Event-Driven Vision Sensor 3D Position Detection
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Solution Overview
Problem
Existing event-driven vision sensors lack effective utilization methods when combined with other devices, particularly in position detection applications.
Innovation Solution
A position detection system that incorporates an event-driven vision sensor with a microlens array, where the sensor array generates event signals upon detecting changes in light intensity, and a terminal device receives these signals to detect three-dimensional positions using the microlenses to guide light to specific regions of the sensor array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an event-driven vision sensor is used, then power consumption is reduced and operating speed is increased, but position detection capability is insufficient
Solution Approach 1:
The patent introduces a microlens array to add an optical dimension to the event-driven sensor system. By focusing light from different three-dimensional positions onto specific sensor regions through the microlens array, the system gains the ability to detect depth information and achieve three-dimensional position detection while maintaining the high-speed operation of the event-driven sensor.
2Measurement precision
If a frame-type vision sensor is used, then position detection capability is achieved, but power consumption is high and operating speed is limited
Solution Approach 1:
The patent segments the sensor array into multiple regions, each corresponding to a specific microlens. This segmentation allows the system to process only the event signals from relevant regions rather than scanning the entire sensor array, thereby reducing power consumption while maintaining position detection capability.
3Measurement precision
If additional devices like infrared irradiation or auxiliary light sources are added, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The microlens array serves multiple functions: it focuses light from different angles onto specific sensor regions for three-dimensional position detection, and it works with the existing event-driven sensor without requiring additional light sources. This multi-functionality achieves detection accuracy improvement while avoiding the complexity of adding separate infrared irradiation or auxiliary light source systems.
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
Enables accurate and high-frame-rate detection of three-dimensional light intensity changes and improves prediction accuracy for object position, allowing for efficient movement estimation and space-saving implementation without additional configurations like infrared irradiation or auxiliary light sources.
Implementation Method 1
a microlens array that includes at least first and second microlenses for guiding the light to first and second regions of the sensor array, respectively
Implementation Method 2
an event-driven vision sensor that includes a sensor array including sensors each generating an event signal when a change in intensity of incident light is detected
Data Source
AI summary
A position detection system includes an event-driven vision sensor that includes a sensor array including sensors each generating an event signal when a change in the intensity of incident light is detected, a microlens array that includes at least first and second microlenses for guiding the light to first and second regions of the sensor array, respectively, and a terminal device that has a reception unit for receiving the event signal from the vision sensor and a position detection unit for detecting the three-dimensional position of the change in the intensity of light, from the event signal generated by each sensor in the first region and the second region.