RU43370U1 - Diverter direction finder - Google Patents

Abstract

The utility model relates to devices for determining direction using sound and ultrasonic vibrations in an aqueous medium. The direction finder contains two non-directional hydroacoustic receivers, the outputs of which are connected to the inputs of the corresponding channels of two correlometers, each of which is represented by a multiplier and an integrator, and a signal delay block is included between the output of the receiver of one path and the input of one of the channels of the correlometer of the other path. The outputs of the correlometers are connected to the inputs of the processing unit, and the output of the latter is connected to the diver's phones. The technical result is the creation of a compact direction finder containing two sonar receivers, with the determination of the direction to the source by the tone of the sound signal in the diver's phones.

Description

The utility model relates to direction finders for determining directions using sound and ultrasonic vibrations in an aqueous medium.

Known direction finder for a diver according to the application RU 2002111457, IPC G 01 S 3/80, publication 10.11.03, which contains two receiving channels, each of which contains an omnidirectional antenna and telephones. The direction finder used the amplitude method for determining the direction of the object from the difference in the levels of sound signals generated in the right and left diver phones.

A device for determining the direction of the application JP 05-264708, IPC G 01 S 3/80, publication 12.10.93. The direction determining device comprises a two-element antenna, a correlometer, and an auxiliary calculator. The direction is determined by calculation based on a comparison of the correlation of the signals at the output of the phase processing circuit with the data obtained by the experimental calibration formula

The closest analogue is a device for determining the direction of the patent US 3947803, IPC G 01 S 3/80, publication 30.03.76. The device consists of three sonar receivers and three correlometers, the outputs of which are connected to a computer. The direction to the object and the distance to it is determined in the computer by the maximum correlation coefficients between the signals from the hydroacoustic receivers. The disadvantage of this device is the presence of 3 sonar receivers spaced in space and the lack of a system for determining the direction without the use of visual indicators.

The inventive utility model solves the technical problem of creating a compact direction finder for a diver with two sonar receivers, convenient to use and allows you to determine by tone

sound signal in phones direction to the source (object) emitting a noise signal.

The diver’s direction finder contains two omnidirectional sonar receivers consisting of an antenna and an amplifier and placed on a diver’s suit, mask or equipment, the outputs of which are connected to the inputs of the corresponding channels of two correlometers containing a multiplier and an integrator. Between the output of the first receiver and the input of one of the channels of the second correlometer, a block of time delay of the signal is included. The outputs of the correlometers are connected to the inputs of the processing unit, which contains two analog-to-digital converters and a microcontroller, and the output of the latter is connected to the diver's phones.

The signals received by sonar receivers are amplified and fed to correlometers. The voltage at the output of one correlometer is maximum when the source (beacon) is located on a line perpendicular to the line connecting the receivers (the so-called antenna base) and passing through its middle. The voltage at the output of the other correlometer is maximum when the source is on one of two lines located symmetrically at an angle from the line perpendicular to the line connecting the receivers and passing through the center of the antenna base. The magnitude of this angle depends on the magnitude of the time delay of the signal in the delay unit.

When detecting the signal, the diver first rotates in a horizontal plane to a predetermined direction, while the processing unit monitors the moments when the voltage at the output of the correlometers reaches a predetermined maximum value. When the maxima appear in this order: the 2nd correlometer / 1st correlometer, a sound signal is sent to the diver’s telephones indicating that the lighthouse is in front of it. This eliminates the use of directional sonar receivers (which is necessary to ensure underwater communication) bearing ambiguity ("front / rear"). Further, the diver floats in the direction of the lighthouse. At the same time, the processing unit generates an audio signal in the phones, the pitch of which depends on the voltage at the output of the first correlometer, which allows you to highlight the maximum correlation coefficient by ear, which corresponds to the direction to the source. When deviating from the direction to the source, the output voltage of the first correlometer decreases, changing the signal tone in the phones, and when the value is set, the processing unit turns off

sound signal. During a reverse turn in the direction of the lighthouse, the sound signal in the diver's phones turns on again. Thus, the "guidance sector" is formed.

Each sonar receiver contains a series-connected antenna and amplifier, while the output of the amplifier is the output of the sonar receiver.

Each correlometer contains a multiplier, the two inputs of which are inputs of the channels of the correlometer, and an integrator is connected to the output of the multiplier, which is the output of the correlometer.

The processing unit contains two analog-to-digital converters, the inputs of which are the inputs of the unit and a microcontroller, the inputs of which are connected to the outputs of the analog-to-digital converters, and the output of the microcontroller is connected to the diver's phones.

The utility model is illustrated by the drawings:

figure 1 is a generalized block diagram of a direction finder,

figure 2 is a block diagram of a correlometer,

figure 3 is a block diagram of a processing unit,

figure 4 - the location of the antennas on the diver and directional characteristics of the direction finder.

Diver's direction finder (Fig. 1) contains two sonar receivers 1, two correlometers 2, between the output of one of the receivers 1 and the input of one of the channels of one of the correlometers 2, a delay unit 3 of the signal is turned on, the outputs of the correlometers 2 are connected to the processing unit 4. Outputs are the processing unit 4 connected to the phones of 5 diver.

The receiver 1 consists of an antenna 6 and an amplifier 7 (Figure 1). Each of the correlometers 2 contains a multiplier 8 and an integrator 9 (Figure 2). Processing unit 4 includes two analog-to-digital converters 10 and a microcontroller 11.

The direction finder receives a noise acoustic signal, for example, from a lighthouse, using two antennas 6 spaced a predetermined distance from each other, with the formation of the so-called antenna base, and installed either on a suit, or on a mask, or on a diver’s equipment (Figure 4). The signals from antennas 6 are amplified in amplifiers 7. Next (Fig. 3), the signals are fed to two correlometers 2, where

stresses are formed proportional to the correlation coefficients. The signals arrive to the first correlometer 2 without delay, and to the second correlometer 2 * to one of the channels through the delay unit 3. The signals from the outputs of the correlometers are converted into digital form by analog-to-digital converters 10 and fed to the inputs of the microcontroller 11, where the logical processing signals and the formation of an audio guidance signal, which is received on the phones 5 diver.

The location of the diver 12, the placement of the antennas 6 on the diver are shown in Figure 4, where the direction-finding patterns of the direction finder in the horizontal plane are shown - rays 13 and 15 are formed by the correlometer 2, rays 14 and 16 are formed by the correlometer 2 *, and the angle between them is set depending on the time delay of the signal in block 3.

Claims (5)

1. Diver direction finder, containing two omnidirectional sonar receivers, the outputs of which are connected to the inputs of the corresponding channels of two correlometers, while a signal delay unit is connected between the output of one of the receivers and the input of one of the channels of one of the correlometers, the outputs of the correlometers are connected to the inputs of the processing unit, and the output of the latter is connected to the diver's phones. 2. The direction finder according to claim 1, characterized in that the sonar receivers are mounted either on a suit, or on a mask, or on a diver’s equipment. 3. The direction finder according to claim 1, characterized in that each sonar receiver contains a series-connected antenna and amplifier, while the output of the amplifier is the output of the sonar receiver. 4. The direction finder according to claim 1, characterized in that the correlometer contains a multiplier, the two inputs of which are inputs of the channels of the correlometer, and an integrator is connected to the output of the multiplier, which is the output of the correlometer. 5. The direction finder according to claim 1, characterized in that the processing unit contains two analog-to-digital converters, the inputs of which are the inputs of the unit and a microcontroller, the inputs of which are connected to the outputs of the analog-to-digital converters, and the output of the microcontroller is connected to the diver's phones.