Patents Assigned to Jungner Instrument AB
  • Patent number: 4068207
    Abstract: Apparatus for measuring a vessel's velocity relative to a reference location includes a transmitter on board the vessel for transmitting a coherent signal toward a reference location from where the coherent signal is reflected, and a receiver on board the vessel which includes at least four spaced-apart receiver transducers. The coherent signal transmitted by the transmitter is within a lobe range that is substantially common to the receiver transducers, the signals reflected by the reference location comprising at least two acoustic signals that are similar in character but different in timing from each other, the difference in timing being a function of the distance in the direction of measurement between the spaced-apart receiver transducers and further being a function of the vessel's velocity, the received signals comprising reflections from every point on the reference location within the lobe range.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: January 10, 1978
    Assignee: Jungner Instrument AB
    Inventors: Ingvar Andermo, Karl-Gustav Masreliez
  • Patent number: 4041293
    Abstract: Method and apparatus for measuring the velocity of an object relative to a reference by means of signals that are transmitted and received by transmitters and receivers fixed to the object at a certain geometric distance from each other in the direction of measurement, signals being transmitted by the object and being reflected by the reference. The receivers set up signals which correspond to the auto-correlation and cross-correlation of the received signals, the correlation signals being functions of the transmitter-receiver system geometry and being substantially independent of the reflection properties of the reference. The auto-correlation and cross-correlation signals are operated on to determine a time shift therebetween which is a function of the displacement of the object over a given period of time, the velocity of the object relative to the reference location being determined from said time shift.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: August 9, 1977
    Assignee: Jungner Instrument AB
    Inventor: Gunnar Axel Kihlberg
  • Patent number: 3991398
    Abstract: Apparatus for measuring a vessel's velocity relative to a reference location includes a transmitter on board the vessel for transmitting a coherent signal toward a reference location from where the coherent signal is reflected, and a receiver on board the vessel which includes at least two spaced-apart receiver transducers. The coherent signal transmitted by the transmitter is within a lobe range that is substantially common to the at least two receiver transducers, the signals reflected by the reference location comprising at least two acoustic signals that are similar in character but different in timing from each other, the difference in timing being a function of the distance in the direction of measurement between the spaced-apart receiver transducers and further being a function of the vessel's velocity, the received signals comprising reflections from every point on the reference location within the lobe range.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: November 9, 1976
    Assignee: Jungner Instrument AB
    Inventors: Nils Ingvar Andermo, Karl-Gustav Masreliez