Event Sensor Resolution Switching for Vehicle State Detection
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Solution Overview
Problem
Existing event detection sensors on mobile bodies, such as vehicles, face challenges in accurately detecting events like pedestrians or other vehicles regardless of the vehicle's traveling state, as their performance is affected by varying conditions like congestion, highway travel, and speed changes.
Innovation Solution
An imaging system with an event detection sensor and a control unit that dynamically switches the sensor's resolution based on the vehicle's traveling state, using a combination of asynchronous and synchronous imaging technologies to enhance event detection accuracy and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the event detection sensor operates at high resolution continuously, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The sensor resolution is made dynamically adjustable based on vehicle traveling state. The control unit switches between first resolution (lower power consumption) and second resolution (higher detection accuracy) according to whether the vehicle is stationary or moving, resolving the contradiction between continuous high-resolution operation and power consumption
Solution Approach 2:
The resolution parameter of the event detection sensor is changed based on traveling state conditions. When the vehicle is stationary, a first resolution is used; when moving, a second resolution is used. This parameter adaptation allows the system to optimize the balance between detection accuracy and power consumption according to operational requirements
2Use of energy by moving object
If the sensor resolution is switched based on traveling state, then power consumption is reduced, but detection accuracy may deteriorate in certain conditions
Solution Approach 1:
The control unit receives feedback about the vehicle's traveling state (stationary or moving) and adjusts the sensor resolution accordingly. This feedback mechanism ensures that the resolution is optimized for current conditions - using lower resolution when stationary to save power, and higher resolution when moving to maintain detection accuracy
Solution Approach 2:
The system dynamically adapts sensor resolution to match the actual operational context. By making resolution adjustable based on traveling state, the system avoids the pitfalls of fixed high-resolution operation while ensuring adequate detection performance is maintained when the vehicle is in motion
3Speed
If asynchronous imaging is used for event detection, then real-time detection capability is improved, but the system cannot capture static scenes effectively
Solution Approach 1:
The system merges asynchronous event detection mode with synchronous image capture mode. The event detection sensor operates asynchronously to detect changes in real-time, while the imaging sensor captures synchronous frames. This combination allows the system to leverage the real-time responsiveness of asynchronous detection while maintaining the ability to capture complete static scenes through synchronous imaging
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 ensures accurate event detection across different traveling states by adjusting resolution according to vehicle speed, relative speed, and event frequency, thereby improving detection accuracy and reducing power consumption.
Implementation Method 1
a pixel array unit including a plurality of pixels; each pixel includes a photoelectric conversion unit
Data Source
AI summary
An imaging device of the present disclosure includes an event detection sensor that detects an event, and a control unit that controls the event detection sensor. Then, the control unit switches a resolution of the event detection sensor depending on a traveling state of a mobile body. Furthermore, the imaging system of the present disclosure includes an event detection sensor that detects an event; a control unit that switches a resolution of the event detection sensor depending on a traveling state of a mobile body; and an object recognition unit that performs event recognition on the basis of an event signal output from the event detection sensor.