RU1784154C - Device for control of trawl skewness - Google Patents

Abstract

The invention relates to the field of industrial fisheries, and in particular to devices for monitoring the characteristics of a trawl system. The device includes a symmetry sensor with a radiating-receiving system and sensitive elements, a communication channel and an on-board receiver-indicator / recorder of a trawl probe, and the on-board receiver-indicator / recorder of a trawl probe is equipped with time intervals (in units of distance) between the moments of arrival to the radiating-receiving system of the symmetry sensor of the response signals of the sensing elements, and the sensing elements are made in the form of acoustic receiving-transponders-depth gauges-repeaters with a form ers E gauge time gates that can be installed on the trawl doors. 2 ill.

Description

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The invention relates to industrial fisheries, and in particular to devices for monitoring the characteristics of a trawl, and is intended to control the symmetry of a trawl system in an aqueous medium directly in the process of trawling.

The purpose of the invention is to improve the accuracy and ease of use.

In the symmetry control device, the warp of the fishing trawl system, co; holding a symmetry sensor with

radiating-receiving system and sensitive elements, the communication channel and the on-board receiver-indicator / recorder of the trawl probe, the on-board receiver-indicator / registrar of the trawl probe is equipped with time intervals (in units of distance) between the moments of arrival at the radiating-receiving system symmetry sensors respond-- signals of sensitive elements, while sensitive

the elements are made in the form of acoustic transponders-depth gauges-repeaters with shapers of temporary gates of a manometric type mounted on trawl boards.

Figure 1 shows a device with the placement of its elements on a trawl system, general view; figure 2 is a block diagram of a device.

The skew control device of the fishing trawl system (Figs. 1 and 2) contains a symmetry sensor with a radiating-receiving system and sensitive elements, consisting of an acoustic radiating-receiving system 1 installed in the center of the upper selection 2 of the trawl directly at the trawl probe, an acoustic receiving a transponder depth gauge-transponder 3 with a man-made temporary strobe former mounted on one trawl board

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4, and an acoustic transponder-depth-transponder depth 5 with a former — a temporary gauge-type strobe mounted on another trawl board 6, a trawl chond communication channel 7 and an onboard receiver-indicator / recorder 8 of the trawl probe, including a receiver 9 , a circuit 10 for extracting signals from transponder-depth gauges-repeaters with time-gates for manometric type, a meter 11 of the time interval (in units of distance) between the moments of arrival of the si sensor to the transmitting-receiving system mimetry of the first response signals of acoustic transponders-depth numbers of repeaters, meters 12.13 time intervals (s units of distance) between the moments when the Symmetry Sensor receives the first and second response signals of each of the acoustic sensors we have o-transponders-gluPinomeres-transponders with formers of time gates of gauge type, dividers 14, 15 of the repetition frequency of the signal-pulses of the receiving-transponders-depth meters-transponders of 2, the circuit 16 for isolating the first response signals of transponder-depth transponders-depth gauges, a control circuit 17 for supplying said first response signals to the inputs of the beginning and final measurement of a time interval meter 11 between the moments of arrival of the first response signals, a circuit for generating skew direction indication signals and an indicator / recorder 19. The output of the transmitting-receiving system 1 through the communication channel 7 is connected to the input of the receiver 9 of the on-board receiver-indicator / recorder 8, the output of the receiver 9 is connected to the input of the reception-response signal extraction circuit 10 a number of depth-sensitive digital repeaters, the outputs of which are directly and through dividers 14, 15 of the signal repetition rate by 2 connected to the inputs of the measurement start and end time measuring devices 12, 13, respectively, through the First response signal extraction circuit 16 and the feed control circuit 17 these first response signals are connected to the beginning and end of the measurement of the measuring instrument 11 of the time interval between the moments of arrival of the first response signals of the transponder-receiver-depth gauges-repeaters, through the circuit 16 you ELENI first response signals and the circuit 18 generating a signal indicating skew direction are connected with the indicator / recorder 19 prmemni- ka-board display / 8 trawl regmstratora

the probe, the inputs of the circuit 16 for extracting the first response signals are also connected to the output of the trawl probe and to one of the inputs of the feed control circuit 17

the first response signals, the outputs of the meters 11,12, 13 time intervals are connected to the indicator / recorder 19.

The device operates as follows,

0 After the trawl is submerged to a certain depth, it starts to work according to the synchronizing signals of the trawl probe, i.e. emit sending pulses, the radiating-receiving system 1 on the carrier frequency fi.

5 The clock signals of the trawl probe are also provided to circuit 16, which opens. The sending pulses of system 1 are received by acoustic transponders-depth-repeaters 3.5 s with time-gates of manometric type and are emitted or backward at the same carrier frequency fi, but with different parameters (for example, in the form of code groups). At the same time or with

5 by a fixed delay (in order to ensure more rational energy characteristics of the device), which is then taken into account in the on-board indicator / recorder 19, each refractory transponder-depth transducer 3 and 5 emits sensing pulses up to the surface of the water.

The response signals of the acoustic receiving-transponder-depth gauges-retransmitters 5 or 3 and 5 are received by the radiating-receiving system 1 passing through the communication line 7 of the trawl zone to the receiver 9 of the on-board receiver-indicator / recorder 8 of the trawl probe

0 10 separation of signals of transponders-depth gauges-repeaters. From one output of the circuit 10, the response signals of the transponder-receiver-depth gauge-transponder 3 are fed to the inputs of the beginning of measurement from 5 gauge 12 and the divider. 14 signal repetition rates into two. According to the first response signal of the transponder-transponder-depth gauge-transponder 3, the meter 12 starts working, From the other output of the Yuotvetny scheme

0 signals of the transponder-transponder-depth gauge-transponder 5 are fed to the inputs of the beginning of the measurement of the meter 13 and the divider 15. According to the first response signal of the transponder-transponder-depth-meter-the-transponder 5 start response

5, meter 13 operates. Simultaneously with the outputs of circuit 10, the first response signals of the transponder-depth gauges, transponders 3 and 5 through the circuit 16 for extracting the indicated signals and the circuit 17 for controlling their supply are fed to the start inputs and

the end of the measurement of the meter 11. The circuit 17 provides the first of the response signals to the measurement input of the meter 11. and the second to the input of the end of the measurement of the meter 11. After receiving the second of the first response signals, the circuit

17 & the initial state is returned, in addition, a signal from its output closes circuit 16 until the next sync pulse of the trawl probe arrives at its input,

G outputs of circuit 10 first response signals of transponders-depth gauges-repeaters 3 and 5 through circuit 16 and circuit

18, the formation of the skew direction indication signals is also fed to the indicator / recorder 19 to display the skew direction of the indication of a certain sign, for example, the numbers 1 or 2. Depending on which of the first response signals arrived at circuit 18 before the other, on the indicator / recorder 19 a corresponding sign is displayed, for example, the number 1 or 2, indicating that the distance to the given transponder-depth gauge-transponder from the center of the top pickup is less than to the other.

As indicated earlier, after receiving the sending pulses of the transmitting-receiving system 1, the transceiver-depth meters-repeaters 3 and 5 emit sounding pulses up to the surface of the water. At the same time, gates are generated by their formers of temporary gauge-type gates, the temporary position of which from the moment of emission of the sounding pulses is determined by a manometric sensitive element depending on the depth of the corresponding trawl board. These temporary gates ensure the functioning of the receiving paths of acoustic transponders, depth gauges, repeaters only for a short period of time immediately before the arrival of signals reflected from the surface of the water. Thereby, a stable and reliable reception of the indicated reflected signals will be ensured and, accordingly, an accurate estimate of the relative vertical position of the trawl boards, i.e. symmetry of the trawl system in the vertical plane.

When 3 and 5 echo signals from the water surface are received by acoustic transponders-depth gauges-repeaters 3 and 5, they emit second response signals to the radiating-receiving system 1. However, in this case, they do not pass from the output of circuit 10 to the meter 11 , since the circuit 16 for extracting the first response signals is closed (as was indicated), but only to the inputs of the beginning of measurement of the meters 12, 13 (without changing the modes of operation, since the meters 12, 13 begin to function according to the first response signals ) and the inputs of the dividers 14 and 15. From the outputs divide s 14 and 15 on the two signals applied to the inputs completion of measurement gauges 12 and 13, respectively, which are zakanchiva0 measurement. From the outputs of meters 12 and 13, information is supplied to an indicator / recorder 19, which will display indications of the distance of each trawl board from the surface of the water, based on

5 of which the operator determines whether the trawl system is skewed vertically (since the trawl boards are connected by rigid steel cables to the net part of the trawl) and what is its magnitude.

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Thus, the device provides a more accurate estimate of the symmetry of the trawl system in the aquatic environment, due to the fact that with its help

5 a high-frequency estimate of the spatial symmetry of the fishing trawl system (namely, in horizontal and vertical planes), and greater ease of use due to the fact that the sensitive elements of the symmetry sensor are always installed in strictly fixed places - on trawl boards (i.e., not at points that the fishery needs to select for each trawl):

Claims (1)

5 Claims A device for controlling the skew of a fishing trawl, comprising a symmetry sensor with a radiating-receiving system and sensitive elements, a communication channel 0 and an on-board receiver-indicator is a trawl probe recorder, characterized in that, in order to improve accuracy and ease of use, an on-board receiver-indicator is a trawl zone recorder5 and is equipped with time intervals between the moments of arrival of the sensor Symmetry response sensitive signals. elements, and sensitive elements are made in the form of acoustic transponders-depth ditches-repeaters with shapers of temporary gates. non-metric type, moreover, the radiating-receiving system of the symmetry sensor 5 - connected to the communication channel of the trawl probe connected to the receiver of the on-board receiver-indicator-recorder, the output of the receiver is connected to the input of the signal extraction circuit of the transponders-depth gauges-repeaters, the outputs of the signal extraction circuit directly and through the signal frequency divider pulses are connected respectively to the inputs of the beginning and the end of measuring the time intervals between the moments of arrival of the first and second response signals of each of the transponder-depth meters transponders, and by means of a circuit for extracting the first response signals and a control circuit for supplying the first response signals of acoustic transponder-depth transponders to the inputs of the time interval meter between the moments of arrival of the first 7SZ response signals. tar-f 0 5 fishing and through the circuit for extracting the first response signals and the circuit for generating a signal for indicating the skew direction, are connected to the indicator-recorder of the on-board receiver-indicator - the trawl probe recorder, while the outputs of the time interval meter between the moments of the first response signals and time intervals between the moments of the first and the second response signals of each of the acoustic transponders-depth gauges-repeaters are connected to the indicator-recorder on-board receiver the indicator-recorder of the trawl probe. | J nz Ef