Fiber Optic Temperature and Gas Concentration Sensor for Mine Goaf Area Inner Detecting

2012 ◽  
Vol 524-527 ◽  
pp. 302-305
Author(s):  
Yu Bin Wei ◽  
Xu You Wang ◽  
Min Xin ◽  
Tong Yu Liu ◽  
Chang Wang
Keyword(s):  
Spontaneous Combustion ◽  
Detection System ◽  
Fire Detection ◽  
Tunable Diode Laser ◽  
Gas Concentration ◽  
Beam Tube ◽  
Sensing Technology ◽  
Detection Technology ◽  
Primary Means ◽  
On Line

Spontaneous combustion in coal goaf area is one of major disasters in coal mines. Detection technology based on signature Gas and Temperature is the primary means of spontaneous combustion forecasting of coal goaf area. A real-time remote fire detection system is proposed based on tunable diode laser absorption spectroscopy technology and FBG temperature sensing technology, to achieve valid detect of gas concentration and temperature. The System include fiber mathen concentration sensor and fiber temperature sensor based FBG. The system achieved remote on-line monitoring of gas concentration and temperature in mine goaf, meet the fire forecast need for Coal goaf area. There are obvious advantages Compared with the existing beam tube monitoring system in coal mine.

scholarly journals Fire Detection Technology for Turbine-Powered Transportation

1970 ◽  
Author(s):  
T. M. Trumble
Keyword(s):  
High Temperature ◽  
Detection System ◽  
Fire Detection ◽  
Vehicle Design ◽  
Design Phase ◽  
Detection Systems ◽  
Detection Technology ◽  
Operational Envelope

The problems of providing a fire and overheat detection system for turbine-powered vehicles must be solved during the design phase of the vehicle. In order to accomplish this goal the vehicle design engineer must be aware of the basic constraints involved in the application of fire detection technology. This paper presents a condensed method for understanding, designing and evaluating fire and overheat detection systems. Advanced concepts and technologies such as optical redundancy and high temperature ultraviolet sensors are discussed. Performance of fire and overheat detection systems designed using this approach will provide maximum safety for those using the vehicles, as well as those in its operational envelope.

The Research on the Low Clutch’s Noise Detection Technology which Based on the Wavelet Transform

2012 ◽  
Vol 433-440 ◽  
pp. 4082-4086
Author(s):  
Yue Dong Chen ◽  
Chang Zhong Yu
Keyword(s):  
Wavelet Transform ◽  
Fault Detection ◽  
Detection System ◽  
Rotating Machinery ◽  
Noise Detection ◽  
Machine Vibration ◽  
Bearing Defects ◽  
Detection Technology ◽  
On Line ◽  
Reasonable Choice

The essay introduce the hardware Design based on the Line detection system, and apply the wavelet analysis theory to the low clutch’s fault signal processing to fulfill the low clutch’s noise detection which based on the wavelet transform. Practice shows that the continuous wavelet signal has a strong ability of fault detection, if reasonable choice of wavelet function and various parameters among the fault detection, the local feature of the fault signal can be intuitively got, thus supply the products with a effective tool. The current washing machine clutch all have a washing deceleration function, so it is called as low clutch. As one of the most common parts of rotating machinery, low clutch is also one of the easily damaged parts among the rotating machinery. According to statistics, thirty percent of the rotating machinery’s operational problems caused by the bearing faults[1]. Bearing defects can cause severely machine vibration and generation noise, or even cause damage to the equipment[4]. This article is mainly detect the low clutch’s vibration noise in operation by accelerometer, and deal with the collected data through wavelet transform, thus realize the On-line condition monitoring to the low clutch.

The paste filling pipe flow on-line detection system based on ultrasonic

2014 ◽  
Vol 11 (4) ◽  
pp. 397-402 ◽  
Author(s):  
Guimei Wang ◽  
Shuai Zhang
Keyword(s):  
Pipe Flow ◽  
Detection System ◽  
Mining Industry ◽  
Line Detection ◽  
Filling Material ◽  
Ultrasonic Detection ◽  
Detection Technology ◽  
On Line ◽  
Working Principle ◽  
Ultrasonic Detection Technology

Recently, filling mining is becoming more and more important in the mining industry and has been used widely. In order to better control the process of paste filling mining and acquire the accurate amount of filling material used, and to reduce the waste of paste filling material, we should detect in real time the paste flow in the pipe during the process of filling. This paper introduces in detail the basic principle of ultrasonic detection technology and the hardware composition and working principle of the on-line detection system. The author uses the theory of unascertained error analysis of detecting data and implements ultrasonic detection technology to realize on-line detection of paste filling pipe flow.

Research on On-line Detection and Data Processing Technology of Welding Seam for Bellow

2011 ◽  
Vol 66-68 ◽  
pp. 1714-1717
Author(s):  
Zhong Wei Ren ◽  
Zhen Yun Duan ◽  
Wen Hui Zhao ◽  
Guo Fu Tian ◽  
Yuan Tao Wang
Keyword(s):  
Detection System ◽  
Line Detection ◽  
Laser Sensor ◽  
Welding Seam ◽  
Ieee 1394 ◽  
Detection Technology ◽  
On Line ◽  
Joint Center ◽  
Along Track ◽  
Welding Technique

In order to improve the welding quality and welding speed of irregular bellows, according to the characteristic of welding seam of bellows, an automatic and on-line detection technology is proposed in welding technique. The infrared laser sensor is used for measuring with non-contact and real-time detection of welded joint center, the position of welding seam is transfered by the IEEE-1394(Fire Wire). After data preprocessing, the coordinates of feature point are extracted, be storaged and forecasted, then sent to the control system, the moving of welding gun is controlled along track scanning. According to the accuracy analysis of on-line detection system of bellows, the technology of tracking measurement is stable and reliable, and it is effective for improving measuring accuracy and efficiency.

scholarly journals Analysis and Detection of a Target Gas System Based on TDLAS & LabVIEW

2019 ◽  
Vol 9 (3) ◽  
pp. 4196-4199 ◽  
Author(s):  
F. Alorifi ◽  
S. M. A. Ghaly ◽  
M. Y. Shalaby ◽  
M. A. Ali ◽  
M. O. Khan
Keyword(s):  
Absorption Spectrum ◽  
Second Harmonic ◽  
Detection System ◽  
Infrared Absorption Spectrum ◽  
Gas Absorption ◽  
Tunable Diode Laser ◽  
Gas Detection ◽  
Measured Signal ◽  
Gas Concentration ◽  
Detection Techniques

This paper introduces detection techniques of target gas concentration based on infrared absorption spectrum method and the simulation of the gas detection system using LabVIEW. In this work, the harmonic detection is performed by wavelength modulation technique with a related frequency signal to cover the measured signal and get the gas absorption coefficient that can be analysed to give a gas concentration. A series of simulations are carried out to scan weak absorption lines and extract the second harmonic curve of the absorption spectrum of the target gas. The absorption and second harmonic curves are acquired by changing the parameters of the target gas concentration and line width. This work claims to be a contribution to the study and the comprehension of gas detection system based on tunable diode laser absorption spectroscopy and can serve as a basis for practical data acquisition.

Research on Infrared Laser Leak Detection for Natural Gas Pipeline

2012 ◽  
Author(s):  
Bin Xu ◽  
Dongliang Yu ◽  
Jiayong Wu ◽  
Hongchao Wang ◽  
Dongjie Tan ◽  
...  
Keyword(s):  
Natural Gas ◽  
Detection System ◽  
Leak Detection ◽  
Infrared Laser ◽  
Gas Pipeline ◽  
Tunable Diode Laser ◽  
Laser Absorption ◽  
Natural Gas Pipeline ◽  
Detection Technology ◽  
Gas Leak

An airborne infrared laser leak detection technology is proposed to detect natural gas pipeline leakage by helicopter which carrying a detector that can detect a high spatial resolution of trace of methane on the ground. The principle of the airborne infrared laser leak detection system is based on tunable diode laser absorption spectroscopy. The system consists of an optical unit including the laser, camera, helicopter mount, electronic unit with GPS receiver, a notebook computer and a pilot monitor. And the system is mounted on a helicopter. The principle and the architecture of the airborne infrared laser leak detection system are presented. Field test experiments are carried out on West-East Natural Gas Pipeline of China, and the results show that the airborne laser leak detection method is suitable for detecting gas leak of pipeline on plain, desert and hills but unfit for the area with large altitude diversification.

scholarly journals RESEARCH ON METHANE LEAK DETECTION TECHNOLOGY BASED ON INFRARED ABSORPTION PRINCIPLE

2021 ◽  
Vol 5 (11) ◽  
Author(s):  
X.Y. Chen ◽  
Y Peng ◽  
Q. Miao ◽  
L Ge ◽  
X.Y Zheng ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Natural Gas ◽  
Infrared Absorption ◽  
Methane Concentration ◽  
Detection System ◽  
Clean Energy ◽  
Gas Concentration ◽  
Consumption Structure ◽  
Gas Leakage ◽  
Detection Technology

As a clean energy, natural gas accounts for an increasing proportion of my country's energy consumption structure. Due to the flammable and explosive characteristics of natural gas, natural gas leakage can easily cause safety accidents. This paper has designed a gas concentration detection system based on the principle of infrared absorption, which can detect the methane concentration in natural gas, quickly determine whether there is a methane leak, and effectively protect people's lives and property.

scholarly journals Digital Print Synthesis Based on Image Processing and Interactive Technology

2022 ◽  
Vol 2146 (1) ◽  
pp. 012028
Author(s):  
Lijun Sun
Keyword(s):  
Artificial Intelligence ◽  
Error Rate ◽  
Detection System ◽  
Human Life ◽  
Fire Detection ◽  
Detection Technology ◽  
Artificial Intelligence Technology ◽  
Internal Mechanism ◽  
Fire Detection System ◽  
The Many

Abstract Fire is a common disaster, which causes major threats and losses to human life and property. Countries around the world have been committed to the study of the mechanism and internal mechanism of fires, with the goal of preventing fires from occurring and minimizing the losses caused by fires. Among the many methods, fire detection technology is an effective method to prevent and reduce the occurrence of fire. This article focuses on the research of the fire detection system based on artificial intelligence technology, improves the accuracy of the fire detection system by introducing artificial intelligence technology into the fire detection system, and uses experiments to verify the error rate of the artificial intelligence technology fire detection system. The experimental results show that the system’s detection of fire is not very different from the actual situation, and the error rate is within 10%. Then compared with the traditional detection system, the detection performance is relatively high, and the error rate can be reduced by one time.

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