Novel Algan Heterostructures for UV Sensors and Leds

2004 ◽  
pp. 143-159
Author(s):  
M. Stutzmann
Keyword(s):  
Uv Sensors

A Comparison of UV Sensors - Success and Challenges

2015 ◽  
Vol 2015 (9) ◽  
pp. 2642-2652
Author(s):  
Gary Hunter
Keyword(s):  
Uv Sensors

Large-scale, single-oriented ZnO nanostructure on h-BN films for flexible inorganic UV sensors

2021 ◽  
Vol 130 (22) ◽  
pp. 223105
Author(s):  
Hongseok Oh ◽  
Youngbin Tchoe ◽  
Heehun Kim ◽  
Jiyoung Yun ◽  
Mingi Park ◽  
...  
Keyword(s):  
Large Scale ◽  
Zno Nanostructure ◽  
Uv Sensors

Assessment of UV Sensors for Flameout Detection

2017 ◽  
Author(s):  
Edouard Bahous ◽  
Ram Srinivasan ◽  
Priyank Saxena ◽  
John Bowen
Keyword(s):  
Response Time ◽  
Detection System ◽  
Signal Strength ◽  
Sensor Response ◽  
System Level ◽  
Fuel Composition ◽  
Engine Load ◽  
Uv Sensor ◽  
Uv Sensors ◽  
Load Conditions

UV sensors were tested to evaluate the response and reliability as a flameout detection system to reduce system level risks. In this study, UV sensors from two manufacturers were tested on high pressure experimental rigs and on a 15MW gas turbine engine with annular diffusion flame combustion system. Tests were run to investigate the effect of fuel composition, engine load, and sensor circumferential position. The effect of each variable on sensor signal strength and response time is presented in this paper. The response time of the sensor is evaluated against the rate of change of combustor pressure and the time for fuel-air mixture to reach lean extinction limit in the primary zone. Results show that the UV sensor response is not affected by engine load, circumferential location of the sensors, or fuel composition down to Wobbe index of 18.7 MJ/Sm3. At lower Wobbe indices, the signal strength decreased significantly. This result has been attributed to the movement of flame location away from the line of sight of the sensor. Furthermore, it was found that the UV sensor responded before the bulk average reactant mixture reached lean blow out fuel-air ratios. When compared to the baseline detection system the UV sensor performs faster at low load conditions (800 milliseconds) but slower at full load conditions (400 milliseconds). Experimental rig testing led to similar conclusions for sensor response time and signal strength. Future testing of UV sensors on hydrogen blends is planned.

ULTRA VIOLET DETECTION SENSORS

2006 ◽  
Vol 16 (02) ◽  
pp. 583-588
Author(s):  
Vahé NERGUIZIAN ◽  
Mustapha RAFAF ◽  
Muthukumaran PACKIRISAMY ◽  
Ion STIHARU
Keyword(s):  
Human Skin ◽  
Uv Radiation ◽  
Radiation Risk ◽  
Ultra Violet ◽  
Visual Monitoring ◽  
Ultra Violet Light ◽  
Actuation Mechanism ◽  
Violet Light ◽  
Uv Sensors ◽  
Chemical Material

This article presents an innovative and creative approach to detect harmful level of Ultra Violet light on human skin. Different commercial UV sensors are evaluated for comparison. The comparison is made for performance, cost and dimension. The proposed affordable UV sensor solutions are presented using chemical and MEMS/MOEMS technologies. The UV dynamic sensor detects the harmful level of UV and informs the user about the eventual UV radiation risk. The proposed two solutions consider chemical material for UV detection and different actuation mechanism to inform the UV harmful level to the user. These sensors are non disposable and are packaged for visual monitoring (without battery) and acoustic operation (using a battery).

Conducting properties of nearly depleted ZnO nanowire UV sensors fabricated by dielectrophoresis

2013 ◽  
Vol 24 (41) ◽  
pp. 415702 ◽  
Author(s):  
C García Núñez ◽  
A García Marín ◽  
P Nanterne ◽  
J Piqueras ◽  
P Kung ◽  
...  
Keyword(s):  
Zno Nanowire ◽  
Uv Sensors

scholarly journals Optical and photoelectrical properties of nanostructured thin ZnO films for UV-sensors

2017 ◽  
Vol 857 ◽  
pp. 012011 ◽  
Author(s):  
L V Grigoryev ◽  
S V Kulakov ◽  
V G Nefedov ◽  
O V Shakin ◽  
M L Grigoryeva ◽  
...  
Keyword(s):  
Zno Films ◽  
Photoelectrical Properties ◽  
Uv Sensors

scholarly journals Testing Wearable UV Sensors to Improve Sun Protection in Young Adults at an Outdoor Festival: Field Study

10.2196/21243 ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. e21243
Author(s):  
Caitlin Horsham ◽  
Jodie Antrobus ◽  
Catherine M Olsen ◽  
Helen Ford ◽  
David Abernethy ◽  
...  
Keyword(s):  
Skin Cancer ◽  
Field Study ◽  
Sun Exposure ◽  
Sun Protection ◽  
Incidence Rates ◽  
The Body ◽  
Childhood And Adolescence ◽  
Uv Sensor ◽  
Sunscreen Use ◽  
Uv Sensors

Background Australia and New Zealand have the highest skin cancer incidence rates worldwide, and sun exposure is the main risk factor for developing skin cancer. Sun exposure during childhood and adolescence is a critical factor in developing skin cancer later in life. Objective This study aims to test the effectiveness of wearable UV sensors to increase sun protection habits (SPH) and prevent sunburn in adolescents. Methods During the weeklong school leavers outdoor festival (November 2019) at the Gold Coast, Australia, registered attendees aged 15-19 years were recruited into the field study. Participants were provided with a wearable UV sensor and free sunscreen. The primary outcome was sun exposure practices using the SPH index. Secondary outcomes were self-reported sunburns, sunscreen use, and satisfaction with the wearable UV sensor. Results A total of 663 participants were enrolled in the study, and complete data were available for 188 participants (188/663, 28.4% response rate). Participants provided with a wearable UV sensor significantly improved their use of sunglasses (P=.004) and sunscreen use both on the face (P<.001) and on other parts of the body (P=.005). However, the use of long-sleeve shirts (P<.001) and the use of a hat (P<.001) decreased. During the study period, 31.4% (59/188) of the participants reported receiving one or more sunburns. Satisfaction with the wearable UV sensor was high, with 73.4% (138/188) of participants reporting the UV sensor was helpful to remind them to use sun protection. Conclusions Devices that target health behaviors when outdoors, such as wearable UV sensors, may improve use of sunscreen and sunglasses in adolescents.

Rutile TiO2 nanowire arrays interconnected with ZnO nanosheets for high performance electrochemical UV sensors

2019 ◽  
Vol 7 (26) ◽  
pp. 8011-8018 ◽  
Author(s):  
Youqing Wang ◽  
Lulu Chen ◽  
Hui Zhou ◽  
Kun Wei ◽  
Ziran Zhu ◽  
...  
Keyword(s):  
High Performance ◽  
Nanowire Arrays ◽  
Active Materials ◽  
Hierarchical Nanostructures ◽  
Rutile Tio2 ◽  
Tio2 Nanowire ◽  
Zno Nanosheets ◽  
Uv Sensors

Hierarchical nanostructures consisting of TiO2 nanowire arrays and ZnO nanosheets were prepared and investigated as active materials in photoelectrochemical UV sensors.

scholarly journals Selective growth of ZnO nanorods on microgap electrodes and their applications in UV sensors

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Qazi Humayun ◽  
Muhammad Kashif ◽  
Uda Hashim ◽  
Ahsanulhaq Qurashi
Keyword(s):  
Zno Nanorods ◽  
Selective Growth ◽  
Uv Sensors
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