2024-03-29T09:04:30Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00013146
2023-03-16T04:50:53Z
1221:1223:1224:1297
超音波定在波測定装置
Ultrasonic Standing Wave Detector
安田, 力
An apparatus detecting the ultrasonic standing waves along the thin wire is described. In this apparatus, a barium titanate transducer is coupled to the one end of the wire, and the transducer emitts the longitudinal waves into the wire. Then the waves travel along the wire toward the other end of it and these waves partly reflected according to the conditions of the termination. When the waves have a sinusoidal waveform of certain frequency, they form ultrasonic standing waves along the wire. From the measurements of these standing waves along the wire, we can obtain the following important quantities in transmission characteristics of the wire or of the load impedance. (1) The half wave-length is obtained from the distance between the successive minima in the standing wave pattern. (2) When the diameter of the wire and the density of the wire material is known, the Young's modulus of the materials and the characteristic acoustic impedance of it will readily be calculated. (3) From the standing wave ratio, the reflection coefficient of the load terminating the wire will be calculated. (4) And, at the same time, if the distance from the terminating point to the point where the velocity indicates a minimum amplitude is known, the value of the mechanical impedance of the load will be calculated by the ordinary impedance chart. The principle of these methods, instrumental consideration, and some observed result. are discussed.
Article
信州大学工学部紀要 10: 230-250 (1960)
departmental bulletin paper
信州大学工学部
1960-12-26
application/pdf
信州大学工学部紀要
10
230
250
0037-3818
AN00121228
https://soar-ir.repo.nii.ac.jp/record/13146/files/Engineering10-12.pdf
jpn