Connecting Tube Verticality Measurement for Diaphragm Wall Alignment
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Solution Overview
Problem
Existing measuring arrangements for trench production in the ground, such as those used for diaphragm walls, suffer from inaccuracies due to mechanical parts that require extensive maintenance and are prone to measurement errors when exposed to dirt and concrete suspension, especially in construction sites.
Innovation Solution
A measuring arrangement using a torsionally rigid and deflectable connecting tube, which is coaxial to the vertical measurement axis, allows for precise angle measurement with reduced maintenance needs, and can be rotated for error compensation, combined with multiple measuring cables for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cardanic bearing with multiple mechanical parts is used to connect the measuring means to the working apparatus, then measurement precision is improved, but maintenance time and effort increase significantly and measurement reliability decreases when exposed to dirt and concrete suspension
Solution Approach 1:
The patent replaces the mechanical cardanic bearing system with a magnetic field-based measurement system. The magnetic field penetrates the connecting tube wall without mechanical contact, eliminating the need for mechanical parts that require maintenance while preserving measurement precision. This substitution of mechanical systems with field-based systems resolves the contradiction between precision and maintainability.
Solution Approach 2:
The connecting tube acts as an intermediary element that mechanically connects the measuring means to the working apparatus while allowing magnetic field penetration. This intermediary structure enables both mechanical stability and non-contact measurement, resolving the contradiction by decoupling the mechanical connection function from the measurement function.
2Measurement precision
If a cardanic bearing with multiple mechanical parts is used, then measurement precision is improved, but reliability decreases when exposed to dirt and concrete suspension
Solution Approach 1:
The patent replaces the mechanical cardanic bearing system with a magnetic field-based measurement system. The magnetic field penetrates the connecting tube wall without mechanical contact, eliminating the need for mechanical parts that require maintenance while preserving measurement precision. This substitution of mechanical systems with field-based systems resolves the contradiction between precision and maintainability.
Solution Approach 2:
The connecting tube acts as an intermediary element that mechanically connects the measuring means to the working apparatus while allowing magnetic field penetration. This intermediary structure enables both mechanical stability and non-contact measurement, resolving the contradiction by decoupling the mechanical connection function from the measurement function.
3Reliability
If the measuring means is kept torque proof about the vertical measurement axis, then measurement reliability is improved, but adaptability decreases when rotation is required for error compensation
Solution Approach 1:
The patent replaces the mechanical torque-proof connection with a magnetic field-based measurement system that allows free rotation. The magnetic field measurement of the pendulum's angle of inclination remains accurate regardless of the connecting tube's rotational position, enabling both torque-proof reliability and rotational adaptability for error compensation.
Solution Approach 2:
The patent implements a dynamically adaptable system where the connecting tube can rotate freely about the vertical measurement axis. This dynamic capability allows the system to adjust its orientation for error compensation while the magnetic field-based measurement maintains reliability throughout the rotation, resolving the contradiction between fixed reliability and dynamic adaptability.
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 solution provides robust and precise measurement capabilities with minimal maintenance, enabling accurate trench production and reducing material waste and tool wear by ensuring precise alignment of diaphragm wall segments.
Implementation Method 1
at least one measuring means which is connected to a corresponding measuring cable and designed to measure an angle of inclination of the measuring cable relative to a vertical measurement axis
Implementation Method 2
the connecting tube is configured to be torsionally rigid about the vertical measurement axis and deflectable with respect to the vertical measurement axis
Data Source
AI summary
The invention relates to a measuring arrangement for measuring a position, in particular a verticality, of a vertically adjustable and lowerable working apparatus with respect to an upper fixed point, with at least one measuring cable which is on the one hand connected to the vertically adjustable working apparatus and on the other hand extends towards the fixed point, at least one measuring means which is connected to the corresponding measuring cable and designed to measure an angle of inclination of the measuring cable relative to a vertical measurement axis and is arranged in a connection region between the measuring cable and the working apparatus, and at least one connecting means which is arranged between the measuring means and the working apparatus and designed to keep the measuring means torsion proof about the vertical measurement axis and at the same time capable of being angled with respect to the vertical measurement axis on the working apparatus. According to the invention provision is made in that the connecting means has a connecting tube which is arranged coaxially to the vertical measurement axis, and in that the connecting tube is designed so as to be torsion proof about the vertical measurement axis and deflectable with respect to the vertical measurement axis.