Optical Distance Detection Light Spot Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical distance detection devices fail to accurately calculate object distance when the object's surface is not fully illuminated, leading to measurement errors due to incomplete light spot images.
Innovation Solution
An optical distance detection device that compensates for light spot position variations based on size and symmetry of the energy curve, using a sensing module and calculation module to generate and process images, and adjust the light spot position accordingly for accurate distance calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection device uses conventional light spot position detection without compensation, then the device complexity is low, but the measurement precision deteriorates when the object surface is not fully illuminated
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing compensation values in a lookup table before actual measurement. The compensation values are prepared in advance based on expected light spot position deviations, allowing the system to quickly retrieve and apply appropriate compensation without complex real-time calculations, thus improving measurement precision while maintaining relatively simple device complexity
Solution Approach 2:
The patent introduces an intermediary compensation mechanism between the raw light spot position detection and the final distance calculation. The compensation value acts as a mediator that corrects the detected position based on the relationship between object distance and light spot position deviation, enabling accurate distance measurement even when the light spot image is incomplete
2Reliability
If the detection device requires complete light spot image for accurate measurement, then the measurement precision is high, but the reliability deteriorates when illumination is insufficient
Solution Approach 1:
The patent implements feedback by using the detected light spot position to determine the appropriate compensation value from the lookup table, then applying this compensation to correct the position measurement. This feedback loop allows the system to adapt to varying illumination conditions and maintain reliable distance detection even when the light spot image is incomplete or asymmetric
Solution Approach 2:
The patent changes the parameter approach by shifting from requiring complete light spot image parameters to using compensatable position parameters. By introducing compensation values that account for expected position deviations based on object distance, the system maintains measurement reliability across different illumination scenarios without demanding perfect image quality
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
Enhances the accuracy of distance detection by compensating for light spot position deviations, ensuring correct distance calculation even with incomplete light spot images, thereby improving measurement reliability.
Implementation Method 1
a light source (20) for projecting light
Implementation Method 2
a detection device (10) for receiving a reflected light from the surface of the object (30)
Data Source
AI summary
There is provided an optical distance detection system which includes a light source and a detection device. The light source is configured to illuminate a surface of an object. The detection device is configured to receive a reflected light from the surface of the object and to output a distance of the object according to the reflected light. The detection device includes a sensing module and a calculation module. The sensing module is configured to receive the reflected light to accordingly generate an image. The calculation module is for outputting the distance according to a light spot position and a light spot size of the reflected light forming on the image.