212results about How to "Address reliability" patented technology

The invention discloses a mechanical arm grabbing control method and system based on digital twinning, and relates to the technical field of industrial robot intelligent control, and the mechanical arm grabbing control method comprises the steps that target object data and grabbing scene data are collected, and a digital twinning model of a target object and a grabbing scene is constructed; dynamic changes of the target object and the grabbing scene are monitored in real time, the digital twin model is dynamically corrected, and a high-precision digital twin model is generated; based on a high-precision digital twinborn model, extracting characteristics of a target object, and identifying an optimal grabbing point; generating a grabbing strategy based on the optimal grabbing point and the high-precision digital twin model, and verifying the feasibility of the grabbing strategy; and according to a verification result, dynamically executing an intelligent grabbing strategy. According to the method, the grabbing precision and stability of the mechanical arm are improved by correcting the digital twin model in real time and recognizing the optimal grabbing point.

The invention discloses a solid state disk testing method and system, a storage medium and a program product, and relates to the field of computer storage testing, and the method comprises the following steps: dividing a storage space of a solid state disk to be tested into a plurality of physical areas; determining the number of read-write tests of the to-be-tested solid state disk within a preset duration at a preset temperature; performing read-write test operation on the plurality of physical areas in sequence within a preset duration to obtain read-write error rates respectively corresponding to the plurality of physical areas, the number of read-write times of the read-write test operation being the number of read-write test times; if the read-write error rates corresponding to the physical areas exceeding the preset number are higher than a preset error rate threshold value, determining that the to-be-tested solid state disk is unqualified; and if the read-write error rates corresponding to the physical areas lower than the preset number are lower than a preset error rate threshold, determining that the to-be-tested solid state disk is qualified. By implementing the method, the specific problem area in the solid state disk can be positioned and diagnosed more accurately, so that the quality evaluation standard and the maintenance efficiency of the whole solid state disk are improved.

The invention discloses a wind power master control system based on a safe and credible software and hardware platform, which belongs to the technical field of wind power generation and comprises a data acquisition module, a data analysis module, a monitoring result judgment module, an abnormal unit optimization control module and a data backup module. According to the invention, the data acquisition module acquires the operation monitoring parameters of the wind turbine generator in real time, and the operation monitoring parameters are processed by the data analysis module to obtain the operation monitoring evaluation value, so that the operation state of the wind turbine generator is accurately judged, and accurate monitoring and timely early warning of the wind turbine generator are realized; the problem that in the prior art, a wind power master control system is insufficient in safety performance and reliability is effectively solved, and the safe operation level and the fault handling capacity of a wind power plant are improved.

The invention discloses a direct-current corona discharge mode recognition method and system based on YOLOv8 and a CNN model, and relates to the technical field of power equipment monitoring. The invention aims to solve the technical problem that the corona discharge phenomenon of high-voltage direct-current electrical equipment is difficult to monitor in real time and accurately classify. According to the scheme, the method comprises the following steps: firstly, shooting a corona discharge visible light image by using a digital single lens reflex camera, and carrying out manual labeling and data enhancement processing; then detecting and positioning a corona discharge source by using a YOLOv8 model; inputting the positioned corona discharge area image into a deep convolutional neural network (CNN) for classification of discharge modes; finally, the output results of the CNN models are fused through integrated learning, and the classification accuracy is improved. According to the method, real-time monitoring and accurate classification of the corona discharge phenomenon of the high-voltage direct-current electrical equipment can be realized, a powerful guarantee is provided for safe operation of power equipment, the operation and maintenance efficiency is remarkably improved, and the equipment fault risk caused by corona discharge is reduced.

The invention discloses a Region-level remote disaster recovery method, system and device based on a Paas cloud platform and a medium, in the Paas cloud platform, a WAN optimization technology is adopted, and a data compression algorithm, an acceleration algorithm and a cache algorithm are adopted, so that the data transmission time delay and network congestion are reduced, and the data synchronization efficiency and speed are improved; a remote multi-activity technology is introduced, so that the main data center and the backup data center simultaneously provide services to the outside, high availability and disaster tolerance of services are ensured, the main data center is automatically switched to the backup data center when the main data center breaks down, and rapid fault switching is realized; a load balancing mechanism and a fault switching mechanism are adopted, the flow is automatically switched to the backup data center when the main data center breaks down, and rapid fault switching is achieved. By adopting the WAN optimization technology, the time and delay of cross-geographic-position data synchronization are reduced, and the reliability and real-time performance of data synchronization are ensured.

The invention relates to an energy management control method and system for an extended-range mine car, and belongs to the field of mining trucks. The method comprises a fixed-point working mode of the range extender, and comprises the following specific steps: acquiring vehicle driving required power; if the vehicle driving demand power is smaller than the vehicle driving power lower limit, the range extender requests the generated power to be 0; if the vehicle driving demand power is between the vehicle driving power lower limit and the vehicle driving power upper limit, the range extender request generated power is the first range extender generated power; if the vehicle driving demand power is larger than the vehicle driving power upper limit, the range extender request generated power is the second range extender generated power; the method is used for solving the problems that different working modes need to be judged and selected due to different working conditions in the vehicle running process, hardware such as a sensor and a chip with higher computing power are additionally added, cost is increased, and reliability is reduced.

The invention relates to the technical field of new energy regulation and control, and provides a photovoltaic energy storage system regulation and control method and system based on multiple time scales. The method comprises the steps that in a short time scale, if power grid frequency fluctuation exceeds a set threshold value, a photovoltaic energy storage system conducts regulation and control so that the power grid frequency can be stable; based on the meteorological data and the illumination intensity of the medium time scale, adopting an illumination intensity prediction model to predict the illumination intensity of the medium time scale in the future; based on the meteorological data, the illumination intensity and the power grid power-on data, predicting the power grid demand of the time scale in the future by adopting a power grid demand prediction model; if it is judged that the illumination intensity fluctuation range of the time scale in the future exceeds the key threshold value, the charging and discharging states of the photovoltaic energy storage system are adjusted in advance; and acquiring long-time-scale meteorological data, power grid load change and electricity price trend, solving by taking profit maximization as an objective function and a constraint condition, and outputting a solution for regulating and controlling charging and discharging of the photovoltaic energy storage system.

The invention discloses a multi-bus decoupling distributed embedded hardware rendering architecture, system and method, and relates to the technical field of ultra-high-definition video hardware processing, and the key points of the technical scheme are that the architecture comprises a multi-bus decoupling module which comprises a plurality of hardware buses which are physically isolated from one another, each hardware bus is an exclusive hardware transmission link bearing a single-type manufacturing task; the modular processing unit is an independent hardware board card and is integrated with an external signal input port, an upstream bus signal input port and a downstream bus signal output port; the plurality of modular processing units are cascaded in sequence through a hardware bus in the multi-bus decoupling module to form a distributed assembly line rendering link; when the modular processing units are newly added, the signal processing capability and the rendering synthesis capability are linearly improved along with the increase of the number of the modular processing units. According to the invention, the problem of performance bottleneck of the traditional architecture in processing 4K / 8K ultra-high-definition and multichannel rendering is fundamentally solved.

The invention belongs to the technical field of natural disaster monitoring and early warning, and particularly discloses a landslide deformation monitoring device which comprises monitoring piers, the monitoring piers are arranged on the two sides of a crack, a monitoring box is fixedly arranged on the upper side of one monitoring pier, and a rope end fastening mechanism is arranged on the upper side of the other monitoring pier. A winding disc, a displacement monitoring mechanism and a centrifugal driving anti-interference mechanism are arranged in the monitoring box, the winding disc is rotationally arranged on the side wall of the monitoring box in a clamped mode, the displacement monitoring mechanism is located on the rope outlet side of the winding disc, the centrifugal driving anti-interference mechanism and the winding disc are coaxially arranged, and the winding disc is connected with a tension pre-tightening mechanism on the outer side of the monitoring box. A solar power assembly is arranged on the upper side of the monitoring box. According to the invention, a pure mechanical structure is utilized to judge the real reason of the change of the monitoring value, the influence of external interference on the crack width monitoring result is effectively eliminated, so that false alarm is avoided, the requirement of frequently going to the site for troubleshooting is reduced, the installation is simple, convenient and rapid, complex operation is not needed, and the device can be rapidly deployed in various terrain environments.

The invention discloses a multi-channel circulating grouting-pipeline in-situ cleaning integrated plugging device and a using method thereof.The multi-channel circulating grouting-pipeline in-situ cleaning integrated plugging device comprises an initial grouting pipe, a later grouting pipe, a cleaning pipe, a first bag, a second bag and a third bag, and the first bag, the second bag and the third bag are sequentially installed on an extraction pipe at intervals from front to back; the initial grouting pipe penetrates through the first bag, the second bag and the third bag, the later grouting pipe and the cleaning pipe are next to each other and sequentially penetrate through the first bag and the second bag side by side from front to back, and a grouting-pipeline cleaning one-way valve located between the second bag and the third bag is arranged at the rear end opening of the later grouting pipe and the rear end opening of the cleaning pipe. The in-situ cleaning device is scientific in principle, simple in structure and convenient to operate, by means of in-situ cleaning of the grouting pipe after grouting in the later period, the next time of grouting and plugging of the gas extraction drill hole are smoother, and therefore the reliability and continuity of plugging of the drill hole in the gas extraction process are achieved.

The invention provides an integrated plate type metal-supported solid oxide fuel cell or electrolytic tank and a power supply, and relates to the technical field of fuel cells. The battery or the electrolytic tank comprises a metal supporting body, an insulating layer, an electrochemical reaction unit and a conductive piece. The metal support body has a first surface, a second surface and a peripheral surface which are hermetically connected. And a flow channel for reaction medium materials is arranged between the first surface and the second surface. And the metal support body is provided with a plurality of ventilating through hole areas communicated with the flow channel of the reaction medium material. An electrochemical reaction unit is arranged on at least one surface of the metal supporting body, an insulating layer is arranged between the metal supporting body and the electrochemical reaction unit, and the through holes of the ventilation through hole area penetrate through the insulating layer. The conductive part is used for connecting the electrochemical reaction unit. The problems that a solid oxide fuel cell is difficult to seal, slow in start and stop, poor in thermal shock resistance, low in mass power density, low in output voltage and the like are effectively solved, and the solid oxide fuel cell is particularly suitable for portable power supplies, aircrafts, other mobile carrier power supplies and other scenes.

The embodiment of the utility model provides a mainboard handle, a mainboard assembly and a server. The mainboard lifting handle comprises a main body part connected with a mainboard, the main body part is of an integrated frame structure, the main body part is provided with a channel allowing a cable to penetrate through and a lifting handle area allowing personnel to operate, and the lifting handle area is located on the side face of the channel. The server mainboard handle solves the problem that a server mainboard handle in the prior art is complex in structure.

The invention provides an industrial internet information model modeling optimization method based on natural language processing, and relates to the technical field of computers. The method comprises the following steps: inputting a preset data source and model prompt information into a preset natural language processing model, and extracting to obtain modeling elements; the model prompt information comprises first-stage prompt information and second-stage prompt information; dividing the modeling elements into a corresponding number of modeling element clusters based on the target cluster number; constructing an information model based on the modeling element cluster; the information model is used for indicating the relationship among the modeling elements; the information model comprises a tree structure layer or a combination of the tree structure layer and a net structure layer; wherein the tree structure layer comprises an object class layer corresponding to the information model, a cluster class layer corresponding to each modeling element cluster and a representative element layer corresponding to each modeling element cluster; the problem that an information model is poor in effect and reliability can be solved. And the effect and reliability of the information model are improved.

The invention provides a standard regulation management method, device and system based on vehicle models, and the method comprises the steps: determining a standard regulation list corresponding to a target vehicle model according to the mapping relation between the target vehicle model and the standard regulation; according to the type attribute information of the standard regulations in the standard regulation list and the identification information of whether the standard regulations are stored in the standard regulation list, the standard regulations which are not stored in the standard regulation list are correspondingly sent to an external standard regulation management module or an internal standard regulation management module; performing corresponding warehousing and full-process management according to the standard regulations which are not warehoused in the external standard regulation management module or the internal standard regulation management module; and outputting the standard regulations after full-process management in the standard regulation list corresponding to the target vehicle model. The reliability and practicability of the automobile standard regulations in the management process are effectively improved.

The invention relates to the technical field of computers, in particular to a visual color difference data level-to-level management method and device, equipment and a medium. The method comprises the following steps of: converting respective RGB (Red, Green and Blue) values of a plurality of peripheral adjacent colors of a standard color to calculate color differences between the peripheral adjacent colors and the standard color, and performing color difference grading on the peripheral adjacent colors according to the color differences, and after target color difference grades close to the color difference of the batch color and a target reference color sample with the minimum color difference value with the batch color in the target color difference grades are screened out from the multiple reference color samples corresponding to the different color difference grades, screen display is carried out, so that a user can carry out visual evaluation according to an output display result. The effect that any color is provided with a reference color sample of a full-color-difference grade is achieved, the purpose of digital color difference visualization is achieved, and the problems that in color difference management, visual inspection management is high in cost, and digital management is insufficient in reliability are solved.

The invention discloses a scoring method and device of a recognition engine, a storage medium and an electronic device, and relates to the technical field of smart home, and the method comprises the steps: inputting a target audio into a trained voice large model to obtain a first recognition text, and obtaining a second recognition text output by processing the target audio through a third-party text recognition engine; calculating a plurality of index parameters between a first phoneme sequence corresponding to the first recognition text and a second phoneme sequence corresponding to the second recognition text, the plurality of index parameters comprise at least one of the following parameters: similarity between different phoneme sequences, common phoneme proportion between different phoneme sequences, phoneme error rate between different phoneme sequences, and phoneme length matching degree between different phoneme sequences; summarizing the index parameters according to preset parameter weights to obtain a target score of the third-party text recognition engine for recognizing the target audio, the target score being used for indicating the quality of the recognition text output by the third-party text recognition engine.

The invention discloses a super-heavy-load petroleum and natural gas drilling machine, and belongs to the technical field of petroleum drilling machine devices. The structure comprises a base and a derrick arranged on the base, a winch is arranged on the base, a crown block and a liftable traveling system are arranged at the top of the derrick, the winch is connected with the crown block and the traveling system through a well drilling steel wire rope, and the traveling system is controlled to ascend and descend through the winch; according to the super-heavy-load petroleum and natural gas drilling machine, through the design of the winch and the brake device, the action process of the whole winch can be effectively controlled, the working condition requirements of whole lifting, tripping, drilling and the like can be further met, and then the working efficiency and reliability of the drilling machine are effectively improved; the installation and transportation efficiency of the winch is improved; and the maintenance workload is reduced.

The application belongs to the field of material grabbing devices of optical storage equipment, and more particularly to the field of optical disc taking and placing, and discloses an optical disc taking and placing device and method, which comprises a supporting cylinder, a through hole is formed in the bottom of the supporting cylinder, a shaft rod is fixed in the through hole, a permanent magnet claw arm is rotatably connected to the outer side of the shaft rod, the permanent magnet claw arm penetrates through the through hole and is connected with a hook block, a fixed ring is fixed to the bottom of the iron core, a hydraulic mechanism is fixed in the bottom of the supporting cylinder, the hydraulic mechanism penetrates through the fixed ring and is connected with the permanent magnet claw arm, a pressing and fixing mechanism is fixed to the bottom of the supporting cylinder, and the pressing and fixing mechanism is connected with the hydraulic mechanism through a first connecting pipeline. The optical disc taking and placing device controls the action of the three permanent magnet claw arms through the magnetic pole interaction of the permanent magnet and the electromagnet, has the advantages of no friction loss and high control precision compared with the traditional mechanical driving, and solves the reliability problem caused by mechanical wear in the prior art.

The invention relates to a buoyancy-driven telescopic device for a deepwater pool, which comprises a fixed truss serving as a basic support structure of the whole device; the guide mechanism is mounted in the fixed truss and used for limiting the sliding path of the buoyancy system and the movable truss in the fixed truss; the buoyancy system is mounted at the bottom of the movable truss and used for driving the movable truss to float and sink for a long distance; the movable truss is used as a telescopic part of the device, is nested with the fixed truss and is driven by a buoyancy system to realize telescopic motion; according to the device, long-distance floating and sinking movement of the movable truss is achieved through buoyancy changes, external electric power or hydraulic energy is not needed, the structure is compact and reasonable, operation is convenient, the buoyancy system is used as a driving mechanism, and external electric power or hydraulic energy is not needed; therefore, the problems of low deepwater environment adaptability and low long-term use reliability are solved, and meanwhile, the energy consumption and the maintenance cost are reduced.

The invention provides an automatic test system and method for a stop valve director, and the system comprises a human-computer interaction interface module which is used for the input of a control instruction and the monitoring of an operation state; the PLC control module is connected with the human-computer interaction interface module, and the PLC control module adopts a PLC as a logic control program, is responsible for control logic processing of the whole system and outputs a control instruction; the gas circuit control module is used for converting the control instruction sent by the PLC control module into an electromagnetic valve action and driving a corresponding execution mechanism; and the mechanical execution module is used for converting the gas pressure transmitted by the gas path control module into a pressing action of a mechanical fixing device and driving an execution mechanism to complete operation on various buttons of the stop valve director. The automatic test system and method provided by the invention realize one-key full automation and thoroughly solve the problem of long-time fatigue work of personnel test, and meanwhile, the reliability problem of manual recording is solved by automatically recording the test times.

A kind of airplane brake system air-ground signal control method, through air-ground signal control circuit, determine magnetic latching relay, determine airplane ground signal, determine airplane air signal and determine airplane air-ground control logic realize the control of airplane brake system air-ground signal, the original airplane brake system electrical control system landing gear system landing switch and landing gear is retracted to position switch respectively increase magnetic latching relay in this application, the ground state of airplane is determined by landing gear system landing switch and magnetic latching relay, the air state of airplane is determined by landing gear is retracted to position switch and magnetic latching relay, completely solve the problem of unstable and unreliable airplane air / ground signal due to landing gear system landing switch simultaneously determining the air / ground state of airplane during airplane landing phase due to landing gear system landing switch repeatedly disconnecting and connecting, improve the safety of airplane brake system.

The present invention provides a motor and a control method thereof, wherein the motor includes: a rectifier circuit, a power decoupling circuit and an inverter circuit; wherein the rectifier circuit, the power decoupling circuit and the inverter circuit are connected in parallel to the motor; the rectifier circuit is connected to the input end of the motor, and the inverter circuit is connected to the output end of the motor; the rectifier circuit is used to convert the alternating current input to the motor into direct current, and input the direct current into the power decoupling circuit; the power decoupling circuit is used to store electric energy according to the direct current, and provide electric energy to the motor; the inverter circuit is used to convert the direct current into alternating current and output it through the output end. Through the present invention, the problem of the related art that the electrolytic capacitor is connected in parallel on the DC side as an energy storage and buffer unit, resulting in a short service life and low reliability of the entire control system is solved.

The invention discloses a hot-coated high-barrier heavy-wrapping roll film and a preparation method thereof. Belongs to the technical field of packaging materials. The roll film sequentially comprises an outer-layer base material film, a middle barrier layer and an inner-layer heat sealing film. The middle barrier layer is formed by drying and curing nano-composite barrier liquid coated on the inner surface of the outer-layer base material film; the nano-composite barrier liquid comprises polyvinyl alcohol, a surface-modified inorganic nano-material dispersion liquid, a polymer emulsion, a cross-linking agent and a wetting agent. After being preheated, the barrier liquid is coated by micro gravure, is dried through three stages of rapid shaping, deep crosslinking and high-temperature densification in sequence, and is finally compounded with an inner-layer heat-sealing film in a solvent-free manner. Through precise coupling of a synergistic effect among specific components and a multi-stage drying process, the roll film has excellent initial oxygen barrier property, water vapor barrier property, excellent stability in a high-temperature and high-humidity environment and high barrier stability after simulating a dynamic mechanical load of heavy packaging and transportation.

This invention discloses an anti-theft alarm fastener. By integrating a position detection module, a control module, and an alarm module into the male and female buckles of an existing magnetic fastener, it achieves real-time monitoring of the fastener's connection status and automatic alarm functions upon unauthorized separation. The control module, with its function selection button, allows the fastener to flexibly switch between at least two operating modes: alarm function off or on. This greatly improves the product's practicality and applicability, meeting diverse user needs in different situations. The position detection module uses a magnetic trigger and a Hall sensor element to form a non-contact position detection module, avoiding reliability issues caused by contact oxidation, wear, or poor contact in traditional mechanical switches. Furthermore, the mating structure of the mounting groove and positioning recess improves the accuracy and consistency of detection, effectively avoiding misjudgments or missed alarms due to positional misalignment.

The invention discloses a battery string, a photovoltaic module and a preparation method of the battery string, and relates to the technical field of photovoltaics. The battery string comprises a plurality of battery pieces, and transparent conductive films are arranged on the front surfaces and the back surfaces of the battery pieces; the first metal wire mesh is laid on the front surface of each battery piece and is electrically connected with the transparent conductive thin film on the front surface of the battery piece; the second metal wire mesh is laid on the back surface of each battery piece and is electrically connected with the back surface of the battery piece; and a plurality of bus bars. For every two adjacent battery pieces, the first metal wire mesh on one battery piece and the second metal wire mesh on the other adjacent battery piece are electrically connected with the same bus bar so as to connect a plurality of battery pieces in series. The metal wire mesh in the battery string is not easy to bend, small in stress and high in reliability.

The invention discloses a double-circulation refrigerating system, a control method, a control device and a storage medium. The double-circulation refrigerating system comprises a compressor, a refrigerating system and a refrigerating system, the condenser, the fluorine pump, the throttling device and the evaporator are connected in sequence; the fluorine pump bypass flow path is connected with the fluorine pump in parallel; the bypass valve is used for controlling the on-off of the fluorine pump bypass flow path; the control valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, and the first valve port, the second valve port, the third valve port and the fourth valve port are connected with the air suction port, the exhaust port, an inlet of the condenser and an outlet of the evaporator in a one-to-one correspondence mode; the control valve has a first working state and a second working state, in the first working state, the first valve port is communicated with the fourth valve port, and the second valve port is communicated with the third valve port; and in the second working state, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port. The double-circulation refrigerating system is additionally provided with the control valve, so that the liquid accumulation risk of the compressor during variable-working-condition operation of the fluorine pump is avoided.

The application provides an overhead transmission line strain clamp airborne X-ray flaw detection communication control system, which comprises an X-ray flaw detection imaging device and a long-distance communication device, wherein the X-ray flaw detection imaging device comprises a ground control terminal and an X-ray machine and an imaging plate carried on an unmanned aerial vehicle; the ground control terminal is in communication connection with the X-ray machine and the imaging plate through the long-distance communication device, is used for acquiring real-time state parameters of the X-ray machine and the imaging plate, and generates an X-ray exposure instruction according to the real-time state parameters of the X-ray machine and environmental parameters; generates an imaging plate acquisition instruction according to the real-time state parameters of the imaging plate and the network delay between the ground terminal and the X-ray machine, realizes real-time optimization imaging of the X-ray machine under complex working conditions, realizes identification of a strain clamp defect type and a defect grade based on special defect identification rules of the strain clamp and X-ray images, and improves reliability and safety in an airborne X-ray flaw detection operation process.

A semiconductor package according to an embodiment includes: a first substrate including a first pad and a second pad; a first connection unit disposed on the first pad of the first substrate; a second substrate coupled to the first connection unit; a second connection unit disposed on the second pad of the first substrate; an element mounted on the second connection unit; and a molding layer disposed on the first substrate to mold the element. The element includes one of a capacitor and an inductor, and the second substrate includes a patterned layer functionally different from the element among the capacitor and the inductor.

The invention provides a heat supply system and method for coupling a coal-fired boiler with fused salt heat storage, and relates to the technical field of coal chemical industry heat supply. The heat supply system comprises a hot molten salt tank used for storing hot molten salt; the cold molten salt tank is used for storing cold molten salt; the fused salt heater is used for converting the electric energy into heat energy, heating the cold fused salt into hot fused salt by using the heat energy, and storing the hot fused salt into the hot fused salt tank; the cold fused salt exchanges heat with steam sent out by the coal-fired boiler in the fused salt heat exchanger, and the cold fused salt becomes hot fused salt after absorbing heat of the steam and enters the hot fused salt tank; and the auxiliary generating device comprises a steam generator, demineralized water is heated through heat energy of the hot molten salt to generate auxiliary steam to be supplied to a steam main pipe of the coal-fired boiler, and the hot molten salt becomes cold molten salt through heat loss and enters the cold molten salt tank. According to the heat supply system and the heat supply method, the problem that reliable steam heat supply cannot be provided in time when sudden accidents such as sudden fire extinguishing of a boiler or sudden tripping of chemical equipment occur in a coal chemical system in the prior art is solved.

A circuit board according to an embodiment includes: a first metal layer; and a second metal layer disposed on the first metal layer, in which the first metal layer includes an oxide layer formed by oxidizing a region of a predetermined depth from a lower surface of the first metal layer, the first metal layer and the second metal layer include a plurality of electrode patterns disposed on the oxide layer and spaced apart from each other, the oxide layer insulates the plurality of electrode patterns from each other.