摘要:
In the ultrasonic inspection method and equipment, a high-resolution and high-S/N-ratio inspection image can be speedily acquired with ease-of-operability. Inspection of the inside of the inspection target is performed by changing incident angle of the ultrasonic wave oscillated from the array-probe ultrasonic sensor. Then, while performing the inspection, the array-probe ultrasonic sensor is sequentially displaced from the position to the position via the position by using the displacement member. This displacement allows acquisition of inspection images on each position basis. Finally, the inspection images thus acquired are visualized as a processed image by adding or averaging the inspection images by shifting the images by displacement quantity of the array-probe ultrasonic sensor.
摘要:
An ultrasonic testing method is provided to measure a thickness of an object in a simple and highly accurate manner when crystal grains that form a metal solidification structure of a directionally-solidified material cast or the like have a statistical variation.An ultrasonic probe 102 causes a longitudinal ultrasonic wave to be incident on a test object 101 in a direction perpendicular to a surface 101A of the test object 101. As a velocity of the longitudinal ultrasonic wave, the average of velocities of longitudinal ultrasonic waves propagating in directions of crystal orientations , , and is used. The thickness of the test object 101 is measured on the basis of the velocity of the ultrasonic wave and a time period for the propagation of the ultrasonic wave.
摘要:
In the ultrasonic inspection method and equipment, a high-resolution and high-S/N-ratio inspection image can be speedily acquired with ease-of-operability. Inspection of the inside of the inspection target is performed by changing incident angle of the ultrasonic wave oscillated from the array-probe ultrasonic sensor. Then, while performing the inspection, the array-probe ultrasonic sensor is sequentially displaced from the position to the position via the position by using the displacement member. This displacement allows acquisition of inspection images on each position basis. Finally, the inspection images thus acquired are visualized as a processed image by adding or averaging the inspection images by shifting the images by displacement quantity of the array-probe ultrasonic sensor.
摘要:
In order to make it possible in ultrasonic flaw detection to generate ultrasonic waves containing a main beam only by use of an array probe and clearly identify a defect in a specimen by use of images, an element pitch P (the distance between centers of adjacent ultrasonic transducer elements in the array probe) is set longer than ¼ of the wavelength of longitudinal waves generated by the ultrasonic transducer elements and shorter than ½ of the wavelength and reception signals up to time corresponding to the sum of wall thickness round-trip propagation time for longitudinal waves and wall thickness round-trip propagation time for shear waves in the specimen are displayed.
摘要:
In order to make it possible in ultrasonic flaw detection to generate ultrasonic waves containing a main beam only by use of an array probe and clearly identify a defect in a specimen by use of images, an element pitch P (the distance between centers of adjacent ultrasonic transducer elements in the array probe) is set longer than ¼ of the wavelength of longitudinal waves generated by the ultrasonic transducer elements and shorter than ½ of the wavelength and reception signals up to time corresponding to the sum of wall thickness round-trip propagation time for longitudinal waves and wall thickness round-trip propagation time for shear waves in the specimen are displayed.
摘要:
A heat-resistant ultrasonic sensor forms a piezo-electric ceramics film with a thickness of 0.5 mm or smaller and a Curie point of 200° C. or higher on a flexible metal plate. A thin metal film that is an electrode is attached to a top surface of the piezo-electric ceramics film and a metal wire mesh covers the thin metal film and is attached to a top surface of the thin metal film. A core of a heat-resistant coaxial cable is connected to the metal wire mesh at a connection point. The heat-resistant coaxial cable is fixed to the thin metal plate with a metal fixing member that is a ground portion. An electric insulating cover is attached to the thin metal plate and covers the piezo-electric ceramics film, the thin metal film, the metal wire mesh, the connection point, the fixing member, and the core of the coaxial cable.
摘要:
A jet pump beam (hereinafter, referred to as a beam) is fitted into a pair of projecting portions installed to a transition piece, and after the beam is arched, a beam bolt engaged with the beam is tightened. An end of the beam bolt comes in contact with a top surface of an insert member fitted into an elbow disposed between the pair of projecting portions. An ultrasonic sensor head is fixed to the beam bolt, and ultrasonic waves are sent to the beam bolt from the ultrasonic sensor in the ultrasonic sensor head. An ultrasonic measuring apparatus obtains echo intensity of each of reflected waves generated at the end of the beam bolt and a bottom surface of the insert member, and based on the echo intensities, an echo intensity ratio R is calculated. The installed state of the beam is checked using the echo intensity ratio R.
摘要:
A heat-resistant ultrasonic sensor forms a piezo-electric ceramics film with a thickness of 0.5 mm or smaller and a Curie point of 200° C. or higher on a flexible metal plate. A thin metal film that is an electrode is attached to a top surface of the piezo-electric ceramics film and a metal wire mesh covers the thin metal film and is attached to a top surface of the thin metal film. A core of a heat-resistant coaxial cable is connected to the metal wire mesh at a connection point. The heat-resistant coaxial cable is fixed to the thin metal plate with a metal fixing member that is a ground portion. An electric insulating cover is attached to the thin metal plate and covers the piezo-electric ceramics film, the thin metal film, the metal wire mesh, the connection point, the fixing member, and the core of the coaxial cable.
摘要:
A map data distribution server that is connected to a network and distributes map data via the network is provided. The map data distribution server holds first map data and second map data that is of a newer version than the first map data and holds a plurality of update data including an instruction to update the first map data for each of partitions of a given size on a map. The map data distribution server decides whether a predetermined condition is fulfilled upon receiving an update request to update the first map data in a first partition out of the partitions to the second map data from a terminal communicating with the map data distribution server via the network, selects one of the plurality of update data relevant to the first partition, based on the result of the decision, and transmits the selected update data to the terminal.
摘要:
A map data distribution server that is connected to a network and distributes map data via the network is provided. The map data distribution server holds first map data and second map data that is of a newer version than the first map data and holds a plurality of update data including an instruction to update the first map data for each of partitions of a given size on a map. The map data distribution server decides whether a predetermined condition is fulfilled upon receiving an update request to update the first map data in a first partition out of the partitions to the second map data from a terminal communicating with the map data distribution server via the network, selects one of the plurality of update data relevant to the first partition, based on the result of the decision, and transmits the selected update data to the terminal.