Inertial stabilizing system
First Claim
1. Inertial stabilizing system for an instrument including a casing and a pivotally carried body in relation to the casing of the instrument, comprisingan oscillogyro as a stability reference which is associated with the casing in such a way that the longitudinal axis of a shaft of the oscillogyro follows substantially the movements of the casing;
- detecting means for detecting the angular position of the rotational plane (RP) of the oscillogyro;
a control system for affecting the angular position of the pivotally carried body in accordance with the rotational plane (RP) detected, a rotor of the oscillogyro being located within a case;
a viscous coupling between the rotor and the shaft;
said coupling enabling intentional angular change of the rotor-reference plane (RP) by intentional angular moving of the casing and thus, via said control system, an angular change of the pivotally carried body.
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Abstract
The present invention comprises an inertial stabilizing system to be used preferably in connection with image stabilizing of hand-held optical instruments. An ultralight oscillogyro (1-6) serves as a reference element by which the angular position in inertial space is detected. An electromechanical control system causes a gimbaled part (19) of the optics to assume essentially the same angular position in space assumed by the rotation plane of the rotor of the oscillogyro. The oscillogyro is modified for a widened angular range and the damping of the gyro is utilized for obtaining directly the possibility of target tracking.
41 Citations
12 Claims
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1. Inertial stabilizing system for an instrument including a casing and a pivotally carried body in relation to the casing of the instrument, comprising
an oscillogyro as a stability reference which is associated with the casing in such a way that the longitudinal axis of a shaft of the oscillogyro follows substantially the movements of the casing; -
detecting means for detecting the angular position of the rotational plane (RP) of the oscillogyro; a control system for affecting the angular position of the pivotally carried body in accordance with the rotational plane (RP) detected, a rotor of the oscillogyro being located within a case; a viscous coupling between the rotor and the shaft; said coupling enabling intentional angular change of the rotor-reference plane (RP) by intentional angular moving of the casing and thus, via said control system, an angular change of the pivotally carried body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Inertial stabilizing system for an instrument including a casing and a pivotally carried body in relation to the casing of the instrument, comprising:
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an oscillogyro as a stability reference which is associated with the casing in such a way that the longitudinal axis of the driver of the oscillogyro follows essentially the movements of the casing; detecting means for detecting the angular position of the rotational plane (RP) of the oscillogyro; a control system for affecting the angular position of the pivotally carried body in accordance with the rotational plane (RP) detected; a rotor of the oscillogyro located within said casing, a coupling between the rotor and the driver introducing a moment between the rotor and the driver about a single axis bearing of the oscillogyro, said moment being substantially proportional to the relative angular speed of the rotor and the driver about said single axis bearing of the oscillogyro, said coupling enabling intentional angular change of the rotor-reference plane (RP) and thus, via said control system, an angular change of the pivotally carried body; and an element is adapted, when the driver is at rest, to engage resiliently the rotor and thereby lock the rotor in a centered position and that, after start of the oscillogyro, said element frees the rotor at a predetermined rpm by action of centrifugal force.
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12. Inertial stabilizing system for an instrument including a casing and a pivotally carried body mounted in relation to the casing of the instrument, comprising:
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an oscillogyro as a stability reference which is associated with the casing in such a way that the longitudinal axis of the driver of the oscillogyro follows essentially the movements of the casing; detecting means for detecting the angular position of the rotational plane (RP) of the oscillogyro; a control system for affecting the angular position of the pivotally carried body in accordance with the rotational plane (RP) detected; said oscillogyro having a rotor located within said casing;
the detection means including at least one light diode and a zero detector, the light diode emitting short light pulses which are reflected by at least one reflecting surface on the rotor to then strike the detector;the output signal of the detector is connected to a sample and hold circuit whose output signal is frequency filtered and supplied to an actuator which is adapted to affect the angular position of the pivotally carried body.
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Specification