Sensing Module Crosstalk Elimination via Dual-Sensor Distance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sensing modules face challenges in accurately eliminating crosstalk, especially in non-hole designs for electronic devices, where traditional methods are not effective and incur high calibration costs, leading to inaccurate sensing results.
Innovation Solution
A sensing module comprising a first sensor and a second sensor, both positioned at different distances from the light source, generating signals with distinct crosstalk components, which are combined using an arithmetic unit to eliminate crosstalk, resulting in an output signal that accurately reflects the object's presence without crosstalk interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional crosstalk reduction methods are used, then some crosstalk compensation is achieved, but measurement precision remains low and calibration costs are high
Solution Approach 1:
The patent divides the sensing function into multiple sensors positioned at different distances from the light source. Each sensor captures light signals with different crosstalk characteristics, allowing the system to segment and separately analyze the useful signal from the crosstalk component through mathematical processing.
Solution Approach 2:
The patent changes the spatial parameter (distance from light source) of multiple sensors to create different crosstalk conditions. By varying this parameter, the system obtains multiple equations with different coefficients, enabling mathematical elimination of the crosstalk component and achieving high-precision measurement without complex calibration.
2Measurement precision
If a hole is drilled in the case above the sensor, then sensing accuracy is improved, but artistic design is compromised
Solution Approach 1:
The patent converts the harmful effect of the case reflecting light (which causes crosstalk) into a beneficial measurement signal. By positioning sensors at different distances and using mathematical processing, the system eliminates the crosstalk component while retaining the useful reflected light information, thereby maintaining both artistic design and sensing accuracy.
3Measurement precision
If multiple sensors at different distances are used, then crosstalk elimination accuracy is improved, but device complexity increases
Solution Approach 1:
The patent makes each sensor serve multiple functions: detecting the useful reflected light signal and simultaneously capturing the crosstalk component. This multi-functionality allows the system to obtain multiple measurement equations from which both the target object information and crosstalk characteristics can be extracted and eliminated through mathematical processing.
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 enhances sensing accuracy by effectively isolating the reflection component from the crosstalk component, reducing calibration costs and improving the reliability of sensing results in artistic design applications.
Implementation Method 1
the sensor emits light and senses light reflected by a testing object
Implementation Method 2
a first sensor, for sensing a light signal to generate a first sensing signal
Data Source
AI summary
A sensing module includes a first sensor, for sensing a light signal to generate a first sensing signal including a first crosstalk component related to a crosstalk signal in the light signal; a second sensor, for sensing the light signal to generate a second sensing signal including a second crosstalk component related to the crosstalk signal; and an arithmetic unit, for combining the first sensing signal and the second sensing signal according to a ratio between the first crosstalk component and the second crosstalk component, to generate an output signal; wherein a distance between the first sensor and a light source generating the light signal is different from a distance between the second sensor and the light source.