Optoelectronic Sensor for Electromagnetic Field Sensing
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Solution Overview
Problem
Existing optoelectronic systems for sensing electromagnetic fields at total solid angle face signal distortion due to the use of metallic wires, which reduces sensing accuracy.
Innovation Solution
The system employs non-metal optical fibers to transmit signals, utilizing an optoelectronic module with an optical modulator and detector to sense electromagnetic signals without distortion, and incorporates a spherical space rotating facility for comprehensive angle scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If metallic wires are used to transmit signals in the optoelectronic system, then the system structure is simple and easy to manufacture, but signal distortion occurs and sensing accuracy is reduced
Solution Approach 1:
The patent replaces metallic electrical wiring with optical fiber transmission and optoelectronic conversion. The signal transmission medium is substituted from metal conductors to optical fibers, and the signal conversion is performed through optoelectronic modules that convert electromagnetic signals to optical signals and back, eliminating the harmful interaction between metal and electromagnetic fields that causes signal distortion.
Solution Approach 2:
The patent introduces optoelectronic modules as intermediary devices between the receiving antenna and the signal processing system. These modules convert the received electromagnetic signals into optical signals for transmission, acting as a mediator that isolates the measurement system from the electromagnetic field being measured, thereby preventing signal distortion while maintaining system functionality.
2Reliability
If conventional metal receiving antennas are used, then the device structure is simple, but electromagnetic interference causes sensing errors
Solution Approach 1:
The patent substitutes metal receiving antennas with non-metallic optoelectronic sensing elements. The receiving antenna is replaced by an optoelectronic module that uses optical fibers and photodetectors instead of metal conductors, eliminating the electromagnetic interference that affects metal-based systems while maintaining the ability to detect and measure electromagnetic field signals.
Solution Approach 2:
The optoelectronic module serves as an intermediary between the electromagnetic field and the measurement system. It converts electromagnetic signals into optical signals that are immune to electromagnetic interference during transmission, thereby protecting the measurement system from harmful electromagnetic effects while maintaining reliable sensing capability.
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 enables precise sensing of electromagnetic field power without signal interference, enhancing accuracy and reliability in measuring total radiated power and total isotropic sensitivity.
Implementation Method 1
The optoelectronic module uses a non-metal optical fiber to transmit a signal under test
Implementation Method 2
optoelectronic module with an optical modulator and detector
Implementation Method 3
The optoelectronic module of the optoelectronic system for sensing an electromagnetic field at total solid angle according to the present invention uses a non-metal optical fiber to transmit a signal under test
Data Source
AI summary
The optoelectronic system includes a first rotating shaft, at least one cantilever disposed on the first rotating shaft, a rotating stand for loading an emission source under test and at least one optoelectronic module for sensing an electromagnetic field disposed on a free end of the cantilever for sensing an electromagnetic signal emitted from the emission source under test. The rotating stand has a second rotating shaft perpendicular to the first rotating shaft. Preferably, the optoelectronic system includes two optoelectronic sensing modules positioned in an orthogonal manner. Further, the optoelectronic system includes two cantilevers spaced 180° apart and two optoelectronic sensing modules positioned on two free ends of the two cantilevers in an orthogonal manner.