Solid-State Imaging Device Dynamic Acceleration Range Control
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Solution Overview
Problem
Conventional solid-state imaging devices have a fixed measurable range for acceleration, which limits their ability to accurately measure acceleration when the device operates outside this range.
Innovation Solution
A solid-state imaging device with an inertial measurement section that dynamically adjusts its measurable range of acceleration based on the speed of the target object, expanding the range when the speed exceeds a threshold and narrowing it when the speed falls below another threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the measurable range of acceleration is set in advance (fixed), then the device structure is simple, but the measurement precision deteriorates when operating outside the predetermined range
Solution Approach 1:
The patent applies the dynamics principle by making the measurable range of the inertial measurement section adjustable rather than fixed. The control unit dynamically changes the measurable range based on the detected speed of the target object, allowing the system to adapt to different operating conditions and maintain measurement precision across a wide range of accelerations.
Solution Approach 2:
The patent implements parameter changes by modifying the measurable range parameter of the inertial measurement section according to the speed of the target object. When the speed exceeds a first threshold, the measurable range is expanded; when it falls below a second threshold, the measurable range is narrowed. This dynamic parameter adjustment resolves the contradiction between measurement precision and device complexity.
2Adaptability or versatility
If the measurable range is expanded to cover higher speeds, then the adaptability improves, but the sensitivity to acceleration measurement deteriorates
Solution Approach 1:
The system dynamically adjusts the measurable range based on real-time speed detection. When the target object's speed is high, the measurable range is expanded to accommodate large accelerations. When the speed is low, the measurable range is narrowed to maintain high sensitivity for small accelerations. This dynamic adjustment resolves the trade-off between adaptability and sensitivity.
Solution Approach 2:
The patent changes the measurable range parameter dynamically based on the speed of the target object. By establishing a relationship between speed and measurable range, the system can adapt to different operating conditions while maintaining appropriate sensitivity. This parameter change strategy allows the system to achieve both wide adaptability and high measurement precision.
3Measurement precision
If the inertial measurement section continuously monitors speed to adjust measurable range, then the measurement precision improves, but the use of energy increases
Solution Approach 1:
The system changes the measurable range parameter based on the speed of the target object, which is already being detected for other purposes. By utilizing the existing speed detection function to trigger measurable range adjustments, the patent avoids adding separate continuous monitoring mechanisms, thereby minimizing additional energy consumption while maintaining measurement precision.
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 measurement of acceleration across a wider range of speeds, preventing deviations from the measurable range and ensuring high sensitivity in measuring acceleration and angular velocity.
Implementation Method 1
an imaging section that photoelectrically converts incident light into a charge amount according to a light amount and images a target object
Data Source
AI summary
Provided are a solid-state imaging device capable of dynamically changing a measurable range of acceleration to accurately measure acceleration, and a method of controlling the solid-state imaging device.A solid-state imaging device according to the present disclosure is a solid-state imaging device disposed on a mobile body, the solid-state imaging device including: an imaging section that photoelectrically converts incident light into a charge amount according to a light amount and images a target object; a motion detecting section that calculates a speed of the target object on the basis of a plurality of images imaged by the imaging section; and an inertial measurement section that detects an acceleration or an angular velocity of the mobile body and changes a measurable range of the acceleration or the angular velocity of the mobile body according to the speed of the target object.