Global Organization
Based on the high humidity and dust environment of coal mines, laser methane sensors need to conduct the engineering design of waterproof, dustproof, impact-resistant, anti-electromagnetic interference, and other necessary coal mine electrical equipment. Figure 2 displays the developed laser methane sensor products.
With the rapid development of MIR laser technology, miniaturized laser trace gas sensors are gradually expected to be widely used in the coal mining industry. With increasing coal mine safety, the emphasis has shifted toward mine safety IoT.
This invited paper introduces the recent progress and typical applications of TDLAS-based methane sensors, carbon monoxide sensors, and multi-gas monitoring systems in coal mine gas monitoring, fire prevention, and early warning in intelligent coal mines.
However, the field application environment of coal mines has not been well studied. Based on the typical demand for coal mine fire monitoring and early warning, our group developed a laser multi-gas sensing system based on a multi-band semiconductor laser array. The schematic of the multi-gas sensing device is shown in Figure 8.
Methane (CH 4) is the most important gas in coal mine safety monitoring. When CH 4 in the concentration range of 5%–16% meets an open flame, it will immediately explode. By pressurizing fresh air flow from the ground to the coal mine, O 2 can be supplied underground, and the CH 4 concentration can be reduced.
FIGURE 5. The typical measurement data of CO monitoring system. The main difficulty in CO detection in underground coal mines is the elimination of the influence of CH 4, CO 2, and humidity on the measurement.
Abstract: Due to the coal mine safety requirements for a new generation of methane sensor in recent years, coal mine methane sensor laser has attracted more and more attention. Based …
This study was part of a two-year (2019–2020) ACARP program (C28010) aimed to tackle gas monitoring issues in underground coal mine tailgate return airway. In the …
Coal Mine Robot (project report) - Download as a PDF or view online for free. ... These detectors are often battery operated devices used for safety resolutions. ... 2013 …
Conventional underground coal mining relies upon the use of continuous miners in order to extract coal reserves from underground coal seams. In combination with the continuous miners-shuttle cars ...
Rescue work after a coal mine accident is fraught with challenges and dangers. Considering the safety of rescue workers and the urgency of a rescue mission, it is necessary …
This invited paper introduces the recent progress and typical applications of TDLAS-based methane sensors, carbon monoxide sensors, and multi-gas monitoring systems …
This paper introduces the research progress of laser methane sensors in coal mines, such as low -power technology, temperature and pressure compensation technology, self -diagnosis …
Inspectorate of Mines Introduction 1 Locomotives were introduced for underground operation in coal mines in the early 1930s but their use did not become widespread until after the 1939 …
Based on the high humidity and dust environment of coal mines, laser methane sensors need to conduct the engineering design of waterproof, dustproof, impact-resistant, …
Based on the principle of laser absorption spectroscopy, a laser methane sensor for mine use has been developed. The design of the sensor system is discussed and its …
Keywords – coal mining, mine environment, safety issues. I. INTRODUCTION The safety issues of coal mines have turned into a major concern for society. Coal is an important source of …
Due to the extremely complex working conditions, various health and safety hazards are present in underground coal mines, which cause economic losses and heavy …
Based on the working principle and characteristics of lead-acid batteries used in coal mine transportation vehicles, the inspection system of lead-acid batteries used in coal mine is …
the number of casualties in coal mines and ensure the safety of life and property, all the hazardous gases present in the mines need to be monitored online to prevent the potential …
Based on the working principle and characteristics of lead-acid batteries used in coal mine transportation vehicles, the inspection system of lead-acid batteries used in coal mine is …
In this paper, a low-power portable laser methane detection and alarm instrument based on VCSEL laser and a mobile methane alarm Internet of Things system for coal mine are …
This invited paper introduces the recent progress and typical applications of TDLAS-based methane sensors, carbon monoxide sensors, and multi-gas monitoring systems in coal mine gas monitoring...
invited paper, the principle, advantages, applications, and recent progress in TDLAS-based gas sensors used for coal mine safety are comprehensively introduced. Principles of laser...
1 Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China; 2 Shandong Micro-Sensor Photonics Ltd., Jinan, China; 3 School of …
A laser absorption spectrometer is described which employs a wavelength-tunable Pb(1-x) Sn(x) Se diode in conjunction with a multipass White cell and which is capable …
A mobile methane alarm Internet of things(IOT) system for coal mine based on portable instrument has been developed, which realizes real-time upload of data and cloud …
On the basis of the analysis of the technical problems faced by long-distance 3D laser scanning in underground coal mine working conditions, the principle of 3D laser scanning …