Wireless Detection Device for Hidden Object Distance Measurement
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Solution Overview
Problem
Current home security systems lack the ability to effectively detect hidden individuals, such as those behind walls, which hinders immediate reaction and response, like calling the police or security.
Innovation Solution
A wireless detection device and method that generates oscillation signals with varying frequencies, outputs wireless signals, and calculates the real distance of an object by demodulating reflected signals, using a voltage control oscillation unit, transceiving unit, demodulation unit, and processing unit to determine the presence and type of an object based on frequency variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional detection devices are used, then the device structure is simple, but the ability to detect hidden individuals is insufficient
Solution Approach 1:
The detection device is divided into multiple functional modules: signal generation unit, signal transmission unit, signal reception unit, and processing unit. Each module performs a specific function in the detection process, allowing the system to achieve sophisticated detection capabilities while maintaining modular simplicity in design and implementation.
Solution Approach 2:
The detection device integrates multiple functions into a single system: it can detect hidden individuals, measure distances, identify physiological frequencies (heartbeat, breathing), and provide real-time monitoring. This multi-functionality resolves the contradiction by achieving comprehensive detection capability without requiring multiple separate devices.
2Area of stationary object
If wireless signals are transmitted to detect hidden objects, then the detection range is extended, but the signal interference and detection precision are reduced
Solution Approach 1:
The system transmits wireless signals periodically and uses multiple frequency components in the oscillation signals. By analyzing the periodic reflections and frequency variations, the system can distinguish between different objects and measure distances accurately even in extended detection areas with potential signal interference.
Solution Approach 2:
The signal generation unit dynamically adjusts the frequency and characteristics of transmitted signals based on detection needs. The processing unit dynamically analyzes received signals to extract distance and physiological information, maintaining precision across varying detection conditions and extended areas.
3Measurement precision
If multiple oscillation signals with different frequencies are generated, then the detection accuracy is improved, but the energy consumption increases
Solution Approach 1:
The system generates multiple frequency components in the oscillation signals, but not all frequencies are transmitted with equal power or continuously. The processing unit identifies and analyzes only the relevant frequency components that provide detection information, achieving high accuracy while minimizing unnecessary energy expenditure on redundant frequency transmissions.
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
Enables the detection of hidden objects and organisms, including humans, by calculating real distances and identifying physiology frequencies, allowing for accurate determination of whether an organism is present and its type, thereby enhancing home security.
Implementation Method 1
receiving second wireless signals generated by reflection of the first wireless signals
Implementation Method 2
a voltage control oscillation unit, generating a plurality of oscillation signals with different frequencies according to analog control voltages and corresponding injection signals
Implementation Method 3
a demodulation unit, configured to demodulate the oscillation signals into first voltage signals
Data Source
AI summary
A wireless detection device is provided, comprising a voltage control oscillation unit, a transceiving unit, demodulation unit and processing unit. The voltage control oscillation unit generates different oscillation signals according to analog control voltages and corresponding injection signals. The transceiving unit outputs first wireless signals to a predetermined area according to the oscillation signals and receives second wireless signals generated by reflection of the first wireless signals to generate the injection signal. The demodulation unit demodulates the oscillation signals into first voltage signals. The processing unit subtracts the corresponding analog control voltages from the first voltage signals to generate second voltage signals, and when the variation of the second voltage signals exceeds a predetermined value on a target frequency in frequency domain, the processing unit calculates a real distance between an object and the transceiving unit.