Slotted Wall Gripper Soil Detection via Pressure Feedback
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Solution Overview
Problem
Operators of trench wall grabs face challenges in effectively excavating deep trenches due to limited visibility and difficulty in identifying soil layers and obstacles, which affects the efficiency and safety of the excavation process.
Innovation Solution
Integration of a measuring device and control unit that determine path and pressure when the grab scoops close, providing real-time feedback on soil conditions, allowing for informed adjustments in operation and potential use of alternative tools for overcoming obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If trench depth is increased to reach deeper soil layers, then excavation capability is improved, but operator visibility of the trench bottom deteriorates
Solution Approach 1:
A camera system is introduced as an intermediary device to capture images of the trench bottom and transmit them to the operator's control cabin. This allows the operator to see deep trench areas without direct line of sight, resolving the visibility problem while maintaining deep excavation capability.
Solution Approach 2:
The direct visual observation mechanism is replaced with an electronic imaging and transmission system. Instead of relying on natural light and direct sight, the system uses cameras, lighting, and display technology to provide visual information to the operator.
2Strength
If grab force is increased to handle harder soil layers, then excavation effectiveness is improved, but energy consumption increases
Solution Approach 1:
The grab force is made dynamically adjustable based on real-time soil condition feedback. The system monitors resistance during penetration and automatically adjusts the actuating force, applying maximum force only when encountering hard layers and reducing force for softer soils, thereby optimizing energy consumption.
Solution Approach 2:
A feedback system monitors the resistance encountered during trench penetration and transmits this information to the control unit. The control unit adjusts the actuating device's force output based on this feedback, creating a closed-loop control system that optimizes energy usage while maintaining effective excavation.
3Productivity
If real-time soil monitoring is implemented, then excavation efficiency is improved, but device complexity increases
Solution Approach 1:
The measuring device is designed to perform multiple functions: it measures penetration resistance, determines soil type, monitors grab force requirements, and provides feedback for both automatic control and operator information. This multi-functionality reduces the need for separate specialized sensors and systems.
Solution Approach 2:
The system automatically adjusts excavation parameters based on real-time soil condition measurements without requiring manual intervention. The control unit autonomously processes sensor data and modifies operating parameters, reducing the complexity of manual monitoring and adjustment procedures.
Data Source
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AI summary
The invention relates to a diaphragm wall grab and a method for creating a trench in the ground, wherein a diaphragm wall grab is used which has a grab frame at the lower end of which two grab blades are arranged, which are adjustable between an open position and a closed position by means of an actuating device, wherein the grab blades grasp soil material and collect it in the closed position. According to the invention, it is provided that a measuring device determines a displacement and/or a pressure when the grab blades close and that the measuring device transmits the measured values to a control unit which is configured to make a statement about the soil material based on the measured values determined by the measuring device.