METHOD AND DEVICE FOR ACOUSTIC MEASURING IN A PIPELINE

The invention relates to a method for acoustic measuring in technical hollow spaces, for example, for measuring reflection points along long pipelines. The method begins with establishing a broadband exciter frequency range. This is followed by establishing interference frequencies which should not be in the exciter signal, and generating a precursor signal over the frequency range with the omission of the interference signals. Then the precursor signal is coupled into the pipeline and a precursor reflection signal reflected out of the pipeline is received. The precursor signal is compared with the precursor reflection signal and damping frequencies are determined at which the precursor signal on the measuring path along the pipeline is damped much more than the average damping of the entire precursor signal. Then an exciter signal is generated over the exciter frequency range with the omission of the interference frequencies and the damping frequencies. This is followed by coupling the exciter signal into the pipeline and receiving a measuring signal reflected out of the pipeline, as well as evaluating the reflected measuring signal using suitable evaluation methods. The invention also relates to a method for generating an exciter signal and a device for carrying out this method.