SU1514290A1 - Apparatus for monitoring the eating of combined fodder by fish - Google Patents

Description

The invention relates to industrial fish farming and can be used "YuVLN" in pond fish farms. The purpose of the invention increase

reliability of remote control of feed consumption. The device in the form of a table, once mixed in the water column and suspended from the floating frame, contains electrodes fixed along the aft table and connected to the control and measuring unit, which is equipped with an indicator of the presence of feed on the feeding table. 3 il.

The invention relates to industrial fish farming, and in particular to devices for monitoring the feed feed of fish in pond fish farms.

The purpose of the invention to improve the reliability of remote control consumption of feed.

The device contains a feed table suspended on a floating frame, electrodes for radiation and registration of an alternating electric field, in the zone of which the feed is placed.

Registration of changes in interelectrode resistance reflects the amount of feed on the table.

Radiating electrodes are connected to one of the diagonals of the measuring bridge connected to the alternator (generation frequency 1 kHz), and the measuring unit is connected to the other diagonal of the bridge, which includes the common electrode and the midpoint of the balanced potentiometer.

FIG. I shows the device, a general view; in fig. 2 is a diagram of a measuring unit, in FIG. 3 diagram of the measuring bridge.

The device consists of a floating frame 1. to which the corrugated feed table 2 is suspended on rods 3 On the table 2 perpendicularly to the direction of the corrugation, electrodes 4 and 5 are fixed, the height of which is the height of the corrugation of the table 2. Third

6 rigidly attached to the table 2 on racks

7 at a height equal to less than half the distance between the electrodes 4 and 5. Electrodes 4–6 are connected to the measuring point [8]. The device is fixed at the feeding point of the pond with an anchor 9.

The measuring unit (fig 2ι papses from the measuring bridge 10. To one bottom of which a signal lam kidney 13 is connected through the amplifier 1 1 and the threshold unit 12. The voltage from the alternator 14 is applied to the measuring bridge K)

The threshold device 12 is triggered at a given voltage value at the output of the amplifier II. A flashing lam bud is used as a signal lam bud 13. The amplifier 11, the threshold unit 12 and the generator 14 are powered from an autonomous power supply unit 15.

1514290 A1

1514290

The measuring bridge (FIG. 3) consists of a balanced potentiometer 16 having a midpoint that forms the two arms of the measuring bridge. Two other shoulders of the bridge include pairwise electrodes: one shoulder contains electrodes 4 and 5, and the other 4 and 6. Electrode 4 is common.

A generator 14 is connected to one diagonal of the measuring bridge to the terminals 17, and to the other diagonal through the terminals 18 an input of the amplifier 11.

The device works as follows.

The device is installed in the fish pond at anchor 9 on one of the feeding places. In preparation for work, the power supply source 15 is connected and the bridge circuit 10 is balanced by a potentiometer 16 so that there is no signal on the flashing lamp 13. Balancing is performed in order to balance the resistances between electrodes 4.5 and 4.6, which at the initial moment may slightly differ from one another.

In the absence of feed on the feed table 2, alternating electric current from the generator 14 flows in the circuit of the bridge circuit 10 and in the water between the electrodes 4-6. Due to the fact that the bridge circuit is pre-balanced, there is no signal on the flashing lamp 13. The imbalance of the bridge occurs when the water resistance between the electrodes 4.5 or 4.6 changes when feeding the feed. However, when the resistances between the electrodes change simultaneously by the same value due to the influence of water temperature, ionic composition, electrochemical reactions on the electrodes, etc. on them. the balance of the measuring bridge is maintained.

When loading, the feed is lowered and placed in the corrugation of the feeding table 2, thus being located between electrodes 4 and 5. Since the electrical conductivity of the feed differs from the electrical conductivity of water, the impedance of the medium between electrodes 4 and 5 changes dramatically, resulting in unbalance of the bridge 10 and the appearance of the input of the amplifier 11, triggering the threshold unit 12 and turning on the lamp 13. In order to save battery power, the lamp can operate in a pulsed mode at intervals of 2–3 minutes.

In the mode of feeding fish with feed '0, the flashing lamp 13 is working until

while in the corrugations of the feeding table 2 there is feed.

When a flashing lamp is in operation, the fish farmer can judge the food activity, 5 fish and quickly adjust the daily dose of feed delivery or take action

on cleaning the feed tables.

The proposed device allows you to make the operation of feeding fish in ponds more manageable and reduce costs · feed by at least 5%.

Claims (1)

Claim A device for controlling the feeding of 25 fish feed containing a floating frame, a feeding table suspended from it, a power unit, a measuring circuit and a recorder, characterized in that, in order to increase reliability, the aft table is made corrugated, and the measuring 30 circuit contains an alternator , amplifier, threshold unit, balanced potentiometer, two electrodes mounted on the feeding table perpendicular to the direction of the corrugation, the third electrode located above the table on the racks, while the first and third elec ode connected to a generator of alternating current and a balanced bridge, and the second electrode and the midpoint of the balance potentiometer - an amplifier whose output over a threshold unit connected with the registrar. FIG! 1514290 Phi 2