Automatic Door Radar Sensing with IMU Orientation
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Solution Overview
Problem
Conventional automatic door systems rely on limited sensing capabilities, such as bidirectional movement detection and presence sensing, which are not sufficient for enhanced door control, particularly in varying environmental conditions.
Innovation Solution
The automatic door system incorporates a plurality of millimeter wave (mmW) radar sensors with inertial measurement units (IMUs), which generate and combine data to detect, classify, and track multiple targets in a door area, enhancing door control and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional sensors (activation sensor and presence sensor) are used for automatic door control, then the door can detect basic bidirectional movement and presence, but the sensing capability is limited and insufficient for enhanced door control in varying environmental conditions
Solution Approach 1:
The patent combines multiple radar sensors (first radar sensor and second radar sensor) into a unified door control system. These radar sensors are merged with the existing activation sensor and presence sensor to create a multi-sensing system that provides both enhanced adaptability and measurement precision simultaneously
Solution Approach 2:
The radar sensors serve multiple functions: they detect bidirectional movement (like the activation sensor), detect presence in the doorway (like the presence sensor), and additionally provide enhanced sensing capability for various environmental conditions. This multi-functionality resolves the contradiction by making the sensing system both versatile and precise
2Adaptability or versatility
If multiple radar sensors are added to enhance sensing capability, then adaptability and detection accuracy improve, but device complexity increases
Solution Approach 1:
The door control system is segmented into distinct functional modules: the original activation sensor module, the original presence sensor module, and the new radar sensor modules. Each segment handles specific sensing tasks, allowing the system to achieve high adaptability while managing complexity through modular organization
Solution Approach 2:
The door control unit acts as an intermediary that receives data from all sensors (activation sensor, presence sensor, first radar sensor, second radar sensor) and processes this information centrally. This intermediary approach allows multiple sensors to work together without directly increasing operational complexity, as the door control unit manages the integration
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 mmW radar sensor system provides improved sensitivity and accuracy in detecting and tracking targets, enabling more sophisticated door control strategies, increased safety, and reliability in various environmental conditions.
Implementation Method 1
Each radar sensor includes a millimeter wave (mmW) radar configured to generate mmW radar data corresponding to a door area
Implementation Method 2
Each radar sensor further includes an inertial measurement unit (IMU) that is configured to generate IMU data corresponding to an orientation of the mmW radar with respect to a reference coordinate system
Data Source
AI summary
An automatic door can include a plurality of millimeter wave (mmW) sensors that are each configured to sense a door area. Each mmW sensor includes a mmW radar configured to capture mmW radar data and an inertial measurement unit (IMU) configured to measure an orientation of the mmW radar. Based on IMU data from the mmW sensors, the mmW radar data from the sensors can be combined so that the door areas can form a combined door area. Multiple targets can be detected and tracked through the combined door area at high resolutions and in a variety of environmental conditions. Control of the automatic door can be enhanced in a variety of ways by classifying the targets and predicting their movements in the combined door area. Further, the classification and prediction of targets can facilitate safe and reliable operation by filtering operation based on certain targets and/or motions.