An impact testing system includes an impact testing device with a head and a handle to which the head is affixed. The impact testing system also includes at least one vibration sensor. A method of using the impact testing device for automatically assessing impacts applied with the impact testing device to an object is also provided.

The present invention relates to the technical field of equipment for impact tests; more specifically, to an instrumented pendulum for Charpy-type impact tests on miniaturized samples. The instrumented pendulum (1) for miniaturized Charpy impact test, according to the present invention, is characterized in that it comprises a main monolithic part, a cleaver (7) housed in an anterior opening of the main monolithic part, and the at least two additional plates (11, 12) removably attached to the respective sides of the main monolithic part of the instrumented pendulum (1). Further, the present invention relates to a Charpy impact machine comprising the instrumented pendulum (1) and an automatic device (6) for releasing the instrumented pendulum (1) at different values of firing angle.

An exemplary method associated with a crash gate configured to guard against motor vehicles crossing in a direction from an attack side to a protected side includes securing a buttress post assembly and a latch post assembly on opposite sides of a roadway, the buttress post assembly having two vertical buttress posts forming a barrier passage, the latch post assembly having two vertical latch posts forming a latch gap, and a vertical pin positioned in the latch gap; and mounting a moveable barrier in the barrier passage, the barrier including a rectangular frame with a horizontal gate beam extending from a buttress end to a latch end, the latch end including a hook open toward the protected side, wherein in a closed position the latch end is located in the latch gap.

A dropping test device includes a base, a lifting assembly formed on the base, a resetting component, and a transmission assembly. A to-be-detected component is formed on the base. The lifting assembly includes at least one cantilever, at least one cam, and a rotating shaft. The cantilever and the cam are fixed on the rotating shaft. The rotating shaft drives the cantilever and the cam rotates. The cantilever lifts one end of the to-be-detected component during rotating. The resetting component abuts on the cam. The cam drives the resetting component towards the to-be-detected component as the cam is rotating. The resetting component drives the to-be-detected component to return to an original position. The transmission assembly is connected to the rotating shaft and drives the rotating shaft to rotate.

An impact test fixture capable of applying preload on a composite laminate, which is composed of a base, a clamping mechanism and a loading mechanism, where the clamping mechanism is positioned on an upper surface of the base and fixedly connected to the base through a bolt, and the loading mechanism is installed at an end of the base. A composite laminate is placed in a rectangular groove of the base. A first wedge block and a second wedge block are positioned in a base sliding groove between a pressing block and a baffle plate, and inclined planes of the two wedge blocks are oppositely installed; the baffle plate is matched with the base through a first fixing bolt and a second fixing bolt, a loading bolt passes through a screw hole at a side end of the base and is matched with the first wedge block.

A method for testing a helmet for effectiveness of user protection includes moving a load along a predetermined path, supporting a target body at an impact location in the predetermined path, the target body including a head model and a helmet disposed on the head model, and impacting the target body with a force generated by the moving of the load. The impacting of the target body entails contacting the target body with an impactor free to move perpendicularly and tangentially relative to a surface of the target body. The supporting of the target body is at least reduced, if not eliminated, before or during the impact of the impactor with the target body at the location. Forces generated are automatically measured or sensed during the impact of the impactor with the target body at the location.

An impact testing machine is configured. The impact testing machine includes: a testing machine body that applies a load having a prescribed speed to a test piece and conducts a test; a controller that controls the testing machine body; a video camera that photographs the test piece; and a pulse generator. The controller includes: a detection signal capturing unit that captures a detection signal of the load in a prescribed measurement sampling period; and a synchronizing signal output unit that outputs a sampling synchronizing signal that is synchronized with the measurement sampling period. The pulse generator includes: a photographing instruction signal generator that generates a photographing instruction signal by multiplying or dividing the sampling synchronizing signal, and outputs the photographing instruction signal to the video camera. The photographing instruction signal issues a photographing instruction to the video camera.

Methods of detecting pipeline weakening are described herein. The methods include creating a pressure wave in a fluid flowing in a pipeline using an input transducer located at a first position along the pipeline; measuring the pressure wave using an output transducer positioned at a second position along the pipeline that is spaced from the first position, and generating an output signal based on the pressure wave; analyzing the output signal to determine a stiffness of a sidewall of the pipeline positioned between the input transducer and output transducer; and determining if the sidewall includes a defect based on the stiffness of the sidewall, including analyzing a frequency response of the output signal to detect the defect.

A mechanical material property test fixture for testing a material, the fixture includes a plurality of beams disposed on one geometrical plane, a plurality of linear bearings, a plurality of hinged linkage bars, and an apparatus that applies force on the plurality of linear bearings such that the material being tested has a uniform force applied on it by the fixture. Each beam has substantially equal angles between adjacent beams, while each linear bearing is disposed on a corresponding beam. The linear bearings are attachable to the material being tested. Each linkage bar communicates with two adjacent linear bearings such that the linear bearings can freely slide along the corresponding beam. The linkage bars are substantially the same length such that a symmetric multi-axial movement in the linear bearings is created, and allows for equal force to be applied to the material.

A test result evaluating method and a material tester are provided. A test result evaluating part includes a representative value calculating part that acquires a representative value of section data corresponding to one period of a natural vibration frequency from data of a time period representing a force applied to a test piece also including a natural vibration and a ratio calculating part that calculates a ratio between the representative value acquired by the representative value calculating part and a value based on an amplitude of the natural vibration. The representative value calculating part and the ratio calculating part are arranged in a test result evaluating part as programs realizing functions by operating an arithmetic operation device.