Optical Timing Detection Layout for Accurate Pulse Distance Sensing
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Solution Overview
Problem
Existing optical detection devices require multiple light emitting and receiving elements, leading to increased component costs and variations in emission and reception timing due to manufacturing and environmental factors, necessitating accurate correction of these variations.
Innovation Solution
An optical detection device with a configuration that includes multiple light emitting elements, light propagation members, first and second light receiving elements, and light guide members, utilizing a substrate structure to support laminates and electrodes, and optical switches to sequentially introduce light pulse signals, allowing for accurate detection of light emission timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple light receiving elements are provided to detect light emission timing, then light emission timing detection accuracy is improved, but component costs and device complexity increase
Solution Approach 1:
The patent segments the light receiving function by providing separate first light receiving elements for detecting light emission timing and second light receiving elements for detecting reflection light signals. This segmentation allows each type of detection to be optimized independently, resolving the contradiction by dedicating specific elements to specific functions rather than requiring all elements to perform all functions.
Solution Approach 2:
The patent introduces light propagation members as intermediaries to guide light from light emitting elements to first light receiving elements for timing detection. This intermediary structure enables accurate timing detection without requiring the main second light receiving elements to also perform timing detection, thus reducing the burden on the primary detection elements.
2Area of stationary object
If multiple light emitting elements are provided for distance measurement, then measurement coverage is improved, but variations in emission timing due to manufacturing and environmental factors increase
Solution Approach 1:
The patent implements a feedback mechanism where first light receiving elements detect the actual light emission timing from multiple light emitting elements, and this detected timing information is used to correct timing variations. This feedback loop compensates for manufacturing and environmental variations, allowing multiple light emitting elements to be used for expanded coverage while maintaining timing consistency.
Solution Approach 2:
The patent performs preliminary timing detection using first light receiving elements before the actual distance measurement process. By detecting light emission timing in advance and using this information for correction, the system prepares for accurate measurement despite variations in light emitting element characteristics.
3Reliability
If multiple light receiving elements are provided for reflection light detection, then detection capability is improved, but variations in reception timing increase
Solution Approach 1:
The patent segments the light receiving function by providing separate first light receiving elements for detecting light emission timing and second light receiving elements for detecting reflection light signals. This segmentation allows each type of detection to be optimized independently, resolving the contradiction by dedicating specific elements to specific functions rather than requiring all elements to perform all functions.
4Measurement precision
If light propagation members are introduced for timing detection, then timing detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the light propagation function with the detection function by integrating light propagation members into the existing optical path structure. The light propagation members are combined with the light emitting elements and first light receiving elements to form an integrated timing detection subsystem, reducing overall device complexity while maintaining timing detection accuracy.
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 configuration reduces component costs and variability in timing, enabling precise distance measurement by correcting light emission and reception variations, thereby improving measurement accuracy.
Implementation Method 1
a plurality of light emitting elements 5 each of which emits a first light pulse signal, a plurality of light propagation members that propagate the first light pulse signals emitted from the plurality of light emitting elements, and a plurality of first light receiving elements that receive the first light pulse signals propagated through the plurality of light propagation members
Implementation Method 2
a plurality of second light receiving elements that receive reflection light pulse signals obtained by the first light pulse signals emitted from the plurality of light emitting elements being reflected on an object
Implementation Method 3
a plurality of light guide members that guide the first light pulse signals emitted from the plurality of light emitting elements to the plurality of light propagation members
Data Source
AI summary
[Object]Variations of light emitting elements and light receiving elements are accurately correctable.[Solving Means]An optical detection device includes a plurality of light emitting elements each of which emits a first light pulse signal, a plurality of light propagation members that propagate the first light pulse signals emitted from the plurality of light emitting elements, a plurality of first light receiving elements that receive the first light pulse signals propagated through the plurality of light propagation members, a plurality of second light receiving elements that receive reflection light pulse signals obtained by the first light pulse signals emitted from the plurality of light emitting elements being reflected on an object, and a plurality of light guide members that guide the first light pulse signals emitted from the plurality of light emitting elements to the plurality of light propagation members.