Prototype of a low-cost luxmeter with wide measuring range designed for railway stations dynamic lighting systems

Hrbáč, Roman; Kolář, Václav; Novák, Tomáš; Bartłomiejczyk, Mikołaj

doi:10.1109/epe.2014.6839496

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…After a literature revision, the following lighting control approaches are identified: “Temperature Coefficient of Voltage Approach” measures the flow-through voltage of the white LED, which combined with the parameter Temperature Coefficient of Voltage allows sensing precisely the junction temperature of the LED, and based on this and the Temperature Coefficient of Efficiency, the referenced system implement an open loop control for maintaining the luminous intensity of the white LED constant [ 72 ]. “Feedback Photodiode Approach” measures the luminous intensity emitted by the white LED with a secondary receiver, such as a photodiode, and based on this value an open control loop is implemented for maintaining the luminous intensity of the white LED constant [ 73 ]. …”

Section: Uncertainty Driven Sensor Designmentioning

confidence: 99%

“…“Feedback Photodiode Approach” measures the luminous intensity emitted by the white LED with a secondary receiver, such as a photodiode, and based on this value an open control loop is implemented for maintaining the luminous intensity of the white LED constant [ 73 ].…”

Section: Uncertainty Driven Sensor Designmentioning

confidence: 99%

“…The second approach does not require any calibration, as the luminous intensity emitted by the white LED is auto-calibrated and compensated with the photodiode measurement. However, it must be taken into consideration that the measurement of the selected photodiode has a variability of approximately 5% over the desired operation temperate range [ 73 ]. This variation is assumed versus the variation observed in the LED and considering the required RGB and OD measurements precision for the prototypes development.…”

Section: Uncertainty Driven Sensor Designmentioning

confidence: 99%

See 2 more Smart Citations

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Palomo‐López

Mabe

Mezquita³

et al. 2018

Sensors

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Lubricant and hydraulic fluid ageing impacts the performance of the machines, gears, transmissions or automatisms where they are being used. This manuscript describes the work accomplished for bringing an innovative measurement concept for analysing the physical- chemical properties of these fluids, to a real industrial product ready to be integrated into different industrial equipment. The steps taken to deal with uncertainties and evolving requirements while progressing in the sensor development are described, covering the stages of theoretical formulation of the problem, optical and fluidic simulations, sensor prototype development and tests. The sensor working principle is based on a combination of transmittance and diffuse reflectance photonic inspection of the fluid sample that is collected in a micro-cavity through a standard hydraulic fitting. Photonics, electronics, micro-mechanics, fluidics, data processing and analysis has been merged with a deep knowledge in the lubricant degradation process to develop a sensor solution that is able to measure the Oil Degradation Index, Oil Oxidation, Acid Number, Ruler and Membrane Patch Colorimetry data from an in-service lubricating oil sample. The photonic micro sensor presented here offers a powerful tool that operates directly immersed in the fluid, at an economic cost and compacted size for in-line oil degradation monitoring.

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Section: Uncertainty Driven Sensor Designmentioning

confidence: 99%

Section: Uncertainty Driven Sensor Designmentioning

confidence: 99%

Section: Uncertainty Driven Sensor Designmentioning

confidence: 99%

See 1 more Smart Citation

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Palomo‐López

Mabe

Mezquita³

et al. 2018

Sensors

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“…Jawaaz Ahmad, Romana Yousuf use LDR as sensor on Lux Meter [23]. Roman Hrbac built a lux meter for dimmable lighting spread on trains to limit maximum energy consumption [24]. Alhaija, Qasem Abu designed a lux meter using ARM Cortex M4 with TM4C123 microcontroller [25].…”

Section: Introductionmentioning

confidence: 99%

Experimental Measurement and Analysis: Collimation and Illumination for Conformity Measuring Instrument Design in X-ray Modality

Fajar,

Ridha Makruf,

Pudji

et al. 2023

Indones.J.electronic.electromed.med.inf

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Each radiology or X-ray device is required to perform a functional or performance test of an X-ray aircraft in accordance with the radiation safety standards of the International Nuclear Energy Agency (IAEA). The suitability test has several parameters and parts. In the X-ray Aircraft Suitability Test, there are X-ray beam collimation tests, X-ray generators and tubes, and AEC. However, the illumination and collimation test still uses the manual method. The purpose of this research is to develop the simplest method, which is to measure the illumination at four points simultaneously and store the measurement data directly. This module is designed to use the HC-SR04 sensor as a distance meter and the TSL2561 sensor as a light meter. This module is designed using the HC-SR04 sensor as a distance meter and TSL2561 sensor as a lux meter. In this research, the module has been tested and compared with the results of a comparison tool (Digital Light Meter) and got an error value of 1.55% with a module efficiency of 98.45% in the illumination test, and an error of 1.8% with a module efficiency of 98.2% in the collimator test. From this research, it can be concluded that the light sensor TSL2561 can be used to measure the illumination area of the collimator lamp. The contribution of this research is expected to be more efficient tool testing, and the data will be saved until the next testing time

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Development and implementation of an intelligent system for permanent evaluation of light fixtures in a lighting system of transmission system substations

Mlčák

Hrbáč

Kolář

et al. 2015

2015 16th International Scientific Conference on Electric Power Engineering (EPE)

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Substations in the transmission system operated by ČEPS, a.s. are currently being modernized and a new system is being developed to ensure control, management and monitoring of lighting systems. This paper includes information about the development of the new monitoring system, especially with regard to ensuring secure and reliable communication between measuring systems and the central control system. The operation of substation lighting is monitored by PAC control system, which makes it possible to investigate different types of lighting. The use of PAC control system is aimed at ensuring reliable operation and control of outdoor lighting, as well as at the monitoring and investigation of remote control lighting systems in the transmission system substation. In this way, better control, greater safety and more effective maintenance may be achieved.

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Prototype of a low-cost luxmeter with wide measuring range designed for railway stations dynamic lighting systems

Cited by 4 publications

References 3 publications

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Experimental Measurement and Analysis: Collimation and Illumination for Conformity Measuring Instrument Design in X-ray Modality

Development and implementation of an intelligent system for permanent evaluation of light fixtures in a lighting system of transmission system substations

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