Abstract: The invention relates to an improved Inertial Navigation System (INS), which comprises: (a) an INS unit which comprises (a.1) an IMU which in turn comprises a set of at least three gyros and at least three accelerometers, all mounted on a rotatable stage; and (a.2) an INS algorithm for measuring the behavior of said gyros and said accelerometers during a mission, and calculating a navigation solution based on said measurements; and (b) a north finding determination unit, which comprises: (b.1) one or more from said IMU gyros and one or more from said IMU accelerometers; and (b.2) a north finding algorithm which utilizes measurements from said one or more north finding gyros and one or more north finding accelerometers during an initial conditions stationary state in which the stage is positioned in at least two separate stationary orientations, said north finding algorithm determines a north finding solution which is provided to the INS unit for initializing its said INS algorithm.

Abstract: An electrode constituted of: a fixture arranged for connection to a frame; and a probe exhibiting a closed face and a generally conically shaped protrusion extending longitudinally from the closed face towards an apex, the probe in communication with the fixture, wherein the fixture is arranged to allow the probe to travel in a generally unrestricted manner exclusively along a longitudinal axis of the probe, wherein the generally conically shaped protrusion is arranged such that when the closed face is in contact with a skin surface, the generally conically shaped protrusion penetrates an outer layer of the skin surface responsive to the weight of the probe and is in electrical contact with an inner portion of the penetrated skin surface, and wherein a portion of the closed face, surrounding the generally conically shaped protrusion, is arranged to be in electrical contact with the outer skin layer.

Abstract: The invention relates to an improved Inertial Navigation System (INS), which comprises: (a) an INS unit which comprises (a.1) an IMU which in turn comprises a set of at least three gyros and at least three accelerometers, all mounted on a rotatable stage; and (a.2) an INS algorithm for measuring the behavior of said gyros and said accelerometers during a mission, and calculating a navigation solution based on said measurements; and (b) a north finding determination unit, which comprises: (b.1) one or more from said IMU gyros and one or more from said IMU accelerometers; and (b.2) a north finding algorithm which utilizes measurements from said one or more north finding gyros and one or more north finding accelerometers during an initial conditions stationary state in which the stage is positioned in at least two separate stationary orientations, said north finding algorithm determines a north finding solution which is provided to the INS unit for initializing its said INS algorithm.

Abstract: An attitude determination system provided with North-finding capability, comprises: a) a stage consisting of a rotating platform provided with a high precision positioning controller; b) an Inertial Navigation System (INS) comprising inertial sensors, wherein said inertial sensors comprise gyroscopes and accelerometers, and wherein at least one gyroscope is of a precision suitable to find the direction of true North; and, c) a control unit for controlling input signals and output signals of the stage and the INS and combining the signals in order to provide attitude data of the system.

Abstract: An electrode constituted of: a fixture arranged for connection to a frame; and a probe exhibiting a closed face and a generally conically shaped protrusion extending longitudinally from the closed face towards an apex, the probe in communication with the fixture, wherein the fixture is arranged to allow the probe to travel in a generally unrestricted manner exclusively along a longitudinal axis of the probe, wherein the generally conically shaped protrusion is arranged such that when the closed face is in contact with a skin surface, the generally conically shaped protrusion penetrates an outer layer of the skin surface responsive to the weight of the probe and is in electrical contact with an inner portion of the penetrated skin surface, and wherein a portion of the closed face, surrounding the generally conically shaped protrusion, is arranged to be in electrical contact with the outer skin layer.

Abstract: An attitude determination system provided with North-finding capability, comprises: a) a stage consisting of a rotating platform provided with a high precision positioning controller; b) an Inertial Navigation System (INS) comprising inertial sensors, wherein said inertial sensors comprise gyroscopes and accelerometers, and wherein at least one gyroscope is of a precision suitable to find the direction of true North; and, c) a control unit for controlling input signals and output signals of the stage and the INS and combining the signals in order to provide attitude data of the system.

Abstract: An apparatus and method for locating therapeutically active points and applying transcutaneous electrical stimulation thereto are disclosed. The apparatus includes patient applied therapeutic module, consisting of a fixture and a plurality of probes, and an actuating controlling module. The method including the steps of measuring local electrical impedances of a given skin surface area, identifying the points characterized by lower impedances, selecting the desired point/s and applying transcutaneous electrical stimulation thereto.

Abstract: An apparatus and method for locating therapeutically active points and applying transcutaneous electrical stimulation thereto are disclosed. The apparatus includes patient applied therapeutic module, consisting of a fixture and a plurality of probes, and an actuating controlling module. The method including the steps of measuring local electrical impedances of a given skin surface area, identifying the points characterized by lower impedances, selecting the desired point/s and applying transcutaneous electrical stimulation thereto.

Abstract: A non-gyroscopic inertial seeker system for determining the azimuth of a body relative to the true North. The system includes a fluid rotor angular accelerometer which provides a periodic output signal, and means to extract the body azimuthal direction relative to the true North from the periodic output.

Abstract: A method of determining an orientation of a body. The method includes the steps of measuring an acceleration of the body in a first direction, measuring an acceleration of the body in a second direction different from the first direction, the first direction and the second direction defining a plane. Measuring an acceleration perpendicular to the plane in a coordinate system rotating about an axis perpendicular to the plane, and inferring the orientation of the body from the three measurements.