Abstract: In an embodiment, an acoustic projector includes an acoustic transmit transducer capable of producing a sound pressure radiation in response to a driver signal received from a transmit source, an acoustic receive transducer capable of producing a source level signal in response to receiving at least a portion of the sound pressure radiation, and a controller configured to monitor the source level signal and report the source level signal monitored.

Abstract: In an embodiment, an acoustic projector includes an acoustic transmit transducer capable of producing a sound pressure radiation in response to a driver signal received from a transmit source, an acoustic receive transducer capable of producing a source level signal in response to receiving at least a portion of the sound pressure radiation, and a controller configured to monitor the source level signal and report the source level signal monitored.

Abstract: Embodiments relate to a speed sensor and a speed sensing method for measuring relative speeds of receivers with respect to particles in a fluid by detecting individual particles. A receiver generates a plurality of signals related to reflections from particles in a region being monitored. A sampling circuit samples the signals, and a processing device processes the signals according to a particle detection scheme to determine speed. Concomitant use of the same receivers allows depth measurement.

Abstract: Embodiments relate to a speed sensor and a speed sensing method for measuring relative speeds of receivers with respect to particles in a fluid by detecting individual particles. A receiver generates a plurality of signals related to reflections from particles in a region being monitored. A sampling circuit samples the signals, and a processing device processes the signals according to a particle detection scheme to determine speed. Concomitant use of the same receivers allows depth measurement.

Abstract: In an embodiment, an acoustic projector includes an acoustic transmit transducer capable of producing a sound pressure radiation in response to a driver signal received from a transmit source, an acoustic receive transducer capable of producing a source level signal in response to receiving at least a portion of the sound pressure radiation, and a controller configured to monitor the source level signal and report the source level signal monitored.

Abstract: Embodiments relate to a speed sensor and a speed sensing method for measuring relative speeds of receivers with respect to particles in a fluid by detecting individual particles. A receiver generates a plurality of signals related to reflections from particles in a region being monitored. A sampling circuit samples the signals, and a processing device processes the signals according to a particle detection scheme to determine speed. Concomitant use of the same receivers allows depth measurement.

Abstract: Embodiments relate to a speed sensor and a speed sensing method for measuring relative speeds of receivers with respect to particles in a fluid by detecting individual particles. A receiver generates a plurality of signals related to reflections from particles in a region being monitored. A sampling circuit samples the signals, and a processing device processes the signals according to a particle detection scheme to determine speed. Concomitant use of the same receivers allows depth measurement.

Abstract: Embodiments relate to monitoring the temperature of a transducer and controlling the temperature as a function of adjusting one or more characteristics of the transducer.

Abstract: An example embodiment of the present invention relates to a method and corresponding apparatus that terminates circuit connectivity in a bus by determining location of an instrument on the bus, and based on coupling a terminating resistance to the instrument. The example embodiment may couple a terminating resistance with the instrument placed at the end of a bus by employing at least one male-to-male connector arranged to establish a connection between the female receptacles of the terminating resistance and the bus. In order to determine a state of termination of circuit connectivity in a bus, an example embodiment of the present invention may connect a transceiver to a terminating resistance and determine a state of termination of circuit connectivity in the bus as a function of sensing receive activity in the transceiver.

Abstract: In one embodiment a method and corresponding apparatus are arranged to determine an accurate device heading by continuously combining an average magnetic heading with the compensated inertial heading. The example embodiment obtains the compensated inertial heading by compensating for a time delay of an inertial heading.

Abstract: Embodiments relate to monitoring the temperature of a transducer and controlling the temperature as a function of adjusting one or more characteristics of the transducer.

Abstract: An example embodiment of the present invention relates to a method and corresponding apparatus that terminates circuit connectivity in a bus by determining location of an instrument on the bus, and based on coupling a terminating resistance to the instrument. The example embodiment may couple a terminating resistance with the instrument placed at the end of a bus by employing at least one male-to-male connector arranged to establish a connection between the female receptacles of the terminating resistance and the bus. In order to determine a state of termination of circuit connectivity in a bus, an example embodiment of the present invention may connect a transceiver to a terminating resistance and determine a state of termination of circuit connectivity in the bus as a function of sensing receive activity in the transceiver.

Abstract: In one embodiment a method and corresponding apparatus are arranged to determine an accurate device heading by continuously combining an average magnetic heading with the compensated inertial heading. The example embodiment obtains the compensated inertial heading by compensating for a time delay of an inertial heading.

Abstract: A transducer identification system provides transducer characteristic information to an echosounder. The echosounder, in turn, utilizes the transducer characteristic information to alter its functionality or parameters to optimize its performance.

Abstract: A speed sensor for a marine vessel includes a correction circuit to correct any sensor non-linearities so that the sensor produces an output with a pulse stream having a constant pulse rate, and reduces the pulse-to-pulse variations of the pulse stream. The circuit can standardize the pulse stream to have a frequency corresponding to a standard rate.

Abstract: A speed sensor for a marine vessel includes a correction circuit to correct any sensor non-linearities so that the sensor produces an output with a pulse stream having a constant pulse rate, and reduces the pulse-to-pulse variations of the pulse stream. The circuit can standardize the pulse stream to have a frequency corresponding to a standard rate.