52results about How to "Quick protection" patented technology

The invention discloses a high-frequency harmonic protection method and system for a flexible DC system, and the method comprises the steps: obtaining the AC voltage of a grid-connected point of the flexible DC system, and calculating the high-frequency harmonic component of the grid-connected point according to the AC voltage; obtaining the harmonic current of the valve side of the connection transformer of the flexible direct current system, and calculating the high-frequency harmonic component of the connection transformer according to the harmonic current; acquiring a bridge arm current of a bridge arm reactor of the flexible direct current system, and calculating a high-frequency harmonic component of the reactor according to the bridge arm current; and executing a protection instruction according to the grid connection point high-frequency harmonic component, the connection transformer high-frequency harmonic component and the reactor high-frequency harmonic component. By adopting the embodiment of the invention, high-frequency harmonic equivalence can be carried out on the grid connection point of the flexible direct current system, the valve side of the connection transformer and the key position of the bridge arm so as to realize rapid and reliable protection of key equipment, prevent harmonic waves of each frequency from exceeding the endurance capability of the equipment, ensure the safety of core equipment and the flexible direct current system and improve the reliability of the equipment. And the overall operation reliability of the flexible direct current system is improved.

The invention relates to the field of road traffic informatization, in particular to a road traffic informatization anti-collision guardrail which comprises a supporting base, and locking ground feet are fixedly connected to the outer side of the bottom end of the supporting base; a connecting seat; the movable force unloading unit is arranged between the connecting seat and the supporting base, is positioned on the inner side of the supporting base and is connected with the connecting seat; the anti-collision protection unit is connected with the connecting seat; the plug-in type connecting units are arranged on the two sides of the connecting base and fixedly connected with the connecting base. Wherein the anti-collision protection unit comprises an energy absorption protection assembly, a buffering assembly, a self-adaptive energy supply assembly and an induction type guardrail assembly, through the arrangement of the anti-collision protection unit, impact force generated when a vehicle head or a vehicle body collides can be subjected to multiple buffering, and the vehicle can be prevented from rolling over after collision; and the connecting seat can move and turn over after collision, secondary buffering is achieved, and the situation that a large number of guardrail plates are broken due to collision is avoided.

The invention discloses an integrated control system for electric modification of an electric tractor, and belongs to the technical field of agricultural machinery. The system comprises a signal processing module, a health state evaluation module, a control decision module, an execution module and an optimization module, all the modules realize data interaction through the Ethernet, and the system is adaptive to heterogeneous hardware integration requirements after electric modification of a traditional fuel tractor. According to the invention, the health state evaluation module and the prediction model realize quick response and graded protection of high-voltage insulation, battery overheating and actuator fault scenes through clear quantification, and realize quantitative scoring of the health degree in the limitation of temperature, load and attitude coupling complex scenes; meanwhile, the time domain and frequency domain characteristics of the signals are extracted to provide a quantitative basis for evaluation, different actions of power reduction, speed limiting and emergency shutdown are triggered according to the health degree state, the situation that operation efficiency is affected by excessive protection is avoided, early warning can be conducted in the early stage of a fault, rapid protection can be conducted when the fault occurs, and the running safety and reliability of the tractor are improved.

The utility model discloses a traffic signal controller, and belongs to the technical field of electronics. The traffic signal controller comprises a lamp control circuit, a current acquisition circuit and a controller. A power supply end of the lamp control circuit is used for being connected with a lamp control power supply, a control end is connected with a first output end of the controller, an output end is connected with a target signal lamp, the lamp control circuit is used for conducting or disconnecting according to a signal lamp operation scheme so as to lighten or extinguish the target signal lamp, and the target signal lamp is a signal lamp of any color in traffic signal lamps; the acquisition end of the current acquisition circuit is connected with the output end of the lamp control circuit, the output end is connected with the input end of the controller, and the current acquisition circuit is used for acquiring current flowing through the target signal lamp; the controller is used for switching off the lamp control circuit after determining that the target signal lamp breaks down based on the current collected by the current collection circuit. According to the invention, when the target signal lamp breaks down, the power supply line of the target signal lamp can be quickly cut off, so that the traffic signal controller is effectively protected.

This utility model relates to the field of automatic power-off protection technology for leakage current, and discloses an automatic power-off protection device for urban lighting based on an RTU (Remote Current Detection Unit). The device includes a control box, an RTU module fixedly connected inside the control box, a leakage current detection module fixedly connected inside the control box, and a power-off protection module fixedly connected inside the control box. The power-off protection module has a protection mechanism inside, and the control box has a disassembly mechanism. The protection mechanism includes a torsion spring, and an insulating block is fixedly connected to the left side of the outer wall of the torsion spring. In this utility model, the leakage current detection module monitors urban lighting in real time, achieving rapid response and precise protection against leakage current hazards. Once an excessive leakage current is detected, the protection mechanism in the power-off protection module can instantly cut off the circuit, preventing safety accidents caused by leakage current and greatly improving the safety of urban lighting.

The invention relates to the technical field of concrete, in particular to repair mortar for hydraulic structure concrete, the repair mortar comprises mortar A and mortar B which are mixed together, the mortar A comprises a first modifier, first glass yarn and first elastic polyurethane; the mortar B comprises the following components: a second modifier, second glass yarn, glass powder, crystal whiskers, calcium carbonate, nano silicon dioxide and second elastic polyurethane, and the particle size of the first glass yarn is greater than that of the second glass yarn. The mortar is different from a single flexible or rigid protective repairing material, has excellent flexibility and can meet certain strength requirements, protection can be quickly formed during repairing, the mortar reaches the technical index 12 hours after the repairing mortar is laid and flattened, the repairing time is remarkably shortened, and the repairing effect is remarkably improved.

The utility model relates to the technical field of garden drill and discloses a portable garden drill for planting, which comprises a drill handle, a fixing plate is installed on the upper surface of the drill handle through a drill bolt, the upper surface of the fixing plate is provided with a gasoline engine, a protection plate, a clamping assembly, a protective cover and a drill sliding block, and the utility model has a reasonable structure, the clamping rod is opened on one side of the clamping seat by rotating the clamping bolt, the protective cover is sleeved on the drill bit and placed into the clamping seat, the clamping rod and the clamping seat are rotated to clamp and fix the protective cover by rotating the clamping bolt, the drill bit is quickly protected and prevented from being damaged, the use of the drill bit is not affected by the damage caused by the bumping of the drill bit during the transportation in inappropriate conditions, the worker is not damaged by the bumping of the drill bit during the transportation, the gasoline engine is installed on and removed from the drill handle by rotating the drill bolt, the clamping assembly is installed under and removed from the protection plate by rotating the mounting bolt, and the gasoline engine and the clamping assembly and other components are quickly removed for repair and replacement.

The invention provides a radio frequency driving device and a radio frequency power supply system. The radio frequency driving device comprises an input end, an output end, N radio frequency driving units and a gating unit, the N radio frequency driving units are connected in parallel between the input end and the gating unit, the gating unit is connected between the N radio frequency driving units and the output end, the input end is used for being connected with a direct-current power supply, and the output end is used for being connected with the radio frequency generating device; wherein each radio frequency driving unit is used for receiving direct-current electric energy output by the direct-current power supply through the input end and converting the direct-current electric energy into target electric energy. The gating unit is used for selectively conducting connection between one target radio frequency driving unit and the output end, so that target electric energy generated by the target radio frequency driving unit is output to the radio frequency generation device through the output end. Wherein the voltage values of the target electric energy generated by the N radio frequency driving units are different from each other. According to the invention, the radio frequency generation device can be protected.

This utility model discloses a safety container device for emergency handling of hazardous chemicals, including a safety container. The safety container includes a container body and a lid detachably mounted on the container body, and also includes an elastic guide positioning mechanism fixedly mounted inside the container body. The elastic guide positioning mechanism includes several cylinder pressure rollers, each cylinder pressure roller rotatably connected to an elastic pressure arm with an adjustable angle. A spring structure is installed on each elastic pressure arm, which tensions and presses the cylinder pressure rollers against the cylinder through the spring structure. This structure effectively increases the safety of emergency handling of leaking hazardous chemical cylinders, enabling immediate and safe emergency handling of hazardous chemical leaks.

The invention provides a multi-axis moving type linear manipulator and relates to the technical field of multi-axis moving manipulators, the multi-axis moving type linear manipulator comprises a supporting frame, a driving air cylinder and a clamping jaw body, a longitudinal axis moving module is mounted at the upper end of the supporting frame, a transverse axis moving module is mounted on the surface of the upper end of the longitudinal axis moving module, and a mounting plate is mounted on the surface of the transverse axis moving module; the output end of the driving cylinder is fixedly connected with the upper end of the clamping jaw body, the driving cylinder is arranged on the surface of the mounting plate, and a rotating mechanism is arranged at the position, corresponding to the driving cylinder, of the surface of the mounting plate and comprises a rotating column. According to the multi-axis moving linear manipulator, the problems that in the using process of the multi-axis moving linear manipulator, due to the fact that a common manipulator horizontally moves by means of an axis moving module, when part of irregular parts are subjected to clamping and limiting operation, the manipulator is inconvenient to adjust and control at the corresponding angle, and the working efficiency of the manipulator is affected are solved. And therefore, the multi-axis moving manipulator cannot be effectively regulated and controlled for use.

The invention discloses an ultra-fast protection method for a distributed control system, the system adopts a star-shaped connection topological structure, a main node unit comprises an MCU unit and a main FPGA unit, the main node unit comprises an MCU unit and a main FPGA unit, and the MCU unit and the main FPGA unit are connected with each other. The main FPGA unit comprises a communication coding protection processing unit, a data interaction unit, a protection configuration unit, a protection output unit and a multi-path main communication interface; the system can comprise a plurality of slave node units, and each slave node unit comprises a slave FPGA unit and a slave communication interface corresponding to the master communication interface. According to the invention, the original communication channel in the distributed control system is utilized, the whole system is protected more quickly in real time through the design of a communication protocol and a protection strategy, and when any node in the distributed control system fails, the super-fast protection of the whole system is realized, and further expansion of the failure is avoided. Meanwhile, the control method can be flexibly adjusted according to different application requirements, balance between rapid protection and high availability is achieved, and therefore the control method has wider applicability.

The invention relates to the technical field of photovoltaic systems, discloses a long-service-life tracking type photovoltaic system, and solves the problems that a photovoltaic panel of an existing photovoltaic system cannot automatically track the sun irradiation angle for angle adjustment, and the photovoltaic panel is easily damaged in severe weather due to the fact that the photovoltaic panel is exposed outside for a long time. The device comprises a protection box, a mounting frame is arranged on the upper portion of the protection box, a first rotating rod is rotatably mounted on the upper portion of the interior of the mounting frame through two second shaft seats, protection plates are arranged on the two sides of the protection box, first fixing sleeves are fixedly mounted at the two ends of the surface of the first rotating rod, and supporting blocks are fixedly mounted on the surfaces of the two first fixing sleeves; a photovoltaic panel is fixedly mounted between the bottoms of the two supporting blocks; the photovoltaic panel of the photovoltaic system can automatically track the sun irradiation angle for angle adjustment, the power generation efficiency is improved, the photovoltaic panel can be folded for protection in severe weather, and the service life of the photovoltaic panel is prolonged.

The present invention discloses a short-circuit fast protection circuit and chip for high-voltage LDO, wherein the LDO includes an error amplifier, a power tube, and a voltage feedback module; the circuit includes: a sampling module and a shutdown module; the sampling module is respectively connected to the error amplifier and the power tube, and is used to monitor the current flowing through the power tube, and output a shutdown trigger signal to the shutdown module when the current exceeds a set value; the shutdown module is respectively connected to the sampling module and the power tube, and is used to shut down the power tube according to the shutdown trigger signal. By using the protection circuit of the present invention, the LDO can be quickly responded to when the output end of the LDO is short-circuited to protect the LDO, thereby preventing the chip from being damaged by a large current.

The application provides an oil bubble discharge experiment platform comprising an optical diagnosis system, realizes quantitative research on bubble discharge characteristics of transformer oil under different parameters, and can observe clear images in a bubble discharge process, and the experiment platform comprises: a power supply system for power supply, wherein the power supply system comprises a test transformer, a protection resistor and a fast protection module; an experiment cavity for containing transformer oil; an electrode system installed in the experiment cavity and used for constructing a uniform electric field oil gap or a non-uniform electric field oil gap; a bubble generating system used for adding bubbles to the oil gap; a partial discharge detection system used for collecting partial discharge signals and analysis; and an optical diagnosis system used for observing the bubble discharge process of the oil gap in the experiment cavity; wherein the partial discharge detection system is further connected with the fast protection module, and is used for outputting signals to the fast protection module when a discharge or breakdown event occurs, so that the power supply system is cut off by the fast protection module.

The application discloses a kind of power battery edge fills edge and examines health evaluation and risk early warning method and system.Intermediate equipment is arranged in the direct current charging loop between charger and battery pack, built-in power MOS tube control loop, synchronous evaluation when charging, actively cut off when high risk, realize " edge fills edge and examines edge protection ".Method realizes early warning by electrical baseline acquisition, controllable MOS direct current load applies current step, direct current impedance online calculation, fixed-frequency 1KHz alternating current impedance detection, communication data monitoring and analysis, charging curve monitoring and multi-dimensional fusion evaluation.System includes power loop control, sampling, load, impedance detection, communication, main control.The application adds active protection type direct current monitoring node between charger and battery, does not disassemble battery to complete edge fills edge and examines synchronously, meets the requirement of alternating current internal resistance detection in " lithium ion battery for electric bicycle Health Evaluation Working Guide", realizes the online evaluation of battery health, BMS and charging interface safety.

The utility model discloses a finished glass product quality detection tool which comprises a workbench and a machine body installed at the upper end of the workbench, a transparent plate is embedded in the outer wall of the front end of the machine body, a limiting strip is arranged on the front side of the transparent plate so as to lift a finished glass product to be detected, and a scanner is arranged on the rear side of the transparent plate and is used for scanning the finished glass product to be detected. A scanner is arranged in the machine body to scan the size of a glass finished product and emit light, an information processing device is arranged in the machine body to process data scanned by the scanner, a controller is fixedly connected to the outer wall of the front end of the workbench, impact force during falling is adsorbed by installing a sponge mat, the damage and scratch risks caused by falling are reduced, and the service life of the glass finished product is prolonged. By reducing the loss caused by falling of the glass finished product, an operator can continue subsequent work more quickly, so that the overall working efficiency is improved, the production period is shortened, meanwhile, the operator can be more relieved, and the glass finished product can be protected quickly.

The application relates to the technical field of stepping motor control, and discloses a current signal acquisition circuit, a method and a stepping motor. The circuit comprises a current detection module, an overcurrent detection module and a reference voltage module; the current detection module is connected in series at the low side of a corresponding driving circuit of the stepping motor, acquires and amplifies a first current signal corresponding to the low side, detects the first current signal and outputs a motor current detection signal; the overcurrent detection module is connected in series at the high side of the driving circuit, acquires a second current signal corresponding to the high side and outputs a corresponding motor fault protection signal; the reference voltage module is connected to the current detection module and the overcurrent detection module respectively, provides a reference voltage for the current detection module and provides a standard driving voltage for the overcurrent detection module. By independently arranging the low-side current detection module and the high-side overcurrent detection module, the inherent contradiction between low-side sampling without protection and high-side sampling with high cost in the prior art is broken, and low-cost design is realized.

This invention relates to the field of marine electrical safety technology, specifically to a high-voltage leakage current protection system for marine propulsion systems. The system includes a dynamic leakage current detection module, a signal processing and control module, a rapid power-off execution module, an environmental adaptability module, and an alarm module. The dynamic leakage current detection module is used to collect the current difference signal, insulation resistance signal, and auxiliary signals of the leakage current protection system in real time. The signal processing and control module is connected to the dynamic leakage current detection module and is used to run a dynamic leakage current detection algorithm to analyze the current difference signal and insulation resistance signal. This invention significantly improves the accuracy and reliability of leakage current detection by setting up dual-channel monitoring and a dynamic threshold algorithm. Combined with rapid power-off and intelligent humidity compensation strategies, it effectively reduces unnecessary downtime and improves system operating efficiency while ensuring safety.

A resonant conversion circuit disclosed by the present invention comprises a resonant branch, a switch unit and a rectification unit, an input power supply is connected to an input port of the switch unit to supply power to the resonant conversion circuit, the switch unit, the resonant branch and the rectification unit are connected in parallel, and an output end of the rectification unit is connected with a load. The resonant conversion circuit further comprises a resonant current detection module, the input end of the resonant current detection module is connected with the resonant branch, the resonant current detection module is used for detecting resonant current in the resonant branch, and the resonant current detection module outputs first voltage. And the excitation current detection module is used for detecting excitation current in the resonance branch, the excitation current detection module outputs second voltage, and the output end of the excitation current detection module is connected with the output end of the resonance current detection circuit in parallel and outputs third voltage. According to the invention, no extra loss is caused, the number of required peripheral devices is small, and the efficiency and the power density of the system can be improved; and the post-stage rectification circuit can be used for current reporting and zero crossing point detection.

The invention discloses a waterproof and dustproof padlock which comprises a lock body, the lock body is provided with a mounting plane, and a mounting channel penetrating through the mounting plane is formed in the lock body; the lock cylinder is arranged in the mounting channel and does not protrude out of the mounting plane, and a key hole of the lock cylinder is exposed through the mounting channel; the surface cover has the length direction, one end of the surface cover is rotationally arranged on the lock body through a pivot shaft perpendicular to the mounting plane, and a quick dismounting and mounting assembly is arranged between the other end of the surface cover and the lock body; and the sealing piece is arranged on the surface cover and can abut against the mounting plane and seal the port of the mounting channel. When the padlock is not unlocked, the face cover is used for shielding the key hole of the lock cylinder, the face cover is fixed to the lock body through the quick dismounting and mounting assembly so that the sealing piece can seal the end opening of the mounting channel, water or dust can be prevented from entering the lock cylinder from the key hole, the face cover can be rotated till the key hole is exposed when the padlock needs to be unlocked, the lock cylinder can be quickly protected, and the safety of the padlock is improved. The waterproof and dustproof effects are achieved, and long-time normal use of the padlock is guaranteed.

The utility model belongs to the technical field of corrosion prevention of building walls, and particularly relates to a chemical plant area building wall corrosion prevention structure which comprises frame rods arranged side by side up and down, a building wall is arranged between the frame rods in a spliced mode, and a protection mechanism is arranged at one end of the side face of each frame rod and comprises a first fixing rod, an end rod, a rotating roller and a protection film roll. End rods are arranged at the upper end and the lower end of the side, away from the frame rod, of the first fixing rod. The protective film roll is pulled, the protective film roll drives the rotating roller to rotate, the protective film roll is unwound according to the total length of the building wall, and then the upper side and the lower side of the side, close to the building wall, of the protective film roll are attached to the surface of the building wall through glue joint. And the protective film roll is directly torn down, and then the pressing and clamping mechanism is released again to carry out protection arrangement on the surface of the building wall, so that the building wall can be protected.

The utility model relates to the technical field of engine accessory detection, and discloses an engine accessory hardness detection device which comprises a hardness detector, a lifting platform and a base, the base is located at the bottom of the front side of the hardness detector, and the lifting platform is located at the top of the base and electrically connected with the hardness detector; the left side and the right side of the hardness detector are each provided with a protection mechanism used in cooperation with the hardness detector. Lifting mechanisms used in cooperation with the protection mechanisms are arranged on the left side and the right side of the hardness detector correspondingly. The device solves the problems that in the process of detecting the engine parts through a hardness detector, the engine parts are likely to sputter to the periphery and jump out if the hardness of the engine parts is not enough, and the hardness detector is not provided with an assembly capable of intercepting and protecting the sputter engine parts, so that certain potential safety hazards exist, and the reliability of the engine parts is improved. Therefore, the use safety of the hardness detector is reduced.

The utility model is suitable for the technical field of face recognition all-in-one machines, and provides a face recognition all-in-one machine protection structure assembly which comprises a fixing column, a camera used for collecting and recognizing data is installed on the outer wall of the top end of the fixing column, and a display screen used for displaying the data is installed on the outer wall of the fixing column. The protection mechanism is mounted on the outer wall of the display screen and used for protecting the display screen; the protection mechanism comprises a limiting unit and an adjusting unit; and the adjusting unit is used for adapting to display screens with different sizes. By arranging the protection mechanism, the protection plate can be used for rapidly protecting the screen when the screen is not used, the installation frame can be conveniently connected to the outer walls of display screens of different sizes in a sleeving mode through cooperation of the installation frame, the guide rod and the sleeve, the application range of the product is widened, installation and disassembly are convenient, and the practicability is high. And the working efficiency is further improved.

The invention relates to the field of switching converter design, and discloses a control method of an asymmetric half-bridge flyback converter. A clock signal is arranged on the secondary side of the converter, a primary side excitation current signal is simulated in real time, a driving control signal of a primary side switch tube is generated on the secondary side according to the clock signal and the simulated excitation current signal, and the driving control signal is transmitted to the primary side through a high-reliability signal isolator. According to the asymmetric half-bridge flyback converter, on and off of a primary side switching tube are controlled, output voltage stabilization and primary side peak current control are achieved, the problems that an existing optocoupler feedback control scheme is low in reliability, and output protection is not timely and accurate enough are effectively solved, and the asymmetric half-bridge flyback converter has higher reliability, better output protection performance and smaller size; and the application occasions of high reliability, high performance and small size can be simultaneously met.

The invention discloses a method and a system for realizing channel protection based on software logic. The method comprises the following steps: acquiring a local service table and a relay service table of equipment by utilizing a main controller; monitoring abnormal information of a channel link, querying a local service table and a relay service table by the main controller according to the abnormal information, and executing corresponding actions; and after the controller executes a corresponding action, the main controller revises the local service table and the relay service table according to an action execution result. Through logic operation of upper software, 1 + 1 protection is carried out on a communication channel under the condition of not depending on line code editing, channel services are effectively isolated, the universality and flexibility of protection are improved, meanwhile, the control process and table content are optimized, the overall performance of the scheme is ensured, and the method is suitable for popularization and application. Therefore, rapid and stable channel service protection can be realized in various service scenes.

The utility model discloses a lightning protection detection and protection circuit and an electric energy conversion device, and belongs to the technical field of lightning protection, the lightning protection detection and protection circuit comprises a first capacitor, a first resistor, a first diode and a first comparator, the first end of the first capacitor is connected with the positive end of a bus, and the second end of the first capacitor is connected with the first end of the first resistor; the second end of the first resistor is grounded, the second end of the first capacitor is connected with the anode of the first diode, the cathode of the first diode is connected with a power supply, the anode of the first diode is connected with the first input end of the first comparator, and the second input end of the first comparator is grounded through reference voltage. According to the lightning protection detection and protection circuit and the electric energy conversion device, lightning stroke can be detected before bus overvoltage is formed by lightning stroke, and rapid, timely and effective protection is formed.

The invention discloses an intelligent monitoring method and system for a new energy intelligent station, and relates to the technical field of new energy station monitoring. The method comprises the following steps: an intelligent edge gateway of an edge node layer acquires multi-modal original data of heterogeneous equipment through a multi-protocol adaptation module; after the edge computing power module executes data cleaning, a real-time AI model is called according to the data type to generate an analysis result through reasoning; the key data is uploaded to a cloud platform layer through a key data channel; and if the result is a fault alarm, the cloud global task scheduling center is triggered to redistribute a calculation task, and the security policy center generates a reinforcement policy and issues a task instruction and a security policy to the edge node layer through the key channel. The technical problems that heterogeneous devices in the new energy station are difficult to access uniformly, data processing delay is large, and fault response is not appropriate are solved, and the technical effect that the stability and maintainability of the whole new energy intelligent station are improved through cooperative work of the intelligent edge gateway and the cloud platform is achieved.

The utility model relates to the technical field of geological disaster monitoring, and discloses a protection device for a geological disaster monitoring facility in a narrow space, which comprises a bottom plate and a plurality of long rods, the opposite sides of two long rods are fixedly connected with a plurality of transverse columns, the two ends of each long rod are fixedly connected with connecting blocks, and the connecting blocks are fixedly connected with the bottom plate. Wherein a motor is fixedly connected to the inner wall of one connecting block, a lead screw is fixedly connected to the output end of the motor, sliding blocks are slidably connected to the inner walls of the long rods, traction rods are fixedly connected to the opposite sides of the two sliding blocks, a protective curtain is arranged on the outer walls of the traction rods, and an opening and closing assembly is arranged at the top end of the bottom plate. According to the utility model, the motor drives the screw rod to rotate, and the screw rod drives the draw bar which drags the protective curtain to slide, so that the protective device can quickly protect the monitoring assembly below in time when rainfall and rockfall occur, the protective curtain is ensured to be reset and rolled through the stress of the coil spring, and the flexibility of the protective assembly is ensured.