Elastic Wave Coal Rock Interface Detection Device
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Solution Overview
Problem
Existing coal rock identification technologies face challenges such as interference from working face environments, low recognition accuracy, and long recognition cycles, while also posing health risks from artificial gamma rays.
Innovation Solution
A coal rock interface directional detection device and method based on elastic waves, which includes a probe body with elastic wave receiving and excitation devices, a protective tube with a collection circuit board, and a control host for wireless communication, allowing for accurate detection of coal rock interfaces and coal seam thickness using elastic wave propagation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gamma ray methods are used to estimate coal seam thickness, then detection can be performed, but health safety is compromised due to artificial gamma ray radiation
Solution Approach 1:
The patent replaces electromagnetic radiation (gamma rays) with elastic wave mechanics to detect coal seam thickness. The elastic wave detection device transmits elastic waves through the coal seam and measures wave propagation characteristics to determine thickness, eliminating radiation hazards while maintaining detection capability.
Solution Approach 2:
The patent introduces elastic waves as an intermediary medium between the detector and the coal seam. Instead of using direct radiation that penetrates and harms, elastic waves serve as a safe intermediary that carries detection information through the coal seam without causing radiation damage.
2Ease of operation
If infrared recognition methods are used for coal and rock layer detection, then non-contact detection is achieved, but recognition accuracy is low due to environmental factors and temperature effects
Solution Approach 1:
The patent replaces optical/infrared detection with elastic wave detection. Elastic waves are less sensitive to environmental factors like temperature and dust compared to infrared radiation, providing both non-contact detection capability and higher accuracy by measuring wave propagation time and amplitude through the coal seam.
3Ease of operation
If image recognition methods are used to determine coal rock layers, then visual identification is possible, but image quality is greatly affected by dust and light environmental factors
Solution Approach 1:
The patent replaces optical imaging with elastic wave propagation measurement. Instead of capturing images that are degraded by dust and light, the system transmits elastic waves through the coal seam and measures wave characteristics, providing a measurement method that is inherently immune to visual environmental interference.
4Measurement precision
If geological radar detection methods are used to calculate coal seam thickness, then electromagnetic wave reflection is utilized, but electromagnetic waves attenuate significantly in thick coal seams
Solution Approach 1:
The patent replaces electromagnetic wave propagation with elastic wave propagation. Elastic waves experience significantly less attenuation in coal seams compared to electromagnetic waves, allowing accurate thickness measurement of thick coal seams by measuring the time and amplitude of elastic wave reflections and transmissions.
5Ease of operation
If vibration signal recognition methods are used to detect coal and rock layers, then cutting vibration signals are utilized, but recognition accuracy is low when hardness of coal and rock is close and mechanical equipment interference occurs
Solution Approach 1:
The patent replaces vibration signal analysis with elastic wave propagation measurement. Instead of relying on vibration signals that are contaminated by mechanical equipment noise and similar between close-hardness materials, the system uses elastic wave time-of-flight and amplitude measurements that directly reflect the acoustic properties of the coal seam, providing superior accuracy even when material hardness differences are minimal.
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 a stable, high-accuracy, and fast coal rock interface detection method that minimizes environmental interference and ensures operator safety, effectively determining coal seam thickness and providing reliable data for geological explorations.
Implementation Method 1
a probe body with elastic wave receiving and excitation devices, a protective tube with a collection circuit board, and a control host for wireless communication, allowing for accurate detection of coal rock interfaces and coal seam thickness using elastic wave propagation characteristics
Implementation Method 2
receiving reflected waves generated by electromagnetic wave pulses at the coal rock interface
Data Source
AI summary
A coal rock interface directional detection device based on elastic waves includes: a probe body including an elastic wave receiving device and an elastic wave excitation device spaced set at the top; a protective tube with one end connected to the adapter. The protective tube includes a collection circuit board inside the protective tube, and the collection circuit board is electrically connected to the elastic wave receiving device and the elastic wave excitation device; a sleeve, installed outside the protective tube, with one end connected to the side of the probe body near the adapter and with the other end connected to the side of the protective tube away from the adapter; and a control host, wirelessly connected with the acquisition circuit board. A coal rock interface directional detection method based on elastic waves applied in the coal rock interface directional detection device is also disclosed.