses an LED (Light-emitting Diode) deep ultraviolet sterilization device for air purification. The LED deep ultraviolet sterilization device for air purification comprises an air purification tank, a first deep ultraviolet sterilization LED lamp and a heater. An air inlet is formed in the top part of one side of the air purification tank; an air outlet is formed in the bottom part of one side, opposite to the air inlet, of the air purification tank; a side guide rail is arranged in the air purification tank; a movable sliding seat is arranged on the side guide rail; and thefirst deep ultraviolet sterilization LED lamp is fixedly arranged on the movable sliding seat, and is slidably arranged with the slide guide rail through the movable sliding seat. The LED deep ultraviolet sterilization device for air purification provided by the invention is reasonable and simple in structure ang good in sterilization effect; the first deep ultraviolet sterilization LED lamp can move in the air purification tank up and down so as to sterilize, so that the comprehensiveness of sterilization in the air purification tank is ensured, the uniformity and the thoroughness of deep ultraviolet sterilization of air in the air purification tank are ensured by utilizing air flowing, the temperature and the humidity for sterilizing and purifying the air are ensured, and the treatment speed of air sterilization and purification is further accelerated.

A method, a device and a fish-farm for controlling the concentration of living organisms in fluid in order to facilitate the handling of the organisms such as grading and counting. The apparatus comprises a first in-feed channel for a flow of living organisms, a second in-feed channel for a flow of fluid, a chamber containing a lever for regulating the flows from the first and the second in-feed channels through the chamber, an outlet, a computer, and a sensor. The sensor is positioned in the first in-feed channel for detecting the density of living organism in the flow, and the computer continuously and automatically regulates the ratio of flows from the first and the second in-feed channels through the chamber and towards the outlet by the lever in response to the density of living organisms in the flows determined by the sensor.

The embodiment of the invention discloses a resource management method and device for a data warehouse system. The method comprises the steps that in a data warehouse system, data files are distributed and stored in all buckets (storage spaces) of storage services, all the buckets are mapped to all computing nodes respectively, and all the computing nodes store metadata information of the data files of the mapped buckets and are responsible for computing tasks of the mapped buckets; in response to a trigger event for adjusting the computing resources, according to a mapping relation between the bucket and the computing nodes before the computing resources are adjusted and a mapping relation between the bucket and the computing nodes after the computing resources are adjusted, determining that the bucket where the mapped computing nodes are changed is used as a bucket to be migrated, and taking the computing node to which the bucket to be migrated is mapped before the computing resources are adjusted as a source computing node; the computing node to which the computing resource is mapped after being adjusted is used as a target computing node; and migrating metadata corresponding to the to-be-migrated bucket from the source computing node to the target computing node. According to the invention, the capacity expansion and contraction duration of the cloud data warehouse can be effectively shortened.

The invention discloses a circular tooth knife for a plastic pulverizer and a grinding tool and a processing technology thereof, and belongs to the technical field of mechanical cutters. The circular tooth knife comprises a cylindrical knife body, n knife teeth are uniformly distributed in the length direction of the periphery of the knife body, n is larger than or equal to 30 and smaller than or equal to 50, a tooth groove is formed between every two adjacent knife teeth, and arc faces are arranged at the edges in the length directions of the groove bottoms of the tooth grooves. The grinding tool comprises a mounting unit, a positioning unit and a grinding unit, the mounting unit is used for supporting the knife body to be processed, the positioning unit is used for limiting rotation of the knife body on the mounting unit, and the grinding unit is used for polishing cutting edge faces of the knife teeth; and the mounting unit is located between the positioning unit and the grinding unit. The processing technology of a round blade is that after linear cutting is carried out, the grinding tool is used for grinding and machining the cutting edge faces. By means of the circular tooth knife, the sharpness of the circular tooth knife can be ensured, the service life can be prolonged, and the cutting edge faces of the knife can be conveniently and accurately ground.

The invention discloses a punch press mold, comprising a female die base plate and a female die; the bottom of the female die base plate is provided with a discharge port; the female die is embedded in the female die base plate; a female die hole is arranged on the female die of the upper end of the discharge port; a screw connection hole forming a certain angle with an axis of the female die hole is arranged on the female die; the screw connection hole is connected with an external high-pressure air source output port; the bottom of the screw connection hole is connected with an air inlet channel; an air outlet port of the bottom end is communicated with the female die hole; according to the scheme of the punch press mold, a male die after being punched and cut enters the air inlet port so as to blow a molded work piece off from the male die, in this way, the influence on machining speed and quality caused by the fact that the male die takes out the machined and molded work piece in the raising process is avoided.

The invention discloses a logistics unmanned aerial vehicle with an anti-collision function, and relates to the technical field of unmanned aerial vehicles. The logistics unmanned aerial vehicle with the anti-collision function comprises an unmanned aerial vehicle body, a storage rack is arranged at the bottom of the unmanned aerial vehicle body, a telescopic sleeve is fixed to the left side of the storage rack, a positioning rod is arranged in the telescopic sleeve in a sleeved mode, and a positioning buckle device is fixed to the top of the left end of the telescopic sleeve. According to the logistics unmanned aerial vehicle with the anti-collision function, goods can be stored by arranging the storage rack, when the unmanned aerial vehicle body is located on the ground, the insertion blocks are separated from the positioning grooves, and the storage rack can freely rotate, so that the gravity center position can be adjusted according to weight distribution of the goods; the gravity center of the whole unmanned aerial vehicle is located on the central axis of the unmanned aerial vehicle body, yawing of the unmanned aerial vehicle body in the flying process is avoided, and when the unmanned aerial vehicle body flies away from the ground, the storage rack is fixed through the positioning grooves by the insertion blocks and prevented from swinging.

The invention discloses a multistage chopping and grinding machine which comprises a box body, wherein a transparent top cover and feeding holes are formed on the top of the box body; the feeding holes are formed in two sides of the transparent top cover; a control cavity is formed inside the box body corresponding to the bottom of the transparent top cover; an upper gear, a middle gear and a lower gear are arranged inside the control cavity; rotating shafts are arranged on two sides of the upper gear, the middle gear and the lower gear; a chopping pipeline is arranged inside the box body corresponding to the bottom of the feeding holes; blades are arranged inside the chopping pipeline; the rotating shafts penetrate through the outer walls of the chopping pipeline to extend into the chopping pipeline so as to be fixedly connected with the blades. According to the multistage chopping and grinding machine disclosed by the invention, the diameter of the upper gear is larger than the diameter of the middle gear, and the diameter of the middle gear is larger than the diameter of the lower gear, so that the rotating speeds of the blades arranged from top to bottom can be gradually increased so as to realize multistage chopping, the materials are finely chopped, the chopping effect is excellent, the grinding workload is reduced, the chopped materials enter the grinding pipeline to beground via a conical bulge on the outer part of the grinding roller, and the materials are finely processed.

The invention relates to a mixing machine and particularly relates to a lubricating oil preparation mixing machine for an automobile engine. The invention aims at providing a lubricating oil preparation mixing machine for an automobile engine, which can be used for preparing lubricating oil in an airtight condition and can perform stirring and mixing through multidirectional rotation and realizes low time consumption in preparation. To achieve the aim, the invention provides the lubricating oil preparation mixing machine for the automobile engine, which comprises a mixing box and the like, wherein the right side of the bottom of the mixing box is connected with a discharge pipe; a valve is arranged on the discharge pipe; a mixing mechanism is arranged in the mixing box; the right middle of the mixing box is connected with a drive mechanism; the drive mechanism is connected with the mixing mechanism. According to the invention, through arranging the drive mechanism and the mixing mechanism, the purpose of carrying out stirring and mixing preparation on the raw materials in the mixing box is realized.

The invention discloses a novel combined bearing. The novel combined bearing comprises an outer ring, an inner ring, a row of balls and a row of cylindrical rollers, wherein the inner circumferentialwall of the outer ring and the outer circumferential wall of the inner ring are each annularly provided with a first roller path allowing the corresponding row of balls to roll, the inner circumferential wall of the outer ring and the outer circumferential wall of the inner ring are each annularly provided with a second roller path allowing the corresponding row of cylindrical rollers to roll, thefirst roller paths are located on one sides of the second roller paths, abutting grooves used for preventing the cylindrical rollers from bearing excessive overturning moment are formed in the innerwalls of the two sides of the two second roller paths correspondingly, limiting rings used for preventing the cylindrical rollers from bearing excessive overturning moment protrude out of the inner circumferential walls of the two second roller paths correspondingly, the outer circumferential wall of each cylindrical roller is annularly provided with a limiting groove allowing the corresponding limiting ring to be inserted therein, and the outer ring is provided with an oil supplementing piece used for supplementing oil into the bearing. The problems that in the prior art, a bearing is prone to damage under radial loads and axial loads, and oil supply in the bearing is insufficient are solved.

The invention discloses processing equipment with good dustproof effect for semiconductor device manufacturing. The equipment comprises a supporting plate, supporting frames are bolted to the front surface and the back surface of the top of the supporting plate, a processing box is bolted to the tops of the supporting frames, a dustproof mechanism is arranged in an inner cavity of the processing box, and a dust collection mechanism matched with the dustproof mechanism for use is arranged at the top of the inner cavity of the processing box. According to the equipment, through cooperation of a first air pump, a hose, a second motor, a driving gear, a first driven gear, a second driven gear, fixing pipes, a connecting pipe, a U-shaped pipe and a nozzle, a user can conveniently use the second motor to drive the two groups of the fixing pipes to rotate at the same time, so that the inner cavity of the processing box is blown in all directions through the rotating nozzle, furthermore, dust in the processing box is always in a floating state, and through cooperation of a second air pump, a ventilation pipe, a flow dividing pipe, a diffusion pipe, a pipeline and suction heads, the user can conveniently use the second air pump to drive the multiple suction heads to rapidly absorb the floating dust.

The invention discloses a shredding machine blade and a machining process thereof, and belongs to the technical field of tools. The shredding machine blade comprises a blade body, wherein the blade body is provided with blade heads, grooves and a mounting hole, the n blade heads are uniformly arranged at the edge of the blade body, 8<=n<=15, and preferably, n=13; the grooves are arranged at the joints between the adjacent blade heads, the groove surface of each groove is set as an arc surface or a spherical crown surface, the grooves are used for dispersing the impact force of materials on thejoints of the adjacent blade heads, it is guaranteed that the the impact force at all points on the groove surfaces is uniform, and the blade does not crack easily; cutting edges of the blade heads are composed of multiple arc cutting edge bodies with different radians so that it can be guaranteed that the sizes of shredded materials are smaller; the mounting hole is set as a regular octagon; andlinear cutting is used for moulding and forming the blade, and meanwhile the machining process of the blade is optimized. According to the shredding machine blade, in the blade shape optimization design, it is ensured that the sizes of the shredded materials are smaller, the service life of the blade is prolonged, and mass production and machining of enterprises are facilitated.

An encryption / decryption apparatus and a power analysis protecting method thereof are provided. The encryption / decryption apparatus adapted to perform encryption / decryption operation on digital data includes a data encryption / decryption unit, a random number generator, and a power analysis protecting circuit. The data encryption / decryption unit receives the digital data and performs an encryption / decryption operation on the digital data. The random number generator is used to generate random number data, the random number data has N bits, and N is a positive integer. The power analysis protecting circuit generates M kinds of power signals having different levels according to each bit data of the random number data when the random number data is received by the power analysis protecting circuit, and M is equal to the Nth power of 2.

The invention relates to the technical field of injection molds and particularly relates to a rapid-cooling injection mold. The rapid-cooling injection mold comprises a heat dissipation shell and a base plate, wherein a heat conduction pipe is fixedly mounted on the outer surface of the front end of the heat dissipation shell, an auxiliary heat conduction pipe is fixedly mounted on the outer surface, close to the lower part of the heat conduction pipe, of the front end of the heat dissipation shell, and a cold water machine interface is fixedly mounted on the outer surface of one end of the auxiliary heat conduction pipe; and a fixed mold seat plate is fixedly mounted on the outer surface of the upper end of the heat dissipation shell, a positioning ring is fixedly mounted in the middle ofthe outer surface of the upper end of the fixed mold seat plate, and a sprue bush is fixedly mounted in the positioning ring. The rapid-cooling injection mold is provided with the heat dissipation shell, the auxiliary heat conduction pipe and a ventilation valve, so that plastic can be maintained at a drying state, can be rapidly subjected to heat-dissipation cooling and then can be rapidly formed; and furthermore, the internal pressure of the mold can be adjusted, so that the rapid-cooling injection mold is applicable to different working conditions and has relatively good use prospects.

A received query is analyzed to provide a set of potential bushy tree operation plans that include the creation of one or more “sub-joins” that provide intermediate resultant “sub-tables”, and using these sub-tables as operands in the other predicates of the query. The received query is analyzed to identify “satellite” tables and “seed” tables. A satellite table is a table of the database that is filtered by a selective predicate, and is connected to only one other table in the database via at least one linking predicate, and a seed table is a table of the database that is connected to a satellite table and at least one other table. Multiple candidate operation plans are formulated as bushy trees that include a sub-join of each seed table and its connected satellite table. A least cost operation plan is selected for execution from among these candidate operation plans and the conventional least cost linear operation plan based on the costs associated with each operation plan.

An encryption / decryption apparatus and a power analysis protecting method thereof are provided. The encryption / decryption apparatus adapted to perform encryption / decryption operation on digital data includes a data encryption / decryption unit, a random number generator, and a power analysis protecting circuit. The data encryption / decryption unit receives the digital data and performs an encryption / decryption operation on the digital data. The random number generator is used to generate random number data, the random number data has N bits, and N is a positive integer. The power analysis protecting circuit generates M kinds of power signals having different levels according to each bit data of the random number data when the random number data is received by the power analysis protecting circuit, and M is equal to the Nth power of 2.

The invention relates to the technical field of collagen extraction, in particular to a method for extracting collagen from cowhide, comprising the following steps: (1) cowhide pretreatment: placing cowhide in compound enzyme solution A for constant temperature soaking treatment, leaching, rinsing, Cut into small pieces; put the cowhide block into the protective solution for soaking treatment, drain it out, and dry it in the air; (2) Removal of impurity protein: put the cowhide block into the compound alkali solution for processing, and then put it into the slightly acid solution Soak treatment, drain out, rinse with air, dry for use; (3) Kraft pulp preparation: mix the cowhide block, ice water, and protective agent, and send it into a high-speed homogenizer to homogenize to obtain Kraft pulp; (4) Collagen extraction: adding compound enzyme B to the obtained kraft pulp, stirring and extracting, and inactivating; solid-liquid separation, to obtain an extract for use; (5) collagen separation. The extraction method provided by the invention has high purity and extraction rate of collagen, and has good biological activity; and the process time is short.

The invention relates to a hydroelectric power generation device with a river surface cleaning function. The hydroelectric power generation device comprises a first fixing plate, a second fixing plate, a power generation mechanism, a collecting mechanism and a cleaning mechanism, wherein the power generation mechanism comprises a power generator, a rotating plate, a rotating rod and a storage battery; the cleaning mechanism comprises a connecting rod, a supporting rod, a connecting plate, a positioning plate, a first annular rack, a second annular rack and a cleaning assembly; and the collecting mechanism comprises a collecting box, an abutting plate, an auxiliary plate and a spring. According to the hydroelectric power generation device with the river surface cleaning function, power generation is achieved through the power generation mechanism, filtering of gravel is achieved through cooperation of the cleaning mechanism and the collecting mechanism, and the large gravel is moved to the two sides of the first fixing plate and the second fixing plate; meanwhile, cleaning of garbage on the surface of a riverway is achieved through a filter screen plate, and meanwhile garbage recycling and riverway cleaning are achieved; and meanwhile, protection of the rotating plate is achieved, the service life is prolonged, and the using practicability is improved.

A method for diagnosing a combustion machine, wherein the combustion machine comprises at least one internal combustion engine (1) and one intake air line (5) via which fresh air can be fed to the internal combustion engine (1). In addition, at least one intake air compressor (8) and, upstream from the intake air compressor, a control flap (15) are integrated into the intake air line. In one operating state of the combustion machine, the control flap is closed so far that a negative pressure relative to the ambient pressure is produced by means of the running internal combustion engine in theportion of the intake air line that lies between the control flap and the internal combustion engine, with an actual value that is associated with this negative pressure being compared with a target value and the presence or absence of leakage in this portion of the intake air line being deduced from any difference that might exist between the actual value and the target value.

The invention discloses an image comparison method and a system thereof. The image comparison method specifically comprises the following steps: obtaining a frame image; judging whether frame images with repeated periods exist in the frame images or not; if the period repetition exists, dividing the frame image, and carrying out synthesis processing on the divided frame image; performing connection processing on each frame of image; and performing light and shade division on the connected frame images, and completing image comparison according to the divided areas. According to the image comparison method and the system thereof provided by the invention, the problem that artifacts may exist in the images can be eliminated in the comparison process, so that the comparison result is more accurate.