Wave-Based Sensor Signal Correction Using Interference Detection
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Solution Overview
Problem
Wave-based sensor systems are susceptible to interference from disturbances such as interfering sound or electromagnetic waves, leading to impaired results and the need for external shielding, which increases costs and limits flexibility in different environments.
Innovation Solution
A wave-based sensor system with an interference detection unit to detect and correct sensor signals using a signal processing circuit, reducing the need for external shielding and enhancing robustness against disturbances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external shielding means are employed to prevent interfering waves from reaching the receiver unit, then the reliability of the sensor system against disturbances is improved, but the manufacturing costs increase and the device complexity increases
Solution Approach 1:
The patent applies this principle by using the interfering waves themselves as the measurement object. Instead of trying to block or eliminate the interference, the system employs additional receiver units to detect the interfering waves and uses signal processing to separate and utilize them as useful information about the scattering object, thereby converting a harmful factor into a beneficial measurement signal
Solution Approach 2:
The patent implements this principle by making the receiver units serve multiple functions: they simultaneously receive both the useful reflected waves from the scattering object and the interfering waves. This multi-functionality eliminates the need for separate shielding structures, as the same hardware components perform both measurement and interference detection tasks
2Reliability
If external shielding means are employed to prevent interfering waves from reaching the receiver unit, then the reliability of the sensor system against disturbances is improved, but the manufacturing costs increase
Solution Approach 1:
The patent applies this principle by using the interfering waves themselves as the measurement object. Instead of trying to block or eliminate the interference, the system employs additional receiver units to detect the interfering waves and uses signal processing to separate and utilize them as useful information about the scattering object, thereby converting a harmful factor into a beneficial measurement signal
Solution Approach 2:
The patent extracts the interference detection function from the traditional shielding approach and integrates it into the signal processing domain. By separating the interfering wave signals from the useful signals through mathematical processing rather than physical isolation, the system eliminates the need for expensive shielding materials and their associated manufacturing costs
3Device complexity
If conventional sensor systems are used without interference detection, then the device complexity is reduced, but the measurement precision deteriorates in the presence of interfering waves
Solution Approach 1:
The patent applies segmentation by dividing the received signals into distinct components: useful reflected waves and interfering waves. By using additional receiver units to specifically detect interfering waves and employing signal processing techniques to separate these components, the system achieves precise measurement even in complex electromagnetic environments without requiring overly complex hardware modifications
Solution Approach 2:
The patent implements feedback by using the information from interfering wave detection to correct and improve the measurement of the useful signals. The system continuously monitors the electromagnetic environment, identifies interference patterns, and applies corrective processing to maintain measurement precision, creating a closed-loop system that adapts to changing conditions
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 provides reliable results by correcting sensor signals for interfering waves, reducing manufacturing costs, and allowing flexible adaptation to different environments with varying sources of interference.
Implementation Method 1
at least one transmitter unit configured to emit waves, at least one receiver unit configured to receive waves
Implementation Method 2
at least one interference detection unit configured to detect interfering waves
Data Source
AI summary
A wave-based sensor system includes at least one transmitter unit configured to emit waves. The wave-based sensor system further includes at least one receiver unit configured to receive waves and to generate at least one sensor signal corresponding to the received waves. The wave-based sensor system further includes at least one interference detection unit configured to detect interfering waves and to generate at least one interference sensor signal corresponding to the detected interfering waves. The wave-based sensor system further includes a signal processing circuit connected with the at least one receiver unit and the at least one interference detection unit. The signal processing circuit is configured to correct the at least one sensor signal based on the at least one interference sensor signal, thereby obtaining at least one corrected sensor signal. Further, a sensor signal correction method of correcting at least one sensor signal is described.