Pan-tilt device with vertical rail for high-speed tracking
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Solution Overview
Problem
Current pan-tilt devices for surveillance cameras lack high-speed and high-precision capabilities, especially when tracking objects at varying distances and speeds, and are often expensive and inflexible, making it difficult to capture clear images of individuals, especially when they wear hats or are obscured by umbrellas.
Innovation Solution
A high-speed and high-resolution pan-tilt device using motors and screws for precise panning and tilting, combined with a vertical movement mechanism along a rail, allowing adjustable height and angle changes to track objects effectively, with a simple and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide-range surveillance camera is used to monitor a large area, then the coverage area is improved, but the resolution and ability to recognize faces is deteriorated
Solution Approach 1:
The surveillance system is segmented into multiple cameras with different functions: wide-range surveillance cameras for large area coverage and high-resolution tracking cameras for detailed face recognition. This segmentation allows each camera to optimize for its specific function rather than trying to achieve both wide coverage and high resolution with a single camera.
Solution Approach 2:
The tracking camera is mounted on a pan-tilt device that dynamically adjusts its position and orientation to follow moving targets. This dynamic positioning allows the high-resolution camera to maintain focus on specific areas of interest, effectively increasing the resolution for tracked objects while preserving overall surveillance coverage.
2Speed
If the pan-tilt device adjusts angles rapidly to track moving objects, then the tracking speed is improved, but the precision and stability of angle control is deteriorated
Solution Approach 1:
The pan-tilt device incorporates feedback control mechanisms that continuously monitor the actual angle positions and adjust motor commands to achieve desired precision. This feedback system allows rapid angle changes for tracking moving objects while maintaining accurate positioning control, resolving the contradiction between speed and precision.
Solution Approach 2:
The system dynamically changes operational parameters such as motor speed and acceleration based on the movement characteristics of the tracked object. For rapidly moving targets, higher speeds are used; for stationary or slow-moving targets, lower speeds with higher precision are employed, allowing the system to optimize both speed and precision according to real-time conditions.
3Measurement precision
If the pan-tilt device is designed with high precision for tracking slow-moving objects at long distances, then the angle precision is improved, but the response speed for tracking fast-moving objects is deteriorated
Solution Approach 1:
The pan-tilt device employs dynamic control that adapts its response characteristics based on the movement speed of the tracked object. The system can switch between high-precision mode for stationary targets and high-speed mode for moving targets, allowing it to excel at both tracking slow-moving objects with precision and responding quickly to fast-moving objects.
Solution Approach 2:
The control system uses periodic adjustment cycles that are adapted to the movement characteristics of the target. For slow-moving objects, more frequent fine-adjustment cycles maintain precision; for fast-moving objects, larger coarser adjustment cycles maintain response speed. This periodic adaptation allows the system to optimize performance across different tracking scenarios.
4Ease of manufacture
If a fixed-height surveillance camera is used, then the installation simplicity is improved, but the ability to capture faces of obscured individuals is deteriorated
Solution Approach 1:
The surveillance camera system incorporates a vertically adjustable mounting mechanism that transforms the fixed-height installation into a dynamically adjustable configuration. This allows the camera to be positioned at optimal heights for different surveillance scenarios, such as capturing faces of individuals wearing hats or holding umbrellas, while maintaining relatively simple installation procedures.
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 high-resolution image capture and face recognition by ensuring precise and rapid angle adjustments, accommodating objects at various distances and speeds, and allowing height adjustments to capture frontal images, improving surveillance system efficiency and economic feasibility.
Implementation Method 1
a pan unit which includes a pan motor and a pan screw for rotating a camera leftward and rightward
Implementation Method 2
a tilt unit which includes a tilt motor and a tilt screw for rotating the camera upward and downward
Implementation Method 3
a tip portion fixedly supported by a supporter by means of a bearing structure
Data Source
AI summary
A high-speed and high-resolution pan-tilt device capable of changing a height comprises a pan unit, a tilt unit, a support bar, and a base frame. The pan unit includes a pan motor and a pan screw for rotating a camera leftward and rightward. The tilt unit includes a tilt motor and a tilt screw for rotating the camera upward and downward, and moves the entirety of the pan unit upward and downward. The support bar has a tip portion and a rear end portion. The camera is mounted on the tip portion, and is capable of being panned and tilted when an angle of the support bar is changed. The base frame supports the pan unit and the tilt unit.