Mobile Sensor Positioning Platform for Electromagnetic Measurements
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Solution Overview
Problem
Existing measurement methods for electromagnetic emissions of large devices under test, such as energy transformers, are inaccurate, risky, and interfere with the emissions due to manual handling and conductive materials, leading to health hazards and unreliable results.
Innovation Solution
A spatial positioning device with a sensor mounting platform, lifting means, and transport means made of electrically non-conductive materials, featuring individual wheel suspensions and chain drives, allowing precise, non-interfering measurements by minimizing electromagnetic interference and stabilizing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual measurement methods are used with handheld devices and tape measures, then measurement flexibility is maintained, but measurement precision and repeatability deteriorate due to human error and health risks
Solution Approach 1:
The positioning device autonomously navigates and positions itself around the device under test using onboard sensors and control systems, eliminating the need for manual handling while achieving high measurement precision through automated positioning and data collection
Solution Approach 2:
Manual mechanical measurement operations are replaced by an automated mobile measurement system with electronic positioning, sensor-based detection, and computer-controlled data acquisition, thereby improving precision while reducing human involvement
2Measurement precision
If conductive materials are used in the positioning device structure, then structural strength is improved, but electromagnetic interference increases affecting measurement accuracy
Solution Approach 1:
The electrical conductivity parameter of the positioning device materials is changed from conductive to non-conductive state by using materials such as fiberglass-reinforced plastics and non-conductive composites, thereby eliminating electromagnetic interference while maintaining adequate structural strength for the application
Solution Approach 2:
Non-conductive composite materials combining fiberglass reinforcement with plastic matrices are used to achieve both sufficient mechanical strength and electrical non-conductivity, resolving the contradiction between structural requirements and electromagnetic interference prevention
3Measurement precision
If the sensor is positioned close to the device under test, then measurement accuracy is improved, but electromagnetic interference from the device under test increases affecting the sensor
Solution Approach 1:
A non-conductive positioning structure serves as an intermediary between the sensor and the device under test, allowing the sensor to be positioned close enough for accurate measurement while the non-conductive material prevents electromagnetic interference from affecting the sensor
4Measurement precision
If the positioning device structure is made rigid, then structural stability is improved, but vibration and oscillation during movement increase affecting measurement accuracy
Solution Approach 1:
The positioning device transitions from a purely rigid structure to a dynamic system with controlled flexibility, where the non-conductive composite materials provide sufficient structural stability while allowing vibration damping, and active control systems compensate for movements to maintain measurement precision
Data Source
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AI summary
Spatial positioning device, comprising a sensor mounting platform (S) to mount a sensor means, a lifting means (L) to lift the sensor means vertically, a transport means (T) to move the lifting means (L) horizontally, wherein the lifting means (L) is arranged between the sensor mounting platform (S) and the transport means (T), and the transport means (T) comprises at least two wheels with respective axles, which wheels having an individual suspension means, and which axles are arranged in one plane, and the sensor mounting platform, the lifting means (L) and the transport means (T) are mainly made of an electrically non-conductive material.