SU1377001A1 - Apparatus for measuring horizontal opening of variable-depth trawl net - Google Patents

Abstract

The invention relates to industrial fisheries and is intended to provide synchronization of the measurement of the parameter of the horizontal opening of a cable obtained from vibrators with parameters. measured by a trawl probe, using the latter to control and transmit information and thereby increase measurement accuracy. For this purpose, a device for measuring the horizontal opening of the trawl, comprising a trawl probe 1, vibrators 2, 3 and an echo sounder transceiver system (EPPS) 4, contains a communication vibrator (B) 5 for interacting with the trawl probe 1. B5 is connected to the antenna valve 6, which is connected to the input and output of the synchronization unit 7, the second output of the latter is connected to the start input of the EPSS 4 and the start input of the counter of the counter (CP) 9. The EPSP 4 is connected to the vibrators 2 and 3, to the input of the CP stop account 9 and to the input Element entries 10 memories. The device also contains a generator of 8 pulses connected to the counting input of the CP 9, the output of which is connected to the memory element (EP) 19. The output of the EP 10 is connected to the output of the digital-to-analog converter And, the output of the latter to the modulator 13, to another input which included the output of the generator 12 connection. The modulator output is connected to the input of block 7. Il. 2. cl with so v about

Description

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one

This invention relates to industrial fisheries, namely, trawl parameter monitoring devices.

The aim of the invention is to provide synchronization of the measurement processes of the horizontal opening parameter of the trawl obtained from the vibrators and the parameters measured by the trawl probe, the use of the trawl probe for controlling and transmitting information and thereby increasing the measurement accuracy.

The device makes it possible to increase the measurement accuracy by 20–25% not by increasing the accuracy of the primary sensors, but as a result of synchronization of the measurements taken. As a result, there is no need to compare the measurement data with the parameters measured by the trawl probe for the same time interval, and the measurement accuracy is improved.

FIG. 1 shows the device with the placement of its elements on the trawl, a general view. in fig. 2 is a block diagram of the device.

A device for measuring the horizontal opening of the depth trawl (Fig. I) contains a trawl probe 1 fixed in the middle of the upper selection of the trawl, measuring vibrators 2 and 3 mounted on the wings of the trawl, as well as an echo trickle-transmitting system 4 which is located in the middle of the lower Trawl picks, the device also contains (Fig. 2) a communication vibrator 5, antenna valve 6, synchronization unit 7, pulse generator 8, expansion counter 9, memory element 10, digital-to-analog converter 11, communication generator 12 and modulator 13.

One of the outputs of the echo sounder transceiver system is connected to the vibrators 2 and 3, and the other to the counting stop input of the counter 9 and the recording input of the memory element 10. The communication vibrator 5 is connected to the antenna valve 6 and serves to receive the parcel pulse of the trawl probe 1 and transmit to the latter information about the horizontal opening of the trawl. The antenna valve 6, one output of which is connected to the communication vibrator 5, the other to the synchronous input, and the input to the output of the synchronization unit 7, serves to decouple the receiving and transmitting communication channels. The synchronization unit 7, the synchronous input and output of which is connected to the antenna valve 6, and the input and the sync output, respectively, to the output of the modulator 13 and the start input of the echo sounder transceiver system 4 and the start input of the counter of the open counter, as well as for controlling the transmitting measured information to the trawl probe 1. A pulse generator 8, the output of which is connected to the counting input of the opening counter 9, is designed to generate

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pulses of a given frequency and amplitude. The counter 9 is opened, the counting input of which is connected to the output of the generator 8 pulses, the start input is connected to the synchronization blocks of the synchronization unit 7 and simultaneously to the start input of the echo sounder receiving and transmitting system 4, and the output to the information input of the memory element 10, serves to count pulses, i.e. for trawl disclosure information. The memory element 10 0, the information input of which is connected to the output of the opening counter 9, the write input to the counting input of the latter and simultaneously to the output of the echo sounder transceiver system 4, and the output g to the input of the analog-digital converter 11, serves to memorize the trail opening code and transmitting it to a digital-to-analog converter 11. A digital-to-analog converter 11, the input of which is connected to the output of the memory element 10, and a turn 20 to one of the inputs of the modulator 13, serves to convert the measured information expressed The digital code into an analog signal. Communication generator 12, the output of which is connected to one of the inputs of the modulator 13, is used to generate sound oscillations of a given frequency. The modulator 13, one of the inputs of which is connected to the output of the digital-to-analog converter 11, and the other to the output of the communication generator 12, and the output connected to ,,, the input of the synchronization unit 7, is used to modulate the sound vibrations of the communication with the signal obtained during the measurement.

The device works as follows. After the depth trawl dives to a certain depth, trawl probe 1 begins to measure the vertical opening of the trawl, and the pulses of the "Down trawl probe 1" enter the communication vibrator 5 and through the antenna valve 6 enter the synchronization unit 7, in which a synchro impulse is generated, 40 serves to start the disclosing counter 9 and the echo sounder transceiver system 4. When a sync pulse arrives at the last input, a "Horizontal" impulse is sent to it, arriving at vibrators 2 and 3. After a certain the time corresponding to the horizontal opening of the depth trawl, at the output of the echo sounder transceiver system 4, an impulse appears that stops the counting of the opening counter 9, and the information from its output is recorded in the memory element 10. Received at the output of the last information about the horizontal opening of the trawl is fed to the input of the digital-to-analogue converter 11 and, in the converted form, is fed to the modulator 13, 55 associated with the generator 12 of the connection. At the same time, the modulated signal is fed to the input of the synchronization unit 7, from which, at a predetermined interval, enters the antenna valve 6 and then into the communication vibrator 5, which transmits the measured horizontal disclosure information to the trawl probe 1. The information is received from the trawl slug 1.

During the operation of the trawl, the pulses of the "Down Trawl probe I" for measuring the vertical opening of the trawl are followed with a certain frequency, therefore, the delay interval of information about the horizontal opening of the trawl is set on the basis that it is n times larger than the vertical opening. Thus, the cycle of operation of the device is determined from the ratio

D Tnft, where T-cycle operation of the trawl probe 1, s,

n is the number of times in which the horizontal opening is greater than the vertical;

t- T-time shift determined by the readiness of the trough 1 probe to receive, p.

The introduction of blocks 6-13 improves the accuracy of the horizontal opening measurement by matching its parameters, controlled by the trawl probe 1, and the installation of the vibrator 5 directed toward the trawl probe allows the measured information to be transmitted to the latter.

Claims (1)

Invention Formula A device for measuring the horizontal opening of a depth trawl, including a trawl probe, fixed 0 on the wings of the trawl, measuring vibrators and an echo sounder transceiver system, characterized in that, in order to ensure synchronization of the measurement process of the horizontal opening parameter of the trawl received from the vibrators, and parameters measured by the trawl probe, the latter is used to control and transmit information and enhance the body measurement accuracy, it is additionally equipped with a communication vibrator, an antenna valve, a synchronization unit, a pulse generator, a counter counter, a memory element, digital analogs a transducer, a communication generator and a modulator, 5, the communication vibrator is connected to the antenna valve whose output is tucked to the sync input and the input to the first sync output of the synchronization unit, the second sync output of the latter connected to the start input of the echo sounder air-transmission system one of the outputs of the echo sounder transceiver system is connected to the measuring vibrator, and the other is connected to the counting input of the counter and open one5 temporarily to the recording input of the memory element, the output of the pulse generator is connected to the counting input of the counter open, the output of which is connected with the information input of the memory element, the output of the memory element is connected to the input of the digital-analog converter, the output of the latter is connected to the input of the modulator, to the other input of which the output of the communication generator is connected, and the output of the communication modulator - with sync block input. 0