SU926612A1 - Signal processing device for quantitative evaluation of fish accumulations - Google Patents

Description

(5) DEVICE FOR TREATMENT OF SIGNALS FOR QUANTITY, MEASUREMENT OF FISH ACCUMULATIONS

one

This invention relates to electronic specialized computing devices used to quantify fish stocks.

A signal processing device for quantifying fish aggregations is known, comprising a block, controls, a recorder, a detector connected in series, a threshold block, an analog-to-digital converter and a quad and N control driver drivers are connected to the inputs of the corresponding N control pulse drivers GP

However, in the known device, the integration of interference signals occurs at time intervals when the received echo signal does not contain a component from fish aggregations, and the integration channel with control from this signal has a constant unregulated integration range, which reduces the accuracy of the estimation of fish clusters.

The purpose of the invention is to improve the accuracy of quantifying fish stocks.

The goal is achieved by the fact that in a signal processing device for quantifying fish stocks containing a control unit, a recorder, sequentially

10 connected detector, threshold unit, analog-to-digital converter and quadr and N control pulse shapers, with the outputs of the control unit connected to the inputs

15 corresponding N control driver formers, entered N chains i each of which consists of a serially connected key, delay unit, adder and counter

20 transfer units from the senior bit of the adder, with the quad output connected to the second inputs of the N adders, the output of each of the N counters

the transfer units from the senior bit of the adder are connected to the corresponding recorder input, the second output of each of the N adders is connected to the input of the corresponding key and the corresponding recorder input} and the outputs of the control pulse drivers are connected to the control inputs of the corresponding keys.

The drawing shows a structural electrical circuit of the proposed device.

The device contains detector 1, threshold unit 2, analog-to-digital converter 3, quad and N chains 5 each of which contains a counter of 6 transfer units from the senior bit of the adder, adder 7j delay block 8 and key 9 as well as control pulse drivers 10 , the recorder 11 and the control unit 12,

The device works as follows.

The beginning of the reception of echo signals in the preamplifier of the echo sounder is detected by a gating pulse, which is fed through bus 13 to control unit 12. Simultaneously with the arrival of a strobe pulse, the echo signal from the sonar receiver is fed via bus 1 to the input of detector 1, which extracts the echo envelope. The envelope signal from the detector output is fed to the input of the threshold unit 2, which implements the operation of the type of insensitivity zone with restoration. From the output of block 2, the echo signal is fed to the input of the analog-digital converter 3i in which the analogue envelope signal is converted into a parallel binary code with a clock frequency f, ..

The value of the sampling code of the envelope with the following frequency is fed to the input of the quadrant, from which the K-bit values of the square code of the envelope with the frequency fy are fed to the inputs of N chains S consisting of adder 7, the counter 6 units of transfer from the most significant adder 7, also block 8 delay and key 9. The integration is carried out with a single step of integration 1-bit code of the value of the square of the envelope of the echo signal is fed in parallel to the input of the adder 7 corresponding to one summable (bit variable, l is summed with the value of the integral in the previous integration step, arriving at the delay block 8.

the command Writing from the generator 10 to the delay unit 8, the sum value at the output of the adder 7 is entered at the end of the period h e the delay unit through the key 9. If there is a transfer unit signal in the high bit of the adder 7, the Record command reads it into the counter 6 transfer units. The presence of a sequence of command pulses. Recording in a certain time interval sets the required integration range. The installation of the required integration range is carried out on control buses from the control unit 12. The result of the integration operation, representing the value of the integral of the square of the envelope of the signal, comes from the adder 7 and the transfer unit count b to the register 11 for real-time display. Thus, introducing into each of the N channels of integration of the adder 7, block 8 of the delay of the integral value of one integral step, the counter of 6 transfer units from the higher bit of the adder 7, allows processing and transmission of information in each of the N channels of the integration in parallel binary code , and ultimately, significantly increase the accuracy of integration of echo signals by increasing the sampling frequency of the envelope values for subsequent processing in digital form.

The recorder 11 displays the digital information about the integral of the square of the envelope of the echo signals from the N integration channels.

Thus, the introduction of new blocks allows increasing the accuracy of quantifying fish aggregations.

Claims (1)

Invention Formula A signal processing device for quantifying fish stocks containing a control unit, a recorder, a sequentially connected detector, a threshold unit, an analog-to-digital converter and a quad and N drivers