Evaluation and improvement of calibration procedure for ultrasonic probes based on continuous frequency scanning (time delayed spectrometry)
The primary aim of this project was the improvement of a method suitable for absolute and continuous calibration of ultrasonic hydrophone probes in the frequency range 1 MHz to 10 MHz. In addition, the fundamental limitation of this novel technique (based on the Time Delay Spectrometry (TDS) principle), together with achievable accuracy and reproducibility of the technique, were investigated and assessed. The fundamental principles of TDS are outlined, followed by a description of the measurement technique employed. Results of the measurements assessing the role played by key TDS parameters are presented, as well as results of the calibration of the miniature ultrasonic PVDF polymer probes in the frequency range 1 MHz to 10 MHz. Details are given of the design and construction of a wideband acoustic radiator, specifically built for this project. The modified two transducer reciprocity technique is outlined in the appendix.
Bibliographic Reference: EUR 13299 EN (1991) 39 pp., MF, ECU 4
Record Number: 199110021 / Last updated on: 1994-12-02
Original language: en
Available languages: en