5167 results about "Tower crane" patented technology

The invention discloses a panorama-visible and controllable intelligent monitoring and protecting integrated system for a tower crane. The panorama-visible and controllable intelligent monitoring and protecting integrated system is characterized by comprising a data collecting module, a data processing module, a control module and a display module; the data collecting module is connected with a video monitoring system on a construction site; the data processing module is connected with the data collecting module; the control module is connected with the data processing module; and the display module is connected with the control module and the data collecting module. Current practical work parameters and rated work capability parameters of the tower crane are displayed in real time through graph numerical values and sounds, and the panorama visible function, the controllable function and the rollover and collision preventing function are integrated.

The invention discloses a PLC frequency-converting speed-governing control system for eliminating tower-type crane load, based on an E1 time-delayed filter, which is developed by the following steps:establishing an inertia pole coordinate system, a non-inertia cartesian coordinate system and a non-inertia sphere coordinate system; establishing a nonlinear dynamics model and a linear dynamics model of a tower-type crane. The control system comprises an operation console, a controller, a PLC, a frequency-converting set, a hoisting mechanism motor, a brake, a hoisting mechanism, an amplitude varied mechanism motor, an amplitude varied mechanism, a swing mechanism motor and a swing mechanism. The controller consists of a load swing frequency and damping ratio calculation unit, a system parameter calculation unit and a time-delayed filter calculation unit. The invention provides the PLC frequency-converting speed-governing control system based on the dynamic property and the time-delayed filter principle of the tower-type crane, which has simple structure, low cost, convenient operation and effective elimination of load swing.

The invention discloses a tower crane intelligent control system and a tower crane. The tower crane intelligent control system comprises an off-crane remote controller, an on-crane remote controller and an electric controller, wherein the off-crane remote controller is arranged off the tower crane, is communicated with the on-crane remote controller and sends a control command to the on-crane remote controller; the on-crane remote controller is arranged on the tower crane, receives the control command and sends the control command to the electric controller; and the electric controller is arranged on the tower crane, receives the control command and controls the movement execution mechanism of the tower crane according to the control command. So the tower crane intelligent control system has the advantages of comprehensive operation functions, avoiding of visual blind areas, flexible position, and realization of selecting a relative ideal position to operate according to the situation on the ground.

The invention relates to a safety technology for remotely monitoring a tower crane, in particular to a system for monitoring the safety of a tower crane. In the system, the output ends of an inclination angle sensor, an angle sensor, a height sensor, an amplitude sensor, a wind speed sensor and a weight sensor are electrically connected with the input end of a signal conditioning module respectively; the output end of the signal conditioning module is electrically connected with the input end of a micro processor; a storage module, a key input module, a voice alarm module and a control output module are electrically connected with the micro processor module; the micro processor module is further electrically connected with an RS232 module; and a global positioning system (GPS) module, a liquid crystal display, a general packet radio service (GPRS) module and a ZIGBEE module are electrically connected with the RS232 module respectively. In order to guarantee the signal processing instantaneity, the micro processor module adopts two micro processors for coordination and distribution of responsibilities; and the two micro processors exchange data with each other by using a system management bus (SMBus), so the high-instantaneity and all-round monitoring of the safety of the tower crane during running can be realized, and safety accidents can be avoided.

The invention provides a hook motion control mechanism for a tower crane. The tower crane comprises a boom, a hook suspended on the boom and used for hosting a heavy object, a slewing mechanism, a hoisting mechanism and an amplitude changing mechanism, wherein the slewing mechanism, the hoisting mechanism and the amplitude changing mechanism are respectively used for driving the boom to rotate, drive the hook to lift and drive the hook to change the amplitude; the hook motion control mechanism comprises an information acquisition device, a processor and a controller, wherein the information acquisition device is used for acquiring the motion state information of the hook of the tower crane in real time when an information acquisition instruction of an operator is received; the processor is used for generating a preset motion locus of the hook according to the motion state information; and the controller is used for controlling the hook to move along the preset motion locus when a starting instruction of the operator is received. Through the system, the control accuracy of the hook can be effectively improved, the operating efficiency is improved, and the labor intensity of the operator is reduced.

The invention discloses a self-jacking construction platform integrating a vertical transportation equipment and a mold base, which comprises a steel platform, construction equipment connected to the steel platform and a supporting jacking system used for connecting the steel platform to the top of a core tube of a high rise building in construction in a supporting way, wherein a spatial steel truss platform is adopted as the steel platform; the construction equipment comprises a hanging rack and a template which are arranged on the spatial steel truss platform, a tower crane, a concrete spreader, a resting place, a simple processing field, a monitoring and overhauling system, and a construction elevator, wherein the tower crane, the concrete spreader, the resting place, the simple processing field and the monitoring and overhauling system are erected on the top of the spatial steel truss platform; and the construction elevator is connected between the spatial steel truss platform and the core tube. The supporting jacking system comprises a supporting stand column, a supporting frame and a hydraulic jacking mechanism. The self-jacking construction platform is arranged flexibly, and the steel platform is supported by the supporting jacking system, therefore, heavy equipments such as the tower crane, the concrete spreader and the like can be directly arranged on the steel platform and rise synchronously with the steel platform so that the time and cost consumed by respective jacking of various large-scale construction equipments are saved, and the construction efficiency is greatly improved.

The multifunctional safety control system for tower crane possesses integrated several functions and is used for effective monitoring on tower crane for safe running. It consists of control circuit and system software. The control circuit consists of microprocessor module, sensor and signal processing module, relay module, keyboard and LCD module, and communication module. All the modules are installed inside one box, the sensor is connected through cable to the box, and the software has the embedded operation system muCOS-II as platform and multiple decomposed tasks for the whole system control.

The invention provides a movable-arm tower crane which comprises a backward-inclination prevention device, wherein the backward-inclination prevention device comprises a backward-inclination oil cylinder, a travel switch, a limiting detection piece and a hydraulic system; the backward-inclination oil cylinder comprises a rodless cavity; a spring is arranged in the rodless cavity; the travel switch is arranged on the cylinder body of the backward-inclination oil cylinder; the limiting detection piece is arranged on the piston rod of the backward-inclination oil cylinder; when the piston rod moves toward the rodless cavity, and reaches a preset position, the limiting detection piece triggers the travel switch; the hydraulic system comprises an oil tank, an oil drainage pipeline communicatedwith the rodless cavity and the oil tank, a logic cartridge valve which is arranged in parallel to the oil drainage pipeline, and is used for quickly draining oil, an overflow valve for draining the oil under preset pressure, and an electromagnetic valve electrically connected with the travel switch; and the electromagnetic valve is used for controlling the logic cartridge valve to change from anopening state to a closing state when the travel switch is triggered. According to the movable-arm tower crane, due to the backward-inclination prevention device, rigid impact between two members, namely a crane jib and an A-shaped frame, is reduced remarkably; the members are uniformly stressed; and the whole safety is improved.

The invention relates to a steel truss hoisting construction method, in particular to a multilayer steel truss fragmented reverse hoisting construction method in an arc-shaped frame. The multilayer steel truss fragmented reverse hoisting construction method comprises the steps of firstly performing modeling and checking calculation to all of hoisting conditions, utilizing brackets at two ends and a portal frame in the middle as lifting points of an arc-shaped main truss, hoisting the arc-shaped main truss by combining a hydraulic synchronous hoisting technology, connecting sub trusses above two roof trusses and steel beams to form a trapezoid fragmented truss, utilizing the temporality-fixed main truss hoisted in position and the hydraulic synchronous hoisting technology to install roof layer fragmented trusses, dismounting the lifting point of the portal frame of the arc-shaped main truss after the arc-shaped main truss is stabilized, sequentially and inversely lifting multilayer fragmented sub trusses to a bottom layer downward, and then utilizing the main truss, the sub trusses, a truck-mounted crane, a tower crane and leading chains to install other members and finish hoisting of a multilayer steel structure of the arc-shaped frame. The multilayer steel truss fragmented reverse hoisting construction method in the arc-shaped frame has the advantages of achieving hoisting operation in a narrow field or on a building surface, ensuring quality and safety, saving expenses, shortening a construction period and being free of pollution and good in environmental-protection benefit.

The invention provides a clamp for a standard knot of a tower crane and a processing template thereof. The processing template comprises a substrate, wherein a basic hole for the processing of a connecting hole is formed on the substrate; and a first positioning part and a second positioning part are further arranged on the substrate. According to the invention, the requirements on positions and dimensions of different models of standard knots and the connecting holes thereof can be met by replacing processing templates with different models, and the clamp and the processing template thereof have the characteristics of simplicity in operation and modularity in operation and further have the advantage of convenience for detection, installation, detachment and maintenance.

The present disclosure concerns a crane, in particular a tower crane, telescopic boom crane, harbour crane and the like, with a load hook that can be raised or lowered via movable crane elements, and moved within a crane working area by operating drive units associated with the crane elements. The crane is provided with a control unit with input means to control the drive units. According to the present disclosure, the crane uses a mobile portable target signal transmitter that can be variably positioned in the crane working area, and positioning means for automatically determining the current position of the target signal transmitter relative to the load hook and / or a crane element, and target control means for automatically controlling the drive units in response to a signal from the positioning means, such that the load hook is automatically moved to the mobile target signal transmitter.

The invention provides an air building machine, and is suitable for high-rise and ultra high-rise residential buildings. The air building machine comprises a body space lifting platform, an outer wall decoration lifting platform, a tower crane and a control device, wherein the body space lifting platform is provided with a body mold, a concrete conveying device, a concrete distributor and a spraying device. When the building is performed, a concrete reinforcement net is arranged firstly, then, the body space lifting platform is descended to splice the body mold with the concrete reinforcement net, and the concrete conveying device conveys concrete to the body mold; after the concrete is condensed to a wall 24 hours later, the body space lifting platform is ascended to release the body mold from the wall; then, the spraying device is controlled to spray the wall, precast slabs and the concrete are arranged on the top surface of the wall, and the top surface of the wall is sprayed to finish the building of one floor; and by repeating the above steps, the building of the high-rise and ultra high-rise residential buildings can be finished. The air building machine has the advantages of simplicity, convenience, whole-course automatic control and material saving.

The invention discloses a hydraulic climbing system for a wall-attached support frame. The system comprises a support upright post, a support frame device and a hydraulic jacking device, wherein the support frame device is detachably connected with a bracket which is fixed on a core barrel concrete wall and at least comprises an upper support frame device and a lower support frame device; both the upper support frame device and the lower support frame device are provided with upright post supporting devices and upright post clamping devices; climbing step blocks are vertically distributed at intervals on a column of the support upright post; and the support upright post is supported on the upright post supporting device through the climbing step blocks and is connected with the upper support frame device and the lower support frame device through the upright post clamping devices in a clamping way. In the system, an overall elevating template system, a construction steel platform system, a tower crane support system and the like are automatically elevated entirely along with the height increase of a building main body. The system has high safety, short climbing time and high construction efficiency, and can be used repeatedly in different projects.

The invention discloses a tower crane video monitoring system with automatic tracking and zooming functions, and the invention also discloses a tower crane video monitoring method with automatic tracking and zooming functions. The method comprises the following implementing steps of taking a marker on a crane hook as a tracking target image, and detecting the area and the center of mass of an object at real time by the image processing technology to realize the automatic zooming and tracking, image sequence acquisition, target characteristic extraction, target characteristic match and target search location; and aiming at swaying in the running process of the tower crane, combining a color histogram with form features, and then improving the present mean shift tracking algorithm which is based on the distribution of a target color histogram according to the real operating condition of the tower crane, thereby realizing the target tracking under the environment of the tower crane. The invention has automatic camera zooming and tracking functions so that a tower crane operator can watch the lifted objects and the circumferential situation thereof clearly in a control room at real time .

The invention belongs to the technical field of building hoisting, and discloses an intelligent assembled building hoisting method based on robot machine vision. A camera is utilized for replacing human eyes to analyze a complex scheme and obtain the optimal scheme, the prefabricated part hoisting path can be better planned, the assembled building hoisting efficiency and accuracy are greatly improved, and assembled building hoisting intelligence is achieved. The character of high precision of the three-dimensional laser scanning technology is utilized for obtaining the three-dimension accuratesize of a prefabricated component, a construction site and a construction tower crane, and high precision of construction is guaranteed. Finally, an operator of the construction tower crane conductsoperation through the obtained tower crane parameters, a field monitoring device can be utilized for visually judging whether the hoisting path requirement is met or not, and the defect that a personis needed for commanding in a traditional hoisting method and the defect that repeated hoisting is conducted for installing precision adjustment are overcome. By means of the intelligent assembled building hoisting method based on robot machine vision, the hoisting accuracy can be improved, the hoisting efficiency is improved, the construction time is shortened, and the labor force is relieved.

The invention relates to a suspended-rising support system of a tower crane, belonging to the field of building machinery. The suspended-rising support system comprises three sets of support structures which have same structure and are arranged up and down. When the suspended-rising support system works, the adjacent two sets of support structures support a tower body; each support structure comprises a support frame, a main girder, two symmetrical inclined struts as well as a first strut, a second strut, a third strut and a fourth strut, wherein the two symmetrical inclined struts are arranged at the lower part of the main girder and support the main girder; the first strut, the second strut, the third strut and the fourth strut support the main girder in the horizontal direction; the main girder, the two inclined struts and one ends of the four horizontal struts are respectively connected with the wall body; the upper part of the main girder is connected with the support frame; an expression of a pivot position of the main girder and the inclined struts is as follow: c(f-c)=a(f-a)+2a(f-c), wherein a is a distance from the action point of the frame at the outer side of a pivot O to the pivot O, c is the midline length of the frame along the main frame direction, and f is the calculation length of the main girder. The suspended-rising support system disclosed by the invention reduces the rigidity of the cantilever end, improves the action force of two main branches of the tower body near one side of a building to the main girder, enables the gravity of the tower body acted to the main girder to move inwards and reduces the horizontal load of the support structures to the building.

The invention provides a power transmission line monitoring and early warning system. The power transmission line monitoring and early warning system comprises a field monitoring device and a surveillance server arranged in a power transmission line monitoring field, wherein the field monitoring device obtains video surveillance data in the monitoring field and transmits the video surveillance data to the surveillance server, and the surveillance server receives the video surveillance data. A target object which intrudes into the monitoring field is judged according to the video surveillance data. The target object is conducted with motion tracking, so that motion tracking data is obtained. According to the motion tracking data, the operation action and the motion trail of the target object are judged. According to the operation action, the motion trail and the position of a power transmission line in the monitoring field, early warning is conducted. According to the power transmission line monitoring and early warning system, a power transmission line cable is monitored in real time; action detection, tracking, recognition, behavioral model understanding and the like to large machinery moving objects such as a tower crane, an excavator and a bulldozer can be achieved; and decision making and the early warning are conducted. The problem of a 'passive monitoring' current situation of a traditional scheme is solved.

The invention relates to a non-contact vibration detecting method of a tower crane structure and belongs to the technical field of detecting. The method is non-contact measurement. A multipoint and on-line test can be achieved by arranging a plurality of cameras without arranging a sensor on a detected object. The non-contact vibration detecting method of the tower crane structure has no load effect and is easy to implement. Image information is directly digitalized to form a full-automation and full-digitalization vibration measurement disposing and recording system. Amount of information is larger than that of a traditional method. Regions of interest (ROI)technology is used in the method to reduce an image tracking area and calculated amount. Speeded-up robust features (SURF) method is used to accelerate extraction rate of feature points. The PauTa criterion is used to reject'outlier' and improve accuracy of the SURF method. Reliability of a crane safety monitoring system in prior art is improved.

The invention discloses a tower crane hoisting and speed control system which comprises a PLC (Programmable Logic Controller); the PLC is respectively connected with an operation handle, a frequency converter and a hoisting sensor simultaneously; the frequency converter is connected with a motor and a speed measurement encoder to form a closed loop; the motor is connected with a winding drum through a reduction gearbox; and the hoisting sensor is used for detecting the hoisting weight through detecting the tensile force of a steel rope. The invention also discloses a tower crane hoisting and speed regulation control method; the PLC is adopted for controlling the speed regulation of the frequency converter to realize the gear separation and stepless speed regulation combination; during the working process, the PLC obtains a handle signal and a hoisting signal in real time and also obtains the current of the motor through a 485 bus; and a hoisting speed control mode is determined according to the state of the system. The device and the method have the beneficial effects that the practical running speed of the tower crane is regulated under the maximum speed limit of all gears, the unpredictability of a driver for speed is avoided, the PLC is adopted for realizing the closed-loop control of the current, and the speed stability is ensured.

The invention relates to a safety monitoring system, in particular to a tower crane safety monitoring system capable of carrying out remote parameter diagnosis. The tower crane safety monitoring system capable of carrying out remote parameter diagnosis comprises a control mainboard, a sensor, wireless modules, a remote monitoring platform, a displayer, a tower crane electric cabinet and a wireless hand set, wherein the wireless modules comprise a short-distance wireless module and a remote wireless module. The tower crane safety monitoring system capable of carrying out remote parameter diagnosis has the advantages that due to the fact that the wireless hand set is designed, debugging and maintenance of the tower crane safety monitoring system are convenient, the frequency of aloft working of workers is reduced, and safety of the workers is protected; the remote monitoring platform can carry out analysis on reported false alarms and missed alarms, and can timely send alarm information to related personnel through a short message platform; the control mainboard can detect abnormal signals of the sensor, and can timely discover a fault of the sensor; the remote monitoring platform can carry out diagnosis to judge whether parameters of the control mainboard are falsified, and can effectively prevent man-made amplification of an alarm threshold value.

The invention discloses a tower crane, and an anti-collision system, an anti-collision method and an anti-collision device of the tower crane. The anti-collision system of the tower crane comprises an acquisition device, a monitoring device and an alarm device, wherein the acquisition device is used for acquiring the hoisting amplitude, the real-time hoisting height, the rotation angle of a cargo boom and the position information of the tower crane as well as the three-dimensional coordinate information of a barrier; the monitoring device is connected with the acquisition device by signals, and is used for generating an alarm control signal when interference danger is confirmed to happen between the barrier and the cargo boom based on the set space rectangular coordinate system according to the dimension parameters of metal parts of the tower crane and the information acquired by the acquisition device, and / or is used for controlling the tower crane to stop working; the alarm device is connected with the monitoring device by signals, and is used for receiving the alarm control signal generated by the monitoring device and alarming according to the received alarm control signal.

The invention discloses a BIM-based jacking formwork comprehensive design and application method. The method comprises the following steps of: firstly, designing a jacking formwork system according to a building structure drawing, and establishing a jacking formwork three-dimensional model based on a standard family library; secondarily, exporting the established three-dimensional model as a specified interface for performing structure checking and adjusting according to a result; and thirdly, in a jacking formwork system use process, respectively performing automatic formwork matching design and optimization, design and simulation of a whole process of mounting and dismounting of a jacking formwork and a tower crane, three-dimensional design and operation and maintenance of a lighting system of the jacking formwork system, comprehensive inspection of safety protection, integration of oil and electric circuit pipelines of the system, and anti-collision design of the tower crane and a climbing plan of the jacking formwork system. Through adoption of the BIM-based jacking formwork comprehensive design method provided by the invention, all designs of the jacking formwork system can be more visualized and precise, and the problems in a jacking formwork design process can be found from the visual level and the design can be adjusted in time, so that the work efficiency is improved, and unnecessary loss is reduced.

The invention relates to a method for reinforcing a soft soil foundation by using cement-soil mixing piles. The method comprises the steps of 1) arranging pile positions on the soft soil foundation; 2) lifting a mixing machine to one pile position on the soft soil foundation by using a tower crane; 3) starting up the mixing machine, wherein a mixing head cuts soil while rotating and then sinks to design depth; 4) preparing cement grout; 5) lifting the mixing head, spraying the grout and performing mixing to enable the cement grout to be fully mixed with the soil till the mixing head is lifted up to the ground; 6) repeating the step 3 to the step 5, wherein each pile requires for re-mixing and re-spraying; 7) filling clean water into an aggregate bin, starting up a grout pump to clean residual grout in all pipelines and cleaning the mixing head; and 8) moving the mixing machine to the next pile position and repeating the step 2 to the step 7 to carry out the construction of the next pile. Compared with the prior art, the method for reinforcing the soft soil foundation by using the cement-soil mixing piles has the advantages that the water-cement ratio is proper, the goal of uniform mixing is easy to realize, the pile forming quality is high, the strength is high, the construction is convenient to carry out, the construction cost is low and the economic benefits are remarkable.

The invention discloses construction equipment for constructional engineering. The construction equipment comprises a tower crane, a control system, a material filling system, a material guiding tube and a 3D (three dimensional) printing head. The control system is used for establishing a model, setting 3D printing precisions according to engineering construction requirements, cutting the established model in layers by the aid of 3D model establishing software and controlling the position of the 3D printing head via the tower crane according to model information in each layer. The material filling system stores construction materials according to model information of each layer and is communicated with the 3D printing head via the material guiding tube. The invention further discloses a construction method for the constructional engineering. By the aid of the construction equipment and the construction method for the constructional engineering, only technicians need to manage equipment operation, prepare materials and manage a construction site, manual construction work of most of workers on the construction site is saved, engineering construction cost is saved, and construction techniques including informatization, automation and visualization of engineering construction are improved.

The invention relates to an assembling type telescopic early-warning discharging platform and an assembling construction method thereof. The platform comprises a fixing part, a telescopic part, a transmission mechanism and an early-warning system, wherein the inner side of the fixing part is anchored to a structural floor slab, and the outer side of the fixing part is movably connected with the telescopic part through the transmission mechanism. The fixing part and the telescopic part are two intelligent wholes, are of a drawer type design, can stretch out and shrink in by virtue of rolling wheels and the transmission mechanism, so as to regulate the stretch-out length of the discharging platform; the discharging platform can easily shrink in or stretch out by virtue of the transmission mechanism, so that the stretch-out length of the discharging platform can be flexibly regulated, and the problem that a tower crane is difficult to operate when site operation conditions are limited, particularly a cornice is formed in an upper part structure is solved; the fixing part and the telescopic part are respectively of an assembling design, and components are connected through bolts, so that the platform is convenient to detach and transport; and by arranging the early-warning system, the tensile force on a steel wire rope is monitored in real time by virtue of a tension sensor, and sound-light alarm is given when the load exceeds a design limiting value, so that the accident is prevented.

The invention relates to a real-time measuring method and a real-time measuring device for the lateral perpendicularity of a tower crane steel structure by a tilt angle sensor, in particular to a method and a method for realizing the measurement of the lateral perpendicularity of a tower body through measuring the component of the top end of the tower body on the side of the tower body. The measurement, display, alarm and recording functions are achieved through the real-time measuring device. The measuring method and the measuring device have the advantages that the lateral perpendicularity of the tower crane steel structure is accurately measured in a real-time manner by a signal acquisition technique, a signal processing technique, an electronic circuit technique and the like, the phenomenon of inaccurate measurement of the lateral perpendicularity of the tower crane steel structure can be reduced, the phenomenon of too high lateral perpendicularity of the tower crane steel structure is prevented, and the accident rate is reduced. The device is convenient to use, is not influenced by the environment, and has a good popularization and application value.

The invention discloses a building construction tower crane and a fixed-point hoisting and lofting auxiliary system thereof. The building construction tower crane comprises a cross arm, a lifting rope and a lifting hook and is matched with the fixed-point hoisting and lofting auxiliary system. The fixed-point hoisting and lofting auxiliary system comprises a base station, a monitoring device and a client terminal. The building construction tower crane is characterized by further comprising a moving station and a speedometer, wherein the moving station is mounted on the cross arm and right above the lifting hook; the speedometer is used for detecting the mileage of the lifting rope; and the moving station receives a satellite difference correction signal from a base station, acquires position information of the moving station and sends the position information to the monitoring device, the speedometer acquires the mileage of the lifting rope, and the monitoring device determines the position of the lifting hook according to the mileage of the lifting rope and the position information of the moving station. According to the technical scheme of the invention, process links in a manual attendance method can be reduced, and the intuition, convenience, accuracy and efficiency of the hoisting operation can be improved.

The invention discloses tower crane rotation control equipment, a system and a method and a tower crane. The tower crane comprises a hanger, an arm rest, a rotation device, a motor and a frequency converter, wherein the frequency converter is used for driving the motor, the motor is used for driving the rotation device, and the rotation device is used for driving the arm rest; and the hanger is flexibly connected with the arm rest. The equipment comprises a receiving device and a control device, wherein the receiving device is used for receiving the actual angular speed or accelerated speed of the hanger; and the control device is used for obtaining the angular speed or accelerated speed of the arm rest, determining the rotation speed and the real-time angular displacement of the hanger according to the actual angular speed or accelerated speed of the hanger, determining the rotation speed and the real-time angular displacement of the arm rest according to the angular speed or accelerated speed of the arm rest, causing the rotation speed and the real-time angular displacement of the hanger to be respectively compared with the rotation speed and the real-time angular displacement of the arm rest, and controlling the frequency of the frequency converter according to compared results. By using the control equipment, the real-time following control of the arm rest speed to the hanger speed can be realized, so that the anti-sway effect is achieved.

The invention discloses a self-climbing tower crane, which comprises a tower body (1), a hoisting arm (2) and a climbing mechanism, wherein the climbing mechanism comprises a main stressed supporting steel beam (4) and a steel structure climbing attached frame (5); the steel structure climbing attached frame (5) is fixedly connected on the main stressed supporting steel beam (4) and is provided with a jacking cylinder (8) and a supporting steel beam (9); and a tower body supporting tread (10) is arranged on a tower body (1), and the bottom of the tower body (1) is provided with a climbing base section (11). The self-climbing tower crane can climb upward along a constructed structure by using the constructed building structure as a support, meet the requirements of superhigh-rise and out-of-code tall buildings on vertical transportation at the whole construction height, contribute to construction efficiency, construction period reduction, steel conservation and energy conservation and create obvious economic and social benefits.

The invention discloses a remote monitoring system for video supervision tower cranes based on 4G wireless communication, which is composed of a monitoring platform, monitoring terminals and a site monitoring platform, wherein the monitoring platform is connected with multiple far-end monitoring terminals through a wide area network; the monitoring platform is composed of a communication server, a database server, a web page server and a gateway; each monitoring terminal is composed of an operation monitor, a distance measuring sensor unit, a weight sensor unit, an amplitude sensor unit, a height sensor unit, a wind speed sensor unit, a rotary sensor unit, a standby power supply unit, a multifunctional man-machine interaction plate mangle and a video acquisition unit; the site monitoring platform is composed of a server, a 4G communication module, a data display unit, a video display unit and a short-range microwave signal receiver. According to the invention, the visible remote information management of tower crane terminal monitoring and tower crane state remote monitoring, failure warning, real-time status display, video information broadcasting and supervision is realized.