Pan-Tilt Attitude Control Using Magnetic Rotation Angle Sensing
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Solution Overview
Problem
Existing surveillance systems lack precise control over the switching of camera surveillance areas, necessitating improved detection of motor rotation angles for accurate attitude adjustment.
Innovation Solution
An attitude adjustment apparatus and method utilizing magnetic field sensors to detect changes in magnetic fields generated by rotating blades, enabling precise determination of motor rotation angles through feedback control, allowing for accurate adjustment of a target object's attitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hall sensors are used to detect motor rotation angles in pan-tilt equipment, then the system can achieve basic surveillance area switching, but the rotation angle detection precision is insufficient for precise control requirements
Solution Approach 1:
The sensing system is segmented into multiple independent magnetic field sensors (first sensing portion and second sensing portion), each responsible for detecting rotation angles of specific motors (first motor and second motor). This segmentation allows for precise local measurement while maintaining modular system architecture that doesn't overly increase complexity.
Solution Approach 2:
The patent replaces traditional mechanical hall sensors with a magnetic field-based detection system using coils to generate magnetic fields and sensors to detect changes in these fields. This substitution enables more precise rotation angle detection through magnetic field changes caused by rotating blades, achieving higher measurement precision while maintaining system simplicity through non-contact sensing.
2Measurement precision
If multiple sensors and sensing portions are added to improve rotation angle detection accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
Each sensing portion is designed to serve multiple functions: generating magnetic fields through coils, detecting field changes via sensors, and determining rotation angles of specific motors. This multi-functionality reduces the need for separate components for each function, thereby improving measurement precision without proportionally increasing device complexity.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary medium between the rotating motors and the detection system. Coils generate magnetic fields that interact with rotating blades, and sensors detect changes in these fields to determine rotation angles. This intermediary approach enables precise non-contact measurement while keeping the physical sensing components relatively simple.
3Manufacturing precision
If traditional surveillance systems are used, then the system structure remains simple, but the control precision over surveillance area switching is insufficient
Solution Approach 1:
The patent implements feedback control by using magnetic field sensors to continuously detect the rotation angles of motors, comparing detected angles with target angles, and adjusting motor positions accordingly. This feedback mechanism enables precise control of surveillance area switching by continuously monitoring and correcting the attitude of the camera system.
Solution Approach 2:
The attitude adjustment apparatus employs dynamic control of motor rotation angles through real-time detection of magnetic field changes. The system can adjust the pan and tilt angles dynamically based on detected position information, enabling precise and flexible surveillance area switching rather than fixed predetermined positions.
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
Enables precise and computationally efficient adjustment of a target object's attitude by accurately determining motor rotation angles, reducing computational load and enhancing surveillance area control.
Implementation Method 1
a first coil configured to generate the first magnetic field
Implementation Method 2
a first magnetic field sensor configured to sense the changes in the first magnetic field caused by the plurality of first blades
Implementation Method 3
a second coil configured to generate the second magnetic field
Implementation Method 4
a second magnetic field sensor configured to sense the changes in the second magnetic field caused by the plurality of second blades
Data Source
AI summary
Embodiments of the present disclosure relate to an attitude adjustment apparatus and method capable of adjusting attitude of a target object. An attitude adjustment apparatus includes a base part, a first part rotatably coupled to the base part, a second part fixedly coupled to a target object and rotatably coupled to the first part, and a controller adjusts an attitude of the target object by controlling the rotation of the first and second parts, wherein the base part and the first part include motors, which generate driving force, sensing portions, which generate a magnetic field and detects changes in the magnetic field, and targets, which are rotated by the driving force from the motors and include blades that change the generated magnetic field. The controller determines a rotation angle of the motors by referencing identification information of reference blades, among the blades, and sensing results from the sensing portions.