Ranging Device Waveform Integration for Noise-Reduced Detection
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Solution Overview
Problem
The detection sensitivity of reflected light in existing ranging devices is low due to noise detected in the light receiving unit.
Innovation Solution
A ranging device that includes a light emitting unit, a light detection unit, a background light calculation unit, a subject bearing-azimuth selection unit, a coefficient calculation unit, a ranging waveform generation unit, a coefficient-multiplied waveform generation unit, an integrated waveform generation unit, and a measurement unit, which calculates multiplier coefficients to reduce noise by integrating coefficient-multiplied waveform data for the subject and peripheral bearing regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light detection is performed using a light receiving unit, then distance measurement capability is achieved, but detection sensitivity is low due to noise
Solution Approach 1:
The patent combines waveform data from multiple bearing regions (subject bearing region and peripheral bearing regions) into integrated waveform data. By merging these multiple data sources and applying coefficient multiplication, the system enhances the signal-to-noise ratio, thereby improving detection sensitivity while suppressing noise interference.
Solution Approach 2:
The patent introduces an intermediary processing mechanism where coefficient multiplication is applied to waveform data before integration. This intermediary step allows selective enhancement or suppression of specific bearing region contributions, enabling noise reduction while preserving useful signal components during the integration process.
2Measurement precision
If waveform data from multiple bearing regions is integrated, then detection sensitivity improves, but device complexity increases
Solution Approach 1:
The patent segments the light receiving field into multiple bearing regions (subject bearing region and peripheral bearing regions), allowing independent processing and coefficient multiplication for each region before integration. This segmentation enables targeted noise suppression while maintaining manageable processing complexity through structured, region-specific operations.
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
The device improves the detection sensitivity of reflected light by reducing noise in integrated waveform data, enhancing the accuracy of distance measurement.
Implementation Method 1
a ranging device that emits light and measures a distance to an object that reflects the light
Data Source
AI summary
In a ranging device, a background light calculation unit calculates, for each of a plurality of bearing regions, a background light level parameter related to a level of background light arriving from the bearing region. A coefficient calculation unit calculates multiplier coefficients for the bearing regions such that the multiplier coefficient for each peripheral bearing region around a subject bearing region is negatively correlated with a difference in the background light level parameter between the subject bearing region and the peripheral bearing region. A coefficient-multiplied waveform generation unit generates, for each of the subject bearing region and the peripheral bearing regions, coefficient-multiplied waveform data acquired by multiplying ranging waveform data by the corresponding multiplier coefficient. An integrated waveform generation unit generates integrated waveform data by integrating the coefficient-multiplied waveform data for the subject bearing region and the peripheral bearing regions.