Pan/Tilt Camera Motion Sensor Hunting Prevention
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Solution Overview
Problem
Pan/tilt cameras experience abnormal operations such as hunting when their position or direction is changed by external forces, leading to missed object tracking and potential finger catching, with existing technologies failing to provide effective warnings or measures for such failures.
Innovation Solution
Incorporating a motion sensor to detect physical movements of the camera body and control the pan/tilt mechanism's operation based on threshold values, stopping the mechanism when significant movement is detected and resuming when movement subsides, while also managing recording and power saving modes to prevent unnecessary operation and conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the pan/tilt mechanism operates automatically to track objects, then object tracking capability is improved, but the system becomes vulnerable to abnormal operations like hunting when the camera body is moved by external force
Solution Approach 1:
The system uses a motion sensor to detect physical movement of the camera body and feeds this information back to the control unit. When movement exceeds a threshold, the control unit stops the pan/tilt mechanism, preventing hunting and abnormal tracking operations. This feedback loop ensures reliable tracking by adapting the tracking behavior to the actual physical state of the camera.
Solution Approach 2:
The system dynamically adjusts the operation state of the pan/tilt mechanism based on real-time motion detection. Instead of maintaining a fixed automatic tracking mode, the system transitions between tracking mode and stopped state according to the detected motion level, making the tracking system adaptable to external disturbances.
2Duration of action of stationary object
If the pan/tilt mechanism continues operating during camera body movement, then continuous tracking is maintained, but harmful effects such as finger catching and repeated hunting operations occur
Solution Approach 1:
The system performs preliminary detection of camera body movement using the motion sensor before harmful operations can occur. When movement is detected, the control unit proactively stops the pan/tilt mechanism in advance, preventing hunting and finger catching incidents before they can happen.
Solution Approach 2:
The motion sensor continuously monitors camera body movement and provides real-time feedback to the control unit. This feedback enables the system to immediately stop the pan/tilt mechanism when movement exceeds safe thresholds, preventing harmful operations.
3Reliability
If the pan/tilt mechanism is stopped frequently to prevent hunting, then reliability is improved, but productivity decreases due to interruptions in object tracking
Solution Approach 1:
The system changes the operational parameters of the pan/tilt mechanism based on motion detection thresholds. By adjusting the stop/resume behavior according to the magnitude and duration of detected motion, the system maintains tracking accuracy while minimizing interruptions to productivity.
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
Prevents abnormal operations like hunting by ensuring accurate tracking and maintaining high-quality image recording, while reducing power consumption by optimizing the camera's operational modes based on movement detection.
Implementation Method 1
a motion sensor that detects a physical amount related to the movement of the camera body
Data Source
AI summary
An imaging device (pan/tilt camera) includes an imaging unit including an imaging lens and an imaging element, a pan/tilt mechanism that rotates the imaging unit in the horizontal direction and the vertical direction with respect to a camera body, an object detection unit that detects an object, which is a tracking target, from a moving image captured by the imaging unit, a pan/tilt control unit that controls the pan/tilt mechanism such that the object detected by the object detection unit is tracked, a motion sensor that detects a physical amount related to the movement of the camera body, and an operation control unit that stops the pan/tilt mechanism in a case in which the physical amount detected by the motion sensor is equal to or greater than a first threshold value.