Twisted-Pair Signal Transmission for Faster Controlled-Source Turn-Off
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Solution Overview
Problem
Existing signal transmission devices in electrical and electromagnetic prospecting methods suffer from long turn-off times due to wire inductance, which interferes with secondary field signals, affects early-stage signal acquisition, and degrades signal-to-noise ratios in later stages.
Innovation Solution
A signal transmission device comprising a first electronic switch, a twisted pair cable, and a second electronic switch, where the first switch forms a bridge arm and the second switch controls the turn-on and turn-off of the twisted pair cable, significantly reducing the turn-off time of the electromagnetic field and ground current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single long wire is used to connect the ground to form a closed loop, then the device structure is simple, but the turn-off time of the current is long due to wire inductance
Solution Approach 1:
The patent divides the single long wire into multiple segments by introducing a twisted pair cable with multiple wires. The current path is segmented into multiple parallel conductors, which reduces the overall inductance and enables faster current turn-off while maintaining structural simplicity through modular connection.
Solution Approach 2:
The patent transitions from a single-wire one-dimensional structure to a multi-wire three-dimensional twisted pair structure. This dimensional change allows the current to flow through multiple parallel paths, effectively reducing inductance and turn-off time while keeping the device structure manageable.
2Object-generated harmful factors
If a long turn-off time of transmitting current is used, then the wire inductance is low, but the secondary field signal is seriously interfered with and early stage signal acquisition is affected
Solution Approach 1:
By segmenting the current path into multiple parallel wires in the twisted pair cable, the patent reduces the total inductance. This segmentation allows the current to distribute across multiple conductors, minimizing the harmful inductive effects while preserving signal quality for early stage acquisition.
Solution Approach 2:
The patent converts the potential harm of long turn-off time by using the twisted pair structure to reduce inductance. The multi-wire configuration transforms what would be a single high-inductance path into multiple lower-inductance parallel paths, turning the inductance issue into a benefit for signal quality.
3Device complexity
If a long turn-off time of transmitting current is used, then the wire structure is simple, but the high frequency characteristic of transmitting signal is affected
Solution Approach 1:
The patent employs a three-dimensional twisted pair cable structure with multiple wires instead of a simple one-dimensional single wire. This dimensional complexity enables better high frequency characteristics by providing multiple current paths that reduce inductance, while the twisted pair geometry maintains manageable device complexity.
Solution Approach 2:
The patent uses a composite wire structure consisting of multiple conductors twisted together. This composite configuration combines the advantages of multiple parallel paths for reduced inductance with the mechanical benefits of twisted pair construction, achieving both low inductance and acceptable structural complexity.
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 proposed solution effectively shortens the turn-off time of the electromagnetic field and ground current, improving signal quality in early stages and enhancing signal-to-noise ratios in later stages, especially in time domain methods, and improving high-frequency characteristics in frequency domain methods.
Implementation Method 1
The current in an output wire generates and radiates an electromagnetic signal, and loads a current signal to the ground
Data Source
AI summary
A signal transmission device for reducing a turn-off time of an electromagnetic controlled source includes a first electronic switch, a twisted pair cable and a second electronic switch. The first electronic switch constitutes a bridge arm, and includes a first bridge arm switch, a second bridge arm switch, a third bridge arm switch and a fourth bridge arm switch. The second electronic switch is configured to control turn-on and turn-off of the twisted pair cable. The signal transmission device and ground constitute a signal transmission loop.