6-19

UDC 621.396
DOI: 10.15350/2306-2819.2017.3.6

METHOD OF THE DISTANCE MEASUREMENT IN A HYDROACOUSTIC MEASURING COMPLEX

B. I. Filippov, I. A. Emelianova
Novosibirsk State Technical University,
20, Karl Marx Avenue, Novosibirsk, 630073, Russian Federation
E-mail: filippov-boris@rambler.ru

ABSTRACT

Introduction. It should be noted that far from all the theoretical problems, connected with determining distances to objects in hydroacoustic channels are solved, and in particular, the use of the reference to the unified time scale or the choice of signals in active methods of determining distances.The article focuses on these problems. The purpose of the work is the justification of the active method of measuring distances according to the system «request-response» using impulse signals with two-frequency coverage. The work considers the method of conducting measurements of characteristics of a measuring object (MO), when it moves at a constant speed 3 knots on the test site, equipped by three multifunctional hydroacoustic stations (MHAS). The measurement object together with multifunctional hydroacoustic stations, deployed at the test site, form the operational hydroacoustic measuring complex (OHMC). Measurement methods of the distance D between objects, separated by the aqueous medium, are based on measurements of the time of acoustic signal propagation between them. It is assumed that the device error of the distance measurement mustn’t exceed six meters. Results. It is shown that the use of the active method with the reference to the unified time scale for obtaining suitable operating characteristics requires applying driving generators with the relative frequency instability as the reference generators at MO and MHAS which is not practical for a number of reasons. Taking into consideration equipment (located at MHAS) volume and weight limitations, it is rational to use the active method using the system «request-response» with impulse signals as the basis of the distance measurement in OHMC. The use of impulse signals with two-frequency coverage as distance measurement system (DMS) signals is offered. The method of the distance measurement with the confirmation where the distance measurement is combined with solving the navigation problem of MO routing in the MHAS range is suggested. The signal system, providing MO operation in the network consisting of 12 MHAS is chosen.

KEYWORDS

hydroacoustic channel; measurement object; multifunctional hydroacoustic station; operational hydroacoustic measuring complex; distance measurement techniques; measurement errors; measurement interval; optimal receiver; hydroacoustic antenna; synchronizing signal.

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For citation: Filippov B. I., Emelianova I. A. Method of the Distance Measurement in a Hydroacoustic Measuring Complex. Vestnik of Volga State University of Technology. Ser.: Radio Engineering and Infocommunication Systems. 2017. No 3 (35). Pp. 6-19. DOI: 10.15350/2306-2819.2017.3.6