Hydraulic Support Straightness Detection Without Accumulative Error
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Solution Overview
Problem
Existing straightness detection devices for hydraulic supports in fully mechanized working faces suffer from high costs, cumbersome installations, and inaccuracies due to accumulative errors caused by using adjacent hydraulic supports as reference points, which do not meet working requirements.
Innovation Solution
A detection device comprising laser ranging groups and displacement sensors on hydraulic supports, converting error lengths and inclinations into electrical signals to adjust hydraulic support postures using support controllers, with reduced laser ranging groups as reference points to avoid accumulative errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If range finders are installed on each hydraulic support for straightness detection, then measurement coverage is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the measurement function from individual hydraulic supports and concentrates it in a single detection device mounted on one support. This device uses a laser range finder to measure the distance to a reflector on the coal wall, eliminating the need to install range finders on every support while maintaining detection capability.
Solution Approach 2:
The detection device serves multiple hydraulic supports simultaneously by using the coal wall reflector as a common reference point. A single device can detect straightness deviations for the entire working face by comparing measured distances against the coal wall profile, making the system universal rather than support-specific.
2Measurement precision
If range finders are installed on each hydraulic support, then measurement capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent removes the expensive range finder component from multiple supports and concentrates it in a single detection device. This extraction reduces the total number of range finders needed from N (one per support) to just one, significantly lowering manufacturing and equipment costs.
Solution Approach 2:
The patent replaces expensive, complex range finder installations on each support with a simpler, more economical detection device that uses optical measurement to the coal wall. This substitution uses more affordable components while achieving the same measurement objective.
3Ease of operation
If adjacent hydraulic supports are used as reference points for measurement, then measurement process is simplified, but accumulative error increases reducing measurement precision
Solution Approach 1:
The patent introduces the coal wall reflector as an intermediary reference point that is external to the hydraulic support system. By measuring distances to this stable external reference rather than to adjacent supports, the system avoids the accumulative error that occurs when measurements are chained through multiple intermediate supports.
Solution Approach 2:
Instead of using the hydraulic supports themselves as reference points for measuring each other's positions, the patent inverts the approach by using an external, stable reference (the coal wall) to measure the supports' positions. This reverses the measurement paradigm from support-to-support to external-reference-to-support.
4Adaptability or versatility
If the original structure of hydraulic supports is modified to install range finders, then measurement functionality is added, but ease of manufacture and deployment is reduced
Solution Approach 1:
The patent extracts the measurement functionality from the hydraulic support structure itself and places it in a separate, dedicated detection device. This allows the original support structure to remain unchanged while adding measurement capability through an independently mounted device on a single support.
Solution Approach 2:
The patent segments the measurement function from the support function, creating a separate detection device that can be mounted on existing supports without modifying their primary structural role. This segmentation allows the supports to maintain their original design while the detection device provides added functionality.
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
Ensures accurate posture adjustment of hydraulic supports, reducing installation complexity and costs while maintaining straightness and posture state requirements, without altering the original structure.
Implementation Method 1
a plurality of hydraulic supports, two laser ranging groups, a plurality of displacement sensors
Implementation Method 2
Each displacement sensor is arranged in an advancing oil cylinder of a respective one of the plurality of hydraulic supports, and is configured to obtain at least an inclination of the respective one of the plurality of hydraulic supports
Data Source
AI summary
Disclosed is a detection device for a working surface. The detection device (100) comprises: a plurality of hydraulic supports (101), a laser ranging set (102), a displacement sensor (103), a hydroelectric signal conversion module (104), and a support controller (105) which are disposed on a working surface. The laser ranging set (102) is disposed below a top beam of a first target hydraulic support among the plurality of hydraulic supports and parallel to a post of the first target hydraulic support, and is configured to determine error length and send the error length to the hydroelectric signal conversion module (104). The displacement sensor (103) is configured to at least obtain the degrees of inclination of the hydraulic supports (101) and send the degrees of inclination to the hydroelectric signal conversion module (104). The hydroelectric signal conversion module (104) is configured to convert the error length and the degrees of inclination into electrical signals and send the electrical signals to a support controller (105) of the first target hydraulic support. The support controller (105) is configured to determine working parameters of the plurality of hydraulic supports on the basis of the electrical signals, so as to adjust the postures of the plurality of hydraulic supports on the basis of the working parameters. Further disclosed is using a detection method for a working surface, a terminal that performs the detection method, and a storage medium.