Visible Light Communication Lock Device Security
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Solution Overview
Problem
Visible light communication technologies face challenges in ensuring security and reliability, particularly in applications where multiple devices need to communicate simultaneously to unlock mechanisms, as existing methods lack robustness in distinguishing and processing superposed optical signals effectively.
Innovation Solution
A visible light communication method and apparatus that involves multiple transmitting devices sending information through varying luminance and color, with a receiving device processing these signals to form a composite electrical signal only when the superposed light meets a preset condition, using techniques like data statistical averaging and binarization to enhance security and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmitting devices send visible light signals simultaneously, then communication capacity and security are improved, but signal differentiation and processing difficulty increase
Solution Approach 1:
The patent segments the communication system into multiple transmitting devices, each emitting visible light signals with unique characteristics (different frequencies, luminance levels, or colors). This segmentation allows simultaneous transmission from multiple devices while maintaining the ability to distinguish and process each signal individually through the receiving device's analysis of superposed light patterns.
2Loss of information
If multiple devices transmit with different luminance and color, then information capacity increases, but signal superposition complexity increases
Solution Approach 1:
The patent applies local quality by assigning different characteristics (luminance, color, frequency) to different transmitting devices. Each device transmits with specific local properties that distinguish it from others, enabling the receiving device to decode multiple information streams from the superposed signals by analyzing these differentiated local qualities.
3Reliability
If the receiving device processes superposed signals with preset conditions, then security and reliability are improved, but processing time and computational load increase
Solution Approach 1:
The patent implements preliminary action by establishing preset conditions and expected signal patterns before the actual communication occurs. The receiving device is pre-configured with knowledge of what valid superposed signals should look like, allowing it to quickly verify incoming signals against these predetermined criteria rather than performing complex real-time analysis of all possible signal combinations.
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 approach improves the security and reliability of visible light communication by ensuring that only when multiple devices correctly superpose their signals can the receiving device trigger an action, such as unlocking, thereby preventing unauthorized access.
Implementation Method 1
at least two transmitting devices transmit visible light carrying respective corresponding information
Implementation Method 2
a receiving device sends an instruction for correct matching when determining, according to received superposed visible light
Data Source
AI summary
The present disclosure discloses a visible light communication apparatus, a lock device, and a visible light communication method. The visible light communication method includes: transmitting, by at least two transmitting devices, visible light carrying respective corresponding information; and sending, by a receiving device, an instruction for correct matching upon determining, according to received superposed visible light, that the superposed visible light meets a preset condition; where the corresponding information includes at least one of a frequency, luminance, and a color of the visible light transmitted by the transmitting devices and a relative position of the transmitting devices to the receiving device. The method can improve security of visible light communication.