2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)最新文献_第4页

Modelling and simulation of a miniaturized gyrometer 小型陀螺仪的建模与仿真

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220104

T. Grigorie, P. Negrea, Florentina Cirstea

引用次数: 0

Hydrogen sensing properties of antimony doped tin dioxide based taguchi type gas sensor: Effect of palladium 锑掺杂二氧化锡田口型气体传感器的氢传感性能:钯的影响

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220117

Pratanu Nag, P. Devi

引用次数: 0

Non-return microvalve using low temperature co-fired ceramic (LTCC) 低温共烧陶瓷(LTCC)止回微阀

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220131

Mayur Devrukhakar, Mangesh Dayaphule, Varsha Chaware, V. Giramkar, S. Joseph, G. Phatak

{"title":"Non-return microvalve using low temperature co-fired ceramic (LTCC)","authors":"Mayur Devrukhakar, Mangesh Dayaphule, Varsha Chaware, V. Giramkar, S. Joseph, G. Phatak","doi":"10.1109/ISPTS.2015.7220131","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220131","url":null,"abstract":"LTCC is a known suitable platform for microfluidic systems. We have developed actuation-less non-return valve for gases and liquids, which is based upon the inlet and reverse pressure. This work compares three different designs of such valves. In these designs, top lid and bottom cavity layer together forms micro fluidic channel, through which fluid or gas can flow. The pressure based movable ceramic part and the matching cavity at the inlet plays an important role in the valve designs. The designs are such that the liquid or gas flows from inlet to outlet without any difficulty. However, if the liquid or gas flows in reverse direction (i.e. from outlet to inlet) the movable part blocks the path at the cavity and opposes the liquid or gas flow through the channel. Two designs are based upon vertical motion of the movable ceramic part and has a `O' ring to rest to movable part at the inlet side. One of these designs usesZirconia (ZrO2) ball (design 2) while another has square shape (design 3) as the movable parts. Yet another design (design 1) is based upon sliding motion and teflon coating for lubrication. The initial testing using pressurised air (up to 6 bar) indicated that the reverse direction blockade is the best for design 2, which has shown leak rate of 3 ml min-1 at 6bar pressure. This is followed by design 3 and by design 1, which have shown leak rates of 30 ml min-1 and 100ml min-1 respectively.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"5 1","pages":"289-292"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82297503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of video processor for multi-head star sensor 多头星敏感器视频处理器的设计

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220082

Sudha Bendapudi, G. K. Kashyap, M. G. Lithin, M. Subhajit, B. Krishnamprasad, T. H. Shashikala

{"title":"Design of video processor for multi-head star sensor","authors":"Sudha Bendapudi, G. K. Kashyap, M. G. Lithin, M. Subhajit, B. Krishnamprasad, T. H. Shashikala","doi":"10.1109/ISPTS.2015.7220082","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220082","url":null,"abstract":"Star Sensor, also known as star-tracker, is a high-accuracy 3-axis attitude sensor used onboard spacecrafts. It processes stars from a sky image captured using an area imaging detector (generally 1k × 1k pixels Charge Coupled Device) to generate attitude information. Its accuracy about the boresight is poorer than about the cross-axes. This is improved by using two sensor heads with staggered Fields-Of-View (FOVs) and three to avoid break during occultation of any head. All the sensor heads have identical processing operations. So, the Processing Unit (PU) is made common. This minimizes the system electronics, power consumption and also thermal dissipation on each CH, allowing more efficient cooling of CCD and improving sensor performance. The resulting multiple Camera Heads (CHs) are operated remotely by the common PU. Thus, a programmable Video Processor (VP) is designed for the CH as an efficient data acquisition co-processor to the PU. The VP works in parallel freeing PU for attitude computation from the data acquired from multiple CHs. VP acquires CCD images and pre-processes them to reduce data size, speeding up PU processing. It is programmable for different modes of operation based on full-frame star-search or Region-of-Interest (ROI) readout, thereby providing flexibility, while maintaining rigidity in implementation as required by CCD. Communication of the VP with the PU is configured via low-power high-speed SpaceWire link. The VP is implemented in a low-power FPGA. All instruction and data storage is on-chip.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"98 1","pages":"59-62"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79482109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Design and simulation of blocked blood vessel for early detection of heart diseases 用于心脏疾病早期检测的血管阻塞设计与仿真

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220113

Apoorva Garje, Y. Adhav, D. Bodas

引用次数: 9

Synthesis of nanocrystalline silicon carbide thin films by HW-CVD using ethane carbon precursor for photo detector application 以乙烷碳为前驱体，HW-CVD法合成纳米晶碳化硅薄膜

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220089

Amit Pawbake, V. Waman, R. Waykar, A. Mayabadi, R. Kulkarni, H. Pathan, S. Jadkar

引用次数: 1

PT04. III-V Compound semiconductors based quantum structures for IR detection PT04。基于化合物半导体的红外探测量子结构

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220160

S. .. Krupanidhi

{"title":"PT04. III-V Compound semiconductors based quantum structures for IR detection","authors":"S. .. Krupanidhi","doi":"10.1109/ISPTS.2015.7220160","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220160","url":null,"abstract":"Long-wavelength infrared (LWIR) detectors are important in many different applications such as space surveillance systems, low-background infrared seeker-tracker systems, remote environmental monitoring, remote analysis of gases in outer space, and remote temperature measurement. One primary concern with producing LWIR detectors is that they must be made with a material having an energy band gap small enough to allow electrons to be excited from the valence band to the conduction band by the infrared radiation. However, the lowest band gap of the III-V material family is InSb (Eg= 0.174 eV @ 300 K), which corresponds to a wavelength of about 7.1 μm. This makes it difficult to fabricate a long-wavelength (8-14 μm) detector from a bulk III-V material. One way to approach is to make use of quantum wells (QWs) grown in the III-V material family. A QW is made when a thin layer of small band gap material is sandwiched between materials that have a higher band gap. This higher band gap material is called the barrier, where as the lower band gap material is called the well. If the well is thin enough and deep enough, then instead of a continuum of allowed states like those in the conduction band of a bulk semiconductor, a few discrete states are formed in the well. The number of discrete states that are formed depend on the physical and material properties of the well and barrier. Present talk deals with the development of Quantum wells and Dots of GaAs for efficient IR detection.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"27 1","pages":"iv-iv"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83053058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of planar first order gradiometer coupled to HTS SQUID sensor 与HTS SQUID传感器耦合的平面一阶梯度仪的研制

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220136

L. S. Vaidhyanathan, D. K. Baisnab, R. Baskaran, M. Janawadkar

引用次数: 0

Ga doped hematite (α-Fe2O3): A promising magnetic sensor material 掺Ga赤铁矿(α-Fe2O3):一种很有前途的磁传感器材料

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220074

R. Bhowmik, A. G. Lone, G. Vijayasri

引用次数: 2

Organic acids assisted hydrothermal synthesis of WO3 nanoplates and their gas sensing properties 有机酸辅助水热合成WO3纳米片及其气敏性能

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI: 10.1109/ISPTS.2015.7220100

S. Mehta, S. S. Suryavanshi, I. S. Mulla

{"title":"Organic acids assisted hydrothermal synthesis of WO3 nanoplates and their gas sensing properties","authors":"S. Mehta, S. S. Suryavanshi, I. S. Mulla","doi":"10.1109/ISPTS.2015.7220100","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220100","url":null,"abstract":"Tungsten oxide is amongst the most widely used materials in electro-, photo-chromic applications. Recently tungsten oxide has been employed as sensing layer for detection of hazardous gases. In this work, we report synthesis of WO3 nanoparticles via a facile hydrothermal method using sodium tungstate and different organic acids (viz. citric acid, oxalic acid, malonic acid, and (L+) tartaric acid). We have investigated the effect/role of organic acid on the morphology and gas sensing properties. The X-ray diffraction (XRD) studies confirmed that citric acid and oxalic acid assisted routes give monoclinic structure (m-WO3) while malonic acid and (L+) tartaric acid give hexagonal structure (h-WO3). The nanoplate-like morphology was revealed by Scanning electron microscopy (SEM) analysis. The thick film of WO3 powder was deposited by using a screen printing technique. The gas response of thick films fired at 400°C/2h was studied. The change in the gas response of WO3 nanoplates for various concentrations and operating temperatures were studied for NOX, acetone, ethanol and ammonia vapors. In general, we observed response towards acetone, ethanol and ammonia vapors at higher operating temperature. However, the citric acid, oxalic acid and tartaric acid assisted WO3 exhibited good response for NOX at lower operating temperature (from 80°C-200°C). The gas response studies revealed that WO3 synthesized by citric acid assisted route exhibits highest sensitivity (S=77%) at 130°C towards NOX gas.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"1 1","pages":"142-146"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87078430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1