RU1790360C - Electric fishing gear - Google Patents

Abstract

Usage: for catching and driving fish when lowering ponds into natural channels, take control samples for size and species groups of fish in marine and freshwater fish ponds, as well as in local electro-electric installations. SUBSTANCE: device contains electrodes, regulated power supply, inductor, storage capacitor, charge and discharge thyristors, triggering units connected to thyristor control electrodes, and a master oscillator with a variable resistor. The introduction of a variable resistor into the circuit of the master oscillator and an adjustable power source provides on-line control of frequency and voltage under frequently changing fishing conditions: types and sizes of fish, electrical conductivity of water. 1 ill.

Description

ate

WITH

The invention is intended for catching and driving fish while lowering ponds into natural channels, to take control samples of size and species groups of fish in fish ponds and coastal waters, and can also be used in local electro-fishing installations.

The aim of the invention is to increase the selectivity and expand the range of changes in the electrical conductivity of water in a reservoir,

The drawing shows an electrical diagram of the proposed device.

The electrical circuit of the device for electrolytic fish contains electrodes 1 and 2, a power supply 3, a choke 4, a storage capacitor 5, a master oscillator 6 with a variable resistor 6a, which allows controlling the frequency in a wide range (from 20 to 80 Hz), side 7 with a start unit 8 connected to its control electrode, a discharge thyristor 9 with a start unit 10 connected to its control electrode, a choke 11, a two-channel mode blocking unit 12, a voltage control unit 13, consisting of a high-voltage generator frequency 14 (2 kHz), AC driver 15, control signal assembly 16, AC amplifier 17 (150 to 300 V), high voltage rectifier 18, and feedback node 19, electronic relay 20, discharge monitoring sensor circuit 21, damping diode 22, constant voltage stabilizer 23.

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A device for fishing works as follows.

Before starting work, proceeding from the goals of fishing (by species and size groups) and the electrical conductivity of water (5 - 200 mS / m), the operating mode for the voltage of the alternating voltage amplifier 17 and, in particular, the generator 6 with a variable resistor 6a

When the electrodes 1 and 2 are immersed in the fished reservoir, after connecting the power supply 3 and the electronic relay 20 is activated, positive rectangular pulses are received at the inputs of the triggering unit 8 of the thyristor 7 and the triggering unit 10 of the thyristor 9, which are generated by the master oscillator 6, which is, for example, a timer chip.

The leading edge of the positive pulse opens the trigger unit 8 and generates a trigger pulse to the thyristor 7. The thyristor 7 is unlocked, charging the capacitor 5 through the inductance of the interconnector 4 from the voltage control unit 13. At the end of the charge of the storage capacitor 5, due to the inductance of the interconnector 4, the voltage at the storage capacitor exceeds the voltage of the voltage control unit 13. .. Block 13 is executed It has the following functions:

a high frequency generator 14 (2 kHz) sets the switching frequency when generating a high voltage. From the output of the generator 14, an alternating voltage with a frequency of 2 kHz is supplied to the input of an alternating voltage generator 15, which creates a sequence of rectangular voltage pulses (meander) with a frequency of 1 kHz shifted by 180 °;

the control signal generator 16 amplifies the voltage pulses supplied by the voltage at a frequency of 1 kHz to the value necessary to control the alternating voltage amplifier 17, which, depending on the required operating mode, generates an alternating voltage of 150-300 V at a frequency of 1 kHz.

An alternating voltage of 1 kHz is applied to the input of the high voltage rectifier 18, and with the thyristor 7 open, the rectified voltage is applied to the charge of the storage capacitor 5.

For the duration of the positive pulse, the trigger unit 10 is shunted at the input by a positive pulse. At the end of the positive pulse, the trigger unit 8 is closed, and after a period of time sufficient to fully restore the locking properties of the thyristor 7, the trigger unit 10 is opened.

The triggering unit 10 generates a triggering pulse to the discharge thyristor 9. A discharge capacitor 5 is discharged through the inductance of the interconnector 11 and electrodes 1 and 2, between which water is formed

electric field affecting fish.

With a short circuit of electrodes 1 and 2, the discharge current increases, which creates a voltage drop on the sensor 21,

superior value of the reference voltage of the blocking unit 12 and sufficient for its operation. The operation of the blocking unit 12 causes the locking of the charge and discharge of the thyristors 7 and 9. Strength chain

The charge and discharge are turned off. This eliminates the possibility of failure of the start nodes of the thyristors 7 and 9.

To eliminate the emergency state of the voltage regulating unit 13 when the electrodes 1 and 2 are short-circuited, the feedback unit 19 is introduced into the circuit of the unit 13. In the case of a short circuit, the current of the alternating voltage amplifier 17 increases sharply, as a result of which the feedback node

The coupling reduces the current of the driver of the control signals 16 and the output voltage of the amplifier 17 to the smallest value that cannot lead to the destruction of the thyristors 7 and 9, and the elements of the voltage control unit 13.

The constant voltage stabilizer 23 ensures the stability of the operation of the triggering units 8 and 10 of the thyristors 7.9 and the locking unit 12.

The diode 22, connected in parallel with the electrode 1, is a cut-off diode that removes negative surges of voltage on the inductor 11, which can disable the thyristor 9.

When electrodes are lifted from water, the conductivity in the interelectrode space sharply decreases, which leads to an increase in voltage, which becomes larger than the reference

electronic protection relay 20, and the power to the entire device is turned off.

The proposed device with a wide range of output parameters, provides high selectivity with respect to

sizes and types of fish and adaptability to various parameters of water, ease of use and transportation due to the small size.

Claims (1)

The claims A device for electrolytic fish, comprising electrodes, a power source, a choke, a storage capacitor, a driving generator, a charge and discharge thyristors, trigger units connected to control electrodes of a charge and discharge thyristors, characterized in that, in order to provide an increase 0 selectivity and expanding the measuring range of the electrical conductivity of water in a reservoir, a voltage control unit is additionally introduced, the first output of which is connected to the anode of the thyristor, the second output is connected to the start nodes, and the master oscillator is equipped with a variable resistor, while the outputs of the master oscillator are connected to inputs of launch nodes.