Abstract: A tensile load is applied to the test body to increase with time, and an AE wave displacement in the test body is detected (step S1). From the detected AE wave, waveform data are generated for each time section (step S2). For each section, from the waveform data, spectrum data are generated (step S3), a peak of an intensity in the spectrum data is specified, a data part in which an intensity is at least a value of a set percentage of the peak in the spectrum data is extracted as processing target data (step S4), and from the processing target data, the most frequent value of frequency gravity centers is specified (step S5). The most frequent value for each section and a tensile load applied to the test body in each section are output as strength evaluation data for evaluating a tensile strength of the test body (step S6).

Abstract: A strength inspection device for evaluating a tensile strength of a test body as a fiber reinforced composite material includes: an AE sensor that detects AE waves generated in the test body by a tensile load in a test period of application of the increasing tensile load to the test body, and generates waveform data of the AE waves; a target wave specifying unit that specifies, as target waves, the AE waves of duration longer than a time threshold, based on the waveform data; an arithmetic unit calculates a frequency center of gravity concerning each target wave; and an evaluation data generation unit generates strength evaluation data of association between the frequency center of gravity concerning each target waves and magnitude of the tensile load applied to the test body at a detection time point of the target wave.

Abstract: A plurality of ultrasonic transducers of the invented probe are separated in a concentric circle pattern, separated in rows that are orthogonal to a reference line L that passes through the center of circles, and positioned line symmetrically with respect to the reference line L. The detection surface of the invented probe has a circular shape having the diameter D, and has a plurality of segments divided into a plurality of arc-shaped portions that are symmetrical with respect to the reference line L. Further a controller which has a plurality of control channels for controlling pairs of the line symmetrical ultrasonic transducers under the same conditions is provided.

Abstract: The present invention is equipped with an AE sensor 12, a load test device 14, a storage device 22, a frequency center of gravity calculation unit 24 and a determination device 26. A loading pattern including, raising, retaining and unloading is repeatedly applied to a test subject 1 by the load test device 14, the maximum load is sequentially increased, and the AE waves 2 detected by the AE sensor 12 are stored with the load by the storage device 22. Next, the frequency center of gravity of the AE waves is obtained from the relationship between the frequency of the AE waves 2 and the intensity thereof by the frequency center of gravity calculation unit 24, and delamination preceding breakage is determined by the determination device 26 when the frequency center of gravity 5 is less than a prescribed first frequency.

Abstract: A tensile load is applied to the test body to increase with time, and an AE wave displacement in the test body is detected (step S1). From the detected AE wave, waveform data are generated for each time section (step S2). For each section, from the waveform data, spectrum data are generated (step S3), a peak of an intensity in the spectrum data is specified, a data part in which an intensity is at least a value of a set percentage of the peak in the spectrum data is extracted as processing target data (step S4), and from the processing target data, the most frequent value of frequency gravity centers is specified (step S5). The most frequent value for each section and a tensile load applied to the test body in each section are output as strength evaluation data for evaluating a tensile strength of the test body (step S6).

Abstract: A plurality of ultrasonic transducers of the invented probe are separated in a concentric circle pattern, separated in rows that are orthogonal to a reference line L that passes through the center of circles, and positioned line symmetrically with respect to the reference line L. The detection surface of the invented probe has a circular shape having the diameter D, and has a plurality of segments divided into a plurality of arc-shaped portions that are symmetrical with respect to the reference line L. Further a controller which has a plurality of control channels for controlling pairs of the line symmetrical ultrasonic transducers under the same conditions is provided.

Abstract: An ultrasonic transmitter 3 attached to an inspecting target object 1, an ultrasonic receiver 5 receiving a reflected wave of the ultrasonic wave that has propagated from the ultrasonic transmitter 3 in the inspecting target object, a data processing device 7 acquiring position specifying data for specifying a position of a defect 1a in the inspecting target object 1 on the basis of received data representing a waveform of the reflected wave received by the ultrasonic receiver 5 are provided. The ultrasonic wave generated by the ultrasonic transmitter 3 has been frequency-modulated, and has a waveform composed of components of respective frequencies that are deviated from a resonance frequency of the ultrasonic transmitter 3 and the ultrasonic receiver 5. The data processing device 7 includes a pulse compressing unit 21 performing pulse compression on the received data, and acquires the position specifying data on the basis of the pulse-compressed received data.

Abstract: An ultrasonic transmitter 3 attached to an inspecting target object 1, an ultrasonic receiver 5 receiving a reflected wave of the ultrasonic wave that has propagated from the ultrasonic transmitter 3 in the inspecting target object, a data processing device 7 acquiring position specifying data for specifying a position of a defect 1a in the inspecting target object 1 on the basis of received data representing a waveform of the reflected wave received by the ultrasonic receiver 5 are provided. The ultrasonic wave generated by the ultrasonic transmitter 3 has been frequency-modulated, and has a waveform composed of components of respective frequencies that are deviated from a resonance frequency of the ultrasonic transmitter 3 and the ultrasonic receiver 5. The data processing device 7 includes a pulse compressing unit 21 performing pulse compression on the received data, and acquires the position specifying data on the basis of the pulse-compressed received data.

Abstract: A plate material includes a substrate and a coating. The substrate is a plate-like member that does not have protrusions and depressions of submicron order oriented in the thickness direction thereof. The coating is formed on the surface of the substrate with a paint-like material having affinity with respect to the substrate.

Abstract: The present invention reduces the expense of treating the surfaces of a plate material. This surface treatment method treats the surfaces of a plate material that is rolled with rolling oil and employed as a cooling fin of a heat exchanger, and includes a preparation step and a coating application step. In the preparation step, the plate material is prepared. In the coating application step, a coating is applied to the surface of the plate material without carrying out a degreasing treatment.

Abstract: The present invention reduces the expense of treating the surfaces of a plate material. This surface treatment method treats the surfaces of a plate material that is rolled with rolling oil and employed as a cooling fin of a heat exchanger, and includes a preparation step and a coating application step. In the preparation step, the plate material is prepared. In the coating application step, a coating is applied to the surface of the plate material without carrying out a degreasing treatment.

Abstract: The present invention reduces the expense of treating the surfaces of a plate material. This surface treatment method treats the surfaces of a plate material that is rolled with rolling oil and employed as a cooling fin of a heat exchanger, and includes a preparation step and a coating application step. In the preparation step, the plate material is prepared. In the coating application step, a coating is applied to the surface of the plate material without carrying out a degreasing treatment.

Abstract: A plate material includes a substrate and a coating. The substrate is a plate-like member that does not have protrusions and depressions of submicron order oriented in the thickness direction thereof. The coating is formed on the surface of the substrate with a paint-like material having affinity with respect to the substrate.

Abstract: The present invention reduces the expense of treating the surfaces of a plate material. This surface treatment method treats the surfaces of a plate material that is rolled with rolling oil and employed as a cooling fin of a heat exchanger, and includes a preparation step and a coating application step. In the preparation step, the plate material is prepared. In the coating application step, a coating is applied to the surface of the plate material without carrying out a degreasing treatment.

Abstract: In injection-molding first and second blade bodies (2, 3), convex parts (23, 32) are formed on the surfaces of the first and second blade bodies (2, 3), respectively. Then, a horn (16) of an ultrasonic welding device is placed at a position of crossing both the convex parts (23, 32) to come into contact with the top surfaces of the convex parts (23, 32) while pressing them at the same time, and in this state, the ultrasonic welding device is operated. Contact surfaces of the first and second blade bodies (2, 3) are welded at their portions corresponding to a pressing direction of the horn (16) and concurrently, both the convex parts (23, 32) are deformed by melting under pressure through the horn (16) to trickle melting resin of both the convex parts (23, 32) into a clearance (10) between the first and second blade bodies (2, 3), so that both the blade bodies (2, 3) are joined to each other.