Sensor Module Coil Layout for Higher Torque Anti-Shake Drive
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Solution Overview
Problem
Existing sensor driving devices suffer from poor rotational torque and anti-shaking performance due to the reliance on upper and lower driving coils, resulting in inadequate driving effect.
Innovation Solution
A sensor driving device design featuring multiple groups of driving coils and magnets, where each group consists of two perpendicular coils and magnets, with an orthographic projection of one coil partially within the other, allowing for greater rotational torque and synchronized movement of the sensor module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If only upper and lower driving coils are used, then the structure is simple, but the rotational torque is small and driving effect is poor
Solution Approach 1:
The driving system is segmented into multiple independent coil groups (first, second, third, and fourth driving coils) positioned at different locations around the sensor module. Each coil group can be independently controlled to generate electromagnetic force in specific directions, enabling comprehensive rotational driving capability while maintaining structural modularity.
Solution Approach 2:
The patent transitions from a one-dimensional driving approach (upper and lower coils only) to a multi-dimensional driving configuration by adding coils at peripheral positions (first, second, third, and fourth driving coils) around the sensor module. This spatial expansion in multiple dimensions enables generation of rotational torque in various directions simultaneously.
2Reliability
If only upper and lower driving coils are used, then the device complexity is low, but the anti-shaking performance is poor
Solution Approach 1:
The anti-shaking function is segmented into multiple independent driving channels through separate coil groups positioned at different locations. Each coil group can be independently activated to counteract vibrations in specific directions, providing comprehensive anti-shaking protection while allowing flexible control for different vibration scenarios.
Solution Approach 2:
The multiple driving coils are configured to serve multiple functions: they can work together to generate rotational torque for positioning, and individually or in combination to counteract vibrations in different directions. This multi-functionality enables the system to handle both positioning and anti-shaking requirements effectively.
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 design achieves enhanced rotational torque and improved anti-shaking performance by utilizing multiple groups of driving coils in series, providing greater rotational thrust and stability.
Implementation Method 1
When a current is applied by the driving coil, an electromagnetic field is generated between the driving coil and the magnet
Implementation Method 2
the driving coil is subjected to the Lorentz force of the electromagnetic field, which drives the driving coil to move in the direction perpendicular to the optical axis
Data Source
AI summary
Provided is a sensor driving device, including: a housing, a sensor module, an elastic support assembly, driving coils, and driving magnets. There are a plurality of groups of driving coils spaced apart from each other. Each group of driving coils includes two coils perpendicular to each other, and driving directions of the two coils are perpendicular to the optical axis, and an orthographic projection of one coil toward the other coil is at least partially located within the other coil. There are a plurality of groups of driving magnets spaced apart from each other. The driving magnets are corresponding to and spaced apart from the driving coils. The driving magnets interact with the driving coils to drive the sensor module to move in a direction perpendicular to the optical axis. The sensor driving device has a large rotational torque, good driving effect, and good anti-shaking performance.