Low-cost sensor for online detection of harmful diesel combustion gases in UV-VIS region

2006 ◽  
Author(s):  
Martin Degner ◽  
Hartmut Ewald
Keyword(s):  
Low Cost ◽  
Diesel Combustion ◽  
Online Detection ◽  
Combustion Gases

Application of the Intelligent Sensor in Yarn Quality Online Detection

2011 ◽  
Vol 298 ◽  
pp. 20-22
Author(s):  
Qi Lan Huang ◽  
Wei Gang Qin ◽  
Gong Yuan Yang
Keyword(s):  
Low Cost ◽  
Computer Control ◽  
Laser Sensor ◽  
Online Detection ◽  
Intelligent Sensor ◽  
Control Techniques ◽  
Yarn Quality ◽  
Yarn Diameter ◽  
Development Direction ◽  
Quality Testing

This paper introduces application of the intelligent sensor in the yarn quality online detection. Using computer control techniques,Adopting the high accuracy intelligent laser sensor to detect the yarn diameter, display and print out the real-time evenness of the yarn by analyzing the yarn sampled datas. The device is more portable, forward-looking, intelligent and low cost, It is the development direction of the yarn quality testing in cotton factory.

scholarly journals Resonant Photoacoustic Gas Monitoring of Combustion Emissions

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 962 ◽  
Author(s):  
Mahmoud El-Safoury ◽  
Miguel Dufner ◽  
Christian Weber ◽  
Katrin Schmitt ◽  
Hans-Fridtjof Pernau ◽  
...  
Keyword(s):  
Sulphur Dioxide ◽  
Low Cost ◽  
Exhaust Gas ◽  
Gas Treatment ◽  
Combustion Gases ◽  
Gas Streams ◽  
Gas Detector ◽  
Waste Gas Treatment ◽  
Increasing Demand ◽  
Global Economic Growth

Since the entrance into the industrial era and the increasing demand for energy due to global economic growth and development, the amount of energy-related emissions have continuously grown every year to significantly high levels. Greenhouse gases like carbon dioxide, nitrous oxide or methane cause an increase in the earth’s temperature. Toxic gases like nitrous oxides, Sulphur dioxide and carbon monoxide are extremely detrimental to the health of all living beings. Over the past few years, global organizations are imposing tighter limits by international laws for flue-gas emissions from fossil-fuel combustion. Emission-limiting techniques like filter and scrubber systems have to be installed for waste gas treatment in the exhaust gas streams. In addition, exhaust gas measuring technologies detect the actual emission values of the respective target gases. We present the development of a low-cost and highly sensitive photoacoustic gas detector for the monitoring of emitted combustion gases. First tests were carried out with the toxic Sulphur dioxide (SO2) in secure lab conditions, where a sensitivity below 1 part per million (ppm) was achieved during continuous flow of the gas.

scholarly journals LED Driving Power Online Detection System

2017 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Youjian Lei ◽  
Xiaomin Lin
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Detection System ◽  
Low Cost ◽  
Current Transformer ◽  
Online Detection ◽  
Power Module ◽  
Control Module ◽  
Display Module ◽  
Thyristor Control

LED driving power is a necessary product for LED lighting; the behaviors of pursuing low-cost of some small and medium-sized enterprise producers in China directly affect the quality of LED power. Therefore, it is necessary to detect the reliability of the LED driving power. There are 4 main factors for the over-burning of the LED driving power: lightning oscillation frequency, voltage mutation frequency, switch motion frequency and static discharge frequency.For the above problems, this paper raises the LED driving power online detection system, including: surge voltage input module, main control module, pulse width modulation module, power module, thyristor control module, current transformer, amplifier, RMS-DC conversion module, A/D conversion module, display module, main control module connecting to surge voltage input module.The main operating principle is that the main control module connects the pulse width modulation module, which connects the thyristor control pole of the thyristor control module, the first anode thereof connects the power module; the primary side of current transformer connects the second anode of the thyristor control module through two wire switches, and the secondary side thereof connects the amplifier, which connects the RMS-DC conversion module; RMS-DC conversion module connects the A/D conversion module, which connects the main control module; the main control module also connects the display module. In addition, the project also provides the detection functions of LED output current, voltage digital display and different loads.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

Chromic Acid Etching of Polyethylene

1973 ◽  
Vol 31 ◽  
pp. 72-73
Author(s):  
J. D. Muzzy ◽  
R. D. Hester ◽  
J. L. Hubbard
Keyword(s):  
Chromic Acid ◽  
Low Cost ◽  
Acid Etching ◽  
Crystalline Morphology ◽  
Bulk Specimen ◽  
Morphological Studies ◽  
Perfect Form ◽  
Molecular Length ◽  
Lamellar Texture ◽  
Cost Studies

Polyethylene is one of the most important plastics produced today because of its good physical properties, ease of fabrication and low cost. Studies to improve the properties of polyethylene are leading to an understanding of its crystalline morphology. Polyethylene crystallized by evaporation from dilute solutions consists of thin crystals called lamellae. The polyethylene molecules are parallel to the thickness of the lamellae and are folded since the thickness of the lamellae is much less than the molecular length. This lamellar texture persists in less perfect form in polyethylene crystallized from the melt.Morphological studies of melt crystallized polyethylene have been limited due to the difficulty of isolating the microstructure from the bulk specimen without destroying or deforming it.

Glass Knife Geometry as Seen by the SEM

1971 ◽  
Vol 29 ◽  
pp. 454-455
Author(s):  
J. Temple Black
Keyword(s):  
Low Cost ◽  
Amorphous Material ◽  
Stress Concentrations ◽  
Basic Tool ◽  
Tool Materials ◽  
Optical Inspection ◽  
Surface Flaws ◽  
Slip Planes ◽  
Glass Knife ◽  
Diamond Knife

In ultramicrotomy, the two basic tool materials are glass and diamond. Glass because of its low cost and ease of manufacture of the knife itself is still widely used despite the superiority of diamond knives in many applications. Both kinds of knives produce plastic deformation in the microtomed section due to the nature of the cutting process and microscopic chips in the edge of the knife. Because glass has no well defined slip planes in its structure (it's an amorphous material), it is very strong and essentially never fails in compression. However, surface flaws produce stress concentrations which reduce the strength of glass to 10,000 to 20,000 psi from its theoretical or flaw free values of 1 to 2 million psi. While the microchips in the edge of the glass or diamond knife are generally too small to be observed in the SEM, the second common type of defect can be identified. This is the striations (also termed the check marks or feathers) which are always present over the entire edge of a glass knife regardless of whether or not they are visable under optical inspection. These steps in the cutting edge can be observed in the SEM by proper preparation of carefully broken knives and orientation of the knife, with respect to the scanning beam.

Spectraplot: A PC-based spectrum translation and display program

1988 ◽  
Vol 46 ◽  
pp. 918-919
Author(s):  
H. O. Colijn
Keyword(s):  
Low Cost ◽  
Transfer Program ◽  
File Transfer ◽  
Transfer Data ◽  
Error Checking ◽  
Data Files ◽  
The University

Many labs today wish to transfer data between their EDS systems and their existing PCs and minicomputers. Our lab has implemented SpectraPlot, a low- cost PC-based system to allow offline examination and plotting of spectra. We adopted this system in order to make more efficient use of our microscopes and EDS consoles, to provide hardcopy output for an older EDS system, and to allow students to access their data after leaving the university.As shown in Fig. 1, we have three EDS systems (one of which is located in another building) which can store data on 8 inch RT-11 floppy disks. We transfer data from these systems to a DEC MINC computer using “SneakerNet”, which consists of putting on a pair of sneakers and running down the hall. We then use the Hermit file transfer program to download the data files with error checking from the MINC to the PC.

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