Flasher Fish Finder Multi-Frequency Detection
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Solution Overview
Problem
Conventional flasher-type fish finders cannot simultaneously indicate underwater detection results using three frequencies in an intuitive manner, leading to complex configurations, large size, and high costs due to the need for multiple ultrasonic transducers and associated circuits.
Innovation Solution
A flasher-type multi-frequency fish finder employing a wideband ultrasonic transducer and a control device with signal separation and light emission signal production to indicate underwater detection results using three frequencies through a display-rotating disk with concentric annular regions and LEDs, eliminating the need for separate transducers and circuits for each frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate ultrasonic transducers and circuits are used for each frequency, then detection accuracy for different frequencies is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs a single wideband ultrasonic transducer that can transmit and receive multiple frequency components (first, second, and third frequency components) simultaneously. This multi-functional transducer replaces what would traditionally require three separate transducers, thereby maintaining detection accuracy across different frequencies while significantly reducing device complexity and cost. The control device then separates the received signal into distinct frequency components for processing.
2Adaptability or versatility
If separate ultrasonic transducers and circuits are used for each frequency, then detection coverage for different frequencies is improved, but device size and cost increase
Solution Approach 1:
The wideband ultrasonic transducer serves multiple detection functions across different frequency ranges, enabling the device to detect fish schools at various depths and conditions using first, second, and third frequency components. This single transducer design maintains comprehensive detection coverage that would otherwise require multiple specialized transducers, thereby reducing the overall device size while preserving adaptability.
Solution Approach 2:
The patent combines the functions of multiple transducers and their associated circuits into a single integrated wideband transducer system. By merging these components, the device achieves the same multi-frequency detection capability in a more compact form factor, reducing both device size and cost while maintaining full detection coverage across all frequency bands.
3Device complexity
If a single wideband transducer is used, then device complexity and cost are reduced, but the ability to simultaneously indicate three frequencies intuitively becomes challenging
Solution Approach 1:
The control device segments the received ultrasonic signal into three distinct frequency components (first, second, and third frequency components) and processes them separately. This segmentation allows the system to maintain intuitive indication of each frequency's detection results through dedicated display regions, while the overall device complexity remains low because the segmentation is achieved through signal processing rather than hardware multiplication.
Solution Approach 2:
The patent uses concentric annular display regions arranged in a radial dimension to represent different frequency components. The first annular display region displays results from the first frequency component, the second annular display region displays results from the second frequency component, and the third annular display region displays results from the third frequency component. This spatial arrangement in the display dimension provides intuitive multi-frequency indication without increasing device complexity.
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 intuitive and simultaneous indication of underwater detection results using three frequencies, reducing device complexity, size, and cost while maintaining accurate detection of fish schools and water depth.
Implementation Method 1
a wideband ultrasonic transducer that transmits ultrasonic waves into water and receives reflected signals from that water
Implementation Method 2
receives reflected signals from that water
Implementation Method 3
A display LED, to emit light based on reflected signals showing a search result in water, is fixed on the display-rotating disk
Data Source
AI summary
The flasher-type multi-frequency fish finder includes a wideband ultrasonic transducer, a display-rotating disk, a motor and a control device. The plurality of display LEDs are composed of the first, second and third display LEDs. The control device has a signal-separating and obtaining part and a light-emission signal-producing part. The signal-separating and obtaining part separates the reflected signal and obtains the first reflected signal corresponding to the high frequency, the second reflected signal corresponding to the medium frequency, and the third reflected signal corresponding to the low frequency. The light-emission signal-producing part generates first, second and third light-emission signals based on the first, second and third reflection signals, respectively. The first, second and third annular-display regions are concentrically set on the display surface. Underwater detection results by high frequency, medium frequency and low frequency ultrasonic waves are simultaneously indicated by a flashing light in the first, second and third annular-display regions.