Barrier Status Detection Using Gyroscope and IIR Filtering
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Solution Overview
Problem
Existing systems face challenges in accurately determining the open/close status of doors on moveable platforms, such as containers, due to orientation changes during transportation, and are prone to false readings and hardware damage from rough handling.
Innovation Solution
A sensor device mounted on the door, equipped with an accelerometer and rotation sensor, uses gyroscope data to account for orientation and employs IIR filters to process noisy measurement data, allowing for reliable open/close status detection even when the platform is in motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional sensors are used to detect door status, then the system is simple, but false readings occur due to orientation changes during transportation
Solution Approach 1:
The patent combines multiple sensors (accelerometer, rotation sensor, and optionally magnetometer) into a single sensor device mounted on the door. This merging allows the system to capture both linear acceleration and rotational orientation data, enabling accurate door status detection despite platform movement and orientation changes during transportation.
Solution Approach 2:
The patent replaces traditional mechanical door status sensors with an inertial measurement system using accelerometers and rotation sensors. This substitution eliminates the need for complex mechanical linkages and contact-based detection, reducing false readings caused by orientation changes while maintaining system simplicity through electronic processing of sensor data.
2Productivity
If the platform moves during door operation, then transportation efficiency is improved, but measurement data becomes noisy and unreliable
Solution Approach 1:
The patent employs dynamic signal processing techniques that adapt to platform movement conditions. The system uses complementary filtering and sensor fusion algorithms that remain effective whether the platform is stationary or moving, allowing reliable door status detection during transportation without requiring the platform to stop.
Solution Approach 2:
The patent transforms raw sensor data into meaningful door status information by applying signal processing transformations. The system changes parameters such as filtering frequency ranges and integration time windows based on platform motion characteristics, enabling accurate detection even when the platform is in motion during transportation operations.
3Speed
If rough handling occurs during loading/unloading, then operational speed is improved, but hardware damage and false events increase
Solution Approach 1:
The patent implements shock absorption mechanisms through software algorithms that detect and filter out transient signals caused by rough handling. The system uses acceleration threshold detection and signal validation logic to distinguish between legitimate door movement and spurious signals from vibrations or impacts during loading and unloading operations, preventing false events while allowing rapid operations.
4Measurement precision
If multiple sensors are used to improve accuracy, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent designs a sensor device where a single integrated unit performs multiple functions: the accelerometer detects linear motion and shock, the rotation sensor captures angular orientation changes, and together they enable door status detection, platform motion detection, and shock event identification. This multi-functionality reduces the need for separate sensor systems while maintaining high measurement 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
The solution provides robust and accurate detection of door status, reducing false events and hardware failures, while minimizing additional costs and complexity.
Implementation Method 1
A sensor device mounted on the door, equipped with an accelerometer and rotation sensor
Implementation Method 2
uses gyroscope data to account for orientation
Data Source
AI summary
In some examples, a method determines an open/close status of a pivotable barrier on a moveable platform based on selective use of a plurality of different filters for filtering measurement data from a sensor device.