Pressure-Retaining Seawater Sampling for Target Layer Selection
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Solution Overview
Problem
Existing deep-sea sampling technologies face challenges in automatically selecting specific seawater layers, evaluating sampling effects, and performing secondary sampling for failed samples, leading to low efficiency and large errors in obtaining integrity-preserving samples.
Innovation Solution
An automatic pressure-retaining sampling apparatus with a multi-sequence sampling filter unit, injection unit, pressurization unit, layer identification unit, and control unit, which automatically identifies seawater layers, adjusts pressure, and performs secondary sampling to ensure successful collection of seawater samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If existing sampling apparatus is used, then sampling operation is simple, but automatic selection of specific seawater layer cannot be achieved
Solution Approach 1:
The sampling apparatus is divided into multiple sampling bottles corresponding to different water layers, with each bottle independently controllable through a rotation unit and valve system. This segmentation enables automatic selection of specific layers while maintaining manageable system complexity through modular design.
Solution Approach 2:
The control unit integrates multiple functions including layer identification, pressure calculation, valve control, and sampling effect evaluation into a single system. This multi-functionality achieves automatic layer selection without proportionally increasing device complexity, as the control unit serves multiple purposes.
2Extent of automation
If existing sampling apparatus is used, then device structure is simple, but automatic evaluation of sampling effect cannot be performed
Solution Approach 1:
Pressure sensors in each sampling bottle provide real-time feedback to the control unit during sampling. The control unit automatically evaluates sampling effects by monitoring pressure changes and flow rates, enabling automatic assessment without manual intervention while keeping the feedback mechanism integrated into the existing system.
Solution Approach 2:
The system automatically evaluates its own sampling performance through integrated sensors and control logic. The apparatus self-assesses whether sampling requirements are met and triggers secondary sampling automatically, reducing the need for external evaluation equipment and minimizing added complexity.
3Extent of automation
If existing sampling apparatus is used, then operation procedure is simple, but secondary sampling for failed samples cannot be performed automatically
Solution Approach 1:
The control unit pre-calculates the required number of sampling bottles and their corresponding pressure values before deployment. This preliminary preparation enables automatic execution of secondary sampling when needed, as the system is pre-configured with the necessary parameters and bottle assignments, reducing the complexity of real-time decision-making.
Solution Approach 2:
The system continuously monitors sampling results through pressure and flow rate sensors, providing feedback to the control unit. When sampling fails to meet requirements, the feedback loop automatically triggers secondary sampling operations using pre-assigned bottles, enabling automatic retry without manual intervention while maintaining systematic control.
4Productivity
If manual sampling operation is used, then equipment complexity is low, but sampling efficiency is low
Solution Approach 1:
Multiple sampling bottles and their control mechanisms are integrated into a single coordinated system managed by one control unit. This merging of functions and components achieves automated multi-layer sampling in one deployment, significantly improving sampling efficiency without requiring separate apparatus for each layer, thus limiting the increase in overall complexity.
Solution Approach 2:
The control unit performs multiple functions including layer identification, pressure management, valve control, sampling evaluation, and secondary sampling initiation. This consolidation of multiple functions into a single control system improves sampling efficiency by automating the entire process while avoiding the complexity of having separate control systems for each function.
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 efficient and accurate sampling of specific seawater layers with autonomous evaluation and secondary sampling, ensuring high sampling efficiency and integrity of collected samples.
Implementation Method 1
a pressurization unit, wherein an output end of the pressurization unit is connected to the other end of the sampling kettle of each of the sampling filter modules
Implementation Method 2
the rotation unit rotates clockwise, the round ejector pin opens the sampling valve; after the rotation unit stops rotating, the long end portion of the double-end ejector rod closes the sampling valve
Implementation Method 3
measuring, by a layer identification unit, a real-time temperature, a real-time salinity, and a real-time depth of the seawater
Implementation Method 4
measuring, by a layer identification unit, a real-time temperature, a real-time salinity, and a real-time depth of the seawater
Implementation Method 5
controlling a water pump to be activated, opening a corresponding filter valve to perform seawater sampling
Implementation Method 6
The filter screen is configured to support the filter membrane. The flow rate meter is configured to measure the flow rate of filtered in-situ seawater
Implementation Method 7
The pressure sensor is configured to measure the internal pressure value of the sampling kettle in real time and transmit it to the control unit
Implementation Method 8
The flow rate meter is configured to measure the flow rate of filtered in-situ seawater and calculate the volume of filtered in-situ seawater
Data Source
AI summary
The present invention discloses an automatic pressure-retaining sampling apparatus and method for deep-sea specific layer seawater, relating to the technical field of deep-sea sampling. The sampling apparatus includes a rotation unit configured to drive sampling valves in a multi-sequence sampling filter unit to be opened and closed; the multi-sequence sampling filter unit configured to sample seawater and stabilize plankton; an injection unit configured to inject seawater or stabilization solution into the multi-sequence sampling filter unit; a pressurization unit configured to adjust a pressure of the multi-sequence sampling filter unit; a layer identification unit configured to automatically identify deep-sea target layers; a control unit configured to receive data transmitted from other units and control other units; and an outer frame configured to support other units. According to the present invention, through the coordinated operation of various units, a specific seawater layer can be automatically selected.