4643results about "Safety gear" patented technology

A method for setting a safe work area and a rated load in a swing type work machine, as well as a swing type work machine which utilizes the said method, are disclosed. An area where a strength-based safe work area which is established taking the strength of a swing member into account and a stability-based safe work area which is established taking the stability of the work machine into account overlap each other, is set as a safe work area to be used actually. Likewise, out of a strength-based rated load which is set taking the strength of the swing member into consideration and a stability-based rated load which is set taking the stability of the work machine into consideration, the lower one is set as a rated load to be used actually. Using the safe work area and rated load thus obtained, there are made a safety control and an appropriate display. According to this method, in a swing type work machine such as a crane, it is possible to establish a safe work area and a rated load both matching the actual hoisting capacity of the work machine.

The present invention represents a procedure for compensating the heave movement of offshore cranes. The dynamic model of the compensation actuator (hydraulically operated winch) and the load hanging on a rope are derived. Based on this model, a path-tracking control unit is developed. To compensate the movement of the ship/watercraft caused by waves, the heave movement is defined as a time-varying disturbance and is analyzed with respect to uncoupling conditions. With a model expansion, these conditions are satisfied, and an inversion-based uncoupling control law is formulated. To stabilize the system, an observer is used for reconstructing the unknown state by means of a force measurement. Furthermore, the compensation efficiency can be improved by predicting the heave movement. There is proposed a prediction method in which no ship/watercraft models or properties are required. The simulation and measurement results validate the heave compensation method.

A method and apparatus for enhancing the safety in a work zone surrounding operating equipment including identifying workers within said work zone and warning unauthorized workers within said work zone.

The present invention shows a crane control of a crane which includes at least one cable for lifting a load, wherein at least one sensor unit is provided for determining a cable angle relative to the direction of gravitational force. Furthermore, there is shown a crane control for driving the positioners of a crane which includes at least one first and one second strand of cables for lifting the load, with a load oscillation damping for damping spherical pendular oscillations of the load, wherein first and second sensor units are provided, which are associated to the first and second strands of cables, in order to determine the respective cable angles and/or cable angular velocities, and the load oscillation damping includes a control in which the cable angles and/or cable angular velocities determined by the first and second sensor units are considered. Furthermore, a corresponding crane and a method are shown.

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 container crane includes a movable trolley and a load-carrying frame pendantly connected to the trolley and comprised of a spreader and a head block, for transfer of a container from or to a transport vehicle. Plural optical detectors are mounted on the trolley for identifying longitudinal and transversal edges of the head block or spreader and the transport vehicle. Operatively connected to the detectors is a processing device for determining a spatial position of the edges and calculating a position of longitudinal and transversal center lines of the head block or spreader and the transport vehicle and their spatial positions in relation to one another. In this way a possible offset of the center lines of the head block or spreader with regard to those of the transport vehicle in longitudinal and transversal directions as well as a rotation angle of the center lines can be determined, whereby a detected offset or rotation angle is compensated by displacing the spreader relative to the head block.

An improved crane warning system that includes acceleration sensors, motion sensors, hydraulic sensors, remote communications and/or a camera. The crane warning system may include a crane warning device integrated into the device suspended from the crane.

The present invention provides an apparatus and a method for lifting a single joint of pipe. The single joint elevator of the present invention comprises, in one embodiment, a pair of deployable jaws cooperating with a pair of static jaws to secure a pipe within the slot of a generally horseshoe-shaped body. The deployable jaws of the single joint elevator of the present invention may be rotatably deployable or translatably deployable, or both. In one embodiment, each jaw, including the static jaws and the deployable jaws, comprises a pipe slip movably disposed within the jaw to secure a pipe segment within the slot and to self-tighten as the weight of the pipe segment secured within the single joint elevator is transferred to the slips and the jaws.

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.

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.

In a method for monitoring overstress conditions experienced by a crane component, a wireless signal is received. The wireless signal is indicative of an overstress condition experienced by a crane of which the crane component constitutes an assembled portion. In response to receiving the wireless signal, a record of the overstress condition is stored in a storage module mechanically coupled with the crane component. Information from the record is provided via a wireless communication to facilitate monitoring of occurrence of overstress conditions experienced by the crane component.

The invention discloses a detection method and a detection device for the tipping state of a crane. The disclosed detection method includes the following steps: 11) selecting tipping parameters comprising a dip angle of a work plane opposite to the level surface, a rotation angle, a lifting angle of a jib, and the length of the jig; 12) obtaining tipping lifting weight by sampling in a space formed by the tipping parameters; and establishing the function relationship between the tipping parameters and the tipping lifting weight; 13) substituting the current tipping parameters into the function relationship so as to obtain the tipping lifting weight corresponding to the current tipping parameters; and 14) comparing the current actual lifting weight with the tipping lifting weight corresponding to the current tipping parameters, thus determining whether the crane is in the dangerous tipping state. With the detection method, operators can know whether the crane is in the dangerous tipping state and the safety property of the crane is improved; in addition, the dip angle of the work plane opposite to the level surface is introduced as one tipping parameter, so that the influence on the judgment on the tipping when the crane is in a non-horizontal state is avoided and the judgment on the tipping of the crane is more correct and reliable.

A personal electrical injury protection system is provided which can be worn by electricians, construction workers, or other individuals working around or with low-voltage lines (i.e. generally less than about 600 volts). The personal electrical injury protection system has both a proximity warning component which provides a warning of potential electrical hazards upon close approach to the low-voltage power line and an electrical contact protection component which turns off the power upon actual electrical contact with the power line. The present personal electrical protection system relies on a radio frequency transmitter attached to the worker or person to be protected and a radio receiver/controller connected to the power line. The radio frequency transmitter has a low frequency generator which is used for electrical-contact protection and a high frequency generator which is used for proximity warning.

The present invention relates to a device and a method for sensing (detecting) rear and side areas of construction equipment. The present invention comprises: setting a certain distance from the construction machine (or vehicles) as a safe-distance area (work pattern area); patterning fixed objects within the set safe-distance area; sounding an alarm and/or displaying a captured (or detected) image on a display when other objects excluding the fixed objects that are sensed by the construction machine (that is, the fixed objects that are patterned) are sensed.

The invention provides a harbor crane health monitoring and forecasting visualization system including a sensor subsystem, an information collection and transmission subsystem, a central server and a system client; the sensor subsystem is used for acquiring real-time operation parameters of a crane; the information collection and transmission subsystem is used for sending the real-time operation parameters of the crane to the central server through a wireless sending unit; the central server is used for storing and managing the real-time operation parameters of the crane, then performing health diagnosis on the crane to obtain a health condition diagnosis report, also forecasting whether the crane is failed or goes wrong according to the diagnosis result, and evaluating the operation safety of the crane to obtain a safety evaluation report; the system client is used for displaying the real-time operation parameters of the crane, the health condition diagnosis report and the safety evaluation report. The system can comprehensively, efficiently and real-timely monitor the harbor crane health condition, so as to ensure the safety operation of the harbor crane.

Methods and apparatus are disclosed for a crane safety device configured to operate a processor estimating a trajectory for the crane, determining a potentially dangerous event in response to a yard estimate and the trajectory, and sending alert messages in response to the potentially dangerous event. The processor may further generate the yard estimate. The embodiments may include means for implementing these operations, sensors of the yard estimate to generate the yard estimate, computer readable devices and/or a server containing a program system to instruct a computer to at least partly operate the processor and/or an installation package to create the program system.

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.