Sonar Emitter Buoyancy Control for Object Detection
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Solution Overview
Problem
Existing sonar systems face limitations in detecting objects without an active signature in water due to interference from thermocline layers and disruptive signal emissions from evaluation platforms, leading to incomplete detection and reduced accuracy.
Innovation Solution
Deploying multiple sonar emitters that emit sound signals at different frequencies, allowing for position determination using direct and reflected signal strength and path analysis, with adjustable sinking or hovering capabilities to enhance localization accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sonar buoys are deployed using projectiles or linked to evaluation platforms, then detection capability is improved, but thermocline layers cannot be overcome and detection is limited
Solution Approach 1:
The sonar emitter is designed with adjustable buoyancy characteristics that allow it to dynamically adapt its vertical movement behavior. By controlling the sinking rate (0.01-10 m/s) or achieving neutral buoyancy, the emitter can hover at different depths and cross thermocline layers effectively, overcoming the limitation of fixed deployment methods
Solution Approach 2:
The system changes the physical parameters of the sonar emitter by adjusting its specific weight through buoyancy control mechanisms. This allows the emitter to transition between sinking and hovering states, enabling it to navigate through different water layers including thermoclines, thereby improving adaptability across varying environmental conditions
2Measurement precision
If evaluation platforms emit signals for detection, then object localization is enabled, but the platform emits inherently disruptive signals
Solution Approach 1:
The invention separates the signal emission function from the evaluation platform. The sonar emitter is deployed independently as a separate component that carries its own signal generation capability, extracting the harmful signal emission task from the evaluation platform and placing it in the emitter itself
Solution Approach 2:
The sonar emitter acts as an intermediary between the evaluation platform and the target objects. It receives deployment commands from the platform but independently manages signal emission and data collection, mediating the interaction while reducing direct signal disruption to the platform
3Measurement precision
If multiple sonar emitters are deployed with different frequencies, then position determination accuracy is improved, but system complexity increases
Solution Approach 1:
The system divides the detection task into multiple independent sonar emitter units, each operating at different frequencies. This segmentation allows parallel signal emission and reception, improving position determination accuracy through spatial and spectral diversity while keeping each individual unit relatively simple
Solution Approach 2:
Each sonar emitter is designed as a universal module capable of independent operation with standardized signal transmission and reception functions. The multi-frequency capability is integrated into each unit, allowing them to perform multiple detection functions simultaneously without requiring complex centralized control
4Speed
If sonar emitters sink quickly to reach deeper waters, then deployment speed is improved, but localization accuracy decreases
Solution Approach 1:
The sonar emitter incorporates dynamic buoyancy control that allows adjustment of sinking rate between 0.01-10 m/s. This dynamic control enables the system to optimize the balance between deployment speed and localization accuracy by selecting appropriate sinking rates based on operational requirements
Solution Approach 2:
The emitter can alternate between sinking phases and hovering phases, creating a periodic movement pattern. During sinking, it covers vertical distance quickly; during hovering, it maintains position for accurate localization measurements, combining speed and precision in a cyclical operational mode
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
Enables quick and accurate detection of objects without active signatures by improving signal reception and localization, particularly through the use of multiple emitters and adjustable sinking or hovering mechanisms, thereby overcoming thermocline layer interference and reducing signal disruption.
Implementation Method 1
several sonar emitters are positioned, which emit sonar sound
Implementation Method 2
precalibrate the weight of the sonar emitter to allow it to sink slowly or float freely below the surface
Implementation Method 3
The free floating effect can occur, for example, due to changes in the density of the water at thermal layers
Implementation Method 4
the position of the object is determined in a detector system from the directly received signals and the signals reflected by the object to be detected. The position is determined taking into account the received signal strength and the attenuation and signal path that can be derived from this
Implementation Method 5
sound reflections from objects. The reception angle to the sonar emitter is known from the directly received sound; the position of a reflecting object can be calculated from the received reflection
Data Source
Figure 1
AI summary
By extending the function of the sonar, objects with no active signature can be detected using a passive sonar. The sonar emitters used for this purpose are placed into position either using a suitable carrier or manually and emit sonar sound whilst sinking or floating slowing in liquid. The detector receives in a system the signals received directly from the sonar emitter and the signals reflected by the object and determines therefrom the position of the object to be detected. Improved accuracy can be achieved by using a plurality of sonar emitters in any desired arrangement.