Acoustic Space Status Detection Using Audio Signal Processing
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Solution Overview
Problem
The high hardware cost of existing safety monitoring systems in smart homes poses a challenge for reducing costs while maintaining effective safety monitoring functions.
Innovation Solution
A space status detection apparatus and system based on acoustic signals, comprising an audio transmitting device, a signal processing device, and a decision device, which transmits and receives acoustic signals to generate characteristic parameters for detecting changes in space status, thereby reducing hardware costs and improving monitoring efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety monitoring systems are used, then monitoring reliability is improved, but hardware cost increases
Solution Approach 1:
The audio transmitting device and audio receiving device are designed to serve multiple functions: they can perform safety monitoring, space status detection, and acoustic signal transmission/reception. By making these devices universal, the system reduces the need for separate specialized sensors, thereby lowering hardware costs while maintaining monitoring reliability
Solution Approach 2:
The system uses existing audio devices that can transmit and receive acoustic signals to automatically detect space status changes. The devices serve themselves by utilizing their inherent acoustic capabilities without requiring additional complex sensor systems, reducing both hardware complexity and cost
2Device complexity
If simple audio devices are used, then hardware cost is reduced, but measurement precision deteriorates
Solution Approach 1:
The system replaces complex mechanical sensor systems with acoustic signal-based detection. By using sound wave transmission and reception, the system achieves precise space status detection without requiring sophisticated mechanical sensors, thereby reducing hardware complexity while maintaining or improving measurement precision
Solution Approach 2:
The system changes the detection parameter from traditional sensor measurements to acoustic signal characteristics. By analyzing parameters such as sound wave reflection, absorption, and transmission properties, the system achieves accurate space status detection using simple audio devices, resolving the contradiction between device simplicity and 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 system effectively detects changes in space status using acoustic signals, reducing hardware costs and mitigating issues like signal blind angles and transceiving directivity, while maintaining reliable safety monitoring.
Implementation Method 1
an audio transmitting device is configured to transmit an acoustic signal into a space, and an audio receiving device is configured to receive a varied acoustic signal which is the transmitted acoustic signal varied in the space
Data Source
AI summary
An apparatus, a system and a method for space status detection based on acoustic signal are provided. The detecting apparatus includes an audio transmitting device, an audio receiving device, a signal processing device and a decision device. The audio transmitting device transmits an acoustic signal into a space. The audio receiving device receives a varied acoustic signal as a sensing signal. The signal processing device is coupled to the audio receiving device to receive the sensing signal and generates a characteristic parameter of a space status according to the sensing signal. The decision device is coupled to the signal processing device to receive the characteristic parameter and detects a change of the space status according to the characteristic parameter.