Object Detector Signal Priority Sorting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing object detection systems using time-of-flight (TOF) techniques often include unreliable distance information, making it difficult to accurately differentiate between objects to be detected and those not to be detected, such as road surfaces, which affects detection accuracy.
Innovation Solution
An object detector system that includes a transmission and reception unit, an acquisition unit, a sort processing unit, and an output control unit, where the sort processing unit sets priority based on the difference between signal levels and a threshold, and the output control unit outputs distance information in descending order of priority, ensuring that more reliable data is used for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a plurality of pieces of distance information are acquired by multiple sensors to improve detection coverage, then the quantity of detected objects increases, but the reliability of detection decreases due to inclusion of unreliable distance information from objects not to be detected
Solution Approach 1:
The patent changes the parameter of signal level threshold dynamically. It calculates the difference between signal levels of acquired distance information and a threshold value, then prioritizes distance information with larger differences. This parameter change allows the system to distinguish reliable distance information from unreliable information, resolving the contradiction between quantity and reliability.
2Device complexity
If all acquired distance information is processed equally to maintain simplicity, then the device complexity remains low, but the detection accuracy decreases due to noise from unreliable information
Solution Approach 1:
The patent introduces a priority parameter based on signal level differences without adding complex processing structures. By calculating the difference between each distance information's signal level and a threshold, then sorting by this difference, the system achieves both simplicity and accuracy. This resolves the contradiction by maintaining low device complexity while improving measurement precision through parameter-based differentiation.
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 approach improves detection accuracy by prioritizing distance information with larger signal level differences, effectively reducing noise and improving the reliability of detected objects, thereby enhancing the overall detection process.
Implementation Method 1
a time of flight (TOF) is used in a device for detecting an object as distance information indicating the distance to an object, the TOF being the time until a transmission wave such as an ultrasonic wave or a millimeter wave is reflected on the object and returned
Data Source
AI summary
An object detector includes: a transmission and reception unit that transmits a transmission wave and receives a reflection wave from an object; an acquisition unit that detects the reflection wave having a signal level above a threshold to acquire distance information indicating a distance from the transmission and reception unit to the object; a sort processing unit that sets a priority of the distance information to be higher as a difference between a signal level corresponding to the distance information and the threshold is larger when a plurality of pieces of the distance information are acquired in a predetermined period; and an output control unit that outputs the plurality of pieces of the distance information in descending order of the priority.