32results about How to "Achieving Accuracy Requirements" patented technology

The invention provides a double-layer trigger intrusion detection method based on flow prediction. A lower-layer model is triggered according to a certain rule only when it is detected that an upper-layer model is abnormal and an abnormal area occurs, so that energy use of nodes is reduced and accuracy of detection results can be guaranteed. The method includes the step of data collecting, the step of data analysis, the step of triggering and judgment and the step of starting of a local intrusion detection model, wherein in the step of data collecting, a monitoring node periodically collects data flow information in a network and transmits the information to a base station; in the step of data analysis, the base station receives the information sent by the monitoring mode and then carries out flow prediction on historical data of the monitoring node according to an ARIMA model; in the triggering and judgment step, the base station sends an abnormity alarm to a sink node when the difference between a flow prediction value and a true value exceeds a preset threshold, and a local intrusion detection system is started in the abnormal area; in the step of starting of the local intrusion detection model, when the sink node receives the abnormity alarm, a second-layer intrusion detection model, namely a local intrusion monitoring model, is started in sink nodes and common nodes of areas, where abnormity occurs, in the alarm.

The invention discloses a couple-part symmetry-degree zero-error positioning device, which comprises a substrate, a positioning assembly, two clamping adjusting assemblies and two pneumatic clamping assemblies; the position of a rotary positioning screw in the positioning assembly is fixed and adjusted by adopting the helical-type self-centering compression way, the two clamping adjusting assemblies and the two pneumatic clamping assemblies realize synchronous and symmetric clamping and adjustment so as to limit the freedom of a couple part in the left-right direction, other degrees of freedom of the couple part are limited by utilizing a front baffle plate, a rear baffle plate and a pressure plate simultaneously, so that the couple part is clamped and positioned. The device utilizes the advantages of a centering clamping way and a synchronous symmetric movement way to avoid the influence of installation error and repetition precision error on the positioning error of the position, so that the zero-error positioning precision requirement of the couple part is realize theoretically. The couple-part symmetry-degree zero-error positioning device is simple in structure and strong in practicability; and moreover, the positioning position of the couple parts also can be adjusted according to real requirement. The device is also applicable to the positioning of multiple couple parts and wide in application range.

The invention discloses a connecting pipe and flange assembling device, belongs to the technical field of oil and gas field connecting pipe assembling, and aims to solve the problems that manual connecting pipe flange assembling efficiency is low through a skid mounted unit and assembling quality is difficult to guarantee. The assembling device comprises an L-shaped operating platform, a fixing support member, a rail, a flange fixing member, a flange, a rotary shaft, a locking nut, a planar pushing ball bearing, a deep groove ball bearing and the like. According to the device, by controlling the coaxiality during connecting pipe and flange assembling, high accuracy of connecting pipe and flange assembling is guaranteed, and consistence requirements of assembling gaps and unfitness of butt joint in the same batch can be improved; in addition, by adjusting the device once, rapid assembly of connecting pipes and flanges in batches can be implemented, labor force is saved, and assembling efficiency is improved.

The invention discloses a large irregular bus-shaped surface shell uniform thinning machining method and device. According to the large irregular bus-shaped surface shell uniform thinning machining method and device, a programmable uniform thinning model is generated, the blank curvature change rule is combined, and a sectional type turning method and a layered turning method are utilized to complete a certain aluminum alloy dry cutting process; and a set of shell blank uniform thinning machining device system is designed and directly added on numerical control equipment, so that the requirements of uniform thinning machining of blanks in a forming mode such as spinning/casting can be met, the requirements of the sectional type turning process and the layered turning process are met, the requirements of the large-end rigid clamping process are met, the error caused by main shaft jumping in the turning process is solved, precision compensation is realized, uniform thinning machining ofparts is realized, the problems of low chemical milling efficiency and heavy pollution after the parts are taken down through spinning and subjected to heat treatment deformation are solved, and the requirements of weight and precision are met.

The invention provides an optical distance doubled dynamic collimation interferometer. The optical distance doubled dynamic collimation interferometer comprises a beam splitter, a motion bearing is arranged at one side of the beam splitter, the beam splitter and the motion bearing are arranged in a manner of forming a 45-degree included angle, two ends of the motion bearing are respectively connected with a connecting rod, and two corner reflectors are respectively arranged on the connecting rods; a dynamic collimation reflector is arranged in a manner of forming the 45-degree included angle with the beam splitter, a transmission light of the dynamic collimation reflector is reflected to the corner reflector below, corresponding movable reflector is combined, and the corner reflector over the movable reflector is used as a fixed reflector. The optical distance doubled dynamic collimation interferometer provided by the invention has the benefit that effective optical distance of the dynamic collimation interferometer is doubled without adding the scanning stroke of the movable reflector, and the resolution ratio of a FTIR is improved; structure of the interferometer is greatly simplified to be more compact, the volume and the weight of the interferometer can be greatly reduced, and implementation of miniaturization of the interferometer is facilitated; a dynamic collimation control system is used, the dynamic collimation reflector continuously adjust the posture according to the returned information, so that the interference can be always in the best status, and requirement on accuracy of guide rails is reduced. The optical distance doubled dynamic collimation interferometer implements the perfect match of the cost and the benefit.

The invention discloses a test instrument for testing the adhesion time of a three-phase contact of a vacuum circuit breaker. The test instrument comprises a display unit and a test unit which are connected. The test unit comprises a programmable logic controller (PLC) and a test circuit. One of the movable contact and the fixed contact of a contactor KM is connected with the input common end of the PLC and the other one is connected with another input end of the PLC. An intermediate relay MY2NJ is connected between an output end and an N end. The contactor KM is connected in series with a normally-open contact MY2NJ and then connected to an AC power supply. The display unit comprises a text display connected with the PLC via a data line. By means of the control of the PLC to an external relay and time detection of the contact of the vacuum circuit breaker returned to a S7-200 module, the test instrument achieves a debugging precision requirement of a vacuum contactor and displays a result on a TD200 text display in order that a professional may easily overhaul and debug .

The invention discloses a small-hole-opening extra-high-water-head integral-casting plane operating gate with a fixed wheel. The gate comprises a casting gate body (10), a top side water seal mountingseat (12) is arranged on the upstream surface of the casting gate body, the cross section of the top side water seal mounting seat is in a rectangle shape provided with a groove (13), a top side water seal assembly (30) is mounted in the groove, the top side water seal assembly comprises a top side water seal (31), the shape of the cross section of the top side water seal is similar to the shapeof the Chinese character "shan", a pair of parallel hollow cavities (34) are formed in the bottom of the Chinese character "shan" shape, and the hollow cavities communicate with the inner side of thetop side water seal mounting seat through a communication hole (14) in the bottom of the groove. According to the gate, the top side water seal adopts a pressurized water seal which is in the shape ofthe Chinese character "shan", the communication hole is formed in the inner side of an approximately-concave convex body so that the top side water seal can communicate with an upstream water body, the water seal which is in the shape of the Chinese character "shan" extends to the upstream side through the water pressure to be in close contact with a water stop seat plate of the top side water seal, wherein the higher the water head, the closer the contact is, so that the water stopping effect of the gate under the extra-high water head is effectively guaranteed.

The invention provides an apparatus and a method for measuring the speed of a rail vehicle. The apparatus includes at least two test devices and a processor. The test devices are fixedly arranged on avehicle at intervals along the moving direction of the vehicle, and send out a pulse signal when the vehicle passes by a sleeper. The processor obtains the speed of the vehicle according to the timedifference between the at least two test devices in pulse signal sending and the interval distance between the corresponding test devices. The apparatus has the advantages of simple structure, high accuracy and good maintainability.

The invention discloses an electronic transformer error measurement device and method, and the method comprises the steps that a synchronous photoelectric clock source transmits second pulse signal toa merging unit and a data collection module of a to-be-measured electronic transformer when an upper computer transmits a test instruction; the on-line monitoring module receives a network message data frame sent by the merging unit of the electronic transformer to be detected after receiving the second pulse signal, and analyzes the network message data frame to obtain detected electric energy sampling data of the electronic transformer to be detected; the data acquisition module acquires electric energy data of a standard electronic transformer after receiving the second pulse signal so asto acquire reference electric energy sampling data; and the error calculation module performs asynchronous measurement processing on the measured electric energy sampling data and the reference electric energy sampling data, and calculates the error of the to-be-measured electronic transformer according to the measured electric energy sampling data subjected to asynchronous measurement processingand the reference electric energy sampling data subjected to asynchronous measurement processing.

The invention provides an adjustable temperature controller intelligent system based on environment temperature. The adjustable temperature controller intelligent system comprises a micro-control circuit based on a single-chip microcomputer as a core chip, an A/D converter, a kick type temperature controller based on two bimetallic strips and a temperature acquisition circuit based on a thermistoras a main sensor, wherein the kick type temperature controller comprises an elastic piece, a first insulating piece, a second insulating piece, a third insulating piece, a first fixed contact piece,a second fixed contact piece, a third fixed contact piece, a first bimetallic strip, a second bimetallic strip, an insulating ceramic meter and a ceramic piece. According to the invention, a single-chip microcomputer high-precision intelligent temperature control system design is adopted, and a 16-bit single-chip microcomputer and a 32-bit A/D converter are combined to form a temperature acquisition system. By adopting digital PID control, the temperature control precision can be +/-0.5 DEG C, and the continuous adjustment of a temperature set value can be realized.

The invention discloses a discharging mechanism of a high-molecular material. The discharging mechanism of the high-molecular material comprises a discharging roller, an auxiliary discharging roller and a discharging shell, wherein the discharging roller and the auxiliary discharging roller are meshed with each other; and the discharging shell is arranged outside the discharging roller and the auxiliary discharging roller in a sleeving mode, and a discharging opening and a discharge opening are respectively formed in the discharging shell; and discharging grooves are formed in the dischargingroller and the auxiliary discharging roller, the form of the discharging groove of the discharging roller is matched with the weight of the to-be-discharged high-molecular material, the depth of the discharging groove of the auxiliary discharging roller is matched with the particle size of the to-be-discharged high-molecular material. The arrangement and specific parameters of the specific structures on the discharging roller and the auxiliary blanking roller are designed according to the weight and the particle size of the granular polymer material, so as to solve the technical problem in theprior art.

The invention discloses a small-orifice integral casting type plane fixed wheel bulkhead gate. The small-orifice integral casting type plane fixed wheel bulkhead gate comprises a casting door body (10). A top side water seal mounting groove (12) is formed in the downstream surface of the casting door body, the cross section of the top side water seal mounting groove is in a rectangular shape, andthe top side water seal mounting groove is internally provided with a top side water seal assembly (30). The top side water seal assembly includes a steel-based sliding block (31) and a rubber pad (32). The steel-based sliding block and the rubber pad are fixed into the top side water seal mounting groove by a set of countersunk screws (33). A bottom water seal mounting groove (15) is formed in the bottom surface of the casting door body, and the bottom water seal mounting groove is internally provided with a bottom water seal assembly (40). A bottom water seal (41) in the bottom water seal mounting groove is fixed into the bottom water seal mounting groove through a bottom water seal pressing plate (42) and a set of countersunk screws. The bottom water seal and the rubber pad in the top side water seal assembly are tightly connected at both ends. The small-orifice integral casting type plane fixed wheel bulkhead gate can effectively guarantee the water stopping effect of the bulkheadgate under a special high water head.

The invention relates to a node current injection based single three-phase hybrid tide calculation method. The technical feature of the method is that the method includes steps of 1, constructing a single three-phase hybrid model used for power distribution network tide calculation; 2, performing power distribution network calculation by adopting a node current injection method based on the singlethree-phase hybrid model used for power distribution network tide calculation constructed in step 1. According to the invention, influence due to zero sequence and negative sequence components are taken into account, and calculation precision is ensured at the same time of ensuring the calculation speed.

The invention belongs to the technical field of automobile bodies in white, and particularly relates to a method for improving positioning strength of a built-in clamp. The method comprises the following steps that 1, fixing positions of a first supporting unit and a second supporting unit are arranged on the two sides of gravity center of a side wall assembly; 2, the first supporting unit and thesecond supporting unit are designed and installed; 3, the first supporting unit and the second supporting unit are mounted on site, X, Y and Z data of a profiling block is measured in a three-coordinate mode, and the first supporting unit and the second supporting unit are adjusted to theoretical positions; and 4, pressure control valves of the first supporting unit and the second supporting unitare adjusted in combination with load variation of a side wall assembly positioning pin. According to the method for improving positioning strength of the built-in clamp, the influence of gravity ofthe side wall assembly on strength of the overturning positioning pin is eliminated through a method of adding the side wall assembly supporting units to a floor clamp, and the problem of insufficientpositioning strength of an existing built-in clamp is solved.

The invention relates to a conveying and machining system based on an AGV. The conveying and machining system based on the AGV comprises an AGV circulation route, an AGV body, a plurality of process stations and a tooling. Specifically, the AGV circulation route is arranged on the ground of a machining area; the AGV body is arranged on the AGV circulation route and can perform programmed intermittent displacement along the AGV circulation route; the plurality of process stations are arranged along the AGV circulation route; workshop storage positions are arranged at the tail ends of the process stations; the tooling is arranged above the AGV body, parts to be machined can be placed on the tooling, the tooling move to all the process stations along with the AGV body to be machined, and then the AGV body drives the tooling to enter the next machining period. Compared with the prior art, by means of the loading function and the flexible switching characteristic of the AGV, the functions of a tool clamp are integrated on the AGV, the AGV has the composite functions of transportation and positioning, and space and equipment are saved.

The invention discloses an automatic production system for cowhide type dog chews. According to the technical scheme, the automatic production system is characterized by comprising a cowhide strip rolling machine, a chicken stirring device and a conveying device; the cowhide strip rolling machine comprises a feeding device, a discharging device and a rolling device, the feeding device is used for conveying cowhide strips to be rolled, the rolling device is used for rolling the cowhide strips to be rolled, and the discharging device is used for receiving and delivering cowhide rolls; the chicken stirring device comprises a material injection part, a stirring part, a material discharge part and a delivery part, the material injection part is used for injecting minced chicken and seasonings, the stirring part is used for stirring the chicken and the seasonings, and the material discharge part is used for extruding dried chicken slices; the delivery part is arranged below the discharging part and is used for carrying out rotary delivery operation on the cowhide roll, so that the dried chicken slices fall on the cowhide roll; according to the automatic production system for the cow leather type dog chews, the production efficiency can be improved, the production quality can be improved, and it is guaranteed that the production appearance is attractive.

The invention relates to the technical field of computer software, and relates to the technical field of information search, in particular to a method for quickly searching a 10 billion-level image. Comprising the following steps: processing image sample data, performing image feature extraction on 10 billion-level image sample data by using a deep neural network, and forming a feature vector library of an image after PCA dimension reduction; at least two stages of PQ groups are constructed by using an IVPQ algorithm, each stage of PQ group at least comprises three PQs, and it is ensured that the segmentation numbers of feature vectors are co-prime pairwise, so that a feature vector index database is formed; based on the feature image index database, an optimal candidate set can be obtained during retrieval, similarity calculation and sorting are performed on the optimal candidate set, and finally a final sorting TOPN is output. Compared with FAISS, the method has higher accuracy, in single server operation, the recall rate of Top10 reaches 61.8%, the operation stability is better, 220 real concurrency is supported, the throughput rate reaches 10000 times, the average response time is 30 ms, and the retrieval efficiency is higher.

The invention relates to a line spectrum confocal sensor which comprises a light source, a light source optical fiber, a dispersion objective lens, a spectrograph, a spectrograph optical fiber and a spectrograph optical fiber fixing structure. The spectrograph optical fiber fixing structure is used for fixing the second light inlet end and comprises an X-direction sliding block, a Y-direction sliding block and a bottom plate, the Y-direction sliding block is detachably connected with the X-direction sliding block in a sliding mode in the Y-axis direction, and the relative positions of the X-direction sliding block and the Y-direction sliding block are locked through a locking piece. An open hole is formed in the Y-direction sliding block, the second light inlet end open hole is formed in the open hole in an axial sliding mode and can be pressed to an opening of the open hole through a limiting piece so as to fix the second light inlet end, the axial direction of the open hole is arranged in the width direction of the X-direction sliding block, and an X-direction sliding block groove formed in the length direction of the X-direction sliding block is formed in the bottom of the X-direction sliding block; a boss corresponding to the X-direction sliding block groove is arranged on the bottom plate. The spectrometer optical fiber fixing structure solves the problem of poor measurement precision.