Ultrasonic Sonar Abnormality Detection Through Reflection Features
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Solution Overview
Problem
Existing sonar systems face reduced detection accuracy due to factors such as temperature changes from exhaust gas and adherents, which are not effectively addressed by current technologies.
Innovation Solution
An abnormality determination apparatus and method that analyze differences in features like Time of Flight (TOF) and wave height of ultrasonic signals to identify and differentiate between normal and abnormal sonar apparatuses, thereby determining the cause of reduced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensors and temperature-based correction methods are used to improve detection accuracy, then the influence of temperature features is reduced, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces the temperature sensor-based correction system with an acoustic signal-based abnormality detection system. Instead of using temperature sensors to measure and correct for temperature effects, the system uses analysis of acoustic signals (reflection waves) to detect abnormalities in sonar apparatus, thereby eliminating the need for additional temperature sensing hardware while maintaining detection accuracy.
Solution Approach 2:
The patent uses reflection waves (acoustic copies) of ultrasonic signals to indirectly detect the state of sonar apparatus. By analyzing the characteristics of these reflected acoustic signals, the system can infer abnormalities without directly measuring physical parameters like temperature, thus avoiding the need for additional temperature sensors and complex correction algorithms.
2Measurement precision
If temperature sensors are added to correct for temperature features, then detection accuracy improves, but manufacturing cost increases
Solution Approach 1:
The patent substitutes the temperature sensor hardware with an acoustic signal processing system. By using reflection wave analysis to detect sonar apparatus abnormalities, the system eliminates the need for temperature sensors and their associated correction mechanisms, thereby reducing manufacturing costs while maintaining the ability to ensure detection accuracy.
Solution Approach 2:
The sonar apparatus essentially performs self-diagnostics by analyzing its own transmitted ultrasonic signals and their reflections. The system uses the acoustic signals themselves to detect abnormalities in the sonar apparatus, eliminating the need for separate temperature sensing and correction subsystems, thus reducing manufacturing complexity and cost.
3Area of stationary object
If multiple sonar apparatus are used to cover all areas, then detection coverage improves, but the difficulty of detecting and measuring abnormalities increases
Solution Approach 1:
The patent merges the detection functions of multiple sonar apparatus into a unified abnormality detection system. By analyzing reflection waves from multiple sonar units simultaneously and comparing their characteristics, the system can detect abnormalities in individual apparatus while maintaining comprehensive detection coverage. The unified system processes signals from all sonar apparatus together, making abnormality detection more manageable despite the increased number of devices.
Solution Approach 2:
The patent applies consistent abnormality detection methods across all sonar apparatus. By using the same reflection wave analysis technique for each sonar unit, the system maintains uniform detection capabilities across different areas while simplifying the overall abnormality detection process. This homogeneous approach allows standardized processing of signals from multiple apparatus, reducing the complexity of detecting and measuring abnormalities across the entire system.
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
Enhances detection accuracy by identifying and excluding abnormal sonar apparatuses, simplifying the system structure, and reducing manufacturing costs without the need for high-accuracy temperature sensors.
Implementation Method 1
A sonar apparatus can detect the presence of a target object by transmitting ultrasonic waves and receiving the ultrasonic waves reflected by the target object. Additionally, the sonar apparatus can measure the distance to the target object by calculating the time difference between the transmission and reception of the ultrasonic waves.
Implementation Method 2
the sonar apparatus can measure the distance to the target object by calculating the time difference between the transmission and reception of the ultrasonic waves
Implementation Method 3
an abnormality determination apparatus includes: a reception circuitry which, in operation, receives a feature of a reflection wave corresponding to an ultrasonic signal transmitted by each sonar apparatus; and an abnormality determination circuitry which, in operation, determines an abnormality of each sonar apparatus based on a difference in the feature
Data Source
AI summary
An abnormality determination apparatus includes: a reception circuitry which, in operation, receives a feature of a reflection wave corresponding to an ultrasonic signal transmitted by each sonar apparatus; and an abnormality determination circuitry which, in operation, determines an abnormality of each sonar apparatus based on a difference in the feature.