The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2010
Filed:
Oct. 02, 2006
Mitsuhiro Inouchi, Nishinomiya, JP;
Toshiyuki Shimizu, Nishinomiya, JP;
Masahiko Mushiake, Nishinomiya, JP;
Masaki Ogata, Nishinomiya, JP;
Yoshito Okubo, Nishinomiya, JP;
Mitsuhiro Inouchi, Nishinomiya, JP;
Toshiyuki Shimizu, Nishinomiya, JP;
Masahiko Mushiake, Nishinomiya, JP;
Masaki Ogata, Nishinomiya, JP;
Yoshito Okubo, Nishinomiya, JP;
Furuno Electric Company Limited, Nishinomiya-shi, JP;
Abstract
A fishfinder is provided for identifying with high precision a single fish under the ship and for measuring the length of the fish precisely. An operator of the fishfinder is assisted to grasp the depth and the length of the fish. A fishfinder transmits an ultrasound pulse having a high carrier frequency and an ultrasound pulse having a low carrier frequency by means of a pulse transmission and reception device at predetermined time intervals. A single fish echo is determined and tracked for a plurality of transmission intervals of ultrasound pulses emitted into the water. A target strength of single fish is measured based on the signal strength of a low carrier frequency echo signal from the single fish. The length of the fish is measured based on the target strength. A fish mark is displayed on the screen of an indicator, with the size of the fish mark depending on the fish length.