Abstract: An oil control ring comprises: an oil ring having a pair of land parts arranged in a sliding direction and connected to each other by a web part; and a coil expander that biases the oil ring toward the outer circumferential side in the radial direction. The web part of the oil ring is provided with a plurality of window holes. In the axial cross-sectional view of the largest opening portion of the window hole in the axial direction of the oil ring, a width H1 in the sliding direction of the oil ring and a length L1 of a combustion chamber-side non-window hole part, which excludes the window hole, in the outer circumferential surface of the web part, satisfy the condition of 0.15>L1/H1?0.

Abstract: An ultrasonic tester includes an ultrasonic sensor that applies ultrasound to a test object; a casing that holds the ultrasonic sensor immersed in a contact medium that allows the ultrasound to propagate therethrough, the casing including a test object-facing opening Further, there is circuitry configured to, when the test object-facing opening of the casing is passing an opening of the test object in a test direction of the test object, control a moving speed of the casing such that a region of contact between the test object and the contact medium entering the opening of the test object is kept within the opening of the test object.

Abstract: An ultrasonic device includes: a first and second flaw detection head; a moving mechanism that causes the first flaw detection head and the second flaw detection head to perform scanning; a calibration area in which a calibration standard sample is disposed; a flaw detection area in which an inspection object is disposed; and a controller that performs a first calibration process or a second calibration process, the first calibration process being a process of causing the first flaw detection head to scan the calibration standard sample to perform calibration using the calibration standard sample, the second calibration process being a process of causing the second flaw detection head to scan the calibration standard sample to perform calibration using the calibration standard sample when performing a first flaw detection process of performing ultrasonic flaw detection inspection of the inspection object by the first flaw detection head.

Abstract: An ultrasonic flaw detector includes: a flaw detection head including a probe that transmits an ultrasonic wave to an inspection object formed by a composite member and receives the ultrasonic wave that has reflected on the inspection object; a moving mechanism, which causes the flaw detection head to perform scanning; and a support mechanism disposed such that the support mechanism comes into contact with a lower surface of the inspection object, the support mechanism supporting the inspection object. The support mechanism is configured to come into contact with the inspection object over a predetermined area such that a waveform of the ultrasonic wave that has reflected on a position where the support mechanism is in contact with the inspection object and that is received by the probe is within a noise level.

Abstract: An ultrasonic device includes: a first and second flaw detection head; a moving mechanism that causes the first flaw detection head and the second flaw detection head to perform scanning; a calibration area in which a calibration standard sample is disposed; a flaw detection area in which an inspection object is disposed; and a controller that performs a first calibration process or a second calibration process, the first calibration process being a process of causing the first flaw detection head to scan the calibration standard sample to perform calibration using the calibration standard sample, the second calibration process being a process of causing the second flaw detection head to scan the calibration standard sample to perform calibration using the calibration standard sample when performing a first flaw detection process of performing ultrasonic flaw detection inspection of the inspection object by the first flaw detection head.

Abstract: An ultrasonic flaw detector includes: a flaw detection head including a probe that transmits an ultrasonic wave to an inspection object formed by a composite member and receives the ultrasonic wave that has reflected on the inspection object; a moving mechanism, which causes the flaw detection head to perform scanning; and a support mechanism disposed such that the support mechanism comes into contact with a lower surface of the inspection object, the support mechanism supporting the inspection object. The support mechanism is configured to come into contact with the inspection object over a predetermined area such that a waveform of the ultrasonic wave that has reflected on a position where the support mechanism is in contact with the inspection object and that is received by the probe is within a noise level.

Abstract: A determination assist system including a first image generating section for generating a first planar image based on data of a first test index; a second image generating section for generating a second planar image based on data of a second test index; a differentiation section which differentiates the first planar image and the second planar image to generate a first differential image and a second differential image, respectively; a binarization section which binarizes the first differential image to generate a first binary image including a first region which is not less than a first threshold and a second region which is less than the first threshold, and binarizes the second differential image to generate a second binary image including a third region which is not less than a second threshold and a fourth region which is less than the second threshold; and a determination image generating section.

Abstract: A determination assist system including a first image generating section for generating a first planar image based on data of a first test index; a second image generating section for generating a second planar image based on data of a second test index; a differentiation section which differentiates the first planar image and the second planar image to generate a first differential image and a second differential image, respectively; a binarization section which binarizes the first differential image to generate a first binary image including a first region which is not less than a first threshold and a second region, which is less than the first threshold, and binarizes the second differential image to generate a second binary image including a third region which is not less than a second threshold and a fourth region which is less than the second threshold; and a determination image generating section.

Abstract: A determination assist system including a first image generating section for generating a first planar image based on data of a first test index; a second image generating section for generating a second planar image based on data of a second test index; a differentiation section which differentiates the first planar image and the second planar image to generate a first differential image and a second differential image, respectively; a binarization section which binarizes the first differential image to generate a first binary image including a first region which is not less than a first threshold and a second region which is less than the first threshold, and binarizes the second differential image to generate a second binary image including a third region which is not less than a second threshold and a fourth region which is less than the second threshold; and a determination image generating section.

Abstract: A determination assist system including a first image generating section for generating a first planar image based on data of a first test index; a second image generating section for generating a second planar image based on data of a second test index; a differentiation section which differentiates the first planar image and the second planar image to generate a first differential image and a second differential image, respectively; a binarization section which binarizes the first differential image to generate a first binary image including a first region which is not less than a first threshold and a second region which is less than the first threshold, and binarizes the second differential image to generate a second binary image including a third region which is not less than a second threshold and a fourth region which is less than the second threshold; and a determination image generating section.

Abstract: An audio/video processing device includes a signal processing circuit and a video reproduction circuit. The signal processing circuit supplies an audio signal to a hearing aid, and delays a video signal from the audio signal by a delay time of the hearing aid and supplies the delayed video signal to a video reproduction circuit. The hearing aid performs a hearing aid process on the audio signal supplied from the signal processing circuit to reproduce a sound. The video reproduction circuit reproduces an image from the video signal supplied from the signal processing circuit.