초록 ▼

Images of underwater features, animate and inanimate, are produced from substantial distances in any direction around a boat, using small and easily mountable sonar devices, including three sonar transducers, two being stationary and the third being directable, the transducers being operable at vari

Images of underwater features, animate and inanimate, are produced from substantial distances in any direction around a boat, using small and easily mountable sonar devices, including three sonar transducers, two being stationary and the third being directable, the transducers being operable at various ultrasonic frequencies. Under keyboard control and using completely integrated electronic circuitry, images and echo sounding reports are generated on a graphic video display. The images include a sector-shaped image from a sector scan which covers a selected range of azimuth angles at a selected down angle.

대표청구항 ▼

A sonar system for installation on a fishing boat or other vessel, comprising: scanning transducer means arranged for mounting at a certain location on said vessel for underwater transmission of bursts of ultrasonic energy from said location and for developing echo signals in response to reflections

A sonar system for installation on a fishing boat or other vessel, comprising: scanning transducer means arranged for mounting at a certain location on said vessel for underwater transmission of bursts of ultrasonic energy from said location and for developing echo signals in response to reflections of ultrasonic energy from fish or other underwater targets, scanning transducer control means for controlling said scanning transducer means to effect transmission and reception of energy along narrow beams each having a central axis at a down angle measured from a horizontal reference plane through said location and at an azimuth angle measured from a vertical reference plane through said location, an operator\s control panel arranged for manual operation to develop command signals including signals which define a selected underwater region to be scanned, said scanning transducer control means being controlled from said command signals for controlling said down and azimuth angles of said beams for transmission and reception to said selected underwater region to effect scanning thereof, visual display means, and imaging means coupled to said scanning transducer means, to said transducer control means, to said control panel and to said display means and arranged to develop a visual image of said selected underwater region in a display area of said display means, said visual image including indications at locations within said display area corresponding to the locations of reflecting targets within said selected underwater region, said imaging means being arranged to control said display to indicate the horizontal distance from said location to reflecting targets indicated on said display.