Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Fishfinder










Image Number 8 for United States Patent #7663974.

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.








 
 
  Recently Added Patents
Battery loading and unloading mechanism
Smooth silicon-containing films
Reaction medium for detecting and/or identifying bacteria of the Legionella genus
Fabric care compositions comprising front-end stability agents
Automated measurement of concentration and/or amount in a biological sample
Method and system for automatically hiding irrelevant parts of hierarchical structures in computer user interfaces
Personal warming apparatus
  Randomly Featured Patents
Process for the preparation of squaric acid by the electrolysis of carbon monoxide in anhydrous aliphatic nitrile solvent media
Apparatus for controlling alignment between precision ground plates and method of controlling a desired alignment between opposing precision ground plates
Reduction-based joint replacement apparatus and methods
Device for wearing around the neck of a user
Hepatitis C virus inhibitors
Submerged object detection and classification system
Photovoltaic device
Baseball swing development tool
Single-plate projection-type color liquid crystal display
Data processing system with synchronization coprocessor for multiple threads