Smart intelligent control of current source for high power LED diodes

Krejcar, Ondřej; Frischer, Robert

doi:10.1016/j.mejo.2013.02.004

Cited by 16 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At least three laser modules (7) are disposed between two base plates (5) thus forming a sectional plane of total angle of 360 degrees. A power supply unit (4) and an inertial system module for measuring incline are disposed in one of the base plates (5). A digital camera (2) is suspended on steel wire ropes in a suspension (1) above the all laser modules (7) at a suitable distance.…”

Section: Evolution Of Laser Systemmentioning

confidence: 99%

Mining Shaft Inspection by Laser Photogrammetry

Vala

Slanina²,

Walendziuk³

2016

ElAEE

View full text Add to dashboard Cite

One of the most important tasks in the area of mining safety is the inspection of vertical mining shaft. Geological processes in the rock mass rise problems with all used mining components over a long-term period. There is a possibility of occurrence of an equipment deformation or destruction in all directions (there are installed pipelines, cables, long vertical linear guidance, etc. inside a shaft). Periodical inspection of mining shaft profile and its analysis are necessary to ensure a safe transport both of the material and especially staff. Base of the solution of this problem lies in the use of contactless measurement methods of the profile, such as photogrammetry described in this article. First it gives a description of photogrammetry problem, pros and cons of proposed implementation with solid state LED or LASER LED used as light sources (instead of xenon flash tube) as well as flash timing and control and spectral distribution of the light. Then computer analysis of mining shaft profile as a part of rapid diagnostics is described.

show abstract

Section: Evolution Of Laser Systemmentioning

confidence: 99%

Mining Shaft Inspection by Laser Photogrammetry

Vala

Slanina²,

Walendziuk³

2016

ElAEE

View full text Add to dashboard Cite

show abstract

“…For the developments of future technologies, solarpowered LED lighting technologies [9][10][11][12][13] can offer the offgrid energy services for the rural area and for the poor, while white LED based PV lighting systems [14] and organic LED lighting technologies [15,16] can continue to be explored in the area of energy saving lighting technologies. Besides, power management and intelligent control [17][18][19], thermal analysis and optimization [20,21], cooling [22], and reliability issue [23] are also important for LED technology developments. Particularly, solar power, fuel cells, and LEDs combine to light the way towards green economy [24].…”

Section: Trends Of Global Led Technologies and Marketsmentioning

confidence: 99%

Competing in the Global LED Industry: The Case of Taiwan

2014

International Journal of Photoenergy

View full text Add to dashboard Cite

Light-emitting diode (LED) is a very essential application for energy-savings nowadays. The revenue of the Taiwan LED components industry is ranked top one in the world, followed by that of Japan and South Korea. Based on the advantage of their electronics industry, Taiwanese LED companies create a unique model to compete with the international firms. Large international LED companies achieve economies of scale by vertically integrating their operations. Taiwanese LED companies specialize and achieve an optimal efficiency by vertically disintegrating across the upstream, midstream, and downstream sectors in the value chains. Taiwanese LED companies create economies of scale and economies of scope through a complete industrial value chain.

show abstract

“…The final price of the temperature sensor is $6 with the PCB, of where the electronic parts cost only $3. The cost is pretty low because of the characteristics of the target system [ 11 – 14 ]. As mentioned above, these temperature systems have very long time constants, so the working frequencies are in order of units of hertz and therefore demands on the quality of electronics parts can be lower.…”

Section: Comparing Of Developed Temperature Sensor To Preceding Simulmentioning

confidence: 99%

Precise Temperature Measurement for Increasing the Survival of Newborn Babies in Incubator Environments

Frischer

Penhaker

Krejcar

et al. 2014

Sensors

Self Cite

View full text Add to dashboard Cite

Precise temperature measurement is essential in a wide range of applications in the medical environment, however the regarding the problem of temperature measurement inside a simple incubator, neither a simple nor a low cost solution have been proposed yet. Given that standard temperature sensors don't satisfy the necessary expectations, the problem is not measuring temperature, but rather achieving the desired sensitivity. In response, this paper introduces a novel hardware design as well as the implementation that increases measurement sensitivity in defined temperature intervals at low cost.

show abstract

Smart intelligent control of current source for high power LED diodes

Cited by 16 publications

References 28 publications

Mining Shaft Inspection by Laser Photogrammetry

Mining Shaft Inspection by Laser Photogrammetry

Competing in the Global LED Industry: The Case of Taiwan

Precise Temperature Measurement for Increasing the Survival of Newborn Babies in Incubator Environments

Contact Info

Product

Resources

About