摘要:
A tapping inspection system (1) includes a hand-held hammer (2), a display (4A), a device (6), a position detection unit (4C) and a storage (23). The hammer (2) is for tapping an inspection portion. The display (4A) is configured to display a target position to be tapped with the hammer (2). The target position is superimposed on the inspection portion. The device (6) is for collecting sound generated when the inspection portion is tapped with the hammer (2). The position detection unit (4C) is configured to detect a position in the inspection portion tapped with the hammer (2). The storage (23) is configured to store an inspection record created by relating the sound collected by the device (6) with the position detected by the position detection unit (4C).
摘要:
A method and apparatus for determining the compressive strength of masonry units based on airborne sonic signals generated by stimulating the samples with short duration, mechanical impulses are described. The non-destructive testing apparatus consists of a specimen support unit which mechanically isolates the masonry unit from the environment and from the support, a mechanical stimulator, and an acoustic response detector. The signals recorded are analyzed to extract the pertinent features which are then used to compute the compressive strength of the sample. The pertinent signals are deduced through a calibration of the masonry type being analyzed (material and shape) based on physical analysis of the sample's normal modes of vibration, or through Finite Element Analysis of the vibrations, or through direct empirical calibration. This non-destructive testing method is low-cost, readily implemented and provides a reliable technique for compressive strength estimation.
摘要:
Various embodiments relating to resonance inspections and in-service parts are disclosed. One protocol (150) includes conducting a resonance inspection of an in-service part (152). The frequency response of the in-service part may be compared with a resonance standard (154) for purposes of determining whether or not the in-service part is changing abnormally (156). An in-service part that is identified as changing abnormally may be characterized as being “rejected” (160). An in-service part that is no identified as changing abnormally may be characterized as being “accepted” (158).
摘要:
A probe (1) for transient elastography comprising a probe casing (PC), at least one ultrasound transducer (US) having a symmetry axis (A), at least a vibrator (VIB), said vibrator (VIB) being located inside the probe casing (PC); the probe (1) being characterized in that the vibrator (VIB) is arranged to induce a movement of the probe casing (PC) along a predefined axis, the predefined axis being the symmetry axis (A) of the ultrasound transducer (US) and the ultrasound transducer is bound to the probe casing (PC) with no motion of the ultrasound transducer (US) with respect to the probe casing (PC).
摘要:
[Problem] It is difficult to determine a state of an opening/closing body for opening/closing an opening section of a building. [Solution] A crime prevention device according to an exemplary aspect of the invention an excitation means for applying vibration to an opening/closing body for opening/closing an opening section of a building; a detection means for detecting the vibration of the opening/closing body to which the vibration has been applied by the excitation means; and a determination means for determining the state of the opening/closing body on the basis of the feature of the detected vibration of the opening/closing body.
摘要:
Provided is a member state evaluation method that makes more highly accurate instantaneous understanding of various states of a member to be tested possible without reliance on the shape of the member, the testing environment, or the skill level of the tester. The member state evaluation method is provided with: a state evaluation database construction step for constructing a state evaluation database by determining a plurality of vibration points and measurement points for each analysis model, carrying out vibration at the vibration points, measuring the acoustic signal generated by the vibration at the measurement points, carrying out frequency analysis, and thereby obtaining, as state evaluation data, frequency distribution data acquired for each vibration point and each measurement point that includes the natural frequencies for each of a plurality of modes; an actual measurement state evaluation data acquisition step for acquiring, as actual measurement state evaluation data, frequency distribution data for the member to be tested that includes the natural frequencies of each of the plurality of modes; and a state evaluation step for evaluating the member to be tested by comparing the acquired actual measurement state evaluation data and all the state evaluation data of the state evaluation database.
摘要:
Provided is a bonding state inspection method to accurately determine the quality of the bonding state of plate materials that have been ultrasonically bonded. The bonding state inspection method comprises: a measuring step in which the rate of energy transfer rate to an anvil is measured each time a vibrating horn is pressed against a plurality of superimposed, plate materials on the anvil and the plate materials are ultrasonically bonded; a calculation step in which a variable threshold is calculated using the energy transfer rate measured each time of the ultrasonic bonding; and a determination step in which the quality of the bonding state of the plate materials is determined based on comparison between the magnitude of the energy transfer rate measured in the measuring step and the variable threshold calculated in the calculation step of the previous ultrasonic bonding.