Range Finding Device Control Circuit Time of Flight
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Solution Overview
Problem
Conventional range finding devices based on reflected light detection face challenges in obtaining accurate distance measurements due to insufficient reflected light intensity, leading to inefficient image recording and difficulty in identifying desired images, especially when multiple measurements are performed at the same or nearby positions.
Innovation Solution
A range finding device equipped with an image sensor and a measurement circuit that records image data and measurement results only when successful distance measurements are obtained, ensuring that images are recorded efficiently and accurately, while avoiding unnecessary recordings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous image recording is performed regardless of measurement success, then no useful images are missed, but storage space is wasted and image retrieval becomes difficult
Solution Approach 1:
The control circuit checks whether ranging measurement has been successfully completed before executing image recording. This preliminary check prevents unnecessary image recording when ranging fails, avoiding waste of storage space while ensuring images are recorded when ranging succeeds.
2Reliability
If multiple ranging measurements are performed at the same position to confirm accuracy, then measurement reliability improves, but image retrieval becomes difficult due to redundant recordings
Solution Approach 1:
The control circuit uses ranging measurement results as feedback to control image recording. When ranging measurement is successfully completed, the control circuit records the image; when ranging fails, recording is suppressed. This feedback mechanism ensures that only meaningful images with associated ranging data are stored, improving retrieval efficiency.
3Loss of substance
If image recording is suppressed when ranging fails, then storage space is conserved, but useful images may be missed
Solution Approach 1:
The system uses its own ranging measurement capability to determine whether image recording should be performed. The control circuit automatically judges whether to record images based on the success or failure of ranging measurement, eliminating the need for external judgment and ensuring consistent decision-making.
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 the efficiency of image recording by ensuring that only successful measurements are recorded, reducing unnecessary data storage and simplifying the process of finding relevant images, thereby improving user experience and data management.
Implementation Method 1
a measurement circuit that measures a distance to a predetermined position within a field of view of the image sensor based on time of flight of light
Data Source
AI summary
A range finding device comprising an image sensor and a measurement circuit that measures a distance to a predetermined position within a field of view of the image sensor based on time of flight of light, is disclosed. The range finding device records image data that has been obtained using the image sensor, as well as a measurement result from the measurement circuit, into a recording medium in association with each other. The range finding device executes the recording under a condition that the measurement performed by the measurement circuit has been successful.