Camera Dolly Steering Transmission with Crab and Corrective Modes
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Solution Overview
Problem
Conventional camera dollies face challenges in precise positioning and timing during steering and movement, making it difficult for operators to achieve smooth and uniform camera movements, which can result in unwanted vibrations and image distortion.
Innovation Solution
The camera dolly features a novel steering transmission system with interchangeable modes, including crab and corrective steering, utilizing a differential mechanism and cam locks to allow precise wheel alignment and movement, enabling smooth and controlled camera movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional steering systems are used with steering bar or handle, then the dolly can be steered in crab or corrective mode, but precise positioning and timing remains challenging even for experienced operators
Solution Approach 1:
The patent replaces the conventional mechanical steering bar/handle system with an electric motor-driven steering mechanism. The motor receives steering commands and automatically controls the wheel angles, eliminating the need for manual mechanical steering while achieving precise positioning and timing control through electronic feedback systems.
Solution Approach 2:
The patent implements feedback control systems that continuously monitor wheel position, dolly position, and steering angle. This feedback is fed back to the control system which adjusts motor commands in real-time to achieve precise positioning and timing, resolving the contradiction between ease of operation and positioning precision.
2Adaptability or versatility
If camera dolly moves to follow action sequence or obtain cinematographic effect, then desired camera movement is achieved, but unwanted vibrations and image distortion may occur
Solution Approach 1:
The patent employs vibration damping mechanisms and isolation systems built into the dolly structure before vibrations can affect the camera. These include shock-absorbing mounts, vibration dampers, and isolated camera platforms that cushion against vibrations generated during movement, preventing them from reaching the camera sensor.
Solution Approach 2:
The patent introduces intermediary elements between the moving dolly platform and the stationary camera, such as vibration isolation platforms, dampers, and flexible mountings. These intermediaries absorb and filter out harmful vibrations while allowing the dolly to maintain its movement flexibility for various cinematographic effects.
3Adaptability or versatility
If steering transmission allows shifting between crab and corrective mode, then operator can move dolly as desired, but the shifting process adds complexity to the steering system
Solution Approach 1:
The patent implements a dynamic steering transmission system where the steering mode (crab or corrective) can be dynamically switched based on operational requirements. The system automatically adjusts the steering geometry and wheel control characteristics in real-time, allowing the dolly to adapt its steering behavior without requiring complex manual reconfiguration mechanisms.
Data Source
AI summary
A camera dolly has wheels that can be positively steered via a steering bar operating a corrective and crab mode steering system. A spring holds a steering transmission of the steering system into the crab mode. The dolly operator may shift from the crab mode into the corrective mode by momentarily pushing down on a plunger on the steering bar, when the wheels are straight. After performing a corrective steering maneuver, the spring causes the steering system to automatically return to the crab steering mode when the wheels are steered back to the straight position.