7 results about "Impact depth" patented technology

The embodiment of the application discloses a bridge anti-ship collision device impact force-impact depth model construction method, comprising the following steps: determining the total potential energy of the system in the process of the barge impacting the anti-collision device, wherein the total potential energy comprises the plastic strain energy of the outer panel of the anti-collision device, the compression energy consumption of the internal structure of the anti-collision device, the energy absorption of the bow of the barge and the work of the external impact force; each item in the total potential energy is expressed as a function of the impact force and / or the impact depth of the anti-collision device; each function is substituted into the minimum potential energy principle equation satisfied by the total potential energy, and an impact force-impact depth model for representing the relationship between the impact force and the impact depth of the anti-collision device is obtained. The embodiment can establish a clear mechanism model for the dynamic response of the anti-collision device under the ship collision.

The invention discloses an electric hammer high-frequency impact control system and method for a building punching robot, the system comprises a mechanical arm, an impact electric hammer installed on the mechanical arm and an FOC controller, the impact electric hammer comprises a motor and an impact drill bit driven by the motor, the FOC controller controls the magnitude and phase of current in a motor winding, and the impact drill bit is driven by the FOC controller. The FOC controller is used for controlling the rotating speed, the torque and the impact depth of the motor according to the rotating speed, the torque and the impact depth of the motor, then an algorithm model for current, impact frequency and impact depth deviation control is established, and the FOC controller collects the actual current iqact of a rotating shaft of the motor, the actual impact frequency factor of the impact drill bit and the actual load torque TLact of the motor in real time; deviation judgment is carried out every certain time interval, and drilling depth deviation caused by high-frequency impact is reduced. For the depth deviation generated by reciprocating high-frequency impact of the electric hammer, an algorithm for correcting the depth deviation caused by the high-frequency impact is deduced by monitoring the impact frequency and current change characteristics of the electric hammer.

The invention provides a real-time monitoring and processing method and system for impact resistance test data of foam concrete and application, and relates to the technical field of material detection.The method comprises the steps that a high-speed camera collects a process image of a drop hammer impact foam concrete test block in real time, and image data is transmitted to a control end; the control end identifies the position of the drop hammer relative to the leveling rod in each frame of image in the process image, calculates the impact depth of the drop hammer and determines the impact time of the drop hammer; according to the impact depth and the impact time, the impact speed and the impact energy of the drop hammer are calculated; based on the change relation of the impact speed, the impact energy and the impact depth, an impact response curve is generated, and the impact resistance parameters of the foam concrete are output. According to the method, the impact process can be accurately monitored in real time, quantitative and objective impact resistance parameters are output through automatic data processing, and the problem that in the prior art, a method for quantitatively testing the impact resistance of foam concrete is lacked is solved.

The utility model discloses a design construction auxiliary device based on ground disaster control exploration, including the base of shape like a Chinese character'hui 'and the impact hammer that is provided its inner side, the bottom four corners of the base of shape like a Chinese character'hui' are all rotatingly equipped with the universal wheel that has the lock, both sides of the top of impact hammer are fixedly connected with the L-shaped rod. According to the utility model, a series of structures are arranged, so that the impact hammer is conveniently driven to lift to carry out impact detection work on soil, the impact depth change can be directly measured in combination with the impact hammer during detection, and a worker does not need to move away the impact hammer to expose an impact position and independently use a measuring scale or move and adjust the measuring scale to the impact position to carry out measurement; the operation steps are saved, the use convenience is improved, the impact hammer and other structures can be integrally and safely stored, hidden and protected into the storage box after use, supporting is carried out at the bottom to prevent falling-out, the phenomenon that a large number of measurement impact driving structures and other structures protrude and are exposed on the side, and consequently the structures are likely to be accidentally touched and damaged in the moving process is avoided, and the moving safety is improved.

The invention relates to the technical field of pipeline ultrasonic impact treatment processes, in particular to an ultrasonic impact treatment process method for a circumferential weld of a deepwater steel catenary riser. The method comprises the following steps that dirt in a weld toe area is detected, and an ultrasonic impact gun mechanical arm cleaning path is generated; the impact force and frequency of cleaning are adjusted in real time in the cleaning process, the impact depth in the cleaning process is monitored, and impact parameters of cleaning are controlled through a PI D algorithm; after cleaning is completed, appearance quantitative evaluation is conducted on the grooves in the weld toe area; and carrying out groove area size inspection and wall thickness confirmation based on appearance quantitative evaluation. According to the design, according to inspection of the size of the weld toe groove on the surface of the weld joint and confirmation of the wall thickness of the groove, the standard of the ultrasonic impact treatment process of the weld toe area is limited, the defects of undercut, incomplete fusion, microcracks and the like of the weld toe area on the surface of the weld joint can be removed, smooth transition of the weld toe area of the steel catenary riser is improved, and stress concentration is remarkably reduced.

The embodiment of the invention discloses a collision force-collision depth model construction method for a bridge ship collision prevention device, and the method comprises the steps: determining the total potential energy of a system in the process that a barge collides with the collision prevention device, the total potential energy comprises plastic strain energy of an outer panel of the anti-collision device, compression energy consumption of an internal structure of the anti-collision device, barge bow energy absorption and external impact force acting; each item in the total potential energy is expressed as a function about the impact force and / or the impact depth of the anti-collision device; and substituting each function into the minimum potential energy principle equation satisfied by the total potential energy to obtain a collision force-collision depth model for representing the relationship between the impact force and the impact depth of the anti-collision device. According to the embodiment of the invention, a clear mechanism model can be established for the dynamic response of the anti-collision device under ship collision.

The invention relates to a flat plate damage rapid assessment method for an impact scene of a wedge-shaped ship bow with a fillet, and belongs to the technical field of ship collision. According to the method, a flat plate damage calculation model under the collision of the wedge-shaped ship bow with the fillet is established based on reasonable determination conditions, so that collision scene parameters can be defined, the limit deflection, the resistance-collision depth curve and the energy-collision depth curve of a flat plate can be calculated, and the final collision depth and damage conditions are analyzed and determined in combination with energy conversion. Aiming at the problems of long time consumption, high cost and insufficient precision of a traditional method, the evaluation method provided by the invention has the advantages of economy and rapidness, is suitable for engineering evaluation, and aims at a real ship bow form of a wedge-shaped bow with a fillet. The point contact hypothesis in traditional resistance calculation is corrected, theoretical derivation is carried out based on a real line contact mode, and more accurate and powerful technical support is provided for ship design and safety evaluation.