DE909515C - Device for measuring the degree of filling of fishing nets - Google Patents
Device for measuring the degree of filling of fishing netsInfo
- Publication number
- DE909515C DE909515C DEA16088A DEA0016088A DE909515C DE 909515 C DE909515 C DE 909515C DE A16088 A DEA16088 A DE A16088A DE A0016088 A DEA0016088 A DE A0016088A DE 909515 C DE909515 C DE 909515C
- Authority
- DE
- Germany
- Prior art keywords
- filling
- degree
- measuring
- fishing nets
- board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 241001233242 Lontra Species 0.000 claims description 9
- 238000005259 measurement Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
- A01K73/10—Determining the quantity of the catch, e.g. by the pull or drag on the lines
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
Description
AUSGEGEBEN AM 22. APRIL 1954ISSUED APRIL 22, 1954
A 16088 III A 16088 III 11 45h45h
Dr. Willy Kunze, BremenDr. Willy Kunze, Bremen
ist als Erfinder genannt wordenhas been named as the inventor
Zur Messung des Füllgrades von Fischnetzen sind die verschiedenartigsten Vorrichtungen bekannt. Meistens wird der vom Netz ausgeübte Zug als Maß für den Füllgrad benutzt. Der vorliegenden Erfindung liegt die Erkenntnis zugrunde, daß der Abstand der Scherbretter sich in Abhängigkeit von dem Füllgrad des Netzes ändert und insbesondere gegen Ende des Füllvorganges einer raschen Verkleinerung unterworfen ist. Erfindungsgemäß wird dieser Vorgang zur Messung des Füllgrades ausgenutzt, indem man den Abstand der Scherbretter voneinander bestimmt und in geeigneter Weise auf ein Füllgradanzeigegerät an Bord des Schiffes überträgt.A wide variety of devices are known for measuring the degree of filling of fishing nets. Usually the tension exerted by the network is used as a measure of the degree of filling. The present The invention is based on the knowledge that the distance between the otter boards is dependent of the degree of filling of the network changes and in particular a rapid one towards the end of the filling process Is subject to downsizing. According to the invention, this process is used to measure the degree of filling exploited by determining the spacing of the otter boards from one another and in a suitable manner Way to a level indicator on board the ship.
Die Messung des Scherbrettabstandes kann auf mechanischem Wege durch einen Federzug erfolgen, indem man z. B. einen Stahldraht von einer Federrolle abrollen läßt, die hinter einem Scherbrett angeordnet ist, während das andere Ende des Drahtes am anderen Scherbrett befestigt ist. Durch den Federzug wird ein Regelvorgang betätigt, der die eingestellte Länge des von der Federrolle abgelaufenen Stahldrahtes am Bordgerät zur Anzeige bringt. Für die Übertragung der Messung von denThe measurement of the escherboard distance can be done mechanically by means of a spring balancer, by z. B. can roll a steel wire from a spring roll behind an otter board is arranged, while the other end of the wire is attached to the other otter board. By the spring balancer is actuated a control process, which the set length of the expired by the spring roller Steel wire on the on-board device to display. For the transfer of the measurement from the
Scherbrettern zum Bordgerät können z. B. akustische Signale verwendet werden. Diese Art der Anzeige ist im allgemeinen vorteilhafter als die unmittelbare elektrische Übertragung durch ein Kabel. Durch den Federzug kann zur akustischen Übertragung beispielsweise ein Signalsender an einem der Scherbretter so beeinflußt werden, daß sich mit der Länge des Federzuges die Frequenz oder Häufigkeit der vom Sender ausgesandten Signale ändert, die dann als Maß für den Füllgrad des Fischnetzes benutzt wird und durch Messung des Impulsabstandes oder der Impulsfrequenz zur Anzeige gebracht oder abgehört wird.Otter boards to the on-board device can, for. B. acoustic signals are used. This type of display is generally more beneficial than that direct electrical transmission through a cable. The spring balancer can be used for acoustic Transmission, for example, a signal transmitter on one of the otter boards can be influenced in such a way that The frequency or frequency of the transmitted by the transmitter with the length of the spring balancer Signals changes, which is then used as a measure of the degree of filling of the fishing net and by measurement the pulse spacing or the pulse frequency is displayed or monitored.
Gegebenenfalls können auch noch andere Kriterien zur Bestimmung des Füllgrades herangezogen werden, so daß der Scherbrettabstand zur Gesamtmessung nur mehr oder weniger beiträgt.If necessary, other criteria can also be used to determine the degree of filling so that the otter board distance only contributes more or less to the overall measurement.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA16088A DE909515C (en) | 1952-06-28 | 1952-06-28 | Device for measuring the degree of filling of fishing nets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA16088A DE909515C (en) | 1952-06-28 | 1952-06-28 | Device for measuring the degree of filling of fishing nets |
Publications (1)
Publication Number | Publication Date |
---|---|
DE909515C true DE909515C (en) | 1954-04-22 |
Family
ID=6923564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA16088A Expired DE909515C (en) | 1952-06-28 | 1952-06-28 | Device for measuring the degree of filling of fishing nets |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE909515C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1127139B (en) * | 1960-05-20 | 1962-04-05 | Atlas Werke Ag | Process and device for the correct adjustment of the length of the rope lines to the otter boards in fishing trawls |
-
1952
- 1952-06-28 DE DEA16088A patent/DE909515C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1127139B (en) * | 1960-05-20 | 1962-04-05 | Atlas Werke Ag | Process and device for the correct adjustment of the length of the rope lines to the otter boards in fishing trawls |
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