FISRÈRIES RESEAROR BOARD OF CANADA

Translation Series No. 1807

Positioning' and sorting of fish according to their size with the use of electronic means

by N.M..Zhogov and G.V. Popkov- r

Original title: Orientatsiya i sortirovka ryby po ragmeram s ispolzovaniyem elektronnykh sredstv

From: Trudy Polyarnyi Nauchno-Issledovatel'skii i Proektnii Institut Morskogo Rybnogo Khozyaistva i Okeanografii im. N.M. Kniponicha (PINRO) (Proceeengs of the Polar Research Institute of Marine Fisheries and Oceanography), Murmansk, 24:100-118, 1969

Translated by the Translation Bureau( GNK) Forefgn Languages Division

Department of the Secretary . of State of Canada

Fisheries Research Board of Canada Halifax Laboratory

Halifax, N.S.

1971

25 pages typescript

CANADA

ENGLISH - TITRE ANGLAIS

Positioning and Sorting of Fish according to Their Size with the Use of Electronic)Means.

Title in foreign laaguae-- (tranalit6,1—atio_f_ar-Ed.gmr-charactera) Orientatsiya i sortirovka ryby po razmeram s ispolzovaniyem •lektronnykh sredstv.

TULE IN

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Dr. L.W.Regier .

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Aueust 4th, 1971.

ieÊ d 7 . .

DEPARTMENT OF THE 'SECRETARY OF STATE TRANSLATION BUREAU

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English AUTHOR - AUTEUR

N.M.Zhogov and G.V.Popkov..

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Trudy Pinro.

REFEREN CE IN EN GL ISH - RÉFÉRENCE EN ANGLAIS

.Transactions of the Arctic Research and Planning Institute fàr Marine Fishery and Oceanography.

. REQUESTING DEPARTMENT MIN ISTÉRE•CLIENT •

Fisheries and Forestry TRANSLATION BUREAU NO. 0671 NOTRE DOSSIER N°

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DATE COMPLETED [OCT 1 3 1971 ACHEVE LE

UNEDITED TRANSLATION Fcr information only

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.PEPARTMENT OF THE SECRETARY OF STATE

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FOREIGN LANGUAGES DIVISION

CANADA

SECRÉTARI AT D'ÉTAT

BUREAU DES TRADUCTIONS

DIVISION DES LANGUES ÉTRANGÈRES

CLIENT'S NO , N° DU CLIENT

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BUREAU NO, N° DU BUREAU

0671

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Russian

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GNK

DATE

,OCT 13 19 71

Positioning and Sorting of Fish according to Their Size with the Use

of Electronic Means.

By N.M. Zhogov. and G.V. Popkov

TRier.;LATION

intriîi,1:Àc‘n Only

TR>ADUCHON NON REV1SEE

, informai. ion seulement:

(From: "Trudy Polyarnogo nauchno-issledovatelskogo I proektnogo

instituta morskogo rybnogo khozyaystva i okeanografii im. N.M. Knipovicha

(PINRO)," /Transactions of the Arctic Research and Planning Institute

for Marine Fishery and Oceanography/, No. 24, 1969.)

At - the present time ., large,fish is manually loaded into the fish-

processing machines of a vast majority of types. Many fish-processing machines

(for example, the fish-cutting machines) tequire the loading of strictly ,

positioned fish (i.e. with their heads and backs in a certain direction),

• sorted out in size groups. . -

• Fig. 1 shows one of the most possible.diagrams of an automated

line of fish (cod, océan perch) feeding into a.fish-cutting machine.

SOS-200-10-31

Here it is assumed that the fish-cutting machine is universal

(in other words, can cut both cod and ocean perch). Incidental fish,

in the present case, constituted something in the order of 10% of the

total amount of fish caught in the trawl. Evidently, it will be

inexpedient to install additional devices to sort thé incidental fish

out, since such a device will be rather complicated.

Thus, the fish cornes from the trawl and into the measuring bunker.

The incidental fish is sorted out manually, while the remaining fish

(cod, ocean perch), depending upon its quantity in the trawl (per one

trawling) and upon the capacity of the production line is, either •

processed prior to the raising of the next trawl, or is accumulated in

the bunker until the next trawlings. In the first instance the fish

must enter in small batches the individual feeder from w4ich it is fed

individually into the sorting and positioning device, and from there

. it is fed into the fish-cutting machine. The batching (or measuring)

operations and the individual feeding are planned to be carried out by

mechanical methods, while the sorting and positioning, to be carried out

by means of electronic devices.

• Several mechanioal methods are known' for fiSh pOsitioning / p. 102

with the head and belly into a.given direction. Some of these methods

(positioning during the sliding along a Sloping surface, along a conical

or spiral surface, along a rotating cone etc;) were used in.practiCe for

small fish and gave satisfactory results. However, the use of these • •

methods for the positioning and sorting of large fish requires a

Fig. 1. 1. - measuring bunker; 2 - individual feeder; 3 - device sorting fish according to size; 4 - device positioning fish with its head into the required direction; 5 - device positioning the fish with its belly into the required direction; 6 - distributing device.

considerable increase in the dimensions of the devices. In order to change

the final position Of the fish, or to change the dimensional range of the

sorting, it is nècessary to redesign the construction of the entire

installation. These defects led to the fact that at the Present time

there is no reliably operating device in the fish-processing industry

for the sorting of large fish according to size and required position.

'A method.for sorting fish according to size and its Positioning

prior to its,loading into the fish-cutting Machine by means of electronic

devices, developed by PINRO (Arctic Research Institute for Marine

Fisheries and Oceanography) is described below. The entire process may

bè subdiVided'intO the , following stages: •

, 1) . Feeding - of ,fish into the sorting and positioning devices. '

• '2YDetermination of size and position of fish in the installations.

• _ '3). Separation.of the dimensional groups and placing of fish in

-• therequired position. • •

.,:The.firWt„atage may be carried out mechanically,2for exampie, . • ,

.' - bÿ means :of .a band conveyor with boxes attached to it that can contain

Only one individual .fish at a time. Falling into the box the fish is

• subjectedthe first step in the positioning, namely, xiith its . .

•vertebralliaéaiong the box (but with an indiscriminate position of . . .

' .head.and.back) and the fish is.brought out to the receiving tray of the- -

- sorting device , (fig. 2).

•

The second and the third stages . contain the folldwing tasks: • , .

1.TO.determine•the body length of the fish:

a).to let , thefish into the positioning device, if the length

of the fesh is within.the range for which the•machinels set; • •

• bYtO:sOrt'out'the fish outside the size range.

. . . . • 2.,TO determine the position of fish coming from an individual •

'-. feeder:

•. .

. - . - a) tolet the fish through into the separatini deviCe, if its

.:position is asirequired;

mm7e1171,7,,,,,„... ..,-. ■ .. ,..,?,,,.;,:;),,y .:. ,,..;:,,,,- £1....-,,,7i- ,,,,. --- .-1,-, y.2,;,....;,,•,,,.'.Y.;,,,• ; , ';:.: .,:,.....,•'.,i',.'.0 5 ,,'"?,-,.,; ,'»'. .. -- "•: ',''' '''

. ' ,,',,.. ''... ,-,::: ,-.',..:i.-:•. --,i. ' . v:1';:" ..'s-, - .. -." ' ::." .':" 2 , :''' , . • . . . . . . , , . . . . . .

•..

• . . . • • . .•

/ p. 103

Fig. 2. The simplified general diagram of the performing mechanism.

b) to turn the fish with the head into the proper direction,

if *ts position does not correspond to the required one, and then to

let the fish pass to the separating evice;

:.•: , , . . '

. . . . .

• • • , . . . . . .. . . . , . „ . . . ..

. . . . , . ' •

. .. • • •

. - . • . ... . . . . . , . .. . . . , . .

. . .

7fr.em.r.Ï.mtemmgel:m745 7•

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c) to turn the fish with the back into the required position,

if its position does not correspond to the required one, after this

operation the fish must be let through to the - separating device.

This task is successfully solved by using such branches of the

radio-electronics, as thameasurement of non-électric values of the

electric methods. . ' .

The contemporary electrometric technology has measurement

methode of.electric values, that are Sound arid convenient in the .

eipeÉimental respeét. Thanks to considerable advantages of the electricé-

Metric methods (high accuracy and sensitivity; ensurance of remote .

measurement etc..), lately the indirect measuring methods receive wider

and Wider application; these methods consist in the well-defined conversion

of the non-electric Value into the electric one with its àubsequent

determination. The :conversion of the 'non-electric values into electric;

on is carried out by ,means of deviceà, which .it is customary to call

Usensorà", or "converters". Thé type and design of a sensor is determined

by the.required conversion, 1.e. by the trahsformables . of the input

electric value and .of the output electric one./1 to 7/.

* 'Ihe input non7electric values-of the sensors may be:

a) mechanical,

b) physical,

c) chemical,

d) organic values.

In particular, when developing the electronic device for sorting

and positioning of fish as input non-electric values that are converted

into electric Ones were.accepted: / p. 105

a) mechanical values, suCh as the difference in linear dimensions

of a fish body, form change of a fish body along its length, asymmetric

location of the centre of-gravity;

b) physical values,' such as difference in the colouring and in ••

the reflectivity of the surface of fish body. •

Among the most.important requirements frum the sensors the

following ones may be stipulated:

1. Sensitivity S, which is . determined as the ratio of.the increase

in the output value M to the corresponding increase in the input

value H: . S H

• 2..Possibility to obtain continuous dependance of the output

value from the measured input value.

3. Accuracy of conversion.

4. The required range of changes in the measured value.

Convenient concordance with the measuring equipment.

6. The sensor must not show a material reverse effect upon

the measured non-electric value..

7. The sensor must have low-inertness.

The existing sensors may according to their operational principle

be classified as:

a) meèhanical sensors, ,

b) electrical sensors (inductionsensors, screen sensors,

Capacity sensors, electronically parametrical sensors, thermoelectric

sensors and peizoelectric sensors),

c) pneumatic sensors,

d) optical:sensors,

e) radiational sensors,

f) electro7contact sensors.

Taking the marine conditions of the operations .into consideration,

the most suitable ones, we believe, are the radiational and the optical

sensors. Their main advantage is the ability to convert the input non-.

electric values without having any direct contact with the measured

objects. As a rule, these sensors operate within a wide range of

temperatures, they have low inertness, they are sufficiently sensitive,

and with a special design they may operate under conditions of high / p. 106

humidity. Their service time is practically unlimited.

Sorting of Fish according to Size.

For the determination of the size of fish and for the checking

of its position the proposed device contains photoelectric sensors (by

the term "photoelectric sensor" is understood an illuminator with a photo-

receiver). We have three groups of such sensors:

1. Sensors for measurement of the length of a fish (fig. 2 and 3).

2. Sensors for determining the position of the head of a fish (fig. 4).

3, Sensors for determining the position of the belly of a fish

(fig, 5).

8 .

Sensors for the measurement of the length of a fish are located

at the receiving tray (fig. 2) of the sorting and positioning installations.

By means of these sensors the sorting of • fish according to size is

carried out: the fish with the size within the limits of the dimensionaL

range is let through and the fish outside of this range is thrown aside.

On the movement path . of the fish (above the bottom of the

receiving tray) three photoelectric sensors are installed (fig. 2, 3).

The altitude, at which the sensors are installed, is chosen so that the

fish, when passing, • could cover the light beam falling upon the photo-

. resistance with its minimum width (at the tail fin). The distance between

the sensors is chosen on the basis of the size range to which the given

fish-processing machine is set. The distance between the extreme sensors • .

determines the maximum size in the range of the fish being processed.

The distance between the extreme sensor (the one closest to the entry

valve) and the central one is the miniuum dimension of the range.

Three instances are possible here: •

1. The fish covers with its body only one sensor (the one closest

to the entry valve).

2. The fish covers the first sensor (the one closest to the entry

valve) and the central one.

3. The.fish covers all three sensOrs.

,

Fig, 3. Sorting of fish aeoerding to its size.

---.T.-J.

1/7///17/7/////71/M/////77/7///i iiiittvt/

.:. D i •

Tcp

Fig. - Positioning ofjfish ("head - tail") .

/ p. 109

Fig. 5. Positioning of fish -("belly - back") .

12,

/ p. 110

Let us discuss the operation of the functional diagram (fig. 6)

for each of the three cases. Photoelectric sensors No. 1, 2, 3 are

elements of the detail sorting the fish according to size. The logical

diagram of the detail consists of forming links, coincidence circuit

(rheostate-diode diagram of the logic'for the 2 to 4 input), inverting

links, differentiating chains, electronic time relays, coordinating chains

and of aétuating chains by means of the actuating mechanism drive.

Fig.6.f . runctional diagkam of the sorting of fish according to size.

14. •

Symbols in the diagram:

1. • Photoelectric sensor No. 1. 2. Shaper No. 1. • 3 4 Coincidence circuit No. 1. 4. Invertor No. 1. 5. Differentiating chain. • 6. Delaying multivibrator No. 1. 7. Emitter- follower No. 1. 8. Transistorized key No. 1. 9. Drive of the actuating mechanism No. 1. 10. Photoelectric sensor No. 2. 11. Shaper No. 2. 12. Invertor No. 2. 13. • Coincidence circuit No. 2. 14. Invertor No. 4. 15. Differentiating chain. •

16. Delaying multivibrator No. 2. 17. Emitter follower No. 2.

•18. Photoelectric sensor No. 3.• 19. Shaper No. 3. 20. Invertor Na. 4. 21. • Coicidence circuit No. 3. 22. Invertor No. 5. 23. Differentiating chain. 24. Delaying multivibrator No. 3. 25. • Emitter follower No. 3.

The first'case. The fish covers with its body one sensor only

(the 'length of the fish corresponds to the'lower limit of the size range). -

When Covering the light.beam falling upon the sensor No. 3, the

signal (high level) enters along the input 2 the coincidence circuit

No. 3. Simultaneously along the input 1 enters a low level of signal to

the coincidence circuit No. 3 from. the shaper No. 1. The coincidence circuit

No. 3 is the circuit "And!' for the hikh levels, and this. circuit is

planned for two inputs, therefore . thé implementation of the cOincidence

.of the high -levels of•the'signal does not take place in the given case. •

15.

When light beam falling upon sensor No. 2 is covered, the signal

(the high level) from the shaper No. 2 enter along the input the coincidence

circuit No. 2. Simultaneously along inputs 3 and 4 enter the high levels

of the signal, from the invertor No. 4 and from the emitter follower 3. / p. 111

The coincidence_circuit No. 2 is an "And" circuit for four inputs of

high levels, in the given case the realization of the coincidence of the

high levels of the signal does not take place.

When the fish covers the light beam falling upon the sensor No. 1,

the high level of the signal from the shaping link for input 1 enters

the coincidence circuit No. 1, which is calculated for three inputs. By

this time along the inputs 2 and 3 from the invertor No. 2 and from the

emitter follower No. 2 high levels of signal are given. In such case takes

place an implementation of the coincidence of the high levels of the

signal.

From-the coincidence circuit No: 1 the signal goes into invertor.

No. land after being differentiated by.the differentiation chain, it

starts, the delaying multivibrator'No. 1. .The delaying multivibrator

is set on time necessary for the throwing off of the fish from the .

receiving tray. The signal from the multiVibrator starts by means of the

emitter follower No. 1 the transistorized key No. I, a relay serves as the

load for-the latter in the collector chain. The control eleetrode of the

silicon gate is commutated by the contacts of the latter relay. Silicon'

controlled gate feeds the power chain of the actuating mechanism, which

throws . qiè fish off the reCeiving tray.

16.

• Second case. The fish covers the first and the middle sensors

. No. 1 and 2.

When the light beam falling on the sensor No. 3 is covered, the

.signal (high level) from the shaper No. 3 enters the coincidence circuit

No. 3. Simultaneously after the invertor along the input 3 a low level

of the signal enters the coincidence circuit No. 2. Here the coincidence

circuits No. 3 and 2 do not .carry out coincidence of the high levels,

because along the input 1 a low level signal is given from the shaper

No. 1, while along the input 3 from the invertor No. 4 comes a low level

of signal to the coincidence circuit No. 2.

. When thelight beam falling on the sensor NO. 2 is covered, the

signal from the ghaper No. 2 enters along the input 2 to the coincidence

diagram•No. 2.* Simultaneously from the invertor Nô. 2 the signal (low d

level).enters along the input 2 the coincidence circuit No. 1. Thus, / p. 112

when .the sensors No. 3 and 2 are covered simultaneously, then the

coincidence circuits No. 1, 2 and 3 do not implement the coincidences of

the high levels of the signal.

During the subsequent movement of fish along the bottom of the

receiving tray the light beam falling on the sensors No. 2 and 1 is covered,

and the light beam falling on the sensor No. 3 is uncovered. The high

level of the signal from the shaper No. 1 enters along the input 1 to

the coincidence circuit No. 2, along the input 2, however, a similar signal

enters from the shaper No. 2 into the coincidence circuit No. 2.

With an open sensor No. 3, from the invertor No. 4 and from the

emitter follower No. 3 there also come high levels of signal to th

coincidence circuit No. 2. In this case the coincidence circuit No. 2

implements the coincidences of the high levels of the signal. The signal

from the coincidence circuit No. 2 inverts, differentiates and starts with

the fore front of the differentiated impulse the delaying multivibrator

No. 2 (electronic time relay) from the output of which the low level of

signal enters through the emitter follower along the input No. 3 into the

coincidence circuit No. /TR: No. illegible/ blocking the coincidence

circuit No 1 for the passage time of the fish of the distance equalling

the length of the esh: In such a case the actuating mechanism is ensured.

Third case. The fish covers all the three sensors (the size of the

fish exteeds the - upper limit of the size range).

• When the light beams falling on the sensors No. 3 and /*)/ are

covered the passage of the signal from these sensors will be analogous to

the one described in the first and in the second cases. In the moment when

the light beams of the threesensors are covered, the coincidence circuit

No. 3 implements the coincidence of the high levels of the signal, because

along the input 2 the high level of the signal enters from the shaper No. 3,

and along the'input l i identical signal enters from the shaper No. 1..

Here the signal from the coincidence circuit No. 3 inverts, differentiates

and starts with-the fore front the differentiated inpulse the delaying

multivibrators No. 1 and 3. The delaying multivibrator No. 3 is set for the

passage time of. the fish of the distanbe from the sensor No.. 3 to the

*)TR: second . number is. illegibleî.

18..

• sensor No. 2. When the fish passes the sensor No. 3 the delaying multi-

vibrator No. 2 starts, the latter is set for the passage time by the fish

of the distance from the sensor No. 2 to the actuating mechanism. The / p. 113

delaying multivibrator No. 2 will only start, when the.sensor No. 3 •

will be uncovered and the light beams falling on the sensor No. 2 and 1

will be covered. The signal from the delaying multivibrator No. 1 leads

to the response from the actuating mechanism, which throws off fish from

the receiving tray analogously to the first case. •

Positioning of Fish with the Head into the Required Direction

• It is possible to determine the correctness of the position of the

fish body sliding .'àlong the tray by using two photoelectric sensors

arranged one above the . other or-side by side, but at different . altitudes.

The, principle.of the determination, namely, whether . the fish is moving

with its head ar its tail first, is explained in fig. 4.

. The senéor No, 5 is set at such an altitude above - the bottom of

the tray ecing whièh slides the fish,. that the fish would always be capable

to cover the light beamlalling upon the . sensor by means of its minimum

width (the "thickness" at the caudal fin). The sensor No. 5 is the "basic"-

one, when coveting,the light - beae falling upon it, it introduces for a

brief period of time the.sensor No. 4, which is installed higher' than the

.plane running (if drawn mentally) through the spinal.cord and thé dorsal

fins of a fish of,minimum size.. Hete tWo cases,are possible:

'1. :The position of the head of the fish corresponds to the sliding

direction, hoth sensors'are covered. t •

19.

2. Direction of the caudal fin of the fish corresponds to the

sliding direction, only one sensor is covered.

Let us discuss'the operation of the functional diagram in both

cases (fig. 7).

First-case, both sensors are covered.

Signals from the sensors No. 4 and 5 enter through the shaping

chains the coincidence circuit of high levels No. 4, which is calculated

for two inputs. Here the coincidences of the high levels are implemented.

The signal from the coincidence circuit is differentiated after the invertor

No. 6 and starts with its fore front the differentiated impulse the delaying

multivibrator No. 4, which is necessary if the actuating mechanism is / p. 115

arranged at a certain distance from the sensors No. 4 and 5. After a

certain period of time, to which the delaying multivibrator No. 4 is set,

the delaying multivibrator No. 5 is started (it is started by the rear

front of the differentiated impulse from the delaying multivibrator No. 4).

The multivibrator No. 5 is set for the time required to turn the fish 1800 .

Promu the delaying multivibrator No. 5, through the transistorized key

No. 2, the signal starts the actuating mechanism No. 2 which turns the fish

in the vertical plane by 1800 .

Second case, only the sensor No. 5 is covered.

Here the signal from the sensor No. 5 is differentiated through

the shaping chain No. 5 and starts with the fore front of the differentiating

impulse the delaying multivibtator No. 6, which supplies for a definite ,k

period of time the feeding to the shaper No. 4 through the transistorized•

l'eactional.diagram of fish positioning ehead 7 tail". :13CiaitiOning).

Symbols in the diagram:

photoelectric sensor No. 4. Shaper No. 4. CoincidenCe circuit No 4. In*error No. 6. lefferentierini chain, " Delleing mulrivibrator No. 4, .eeferseriering chain. teeenS,mult4veretor No. 5. Xranststorpted key No. 2. "

1>?te,àieètrie sensor No. 5. ShaperNo. 5. DIfferseiatint chain. .t re'01een# mativihrator No. 6.

Xransie:tozikedskeY No, 3. • Devi of the etuatinS mèchanism,

C

lçey - :No,, 3. If during this time no signarwill come from the sensor . Ne.

bridge(fig. 5, • 8 • .

H • F4,11;8.-nctionaldiagram of the positioning,of fish ("belly- ' : . baCk"petitionieig). •

6. Differentiatingchain. .7. • Delaying multivibrater -

No. 8. . 8. :TransiStorized,key-No..4. 9: Drive of the actuating .•

.mecbenism No.. 3,

•Maiesuriagl3ridge. .Emitïérlônower No 4. Tir4eettNA.. 7. • Diffataptiating chain. ) IDelayineeuidvibratôt No ,

:then the low level signal will come from the shaper

Coincidence circuit No: 4 end the implementation of

: the highlevela:oethe signal will nôt take place,

:meehaniat:id . laft: without current. •

No. 4 to the

the coincidence of

.e. the actuating

The Poaitioning of Fish with the Belly in a Given Direction

It is possible to determine the direction in which the belly

is turned cf a fish sliding along the tray by utilizing for this purpose

the difference in colour between the back and the belly, that will say,

by utilizing the différence in the reflectivity of these parts of the

fish body. The determination operation is carried out by the photoelectronic

Meeed. »e beam of light is directed .to the belly or the back of a fish

(ced); this beam, when reflected, hits the sensor of the measuring

22.

In the case, when the intensity of the reflected light beam / p. 116

is high, i.e., when the light is reflected from the belly (at an

exposure of 6000 luxes at a distance of 250 millimetres from the body

of a cod, the intensity of light reflected froM the belly of the fish

• is within the limits of 20 and 70 luxes, and the intensity of the light

reflected from the back is from 8 to 15 luxes), the signal enters the

invertor No. 7 from the measuring bridge through the emitter follower

No. 4, it is differentiated and starts with the fore front of the

differentiated impulse the delaying multivibrator No. 7. The delaying

multivibrator is nedessary in a case, when the actuating mechanism is

at a certain distance from the measuring bridge. The signal from the

delaying multivibrator No. 7 starts with the rear iront of the differentiated

impulse the delaying multivibrator No. 8, which is set for the time

.required for the turning of the fish with its belly to a position opposite

to• the initial one. The delaying multivibrator N. 8 feeds the drive

of the actuating mechanism No. 3 through, the transittorized dey No. 4. •

. If the fish is turned with ità back te the sensor, the . intensity •

of the reflected light from thellack is low. The high-level signal comes .

from the measuring bridge, this signal *enters the invertàr No. 7 through '

the emitter follower No. /illegible/. The inliertor No. 7 functions

simultaneously as the discriminator of the low level amplitude .. In this -

case there is no inversion of the signal. The actuating mechanism No. '3

is . left without cùrrent. The fish is transported to the fish-cutting

machine.

23.

Actuating mechanism

The actuating mechanism sorting away the fish, the dimensions of

which fall outside the.size range, is designed as a'mobile bottom 28

of the receiving tray 24 (fig. 2). The signals from the sensors 26, 27

and 30, after implementation in the logic circuit control the reversible e

electric motor 34, which with the help of the'screw couple 31 and 32,

advances the bottom of the receiving tray along the guides 25. The fish,.

thus, under effect of its own weight falls down and departs from any .

further process of positioning.

The working organ of the actuating device designed for the / p.117

positioning of fish is a tube 9 With rectangular or elliptical profile.

with dimensions allowing the arrangement of 'the largest fish that may be

proCessed by the given technological device. The tube.may turn in two

mutually perpendicular planes, thus turning the fish, in the direction

required for the operation in the subsequent device.

TUrning of the fish with its head pointing into the given direction

, is done by electric motor. 37 by means of a pair of gears 38; the setting

of the turn to 1800 per cycle is carried out by the mobile rod 42 of the

electro-magnet 40 . falling into the aperture 39 of the second gear wheel in

- the pair 38.

. Turning of the fish with itg belly in the required direction is

carried out by electric - motor 14 by means of gear couple 17. The setting

of the turn of the tube to 180° aroUnd the longitudinal axis is done by .

means of a mobile . rod 16, and an electro-magnet 13; two apertures in the

'gear wheel are arranged.at apposite ends of the wheel diameter.

24.

The tube has two gates: the input gate 20 and .the output

gate 3. The input gate opens when a signal enters from the logic circuit,

• which indicates that thé size of the subsequent fish does not go beyond

. the limits of the dimensional range. The output gate opens by means of

electro-magnet and a lever system 4,.and releases the . fish that is

positioned in the required .way.

The productivity of the actuating mechanism ib 40 to 50 fish

per minute.

BI,BLIOGRA.PHY

1. Ageykin, KuznetsOva, N.N. "Datchiki kontrolya i regulirovaniya." /Control and . regulation sensors/, Moscow, published by "Mashinostroyeniye /Machine Construction!, 1965.

2. Bondarev, P.S. "Datchiki i pribory avtomaticheskogo kontrolya dlya transportirovochnykh ustroystv." /SenSors and apparatuses for automatic Control in transportation devices/, Moscow, Gosenergoizdat, 1961.

25.

3. /Automatic

Vershinin, N.N., Yakovlev, Y.M. "Avtomaticheskiy kontrol" control/, Moscow, published by "Energiya" /Energy/, 1964.

4. lineynykh' systems!,

.Vorontsov, L.N. "Fotoelektricheskiye sistemy kontrolya velichin." /Photoelectric àystems of controlling linear: Moscow, liubliShed by "Machinostroyeniye," 1965.

5. Grinshteyn, M.M. "Fotosoprotivleniye v priborakh promyshlennoy avtomàtiki." /Photoresistance in the instruments for industrial automation Moscow, Çosenergoizdat, 1962.

6. Mayzel, L.M. "Avtomaticheskiy kontrol razmerov isdeliy." /Automatic control of the dimensions of details/,.Moscow, Gosenergoizdat,

' 1961.

7. Tretyakov, M.N. "Elektronnyye rele i ikh primeneniye." /Electronic relays and their use!, Moscow, Gosenergoizdat, 1963.