201 results about "Suspended load" patented technology

A control device and system for controlling a suspended load of a container crane with a trolley, a spreader and load lines arranged in a four point suspension for lifting a load and an optical sensor for sensing a deflection position of an orthogonal axis of a container suspended under the spreader. Two or more actuators are arranged attached to at least one load for moving at least one said suspension point closer to or farther away from an imaginary center line by shortening and / or lengthening the at least one load line.

The invention relates to a retrofit connector for fast attachment to an existing system that supports a suspended load below a ceiling, beam or floor without the need to disassemble or disconnect any components of the system. Advantageously, the connector is easy to install and inexpensive to manufacture. The connector is removably or permanently attachable to a sway brace clamp or attachment to form a pivotable connector-clamp assembly. The assembly is capable of reliably supporting heavy loads against adverse sway and seismic disturbances.

An apparatus, program product, and related methods for gravity stabilizing a suspended load are provided. The apparatus includes an center of gravity stabilized automated adjusting load bar in communication with a mobile cart which allows an operator to enable automated stabilization of a load. The adjusting load bar includes redundant first and second control and drive systems. A third control system can both monitor sensed data and the movement commands of first and second control systems, and can monitor the resulting physical movements. If a movement command and the resulting movement does not match or if there is an out of tolerance mismatch between movement commands of the first and the second control systems, the third control system can automatically detect this condition and shift into an emergency stop condition.

A suspended-load backpack designed to permit the load to move relative to the backpack frame during walking and running so that the large movements between the load and the frame of the backpack reduce the fluctuations of absolute vertical motion of the load. Because the hip (and thus the pack frame) go up a down a good deal during walking, a large relative movement between the frame and the load reduces the absolute excursion of the load. This movement may be, in turn, transferred to a motor through, for example, a rack and pinion gear, to convert the mechanical movement to electrical energy. The movement may also be converted to electrical energy by using an electroactive polymer (EAP) to connect the suspended load to the frame. Such designs allow the load to move in a controlled fashion to prevent the patient from losing his or her balance as the load moves up and down along the backpack frame. Such movement of the suspended-load relative to the frame also reduces the forces on the wearer's shoulders while walking or running, thus reducing the likelihood of orthopedic injury.

The invention discloses a simulating method of numerical values of sediment movement of silty and muddy coast. The simulating method mainly comprises the following steps of: step one. establishing basic equations which comprise a water current continuity equation, a water current movement equation, a suspended load transporting and diffusing equation and a bed surface scouring and silting variation equation; step two. calculating the shearing stress of a bed surface under the combined action of settling velocity of suspended sediment, scouring and silting functions of sediment and wave currents; step three. establishing a sediment mathematical model and solving; step four. verifying the model, including water current verification and sand content verification; and step five. judging a settling velocity field of the suspended sediment according to the sediment mathematical model. According to the simulating method, the sediment mathematical model is established on the basis of considering the characteristics of muddy and silty sediment, and the movement of two different types of sediment can be simulated simultaneously; and more than that, the established sediment mathematical model also can be used for calculating the settling velocity field of the suspended sediment; and accordingly, the characteristics of a region and influence factors are analyzed and researched.

A system and method for using a gantry crane to efficiently and safely transport loads such as containers and ship hatch covers from one location to another along a known path while avoiding collisions between the loads and obstructing objects which may be situated in the known path. A transceiver emitting laser beams may be used to establish both the position of the spreader and its load and the profile of the known path. Continuous comparisons are made by computer between the location of a dynamic digital protective envelope constructed around the crane spreader and its load, if any, and a digital representation of the profile of the known path to be traveled by the spreader and its load, if any. In the event, the comparison indicates intersection of the protective envelope and the path profile, a speed limit is imposed on the motor controlling the movement in the X axis of the trolley or in the Z axis of the spreader, as required to prevent a collision.

A suspended-load backpack designed to permit the load to move relative to the wearer during walking and running so that the large movements between the load and the wearer of the backpack reduce the fluctuations of vertical motion of the load with respect to ground. Because the hip (and thus the pack body) goes up a down a good deal during walking, a large relative movement between the wearer and the load reduces the absolute excursion of the load. This movement may be, in turn, transferred to a motor through, for example, a rack and pinion gear, to convert the mechanical movement to electrical or mechanical energy. Such movement of the suspended-load relative to the wearer also reduces the forces on the wearer's body while walking or running, thus reducing the likelihood of orthopedic injury. The suspended-load backpack includes a suspension system having a first portion connected to shoulder straps directly or through an interface and a second portion connected to the pack body and a compliant mechanism that permits the second portion of the suspension system and the pack body to move up and down relative to the first portion of the suspension system in accordance with a gait of the wearer of the backpack.

It is one advantage of the invention to provide an interlocking swivel connector for attachment to an existing system supporting a suspended load below a ceiling, beam or floor without the need to disassemble or disconnect any components of the system. The connector is easy to install and inexpensive to manufacture. The connector is removably or permanently attachable to a sway brace clamp or attachment to form a connector-clamp assembly. The assembly is capable of reliably supporting heavy loads against adverse sway and seismic disturbances. It is another advantage of the invention to provide a sway cable brace clamp or fitting for securely attaching to a bracing cable and for supporting a suspended load below a ceiling, beam or floor. The cable clamp is easy to install and inexpensive to manufacture. The cable clamp is capable of reliably supporting heavy loads against adverse sway and seismic disturbances.

An apparatus, program product, and related methods for gravity stabilizing a suspended load are provided. The apparatus includes an center of gravity stabilized automated adjusting load bar in communication with a mobile cart which allows an operator to enable automated stabilization of a load. The adjusting load bar includes redundant first and second control and drive systems. A third control system can both monitor sensed data and the movement commands of first and second control systems, and can monitor the resulting physical movements. If a movement command and the resulting movement does not match or if there is an out of tolerance mismatch between movement commands of the first and the second control systems, the third control system can automatically detect this condition and shift into an emergency stop condition.

A method of operating a mobile crane with a boom includes the steps of determining maximum permissible loads for a plurality of positions in a predetermined position range of the boom, determining a load limit and / or one or more load ranges based on a suspended load and on the maximum permissible loads for the plurality of positions of the predetermined position range of the boom, and operating the mobile crane dependent upon the load limit and / or the one or more load ranges. The load limit can be a local load limit and the one or more load ranges can be one or more local load ranges.

A performance line display unit includes an imaging device which is attached near a leading end of an extensible boom provided on a rotation platform rotatably placed on a vehicle of a crane, a display configured to display an image imaged by the imaging device, and a performance line arithmetic part configured to obtain a performance line regarding a suspended load maximum performance of a crane, wherein the performance line arithmetic part is configured to overlap the performance line with a position of the image corresponding to the obtained performance line to be displayed on the display.

It is one advantage of the invention to provide an interlocking swivel connector for attachment to an existing system supporting a suspended load below a ceiling, beam or floor without the need to disassemble or disconnect any components of the system. The connector is easy to install and inexpensive to manufacture. The connector is removably or permanently attachable to a sway brace clamp or attachment to form a connector-clamp assembly. The assembly is capable of reliably supporting heavy loads against adverse sway and seismic disturbances. It is another advantage of the invention to provide a sway cable brace clamp or fitting for securely attaching to a bracing cable and for supporting a suspended load below a ceiling, beam or floor. The cable clamp is easy to install and inexpensive to manufacture. The cable clamp is capable of reliably supporting heavy loads against adverse sway and seismic disturbances.

The invention discloses a method and a device for simulating bottom sludge erosion and transmission feature in a rectangular trough. The method comprises the following steps of: applying different constant current scouring forces to the surface of columnar bottom sludge with an un-disturbed structure in the vertical direction, so that the columnar bottom sludge is eroded under the actions of different hydrodynamic forces, and simulation of the bottom sludge erosion under the disturbance of different hydrodynamic force strengths is realized; and respectively capturing a suspended load and a bed load in the eroded bottom sludge at the same time, so that simulation of the transmission feature of the eroded bottom sludge is realized. The device comprises a water inlet tank, the flat elongated trough, a water outlet tank, a water storage tank, a columnar sludge sample pipe, a bed load sand capturing device and a suspended load sand capturing device. According to the method and the device, the problems that the external force condition is uncontrollable and the original structure of the bottom sludge is kept are solved by using a constant acting force produced by a constant water level difference on the surface of the bottom sludge; and the bed load and the suspended load produced after the bottom sludge is suspended are effectively collected by adopting different devices respectively, so that an effect of simulating the bottom sludge erosion is achieved.

The control optimization method for helicopters carrying suspended loads during hover flight utilizes a controller based on time-delayed feedback of the load swing angles. The controller outputs include additional displacements, which are added to the helicopter trajectory in the longitudinal and lateral directions. This simple implementation requires only a small modification to the software of the helicopter position controller. Moreover, the implementation of this controller does not need rates of the swing angles. The parameters of the controllers are optimized using the method of particle swarms by minimizing an index that is a function of the history of the load swing. Simulation results show the effectiveness of the controller in suppressing the swing of the slung load while stabilizing the helicopter.

The invention relates to a suspended load transportation flight control technology for a rotor unmanned aerial vehicle, which well suppresses the swinging of a suspended load in the flight while controlling the position of a four-rotor unmanned aerial vehicle under a condition that partial parameters of the system are unknown. The invention adopts a technical scheme that the control method for a suspension flight system of the four-rotor unmanned aerial vehicle based on an energy method comprises the steps of designing a Lyapunov equation based on an energy function method, and thus designinga controller to realize control for the unmanned aerial vehicle. Specifically, firstly stress analysis is respectively performed on the unmanned aerial vehicle and a suspended object in the suspensionflight process of the four-rotor unmanned aerial vehicle so as to acquire a nonlinear dynamic model of the suspension flight process of the four-rotor unmanned aerial vehicle. The nonlinear control method is mainly applied to suspended load transportation flight control of the rotor unmanned aerial vehicle.

The fuzzy logic-based control method for helicopters carrying suspended loads utilizes a controller based on fuzzy logic membership distributions of sets of load swing angles. The anti-swing controller is fuzzy-based and has controller outputs that include additional displacements added to the helicopter trajectory in the longitudinal and lateral directions. This simple implementation requires only a small modification to the software of the helicopter position controller. The membership functions govern control parameters that are optimized using a particle swarm algorithm. The rules of the anti-swing controller are derived to mimic the performance of a time-delayed feedback controller. A tracking controller stabilizes the helicopter and tracks the trajectory generated by the anti-swing controller.

The invention relates to a device for adding sand to suspended load in a river model test, and belongs to the field of hydraulic tests. The device mainly comprises a sand supply power system, a sand release device, a sand supply pipe and a return pipe, and is characterized by also comprising an integrated automatic control system, wherein the inlet and outlet of the sand supply power system is connected with the sand release device through the sand supply pipe and the return pipe to form a suspended load slurry conveying loop; and the integrated automatic control system is connected with the sand supply power system and the sand release device through a control line to monitor and adjust the suspended load slurry conveying process of the sand supply power system and the sand release device. By the device, the sand supply system is not blocked, backflow of a bypass pipe and the return pipe stirs a slurry tank, and a sand adding hole is not clogged under any experiment conditions; and the device can accurately meter the sand adding flow, and can fully automatically control to add the sand.

A control device and system for controlling a suspended load of a container crane with a trolley, a spreader and load lines arranged in a four point suspension for lifting a load and an optical sensor for sensing a deflection position of an orthogonal axis of a container suspended under the spreader. Two or more actuators are arranged attached to at least one load for moving at least one said suspension point closer to or farther away from an imaginary center line by shortening and / or lengthening the at least one load line.

A radar altimeter for vehicles that operate with a load suspended underneath is described. The radar altimeter includes a transmitter configured to transmit radar signals toward the ground, a receiver configured to receive reflected radar signals from the ground and from the suspended load, and at least one altitude processing channel configured to receive signals from the receiver. The radar altimeter also includes a load profile channel configured to receive signals from the receiver. The load profile channel limits an altitude processing sensitivity of the radar altimeter between the radar altimeter and the suspended load to reduce a likelihood that the radar altimeter will process signals reflected by the suspended load.

A dolly or pallet equipped with an elastically suspended load-bearing surface so as to responsively move downwards as materials are loaded and move upwards as loads are removed thereby reducing variation in the height of the top of the stack. The elastic suspension elements are connected to suspension support structures configured to fold into a compact folded position to facilitate storage and return transport and to unfold into a fully erected position at the time of use.

The invention relates to the technical field of engineering machines, and discloses a system, method and device for detecting the length of released ropes of a winch and a crane. The detection system comprises a tilt angle sensor, a released rope turn number detection device and a control device. The tilt angle sensor is used for detecting the current swing angle of a rope pressing device, and the current swing angle corresponds to the rotating radius of the kth layer of steel wire ropes outside a winch roller. The released rope turn number detection device is used for detecting the number of turns of the released ropes of the kth layer of steel wire ropes. The control device is respectively in signal connection with the tilt angle sensor and the released rope turn number detection device and used for obtaining the released rope length of the kth layer of steel wire ropes according to the current swing angle of the rope pressing device and the number of the turns of the released ropes of the kth layer of steel wire ropes and obtaining the total released rope length of the winch according to the released rope length of the kth layer of steel wire ropes and the number of layers of the released ropes of the winch. According to the technical scheme, the detection precision of the released rope length of the winch can be improved, and then the suspended load accuracy is improved.

A method of swing stopping control of a suspended load of a crane including a hoist and a trolley solves an equation of motion, given as an equation with respect to the deviation angle of a suspended load from the vertical direction when the trolley travels, for the trolley acceleration to thereby obtain the value of the acceleration or deceleration of the trolley, obtains speed patterns corresponding to the values of the acceleration or deceleration, drives the trolley according to the obtained speed patterns, and carries out control so that the deviation angle of the suspended load from the vertical direction becomes zero at the time when the acceleration or deceleration of the trolley is ended. Thus, even if the length of a rope holding the suspended load up is changed, a required speed pattern is produced to permit highly accurate positioning.

The invention discloses a seepage failure testing device and method for a seam pipeline between pipe bags and dam bags, and relates to the field of physical model tests of water conservancy projects. The device adopts the structure that a cantilever is horizontally arranged at the upper part of a support, one end of the cantilever is connected with a water-outlet tank, and the other end of the cantilever is connected with a water-inlet tank; a lower-end hose of the water-outlet tank is connected with a suspended load sand-collecting tank, and a lower-end hose of the water-inlet tank is connected with a sand tank; a water tank is connected between the suspended load sand-collecting tank and the sand tank, a bed load sand-collecting tank is connected to the water tank near one side of the suspended load sand-collecting tank, pipe bag fabric is stuck on the inner wall of the water tank, a plurality of water pressure sensors are arranged in the water tank, and are connected with a data collecting card, and the output end of the data collecting card is connected with a computer; a sand filling chamber, a steady flow chamber and a water inlet chamber are sequentially arranged from one side near the water tank to one side far away from the water tank in the sand tank. The seepage failure testing device and the testing method realize the purposes of simple device, convenience in operation and low processing cost, are economic and applicable, and are suitable for small physical model tests.

The invention provides an automatic monitor for suspended load sediments in river water. The automatic monitor comprises a sample container with a water inlet, an overflow port and a water outlet, a weighing instrument which is electrically connected with a controller, a water pump which is electrically connected with the controller, and the controller, wherein a solenoid valve is arranged on the water outlet; an inlet of the water pump is connected with one end of a water inlet pipe, and the other end of the water inlet pipe stretches into water to be monitored; an outlet of the water pump is communicated with the water inlet of the sample container; the controller is used for transmitting instructions to the water pump, the weighing instrument and the solenoid valve respectively according to preset starting conditions and controlling actions of the water pump, the weighing instrument and the solenoid valve. The water pump is controlled to pump water in a specified volume into the sample container at a specified time point through the controller, the sample container containing water is weighed by the weighing instrument, and finally, the controller can obtain the content of suspended load sediments in water according to weighing data, the volume of pumped water and the specific gravity of the suspended load sediment. Moreover, monitoring conditions are input into the controller in advance, and manual sampling and other processes are not required, so that the monitoring efficiency is improved, and manual labor is reduced.

The embodiment of the invention provides an idling speed adjusting method and system. The idling speed adjusting method and system are applied to a vehicle control system of an autocrane. The method comprises the steps that the value of the altitude where the autocrane is located and the pressure value and the flow value at an oil pump outlet of the autocrane are acquired; engine external characteristic data are corrected according to the value of the altitude, and the load torque need is calculated according to the pressure value and the flow value; the maximum engine torque corresponding to the corrected engine external characteristic data is sought; and the load torque need is compared with the maximum engine torque, and if the maximum engine torque is smaller than the load torque need, an engine is controlled to increase the rotating speed. According to the method, the value of the current altitude and the load torque need are detected to adjust the power takeoff idling speed in real time, the suspended load need of the autocrane is met, and meanwhile the suspended load oil consumption is reduced.