Phase Difference Warning System for Accurate Distance Detection
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Solution Overview
Problem
Existing warning systems for preventing loss or theft of personal items are inconvenient and prone to error alarms due to limited signal range and environmental interference, making it difficult to accurately detect when items are beyond a safe distance from the user.
Innovation Solution
A warning system comprising a monitoring device with a wireless transmitter, receiver, phase analyzer, and warning indicator that transmits a detection signal and analyzes the phase difference between the detection and feedback signals to determine if the controlled device is within a preset warning range, triggering a warning action when the phase difference exceeds the threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a short-range signal (e.g., Bluetooth with 10m effective length) is used for monitoring, then the warning system can detect items within close proximity, but it causes frequent false alarms due to environmental interference and signal loss
Solution Approach 1:
The patent changes the detection parameter from simple signal presence/absence to phase difference measurement. By measuring the phase difference between transmitted and received signals, the system can accurately determine distance even in the presence of environmental interference, thereby improving both measurement precision and reducing false alarms
Solution Approach 2:
The patent replaces traditional mechanical proximity detection methods with electromagnetic phase analysis. Instead of relying on signal strength or presence, the system uses phase difference analysis of electromagnetic waves to determine distance, which is more accurate and less susceptible to environmental interference
2Length of stationary object
If a long-range signal (e.g., 50m effective distance) is used for monitoring, then the alarm activation distance is extended, but the system becomes impractical as it only alarms when items are very far away
Solution Approach 1:
The patent implements dynamic warning range adjustment based on phase difference thresholds. The system can set different phase difference thresholds corresponding to different warning distances, allowing flexible adjustment of the practical warning range to suit different user needs and scenarios
Solution Approach 2:
The patent changes the detection parameter from simple signal presence/absence to phase difference measurement. By measuring the phase difference between transmitted and received signals, the system can accurately determine distance even in the presence of environmental interference, thereby improving both measurement precision and reducing false alarms
3Loss of information
If signal-based proximity detection is used, then the system can monitor item location, but environmental interference causes error alarms that confuse users
Solution Approach 1:
The patent replaces traditional mechanical proximity detection methods with electromagnetic phase analysis. Instead of relying on signal strength or presence, the system uses phase difference analysis of electromagnetic waves to determine distance, which is more accurate and less susceptible to environmental interference
Solution Approach 2:
The patent implements a feedback mechanism where the monitoring device receives feedback signals from controlled devices and analyzes phase differences. This closed-loop feedback system continuously monitors and adjusts distance measurements, improving reliability by compensating for environmental interference through comparative analysis
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
This solution effectively reduces false alarms and provides a reliable method to remind users when their belongings are outside the safe range, ensuring timely notification without the limitations of short signal ranges or interference.
Implementation Method 1
the wireless transmitter can transmit a detection signal, which makes the controlled device transmit a feedback signal in response to the detection signal after receiving the detection signal
Implementation Method 2
the wireless receiver can receive the feedback signal
Implementation Method 3
The phase analyzer can analyze a phase difference between the detection signal and the feedback signal
Data Source
AI summary
A warning system includes a monitoring device and a controlled device, wherein the controlled device includes a wireless transmitter, a wireless receiver, a phase analyzer and a warning indicator. The wireless transmitter can transmit a detection signal, and then the controlled device responses to the detection signal and transmits a feedback signal. The wireless receiver can receive the feedback signal. The phase analyzer can analyze a phase difference between the detection signal and the feedback signal. The warning indicator can perform a warning action when the phase difference is greater than a preset value. Moreover, a method for monitoring a controlled device is disclosed in specification.