56results about How to "Have a technical effect" patented technology

The invention provides a foreign body detection method and system based on an impedance characteristic. The method comprises the steps that a detection coil is laid in an area to be detected, wherein the detection coil is connected with a capacitor element to form a resonant circuit, and a high frequency carrier signal is loaded on the resonant circuit; a resonant current signal on the resonant circuit is collected; other induction signals outside the frequency band of the high frequency carrier signal are filtered out; and finally, amplitude and phase analysis is carried out on the filtered resonant current signal to determine whether a foreign body is in the area to be detected. The method has the advantages that the impedance change of the detection coil is correspondingly acquired by detecting the change of the phase and amplitude of the resonant current signal, so as to judge whether a foreign matter exists. The method has the advantages of low cost and good effect. The original system is changed less. Especially for a wireless power transmission system, without affecting the efficiency of the original system, the method and system can be well adapted to foreign body detection in a variety of magnetic fields to improve the safety of the wireless power transmission system.

The invention provides a face authentication and face recognition method. The eye-open image and the eye-close image of a person under authentication are acquired by the camera of a mobile terminal, and whether the face is a live face is judged by comparison of the eye area of the eye-open image and the eye area of the eye-close image so that the risk of criminal obtaining benefits by stealing others' photos for authentication can be simply and effectively prevented. Then whether the face image on the ID card is matched with the eye-open image of the face is judged, and the person can enter an operation platform if the judgment result is yes, wherein the constant features of the face are selected in matching: the distance between the corners of the mouth, the distance between the corners of the eyes, the distance between the left and right boundaries of the face, the distance between the upper and lower boundaries of the face and the distance between the corners of the mouth and the left and right boundaries so that feature vectors are constructed, and the problem of low recognition rate caused by the change of the age and the hair styles can be greatly solved.

The invention provides a parameter optimization method of EC-WPT system based on complementary symmetrical LCC resonant network At first, that initial value E of the input voltage, the equivalent capacitance Cs of the couple mechanism and the load resistance RL are determined according to the application situation; Then, the system efficiency Eta is taken as the objective function, and the variables f and k are taken as the parameters to be optimized to initialize the population. Then, the optimal solutions of f and k are obtained by combining the adaptive genetic algorithm with nonlinear programming when the system efficiency Eta maximizes. At last, whet that system meets the demand of output power is judged, if not, the input voltage E is adjusted and the system is optimized again; If so, all parameters of the system are given. The effect is: using this method to optimize the parameters of the system, under the constraints of ZPA, low excitation voltage, small compensation inductanceand transmission distance, the optimal parameters of the system transmission power are obtained, and the optimal comprehensive performance of the system is achieved.

The invention provides a preparation method of a CsPbI3 thin film. The preparation method includes the following steps that the surface of a monocrystalline silicon substrate is cleaned, and the monocrystalline silicon substrate is placed in a vacuum growth room of a pulse laser deposition system after the surface is blown to be dry through nitrogen; a target material is etched through the pulse laser deposition technology, and a layer of CsPbI3 thin film grows on the surface of monocrystalline silicon; the CsPbI3 thin film is placed under an iodine steam environment to be subjected to annealing treatment, and in other words, the CsPbI3 thin film is recrystallized under the iodine steam environment; and a sample is taken out after growth ends, is cleaned with deionized water and is blown to be dry through nitrogen. The preparation method is simple, the reaction temperature is low, the reaction time is short, cost is low, and the preparation method is suitable for industrialized production; and the large-area uniform and compact CsPbI3 thin film high in crystallization quality and excellent in photoelectric property can be obtained, and application of the CsPbI3 thin film to the field of photoelectric devices such as luminescent materials and solar cells is met.

The invention provides a skin image information processing-based age testing method. According to the invention, based on the mining of age-related changing texture information of skin surface, a novel, simple and noninvasive age estimation method is provided for medical workers. According to the skin image information processing-based age testing method, a skin image of the middle segment of the ventral side of a forearm is acquired in a noninvasive manner; preprocessing and feature extraction are performed on the acquired skin image, so that relevant parameters of skin grooves and skin ridges are obtained; and the correlation between the parameters and the age is analyzed by using a statistical method, so that the mathematical model of age inference can be obtained. As indicated by statistical results, the skin texture parameters obtained through adopting the method all have high linear correlation with the edge; and when the edge inference model which is obtained through statistical analysis is tested, high accuracy can be obtained. Thus, the effectiveness of the method in age inference can be proved, and cost required by the method is low, and therefore, the method can be prospectively used for objective inference of medical age.

The invention discloses a Pirani vacuum gauge of a carbon nanotube and a vacuum degree detection method thereof, and the vacuum gauge mainly comprises a substrate, a pair of electrodes arranged oppositely and the carbon nanotube, wherein the pair of the electrodes is manufactured on the substrate and the carbon nanotube is carried between the pair of electrodes; the pair of the electrodes is usedfor adding constant current or voltage to the carbon nanotube for heating, because gases in different vacuum degrees have different heat conduction properties, the carbon nanotubes correspondingly have different constant temperatures; furthermore, the resistance of the carbon nanotube changes along with the temperature, and the vacuum degree can be measured by measuring the resistance of the carbon nanotube. The Pirani vacuum gauge of the carbon nanotube is simple in structure, small in volume and stable in performances, and the adopted carbon nanotube has higher resistance temperature coefficient and electrical conductivity, thereby realizing fast response, a wide range of gas pressure measurement, high sensitivity and low power consumption. Furthermore, the manufacturing process of the Pirani vacuum gauge of the carbon nanotube is simple, the cost is low, the finished product ratio is high and the reliability is high.

The present invention provides a refuse landfill intelligent monitoring system and method based on a wireless sensor network. The system comprises uniformly arranged extraction wells in the refuse landfill, the wellhead port of each extraction well is provided with a wireless monitoring terminal, the wireless monitoring terminals of the refuse landfill form one cluster according to five extraction wells or form one cluster according to seven extraction wells to alternately perform network cover in order, the clustering self-organized mode is employed to form a second layer of the wireless sensor network through adoption of first-level cluster head; each wireless monitoring terminal uploads corresponding data in the first-level cluster head, the corresponding data is subjected to compressed sensing through the first-level cluster head and then is sent to a second-level cluster head, and the corresponding data is subjected to compressed encoding through the second-level cluster head and then is uploaded to a remote server; and the remote server decompresses and decodes the received information and analyzes the gas yield condition of each extraction well. Through design of the optimal network topology, the global covering of the whole landfill is ensured, and the two-level clustering layout and the two-level compressed sensing process are performed to allow the monitoring data to be remotely transmitted in real time.

The invention discloses an accelerator switching method, an accelerator switching system and an engineering machine. The accelerator switching method is applied to switching of an accelerator of the engineering machine and includes the steps of judging whether the engineering machine needs work of a remote accelerator or not, if needing, then sending an accelerator switching signal to an electronic control unit of an engine by means of bus communication through a controller and controlling the remote accelerator to work by the electronic control unit, and if the engineering machine needs work of a master accelerator, sending a remote accelerator off signal to the electronic control unit of the engine by means of bus communication through the controller and then controlling the master accelerator to work through the electronic control unit. With the accelerator switching system, driving and construction of the engineering machine can be guaranteed well.

The invention provides an NVIS fast frequency selection system and method based on passive monitoring. The system comprises an NVIS antenna, a duplexer, a communication device and a real-time frequency spectrum monitoring module, the real-time frequency spectrum monitoring module and the communication device share the NVIS antenna through the duplexer, when the communication device is idle, the real-time frequency spectrum monitoring module receives a radio frequency signal through the NVIS antenna and analyzes the frequency spectrum characteristics of the radio frequency signal, and when the communication device is busy, the duplexer switches the NVIS antenna to a communication device connection state, thereby realizing the integration of frequency selection and the communication device. According to the NVIS fast frequency selection system provided by the invention, on the premise of sending no radio detection signal, the system receives an external ionospheric reflection signal to track the change trend of ionized layer F2 layer critical frequency f0F2, quickly captures ''frequency spectrum holes'' in a communication gap, adjusts the communication frequency in real time, and has the advantages of high frequency selection precision, high speed, high concealment, etc.

The invention discloses a water heating circulation device, a seat heating system and a seat heating method. The water heating circulation device is used for engineering machinery, and comprises a circulation pipeline, a temperature sensor, a controller and a first flow control valve, wherein the circulation pipeline comprises a pipe body, and a water inlet and a water outlet that are formed at the two ends of the pipe body; the water inlet is connected with an outlet of engine cooling water through the first flow control valve; the water outlet is connected with an engine water tank; the temperature sensor is arranged on the circulation pipeline, and used for detecting a temperature of the circulation pipeline; a signal input end of the controller is connected with the temperature sensor, and used for receiving temperature signals obtained by the temperature sensor and sending control signals; and the control signals are used for controlling opening and closing or a flow magnitude of the first flow control valve. According to the water heating circulation device, the seat heating system and the seat heating method, the safety of seat heating is improved, and the energy consumption is reduced.

The invention provides a punch manipulator multi-machine Internet and a networking method thereof. The punch manipulator multi-machine Internet includes N sub-networks, N is an integer greater than and equal to 1, the sub-networks are independent from each other, each sub-network includes a main controller node and a plurality of auxiliary controller nodes, wherein the main controller nodes and the auxiliary controller nodes are communicated via CAN buses, each main controller node and each auxiliary controller node are distributed with the only ID value. The multi-machine interconnection is realized by means of flexible networking, the plug-and-play can be realized, and the Internet can be flexibly split into a plurality of sub-networks; the front and rear relation of the manipulator is determined by setting the position mapping relation, the use flexibility is greatly increased; and a three-core shielding twisted pair is used to replace a plurality of IO wires, the wiring is simplified, and the use complexity is reduced.

The invention provides a computer start-up management system and method based on mobile phone encryption. The system comprises a computer which is provided with a TPM module and a Bluetooth module, and a Bluetooth intelligent mobile phone used for computer start-up verification; the TPM module is used for controlling the Bluetooth module to achieve scanning and matching of surrounding Bluetooth devices when the computer is started up, and conducting verification according to an MAC address of the Bluetooth intelligent mobile phone after matching to achieve computer start-up encryption management; the Bluetooth intelligent mobile phone is used for being matched with the Bluetooth module of the computer, and providing the MAC address of the Bluetooth for the TPM module. The computer start-up management system and method based on the mobile phone encryption have the advantages that when the computer is started up, a password does not need to be manually input alone, thus the start-up process is simplified, the complexity of an algorithm is low, the verification speed is increased, the abnormal condition can be timely found, and the hardware cost of a computer system is lowered.

The invention discloses a quantitative detection method for microcosmic combination of a single ceramic spread sheet and a matrix. Ceramic molten drops under different flight properties are obtained through online monitoring of the molten drop temperatures and speeds of different embodiments. Meanwhile, the micro-bonding area between the bottom surface of the spread sheet and the matrix after a single ceramic molten drop in the plasma jet impacts the matrix is quantitatively detected by adopting a pressurizing and gluing method. Statistics is carried out on the actual combination area by usingan image method. A micro-shearing force between the spread sheet and the matrix is dynamically tested in situ through a micro-welding spot strength tester. Finally, a quantitative relation between the flight properties of the ceramic molten drop and the microscopic bonding strength is established, and theoretical support for the precise control and microstructure forming mechanism of the supersonic plasma spraying high-performance thermal barrier coating is provided.

The invention discloses an air purification device, an automotive air purifier and a vehicle. The air purification device comprises an air purification component, the air purification component comprises a first porous planar electrode, a second porous planar electrode and a hydrophilic porous plate; the first porous planar electrode and the second porous planar electrode are oppositely arranged; the hydrophilic porous plate is arranged between the first porous planar electrode and the second porous planar electrode; during the using state, the first porous planar electrode is arranged on an air intake side, and the second porous planar electrode is arranged on an air-out side; the first porous planar electrode is connected with the positive electrode of a direct current pulse power source; and the second porous planar electrode is connected with negative electrode of the direct current pulse power source. The air purification device has a simple structure, can remove dust, sterilize, and degrade various harmful pollutants in air. The invention discloses the automotive air purifier and the vehicle comprising the automotive air purifier, therefore, the vehicle also has the technical effects of the air purification device.

The invention provides a thrombectomy device and a thrombectomy system for aorta and branch arteries thereof and belongs to the field of medical instruments. The thrombectomy device for aorta and branch arteries thereof comprises a guide tube, a guide wire tube, a sheath and a collection assembly, wherein the guide wire tube penetrates through the guide tube, and the front end of the guide wire tube extends out of the guide tube; the collection assembly is arranged at the front end of the guide wire tube and comprises a filter net sleeve arranged on the guide wire tube, an elastic ring and binding wires; the net bottom of the filter net sleeve is arranged on the outer wall of the guide tube, and the net opening of the filter net sleeve surrounds the elastic ring; one ends of multiple binding wires are connected with the elastic ring, and the other ends penetrate through the guide wire tube to be led to the outside of the guide wire tube; and the sheath is arranged on the outer side ofthe guide tube and can move in the length direction of the guide tube so as to retract or release the collection assembly. The thrombectomy device can cooperate with a thrombectomy balloon assembly totake out tumor embolus and effectively prevent the risk of far-end embolism in a thrombectomy process.

The invention relates to the technical field of door bodies, and provides a sliding door assembly and a storage cabinet. The sliding door assembly comprises a door frame, a door body and a first sensor. The door body is mounted on the door frame in a sliding manner, and a door seal is arranged between the door body and the door frame and is connected with a gas pressure adjusting component. The first sensor is arranged to send a first control signal on the basis of inducting a door opening operation request, and the first control signal is used for controlling the gas pressure adjusting component to exhaust gas in the door seal so as to relieve sealing of the door seal to the space between the door body and the door frame. By means of the sliding door assembly, sealing between the door body and the door frame can be achieved through the door seal. When the door opening operation request is inducted, the door seal can achieve automatic exhaust, and then the door body can be opened conveniently. In addition, due to the adopted sliding door assembly, the sliding door assembly can be suitable for space where side-hung doors are not applicable.

The invention belongs to the technical field of force fields and particularly discloses an atomic type definition system and an atomic type matching method. The system comprises an atomic type visualization UI, an atomic type matching module, an atomic type data management module and an atomic type format conversion module, wherein the atomic type data management module comprises an atomic type definition data packet. Through the designed atomic type definition mode, a nesting relation, an inheriting relation, a hierarchical relation, a tree relation and various complicated atomic chemical environments can be described, description capability is improved, richer and more precise atomic types can be described, and force field calculation can be more accurate; convenient operation can be performed on atomic types, and addition, deletion, modification, finding and multidimensional statistical analysis are all quite visual and convenient; and compared with existing methods, efficiency is higher, and matching accuracy is higher.

The invention belongs to the field of primary dilated heart disease treatment, and particularly relates to application of mitochondrial transplantation in treatment of primary dilated heart disease. Humanized induced multifunctional stem cells are obtained and differentiated and induced into beating myocardial cells in vitro, human myocardial cell mitochondria are obtained through separation, mouse myocardial mitochondria are separated at the same time, and human mitochondria and mouse mitochondria are separately obtained for later use. A mouse dilated cardiomyopathy model is constructed by intraperitoneal injection of doxorubicin, the human and mouse mitochondria are transplanted at multiple points on the left ventricular myocardial surface layer of a mouse, the cardiac function of the mouse is detected by an echocardiogram after 6 days, and the change of the myocardial structure of the mouse is detected by histopathology. Research results show that in the construction process of a doxorubicin-induced mouse dilated cardiomyopathy model, the transplanted human or mouse myocardial cell mitochondria can significantly enhance myocardial contraction and relaxation functions and inhibitheart double-chamber cardiac cavity dilation.

The invention relates to the technical field of refrigeration, and provides a water pan of a refrigerator, an air duct assembly of the refrigerator and the refrigerator. The water pan of the refrigerator comprises a cover plate main body and a water collecting trough. A top air duct is formed above the cover plate main body. The water collecting trough is arranged downstream of the cover plate main body in the airflow direction of the top air duct, and the cover plate main body is connected with the water collecting trough. According to the water pan of the refrigerator, due to the fact that the water pan comprises the cover plate main body, and the top air duct is formed above the cover plate main body, on the condition that the evaporator is arranged on the top air duct, water generatedduring frost melt falling off of the evaporator drips to the top of the cover plate main body during frost melt and then flows into the water collecting trough. Furthermore, even if ice blocks fall off, the ice blocks cannot directly enter the water collecting trough and can be at least partially melted by the airflow in the top air duct on the condition that the ice blocks fall to the top of thecover plate main body, so that the possibility that the ice blocks block a water outlet can be avoided.

The invention relates to the technical field of coal bed gas exploitation, and provides a coal bed gas exploitation anti-reflection device and method. The coal bed gas exploitation anti-reflection device comprises an oil pipe suitable for being installed in a drill hole, a piston and a lower fixing block are arranged on the lower portion of the oil pipe, a stamping chamber is arranged between the piston and the lower fixing block, and a first through hole is formed in the lower fixing block; the high-voltage switch assembly is mounted at the first through hole, and the high-voltage switch assembly enables the first through hole to be switched between a conduction state in which the first through hole is communicated with the drill hole and a closed state in which the first through hole is isolated from the drill hole; the high-pressure liquid conveying assembly is communicated with the upper part of the oil pipe; and the gas conveying assembly communicates with the stamping chamber through a gas conveying pipeline, and a switch element is arranged on the gas conveying pipeline. According to the coal bed gas exploitation anti-reflection device, continuous impact on the coal bed is achieved, the permeability of the coal bed is rapidly improved, the coal bed gas extraction efficiency is improved, and the coal bed gas exploitation anti-reflection device has no requirement for a water source and is easy to operate, low in cost and small in stratum pollution.

The invention belongs to the technical field of a multi-channel pulse amplitude analyzer, and particularly relates to a digital current multichannel parallel quick current pre-discharging system. Thesystem is mainly composed of a power supply part circuit and a current pulse signal amplifying circuit part. The power supply part comprises two symmetric parts, wherein the two symmetric parts are composed of a positive power supply input and a negative power supply input. The positive power supply input and the negative power supply input are connected with a pi-type LC filter circuit, and are connected with an electronic filter circuit. The positive power supply input and the negative power supply input are respectively connected with a positive power supply chip and a negative power supplychip. The positive power supply chip and the negative power supply chip are connected with operation amplifier power supply decoupling circuits. The two operation amplifier power supply decoupling circuits are connected with the current pulse signal amplifying circuit part. The system supplies lossless readout and amplification of an original fast current signal of a photoelectric converter in the system. On the condition of an ultrahigh-speed current signal, signal amplification is realized, and furthermore the time characteristic and the amplitude characteristic of the original time are wholly kept, thereby laying a basic for time spectrum measurement for digital current multiple channels.

The invention relates to a toggle rod overturning mold clamping mechanism which comprises a fixed template, a movable template, a tail plate and a push plate. A pull rod is arranged between the fixedtemplate and the tail plate. The toggle rod overturning mold clamping mechanism further comprises a front toggle rod, a first back toggle rod, a second back toggle rod and a connecting toggle rod. Oneends of the back toggle rod and the second back toggle rod are hinged to the tail plate while the other ends of the back toggle rod and the second back toggle rod are hinged to one end of the front toggle rod, the other end of the front toggle rod is hinged to a movable template, a hinge hole is formed in the push plate, one end of the connecting toggle rod is connected to the push plate througha hinge shaft arranged on the hinge hole, and the other end of the connecting toggle rod is separately hinged to the first back toggle rod and the second back toggle rod, separately. A guide bar is arranged on the tail plate, guide holes are formed in two sides of the push plate, and the guide bar penetrates the guide holes. The push plate of the mold clamping mechanism is not guided by four pullrods but is guided by the guide bar on the tail plate. The action force of the small toggle rod to the push plate is transferred by means of a shaft of the hinge point, so that bending moment action to the push plate is avoided, and therefore, the risk that the push plate is broken to lose effect as a result of too large bending moment is eliminated.

The invention provides a rural power grid electricity stealing detection system and a control method thereof. A cluster head node is arranged at the wire outgoing end of a transformer and a main transmission line for providing power for N home users; the home-entry end of each home user is provided with an intelligent distribution cabinet as a sub node; each cluster head node and N sub nodes in ajurisdiction area form a cluster; through acquiring the electricity use parameter on the main transmission line and the user electricity use parameters of the N sub nodes in the cluster, the cluster head node judges whether electricity stealing happens to the jurisdiction area, and if electricity stealing happens, the cluster head node sends alarming reminding information to the N sub nodes in thecluster, and the additional power caused by electricity stealing are shared by the N users in the cluster. The system and the method provided in the invention have the effects that local supervisionand management are made full use of to find out and eliminate electricity stealing phenomena in real time, the maintenance cost of a power system is reduced, and based on a power consumption sharing mechanism, the loss of a power management department can be reduced.

The invention discloses a fan pedestal, comprising a chassis and a supporting pin group arranged on the chassis; the supporting pin group comprises two supporting pins hinged to the chassis, wherein a buckle is hinged to one supporting pin, and a locking bump matched with the buckle when at least one supporting pin is arranged at an unfolding state is arranged on the other supporting pin. In the fan pedestal, as the supporting pins are hinged to the chassis, the supporting pins have at least two states unfolding and folding, and the supporting pins when being located at the unfolding state can provide steady supporting, and can reduce the floor space of the fan pedestal when being arranged at the folding state. Due to the adoption of the fan pedestal, the trouble of users that the fan pedestal is difficult to collect is avoided, the users can collect the fan pedestal with a reduced size only by a simple operation of folding the fan pedestal without demounting, the collection is facilitated and the space is reduced. The invention further discloses an electric fan provided with the fan pedestal.

The invention provides an underwater in-situ image restoration system and a method thereof. The system comprises an underwater robot framework, laser flashlights, CCD cameras and supports. The underwater robot framework has N cross bars which are located on a same horizontal surface. The N is an integer which is greater than or equal to 3. One end of each cross bar is provided with each laser flashlight. The other end of each cross bar is provided with each support. The CCD cameras are installed on the supports. The laser flashlights directly face towards the CCD cameras. Light beams emitted by the laser flashlights and lenses of the CCD cameras are located at a same horizontal line. In the invention, a non-blind restoration method is adopted; under a known point diffusion function (PSF) condition, image information can be accurately extracted and a clear image is acquired; a quality decrease problem of underwater image shooting is solved; and image restoration quality is increased and the system and the method are suitable for quality decrease image restoration of different water qualities.

The invention discloses a relay protection device mutual inductor plate adjusting system and method, and relates to the technical field of electric power. The adjusting system comprises a calibrationsource, a calibration device and an upper computer, and every two of the calibration source, the calibration device and the upper computer are connected with each other. The calibration source provides voltage and current analog quantity for the calibration process; the calibration device is used for calibrating the mutual inductor board, reading and writing calibration coefficients and identification codes and interacting with an upper computer; and the upper computer is configured with upper computer software, and the upper computer software is used for storing board card information and calibration coefficients of the mutual inductor boards and providing statistical analysis of the defective rate and consistency of the mutual inductors in batches. According to the relay protection device mutual inductor plate adjusting system and method, different types of mutual inductor plates can be compatible, the function of calibrating the mutual inductor plates in batches is achieved, the calibration efficiency and the calibration universality are improved, and powerful data support is provided for use of the mutual inductor plates in batches.

The invention provides an indoor parking lot parking space guidance system and a map reconstruction method. The system is characterized in that the system comprises parking space terminals corresponding to parking spaces respectively, at least three wireless APs, a server and a guidance indication board. On one hand, each parking space terminal is used for detecting occupation situation of the corresponding parking space; and on the other hand, the parking space terminal is connected with the at least three wireless APs and realizes coordinate position calibration of each parking space througha triangulation location method. The server finishes reconstruction of a parking space map according to the coordinate position information of each parking space, and meanwhile, controls the guidanceindication board to display corresponding guidance and indication information according to the parking space occupation situation. The beneficial effects are that, under the condition of having no indoor parking lot priori map, the parking lot parking space guidance map can be reconstructed based on the relative position information of a parking lot; and indoor parking lot parking space guidanceunder the condition of no GPS signal or weak GPS signal can be realized.

The invention relates to an electronic controller clamping device of a vehicle. The device comprises an upper box, a lower box, a handle rotating mechanism, a gear transmission mechanism, a plane cammechanism, a space cam mechanism, a connecting rod mechanism, a probe floating mechanism, and a product positioning assembly. The handle rotating mechanism, the gear transmission mechanism, and the space cam mechanism are arranged on the lower box. The plane cam mechanism, the connecting rod mechanism, the product positioning assembly, and the probe floating mechanism are arranged on the upper box. Through external forces, a handle is pushed to realize triple transmission. In the first half of rotation of the handle, alignment of the product positioning assembly and the probe floating mechanism is realized. In the second half of rotation of the handle, the product positioning assembly is realized to vertically move upward, to complete butt joint of a product with a probe. At the moment, anelectromagnet locks a positioning plate to achieve a clamping maintaining state. The device is simple in operation and clever in mechanism, and is suitable for popularization and application.

The invention discloses a water heating circulation device, a seat heating system and a seat heating method. The water heating circulation device is used for engineering machinery, and comprises a circulation pipeline, a temperature sensor, a controller and a first flow control valve, wherein the circulation pipeline comprises a pipe body, and a water inlet and a water outlet that are formed at the two ends of the pipe body; the water inlet is connected with an outlet of engine cooling water through the first flow control valve; the water outlet is connected with an engine water tank; the temperature sensor is arranged on the circulation pipeline, and used for detecting a temperature of the circulation pipeline; a signal input end of the controller is connected with the temperature sensor, and used for receiving temperature signals obtained by the temperature sensor and sending control signals; and the control signals are used for controlling opening and closing or a flow magnitude of the first flow control valve. According to the water heating circulation device, the seat heating system and the seat heating method, the safety of seat heating is improved, and the energy consumption is reduced.

The invention provides a congested city display method, a congested city display system, a terminal for congested city display, computer equipment and a computer readable storage medium, and the congested city display method comprises the steps: obtaining information of the congested degrees of a plurality of cities, and ranking the plurality of cities according to the sequence of the congested degrees from high to low; obtaining the congestion cities ranked in the front preset number; and according to the congestion degree ranking of the congested cities, displaying icons of the congested cities on a map in a preset mode. Therefore, scattered display or mutual coverage of the city icons due to display of more city icons is avoided, and different congestion conditions of the city can be visually expressed.