Distance Measuring Device Intensity Correction

The patent implements feedback by calculating the actual rise time and fall time of the received signal light waveform, comparing them against reference values, and using the detected variations to correct distance measurements. The system continuously monitors signal characteristics and adjusts measurements based on detected intensity variations, creating a closed-loop correction mechanism that compensates for photodiode response variations.

The patent changes the approach from using fixed reference timing values to dynamically calculating rise time and fall time parameters based on actual signal characteristics. By measuring the temporal parameters (rise time and fall time) of the received waveform and using these as correction factors, the system adapts to varying light intensities and background conditions, transforming static measurement into dynamic parameter-based correction.

The system performs self-correction by using its own measured signal characteristics (rise time and fall time) to identify and compensate for measurement errors. The photodetector system automatically calculates timing variations from the received waveform and applies corrections without requiring external calibration or additional reference measurements, making the system self-correcting and reducing overall system complexity.

The patent replaces complex hardware correction mechanisms with signal processing-based timing analysis. Instead of using additional optical components or mechanical adjustment systems to compensate for intensity variations, the system substitutes these with electronic waveform analysis and timing calculations, achieving correction through software/mathematical processing rather than physical modifications.

The signal processing unit performs multiple functions: it detects the received light waveform, calculates rise time and fall time parameters, determines timing variations, and applies corrections to distance measurements. By consolidating these diverse functions into a single multi-functional processing unit, the patent avoids the need for separate dedicated circuits for each function, thereby managing complexity while achieving comprehensive correction.

The patent merges the waveform detection, timing parameter calculation, variation detection, and correction application functions into an integrated signal processing approach. Rather than implementing separate hardware modules for each function, the system combines these operations into a unified processing sequence that operates on the received signal waveform, reducing overall system complexity through functional integration.