Buried Conductor Detection System Phase Control
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Solution Overview
Problem
Conventional systems for detecting buried conductors face challenges such as inefficient power usage in active mode transmitters, interference from ambient signals, and the need for operator intervention to adjust signal frequency and power, which can lead to incorrect identification of target conductors due to capacitive coupling with nearby conductors.
Innovation Solution
A system comprising a transmitter and receiver with a communication link that adjusts the phase difference between test signal components, allowing automatic optimization of signal frequency and power to minimize interference and ensure accurate detection, using a duplex or half-duplex wireless or wired communication link, and employing phase difference measurement to distinguish between the target conductor and nearby conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitter uses high power signal to ensure detectable test signal, then the signal detection capability is improved, but battery consumption increases and power is wasted
Solution Approach 1:
The transmitter dynamically adjusts signal power based on feedback from the receiver. The system transitions from static high power transmission to dynamic power control, where the transmitter modifies its output power in response to receiver signals indicating detection status, thereby optimizing energy usage while maintaining reliable detection
Solution Approach 2:
A feedback communication channel is established between receiver and transmitter. The receiver sends feedback signals to the transmitter indicating whether the test signal is successfully detected, enabling the transmitter to adjust its power output accordingly and avoid unnecessary energy consumption
2Measurement precision
If the operator manually adjusts transmitter signal power and frequency, then the detection accuracy is improved, but the operation time and complexity increase
Solution Approach 1:
The system performs self-adjustment of signal parameters. The transmitter automatically modifies its signal power and frequency based on feedback from the receiver, eliminating the need for manual operator intervention and reducing operation time while maintaining detection accuracy
Solution Approach 2:
The feedback mechanism enables automatic parameter optimization. The receiver communicates detection status back to the transmitter, which then autonomously adjusts signal characteristics to achieve optimal detection conditions without requiring repeated manual tuning by the operator
3Measurement precision
If the test signal frequency is changed to avoid ambient interference, then the signal to noise ratio is improved, but the operator intervention requirement increases
Solution Approach 1:
The transmitter autonomously selects and adjusts test signal frequency to avoid ambient interference. Based on feedback from the receiver about detected signal quality and ambient conditions, the transmitter automatically changes frequency parameters without requiring operator input, thereby improving signal to noise ratio while simplifying operation
Solution Approach 2:
The feedback loop provides information about ambient interference levels and signal quality to the transmitter, which then automatically adjusts frequency to optimize the signal to noise ratio. This eliminates the need for manual frequency scanning and selection by the operator
4Area of stationary object
If high power test signal is used to ensure detection, then the detectable range is improved, but capacitive coupling to unwanted lines increases
Solution Approach 1:
The transmitter uses dynamic power adjustment rather than continuously high power. By modulating signal power based on feedback about detection status and interference levels, the system maintains sufficient power for detection while minimizing excessive power that would cause capacitive coupling to adjacent lines
Solution Approach 2:
The feedback mechanism provides information about capacitive coupling interference to the transmitter, which then adjusts signal power to an optimal level that provides sufficient detection range while avoiding over-powering that would cause signal leakage to unwanted conductors through capacitive coupling
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 system efficiently detects buried conductors by optimizing signal power and frequency, reducing battery consumption, and automatically differentiating between the target conductor and nearby conductors, thereby enhancing detection accuracy and operator convenience.
Implementation Method 1
Current carrying conductors emit electromagnetic radiation which can be detected by an electrical antenna
Implementation Method 2
detectors to detect the electromagnetic field emitted by conductors carrying alternating current
Implementation Method 3
a radio link is established which allows an operator who is remote from the transmitter to interrogate the transmitter from the receiver
Data Source
Figure 1~3
Figure 4
Figure 5
AI summary
A system 1 for detecting a buried conductor 3 comprises a transmitter 5 for producing an alternating test current in the buried conductor 3 and a receiver 7 for detecting an electromagnetic field 11 produced by the test current in the buried conductor 3. A communication link is provided between the receiver 7 and the transmitter 5. The test current comprises first and second components of different frequency. The receiver 7 monitors the phase creepage of the first and second components and controls the transmitter 7 to reset the phase difference between the first and second components as phase creepage increases.