42results about How to "Realize active control" patented technology

The invention discloses a multi-sensor fusion inspection robot, and relates to the field of inspection robots. Comprising a vehicle body and an information terminal used for receiving collected information and controlling the vehicle body to move, an information processing unit and a signal transmission unit are arranged in the vehicle body, the vehicle body is further provided with an information collection unit, and the information collection unit comprises a route information collection unit and an environment information collection unit; wherein the vehicle body moves along the inspection moving route, and the inspection environment information is collected in the moving process; the control mode of the moving process of the vehicle body comprises the steps that control is conducted through the Raspberry Pi with pre-stored routing inspection moving route map information; manual remote control; active control; in the active control mode, the route information collecting unit collects inspection moving route information and sends the inspection moving route information to the information processing unit, the information processing unit generates a control instruction for driving the vehicle body to move, and the vehicle body moves along the inspection moving route in response to the control instruction.

The invention discloses an adaptive power control method for a duplex-winding induction generator system, and belongs to the technical field of generator control. The double-winding induction generator system is composed of a double-winding induction generator, an energy storage unit, a static excitation converter and a diesel engine. According to the self-adaptive power control method, control winding current is decoupled into excitation control and electromagnetic torque control through coordinate transformation based on rotor flux linkage orientation, independent adjustment of output power of the generator is achieved, passive regulation and control of power of an energy storage unit are achieved through control of electromagnetic torque of the generator, and the self-adaptive power control method is achieved. The problem that the control freedom degree of a single converter system is insufficient is solved. Besides, according to the control method adopted by the invention, a dynamic planning-based generator / energy storage unit power distribution strategy with minimum fuel loss as a target is adopted, so that the generator is ensured to always work in a high-efficiency interval of the diesel engine within a wide load change range, and the power generation cost is remarkably reduced.

The invention designs a linear heave compensation device based on a double-piston double-rod type energy accumulator, which belongs to the technical field of ocean engineering equipment, adopts the double-piston double-rod type energy accumulator as a coupling device of compensation power, is provided with a plurality of functional cavities, and connects a high-pressure gas cylinder group with a passive compensation gas cavity of the double-piston double-rod type energy accumulator to form a high-pressure gas cylinder group. Therefore, a passive compensation force is provided on the piston rod of the energy accumulator; the two-way variable pump is connected with two active compensation liquid cavities of the energy accumulator, active compensation force capable of controlling the magnitude and the direction is provided on a piston rod of the energy accumulator through a closed variable pump speed control and regulation loop, the passive compensation force and the active compensation force jointly overcome the load of the energy accumulator, and the piston rod of the energy accumulator is driven to move. And finally, the compensation cylinder is indirectly driven to realize a heave compensation function. In addition, the deepwater high-pressure environment pressure acts on the end portions of the energy accumulator load pressure liquid cavity piston rod and the compensation cylinder piston rod at the same time, and the deepwater pressure compensation function is achieved through pressure interaction offset. According to the invention, a plurality of operation modes and functions such as passive compensation, active compensation and water pressure compensation are realized, operation under different working conditions such as overwater, underwater and deepwater areas can be realized, and the device has the characteristics of novel structure, compact system, integration of multiple functions, high compensation precision and the like.

The invention relates to a tunnel secondary lining concrete filling state real-time monitoring system which is characterized in that a secondary lining cavity is defined by a secondary lining template in a tunnel, the system comprises a sensor array located in the secondary lining cavity, the sensor array comprises a plurality of rows of optoelectronic switches distributed in the extending direction of the tunnel, and the optoelectronic switches in the same row are distributed in the circumferential direction of the tunnel; the signal processing and acquisition unit is responsible for supplying power to the photoelectric switch and converting the received signal of the photoelectric switch into a signal displayed by a display; and the data processing and displaying unit is responsible for displaying the signals transmitted by the signal processing and collecting unit on a reality device. The invention aims to provide the tunnel secondary lining concrete filling state real-time monitoring system capable of acquiring the cavity in real time, and the problem that the existing cavity can only be acquired afterwards is solved.

The application discloses a gas turbine, a gas turbine blade and a leaf-shaped film cooling hole structure of the gas turbine blade. The existing traditional cylindrical film cooling hole is reshaped into a leaf-shaped structure including a left half circular arc, a right upper half elliptical arc, a right middle half elliptical arc and a right lower half elliptical arc, so that the cooling gas can be divided into three paths when being sprayed out of the hole, and is sprayed out along the passage secondary flow same direction, the film hole center line direction and the passage secondary flow opposite direction respectively, thereby the blowing-off effect of the passage secondary flow on the cooling film is inhibited, the wall-attaching ability and the along-flow development ability of the cooling film are enhanced, the covering uniformity of the cooling film on the base surface is improved, and the cooling efficiency and the service life of the blade are improved. The leaf-shaped film cooling hole structure has the characteristics of strong functionality and wide applicability, and can be widely applied to the cooling technical field of the gas turbine blade of an aero-engine or a ground gas turbine.

According to the variable-flow IGBT evaporative cooling system and the control method provided by the invention, dryness online calculation and closed-loop control based on pressure and density signals are introduced into the IGBT evaporative cooling system, so that accurate sensing and active regulation and control of a phase change state of a cooling medium are realized; therefore, it is ensured that the IGBT module is always in a gas-liquid mixing environment with the optimal heat exchange efficiency, the efficient heat dissipation capacity of phase change latent heat is fully utilized, local overheating or temperature fluctuation caused by excessive evaporation or insufficient liquid phase is avoided, the heat dissipation uniformity, stability and energy efficiency are fundamentally improved, and the heat dissipation efficiency is improved. The self-adaptive capacity of the system to different load working conditions is enhanced, and the guarantee is provided for long-term reliable operation and service life prolonging of the IGBT module through direct control over the key state quantity of dryness.

This invention belongs to the field of precision machining technology, and discloses a structured contact wheel belt grinding device and control method with flow pressure regulation. It has the function of grinding structured surfaces of various sizes with the same structure, including a support structure and a structured surface grinding actuator. The support structure includes a base plate, ribs, a motor fixing component, and an electric actuator support. The structured surface grinding actuator includes a drive motor, a motor connecting shaft, a drive wheel, a sanding belt, a tension wheel, a tension wheel bracket, a tension wheel bracket fixing component, a guide wheel assembly, a guide wheel assembly bracket, an electric actuator, a force sensor mounting flange, a force sensor, a contact wheel frame fixing component, a contact wheel frame, a structured contact wheel, a ring clamp, hydraulic oil lines, and an electro-hydraulic servo valve. This invention is mainly used for structured surface belt grinding. It adjusts the hydraulic system loading parameters according to the real-time changes in grinding force during the grinding process to control the internal flow pressure of the structured contact wheel, thereby meeting the stable processing requirements of structured surfaces of different sizes.

The utility model relates to unmanned aerial vehicle detection technical field especially, it relates to a steel structure unmanned aerial vehicle detection device, including detection platform, the surface of detection platform places unmanned aerial vehicle, the surface fixed connection of unmanned aerial vehicle has detection device, the inside buffering assembly of detection platform is provided with, buffering assembly includes device groove, the utility model discloses through the setting of detection platform and buffering assembly, when unmanned aerial vehicle landing, its impact kinetic energy can drive landing plate compression first spring to high -efficiently convert the elastic potential energy of spring for the impact force, realize smooth buffering, this process can effectively attenuate the instantaneous impact that unmanned aerial vehicle and detection device bear, greatly promoted the landing security, after the end of buffering, the device can lock quickly, provides a stable rigid platform for subsequent detection task.

The invention discloses a TBM double-track tunnel trackless transportation cross-line bypassing cushion layer rapid construction method, and belongs to the technical field of tunnel construction. According to the method, a construction area is divided into a plurality of construction sections in the longitudinal direction of a tunnel, construction and transport vehicle framing and side alternate operation is organized, and parallel cushion layer pouring and trackless transport are achieved; the method comprises the following steps of: performing radar detection and scabbling treatment on the top surface of an inverted arch block during construction preparation; installing a steel plate water stop belt, and penetrating through the ground beam and the drainage blind pipe; a detachable steel pipe is adopted for shaping and constructing a cushion drainage ditch; after a reinforcing mesh is laid, concrete pouring, multi-pass surface finishing, steam and heat preservation curing and temperature and humidity monitoring are conducted; by optimizing the construction organization and technology, the problems that transportation is interrupted, the construction period is long and cracking is prone to occurring in a traditional method are solved, efficient, high-quality and low-interference cushion layer construction is achieved, optimal construction parameters can be scientifically screened by setting a contrast test section, and adaptability is high.

The invention relates to a water jet tunneling method suitable for a five-center dome structure tunnel. The water jet tunneling method comprises the following steps that S1, a jet cutting pre-experiment of a cutting area under a tunnel face is carried out according to tunnel design; s2, measuring the cutting depth D under different jet parameters; s3, according to the cutting depth D, cutting parameters are determined, and a cutting circuit diagram is designed based on the cutting parameters; s4, cutting operation is conducted on the lower cutting area according to the cutting circuit diagram; and S5, cutting operation is conducted on the upper cutting area according to the cutting circuit diagram. According to the method, efficient, accurate, safe and reliable tunneling of the tunnel of the five-center circular arch structure is achieved, the construction quality can be improved, adaptability is enhanced, and the construction cost is reduced.

This invention relates to a fixed-point micro-environment control spraying method for bridge bearing maintenance, specifically in the field of bridge maintenance construction. By multimodal fusion perception of the micro-environment on the surface of the bridge bearing, a precise digital state representation is constructed. Based on this, a deep reinforcement learning model is driven to generate optimized spraying parameters. Robustness verification and reinforcement are then performed through digital twin simulation. Finally, a feedforward compensation closed loop based on real-time online detection is introduced in the physical execution, thereby achieving intelligent adaptation and active control of the complex, non-uniform, and dynamically changing micro-environment of the bridge bearing. This ensures that the anti-corrosion coating can still obtain uniform, stable, and highly adhesive film quality under various harsh field conditions, significantly improving the reliability, economy, and long-term protective effectiveness of maintenance operations.

The invention relates to the technical field of surgical robot control, and particularly provides a control method of a main control arm, a program product, electronic equipment and a storage medium. The main control arm comprises a first rotating joint, a second rotating joint and a third rotating joint which are sequentially connected through joint connecting rods. According to the control method of the main control arm, a first motion parameter of a first rotary joint is monitored, and a second motion parameter of a third rotary joint is determined according to the first motion parameter under the condition that the first motion parameter meets a preset deviation condition; and controlling the third rotary joint to move based on the second motion parameter. When the second rotating joint is in the zero position, the rotating axes of the first rotating joint and the third rotating joint are coaxial, and the second motion parameter is determined according to the first motion parameter, so that the possibility of collision between the hand of the user and the joint connecting rod or different joint connecting rods can be reduced, the user operation is smoother, and the user experience is improved. And the user experience in the use process of the main control arm is improved.

The present application belongs to the technical field of intelligent track socket management, and particularly relates to an intelligent track socket reservation control method and system, which comprises the following steps: calculating the node power of a power node, and obtaining the corresponding socket capacity thereof; comparing the node power with the socket capacity to determine the power state; when the power state is a power non-overload state, generating a final operation plan based on the runtime period of an electrical equipment; when the power state is a power overload state, generating a backup scheme based on the delay requirement and delay condition of the electrical equipment, and adjusting the operation plan based on the backup scheme to obtain the final operation plan; the present application solves the problem through intelligent scheduling before the occurrence of power overload, avoids unexpected shutdown, operation interruption and electrical safety risks of the equipment caused by power overload, and improves the operation stability and safety of the power supply system.

The invention discloses a method for achieving additive manufacturing high-temperature alloy grain supernormal coarsening based on seed crystal guided directional recrystallization heat treatment, and relates to a coarsening method for additive manufacturing high-temperature alloy grains. The invention aims to solve the technical problem of insufficient high-temperature creep property caused by small grain size of the existing additive manufacturing nickel-based high-temperature alloy. According to the method, the single crystal layer with target orientation, namely the seed crystal, is prepared in the additive manufacturing stage, then the grain boundary of the seed crystal is continuously heated through the electromagnetic induction coil in the subsequent heat treatment, forced recrystallization is carried out by taking the seed crystal as a unique or absolute dominant growth source, namely oriented recrystallization is carried out, so that the growth of other crystal grains is inhibited, and the yield of the product is improved. And finally, an ultra-large grain structure with the seed crystal as the main source is obtained in the additive component, the average grain length of the ultra-large grain structure can be increased by two or more orders of magnitude compared with the original additive state and reaches the millimeter level or even the centimeter level, and the crystal orientation is highly consistent with the preset seed crystal orientation.

The device for controlling the EGR rate comprises a device body, the device body comprises a gas inlet pipeline, a gas exhaust pipeline, an ERG gas outlet pipeline, a gas control valve device and a stepping motor assembly, the gas inlet pipeline, the gas exhaust pipeline and the ERG gas outlet pipeline are of a smooth transition and integrated machining forming structure, the gas inlet pipeline is located at the left end of the gas exhaust pipeline, and the gas control valve device is located at the right end of the gas exhaust pipeline. The ERG gas outlet pipeline is located on the rear side of the joint of the gas inlet pipeline and the exhaust pipeline, the gas control valve device is installed in the gas inlet pipeline and the exhaust pipeline, the stepping motor assembly is installed at the top of the gas inlet pipeline and the top of the exhaust pipeline, the amount of tail gas entering an EGR system is effectively adjusted by accurately adjusting and controlling the angle of a butterfly valve, and therefore accurate control over the EGR rate is achieved. The fuel consumption is reduced; and the carbon emission is reduced. When the engine is in different working states, the position of the butterfly valve is adjusted according to requirements so as to control the amount of waste gas entering the EGR system, and then active control over the EGR rate is achieved.

The utility model discloses spoke end conical sheet adhering equipment which is used for adhering a conical sheet to the end of a spoke and comprises a machine frame, a driving device and a driving device. The adhesion assembly is arranged on the rack and is provided with a placing part and a pressing head; the placing part is suitable for flatly placing the conical sheet; the pressing head is positioned above the placing part and is suitable for reciprocating along a vertical first direction relative to the rack; the displacement assembly is arranged on the rack and is provided with a containing groove and a displacement mechanism; the containing grooves are suitable for containing the spokes and enabling the ends of the spokes to be exposed in the second direction, and the second direction is perpendicular to the first direction. The displacement mechanism drives the spokes to do reciprocating motion in the first direction, so that the spokes are located on the placing parts and adhere to the conical sheets; and the pressing head moves downwards and presses the end part of the spoke after the conical sheet is adhered to the end part of the spoke. According to the adhesion equipment, the conical sheets can be automatically adhered to the ends of the spokes, the production efficiency is improved, and the labor cost is reduced.

The utility model relates to the technical field of wind turbine generator unit, especially a kind of wind turbine generator unit yaw system vibration calibration and stabilizing device, it include: yaw pedestal and vibration calibration mechanism, wherein: yaw pedestal, top is equipped with annular guide rail, annular guide rail inner side wall is opened with tooth slot, multiple guide posts are set at the edge of yaw pedestal with equal angle, guide post top end is connected through crossbeam, displacement sensor is embedded in the middle part of crossbeam;Vibration calibration mechanism includes the sliding block with the sliding fit of annular guide rail, the top of sliding block is fixed with bearing table, and driving motor is installed at the center of bearing table bottom surface, and driving motor output shaft is connected with the driving gear meshing with tooth slot, and bearing table top surface four corners are equipped with damping shock absorber, and damping shock absorber top end is connected with calibration platform, and calibration platform side is fixed with the guide sleeve sliding fit with guide post, and vibration calibration mechanism is installed with stabilizing component;It enhances the overall service life of yaw system, improves wind turbine generator unit running stability.

The application belongs to the technical field of tunnel construction, and discloses a shield tunnel end head thaw settlement control method and a control system. The thaw settlement control method comprises the following steps: S1, multiple thaw settlement compensation points are set in the soil layer below the frozen area of the tunnel end head; S2, multiple bags are respectively buried at the multiple thaw settlement compensation points, and settlement monitoring points are uniformly arranged in the soil layer of the frozen area around each thaw settlement compensation point; S3, the settlement data of the soil layer around the corresponding thaw settlement compensation point is monitored in real time by using each settlement monitoring point; S4, when the monitored settlement data reaches a preset trigger condition, a filling mechanism is controlled to inject filling material into the bag at the corresponding thaw settlement compensation point, so that the bag expands to compensate the surrounding soil layer in situ. The application sets multiple thaw settlement compensation points, and does not need to perform secondary drilling construction after thaw settlement occurs, so that the thaw settlement is actively controlled in advance, and the thaw settlement is accurately controlled.

This invention relates to a plasma processing cavity, comprising: a reaction cavity, wherein a support structure for supporting a substrate is disposed in the reaction cavity; a dielectric window located above the reaction cavity, through which a coil array transmits an electromagnetic field to the reaction cavity; and a coil array comprising at least three ICP excitation coils and a phase-shifting coil for interconnecting the ICP excitation coils, wherein the phase-shifting coils cause the currents of different ICP excitation coils to be connected in opposite phases, and the inter-turn currents of the phase-shifting coils are either in phase or out of phase; the total length of all ICP excitation coils and the phase-shifting coils is nλ, where n is a natural number and λ is the wavelength corresponding to the frequency of the radio frequency transmitter, and the total length is the wire length of the radio frequency feed point and the ground feed point.

The present application belongs to the field of flying shear equipment, and discloses a flying shear post double-head active steel-patting device system and method. The system comprises a flying shear and a steel-patting device. The steel-patting device is arranged on the steel tapping side of the flying shear and comprises a driving mechanism and two symmetrically arranged rotary arms. One end of each rotary arm is hinged to a mounting seat through a rotating shaft, and the other end of each rotary arm is provided with a steel-patting surface. The driving mechanism drives the two rotary arms to rotate synchronously. The steel-patting device cooperates with the shearing action of the flying shear. When the flying shear is shearing, the steel-patting surface of the rotary arm moves downward to exert a downward force on the billet head, so that the billet head moves downward along a preset trajectory and deviates from the steel passage, thereby avoiding the billet head from being brought into the guide groove, ensuring the shearing safety, and ensuring the stable production of the rolling line. The length of the shearing section process equipment is effectively reduced, the investment is reduced, and the production is increased.

This reconstruction structure, based on a transmissive phase discontinuity surface, generates a circularly polarized beam, belonging to the field of beam reconstruction. Traditional optical rotation response and beam direction control techniques typically rely on bulky and complex devices to achieve these functions, which not only limits system integration but also reduces signal processing efficiency. The proposed structure comprises an array of n×n integrated layers, of which n types exist. The first, second, and third metal structural layers have elliptical annular cross-sectional shapes. The rotation angles of the first, second, and third metal structural layers on each type of integrated layer are not identical; these angles are the angles between the major axis of the elliptical annulus and the negative direction. The left-hand or right-hand circularly polarized wave phases of the n integrated layers differ by m° sequentially, and the arrangement range of the left-hand or right-hand circularly polarized wave phases of the n integrated layers is from 0 to 2π. This structure is used to generate a circularly polarized beam.

The invention relates to the technical field of wireless communication and multimedia communication, and discloses a cross-protocol-layer packing optimization method for lightweight image transmission of the Internet of Things and related equipment. According to the method, based on an application layer model, an access layer model and a physical layer model, a cross-layer optimization objective function based on a weighted product form is constructed for three sub-indexes of image quality, time delay and energy consumption; constructing a cross-protocol layer model, and solving by optimizing a cross-layer optimization objective function to obtain an optimal package size and optimal transmitting power; calculating a corresponding optimal quantization step size according to the optimal package size; and the Internet of Things node encodes the acquired lightweight image according to the optimal quantization step size, and sends a generated data packet to a receiver at the optimal transmitting power. The method can be applied to the transmission of the lightweight images of the Internet of Things through the random access network, and achieves the flexible balance and collaborative optimization of the image quality, the time delay and the energy consumption.

This invention provides an impedance-controlled wall-climbing robot and an impedance control method. The impedance-controlled wall-climbing robot includes a wall-adhering device and at least one climbing device. The climbing device drives the wall-adhering device to move on the wall surface. The climbing device includes: a climbing component, which includes climbing wheels; a driving component, which includes an elastic driving element with an elastic hollow area, and is drivenly connected to the climbing wheels through the elastic driving element; and a detection component, at least a portion of which is connected to the driving component and is used to detect the rotation angle of the driving component, and at least another portion of which is connected to the climbing component and is used to detect the rotation angle of the climbing wheels. The angle change of the elastic driving element is determined based on the difference between the detected rotation angle of the driving component and the rotation angle of the climbing wheels. This invention solves the problem of difficulty in determining the operating state of wall-climbing robots in the prior art.

The invention provides an air compressor load rate evaluation method and device and an injection control method and device for an auxiliary pressurization system. The air compressor load rate evaluation method comprises the steps that the state of an air compressor is determined based on the pressure of an air storage tank of a whole vehicle; the states of the air compressor comprise an inflating state, a drying regeneration state and an internal unloading state; when the state of the air compressor is a dry regeneration state, the recent inflation state time and the recent unloading state time of the air compressor are standardized, and the standardized recent inflation state time and the standardized recent unloading state time are obtained; and based on the standardized recent inflation state time and the standardized recent unloading state time, a first load rate of the air compressor in the inflation state and a second load rate of the air compressor in the inner unloading state are determined. According to the method, active control over the load rate of the air compressor is achieved, the reliability and safety of the vehicle in the running process are improved, a large amount of historical data do not need to be stored, and the evaluation efficiency of the air pressure load rate is improved.

The invention relates to a reinforcing method capable of actively controlling deformation for a foundation pit beyond design service life, which comprises the following steps of: calculating the deviation value # imgabs0 # of the edge of the foundation pit, and taking reinforcing measures when the deviation value # imgabs1 # exceeds a limit value; the position, with the largest deformation, of the foundation pit is treated firstly, and an active control deformation support is arranged and comprises a reinforcing horizontal support, a shaping Bailey piece, a bottom constraint beam, a top constraint beam and an assembly type work platform; mounting and reinforcing a horizontal support; the assembly type operation platform is arranged on the upper portion of the top restraint beam, on one hand, support is provided for construction of upper machinery, and on the other hand, the assembly type operation platform serves as an active adjusting device for the foundation pit configuration; an assembly type operation platform is arranged on the operation machine; and reinforcing the existing foundation pit concrete support. According to the method, active control over the foundation pit exceeding the design service life is effectively achieved, and reinforcement and first-aid repair of the foundation pit exceeding the design service life can be achieved by cooperatively matching with a soil discharging device, a water pumping device, a hoisting device and the like in the later period.

The application discloses a longitudinal-vertical control method, system and device for a wheel-legged unmanned platform, and relates to the field of unmanned platform control. The method comprises the following steps: determining an equivalent passive damping system; constructing a longitudinal dynamics system of a wheel-legged system and a vertical dynamics model of the wheel-legged system; respectively acquiring longitudinal key responses and vertical key responses; establishing longitudinal control targets according to the longitudinal key responses; establishing vertical control targets according to the vertical key responses; determining a longitudinal-vertical control target function of the wheel-legged system; determining an active controller based on the longitudinal dynamics system of the wheel-legged system and the vertical dynamics model of the wheel-legged system by using an active control algorithm according to the target function; and equivalently converting the longitudinal active control force and the vertical active control force into joint torque of each wheel leg for control. The application can reduce the vibration negative effect of the unmanned platform caused by large road excitation, and improve the driving safety and stability of the wheel-legged unmanned platform.

This invention discloses a flapping wing structure and aircraft, including a fixed frame, a reciprocating assembly, and flapping wing assemblies. The fixed frame includes a rectangular frame, and the reciprocating assembly can reciprocate along the longitudinal direction of the rectangular frame. Two flapping wing assemblies are symmetrically mounted on opposite sides of the rectangular frame. Each flapping wing assembly includes a flapping wing, a first connecting rod, and a second connecting rod. One end of the first connecting rod is rotatably connected to a side frame of the rectangular frame, and the other end is fixedly connected to the second connecting rod. The second connecting rod and the first connecting rod form an L-shaped structure. One end of the flapping wing passes through the second connecting rod and is fixedly connected to a driven bevel gear. A connecting shaft is rotatably mounted on the first connecting rod, and a driving bevel gear is fixedly mounted at one end of the connecting shaft, meshing with the driven bevel gear. This invention can simultaneously achieve flapping and flipping movements of the wings without requiring additional power, simplifying the drive mechanism.

The utility model relates to a power supply control circuit and power equipment, and the power supply control circuit generates a power-on driving signal through a power-on trigger module according to the switching operation of a power-on switch, and drives a switch module to connect a power supply to a load for supplying power to the load. After the load is powered on, power supply control of the load is controlled by the load through the power supply control circuit, for example, when operation needs to be kept, a keeping signal can be output to the keeping and power-off module, and the keeping and power-off module outputs a power-on driving signal according to the keeping signal to enable the switch module to be kept on; in addition, output of the holding signal can be stopped when power-off is needed, so that the holding and power-off module stops outputting the power-on driving signal to turn off the switch module, active control over power-on and power-off of the load is achieved, and the endurance of the power supply is prolonged.

The utility model relates to a winding device. The winding device comprises an unwinding mechanism, a buffering mechanism, a main driving mechanism, a tension control mechanism and a winding mechanism. The unreeling mechanism unreels a roll material, the roll material passes through the cache mechanism, a first electronic cam in the cache mechanism adjusts the cache length of the roll material, then the roll material passes through the main driving mechanism and the tension control mechanism, and tension control is conducted by a second electronic cam and / or a third electronic cam in the tension control mechanism. And finally, winding at the winding mechanism to form a winding core. According to the invention, active control on tension and active control on speed are realized, the risk that the winding core wrinkles and breaks the belt is reduced, and the winding efficiency is improved.

The application discloses a kind of integrated self-sensing and self-excitation prestressed concrete intelligent beam construction method, belong to bridge prestressed beam construction and monitoring technical field.The present application is to solve the technical problems that the existing prestressed beam construction lacks real-time accurate monitoring, and the prestress loss during service period cannot be actively compensated.The scheme divides the excitation section and lays the Fe-SMA steel strand with built-in electric heating wire and stress FBG sensor, converts the real-time stress value using temperature correction, establishes the basic prestress after concrete curing through pre-tensioning, heats to 85~90% of the design stress value at full power with the upper limit of the phase change temperature during the construction period, and then stabilizes and fine-tunes to the design value through residual heat and short-time pulse, and if the loss exceeds the threshold during the service period, it will be heated and excited again to compensate.The application is used to realize real-time sensing, accurate application and dynamic compensation during the whole process of prestressed beam construction, and improve the long-term service safety and durability.