Improving the reliability of measurement results when studying the reliability of building structures with the ultrasound pulse method under production conditions

Abstract

The extension of service life of operating building constructions requires a study of the current state of materials in their structural elements. The statement of the problem determines that such studies should be carried out using non-destructive methods, among which the ultrasonic pulsed method is one of the most effective ones. Its effectiveness lies in the efficiency of obtaining measurement data and their sufficient accuracy, as well as in comparative complexity of the measurement process. As a rule, the measurement of the required parameters of the ultrasonic signal is carried out in the presence of vibration interference generated by equipment, vehicles. Such obstacles are elastic waves that propagate in the material of the building object under consideration. As a result, vibration interference is imposed on the information ultrasonic signal. This leads to false measurement results, which can cause an error in estimating the current state of physical and mechanical properties of the material under consideration. Ultrasonic measuring instruments produced in Ukraine and abroad do not have protection from such vibration interference. To solve this problem, technical solutions have been recently developed based on the use of reference values of the controlled parameter of the ultrasonic signal; amplification of the information signal directly in the place of its fixation; and on the analysis of an array of information signals with the use of special software products for their statistical processing. However, the use of such technical solutions does not allow solving the problem completely. In order to solve the problem completely, the following solution was developed. The ideology of the measurement process includes the emission of ultrasonic probing signals and the reception of information signals at two fixed frequencies.