A Security UV Curing Device Based on LED Array

2014 ◽  
Vol 1037 ◽  
pp. 152-155
Author(s):  
Chuan Mei Bao ◽  
Chang Liang Liu ◽  
Chun Jun Li ◽  
Gu Chang Wang ◽  
Fei Gao ◽  
...  
Keyword(s):  
Signal Processing ◽  
Human Body ◽  
Integrated Circuit ◽  
Uv Curing ◽  
Constant Current ◽  
Constant Voltage ◽  
Pyroelectric Sensor ◽  
Uv Led ◽  
Led Array ◽  
Processing Signal

The study mentioned a curing equipment with UV LED array based on pyroelectric sensor and AP3706, which is based on the primary side control circuit so that it can complete the LED array constant voltage constant current output.the light source drive can output the constant voltage and constant current. The sensing signal processing signal integrated circuit BISS0001 as the pyroelectric sensor amplifier circuit as core, with relay making up the protection module of curing device. The experimental results show that, the curing equipment can realize the stable and homogeneous UV output, and when a human body in front of LED, the array will disabled to keep the human body away from damage UV induced.

Advanced LIVA/TIVA Techniques

2001 ◽  
Author(s):  
R. Aaron Falk
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Current Source ◽  
Fault Isolation ◽  
Constant Current ◽  
Voltage Source ◽  
Constant Voltage ◽  
Constant Current Source ◽  
Current Sensing ◽  
Order Of Magnitude

Abstract LIVA (L ight I nduced V oltage A lterations) and TIVA (T hermally I nduced V oltage A lterations) have demonstrated significant capability for fault isolation. A difficulty with both techniques is their use of a constant current source, whereas integrated circuits operate with a constant voltage source. A new technique that utilizes the constant current sensing of LIVA/TIVA, while allowing for use of constant voltage bias on the integrated circuit, has been developed. As a bonus, the technique is also significantly more sensitive (at least one order of magnitude) than the standard LIVA/TIVA approach.

HOMOGENITAS PRODUKSI BATERAI ION LITIUM BERDASARKAN VARIANS KAPASITAS PENGISIAN, KAPASITAS PELEPASAN DAN EFISIENSI PENGISIAN-PELEPASAN

2016 ◽  
Vol 6 (1) ◽  
pp. 35
Author(s):  
Daniel Fajar Puspita ◽  
Susanto Sigit Rahardi
Keyword(s):  
Constant Current ◽  
Constant Voltage ◽  
Constant Current Charging

Penelitian  mengenai  stabilisasi  produksi  baterai  ion  litium  berdasarkan  parameter  kapasitas  pengisian, kapasitas pelepasan  dan  efisiensi  pengisian-pelepasan  telah  dilakukan. Tujuan  dari penelitian  ini adalah  untuk mengetahui apakah prosedur pembuatan baterai ion litium ini dapat menghasilkan produk yang homogen. Pada penelitian material selanjutnya hal ini berguna untuk meyakinkan bahwa perubahan kualitas   dari produk baterai yang dihasilkan merupakan pengaruh dari material, bukan karena variabel proses perakitan. Pada penelitian ini dipakai lembaran elektroda siap pakai untuk meniadakan pengaruh variasi bahan baku terhadap kualitas sel baterai yang dihasilkan. Sel baterai dibuat di laboratorium riset baterai B4T. Baterai dibuat sebanyak 3 batch dengan jumlah baterai 8 buah setiap batch. Baterai yang dihasilkan diuji dengan alat battery analyzer merek Berkeley buatan USA dengan arus 0,5 C pada saat constant-current charging dan voltase 4,2 V sewaktu constant-voltage charging selama 10 siklus pada saat uji kinerja  dan arus 0,1 C pada saat pengisian  awal.  Hasil yang didapat adalah  batch C menghasilkan sel-sel baterai yang lebih homogen yang ditandai dengan nilai varians dan simpangan baku yang paling kecil dibandingkan batch lainnya.  Selain itu pada saat uji pengisian-pelepasan  10 siklus, batch C juga memperlihatkan kinerja yang lebih tinggi. Hal ini menunjukkan bahwa proses yang dipakai pada batch C dapat menghasilkan sel baterai ion litium berkinerja baik dan homogen.Kata kunci: stabilisasi produksi, ion litium, kapasitas, efisiensi

Advanced readout integrated circuit signal processing

2006 ◽  
Author(s):  
Allen Hairston ◽  
James Stobie ◽  
Rosanne Tinkler
Keyword(s):  
Signal Processing ◽  
Integrated Circuit ◽  
Readout Integrated Circuit

Variable Parameter Processes of Micro-Arc Oxidation for Aluminium Alloy

2011 ◽  
Vol 704-705 ◽  
pp. 1273-1278
Author(s):  
Cheng Gao ◽  
Jin Yong Xu ◽  
Xuan Yi Shi ◽  
Ya Juan Liu ◽  
Jing Chun Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Wear Rate ◽  
Ceramic Coating ◽  
Early Stage ◽  
Variable Parameter ◽  
Ceramic Coatings ◽  
Constant Current ◽  
Constant Voltage ◽  
Micro Arc Oxidation ◽  
The Way

In micro-arc oxidation process, ceramic coating had a rapid growth all along by the way of constant current oxidation, and ceramic coating had a low roughness by the way of constant voltage oxidation. But few research focus on the mixed control process of constant current oxidation and constant voltage oxidation. In this paper we propose a variable parameter process that can combine the advantages of constant current and constant voltage oxidation for the first time. The growth kinetics of different technics was analyzed according to the change law of current and voltage. Surface topographs of ceramic coating were observed using scanning electron microscopy (SEM). The friction tests were carried out using a self-made friction tester. The results show that ceramic coating has an upper growth rate and a low roughness by the process of constant current+constant voltage oxidation. The ceramic coating has a high growth rate by process of constant voltage+constant current oxidation. The results of friction test indicate that the wear rate and roughness of ceramic coating are positive correlation at early stage of friction. While the ceramic coatings treated by different technics have the close wear rate at stable friction stage, which embodies the inner layer of ceramic coating has a well antiwear behavior.

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