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
Wireless communications apparatus and wireless communications method
Information obtaining and notification, data message forwarding and handover method and access node
Low latency interrupt collector
Method and structure for forming ETSOI capacitors, diodes, resistors and back gate contacts
Systems and methods for picture based communication
Emergency whistle, flashlight, and compass
Organic electroluminescent element
  Randomly Featured Patents
Ink jet head manufacturing method and ink jet head manufactured by the manufacturing method
Trace-gimbal assembly with extension that prevents contact between solder joints
Intake apparatus for V-type 8-cyl internal combustion engine
Electrode tip assembly with variable resistance to bending
Plant cells and plants expressing chimeric isoprenoid synthases
SiO2 wire bond insulation in semiconductor assemblies
Semiconductor module having discrete components and method for producing the same
Non-volatile memory architecture employing bipolar programmable resistance storage elements
Core form for lining containers
Beverage container