SU1244801A2 - Telephone communication device for underwater swimmers - Google Patents

Abstract

This invention relates to wire hydroacoustic communication. In relation to auth. No. 1166325 improves noise immunity by dividing the converted signal by frequency. The device contains on the transmitting part 1 g-r of the reference frequency 3, three blocks of coincidence (BS) 4.11 and 15, pulse counter 5, decoder 6, two switches 7 and I2, pulse-amplitude converter 8, time - defining block 9, threshold device JO, two power units 13 and 16, two acoustic transducers (AL) 14 and 17, microphone 18 and audio frequencies (34) 19, and on the receiving part 2 two AL 20s and 24, two preliminary yl 21 and 25, two amplitude de (L with N9 4a 4 00 fsj

Description

vector (AD) 22 and 26, two limiters 23 and 27, adder 28, pulse detector 29, linear filter 30, y-34 34, telephone 32 and two y-l with AGC 33 and 34. At the transmitting part 1 AP 14 and 17 emit acc. odd and even radio pulses, whose frequencies are different. This is achieved by separating the signals yo frequency. Next on

The invention relates to underwater hydroacoustic communication and can be used for telephone communication under water with aqualigistamp and chalk (diving scuba divers and is an improvement of the invention described in Aut. No. 1166325.

The purpose of the invention is new noise immunity by dividing the converted signal by frequency.

The drawing is an electrical block diagram of a telephone communication device for scuba divers.

A telephone communication device for scuba divers contains a non-irresponsible part 1 l receiving part 2. Transmitting part 1 contains a reference frequency generator 3, the first block 4 matches, a pulse counter 5, a decoder 6, the first switch 7, an amplitude-pulse converter 8, time 9 , threshold unit 10, second matching unit 11, second switch 12, first power amplifier 13, first acoustic transducer 14, third matching unit 15, second power amplifier 16, third acoustic transducer 17, microphone 18, first effort 19 sound frequencies. The receiving part 2 contains: the second Aukstish converter 20, the first preamplifier 21, nerves amplitude detector 22, the first limiter 23, the fourth acoustic converter 24, the second preliminary amplifier 25, the second. Amplitude detector 26, the second limiter 27, adder 28, pulse detector 29 , line filter 30, second sound amplifier 31.

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The receiving part 2 is filtering, detecting and transforming the signal, which ensures a constant level of sensitivity over a wide range of amplitudes of the RF signal. The goal is achieved by the introduction of BS 11 and 15, switch 12, y-Lei 16., 25 and 34, AP 17 and 24, AD 26, limiter 27 and adder 28. 1 Il.

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the telephone 32, the first amplifier 33 with automatic gain control (AGC), the second amplifier 34 with automatic gain control (AGC).

 The telephone communication device for scuba divers works as follows.

From the output of the reference frequency generator 3, the signal in the form of a meander is fed to the first input of the first block of coincidence 4, which opens at time T, ToN, where TO is the pulse following period, and N is the number of pulses. From the output of the first block 4 of coincidence, pulses are applied to the first input of the counter 5 pulses, which is triggered by ONLY at those times when potential 1 is present at the second input of the first block 4 of coincidence.

From the output of the counter 5, the pulses are sent as binary code to the decoder 6. After the arrival of N pulses, the output of the decoder 6 generates a reset pulse, which is fed to the second input (zero input) of the pulse counter 5 and translates it to its original state. The reset pulse is also fed to the first input of the first switch 7, performed on a D-flip-flop. The first switch 7 controls the operation of the first block 4 of the coincidence and the amplitude-pulse converter 8. The reset pulse coming from the decoder 6 affects the first switch 7 so that at its first output appears –potential 1, and at the second inverse output - O.

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The latter closes the first block 4 matches.

The amplitude-pulse converter 8 produces a constant voltage, which is superimposed on the alternating voltage coming from the microphone 18 through the first audio frequency amplifier 19. This happens only at the moment when the potential O appears at the first output of the first switch 7. At this time, the capacitor charges the time of the master unit 9. When potential I appears at the first output of the first switch 7, the charge stops and the capacitor starts to discharge. the time of master unit 9 to a certain zero level at which the output of the threshold device 10 forms a voltage drop from potential 1 to potential O,

These voltage drops are applied to the second input (installation input zero) of the first switch 7 ri and are controlled by its operation. For example, when applying to the second input of the first switch 7 by snapping O, a potential O occurs at its first output, and at the second inverse output, a voltage is applied to the second input of the first block 4 and opens it. As a result, a series (burst) of pulses appears at the second and third outputs of the pulse counter 5, which is fed to the first input of the second coincidence unit 11 and to the second input of the third coincidence unit 15. At the second output of the first switch 7, a sequence of pulses is formed, the kotor arrives at the input of the second switch 12. The second switch 12 operates in such a way that when a pulse is applied to its input, a potential changes at its outputs. The signals from the outputs of the switch 7, acting on the first input of the second coincidence unit 11, create a resolution for the passage of a burst of pulses to the input of the first power amplifier 13, and, affecting the first input of the third coincidence unit 15, prohibit the passage of the packet 15 pulses to the input of the second power amplifier 16.

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 Thus, the nepBbrfi acoustic transducer 14 emits, for example, odd. Radio pulses, and the third acoustic transducer 5. 17 emits even radio pulses, and the frequencies of these radio pulses are different. This is achieved by separating the iffle of signals by frequency. Next, the receiving part 2 filters,

10 detecting and converting the signal, providing a constant level of audibility in a wide range of amplitudes of the high frequency signal,

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Claims (1)

Invention Formula Telephone device for scuba divers, auth.St. No. 1166325, 20 characterized in that, in order to improve noise immunity by dividing the converted signal by frequency, the transmitting part of the second pulse counter is connected to the input of the first power amplifier through the input second matching unit, the second input of which is connected to the first output of the input second switch second exit 30 which is connected to the first input the inputted third coincidence unit, the output of which is connected to the input of the inputted second power amplifier, the output of which is connected to the input of the inputted third acoustic transducer, the second input of the third block. This coincidence is connected to the third output of the pulse counter, and the input of the second switch is connected to the second 40 by the input of the first coincidence unit, and in the receiving part, the output of the first limiter is connected to the input of the pulse detector through the input summer, the second input of which is connected 45 with the output of the input of the second limiter, the input of which is connected to the output of the input of the second amplitude detector and the input of the input of the second amplifier with automatic automatic amplitude control (AGC), the output of which is connected to the first input of the second preamplifier, the second input is connected to the output of the fourth 55 of the acoustic transducer, and the output of the second preamplifier is connected to the input of the second amplitude detector.