40results about How to "No impact on operation" patented technology

The invention relates to a DVR (Dynamic Voltage Restorers)-based low-voltage ride through support device of a wind generating set, consisting of a DVR, an active power release circuit, a network-side reactive current injection inverter and a controller, wherein the DVR is provided with a port A, a port B and a port C, wherein the port A is connected with the output end of the wind generating set, the port B is connected with a grid, a filter input side of the DVR is connected to a main loop in a serial connection mode, an output side of an H bridge inverter is the port C, and a direct-current capacitor is arranged in the port C; the reactive current injection inverter is provided with a port AC and a port DC, wherein the port AC is connected with the port B of the DVR, and a direct-current bus capacitor is arranged at the port DC; a stator Crowbar is provided with a port AC and a port DC, wherein the port AC is connected with the port A of the DVR, and the direct-current bus capacitor is arranged at the port DC; and a working state of the DVR is controlled by a triggering signal sent by the controller.

The invention relates to an intelligent power control unit (IPCU) for low voltage ride through, which comprises a port A, a port B, a port C, a built-in auxiliary frequency converter for stabilizing stator voltage at the moment of ride through and for providing reactive power, and a controllable active load for absorbing active power; a high speed switch is arranged between the port A and the port B; the built-in auxiliary frequency converter is arranged between the port A and the port C; and the built-in auxiliary frequency converter and the controllable active load are sequentially connected between the port A and the port C in series or connected with the controllable active load from the port A through a three-phase bridge-type rectifier, so that the branch circuit of the built-in auxiliary frequency converter is connected with that of the controllable active load in parallel. When the IPCU is used, the port A is connected with the stator winding of a wind generating set, the port B is connected with the power network, and the port C is connected with the DC bus of an external auxiliary frequency converter.

The invention discloses an industrial control system oriented active vulnerability detection system and detection method and relates to the field of industrial control system security. A client server mode is employed in the vulnerability detection system. The system comprises a controller, clients, a server, an evaluation report module and a data center. The controller is connected with the server. The server is connected with the different clients. The clients are connected with the internet through a firewall and a router and also can be connected with the data center for data interaction. Moreover, the server is connected with the data center for data interaction. An evaluation report is generated according to data provided by the data center. The system and the method have the advantages that according to the provided vulnerability detection system, attack code is unnecessarily developed. Compared with an MBSA (Microsoft Baseline Security Analyzer) vulnerability detection system developed by the Microsoft, the system has the advantages that the detection speed is fast, the accuracy is high, the high-stability and high-timeliness demands of the industrial control system can be satisfied well, the system is suitable for a manager to evaluate the security condition of the whole industrial control system, and the stable operation of the industrial control system is not influenced.

The invention relates to the field of communication and internet, in particular to a configuration management system and method. According to the system and the method, after updated configuration information is set by a CMCS (configuration management center system), the CMCS is started and the configuration information is incrementally registered to a registry by a configmanager, a CMCS client and the registry automatically and asynchronously push updated configuration information meeting screening principles to the CMCS client and unload the information to a configuration file according to established subscription relations and preset screening principles, and an APP function unit reads updated data in the configuration file to finish updating operation of the APP; besides, when the CMCS service is halted, the APP can still work according to the configuration information stored in the configuration file, that is, according to the improved system and method, the system management is automatic, the updating timeliness is high, the operation is simple, and the client is still available when the configuration service is halted.

The invention discloses a desulfurization wastewater dechlorination treatment method and desulfurization wastewater treatment equipment. The method comprises the following steps: A, firstly, adding anacid into the desulfurization wastewater to adjust the pH value to 0.5-4, and then stirring and mixing with a liquid resin; B, separating an obtained mixture in a separation chamber; C, enabling theseparated liquid resin to enter a liquid resin buffer tank, and enabling separated desulfurization wastewater to enter a next-stage reactor for further treatment; and D, repeating the steps A, B and Cin the treatment process, removing the liquid resin dissolved in the water in an air floatation oil removal device, taking the desulfurization wastewater treated through air floatation treatment andpH adjustment as reuse water, and conveying the liquid resin brought out by bubble floatation into the liquid resin buffer tank. The method has the advantages that the equipment investment is small, the operation cost is low, the produced water after chloride ion removal can meet the industrial water recycling requirement, no waste is generated in the treatment process, real-time adsorption and real-time regeneration are achieved in the reaction process, 100% removal of chloride ions can be achieved, the whole process is continuously operated, waiting and time delay are not needed, and the production efficiency is high.

The invention provides a real-time transmission ocean power parameter buoy system. A lower end of a communication buoy is hung with a coupling transmission cable, and the upper end of the coupling transmission cable is provided with a sensing coupling data receiving ring, the lower end is provided with a sensing coupling data sender, and the middle part is provided with a warm depth measuring instrument and a warm salt depth measuring instrument; the lower end of the coupling transmission cable is hung with an acoustics Doppler flow velocity section plotter and an acoustics Doppler flow velocity section plotter cell silo through a buckle; a data conversion circuit of the acoustics Doppler flow velocity section plotter is connected with the sensing coupling data sender through a watertight feed line; the lower end of the acoustics Doppler flow velocity section plotter is connected with a float ball, and the lower end of the float ball is provided with a rotating ring; the rotating ring is connected with an acoustics releaser; the acoustics releaser is connected with a steel cable and a sinking block through a hoisting ring. By using the sensing coupling technology, the real-time transmission ocean power parameter buoy system transmits data with the sensor, and data is uploaded to a shore through a sea network; thus the real-time uploading and treatment can be realized.

The invention discloses a coupled generating system matched with a steel ball milling system and used for drying sludge by using smoke. The coupled generating system comprises a drying machine, a drysludge storage bin and a boiler, wherein the drying machine is used for dehydrating and drying high-moisture sludge of a sewage treatment plant after dehydration, an outlet of the drying machine is connected to an inlet of the dry sludge storage bin, both an outlet of the dry sludge storage bin and an outlet of a coal bunker are connected to a position, to which steel balls are added, of the top of a steel ball coal mill, an outlet of the steel ball coal mill is connected to a boiler furnace, and high-temperature smoke between a boiler economizer and an air preheater is used for supplying a required drying heat source to the drying machine. According to the coupled generating system, the high-temperature smoke of the boiler is extracted to enter the sludge drying machine so as to dry the sludge in the drying machine and reduce the water content of the sludge, the dry sludge is directly sent to the steel ball coal mill to be milled, and the dry smoke is directly sent to the boiler furnace to burn, so that while sludge drying and coupled generation are realized, the problem of treatment of pollutants released in a sludge drying process is solved.

The invention discloses a picture retrieval method-based vehicle license plate recognition method and system. Recognition theory of the method comprises the following steps of: obtaining a video streaming; positioning and tracking target vehicle license plates in the video streaming, and extracting a plurality of target vehicle license plates; respectively extracting feature values of the plurality of target vehicle license plates so as to obtain a plurality of target vehicle license plate feature values; combining the plurality of target vehicle license plate feature values to obtain a targetvehicle license plate feature value group; and comparing a feature value of a to-be-searched vehicle license plate with the target vehicle license plate feature value group and outputting a search result. According to the method and system, feature values of to-be-searched vehicle license plates are compared and matched with the target vehicle license plate feature values obtained in a monitoringmanner so as to realize the vehicle license plate search, and the vehicle license plate numbers in monitoring do not need to be specifically recognized, so that the vehicle license plate search efficiency and correctness can be remarkably improved; and meanwhile, fuzzy vehicle license plates obtained in monitoring also can be accurately recognized without recognizing the vehicle license plate numbers.

The invention relates to the field of reconstructed railway engineering measurement, and provides an existing railway line cross section measurement method based on airborne LiDAR point cloud, which aims at overcoming the defects of an existing railway line cross section measurement scheme in the prior art and is high in practicability, high in operation efficiency, low in operation difficulty and high in safety. The method comprises the following steps: S1, making cross section lines of each mileage according to railway line shape parameters; S2, importing the cross section line and the preprocessed airborne LiDAR point cloud data into point cloud processing software; S3, setting a cross section cutting width and cutting a point cloud; S4, classifying terrain feature change feature points on the line; S5, outputting a classified point cloud data result; S6, replacing the point cloud classification code with a code in the report point dictionary; and S7, performing format conversion and outputting a section result.

The invention relates to a fermentation tank online sampling and diluting system and a technology thereof. The fermentation tank online sampling and diluting system comprises a sampling system, a diluting system and a control system; the sampling system is connected with a reactor, through PLC automatic control, sampling is finished in the reactor, and filtering pretreatment is performed on a sample through a filter; after detection is finished, steam and sterile air can be introduced to perform cleaning and sterilization on the whole sampling system, so that the safe and stable running of thereactor is ensured; and the diluting system can dilute the sample in a detection range of a detection sensor and can run with high accuracy through switching of a valve. The system and the technologyprovided by the invention have the advantages of high safety, high automation degree, high accuracy and the like.

The invention discloses an ultra-low-energy consumption flash evaporation concentration system for zero discharge of desulfurization wastewater and industrial salty wastewater. The system comprises aflash concentrator, a water-water heat exchanger, a jet device and a fluidized bed dryer, wherein a partition plate, a mist eliminator, an atomizing nozzle and a condenser are arranged inside the flash concentrator, the inlet of the atomizing nozzle is connected with the refrigerant outlet of the water-water heat exchanger, and fresh salty wastewater and a part of concentrated wastewater are introduced from the refrigerant inlet of the water-water heat exchanger; the bottom of the flash concentrator is connected with the inlet of the fluidized bed dryer through the concentrated wastewater, theheating medium of the water-water heat exchanger is low-grade circulating hot water, and the outlet of the condenser of the flash concentrator is connected with the inlet of the jet device; and cooling water is introduced from the inlet of the condenser, and a suction chamber of the jet device is connected with the exhaust mouth of the flash concentrator, so that a vacuum state of the flash concentrator is maintained. The source of fluidizing air of the fluidized bed dryer is hot air or hot flue gas, dried crystalline salt is discharged from the top into a dust collector for collection, and the system has the advantages of zero discharge of the wastewater, zero energy consumption of treatment, small system equipment, low cost and safety and stability.

The invention discloses an automatic load regulation, operation and protection method for converter saturated steam turbine and motor combined dragging power generation, and belongs to the technical field of low-pressure saturated steam utilization. Problems that in the prior art, steam is unstable, the energy utilization efficiency is low, and system operation is unstable are solved. The technical key point is that the method comprises: S1, setting a meshing rotating speed; S2, setting a rotating speed control mode; S3, switching to a valve control mode after meshing is successful; S4, activating a valve position automatic mode; S5, entering an automatic mode; S6, reducing a valve position adjusting speed; S7, reading the comprehensive heat storage index value and the preset heat storage value corresponding valve position by a DCS of the dragging steam turbine system; adjusting the valve position to the valve position corresponding to the read heat storage value; when the work of the steam turbine exceeds the fan power consumption, switching the frequency converter automatically to a power generation mode, and when the work is smaller than the fan power consumption, switching the frequency converter to a power supply mode; S8, entering a manual mode; and S9, increasing the adjusting rate. The method is used for controlling the converter saturated steam turbine and motor combined dragging power generation system.

The invention discloses a ring optical transmission network route switching method and device. The method comprises that: under the situation that an output voltage of a power supply of a base station is less than the preset voltage threshold value through monitoring, the connection state of normally working two optical routes which are respectively connected with two adjacent base stations of the base station are switched into direction connection of the two optical routes according to the monitored normally working optical routes so that once power of the base station is about to be off through monitoring, the base station exits a ring optical transmission network and the two adjacent base stations of the base station are directly connected. The processing process can be automatically performed, and the processing process is rapid and effective with almost no influence on network operation so that problems in the prior art that the whole ring optical transmission network fails to work caused by the fact that one base station cannot work and another base station powers off at the same time in the ring optical transmission network can be avoided, and thus the problems that the solution scheme is low in efficiency and long in time consumption with substantial influence on the operation of the ring optical transmission network can be avoided.

The invention belongs to the technical field of power transmission and distribution network fault current limiting, and relates to a novel self-driven modular current limiting device, which comprisesan electric reactor L, a circuit breaker CB and a high-voltage rheostat R, wherein the high-voltage rheostat R is connected with the electric reactor L in parallel and then connected with the circuitbreaker CB in series, a ceramic resistor is in a door shape, a sliding rail is arranged on the inner side of the ceramic resistor, the lower end of the ceramic resistor is connected with L-shaped electrodes, the electrodes on the two sides of the ceramic resistor are parallel and perpendicular to a liquid metal sliding block, the liquid metal sliding block is arranged between the electrodes, an insulating piece is arranged at the lower end of the liquid metal sliding block, And the electrodes on the two sides are connected with the two ends of the electric reactor L respectively, so that the high-voltage variable resistor R and the electric reactor L are connected in parallel. According to the invention, the self-driven variable impedance module is a resistive load, so that overvoltage andinrush current cannot be generated in the current limiting and conversion process; and the self-driven variable impedance module and the current-limiting reactor are convenient for modular design, and can be flexibly connected in series and in parallel according to application occasions.

The invention relates to a double-feed current transformer with perfect and reliable low-voltage ride-through capability, which consists of a rapid internetworking switch GK, a direct-current unloading unit DBU, a stator side dynamic power consuming unit DPC, a transient reactive current compensation unit TSTATCOM, an AC / DC (alternating-current / direct-current) rectification switch EK, a filter, a PWM (pulse-width modulation) rectification network side current transformer GSC, a rotor side inverter transformer RSC and a controller KZQ. The double-feed current transformer is provided with a port A, a port B and a port C, wherein the port A is connected with a stator of a double-feed wind-driven power generator, the port B is connected with a power grid, and the port C is connected with a rotor of the double-feed power generator; the stator side dynamic power consuming unit DPC is connected with the stator of the double-feed power generator through the port A, the direct-current unloading unit is connected with public direct-current buses of the GSC and the RSC, the transient reactive current compensation unit TSTATCOM is connected with the power grid side, the alternating-current end of the AC / DC rectification switch EK is connected with the stator of the double-feed power generator, and the direct-current end of the AC / DC rectification switch EK is connected with the public direct-current buses; and the working state of each part of the double-feed current transformer is controlled by signals transmitted by the controller KZQ.

The invention discloses a d-axis positive direction determination method of a permanent magnet synchronous motor, comprising the steps that firstly a pulsating high frequency current injecting methodis adopted to establish a rotor closed loop system, and the d-axis voltage response is obtained; secondly, the amplitudes of the d-axis voltage response (1) are recorded when the injection current signal phase is pai / 2, 3pai / 2; the value of the two amplitudes are compared, and the d-axis positive direction is determined, and the compensation value of the d-axis positive direction after determination can be obtained. The rotor synchronization rotating coordinates q-axis current can be set as 0, and the d-axis current is injected with a pulsating high frequency sinusoidal signal, and the rotor closed loop system can be established, and the d-axis voltage response of the rotor synchronization rotating coordinates can be extracted. The invention is advantageous in that during the process of determining the d-shaft positive direction, the injected current is always the sine high frequency signal, and signals of other types like positive and negative pulse are not required to be injected, and estimation process can be simplified; motor running cannot be affected; the structure is simple, reliability is high, operation complexity can be reduced, and the process of estimating the initial position can be simplified.

The invention discloses an online cleaning basket filter for a high-concentration formaldehyde pipeline in the production technology of trioxymethylene. The basket filter comprises a basket filter body, a scraping jet cleaner, a hollow cleaning support rod I, a hollow cleaning support rod II, a hand wheel, a transmission rod and a transmission force distribution plate; a sealing cover is arrangedat the upper open end of the basket filter body, the hollow cleaning support rods I and the hollow cleaning support rod II respectively vertically go through the sealing cover and are connected with the scraping jet cleaner, the top ends of the hollow cleaning support rod I and the hollow cleaning support rod II are located at the upper part of the sealing cover and are respectively connected withthe lower end of the transmission rod through the transmission force distribution plate, the upper end of the transmission rod is connected with the hand wheel, and the hand wheel is located at a power support at the upper part of the sealing cover. The basket filter can realize online cleaning at any time without affecting the running of a system, and also can realize closed cleaning in order toeffectively control the pollution of toxic and harmful media to the environment and the occupational health of operators. The basket filter prolongs the overhaul period to one year or above in orderto greatly reduce the workload of the operators.

The invention discloses a transformer substation real-time online anti-misoperation system based on the multimode Internet of Things. The system comprises a monitoring host, five-prevention machine, concentrators and terminal collectors. The five-prevention machines are in communication connection with the monitoring host, and the five-prevention machines are connected with an emergency unlockingdevice. Each five-prevention machine is connected with at least one concentrator through communication, each concentrator is connected with a plurality of terminal collectors through communication, and each terminal collector is connected with a plurality of anti-misoperation intelligent terminals. The operation safety of the lock is comprehensively guaranteed, and the operation efficiency is greatly improved; compared with a mechanical program lock, the system greatly improves the overall operation reliability of the lock, and greatly relieves the working intensity and labor time of operationand maintenance personnel; compared with microcomputer misoperation prevention, the system can solve the problem that malignant misoperation accidents frequently occur due to the fact that a master key is used for unlocking operation from the source; the intelligent operation management is realized, the system cost is effectively reduced, the repeated investment is avoided, and the input-output ratio is improved.

The invention discloses a sunken-type air return opening air purifier. The sunken-type air return opening air purifier comprises an outer box, an inner box and a plurality of PUSH-PUSH structures arranged between the outer box and the inner box. Each PUSH-PUSH structure comprises a connecting lock which is arranged inside the outer box and a connecting rod which is arranged on the inner box and is matched with the connecting lock. A grid panel is arranged at the bottom of the inner box. The grid panel is sequentially provided with a primary filter, a medium efficiency filter, negative-ion generation boxes, a high efficiency filter and a physical adsorption device. By means of the sunken-type air return opening air purifier, PM2.5, formaldehyde, carbon monoxide, sulfur dioxide, hydrocarbon and the like in a room environment can be effectively filtered out, and the purification efficiency of the air in a room is improved; and moreover, the structure is simple, mounting and dismounting are easy to operate, transportation is made convenient, using space is reduced, and the later-period use and maintenance cost is reduced.

The invention relates to the technical field of water treatment, and particularly relates to and discloses intelligent distributed purification tank sewage treatment equipment comprising an oil separation grit chamber, an oxygen elimination tank, an anoxic tank, an aerobic tank and a sedimentation tank which are communicated in sequence, fillers are arranged in the oxygen elimination tank, the anoxic tank and the aerobic tank; aeration devices are arranged at the bottoms of the anoxic tank and the aerobic tank; an aerobic return pipe is connected to the oil separation grit chamber from the aerobic tank; a sludge return pipe is connected to the oil separation grit chamber from the sedimentation tank, a transition pipe is connected to the sedimentation tank from the aerobic tank, a large airpump is connected with the sludge return pipe and the aeration devices, a small air pump is connected with the transition pipe, a floating ball liquid level probe is located in a water inlet tank, and an electric control cabinet is connected with the floating ball liquid level probe, a water inlet pump, the large air pump and the small air pump. The invention further discloses an intelligent distributed purification tank sewage treatment method. A proper program is selected to run according to the water inlet amount. According to the intelligent distributed purification tank sewage treatmentequipment and method, the adaptability is high and the operation is stable while the energy consumption is reduced.

The invention discloses a fan hub center constant-current hot-wire wind speed sensing system and method, and belongs to the technical field of wind power generation. A constant-current hot-wire probe is fixed on the front end surface of a fairing and is exposed out of the front end surface of the fairing; and the constant-current hot-wire probe is connected with a probe temperature sensor, the probe temperature sensor is connected with a temperature signal collector, the constant-current hot-wire probe and the temperature signal collector are respectively connected with current shunts, the current shunts are respectively connected with a constant-current power supply and a signal conversion controller, and the signal conversion controller is connected to an SCADA system. According to the fan hub center constant-current hot-wire wind speed sensing system and method, the design is reasonable, the total cost is low, and the installation method is simple; the advantages of small geometric dimension, small thermal inertia, high response frequency, continuous measurement, high spatial resolution, small interference on a measurement flow field and the like of a hot-wire anemograph are fully exerted, the wind speed can be accurately measured, and the interference of wind wheel rotation on wind speed measurement is effectively avoided; and meanwhile, measured data can be used for correcting and checking the traditional anemograph.

The invention relates to a novel doubly-fed converter with perfect and reliable low-voltage ride-through capability. The doubly-fed converter is rapidly switched by a fast grid-connected switch GK, a DC unloading unit DBU, a stator Crowbar, and an auxiliary power supply Unit APS, grid-side power module GSC, rotor-side power module RSC, grid-connected circuit breaker K1 and controller KZQ, etc. This doubly-fed converter is provided with A port, B port, C port and D port, where A port is connected to the doubly-fed wind turbine stator, B port is connected to the grid, C port is connected to the doubly-fed generator rotor, and D The port is connected to the power supply of the main control system of the doubly-fed generator set; the AC end of the stator crowbar is connected to the stator of the doubly-fed generator, and the DC unloading unit is connected to the common DC bus of GSC and RSC; the work of each part of the doubly-fed converter The state is controlled by the signal sent by the controller KZQ.

The invention belongs to the technical field of high-voltage power transmission and distribution devices, and relates to a novel self-driven modular high-voltage varistor. The varistor includes a sliding guide rail, a sliding block, a high-voltage current limiting resistor, a receiving plate and a freewheeling guide rail. The new self-driven modular high-voltage varistor is symmetrical on the left and right, the sliding guide is an inverted L-shaped metal guide, and the surface of the guide is polished and plated to enhance its conductivity and sliding contact. The two sliding guide rails are connected by a receiving plate, and the metal slider is placed on the receiving plate after surface treatment. The said receiving plate is made of insulating material and plays the role of fixing and supporting the metal slider. When a fault occurs, the present invention can limit the fault current rising rate and the fault current peak value in time without detection and control; in normal operation, it is close to zero loss and has no influence on the system operation.

The invention discloses a direct axis judgment method of a permanent magnet synchronous motor. A pulse vibration high frequency current injection method is adopted to construct a rotor closed loop system, and direct axis voltage response is obtained; the amplitudes of the direct axis voltage response when the injected current signal phases are Pi / 2 and 3 Pi / 2 are recorded; and the two amplitude values are compared, the direct axis positive direction is judged, and a compensation value after the direct axis positive direction judgment is obtained. According to the direct axis judgment method inthe invention, in the process of judging the direct axis positive direction, the injected current is always a sinusoidal high-frequency signal, and other forms of signals such as positive and negative pulses do not need to be injected, such that the estimation process is simplified; the operation of the motor is not influenced, the structure is simple, the reliability is high, the operation complexity is reduced, and the initial position estimation process is simplified.

The invention discloses a method for inspecting the guide height and pull-out value of a high-speed rail contact line based on an airborne laser radar. The method includes the following steps: using an unmanned aerial vehicle equipped with a laser radar to inspect along the upper side of the railway line to obtain original point cloud data of the line ; Preprocess the original point cloud data; segment and extract the processed original point cloud data to obtain the point cloud of the catenary system and the point cloud of the line plane; extract the track in the point cloud of the line plane; Segment the point cloud with the support part of the pillar; extract the contact line in the contact suspension point cloud; match the contact line with its corresponding track, reconstruct the measurement scene, and automatically measure the lead height and pull-out value of the contact line at each point. The present invention realizes high precision, high efficiency and wide range of contact line static parameter detection on railway sites, is almost unaffected by external lighting conditions, and can even work in dark environments, which will expand the detection time range and improve maintenance work arrangements. flexibility.

The invention belongs to the technical field of nuclear power station hydrogen cooling generator set stator cooling water treatment, and particularly relates to a movable resin bed external flushing device and a flushing method thereof; the movable resin bed external flushing device comprises a storage cylinder, a support platform, a stirring rod, a cylinder middle partition plate, a middle unloading port, a drain pipe, an overflow pipeline, an upper sampling pipeline and a dust cover; the storage cylinder is placed on the support platform, and the stirring rod is arranged in the storage cylinder; the upper part of the storage cylinder is provided with a dustproof cover, one side of the upper end of the outer wall of the storage cylinder is connected with the upper sampling pipeline, and the other side of the upper end of the outer wall of the storage cylinder is connected with the overflow pipeline; the middle unloading port is formed in the middle of the outer wall of the storage cylinder and connected with an unloading pipeline, and a middle unloading valve is arranged on the unloading pipeline.

The invention discloses a license plate recognition method and system based on an image retrieval method. The recognition principle is as follows: obtain a video stream; locate and track a target license plate contained in the video stream, and extract a number of target license plate images; Several target license plate images carry out eigenvalue extraction, obtain some target license plate eigenvalues; The described several target license plate eigenvalues ​​are combined, obtain target license plate eigenvalue group; The characteristic value of the license plate to be searched is compared with the target eigenvalue group , output the search result. The present invention compares and matches the eigenvalue of the license plate to be searched with the eigenvalue of the target license plate obtained by monitoring and other methods, thereby realizing the search for the license plate without specifically identifying the license plate number of the license plate being monitored, which can significantly improve the efficiency and efficiency of the license plate search. accuracy. At the same time, because there is no need to identify the license plate number, it can also accurately identify the fuzzy license plate acquired by monitoring.

The invention discloses a route switching method and device for a ring-shaped optical transmission network. The method includes: when the output voltage of the power supply of the monitored base station is lower than a predetermined voltage threshold, according to the monitored optical route that works normally, the base station is connected to the The two normally working optical routes connected to two adjacent base stations are switched to the direct connection of the two optical routes, so that once it is detected that the base station is about to be powered off, the base station can be withdrawn from the ring optical transmission network, and the base station will be connected with the base station The two adjacent base stations are directly connected, the processing process can be automatically executed, the processing process is fast and effective, and has almost no impact on the network operation, thereby avoiding the simultaneous existence of a base station in the ring optical transmission network in the prior art that cannot work, and Another power outage at the base station will lead to the decommissioning of the entire optical ring network. The solution is inefficient, time-consuming, and significantly affects the operation of the ring optical transmission network.