Television Camera Distance Measurement Using LED and Photodetector
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Solution Overview
Problem
Existing distance measurement technologies for autonomous driving and robotics lack the necessary accuracy for reliable navigation.
Innovation Solution
A method utilizing an LED light emitting element and a light intensity measuring element integrated with a television camera system, where the position of the subject and the image element are used to calculate distance based on the time difference between light emission and reflection measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing distance measurement technologies are used for autonomous driving and robotics, then the system can operate, but the measurement accuracy is insufficient for reliable navigation
Solution Approach 1:
The patent combines image analysis technology with time-of-flight distance measurement technology into a single integrated system. The television camera captures images for subject identification and positioning, while LED light emitting elements emit light and photodetectors measure reflected light timing. This merging of multiple measurement approaches enables both accurate distance measurement and reliable navigation by cross-validating results from different sensing modalities.
2Measurement precision
If light is emitted to measure distance, then distance measurement is enabled, but the light intensity must be sufficiently strong to ensure accurate measurement
Solution Approach 1:
The patent employs multiple LED light emitting elements arranged in specific positions corresponding to different regions of the television camera sensor array. Each LED emits light toward specific areas, and the system selectively activates only the LEDs needed for measuring distances to currently detected subjects. This local quality approach ensures sufficient light intensity for accurate measurement while minimizing overall energy consumption by avoiding unnecessary illumination of unused fields of view.
3Measurement precision
If the position of the subject and image element are used for distance calculation, then accurate positioning is achieved, but the system complexity increases
Solution Approach 1:
The television camera serves multiple functions: it captures images for subject identification, determines subject position and size, and provides spatial mapping for distance measurement. The same image processing algorithms used for object recognition are leveraged to extract positional information for the distance calculation formula. This multi-functionality reduces overall system complexity by eliminating the need for separate positioning sensors while maintaining accurate position measurement.
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 enables accurate distance measurement by focusing the strongest light on the subject and measuring the reflected light, thereby improving navigation precision in autonomous systems.
Implementation Method 1
an LED light emitting element unit (10) at a position (9) of an image element of a subject subjected to image analysis on the subject (4) photographed by the image analysis television camera (1)
Implementation Method 2
the subject (4) is irradiated with light, and the reflected light from the subject (4) is measured
Implementation Method 3
the reflected light from the subject (4) is measured by the light intensity measuring element (13) at the position (9) of the image element of the subject subjected to image analysis through the optical lens
Implementation Method 4
focusing the strongest light on the subject
Implementation Method 5
the distance is calculated based on a time at which the reflected light is measured
Data Source
AI summary
Provided is an environment in which balance information can be easily confirmed when An LED light emitting element unit that controls light emission for each LED light emitting element that is similar to an image element of a television camera is required. A luminous intensity measuring element unit to be controlled and measured is necessary for each luminous intensity measuring element which is similar to an image element of a television camera. The present invention relates to an electronic device that can be manufactured by a current electronic device manufacturing technology.