RU2537749C1 - Hydrophone tract with dismantling-free inspection of its operability - Google Patents

Abstract

FIELD: measurement equipment.

SUBSTANCE: first at the inlet of the inspected hydrophone tract they connect an equivalent with a narrow-band spectrum of one value, and then they connect an electric equivalent with a narrow band spectrum of another value. At the outlet of the inspect tract they take the ratio of received response of supplied test signals. At the equality of this ratio with the ratio of test signals they diagnose good condition of the hydroacoustic tract.

EFFECT: elimination of necessity to perform temperature measurements during practical implementation of the invention.

1 dwg

Description

The invention relates to measuring equipment, metrology and hydroacoustic and can be used for dismantling the operational status of the hydroacoustic tract in natural conditions.

Known hydrophone path (GT) of the same purpose, adopted as a prototype, containing a piezosensitive element, a transducer unit, a processing and registration unit, an electric equivalent of a piezosensitive element in the form of a resistor and a controllable switch made with the possibility of a controlled connection to the input of the transducer block of a piezosensitive element or its electrical equivalent, while the output of the amplifier is connected by a cable to the processing and registration unit [RF Patent No. 2450479, cl. H04R 29/00, H04R 1/44, 2012].

The disadvantage of the prototype is the need for temperature measurements when checking the performance of the GT.

The technical result obtained from the implementation of the invention is the elimination of the need for temperature measurements to determine the health of the GT.

This technical result is achieved due to the fact that the well-known GT containing a piezosensitive element, a transducer unit, a processing and registration unit, an electric equivalent of a piezosensitive element in the form of a resistor and a controllable switch made with the possibility of controlled connection to the input of a transducer block of a piezosensitive element or its electric equivalent while the output of the amplifier is connected by a cable to the processing and registration unit, further comprises a second resistor other electrical resistance, installed with the possibility of controlled connection to the input of the Converter unit.

The invention is illustrated in the drawing, which shows a diagram of the GT.

The hydrophone path contains an underwater part 1 and an airborne part 2 connected by a cable cable 3.

The underwater part 1 of the hydraulic circuit includes a piezosensitive element 4, a controllable switch 5 connected to a control unit located on the side of the hydraulic circuit (not shown in the drawing), a converter unit 6, two electrical equivalents of the piezosensitive element 4, made in the form of precision resistors 7, 8 resistance R ₁ and R ₂ with the possibility of a controlled connection to the input of the Converter unit 6.

The airborne part 2 of the GT includes a processing unit 9 and a registration unit 10, as well as a control unit (not shown in the drawing).

GT works as follows.

When checking the operability of the hydroacoustic path, the controlled switch is set so that a resistor 7 with a resistance R ₁ and then 8 with a resistance R _{2 is} connected to the transducer block 6.

известно. Тестовые сигналы на вход проверяемого ГТ подаются при одной и той же температуре.At the same time, test signals S ₁ (f, T) and S ₂ (f, T) in the form of Johnson thermal noise, the ratio of which $$\frac{S_{\mathrm{one}}\left(f,T\right)}{S_2\left(f,T\right)}$$

it is known. Test signals to the input of the checked GT are given at the same temperature.

и $${\tilde{S}}_2\left(f,T\right)$$

на тестовые сигналы и берется их отношение $$\frac{{\tilde{S}}_1\left(f,T\right)}{{\tilde{S}}_2\left(f,T\right)}$$

.In block 9 processing on-board part 2 responses $${\tilde{S}}_{\mathrm{one}}\left(f,T\right)$$

and $${\tilde{S}}_2\left(f,T\right)$$

on test signals and their relation is taken $$\frac{{\tilde{S}}_{\mathrm{one}}\left(f,T\right)}{{\tilde{S}}_2\left(f,T\right)}$$

.

диагностируется исправность гидроакустического тракта.With equal relations $$\frac{{\tilde{S}}_{\mathrm{one}}\left(f,T\right)}{{\tilde{S}}_2\left(f,T\right)}=\frac{S_{\mathrm{one}}\left(f,T\right)}{S_2\left(f,T\right)}$$

diagnosed serviceability sonar tract.

Unlike the prototype, this method does not require temperature measurements, since the ratios of the values of the test signals and their responses are taken.

This achieves the set technical result.

Claims (1)

A hydrophone path with a dismantleless test of its operability, comprising a piezosensitive element, a transducer unit, a processing and recording unit, an electric equivalent of a piezosensitive element in the form of a resistor and a controllable switch configured to connect to the input of the transducer block of a piezosensitive element or its electric equivalent, while the output the amplifier is connected by a cable to the processing and registration unit, characterized in that it further neighs a second resistor of another electrical resistance with the possibility of a controlled connection to the input of the converter unit.