The present invention is directed to a system for determining the structural characteristics of a machine tool. The system comprises an excitation device configured to induce a dynamic excitation in a tool of the machine tool, a preloading device configured to generate a static force on the tool, and a sensing device for acquiring a set of data based on which the structural characteristics of the tool can be determined.

A pallet impact station includes a frame, at least one pendulum swing arm rotatably coupled to the frame, a carriage assembly carried by the at least one pendulum swing arm for impacting a pallet, and a latching mechanism extending between the frame and the at least one pendulum swing arm. The latching mechanism disengages the at least one pendulum swing arm at a raised position so that the carriage assembly impacts the pallet. A controller operates the latching mechanism to disengage the at least one pendulum swing arm.

The invention relates to a test pendulum arrangement for carrying out a crash test dummy certifications, having a test probe which is arranged suspended on a cable arrangement, wherein test conditions are standardized and a cable standard length (l.sub.N) is provided, the cable arrangement having a suspension, wherein a first drive for accelerating the test probe and at least a second drive for displacing the suspension are provided. The invention also relates to a method for operating a corresponding test pendulum arrangement.

A pallet impact station includes a frame, at least one pendulum swing arm rotatably coupled to the frame, and a carriage assembly carried by the at least one pendulum swing arm. A latching mechanism extends between the frame and the at least one pendulum swing arm, and engages the at least one pendulum swing arm when the carriage assembly is in a lowered position, raises the carriage assembly to a raised positon, and disengages the at least one pendulum swing arm at the raised positon so that the carriage assembly strikes a pallet. A sensor generates a signal corresponding to how high the carriage assembly is raised. A controller operates the latching mechanism, including disengaging the at least one pendulum swing arm when a height of the carriage assembly corresponds to a desired release height so that a predetermined impact force strikes the pallet.

Provided are a striking device and a natural frequency measuring device capable of simply and accurately measuring a natural frequency of a system including force detector. The striking device includes an arm capable of swinging around a spindle, and a steel ball arranged in an end part of the arm on a side opposite to the spindle. The spindle is supported by a supporting part capable of lifting up and down relative to a post erected on a magnet stand. A supporting part for supporting a supporting plate is arranged at a position in the post and above the supporting part. A permanent magnet is placed above the supporting plate. The steel ball falls down in an arc shape from a standby height position when the permanent magnet is removed.

An impact sensor body for sensing Charpy impact force is disclosed. The sensor body includes a body of material with a plurality of apertures. The apertures are configured within the body of material to form a flexure member orthogonal to a direction of motion to strike an object.

An apparatus and a method for in-situ testing impact strength of a micro-structure are provided. In one embodiment, the apparatus includes: a flexible beam, one end of which being fixed; an impact mass block disposed at the other end of the flexible beam and being for exerting an impact on the micro-structure; and a locking member including a beam arm and a plurality of locking teeth. The beam arm is perpendicular to the flexible beam and one end of the beam arm is fixed, and the plurality of locking teeth are distributed at intervals along the beam arm, such that the other end of the flexible beam is engaged to one of the plurality of locking teeth when the flexible beam is loaded.

A tester for evaluating pullout load capacity and bond quality of anchor bolts embedded in concrete includes a Schmidt hammer for measuring a rebound number and an ultrasonic pulse velocity tester for measuring the transit time of a pulse transmitted through concrete surrounding an anchor bolt. The rebound number and the transit time are combined and matched against a database record which identifies the pullout load capacity and the bond quality. The transit time is matched to thresholds of transit times associated with porosity, internal cracking, air voids, and water pockets located around the embedded anchor bolt. The Schmidt hammer is further modified by the incorporation of a digital level for measuring the vertical and horizontal angles of inclination of the plunger with the concrete surface, a guide tube for supporting the plunger, and by using a convex plunger tip for improved registration with anchor bolt head.

According to the present technology, an impact test in which an impact application member is made to free fall onto a test sample of a plurality of types of rubbers having different physical properties is performed under prescribed test conditions; data for at least one of three items including a loss energy that is absorbed by the test sample when the impact application member collides with the test sample, a thermal energy that is generated at the test sample, and an indentation amount into the test sample by the impact application member is acquired; and an optimal test sample is selected from the respective test samples on a basis of a ranking of the superiority of the respective test samples with respect to the item(s) for which data was acquired.

An impact test method and an impact test device is provided, wherein an impact application member is caused to fall freely onto a test sample placed on a placement platform. When the impact application member collides with the test sample, an impact force applied to the test sample and an indentation amount of the impact application member with respect to the test sample are measured by a load meter and a displacement meter, respectively. Based on the measured impact force and the measured indentation amount, a calculation unit calculates energy loss absorbed by the test sample when the impact application member and the test sample collide with each other.