73 results about "Automatic switching system" patented technology

The invention relates to the technical field of databases, in particular to a main and standby automatic fault switching system and method based on database state awareness, and the system comprises a daemon module which is used for monitoring the operation condition of a local database in real time, and periodically publishing and updating the state information of the local database; the synchronization program module is used for regularly connecting the main database and the local database and executing a differential synchronization strategy according to different synchronization requirements and environmental factors; the main library inquiry interface module is used for sending a transmission control protocol message to the daemon module; and the coordination program module is used for executing decisions of the main and standby library roles, managing and issuing main library information, and regularly updating the main library information and database information. The multi-node daemon program, the multi-node synchronization program, the main library inquiry interface and the single instance coordination program are integrated to jointly form the database fault automatic switching system, safe and accurate automatic switching during main library fault is achieved, and the safety of the main and standby automatic switching process is ensured.

The invention discloses a multi-mode coordinated ship main and auxiliary power automatic switching system, which relates to the technical field of ship power systems and comprises a monitoring system, a diagnosis decision system, an execution system, a switching verification system, a maintenance management system and a data communication system. According to the invention, the airborne weather radar, the ship weather instrument and the weather fax receiver are used for monitoring the current weather condition of navigation and predicting the weather condition of a future navigation route, so that a prediction basis is provided for a power system operation mode selected by future ship navigation; meanwhile, the ship weather instrument monitors surrounding wind speed, wind direction, air temperature and humidity data in real time when the ship sails, the current data is stored in the data storage, a database is formed, and a follow-up maintenance management system can predict potential risks according to historical data conveniently.

The invention relates to the technical field of intelligent lighting control, in particular to a solar street lamp dual-mode power supply automatic switching system which comprises a feature extraction module, a controller and a switch module. The feature extraction module obtains pedestrian position, vehicle position and environment illumination intensity data through a multi-source sensor, and environment feature vectors are generated after the data are processed by a convolution encoder. And the controller inputs the feature vector into a power prediction model based on LSTM, and outputs a target power consumption power meeting a pedestrian warning illumination demand. When the target power exceeds the output threshold value of the storage battery, the controller controls the switch module to be switched to the power grid for power supply and accurately adjusts the output power of the power grid to the target value. According to the system, the illumination intensity is dynamically adjusted according to the traffic condition, the system is automatically switched to the power grid for power supply when the solar power supply is insufficient, and the road safety and the energy utilization efficiency are effectively improved.

The invention discloses a multi-path power source redundant power supply control method and system, and belongs to the technical field of power electronics, the system comprises a dynamic priority decision module, a zero-voltage-drop switching circuit and a fault safety framework, the dynamic priority decision module supports a user to customize a power source use priority rule through an MCU, and the zero-voltage-drop switching circuit is used for switching the zero-voltage-drop switching circuit to the fault safety framework. The MCU can autonomously carry out an automatic degradation and upgrading mechanism through voltage quality; according to the zero-voltage-drop switching circuit, when the MCU detects a fault of the main power supply, a target power supply pre-charging path is started, and when the target power supply is pre-charged until the voltage difference between the target power supply and the source voltage is smaller than or equal to 0.1 V, the target power supply GaNFET can be synchronously triggered to be switched on, and the pre-charging circuit and the original power supply GaNFET can be synchronously triggered to be switched off. The multi-path power supply input automatic switching circuit solves the problems of power-off risk, easy conduction loss and relatively high failure rate in the prior art, is suitable for a multi-path power supply input automatic switching system of a decoder and industrial control equipment, and is particularly suitable for a long-time uninterrupted power supply condition.

The present invention discloses a method and system for recovering acid from carbon nanotube purification using a ceramic membrane, and relates to the technical field of carbon nanotube purification recovery, including: delivering carbon nanotube purification waste liquid to the feed end of a corrosion-resistant ceramic membrane assembly; adjusting the first parameter of the corrosion-resistant ceramic membrane assembly to a preset range, performing diffusion dialysis, and allowing the acid component in the carbon nanotube purification waste liquid to selectively permeate the ceramic membrane in the corrosion-resistant ceramic membrane assembly; real-time monitoring of the concentration of the acid component that permeates the ceramic membrane, calculating the dynamic separation index of the acid component according to the concentration, and automatically activating the automatic switching system when it exceeds a preset threshold value, and introducing the acid component into different recovery acid storage tanks; the control system automatically adjusts the delivery rate and the first parameter of the carbon nanotube purification waste liquid according to the dynamic separation index, and optimizes the recovery efficiency of the acid component. The present invention realizes multi-parameter coordinated optimization and real-time regulation, thereby improving the acid recovery efficiency in the purification process, reducing energy consumption, and extending the life of the equipment.

The invention discloses a full-automatic abnormal EUT equipment (electric energy meter) detection system, and relates to the field of medical care equipment, and the system comprises a detection device which is used for simulating various on-site power-on environments; the communication system is used for realizing communication with EUT equipment (an electric energy meter) and a master station; the automatic switching system controls a multi-path relay through a system command to realize random sequencing output of current A / B / C phase lines and voltage A / B / C / N phase lines, and meanwhile, an anti-short-circuit mechanism is arranged on software and hardware; the identification system is used for judging whether the EUT equipment (electric energy meter) is abnormal or not according to the content of the message replied by the EUT equipment (electric energy meter); a master station system; the invention discloses an anti-misoperation protection system. The test period of the three-phase electric energy meter is greatly shortened through the highly automatic detection process, and compared with traditional manual test, the system can solidify the test scheme and process and effectively reduce negligence and omission of human factors, so that the accuracy and reliability of detection are remarkably improved.

The invention belongs to the technical field of biological feature recognition, and discloses an automatic recognition and automatic switching system based on a multifunctional USB peripheral interface, which comprises a function module, a state detection module, a USB signal switching module and a main control module, the function module is used for accessing an external device and feeding back a voltage signal to the main control module and the state detection module; the state detection module is used for judging whether external equipment is accessed or not and judging the type of the accessed external equipment; the USB signal switching module is used for opening an internet access channel or a PC / OTG channel; the beneficial effects of the invention are as follows: 1, hardware-level channel gating is realized, software intervention is not needed, and rapid switching is realized; 2, a special detection chip is not needed, and the cost is reduced; and 3, the interface resource utilization rate is improved, and the system redundancy is reduced. And 4, three scenes of the internet access, the PC and the OTG are automatically identified, user configuration is not needed, and the compatibility is good.

The invention provides an auxiliary power supply automatic switching system and method based on a BMS, and belongs to the technical field of automobile power supply management, and the system comprises an intelligent boost module which is used for receiving an input voltage and transmitting the input voltage to a BMS auxiliary power supply switch, and the BMS auxiliary power supply switch is electrically connected with the intelligent boost module and used for switching the input voltage to the BMS auxiliary power supply switch. The charging control module is electrically connected with the BMS auxiliary power switch and the charging control module and used for receiving an external control instruction and an input voltage, closing itself based on the external control instruction and transmitting the input voltage to the automobile power management system, and the automobile battery management system is electrically connected with the BMS auxiliary power switch and the charging control module and used for receiving the input voltage and supplying power to itself based on the input voltage. The power supply module is used for generating BMS message information based on the self power supply state and sending the BMS message information to the charging control module, and the charging control module is used for receiving the BMS message information and confirming the power supply state of the automobile battery management system.

The invention relates to a network spare power automatic switching rapid fault isolation and power recovery method based on a power grid dispatching control system. The power grid dispatching control system controls a power grid system, the power grid system comprises a plurality of power grid components, and the method comprises the following steps: in response to a fault in the power grid system, for each power grid component, calculating a first anomaly degree of the power grid component in a current actual fault network according to the number of associated links of the power grid component; calculating to obtain a second anomaly degree of the power grid component in the simulated fault network based on a predetermined number of associated links of the power grid component in the simulated fault network; determining an abnormal power grid component in the power grid components based on the first anomaly degree and the second anomaly degree calculated by each power grid component; and according to the simulation fault description information and the abnormal power grid component, determining an isolation component, and after the isolation component is isolated, performing power restoration on the power grid system. By adopting the method, the power grid component with the fault can be determined, and power restoration is performed after isolation, so that the power restoration efficiency is improved.

The application relates to a refrigerator automatic opening and closing system, which comprises a box body, a door body and an automatic opening and closing module. The automatic opening and closing module comprises a base, an ejection mechanism, a linkage mechanism, an intermittent gear mechanism, a clutch gear mechanism, a driving mechanism and a control mechanism. The ejection mechanism comprises an ejection rod and a first elastic component, the ejection rod is used for abutting against a position of the door body far away from a door shaft, the linkage mechanism is used for being connected with a position of the door body close to the door shaft, the intermittent gear mechanism comprises an intermittent gear, and the intermittent gear is processed with gear teeth in a circumferential direction, the intermittent gear is used for being driven with the ejection rod, and the clutch gear mechanism is used for being driven with the linkage mechanism. The power part of the application only needs one driving component and one clutch, and can complete the ejection of the refrigerator door body and the automatic opening and closing of the door, so that the structure is simple and the cost is low.

This invention discloses a priority-based intelligent control multi-power automatic switching system, belonging to the field of DC power supply management technology. The system supports 3≤N≤9 power supply paths, including N-1 conventional DC input power supply paths and 1 fixed lowest-priority battery backup power supply path. Voltage data is collected through an isolated voltage acquisition module; a power supply decision module calculates and dynamically sorts power quality assessment values ​​based on time-weighted historical cumulative voltage data, and outputs circuit control commands in conjunction with hard access verification; a switching timing control module executes seamless command switching with a duration less than the maximum power supply duration of the load capacitor; a fault locking module locks continuously faulty power supply paths with only manual reset; and a display and alarm module displays and alarms the circuit operating status. This invention significantly improves power supply reliability and enhances fault protection mechanisms, making it suitable for high-reliability DC power supply scenarios such as industrial control and medical equipment.

This invention discloses an automatic switching system, method, and drive circuit for an uninterruptible power supply (UPS) in the field of power electronics. It includes a power module for providing electrical energy to the system; a relay switch unit for controlling the switching of mains power input; an accelerated turn-off unit for accelerating the turn-off of the relay switch unit; a circuit switching unit for switching a high-current drive circuit to a low-current drive circuit after a predetermined delay; and a control module for outputting a high-level signal to control the circuit switching unit to switch the high-current drive circuit to accelerate the closing of the relay switch unit, and outputting a low-level signal to control the accelerated turn-off unit to accelerate the turn-off of the relay switch unit. This invention employs a delayed switching drive design and an accelerated turn-off unit, which significantly simplifies the power supply hardware design, reduces the power requirements of the auxiliary power module, and significantly shortens the relay turn-off time, ensuring the stability and reliability of the UPS during the switching process.

The invention discloses an electric carry-scraper battery power supply automatic switching system, and belongs to the technical field of energy storage and power supply, the electric carry-scraper battery power supply automatic switching system is provided with a storage battery pack and a switching structure, the switching structure comprises a locking cylinder and a detection circuit, a reciprocating column is arranged in the locking cylinder, switching cylinders are uniformly distributed on the lower surface of the locking cylinder, and wheel driving cylinders are arranged below the switching cylinders; a charging block and a discharging block are arranged in the wheel moving cylinder, the charging block and the discharging block can be connected with the positive electrode of a storage battery in the storage battery pack in turn through reciprocating operation of the reciprocating column in the locking cylinder, the detection circuit can detect the discharging time of the storage battery, and the storage battery in the storage battery pack meets the power supply requirement of the electric carry-scraper and also can be connected with the positive electrode of the storage battery in turn. The storage batteries in the storage battery pack can be automatically switched between charging and discharging, the operation time of the electric carry-scraper is prolonged, the charging efficiency of the storage batteries is improved, and the utilization rate of the storage batteries is increased.

The utility model relates to the technical field of fuel systems, in particular to a fuel gas-fuel oil automatic switching system which comprises an electronic injection valve, a fuel gas control valve and an engine. The electronic injection valve is installed on an engine and comprises a valve body, an electronic controller and a fuel nozzle, the electronic controller and the fuel nozzle are arranged on the valve body, and the fuel nozzle is used for supplying fuel to the engine. The fuel gas control valve is communicated with the engine through a pipeline and used for supplying gas to the engine, a pressure sensor is arranged on the fuel gas control valve, the pressure sensor is electrically connected with the electronic controller, and the pressure sensor is used for detecting fuel gas pressure and transmitting a fuel gas pressure signal to the electronic controller. The electronic controller is used for automatically controlling opening and closing of the gas control valve and the electronic injection valve according to the gas pressure signal. The fuel gas and fuel oil switching method has the effect of improving the intelligence and convenience of fuel gas and fuel oil switching.

The application discloses an automatic switching system and method for a pulverized coal screw conveyor of an IGCC unit, and belongs to the technical field of coal powder distribution. The system comprises a first coal grinding conveying device, a second coal grinding conveying device, a third coal grinding conveying device and a fourth conveyor. The first coal grinding conveying device comprises a first filter, a first conveyor and a first pulverized coal storage tank. The first filter is connected with the first conveyor and the fourth conveyor through a first three-way valve respectively, and the first conveyor is connected with the first pulverized coal storage tank. A second filter is connected with a second conveyor and the fourth conveyor through a second three-way valve respectively, and the second conveyor is connected with a second pulverized coal storage tank. A third filter is connected with a third conveyor and the fourth conveyor through a third three-way valve respectively, and the third conveyor is connected with a third pulverized coal storage tank. The application can effectively avoid the occurrence of personal injury and equipment damage caused by the failure of workers to find and operate in time.

The application discloses an eSIM Profile remote delivery and automatic switching system, comprising: a terminal device, used for pre-setting a seed Profile, establishing a communication session with a cloud eSIM management platform through the seed Profile, reporting location data, network state and current Profile information, and completing target Profile receiving, installation, activation and failure fallback; the cloud eSIM management platform is used for obtaining relevant call and charging characteristic data and judging whether the switching condition is met, and when the switching condition is met, the target Profile remote delivery is applied; the operator interface is used for providing relevant call and charging characteristic data to the cloud eSIM management platform, and remotely delivering the Profile; the data layer is used for storing terminal device historical performance data, and analyzing operator cost and coverage data. The application also discloses an eSIM Profile remote delivery and automatic switching method, an electronic device and a computer readable storage medium. The application improves switching accuracy and automation level, and reduces communication cost.

The invention discloses a power grid uninterruptible power supply automatic switching system and method and a driving circuit, and belongs to the technical field of power electronics, and the system comprises a power supply module which is used for providing electric energy for the system; the relay switch unit is used for controlling the on-off of commercial power input; the acceleration turn-off unit is used for accelerating turn-off of the relay switch unit; the circuit switching unit is used for switching the large-current driving loop into a small-current driving loop after a preset time is delayed; and the control module is used for outputting a high-level signal to control the circuit switching unit to switch the large-current driving loop to accelerate the closing of the relay switch unit, and outputting a low-level signal to control the acceleration turn-off unit to accelerate the turn-off of the relay switch unit. The delay switching driving design and the acceleration turn-off unit are adopted, the power supply hardware design can be greatly simplified, the power requirement of the auxiliary power supply module is reduced, meanwhile, the turn-off time of the relay is remarkably shortened, and the stability and reliability of the power grid uninterruptible power supply in the switching process are ensured.

The utility model provides a power supply automatic switching system, and belongs to the technical field of power supply management. The power supply switching circuit comprises a switching unit, a first input end, a second input end and a first output end, the first input end and the second input end are connected with the first output end through the switching unit, the first input end is connected with a first voltage, and the second input end is connected with a second voltage. By switching the first voltage and the second voltage, the technical problem that a vehicle-mounted positioning terminal, a communication terminal and the like in an automobile are powered off and cannot work when the power supply of the whole automobile is powered off accidentally is solved; and the standby power supply voltage is provided through the second voltage, so that the standby power supply voltage can be switched through the power supply switching circuit even when the power supply of the whole vehicle is accidentally powered down, and then the vehicle-mounted positioning terminal, the communication terminal and the like in the vehicle can be maintained to be powered off and work normally, and the situation that vehicle information cannot be uploaded and monitored in real time, and data loss is caused is prevented.

The utility model discloses a controller detection device and test equipment. The detection device comprises a voltage detection module, a first indication module, a main power supply and at least one standby power supply; the controller comprises at least two terminal strips; the power supply end of one terminal strip is connected with a main power supply, and the other terminal strips are connected with a standby power supply; the detection end of the voltage detection module is connected to the main power supply, the output end of the voltage detection module is connected with the control end of the terminal strip, and the voltage detection module outputs an abnormal signal when detecting that the main power supply is abnormal and transmits the abnormal signal to the control end of the terminal strip; the control end of the terminal strip is connected to a first power supply, the detection end of the terminal strip is connected with the first indication module, the controller switches a power supply according to an abnormal signal and controls the control end of the terminal strip correspondingly connected with the power supply for supplying power to be connected with the detection end, and the first indication module displays the working state of the controller. The controller detection device can detect the controller in advance, so that the fault controller is prevented from being connected to the power supply automatic switching system.

The invention discloses a trolley automatic switching system and a using method, the trolley automatic switching system comprises a robot and a roller bed, the roller bed is provided with a trolley, the trolley is provided with a trolley body front part supporting subassembly, a trolley body front part positioning subassembly, a trolley body rear part positioning subassembly and a trolley body rear part supporting subassembly, the trolley body front part supporting subassembly comprises a turnover mechanism, and the turnover mechanism comprises a turnover mechanism. The vehicle body front positioning subassembly comprises a translation mechanism, the vehicle body rear supporting subassembly comprises a turnover mechanism, the vehicle body rear positioning subassembly comprises a translation mechanism and a turnover mechanism, and a switching tool is arranged on the robot. The switching tool comprises a clamping unit used for switching the state of a translation mechanism on the trolley and a shifting rod unit used for switching the state of a turnover mechanism on the trolley. The system is flexible in switching, high in efficiency and low in cost.

The invention discloses a backup power supply automatic switching method and system for a regional power grid containing new energy, and relates to the field of power grid safety and stability control. The method comprises the steps that when a main power supply line of the regional power grid trips, a backup power supply automatic switching system is started; when the main supply line switch meets the condition, the new energy incoming line switch is cut off, and after a preset time, the main supply line switch is tripped, and the standby supply line switch is switched on; and judging whether spare power automatic switching is successful or not, and if yes, closing a new energy station incoming line. According to the invention, by controlling the connection and disconnection of the new energy incoming line in stages, the backup power automatic switching is ensured to act correctly to recover power supply, and the reliable power supply of a regional power grid and the rapid grid-connected recovery of the new energy are ensured. Under the supporting action of the new energy station, the bus voltage of the transformer substation does not meet the non-voltage condition, and the spare power automatic switching cannot act; meanwhile, rapid grid connection of the new energy station can be guaranteed, and absorption of new energy is promoted.

The invention relates to the technical field of Internet of Things, industrial Internet and identification analysis, in particular to an automatic exchange system of Internet of Things and Internet of Things models based on identification analysis. According to the technical scheme, the system comprises a supplier Internet of Things product management subsystem and a purchaser Internet of Things equipment management subsystem, wherein the supplier Internet of Things product management subsystem comprises a product management module, an equipment management module, an identification service module and a sharing configuration module. According to the method, the characteristics of heterogeneous data sharing and cross-enterprise data transmission of the national identification analysis system are utilized, the sharing of the Internet of Things equipment model among enterprises is provided, the use efficiency of the equipment in the enterprises is improved, and the use cost is reduced; and the adaptive characteristic of a protocol between the equipment management platform and the equipment is provided, and an equipment communication protocol and a data format are automatically analyzed through an identification analysis technology, so that the equipment management platform can access the equipment more efficiently and smoothly.

The invention provides a robot clamp automatic switching method and system and a nonvolatile storage medium, the robot clamp automatic switching method is applied to the robot clamp automatic switching system, and the robot clamp automatic switching system comprises a robot, a workbench and a plurality of clamps arranged on the workbench. The switching method comprises the steps that feature information corresponding to a plurality of clamps is obtained, a target clamp corresponding to a to-be-machined workpiece is determined according to the feature information, and the feature information comprises the model and size corresponding to each clamp; the robot is controlled to move to a target position corresponding to the target clamp, so that the tail end mounting part of the robot is in butt joint with the mounting end of the target clamp; and acquiring a gas path running state after the target clamp is butted with the robot, and determining whether the target clamp is mounted or not according to the gas path running state. The technical problems that in the related technology, positioning errors exist in the manual switching process of a traditional clamp, and an air path is not stable are solved.

The invention relates to the field of nuclear technology and automatic detection, and provides a high-precision automatic sample change detection device for mass neutron imaging experiments and an experiment method. The device comprises a sample library system and an automatic sample switching system, the sample library system can store and manage at least 200 sample boxes, and the automatic sample switching system adjusts the sample boxes to an experiment area and returns the sample boxes; the two systems work cooperatively, batch parallel processing of hundreds of samples is achieved, the problem of difficulty in automatic sample replacement of a large-batch sample experiment is solved, the experiment efficiency is improved, and the consistency and reliability of experiment data are ensured; the device runs fully automatically, experimenters are liberated, and the utilization efficiency of human resources is improved; and the device is suitable for samples of different sizes, wide in applicability, capable of improving the experiment efficiency by 70%, convenient for classified storage and management of the samples, suitable for various neutron line stations, and high in universality and economical efficiency.

The invention relates to the technical field of voltage loss compensation, in particular to a direct current bus voltage loss automatic switching system and a compensation control method. The voltage adjusting unit is electrically connected with the protection filtering unit, the power correction unit, the coordination control unit, the safety conversion unit and the stable output unit. And the voltage adjusting unit adopts a parallel redundancy design. The output and input voltage constant machine core can output voltage to form a machine core output condition; the output voltage needs to be lower than the input voltage, otherwise, the system is in a hot standby state, and a blocking circuit opening condition is formed; and after voltage loss of one side of the given bus is given, the machine core outputs to the voltage loss side to form a blocking bridge conduction condition. The direct-current bus voltage can be automatically detected, automatic starting can be achieved when the voltage loss condition is detected, manual intervention is not needed, and delay and errors caused by manual operation are avoided. The device integrally ensures the stability of the DC bus voltage, improves the utilization rate of equipment, prolongs the service life of the equipment, reduces the manual maintenance workload through automatic operation, and reduces the maintenance cost.

The invention relates to the technical field of industrial automation equipment, and discloses a double-station direct-drive type tray automatic exchange system which comprises an architecture construction module, a cooperative control module, a track synchronization module, an interference compensation module and a maintenance management module. The framework construction module is used for establishing a driving framework comprising an embedded double-side linear motor and a double-acting cylinder, presetting reconfigurable station parameters, matching a driving mode and establishing an associated database; the cooperative control module is used for adaptively adjusting the tray through a multi-sensor array in combination with structures such as a dovetail guide rail and the like, so that closed-loop control is realized; the track synchronization module plans a driving switching strategy based on a database, and adjusts a synchronization mode according to track deviation and load difference; the interference compensation module processes vibration, temperature and other interferences, and dynamically compensates to counteract the influence; the maintenance management module monitors the equipment state and determines the maintenance level in combination with the structure wear parameters. In addition, the processing flow of visual identification and gravity center data is defined, and stable and efficient operation of the system is ensured.

The invention discloses an evaporative cooler spray gun medium automatic switching system and method. The evaporative cooler spray gun medium automatic switching system comprises an evaporative cooler and a coarse ash hopper connected to a discharging opening in the bottom of the evaporative cooler. A spray nozzle for spraying is arranged at the upper end of the evaporative cooler, and a water supply pipeline, a saturated steam pipeline and a nitrogen pipeline are connected with the spray nozzle; a water supply regulating valve, a water supply pressure gauge and a water supply flowmeter are arranged on the water supply pipeline; a total flow meter, a total pressure gauge, a steam electric stop valve, a steam pressure gauge and a steam flow meter are sequentially arranged on the saturated steam pipeline; and a nitrogen electric stop valve, a nitrogen pressure gauge and a nitrogen flow meter are sequentially arranged on the nitrogen pipeline. Steam is used for spraying water, the gas recovery concentration is improved, and the cost is reduced; nitrogen is used for spraying water, automatic spraying of the converter evaporative cooler under the condition of insufficient steam is achieved, meanwhile, it is ensured that a coarse ash system can operate normally, free switching of steam / nitrogen serving as an atomizing medium is achieved, and it is ensured that the system can operate safely, reliably and efficiently.

The invention provides a multi-power-supply automatic conversion system and method, and the system comprises a state structure module which comprises a state linked list structure, the state linked list structure is used for storing and managing a plurality of state objects in a linked list form, each state object corresponds to one power supply configuration or conversion logic in a multi-power-supply system, the state object comprises a scan method, a just method and an action method; the scheduling algorithm module is configured to recursively call a scan method of a current state object from a top layer state to traverse a sub-state chain table of the current state object; for each traversed state object, calling a Judge method of the state object to judge whether the current external condition meets a preset conversion condition or not; if yes, the action method is called to execute corresponding power switching operation. The risk of errors caused by logic modification in the later period is effectively reduced, meanwhile, the workload in the test stage is remarkably reduced, and stable and reliable operation of the system is guaranteed.

The invention provides a VCV take-up and pay-off rack automatic switching system and method, and relates to the technical field of equipment control in a high-voltage cable crosslinking process, and the system comprises a main control electric cabinet and a human-computer interaction interface; the main control electric cabinet is integrated with a dual-power switch, an intermediate relay group arranged in an M * N matrix and a PLC (Programmable Logic Controller); the man-machine interaction interface is provided with M * N groups of switching buttons and corresponding indicating lamps, and is used for operating instruction input and state monitoring; wherein the PLC realizes the dynamic matching of any VCV production line and any take-up and pay-off rack by controlling the on-off of a coil of the intermediate relay, and only allows a single production line to establish exclusive connection with a single take-up and pay-off rack. According to the invention, the PLC controls the M * N matrix relay to realize automatic switching, manual wire dismounting and wiring are replaced, and the switching time is shortened from half a day to a minute level; according to fool-proof and interlocking logic, wiring error shutdown is avoided, dual-power redundancy and manual forced switching are reliable, a reserved slot supports production line capacity expansion, and efficiency and stability are improved.

A fuel gas-fuel oil automatic switching system, comprising an electronic injection valve (1), a fuel gas control valve (2) and an engine (3); the electronic injection valve (1) is mounted on the engine (3), and the electronic injection valve (1) comprises a valve body (11), an electronic controller (12) and a fuel oil injection nozzle (13), the electronic controller (12) and the fuel oil injection nozzle (13) being arranged on the valve body (11), and the fuel oil injection nozzle (13) supplying oil to the engine (3); the fuel gas control valve (2) is communicated with the engine (3) via a pipe and supplies gas to the engine (3); the fuel gas control valve (2) is provided with a pressure sensor (21), the pressure sensor (21) being electrically connected to the electronic controller (12); the pressure sensor (21) measures the fuel gas pressure and transmitting a fuel gas pressure signal to the electronic controller (12); the electronic controller (12) automatically controls the opening and closing of the fuel gas control valve (2) and the electronic injection valve (1) on the basis of the fuel gas pressure signal. The system is used for improving the intelligence and convenience of fuel gas and fuel oil switching.