Photosensitive Module Servo Driver Rotation for Gimbal Weight Reduction
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Solution Overview
Problem
Traditional gimbal technologies require large and heavy motor systems to drive the lens and sensor assembly, leading to increased size, weight, and cost, as well as reduced rigidity and portability, making it difficult to achieve compact and efficient motion shooting devices, especially with long-lens configurations.
Innovation Solution
A photosensitive module with a servo driver that allows the photosensitive element to rotate relative to a mechanical supporting piece, reducing the weight and size of the servo driver and optimizing the gimbal structure, enabling a compact and lightweight design with improved rigidity and portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor drives the whole lens sensor assembly to achieve rotation, then the photosensitive element can rotate relative to the shell, but the servo driver becomes large and heavy
Solution Approach 1:
The patent segments the rotation function by allowing the photosensitive element to rotate independently relative to the lens assembly, rather than rotating the entire assembly. This is achieved by providing a photosensitive module where the photosensitive element can rotate relative to the mechanical supporting piece (lens assembly), driven by a compact servo driver positioned at the end of the gimbal mechanism. This segmentation reduces the mass that needs to be rotated, enabling a smaller, lighter servo driver.
2Force
If the axis of rotational degree of freedom passes through the center of gravity of the lens sensor assembly, then the load on the driving motor is reduced, but long mechanical construction is required increasing size and weight
Solution Approach 1:
The patent inverts the traditional gimbal configuration by positioning the photosensitive module at the end of the mechanical arm rather than having the mechanical arm support the lens assembly. The mechanical supporting piece (lens assembly) is positioned such that its center of gravity is far from the rotational axis, allowing the rotational degree of freedom axis to pass through or near the center of gravity of the photosensitive module instead. This inversion enables a compact mechanical construction with shorter mechanical arms while maintaining balanced rotation.
3Manufacturing precision
If the lens assembly is long to achieve specific imaging requirements, then the imaging performance is improved, but the gimbal structure becomes less rigid and more difficult to integrate
Solution Approach 1:
The patent segments the camera system into a separate photosensitive module that can rotate independently, decoupling the lens assembly from the rotation mechanism. This allows the lens assembly to be optimized for imaging performance (longer focal length) without compromising gimbal rigidity, as the photosensitive module handles the rotation function. The mechanical structure can be designed with optimal rigidity while the photosensitive element provides the necessary rotational degree of freedom for imaging adjustments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces the weight and size of the gimbal system, allows for more compact storage, enhances structural rigidity, and facilitates the use of long-lens configurations by distributing the load more efficiently, resulting in improved controllability and imaging performance.
Implementation Method 1
a servo driver, including a stator connected to the shell, and a rotor rotating relative to the stator
Data Source
AI summary
The present disclosure relates to an improved photosensitive module, a camera module and a gimbal camera apparatus. The photosensitive module includes: a shell, an image sensing assembly and a servo driver, where the servo driver drives the image sensing assembly, so that a photosensitive element rotates relative to the shell to achieve photosensitive effects at different angles. The load of the servo driver of the photosensitive module of the present disclosure is only an image sensor and necessary auxiliary circuits. Compared with a load in the traditional scheme, the load difference is generally one to several orders of magnitude.