Crayfish Trap with Spiked Ramps and One-Way Doors
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Solution Overview
Problem
Existing crayfish traps are difficult to use and often sold incomplete, and they are not capable of capturing larger crayfish due to small openings.
Innovation Solution
A crayfish trap with a continuous wire mesh body, forward and rear spiked ramps, one-way doors, and a weight-down plate, designed to accommodate large crayfish, featuring a bait trap and access door for easy baiting and removal, with inner door harnesses to prevent exit and a mechanism for raising and lowering the trap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional crayfish traps are used, then they are simpler in structure, but they cannot capture larger crayfish due to small openings
Solution Approach 1:
The trap is divided into multiple functional segments: entry ramps with spikes, one-way doors, bait chamber, and capture chamber. This segmentation allows each part to perform its specific function optimally while accommodating large crayfish through the enlarged entry openings.
Solution Approach 2:
The trap design adds dimensional considerations by incorporating inclined ramps and multi-level door harnesses. The entry ramps slope upward from the bottom panel, and the one-way doors are positioned at different heights, creating a three-dimensional entry path that accommodates large crayfish while preventing escape.
2Ease of operation
If traditional crayfish traps are used, then they have simpler entry mechanisms, but they are difficult to operate and often sold incomplete
Solution Approach 1:
The top panel serves multiple functions: it provides structural support, houses the one-way door mechanism, includes the access door for baiting and removal, and incorporates attachment points for ropes. This multi-functionality reduces the need for separate components while improving ease of operation.
Solution Approach 2:
The one-way door harnesses automatically close behind entering crayfish without requiring manual operation. The spiked ramps self-activate as crayfish attempt to exit, using the crayfish's own movement against them. This reduces the operational complexity for the user.
3Reliability
If traditional crayfish traps are used, then they have fewer components, but they lack effective mechanisms to prevent crayfish exit
Solution Approach 1:
The spiked ramps convert the crayfish's natural escaping behavior into a harmful effect against itself. As crayfish attempt to climb out, the spikes curling inward catch their claws and bodies, preventing escape. The crayfish's own exit attempt activates the trapping mechanism.
Solution Approach 2:
The one-way door harnesses are pre-configured to close automatically when crayfish enter through the ramps. The inclined downward orientation and spring mechanisms are set in advance to prevent exit, creating a preliminary barrier before the crayfish can attempt to leave.
4Reliability
If traditional crayfish traps are used, then they are lighter with fewer components, but they lack effective bait retention mechanisms
Solution Approach 1:
The bait trap is nested within the trap body, specifically attached to the bottom panel or positioned in the capture chamber. This nested configuration allows the bait to be securely contained while still accessible to entering crayfish, improving bait retention without adding external 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
The trap effectively captures large crayfish by allowing easy entry while preventing exit, as demonstrated by experiments capturing significantly more crayfish compared to traditional traps, with efficient bait retention and trap deployment.
Implementation Method 1
A forward spiked ramp and a rear spiked ramp are attached to the bottom panel
Implementation Method 2
A forward one-way door and a rear one-way door are attached to the top panel
Implementation Method 3
A plate is mechanically coupled to the bottom panel and configured to weight down the crayfish trap
Implementation Method 4
A bait trap is attached to the plate configured to attract crayfish into the crayfish trap
Data Source
AI summary
A crayfish trap is configured to accommodate large crayfish. The crayfish trap includes a continuous wire mesh configured to form a top panel and a bottom panel. A forward spiked ramp and a rear spiked ramp are attached to the bottom panel. A plate is mechanically coupled to the bottom panel and configured to weight down the crayfish trap. A forward one-way door and a rear one-way door are attached to the top panel and slightly displaced from the forward spiked ramp and the rear spiked ramp permitting entry of the crayfish into the crayfish trap. A bait trap is attached to the plate configured to attract crayfish into the crayfish trap. The top panel includes a top access door configured to access the crayfish trap for baiting and crayfish removal.