Magnetic Field Sensing for Motor Rotation Angle Detection
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Solution Overview
Problem
There is a need for more accurate detection of the motor's rotation angle in pan-tilt camera systems to enable precise control over the camera's surveillance area switching.
Innovation Solution
The attitude adjustment apparatus includes a driving device with a motor and a sensing unit that generates and senses changes in a magnetic field, with a target object having blades that alter the magnetic field, allowing the control device to determine the motor's rotational angle through feedback control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a hall sensor is used to detect the rotation angle of the motor, then the detection is simple and cost-effective, but the measurement precision of the rotation angle is insufficient for precise control requirements
Solution Approach 1:
The patent replaces the conventional hall sensor-based mechanical detection system with a magnetic field sensing system. The sensing unit generates a magnetic field that interacts with the target object, and changes in the magnetic field are detected to determine rotation angle. This substitution of mechanical detection with magnetic field-based detection enables higher precision measurement while maintaining relatively simple device structure.
Solution Approach 2:
The patent changes the detection parameter from direct magnetic field strength measurement (hall sensor) to measurement of magnetic field changes induced by target rotation. By monitoring how the target object alters the generated magnetic field during rotation, the system achieves more precise rotation angle detection through parameter transformation.
2Measurement precision
If multiple sensing units are used to improve detection accuracy, then the measurement precision increases, but the device complexity and computational requirements increase
Solution Approach 1:
The patent divides the sensing system into multiple sensing units, each responsible for detecting specific aspects of the magnetic field changes. By segmenting the detection function across multiple units, the system achieves comprehensive measurement coverage and higher precision while maintaining modular architecture that manages complexity.
Solution Approach 2:
The sensing units are designed to perform multiple functions: generating the magnetic field, detecting magnetic field changes, and providing data for rotation angle calculation. This multi-functionality reduces the need for separate dedicated components, thereby increasing precision without proportionally increasing overall system complexity.
3Productivity
If conventional rotation detection methods are used, then the device structure is simple, but the productivity and control precision of the pan-tilt system are limited
Solution Approach 1:
The patent implements a feedback control system where the sensing unit continuously monitors magnetic field changes during motor rotation, and the control device uses this real-time data to adjust and refine the rotation angle determination. This feedback mechanism enables both high-speed operation and precise control, improving productivity without sacrificing measurement precision.
Solution Approach 2:
The sensing unit generates the magnetic field in advance before the target object rotates, and the system is prepared to detect changes as the target passes through the magnetic field. This preliminary preparation of the magnetic field enables rapid detection and response, improving the speed of surveillance area switching while maintaining precision.
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
This solution enables accurate and efficient attitude adjustment of the target object by determining the position of blades based on input values for driving motors, reducing computational requirements and improving precision.
Implementation Method 1
a sensing unit, which generates a magnetic field and senses changes in the generated magnetic field
Data Source
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AI summary
The present invention relates to an attitude adjustment apparatus and method, and more particularly, to an attitude adjustment apparatus and method, which are capable of adjusting the attitude of a target object through feedback control. The attitude adjustment apparatus includes: a driving device including a motor and thereby generating a driving force; and a control device adjusting an attitude of a target object by referencing a rotational angle of the motor, wherein the driving device includes a sensing unit, which generates a magnetic field and senses changes in the generated magnetic field, and a target, which is rotated by the driving force of the motor, includes a plurality of blades, and alters the magnetic field generated by the sensing unit, and the control device determines the rotational angle of the motor by referencing a target rotational angle and sensing result data from the sensing unit.