JPS55164591A - Speed control device for trawlboat at net casting - Google Patents

Speed control device for trawlboat at net casting

Info

Publication number
JPS55164591A
JPS55164591A JP7167779A JP7167779A JPS55164591A JP S55164591 A JPS55164591 A JP S55164591A JP 7167779 A JP7167779 A JP 7167779A JP 7167779 A JP7167779 A JP 7167779A JP S55164591 A JPS55164591 A JP S55164591A
Authority
JP
Japan
Prior art keywords
speed
boat
signal
inputted
comparison circuit
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.)
Pending
Application number
JP7167779A
Other languages
Japanese (ja)
Inventor
Yasuaki Iwanami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fukushima Ltd
Original Assignee
Fukushima Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fukushima Ltd filed Critical Fukushima Ltd
Priority to JP7167779A priority Critical patent/JPS55164591A/en
Publication of JPS55164591A publication Critical patent/JPS55164591A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To keep the letting out speed of fishing implements against water at a fixed level and thus facilitate the fishing work by a method wherein the speed of a boat is adjusted so that the deviation signal obtained by comparing a signal of the speed for letting out a rope with a signal of the speed of the boat becomes equal to the signal set beforehand by a speed setting apparatus for the fishing implements against water.
CONSTITUTION: When a trawl net 17 is cast into the water and a boat continues to proceed, a rope 16 is pulled by the stream resistance of fishing implements and rotates a winch drum 12. Then, a rope-casting speed signal from a pulse signal generator 22 provided on the shaft of the winch drum 12 is inputted in one terminal of the comparison circuit 24' of a boat-speed control device 24, while a boat speed signal from a boat speed detector 26 is inputted in the other terminal of the comparison circuit 24', thus the difference in both speeds being outputted as a deviation signal. The deviation signal thus obtained is inputted in one end of a comparison circuit 24", while a set signal set beforehand given by a speed setting apparatus 25 for the trawl net 17 against water being inputted in the other terminal of the comparison circuit 24", and both signals are compared. The difference obtained through the comparison is outputted and the output is then inputted in a rotation control device 28 of the propelling engine of the boat, etc., thereby the speed of the boat is controlled.
COPYRIGHT: (C)1980,JPO&Japio
JP7167779A 1979-06-07 1979-06-07 Speed control device for trawlboat at net casting Pending JPS55164591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7167779A JPS55164591A (en) 1979-06-07 1979-06-07 Speed control device for trawlboat at net casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7167779A JPS55164591A (en) 1979-06-07 1979-06-07 Speed control device for trawlboat at net casting

Publications (1)

Publication Number Publication Date
JPS55164591A true JPS55164591A (en) 1980-12-22

Family

ID=13467438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7167779A Pending JPS55164591A (en) 1979-06-07 1979-06-07 Speed control device for trawlboat at net casting

Country Status (1)

Country Link
JP (1) JPS55164591A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110310A (en) * 1991-04-25 1992-05-05 Lakeland Engineering Corporation Automatic speed control system for boats

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110310A (en) * 1991-04-25 1992-05-05 Lakeland Engineering Corporation Automatic speed control system for boats

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