Collaborative Presence Detection With Low-Power Sensor Triggering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing presence detection systems face challenges such as high-power consumption, limited field of view, and privacy concerns, particularly in traditional time-of-flight sensors and camera-based technologies, while ultrasound-based systems suffer from interference and high-power consumption.
Innovation Solution
A method involving non-ultrasound and ultrasound sensors, where low-power sensors determine the presence of a target within a first field of view, triggering high-power sensors for accurate detection, and collaborative sensing among multiple devices to enhance the collective field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional time-of-flight sensors or camera-based technologies are used for presence detection, then detection accuracy is improved, but power consumption increases significantly
Solution Approach 1:
The system implements periodic sensing with variable frequency, switching between low-power non-ultrasound sensors for routine monitoring and high-power ultrasound sensors for detailed detection only when needed. This periodic activation based on detection needs significantly reduces overall power consumption while maintaining detection accuracy when targets are present.
Solution Approach 2:
The sensing system is segmented into two distinct layers: a low-power non-ultrasound sensing layer for broad area monitoring and a high-power ultrasound sensing layer for precise target detection. This segmentation allows each sensor type to operate in its optimal power-performance regime, reducing total power consumption while maintaining overall detection accuracy.
2Use of energy by moving object
If ultrasound sensors are used for presence detection, then power consumption is reduced compared to camera-based systems, but narrow-band interference occurs in the same signal band
Solution Approach 1:
The system merges non-ultrasound sensing and ultrasound sensing into a collaborative multi-modal framework. The non-ultrasound sensors detect targets in the broader spectrum without suffering from narrow-band interference, while ultrasound sensors provide complementary detailed information. This combination allows the system to maintain low power consumption while avoiding the interference problems of pure ultrasound systems.
Solution Approach 2:
The non-ultrasound sensors act as an intermediary layer that filters out interference-prone scenarios before they reach the ultrasound sensors. By first detecting targets using non-ultrasound methods, the system可以避免 activating ultrasound sensors in conditions where they would be susceptible to narrow-band interference, thus reducing overall interference while maintaining power efficiency.
3Device complexity
If a single device performs presence detection, then device complexity is minimized, but the field of view is limited
Solution Approach 1:
The system implements dynamic collaborative sensing where multiple devices dynamically coordinate their sensing operations. Devices adjust their sensing parameters and share detection data in real-time, allowing the collective system to achieve a broader effective field of view while each individual device maintains relatively simple hardware. The collaboration is dynamic, adapting to the spatial distribution and detection needs of the environment.
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
Reduces power consumption and maintains detection accuracy while alleviating privacy concerns, with enhanced sensing performance through collaborative ultrasound sensing.
Implementation Method 1
performing a non-ultrasound sensing of a target using one or more non-ultrasound sensors
Implementation Method 2
performing an ultrasound sensing for the target using the one or more ultrasound sensors
Data Source
AI summary
In some implementations, a sensing device may perform presence detection by performing a non-ultrasound sensing of a target using one or more non-ultrasound sensors of the sensing device. In addition, the sensing device may determine whether the target is within a first field of view (FOV) of one or more ultrasound sensors of the sensing device based on a result of the non-ultrasound sensing, according to a predetermined criterion. The sensing device also may perform an ultrasound sensing for the target using the one or more ultrasound sensors based on the determination of whether the target is within the first FOV.