Counter-balancing vibrations from a vehicle for stabilizing image capture
Embodiments are described for a stabilization system configured, in some embodiments, for stabilizing image capture from an aerial vehicle (e.g., a UAV). According to some embodiments, the stabilization systems employs both active and passive stabilization means. A passive stabilization assembly includes a counter-balanced suspension system that includes an elongated arm that extends into and is coupled to the body of a vehicle. The counter-balanced suspension system passively stabilizes a mounted device such as an image capture device to counter motion of the UAV while in use. In some embodiment the counter-balanced suspension system passively stabilizes a mounted image capture assembly that includes active stabilization means (e.g., a motorized gimbal and/or electronic image stabilization). In some embodiments, the active and passive stabilization means operate together to effectively stabilize a mounted image capture device to counter a wide range of motion characteristics.
1. An aerial vehicle comprising:
a housing;
an image capture assembly arranged proximate to a front end of the housing; and
an image stabilization assembly configured to isolate the image capture assembly from vibration of the housing using an elongated arm weighted to counterbalance a mass of components of the image capture assembly,
wherein the elongated arm extends into an interior space of the housing from the image capture assembly toward a back end of the housing.
2. The aerial vehicle of claim 1 , further comprising:
one or more passive vibration isolators,
wherein the elongated arm comprises a distal end and a proximal end, the distal end coupled to an interior surface of the housing via one or more passive vibration isolators and the proximal end coupled to the image capture assembly.
3. The aerial vehicle of claim 2 , wherein at least one of the one or more passive vibration isolators comprises an elastic vibration isolator.
4. The aerial vehicle of claim 2 , wherein at least one of the one or more passive vibration isolators has a 1:1:1 ratio of compression stiffness to tensile stiffness to shear stiffness.
5. The aerial vehicle of claim 2 , further comprising:
a mounting assembly,
wherein the proximal end of the elongated arm is coupled to the image capture assembly via the mounting assembly.
6. The aerial vehicle of claim 1 , wherein the image stabilization assembly is configured to isolate the image capture assembly from vibration of the housing when the vibration is above a threshold frequency.
7. The aerial vehicle of claim 6 , wherein the threshold frequency is 15 Hz.
8. The aerial vehicle of claim 1 , wherein the image stabilization assembly comprises:
an active stabilization assembly including a motorized gimbal, the active stabilization assembly configured to actively counter motion by the aerial vehicle to actively stabilize the image stabilization assembly; and
a passive stabilization assembly including the elongated arm, the passive stabilization configured to passively counter the motion by the aerial vehicle to passively stabilize the image stabilization assembly.
9. The aerial vehicle of claim 1 , wherein the elongated arm is made of one or more of plastic, metal, carbon fiber, synthetic fiber, or a composite material.
10. An image stabilization apparatus for isolating an image capture assembly from vibration of a housing, the apparatus comprising:
one or more passive vibration isolators; and
an elongated arm weighted to counterbalance a weight of the image capture assembly,
the elongated arm having a proximal end adapted to couple with the image capture assembly and a distal end coupled to the housing via the one or more passive vibration isolators,
wherein the image capture assembly includes an electronic imaging stabilization (EIS) system configured to receive and process images captured by the image capture device to actively counter a detected motion.
11. The image stabilization apparatus of claim 10 , wherein at least one of the one or more passive vibration isolators comprises an elastic vibration isolator.
12. The image stabilization apparatus of claim of 10 , wherein at least one of the one or more passive vibration isolators has a 1:1:1 ratio of compression stiffness to tensile stiffness to shear stiffness.
13. The image stabilization apparatus of claim of 10 , further comprising:
a mounting assembly,
wherein the proximal end of the elongated arm is coupled to the image capture assembly via the mounting assembly.
14. The image stabilization apparatus of claim of 10 , wherein the housing is coupled to an unmanned aerial vehicle (UAV).
15. The image stabilization apparatus of claim of 14 , wherein the housing has a front end and a back end, the image capture assembly is arranged proximate to the front end of the housing, and the elongated arm extends into an interior space of the housing from the image capture assembly towards the back end of the housing.
16. The image stabilization apparatus of claim of 10 , wherein the image stabilization assembly is configured to isolate the image capture assembly from vibration of the housing when the vibration is above a threshold frequency.
17. A system for isolating an image capture assembly from vibration of a housing, the system comprising:
one or more passive vibration isolators;
an apparatus coupled to the housing via the one or more passive vibration isolators;
a mounting assembly coupled to the apparatus and adapted to couple the apparatus with the image capture assembly;
wherein the apparatus is weighted to counterbalance a mass of the components of the image capture assembly, and
wherein the image capture assembly includes an electronic imaging stabilization (EIS) system configured to receive and process images captured by the image capture device to actively counter a detected motion.
18. The system of claim 17 , wherein the housing is coupled to an unmanned aerial vehicle (UAV), wherein the image capture assembly includes an image capture device configured to capture images of a surrounding physical environment while UAV is in flight.
19. The system of claim 17 , wherein at least one of the one or more passive vibration isolators has a 1:1:1 ratio of compression stiffness to tensile stiffness to shear stiffness.
20. The system of claim 17 , wherein the system is configured to isolate the image capture assembly from vibration of the housing that is above a threshold frequency.