Pulse-Duration Communication in Conductive High-Permittivity Media
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Solution Overview
Problem
Communication systems face challenges in transmitting electromagnetic waves over long distances in media with high permittivity and high electrical conductivity, such as water, due to significant signal attenuation and self-oscillating conditions that hinder traditional modulation and demodulation techniques.
Innovation Solution
A system and method utilizing a transmitter with a driver and receiver that modulate data frames with logic high and variable low voltage durations, and a decoder that calculates the duration between rising edges to decode data values, enabling effective communication in high permittivity and conductivity media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electromagnetic communication is used in water or high permittivity media, then communication can be established, but signal attenuation increases dramatically with distance
Solution Approach 1:
The patent changes the fundamental parameters of signal transmission by using acoustic waves instead of electromagnetic waves, and by encoding data in the time duration of signal pulses rather than traditional amplitude or frequency modulation. This allows communication in high permittivity media where electromagnetic waves suffer severe attenuation
Solution Approach 2:
The patent replaces electromagnetic field-based communication with an acoustic/mechanical wave-based system. The transmitter uses a speaker or actuator to generate acoustic pulses, and the receiver uses a microphone or sensor to detect these mechanical waves, bypassing the limitations of electromagnetic wave propagation in conductive media
2Measurement precision
If self-oscillating receiver systems are used in high conductivity media, then signal detection sensitivity increases, but self-oscillation persists and prevents accurate data decoding
Solution Approach 1:
The patent uses periodic acoustic pulse transmission with clearly defined time durations. Each data symbol is represented by a pulse of specific duration, creating regular periodic patterns that are easy to detect and decode without causing sustained self-oscillation in the receiver
Solution Approach 2:
Instead of using continuous electromagnetic carriers that require modulation/demodulation (which cause self-oscillation issues), the patent inverts the approach by using direct time-domain pulse encoding where data is represented by the presence and duration of acoustic pulses themselves, eliminating the need for traditional oscillating receiver systems
3Length of stationary object
If electromagnetic waves are transmitted over long distances, then communication range increases, but signal strength decreases by inverse square of distance
Solution Approach 1:
The patent replaces electromagnetic wave transmission with acoustic wave transmission. Acoustic waves in water or dense media experience different attenuation characteristics compared to electromagnetic waves, enabling longer communication distances without the severe inverse-square-law signal strength degradation
Solution Approach 2:
The patent employs dynamic pulse duration encoding where the length of the acoustic pulse directly represents data values. This allows the system to adapt transmission characteristics to the medium and distance, optimizing signal energy usage and extending effective communication range
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 reliable long-distance data communication by overcoming signal attenuation and self-oscillating issues, allowing for accurate data transmission in challenging environments.
Implementation Method 1
electromagnetic wave strength may be attenuated over long distances. As one of various examples, in radio communication over the air, electromagnetic wave strength follows the inverse square law
Implementation Method 2
a receiver comprising a receive actuator to receive a signal generated by the transmit actuator, an amplifier circuit coupled to the receive actuator
Data Source
AI summary
A communication system may enable communication between a transmitter and receiver in a communication medium with high permittivity and high electrical conductivity. An input data value may be encoded as a duration of time, and a transmit actuator may be driven with a signal based on the encoded duration of time. A receive actuator may receive the signal generated by the receive actuator and may calculate a duration of time in the received signal. The duration of time may be converted into a detected data value, the detected data value to represent the input data value transmitted.