A test method and test device for comprehensive sound wave attenuation coefficient

Abstract

The invention discloses a test method and device of a comprehensive acoustic attenuation coefficient. The test method comprises steps as follows: first of all, a to-be-tested medium is taken, a transmitting transducer and a receiving transducer are selected, and a sweeping frequency range adapted to resonant frequencies of the transmitting transducer and a receiving transducer as well as a first frequency increment step size and a second frequency increment step size is set, and one end of the to-be-tested medium is enabled to be well contacted with the transmitting transducer, and the other end of the to-be-tested medium is enabled to be well contacted with the receiving transducer; then, a continuous sweeping signal is input into the transmitting transducer during each test; an ultrasonic wave is uninterruptedly transmitted by the transmitting transducer and is received by the receiving transducer after passing through the to-be-tested medium; meanwhile, input voltage of the transmitting transducer, output voltage of the receiving transducer and a sweeping frequency during the test are acquired; the comprehensive acoustic attenuation coefficient under the sweeping frequency is obtained. The test method and device have the advantages that frequency characteristic resources of the transducers are fully used, the transducers adopt working manners of uninterrupted transmission and continuous monitoring during the test, and test time is saved.

Description

technical field [0001] The invention relates to a sound wave attenuation coefficient testing technology, in particular to a comprehensive sound wave attenuation coefficient testing method and testing device. Background technique [0002] Piezoelectric ceramic sensors are used as transducers in applications such as ultrasonic flaw detection, distance measurement, speed measurement, and identification. There are two main application methods of transducers: the first type is integrated transceiver, that is, the work of transmitting and receiving is completed by one transducer; the second type is split body, that is, the work of transmitting and receiving is completed by two or more The transducers are completed together. Regardless of the application method, the key is to use the principles of reflection, transmission, and attenuation of sound waves when ultrasonic waves propagate in the medium to achieve different measurement purposes. For example, the invention patent annou...

AI Technical Summary

Problems solved by technology

In the traditional application of ultrasonic measurement of physical quantities such as concentration, content of certain substances, and the presence or absence of impurities, on the one hand, because only a specified resonant frequency of the transducer is usually used to transmit pulses and detect echoes Measure the sound wave attenuation of the measured medium to judge the change of the measured medium, so the frequency characteristic resources of the transducer are wasted; way of working, thus wasting the continuous working time resources of the transducer

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