Underwater Detection Beam Interference Suppression
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Solution Overview
Problem
Underwater detection devices face challenges in reducing the cycle time for transmitting and receiving multiple beams while minimizing false images caused by mutual interference between beams, with existing methods either lengthening the cycle or being limited to shallow water due to high frequency requirements.
Innovation Solution
An underwater detection device and method that sets a combination of beams to be transmitted and received simultaneously based on conditions such as symmetrical directions, same tilt angles, or excluding directly-downward beams to minimize interference, using a beam setting module and transmission/reception controlling module to optimize beam alignment and timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple beams are transmitted and received simultaneously to widen detection range, then productivity is improved, but false images appear due to mutual interference between beams
Solution Approach 1:
The patent segments the beam transmission process by dividing multiple beams into different groups that are transmitted at different timings. This segmentation reduces mutual interference between beams while maintaining wide detection coverage, as each group of beams is transmitted sequentially rather than simultaneously, preventing the false images caused by beam interference.
Solution Approach 2:
The patent implements periodic action by transmitting different groups of beams in alternating time periods. The transmission/reception controlling module switches between different beam groups in a periodic manner, allowing each group to be transmitted without interference from other groups, thus eliminating false images while maintaining continuous detection coverage.
2Reliability
If beams are transmitted at different timings to suppress mutual interference, then reliability is improved, but the cycle to finish transmissions and receptions becomes longer
Solution Approach 1:
The patent segments the total set of beams into multiple groups that can be transmitted in parallel at different timings. By segmenting beams into groups based on their interference characteristics, the system transmits multiple groups simultaneously without mutual interference, reducing the overall transmission cycle compared to sequential transmission of all beams one by one.
Solution Approach 2:
The patent merges multiple beam groups into simultaneous transmission operations. Different groups of beams are transmitted and received at the same time without interfering with each other, combining the productivity benefits of simultaneous transmission with the reliability benefits of interference suppression.
3Productivity
If beams are transmitted at different frequencies to enable simultaneous reception, then productivity is improved, but the device is limited to shallow water due to high frequency band requirements
Solution Approach 1:
The patent changes the parameter used for beam differentiation from frequency to transmission timing. Instead of using different frequencies (which are limited to shallow water), the system uses different time slots for transmitting different beam groups, allowing the use of lower frequencies suitable for deep water applications while maintaining simultaneous transmission capability.
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 effectively shortens the cycle time for transmitting and receiving all beams while suppressing false images due to mutual interference, allowing for more accurate underwater condition detection without the limitations of shallow water operation.
Implementation Method 1
transmit a sound wave underwater to detect an underwater condition based on a reflection wave of the transmitted sound wave
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
An underwater detection device (10) is provided, which includes a beam setting module (15a) and a transmission/reception controlling module (15b). The beam setting module (15a) sets, among a plurality of beams (2, 2a, 2b, 2c, 2d, 2e, 2f, 2g) set for underwater detection, a combination of beams (2, 2b, 2c, 2d, 2e, 2f, 2g) satisfying a condition for suppressing an influence of mutual interference between the beams. The transmission/reception controlling module (15b) simultaneously transmits and receives the combination of beams (2, 2b, 2c, 2d, 2e, 2f, 2g).