Abstract: A method of impact testing an article of protective equipment includes mounting the article of protective equipment on a deformable member. The method also includes impacting the article of protective equipment with an impact object. Moreover, the method includes detecting an effect of impact on the deformable member due to impacting the article of protective equipment with the impact object.

Abstract: A method and device for testing the quality of a display substrate are provided to detect whether the substrate has been broken. The device comprises an ultrasonic emitter and an ultrasonic receiver, both of which are set on the side opposite to the processing area, and it further comprises an ultrasonic analyzer connected to the ultrasonic receiver. The ultrasonic emitter emits ultrasonic waves for testing to the substrate, the ultrasonic receiver receives the ultrasonic waves reflected from the substrate, and the ultrasonic analyzer connected to the ultrasonic receive analyzes the received ultrasonic waves to determine whether the substrate has been broken. In the present invention, the fragment on anywhere comprising the processing area and the non-processing area of the substrate can be detected, the broken substrate can be picked out overall, and thus preventing the broken substrate from damaging the production line and the products.

Abstract: A non-destructive testing method to evaluate the structural integrity of pre-stressed concrete railroad ties in track to identify deterioration and the eventual loss of bond between the reinforcing wires and the surrounding concrete. The application of an impact echo system to the end of each railroad tie will identify ties that have deteriorated to the extent that structural cracks have formed. The method includes employing a tool having a plurality of transducers and a single impinger to impart sound waves through a top surface of the railroad tie and to receive and evaluate the echoes of the sound waves to determine if the tie is structurally sound or structurally unsound.

Abstract: The present invention is related generally to the field of non-destructive materials testing using ultrasonic devices, more particularly, ultrasonic devices in a phased array and includes a wedge for conducting pitch-catch ultrasonic phase array testing of materials wherein the wedge includes a liquid column and is manufactured with specific angles so as to control the angle at which the ultrasonic waves pass into the wedge and then are refracted when passing from the liquid in the liquid column into the material being analyzed, thus providing a wider range of analysis via sweeping the beams from the wedge than was possible with known wedges.

Abstract: A system and method of performing acoustic thermography in which invalid data is filtered from data used to detect defects on a structure. An ultrasonic sound input signal is provided to a structure to produce a thermal image output. A sensor senses an input energy corresponding to the sound input signal and produces an input energy signal. The input energy signal is transformed to a test spectrum and is compared to a reference spectrum. The comparison of the test spectrum to the reference spectrum is used to determine whether to include the thermal image output in an analysis for detecting defects in the structure.

Abstract: A signal processing utility is disclosed involving time-to-frequency domain transforms for applications including medical diagnostic signal processing. Such transforms can be used to define a continuous spectral density function or other spectral density function including nonzero values at irregularly spaced frequency intervals. The invention thereby enables more accurate representation of certain real spectra and reduced spectral broadening. The utility also accounts for digitization errors associated with analog-to-digital conversion. The invention has particular advantages with respect to medical contexts where the received signal has a changing spectral content as a result of interaction of an interrogating signal with moving physiological material such as blood flowing through an artery.

Abstract: The invention is based on the problem of providing an inspection device and an inspection method, which recognise the defective lenses, which are difficult to detect with conventional optical methods, with a high degree of reliability. According to the invention, the contact lenses are exposed to an ultrasonic field, which leads to destruction of defective lenses, while perfect lenses are as a rule not destroyed. In particular, the method is capable of detecting cracks which are often overlooked by optical methods, since this type of defect reacts especially sensitively to the soundwaves being received.

Abstract: A probe for an egg-testing device includes a probe tube with an annular magnet disposed at a bottom end thereof. In the probe tube, a spherical excitation member is magnetically retained by the annular magnet. The probe is axially movable in a metal tube around which a bobbin is wound. In a rest position, the probe is retained by the magnetic attractive force between the metal tube and the annular magnet. The probe is brought into an operating position by an excitation pulse supplied to the bobbin, which pulse is provided by a control unit, taking into account the diameter of an egg to be tested and the conveying speed of a conveyor.

Abstract: The invention relates to an apparatus for testing eggs by means of mechanical vibrations, comprising: support means for supporting an egg for testing; an exciter for exciting the egg for testing; a transducer for receiving the vibrations generated in the egg by the exciter and for converting the vibrations into electrical signals; and a measuring instrument connected to the transducer for analyzing the electrical signals coming from the transducer, wherein the exciter is adapted to excite the egg for testing with a single blow.

Abstract: Measurement of the acoustical resonances in eggs is shown to provide a rapid, noninvasive technique for establishing the presence of Salmonella bacteria. The technique is also sensitive to yolk puncture, shell cracks, and may be sensitive to other yolk properties and to egg freshness. Remote characterization, potentially useful for characterizing large numbers of eggs, has been demonstrated.

Abstract: A procedure and apparatus is provided for the examination of eggs to determine the presence of cracks or holes in the egg shell through the examination of the resiliency of the shell. This procedure and apparatus are characterized by the subjection of the egg to an examination cycle which consists in exercising intermittent pressure on at least a section of the egg shell by a movably mounted probe to create a series of in principle elastic deformations, where each subsequent deformation in the series is caused by the shell's action on the probe as a reaction to the immediately preceding deformation.

Abstract: System for monitoring containers with ultrasonic seals.According to the invention the seal is duplicated and comprises a transmitting transducer and a receiving transducer. The exciting signal is a voltage step applied to the transmitting transducer and the circuit able to supply said step is directly connected to the transmitting transducer without a connecting cable.Application to the monitoring of containers containing dangerous products, precious materials, documents, etc.

Abstract: This seal is characterized in that the delay line is extended by a frustum-shaped part terminated by a spherical cap, which is able to receive a marking participating in the acoustic identity of the seal. The sealing capsule of the seal is perforated with an opening adapted to the dimensions of the frustum-shaped part of the identity module. The sealing cable is fixed between the module and the sealing capsule.Application to the monitoring of containers containing dangerous or precious products and the like.

Abstract: The containers to be tested are brought into an ultrasonic wave field of which the intensity is assessed so that defective containers are destroyed, while mechanically perfect containers remain unaffected. Since the containers destroyed fall out of their holders, sorting takes place simultaneously.