Object Detection Apparatus Sorted Distance Comparison
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Solution Overview
Problem
Existing object detection apparatuses face increased calculation loads as the number of stationary objects in the detection area grows, leading to erroneous detections and inefficient processing due to the need to compare current distances with all stored stationary object distances at each irradiation angle.
Innovation Solution
The apparatus compares the current distance initially with the shortest stationary object distance stored, stopping comparisons once a match is found, and includes a deletion process to remove outdated stationary object distances, reducing the number of comparisons and maintaining efficient processing even with increasing numbers of stationary objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the apparatus compares current distance with all stored stationary object distances for each irradiation angle, then detection accuracy is maintained, but calculation load increases significantly as the number of stationary objects increases
Solution Approach 1:
The patent segments the comparison process by introducing an ordered sequence of stationary object distances. Instead of comparing with all stationary object distances simultaneously, the system divides the comparison into a sequential process where distances are compared in order from shortest to longest, allowing early termination when a match is found. This segmentation reduces the effective number of comparisons needed while maintaining detection accuracy.
Solution Approach 2:
The patent applies preliminary action by pre-sorting and ordering the stationary object distances before comparison. The system prepares the stationary object distance data in advance in ascending order, so that during detection, the comparison can start from the shortest distance and proceed systematically. This preliminary organization enables the system to stop comparisons early when matches are found, reducing calculation load while maintaining reliability.
2Reliability
If the apparatus stores all measured distances as stationary object distances, then comprehensive object tracking is achieved, but memory usage and processing time increase
Solution Approach 1:
The patent applies preliminary action by pre-sorting stationary object distances in ascending order before they are used for comparison. This preliminary organization allows the system to efficiently manage stored distances and terminate comparisons early, reducing processing time while maintaining complete object tracking capability.
Solution Approach 2:
The patent introduces dynamics by making the comparison process adaptive based on the ordered structure. The system dynamically adjusts the number of comparisons performed by stopping early when matches are found, rather than performing a fixed number of comparisons with all stationary object distances. This dynamic approach reduces processing time while maintaining tracking completeness.
3Measurement precision
If the apparatus updates stationary object distances frequently to track new objects, then detection accuracy is maintained, but calculation load and processing complexity increase
Solution Approach 1:
The patent segments the distance measurement and comparison process into discrete, ordered steps. By maintaining stationary object distances in ascending order and comparing sequentially, the system can update and process new distance measurements without requiring complex reprocessing of all data, thereby maintaining measurement precision while reducing processing complexity.
Solution Approach 2:
The patent applies parameter changes by utilizing the ordered arrangement of stationary object distances as a key parameter. The system leverages the sorted order property to optimize the comparison process, changing the approach from exhaustive comparison to sequential comparison with early termination, thereby maintaining accuracy while reducing complexity.
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 significantly reduces the calculation load and prevents erroneous detections by focusing comparisons on the shortest stationary object distance and deleting outdated entries, ensuring efficient object detection regardless of the number of stationary objects in the area.
Implementation Method 1
reflected waves of electromagnetic waves irradiated from an irradiating unit
Data Source
AI summary
An object detection apparatus measures a distance to a detected object at each irradiation angle, based on reflected waves of electromagnetic waves irradiated from a laser light irradiating unit at each irradiation angle. The apparatus determines whether the measured distance remains unchanged for prescribed period of time, for each irradiation angle, and stores the determined distance in a storage unit as a stationary object distance in association with the irradiation angle. The apparatus compares the current measured distance and the stored distances, and determines whether a stationary object distance matching the current distance is present among the stored distances. The apparatus initially compares the shortest stationary object distance among the stored distances with the current distance, and upon determining that a stationary object distance matching the current distance is present, stops the comparison of the current distance and the stored distances that have not been compared with the current distance.