186results about How to "With technical effect" patented technology

The invention discloses a power battery fire extinguishing device, a power battery, and a fire extinguishing method of the power battery. The power battery fire extinguishing device comprises a control system, and a lithium battery fire extinguisher, a gas cooling fire extinguisher, a temperature sensor and a smoke sensor electrically connected with the control system. The temperature sensor and the smoke sensor are installed in a tank body of the power battery, and are used for acquiring a temperature signal and a smoke signal in the tank body and transmitting the signals to the control system; the lithium battery fire extinguisher and the gas cooling fire extinguisher are installed on the tank body of the power battery; and the control system is used for controlling the lithium battery fire extinguisher or the gas cooling fire extinguisher according to the temperature signal and the smoke signal. According to the power battery fire extinguishing device, the power battery, and the fire extinguishing method of the power battery, the misjudgment of a fire accident cannot occur easily, the power battery cannot be damaged easily, and the service life of the power supply can be prolonged.

The invention provides a communication self-detection method and system, an intelligent cabinet, a communication detection method and system, and a server. The communication self-detection method andsystem are applied to the intelligent cabinet comprising a communication module, and the communication detection method and system are applied to the server that is cooperatively used with the intelligent cabinet. The communication self-detection method comprises the following steps: S102, judging whether a heartbeat signal periodically sent by the server is received according to a heartbeat protocol, and if yes, skipping to S104; if not, skipping to S108; S104, starting a new round of timing; S106, feeding back the heartbeat signal to the server; S108, maintaining the current timing, and obtaining a waiting time; S110, judging whether the waiting time reaches a first preset time, and if yes, skipping to S112; and S112, restarting the communication module. By adoption of the communicationself-detection method provided by the invention, the communication stability of the system under long-term operation is ensured, the operation and maintenance costs are reduced, and the operation state of the intelligent cabinet can be monitored in real time.

The invention provides a timing control method and device for an air conditioner and the air conditioner. The timing control method for the air conditioner comprises the following steps: a selection instruction of a timing mode is received, and the timing mode is started; timing time is set, and an operation parameter of the air conditioner is set; timekeeping operation is started, and whether thetimekeeping time reaches the timing time or not is judged; and when the timekeeping time reaches the timing time, a control command corresponding to an operation parameter is sent to the air conditioner, and the air conditioner is controlled to run according to the operation parameter. According to the technical scheme, on one hand, the various timing modes are provided, a user can select according to requirements of the user, and the user experience is improved; and on the other hand, the timing function setting timing time calculating are completed by a controller, and only when timing andtimekeeping are completed, the parameter command needed to be operated is sent to the air conditioner, the timing error of the controller and the air conditioner is avoided, and the customer complaintprobability is reduced.

The invention provides an order management method and system, a cooking control method and system, and a central control cooking system. The order management method for a user terminal comprises: selecting an operation terminal by an ordering platform to carry out cargo ordering and generating corresponding cargo ordering information; generating order information corresponding to the cargo ordering information; generating a payment interface for payment by the user; determining whether payment completion information is received; if so, sending the order information to the operation terminal toenable the operation terminal to control cooking equipment to cook the cargo in the order information based on the order information. According to the order management method, the user terminal, theoperation terminal, and the cooking equipment are combined. The order information generated by the user terminal is directly transmitted to the operation terminal, so that the operation terminal automatically controls the cooking equipment to cook the corresponding cargo according to the order information; no manual setting of cooking parameters of the cooking equipment is needed; the cooking efficiency and accuracy are improved; and the labor costs are lowered.

The invention discloses a method for continuously preparing graphene and belongs to the technical field of preparation of the graphene. The method for continuously preparing the graphene comprises thesteps: a graphite electrode serves as a sacrificial anode, a sheet metal or graphite electrode serves as a cathode, the sacrificial anode and the cathode are placed into an electrolyte of an oblique-placed electrolysis tank, and a DC regulated power supply is applied for electrochemical reaction stripping so as to form the graphene; during electrochemical reaction, the graphene containing electrolyte flows in a solid-liquid separator located below the electrolysis tank under the action of own gravity and is subjected to solid-liquid separation so as to obtain the graphene and the electrolyte;and the separated electrolyte is recycled and flows back into the electrolysis tank for the electrochemical reaction through being driven by a peristaltic pump. According to the method, the effect ofrapidly recycling the electrolyte is achieved by adopting a liquid flow recycling technology, the continuous production of the graphene is achieved, the continuous stripping production cycle is short, the product structure is excellent, and thus, the method is applicable to large-batch rapid continuous production. Meanwhile, no waste gas is generated, no strong acid is used, the electrolyte can be recycled and reused, and thus, the method has an obvious environment-friendly value.

The invention relates to a manufacturing method of a septum device, belonging to the technical field of pressure measuring. The method comprises the following steps: a processed round metal plain film is fixedly connected with a processed septum junctor, an upper septum junctor and a lower septum junctor are connected in a sealing way, the round metal plain film is punched by pressure medium and is jointed with a function surface on the septum junctor under the pressure action of the pressure medium to generate tension set; a function surface completely coinciding with the function surface on the septum junctor is formed on the round metal plain film which is shaped as a metal film with waviness; the metal film is provided with a function surface completely coinciding with the function surface on the septum junctor, the junctor has accurate positioning and accordant die space and especially plays the role of overvoltage protection, so the metal film cannot be damaged in overvoltage, thereby the pressure propagation precision of the septum device is enhanced. The invention also provides a septum device and a septum pressure gauge.

The invention relates to the technical field of air conditioners and provides an air conditioner and a self-cleaning control method for an fan and air duct thereof to solve the problems that the and air duct of an existing air conditioner are high in dust removal cost and inconvenient to us. The control method comprises the steps: controlling the fan to run at a first rotating speed for a first set duration to form a water film on the surface; controlling the fan to operate reversely at a second rotating speed and then operate at a third rotating speed, and circularly executing the step at least once, so that dust attached to the fan and the air flue can be thrown out and attached to the water film; and controlling the fan to operate for a third set duration at a fourth rotating speed, sothat flowing condensate water can be formed on the surface of the heat exchanger, and dust is discharged by means of the flowing condensate water. According to the control method provided by the invention, deep self-cleaning of dust in fans and air ducts of the indoor unit and the outdoor unit can be achieved, a disassembling and assembling machine is not needed, a special cleaning tool does not need to be arranged, and the dust removal cost can be greatly reduced.

The invention provides a refrigerant amount judgment method and system, computer equipment and a computer readable storage medium. The refrigerant amount judgment method is used for an air conditioner. The air conditioner comprises an indoor unit and an outdoor unit. The air conditioner is filled with a refrigerant. The refrigerant amount judgment method comprises the steps that exhaust parametersof the outdoor unit are detected in a refrigeration mode, and the relation between the exhaust parameters and preset exhaust parameters is judged; and according to the judgment result, whether the refrigerant amount in the air conditioner reaches the standard refrigerant amount or not is judged. According to the provided refrigerant amount judgment method, whether the refrigerant amount in the air conditioner reaches the standard refrigerant amount or not can be determined by detecting the exhaust performance parameters of the outdoor unit in the refrigeration mode and comparing the detectedexhaust parameters with the preset exhaust parameters.

The invention belongs to the technical field of remote sensing image processing, and discloses a multi-scale nested remote sensing image change detection method and system and a computer terminal.The multi-scale nested remote sensing image change detection method comprises the steps that a public data set is selected, and the data set is preprocessed; constructing a network model based on an ECA attention mechanism to extract single-time-phase image features; designing and constructing a network model based on multi-scale double superposition; and selecting a training sample to train the network model and selecting a test set to test the network model. According to the method, change detection is carried out on a remote sensing image by using a feature pyramid, a twin network and an attention mechanism, the problem of class imbalance is solved by weighting two loss functions, and the influence of extraction of network fusion features and class imbalance on a detection result is enhanced by considering multi-scale superposition. The running speed is increased to a great extent; and meanwhile, the resource consumption is reduced.

The invention relates to the technical field of air conditioners and aims to solve the problem that existing air conditioners have low utilization rate of the cooling capacity in condensate water generated by indoor units, and for this reason, the invention provides an air conditioner indoor unit and an air conditioner. The indoor unit comprises an air supply passage and an evaporator arranged inside the air supply passage and further comprises a water receiving tray, a water pump and a condensate water pipeline, wherein the water receiving tray is arranged below the evaporator and used for receiving the condensate water flowing out of the evaporator; the water pump is used for pumping and conveying the condensate water inside the water receiving tray; and an inlet of the condensate waterpipeline is connected to a water outlet of the water pump, the condensate water pipeline comprises a heat exchanging pipe segment, and the heat exchanging pipe segment is arranged inside the air supply passage to perform heat exchanging with air inside the air supply passage conveniently. By means of the air conditioner indoor unit and the air conditioner, the cooling capacity in the condensate water generated by the indoor unit can be utilized sufficiently, the air conditioning refrigeration efficiency is improved, cooling capacity waste is avoided, special equipment of a long distance transportation pipeline is not needed, and the air conditioner indoor unit and the air conditioner are low in cost and good in effect.

The invention provides a refrigerant amount judgment method and system, computer equipment and a computer readable storage medium. The refrigerant amount judgment method is used for an air conditioner. The air conditioner comprises an indoor unit and an outdoor unit. The air conditioner is filled with a refrigerant. The refrigerant amount judgment method comprises the steps that exhaust parametersof the outdoor unit are detected in a heating mode, and the relation between the exhaust parameters and preset exhaust parameters is judged; and according to the judgment result, whether the refrigerant amount in the air conditioner reaches the standard refrigerant amount or not is judged. According to the provided refrigerant amount judgment method, whether the refrigerant amount in the air conditioner reaches the standard refrigerant amount or not can be determined by detecting the exhaust performance parameters of the outdoor unit in the heating mode and comparing the detected exhaust parameters with the preset exhaust parameters.

The invention belongs to the technical field of air conditioners, aims to solve the problem that a user feels uncomfortable when chemical products such as a disinfectant are used for sterilizing a room at present, and provides a sterilization control method of a multi-split air conditioner and the multi-split air conditioner. The multi-split air conditioner comprises a plurality of indoor units. The sterilization control method comprises the steps of acquiring a sterilization instruction of the target indoor unit; acquiring a current operation mode of the multi-split air conditioner; and enabling the multi-split air conditioner to execute a corresponding sterilization mode according to the sterilization instruction of the target indoor unit and the current operation mode of the multi-splitair conditioner so as to enable the target indoor unit to sterilize the indoor space. In the heating operation of the multi-split air conditioner, hot air is discharged from the target indoor unit, indoor high-temperature disinfection is carried out, and compared with chemical products such as disinfectant, the method is healthier and has better user experience.

The invention discloses a shock-resistance segmented wind power blade and an assembly method thereof. The blade comprises at least two blade sections; a connecting device is connected between the blade sections, and includes two connecting frames; the connecting end surfaces of the connecting frames and the blade sections are matched in shape; first mounting holes are formed in the connecting frames; first bolts for tightly connecting with the blade sections are arranged in the first mounting holes; multiple hinge pieces for buffering are connected between two connecting frames; the rotating direction of all the hinge pieces is consistent with the stress direction of the blade sections; and limiting pieces for limiting swing of the blade sections are connected between the two connecting frames. The method comprises the steps of: (S1) manufacturing and transportation; (S2) installation; and (S3) building of pneumatic shape of the blade. The shock-resistance segmented wind power blade has the advantages of convenience for assembly and disassembly, high connecting strength and high reliability.

The invention belongs to the technical field of multi-view geometry under computer vision, and discloses a multi-camera calibration method in a large scene, an information processing terminal and a storage medium, and the method comprises the steps: carrying out the ambiguity matching filtering of multiple cameras in the large scene calibration through employing a scene clustering algorithm and an abnormal track removal algorithm; weak texture information enhancement is carried out on the ambiguous matched filtering image by using different fusion modes; and performing coordinate system registration on the image after weak texture information enhancement by using an ICP registration algorithm in combination with a phase mechanism type registration algorithm. According to the method, the adaptive capacity of the algorithm to texture similarity and texture sparseness in a large scene is improved. And the calibration precision is greatly improved. And high-precision multi-camera pose calibration in a large scene can be realized. According to the method, plane modeling and sphere center coordinate solving are carried out on the layout, and a conversion matrix is obtained. The above two modes complement each other, and the usability of the coordinate system registration algorithm is enhanced.

The invention provides an oval inner pot, an electric pressure cooker and a combination method of a pot edge of the inner pot. The oval inner pot comprises a pot body and a pot edge reinforcing plate,wherein the pot body comprises the pot edge, the cross section of the pot body is oval, the pot edge is positioned at the open end of the pot body, and the pot edge extends outwards along the radialdirection of the pot body; the pot edge reinforcing plate is heated to be laminated to the bottom of the pot edge. For the oval inner pot provided by the invention, the pot edge reinforcing plate is designed at the pot edge, so that the thickness of the pot edge is reinforced locally, meanwhile, the interface between the two layers is in a comprehensive metallurgical bonding state formed through heating lamination, so that the combined layer interface has the characteristics of firmness, high tensile strength and good extension property, the problems that a short shaft becomes long, a long shaft becomes short, and the deformation tends to be round during the process that the oval inner pot bears an inside pressure intensity are solved, the oval inner pot can maintain the stability of integral size deformation when bearing load, and good rigidity is achieved; and meanwhile, a plate material becomes thin through the structure, the weight of the oval inner pot is reduced, and the effect of reducing the cost is achieved.

The invention provides a cooking utensil control method and device, and a cooking utensil. The control method comprises steps that after the cooking utensil is electrified to operate, environment parameters of the cooking utensil detected by a sensor are acquired according to preset frequency; values of the acquired environment parameters are acquired, an on-off plan of a relay is determined according to the parameter values to control state change of the relay according to the on-off plan; when the relay starts operation according to the on-off plan, the on-off plan is not updated, timing isfurther carried out, after the operation period is over, the on-off plan is updated according to the parameter values; the on-off plan at least comprises the on-off duty ratio information and the period information of the relay during the subsequent operation period. The control method is advantaged in that locking of a relay control module and fine tuning control on the locking period and a relayon-off ratio in the operation process are realized, precise control in the product operation process is guaranteed, and reduction of service life of products caused by thermal agitation is avoided.

The invention relates to the technical field of air conditioners, solves the problem that an existing swing blade transmission mechanism is complicated in structure and the swinging of swing blades islimited, and provides a wind guiding assembly for an indoor unit of an air conditioner and the indoor unit of the air conditioner. The wind guide assembly comprises a plurality of swing blades, a driving rod and a driving device, wherein the swing blades comprise blade parts and shaft parts; the shaft parts are connected to a fixed structure of the indoor unit in a pivoting manner; worm gear teeth are arranged on the shaft parts; the driving rod comprises a plurality of worm sections capable of being matched with the worm gear teeth; and the driving device is connected with the driving rod, and is used for driving the driving rod to rotate to drive the swing blades to rotate relative to the fixed structure. According to the wind guiding assembly, the swing blades are driven by a worm andgear structure, the limitation of a parallel four-link structure to the swinging angles of the swing blades is broken through, 360-degree rotation of the swing blades is realized, the wind guiding assembly is compact in structure and high in driving efficiency, the flexibility of the swing blades is higher, and the problem of a poor wind supply effect of the air conditioner is effectively solved.

The invention belongs to the technical field of underwater target detection, and discloses a lightweight underwater target detection method and system, a medium, equipment and a terminal. A CSPDarknet18 is used as a backbone network to preliminarily extract features; extracting image features of different levels and scales by using a Dense strategy; an AFF module is added between the backbone feature extraction network and the FPN structure to realize cross-channel information interaction; constructing FPN and PANet networks, and extracting features with semantic information and position information at the same time; the enhanced feature extraction network is reconstructed by using depth-divisible convolution instead of common convolution, so that the number of parameters is reduced. The method is mainly used for positioning and identifying images of sea cucumbers, scallops, sea urchins and starfishes. Experimental results show that the mAP of the method reaches 78.18% on a 2020 URPC underwater target detection data set, the model parameter size is 37.22 M, the processing speeds of the video data collected on site in the sea area of the islands are 10.95 FPS and 28.05 FPS respectively, and good effects are achieved in the aspects of accuracy and speed.

The invention relates to the technical field of tobacco drying, in particular to a tobacco dryer, an operation control method and system thereof and a readable storage medium, and aims to solve the problem that a compressor of an existing tobacco dryer is frequently started and stopped in the moisture removal process. Therefore, an operation control method of the tobacco dryer is provided, and the method comprises the steps that under the condition that the tobacco dryer operates in a temperature rising and humidity discharging stage, operation parameters of a drying system are adjusted, and temperature rising operation is conducted in the mode that the heat supply amount is reduced, wherein the operation parameters comprise operation parameters related to the compressor. According to the operation control method of the tobacco dryer, the temperature rise time is prolonged by reducing the heat supply amount, so that the starting and stopping frequency of the compressor is reduced, and the adverse effect caused by frequent starting and stopping of the compressor is relieved.

The invention provides a baking tray assembly and a cooking electric appliance with a baking function, and relates to the technical field of food baking equipment. The baking tray assembly comprises a rotating part, a driving device and a baking tray; the rotating piece is arranged below the baking tray; the rotating piece is provided with a first tooth piece, the bottom of the baking tray is provided with a plurality of second tooth pieces, the second tooth pieces are distributed in a circular ring shape, and the first tooth piece is meshed with the second tooth pieces; and the driving device is used for driving the rotating part to rotate. By means of the baking tray assembly, the technical problems that when biscuits, pizza and other foods with flat appearances are baked, a driving structure for driving a baking tray to rotate in an existing rotatable baking tray structure can affect the flowing direction of hot air in an oven, metal chippings can fall onto the baking tray after long-time use, and the body health of a user is affected are solved; and the technical effect that the food cooking uniformity is improved on the premise that cooking is not affected is achieved.

The invention belongs to the technical field of power distribution network distributed voltage control, and discloses a power grid distributed voltage control distributed power supply optimization system. The power grid distributed voltage control distributed power supply optimization system comprises a data acquisition module, a user power consumption demand prediction module, a central control module, a distributed power supply access sensing module, a power distribution network load flow calculation module, a network loss determination module, a voltage stability analysis module and a distributed power supply acceptance capability calculation module. An electricity optimization control model building module; and a power supply optimization module. The method does not need a large amount of communication data, is simple and convenient in calculation, does not involve complex mathematical calculation, does not need the load distribution condition of a distribution network system, is high in calculation result precision, and can maintain the calculation result to be slightly greater than an actually accessed voltage value. A consistent optimistic evaluation result can be provided for the influence of the access of the distributed power supply controlled by the power grid on the voltage of the power distribution network, and the method has relatively high engineering practical value.

The invention discloses a scaphoid surgery screw-setting and positioning device and a scaphoid surgery screw-setting and positioning method. The scaphoid surgery screw-setting and positioning device comprises a hand fixing support and a screw-setting and positioning support; the screw-setting and positioning support includes an L-shaped rotating rod, a vertical rod of the L-shaped rotating rod ismounted on the hand fixing support, a transverse rod of the L-shaped rotating rod is sleeved with a slider that may rotate and traverse along the transverse rod, a lifting rod penetrates the slider, the bottom of the lifting rod is provided with a knob, and the knob is fitted with a screw-setting guide tube. The scaphoid surgery screw-setting and positioning method comprises the steps of S1, fixing a hand; S2, scanning; S3, adjusting and positioning; S4, fixing and removing. The scaphoid surgery screw-setting and positioning device and the scaphoid surgery screw-setting and positioning methodhave the advantages that the structure is simple and reliable, the operation is convenient, the cost is low, and scaphoid screw setting precision and efficiency can be greatly improved.

The invention belongs to the technical field of passwords, and discloses a method and system for achieving a soft cipher module, a storage medium and a terminal.The method for achieving the soft cipher module comprises the steps that entropy source management and random number generation are conducted through a random number generation unit; the key management unit is used for generating a key pair, generating a KEK based on a PIN code derivation function KDF, and performing secure storage of a working key and other CSPs and MAC verification of a PSP; the SSL communication unit is used for establishing an SSL secure channel with a security service platform and acquiring various working keys from the security service platform; and the password service unit is used for providing the services of password data encryption and decryption, MAC calculation, signature verification and entity identification. Aiming at two core problems faced by a soft cipher module, the invention provides a method for realizing the soft cipher module and an SDK (Software Development Kit), and particularly relates to selection of a random number entropy source, generation of random numbers, secure storage of secret keys, cipher service and the like.

The invention belongs to the technical field of crop detection, and discloses a seed variety quality detection method and system based on hyperspectrum, and the method comprises the steps: extracting an average spectrum of a sensitive region, and constructing a grain variety prediction model based on a convolutional neural network through different spectrum features; and meanwhile, grain seed forms and surface texture information are combined to assist spectral data for joint discrimination, and rapid nondestructive detection is performed on grain seeds by using a hyperspectral imaging method. According to the invention, image features and spectral features are simultaneously obtained based on the hyperspectral image, and the form and surface texture information of the grain seeds are combined to assist spectral data for joint discrimination, so that the accuracy of grain seed identification is improved; and multiple preprocessing methods are selected to improve the accuracy and stability of the detection model. The nondestructive component detection of the grain seeds is realized based on the spectrum-component correlation model.

The invention relates to the technical field of air conditioners and provides an air conditioner and a self-cleaning control method for an fan and air duct thereof to solve the problems that the and air duct of an existing air conditioner are high in dust removal cost and inconvenient to use. The control method comprises the steps: starting a refrigeration mode, controlling a first fan to run at afirst rotating speed for a first set duration, and forming a first water film on the surface of an evaporator; controlling the first fan to reversely run for a second set duration at a second rotating speed, so that dust attached to the fan and the air duct can be thrown out and attached to the first water film; controlling the first fan to operate for a third set duration at a third rotating speed, so that flowing condensate water can be formed on the surface of the evaporator, and dust is discharged by virtue of the flowing condensate water, wherein the second rotating speed is greater thanthe first rotating speed and the third rotating speed. According to the control method provided by the invention, the automatic cleaning of dust in the fan and the air duct of the indoor unit can berealized, a disassembling and assembling machine is not needed, a special cleaning tool is not needed, and the dust cleaning cost can be greatly reduced.

The invention belongs to the technical field of heart surgery pericardium drainage, and discloses a heart surgery pericardium effusion drainage method and system. The pericardial effusion drainage system for the cardiac surgery department comprises a case data acquisition module, a data preprocessing module, a data transmission module, a central control module, a preoperative evaluation module, a positioning and fixing module, a movable puncture module, a pericardial drainage module, a physical sign monitoring module, a drainage speed monitoring module, a medicine delivery module, a data storage module and an update display module. The pericardial effusion drainage system for the cardiac surgery department is simple in structure, convenient to use, time-saving and labor-saving, cardiac tamponade can be quickly, safely and effectively relieved, pain of a patient is reduced, flexible positioning can be achieved, puncture accuracy is guaranteed, effusion is completely removed, the effect of a pericardial effusion drainage operation for the cardiac surgery department is effectively improved, and the cardiac surgery department is worthy of popularization. And the workload of medical staff is greatly reduced.

The invention belongs to the technical field of unsealing of electronic components, and discloses an unsealing method of a plastic package copper bonding wire semiconductor device, which comprises the following steps: positioning the position of a chip of the device under X-ray, identifying the type of a bonding wire, and determining an unsealing scheme and an etching area; thinning a plastic package material of the device through laser; preparing a mixed solution of concentrated sulfuric acid, concentrated nitric acid and benzotriazole, and standing; wrapping the device by tinfoil, and stripping until an area to be unsealed is exposed; the preheated heating furnace is used for heating the prepared solution; dropwise taking the heated mixed solution through a dropper, and dropwise adding the mixed solution to a to-be-unsealed area of the device; when the bonding wires of the chip and the device are not completely exposed, continuously dripping the heated mixed solution to an unsealed area of the device until the bonding wires of the chip and the device are completely exposed; and carrying out ultrasonic cleaning on the unsealed device. The method is simple to operate, low in equipment requirement and high in test efficiency.

The invention belongs to the technical field of meteorological early warning methods, and discloses a method for forecasting growth and hail reduction stages of hail embryos in a hail violence process under complex terrains, which comprises the following steps of: acquiring related data, and performing quality preprocessing on the acquired data; performing aqueous substance particle identification on the preprocessed data by adopting a fuzzy logic particle phase state identification algorithm to obtain the number of key particles, the change rate along with time and the change rate ratio along with time, and finally obtaining a hail embryo stage prediction index of the key particles; and judging the stage of the hail embryo according to the hail embryo stage prediction index, and issuing corresponding hail storm early warning. According to the hail embryo stage prediction index, the stage where the hail embryo is located can be analyzed from the micro-physical process, whether the hail embryo is in the development and growth stage or the hail generation stage can be judged, and early warning is provided for hail violence under complex terrains.

The invention provides a direct current motor, a control method of the direct current motor and cooking utensil, and relates to the technical field of the cooking utensil. The direct current motor is used for being installed in an inner container of the cooking utensil. The direct current motor comprises a driving board including a VDC terminal for controlling the positive electrode of a power supply, a GND terminal for controlling a ground wire, an FG terminal for controlling a feedback signal and a PWM terminal for controlling the rotating speed and the rotating direction. According to the invention, technical problems of more control terminal interfaces, complex control, high cost and poor reliability of the direct current motor used by the cooking utensil with the heating fan are solved, the optimization of the driving program of the direct current motor on the cooking utensil is achieved, and the technical effects of reducing the cost of the direct current motor and improving the reliability are achieved.

The invention provides a temperature compensation method, a printed circuit board, a compressor and a vehicle. The temperature compensation method comprises the steps of: obtaining a data package, enabling the data package to comprise a plurality of data pairs, enabling each data pair to comprise an associated voltage and a measurement temperature, and enabling the measurement temperature to be calculated through a voltage and voltage temperature relation, performing clustering calculation on the data package to obtain a plurality of central data pairs, and forming a central data pair group bythe plurality of central data pairs, fitting a voltage temperature curve by the central data pair group, and generating a temperature compensation model according to the voltage temperature curve andthe theoretical voltage temperature curve, the temperature compensation model being used for compensating the measurement temperature. According to the temperature compensation method provided by theinvention, the digital signal of the NTC temperature-sensitive resistor is acquired, the data is analyzed by using a signal processing method, and finally, the temperature compensation model for monitoring the temperature in real time is established to compensate the measurement temperature, so that the temperature detection precision can be improved, and the printed circuit board can be protected more effectively.