Ultrasonic Object Detection Through Correlation Signal Comparison
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing object detection apparatuses face challenges in improving the accuracy of code determination, specifically in distinguishing between reflected waves and interference, which affects the precision of object detection.
Innovation Solution
The apparatus employs a transmission signal generator that produces multiple frequency-modulated ultrasonic waves, a correlation signal generator to analyze the correlation between reference and reception signals, and a signal determiner that compares these signals to enhance code determination accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single correlation signal generator is used, then the device complexity is low, but the accuracy of code determination is insufficient
Solution Approach 1:
The patent divides the correlation signal generation function into multiple parallel generators, each responsible for a specific transmission signal type. This segmentation allows the system to compare correlation signals from different transmission patterns, thereby improving code determination accuracy while maintaining manageable device complexity through functional specialization.
2Adaptability or versatility
If multiple types of transmission signals are generated, then the adaptability of the detection system is improved, but the device complexity increases
Solution Approach 1:
The transmission signal generator is designed to produce multiple types of frequency-modulated transmission signals with different patterns. This multi-functionality enables the system to adapt to various detection scenarios and improve code determination accuracy by selecting appropriate signal types, while the universal design maintains relatively compact system architecture.
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 significantly improves the accuracy of distinguishing between reflected waves and interference, reducing errors in object detection and enhancing the precision of distance and type determination of objects.
Implementation Method 1
a transmitter configured to transmit a probe wave that is an ultrasonic wave having a frequency thereof modulated based on a frequency change mode of the transmission signal
Implementation Method 2
a correlation signal generator configured to generate a correlation signal indicating a correlation between a reference signal and a reception signal
Data Source
AI summary
An object detection apparatus includes a transmission signal generator, a correlation signal generator, and a signal determiner. The transmission signal generator can generate a plurality of types of transmission signals changing frequencies thereof over time, and outputs one of the plurality of types of transmission signals to a transmitter transmitting a probe wave having a frequency thereof modulated based on a frequency change mode of the transmission signal. The correlation signal generator generates a correlation signal indicating a correlation between a reference signal and a reception signal. A plurality of correlation signal generators are provided in correspondence with the plurality of types of transmission signals. The signal determiner performs a signal determination of determining, based on the correlation signal, whether a received wave has a frequency change mode corresponding to a frequency modulation mode of the probe wave, and performs the signal determination by comparing a plurality of correlation signals.