Triaxial gyroscopic stabilizer for movie or television camera

• US 5,868,031 A
• Filed: 08/06/1997
• Issued: 02/09/1999
• Est. Priority Date: 02/07/1995
• Status: Expired due to Fees

• Current Assignee: Anatoliy Kokush
• Original Assignee: Anatoliy Kokush
• Inventors: Kozlov, Vladimir Vladimirovich, Kokush, Anatoly Akimovich, Fateev, Vladimir Vasilievich, Evstratov, Lev Nikolaevich
• Primary Examiner(s): Bonck, Rodney H.
• Assistant Examiner(s): Charles, Marcus
• Application Number:
  US08/875,909
• Time in Patent Office: 552 Days
• Field of Search: 74/5.22, 74/5 F, 74/5.2, 74/5.46, 74/490.1, 74/5.6 D, 74/5.6 E, 74/5.6 F, 74/5.34, 74/5.42, 74/5.6 C, 74/5.4
• US Class Current: 74/5.34
• CPC Class Codes: G01C 21/18 Stabilised platforms, e.g. by gyroscope
• CPC Class Codes: G02B 27/644 compensating for large deviations, e.g. maintaining a fixed line of sight while a vehicle on which the system is mounted changes course
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position
• CPC Class Codes: Y10T 74/1218 Combined
• CPC Class Codes: Y10T 74/1221 Multiple gyroscopes
• CPC Class Codes: Y10T 74/1236 by plural diverse forces
• CPC Class Codes: Y10T 74/125 by magnetic field

Abstract

A triaxial gyroscopic stabilizer for a movie or television camera has a camera in a cardan suspension unit, two three-stage gyroscopes, controlled linkages for adjusting course, banking and pitch, booster-converters, a set of accelerometers, a pitch angle sensor, an integrator, a system shut-off unit, a memory unit, low frequency filters, two computing units, a summator and course and pitch control levers. The cardan suspension unit has an external frame, a middle frame and a platform; the outer frame has the form of a half-fork bracket with an axis of rotation aligned along the course axis; the middle frame has the form of a fork bracket with an axis of rotation aligned along the course axis; the middle frame has the form of a fork bracket with an axis of rotation aligned along the axis of pitch. The first of the two three-stage gyroscopes is mounted on the platform, while the second is mounted on the middle frame.

Claims

1. A triaxial gyrostabilizer of a movie and television camera comprising a movie and television camera (1) in a cardan suspension composed of an exterior frame (6) a medium frame (4) a platform (2) with their axes of rotation, two three-degree gyroscopes (11) (17) with the sensors of angle (12) (14) (18) (20) and moment (16) (34) (27) (37) in accordance with the axes of sensitivity, one of each is mounted on the platform (2) so that one of its axes of sensitivities parallel to the axis of rotation (3) of the platform (2), while a system of interframe correction is introduced in accordance with a second axis, drives of course (10), banking (9) and pitch (8) boosters-converters (13) (19) (21), a block of three accelerometers (22) (23) (24) with orthogonal axes of sensitivity, while the axes of sensitivity of the first accelerometer (22) is parallel to the axis of rotation (3) of the platform (2), the axis of sensitivity of the second accelerometer (23) is perpendicular to the playing of the platform (2), and the axis of sensitivity (24) of the third accelerometer is perpendicular to the axis of pitch, handles of control of the course (36) and pitch (33), a sensor of angle of the pitch (25) of the platform (2), a low frequency filter (30), wherein the sensors of the angles of the pitch (25) of the first gyroscope (11) and the sensors of angles of course (20) and banking (18) of the second gyroscope (17) are connected through boosters-convertors (13) (19) (21) correspondingly to the drives of pitch (8), course (10) and banking (9), an exit of the first accelerometer (22) is connected through a low frequency filter (26) to a sensor of moment (27) of control of the banking of the second gyroscope (17), and a handle of control of the pitch (33) is connected to a sensor of moment (34) of control of the pitch of the first gyroscope (11), characterized in that there are introduced an integrator (35), a summator (39), a first and a second commuting block (31) (38), a memory block (32), a second low frequency filter (30) and a mode shut-off (40), an axis of rotation (3) of a platform (2) is directed to the pitch, the medium frame (4) is formed as a fork and its axis of rotation (5) is directed in accordance with the banking, the exterior frame (6) is formed as a semi-fork and its axis of rotation (7) is directed in accordance with the course, while the handle of control of the pitch (33) is connected to the input of the integrator (35), the mode shut-off (40) is connected to the memory block (32) and the integrator (35), the outputs of the second (23) and the third (24) accelerometers are connected through the second low frequency filter (30) to the first computing block (31), the output of which is connected with the memory block (32), the output of the memory block (32), integrator (35) and sensor of angle of pitch (25) of the platform (2) are connected to the input of the summator (39) whose output and the output of the handle of control of the course (36) are connected to the input of the second computing block (38), and its outputs are connected to the sensors of moment of control of the course (37) and banking (27) of the second gyroscope.