检索结果-内蒙古大学图书馆

4th International Computational Imaging conference, CITA 2024

作者： Yang, Shijie Dai, Pan Ban, Qilu Wang, Yu Wang, Jiacheng Xu, Kaichuan Fan, Yaqiang Dong, Junwei He, Zilong Zhang, Yixin Wang, Feng Chen, Xiangfei Key Laboratory of Intelligent Optical Sensing and Manipulation The Ministry of Education & Engineering Research Center of Precision Photonics Integration and System Application The Ministry of Education National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Institute of Optical Communication Engineering Nanjing University Tongding Joint Lab for large-scale photonic integrated circuits Nanjing University Jiangsu Nanjing210093 China

ISBN: (纸本)9781510688834

Fiber Bragg grating (FBG) sensing technology, with the advantages of precise real-time monitoring and strong anti-interference capabilities, has been widely applied in various fields, including aerospace, petrochemical, and power transmission. This study presents an FBG sensing demodulation system applicable to high-capacity, high-density fiber sensing through quasi-distributed networking using multipoint FBG sensor arrays, capable of dense monitoring through multi-channel parallel operation and wavelength division multiplexing (WDM). The FBG sensing demodulation system primarily consists of a wavelength-swept semiconductor laser source and its parallel driving control module, a multiplexed FBG sensor array section, and a signal acquisition and demodulation module. The laser source is a distributed feedback (DFB) laser array, integrating 20 individual laser units at high density, based on the reconstruction-equivalent-chirp (REC) technique. A continuous coverage of wavelength tuning range, exceeding 40 nm in the C-band range, is achieved, with a maximum sweeping speed of 2.5 kHz and a tuning speed of 100,000 nm/s. The FBG sensor array section can deploy multiple non-identical WDM fiber grating arrays. The system can operate at high sweeping speeds of 1 kHz and 2.5 kHz, yielding great sensing results in temperature experiments, strain experiment and vibration experiment. The proposed FBG sensing system meets the application demands for high-capacity and dense quasi-distributed fiber sensing, exhibiting significant advantages in sensor load capacity, measurement precision, and especially measurement speed, with promising future applications. © 2025 SPIE.

关键词： Fiber Bragg gratings

来源：评论

学校读者我要写书评

暂无评论

Proceedings of SPIE: solid state sensor arrays: development and applications ii

Proceedings of SPIE: Solid State Sensor Arrays: Development ...

引用

solid state sensor arrays: development and applications ii

This Volume 3301 of the conference proceedings contains 21 papers. Topics discussed include new devices and technologies, X ray sensors and CMOS sensors.

关键词： sensors

来源：评论

学校读者我要写书评

暂无评论

35.2 A Spatial-Domain Compressive-Sensing Photoacoustic Imager with Matrix-Multiplying SAR ADC

35.2 A Spatial-Domain Compressive-Sensing Photoacoustic Imag...

引用

IEEE International conference on solid-state Circuits (ISSCC)

作者： Huan-Cheng Liao Shunyao Zhang Yumin Su Arvind Govinday Yiwei Zou Wei Wang Vivek Boominathan Ashok Veeraraghavan Lei Li Kaiyuan Yang Rice University Houston TX

ISBN: (数字)9798331541019

ISBN: (纸本)9798331541026

Wearable deep-tissue imaging technologies promise a paradigm shift to preventive, proactive, and accessible health care. Real-time and long-term imaging offers unprecedented insights into one's body conditions, enabling constant monitoring of high-risk patients (e.g., cardiovascular [1] and musculoskeletal [2]), tracking fetal development [3], and overseeing recovery after surgeries. These devices also make medical imaging more accessible and affordable in low-income countries. Ultrasound and photoacoustic (PA) imaging modalities are well suited for such applications because of their high resolution for imaging deep tissue and fewer safety concerns. Compared to the well-known ultrasound, emerging PA technology [4], [5] employs optical excitation and ultrasonic readout, governed by PA effects, to achieve higher molecular contrast and sensitivity based on the agents' optical absorption properties while offering similar depth and resolution. Thus, this work targets a compact and low-power PA RX with data compression as a key enabler of the envisioned wireless wearable PA imager. It is worth noting that PA and ultrasound RX share similar sensor arrays and readout circuits, except that the amplitude of received PA signals is roughly ten times smaller than that of ultrasound due to an extra stage of energy transduction and light exposure limits. Thus, we discuss and compare ultrasound and PA RX designs together in this paper.

关键词： Wireless communication Wireless sensor networks Ultrasonic imaging Image resolution Biomedical optical imaging Surgery Optical imaging solid state circuits Optical sensors Biomedical monitoring

来源：评论

学校读者我要写书评

暂无评论

20.4 MEMS-Free 4096-Pixel CMOS E-Nose Gas-sensor Array with Molecular-Selective Metal-Organic-Framework Sensing and In-Pixel Thermodynamic Modulation for Fast sensor Regeneration

20.4 MEMS-Free 4096-Pixel CMOS E-Nose Gas-Sensor Array with ...

引用

IEEE International conference on solid-state Circuits (ISSCC)

作者： Marco Saif Fuze Jiang Shao–Wei Lo Adam Wang Zhikai Huang Jiachen Wang Hangxing Liu Chih–Jen Shih Thomas Burger Hua Wang ETH Zürich Zürich Switzerland

ISBN: (数字)9798331541019

ISBN: (纸本)9798331541026

Accurate and real-time sensing of gas molecule species and concentrations is critical for a myriad of applications, including environmental protection, industry automation, public health monitoring, and bio-/chemical-security surveillance. For example, gas sensing in large chemical plants is crucial for safety and production efficiency, with ammonia (NH3) being particularly important due to its extensive use [1]. Electronic noses (e-noses) consist of a chemical sensor array with surface recognition modules for capturing specific or multi-species gas molecules followed by electronic signal acquisition and processing [2]. Despite decades of exploration [3]–[5], the development of e-noses is still in its early stages, and existing e-noses continue to face major challenges as: (1) limited selectivity on target molecules (2) poor sensor regeneration due to slow and incomplete gas desorption process, which can result in sensing memory effect, i.e., affecting low-trace gas detection due to prior exposure to high concentrations, (3) a small number of sensing nodes instead of a large array, also lacking in-pixel signal processing and data digitization [6], [7]. To address these issues, we present a monolithically integrated molecular specific metal-organic-frameworks (MOFs) CMOS e-nose sensor array with in-pixel fast capacitance-gas interfacing, readout, and data digitization with local temperature regulation and sensing. For demonstration, NiNi-Pyz MOFs have been employed to achieve NH3 specificity. In particular, the in-pixel temperature regulation can modulate the thermodynamic of NH 3 adsorption and desorption at the sensor interfaces, significantly improving the sensitivity and allowing rapid sensor regeneration.

关键词： Temperature sensors Thermodynamics Temperature distribution Array signal processing Surveillance Electronic noses Regulation sensors Surface treatment sensor arrays

来源：评论

学校读者我要写书评

暂无评论

Prototype of 2D direct x-ray a-SiN:H sensor array

Prototype of 2D direct x-ray a-SiN:H sensor array

引用

conference on solid state sensor arrays - development and applications ii

作者： Popov, IA Van Doorselaer, G Van Calster, A De Smet, H Callens, F Boesman, E State Univ Ghent B-9000 Ghent Belgium

ISBN: (纸本)0819427411

Study of the possible use of a-SIN: H thin films for 2D direct x-ray sensor arrays lead to the development of simple prototype. The sensor array is a 100x100 array of simple cross-over silicon rich a-SiN:H thin film diodes with sizes 200x200 mu m formed on a 2" glass substrate. There are neither switching elements nor x-ray conversion layer involved which leads to extremely simple 2 mask processing for the whole array. Specific behavior of the a-SiN:H sensing diodes under x-ray irradiation requires special attention to be paid to the driving strategy and read out electronics.

关键词： amorphous silicon active matrix TFD x-ray sensor

来源：评论

学校读者我要写书评

暂无评论

Versatile building-block architecture for large area, high performance CCD imagers

Versatile building-block architecture for large area, high p...

引用

conference on solid state sensor arrays - development and applications ii

作者： Theuwissen, A Beenhakkers, M Dillen, B Folkerts, HO Heyns, H Korthout, L Kreider, G Opmeer, P Peek, H Roks, E Rosner, H van der Sijde, A Vledder, F Philips Imaging Technol NL-5656 AA Eindhoven Netherlands

ISBN: (纸本)0819427411

A bouwblok (building-block) concept is described which allows one to fabricate several large area CCD image sensors from a single mask set. The size of the various imagers can differ both horizontally as well as vertically. The new method drastically reduces the development time and the associated cost of a new sensor. Because all imagers use of same basic pixel structure, the characteristics of new configurations can be fairly well predicted.

关键词： CCD imagers solid-state imaging modular concept mask stitching high performance imaging digital photography

来源：评论

学校读者我要写书评

暂无评论

Trends in the development of solid state amperometric and potentiometric high temperature sensors

引用

solid state IONICS 2000年第137期136卷 519-531页

作者： Göpel, W Reinhardt, G Rösch, M Univ Tubingen Inst Phys & Theoret Chem D-72076 Tubingen Germany Univ Tubingen Steinbeis Transfer Ctr Interface Anal & Sensors D-72076 Tubingen Germany

High temperature sensors based on solid electrolytes are well established in many applications. In this context. stabilized zirconia as an oxygen ion conductor plays the key role to monitor oxygen. Recent trends in the use of stabilized zirconia aim at the detection of other exhaust or environmental gases like NOx, CO or hydrocarbons. This is possible by, e.g. monitoring currents of specific electrode reactions at a given voltage ('amperometric devices') or monitoring voltages between different electrodes which result from specific electrode reactions including the kinetically determined formation of surface oxygen during different catalytic reactions ['mixed-potential (non-Nernstian) devices']. In all applications, the catalytic and electrochemical properties of the electrode materials play a key role for achieving reproducible sensor signals. This requires controlled microstructures down to the atomic scale. Therefore, extensive work now focuses on the structural as well as functional optimization of known, and on the development of new electrode materials. In this promising trend particular emphasis is put on the in-situ spectroscopic and microscopic characterization of the various interfaces under sensor operation conditions. (C) 2000 Elsevier Science B.V. All rights reserved.

关键词： stabilized zirconia amperometric sensors potentiometric sensors mixed potentials sensor arrays multi-component analysis interface analysis in-situ spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Modeling and estimation of FPN components in CMOS image sensors

Modeling and estimation of FPN components in CMOS image sens...

引用

conference on solid state sensor arrays - development and applications ii

作者： El Gamal, A Fowler, B Min, H Liu, XQ Stanford Univ Informat Syst Lab Stanford CA 94305 USA

ISBN: (纸本)0819427411

Fixed pattern noise (FPN) for a CCD sensor is modeled as a sample of a spatial white noise process. This model is, however, not adequate for characterizing FPN in CMOS sensors, since the readout circuitry of CMOS sensors and CCDs are very different. The paper presents a model for CMOS FPN as the sum of two components: a column and a pixel component. Each component is modeled by a first order isotropic autoregressive random process, and each component is assumed to be uncorrelated with the other. The parameters of the processes characterize each component of the FPN and the correlations between neighboring pixels and neighboring columns for a batch of sensors. We show how to estimate the model parameters from a set of measurements, and report estimates for 64x64 passive pixel sensor (PPS) and active pixel sensor (APS) test structures implemented in a 0.35 micron CMOS process. High spatial correlations between pixel components were measured for the PPS structures, and between the column components in both PPS and APS. The APS pixel components were uncorrelated.

关键词： CMOS image sensor fixed pattern noise nonuniformity image sensor characterization

来源：评论

学校读者我要写书评

暂无评论

Improving resolution of solid-state linear array X-Ray detectors

Improving resolution of solid-state linear array X-Ray detec...

引用

conference on solid state sensor arrays - development and applications ii

作者： Borras, G Odet, C Vuorinen, K Gaffiot, F Jacquemod, G Inst Natl Sci Appl CREATIS F-69621 Villeurbanne France

ISBN: (纸本)0819427411

Linear solid-state detectors are nowadays a widespread media in industrial and medical X-ray imaging. The resolution reached with this systems has been largely improved in this past years, but is still too poor for some high resolution applications. We first have carried out an optimization of the detector characteristics through a behavioral simulation using a Hardware Description Language (HDLA(TM)). Furthermore, our work concerned the resolution enhancement for this kind of detectors via signal processing. Our approach takes into account the modeled point spread function (PSF) of the system. This modeled PSF is obtained with a new edge technique. The knowledge about the system response is used in a restoration scheme in order to improve the response of the detector to the high frequencies in the digital image. The restoration problem is an ill posed problem and uses an inverse Wiener filtering. Another intrinsic limitation of solid-state detectors is the spatial sampling step. In order to overcome this problem, we also tested the feasibility of a finer sampling of the acquired image, by interlacing several slightly shifted acquisitions of the same test object. The restoration applied to this finer sampled signal results in a resolution enhancement that is theoretically impossible to reach with a single detector acquisition. Some experimental results obtained on a variable bar-space pattern phantom are presented. This kind of phantom allows for a precise evaluation of the Modulation Transfer Function (MTF) on the acquired and processed images. The contribution of the image processing to the resolution enhancement can thus be quantified.

关键词： simulation behavioral CCD X-ray MTF image restoration

来源：评论

学校读者我要写书评

暂无评论

A time delay and integration image sensor with high speed output architecture

A time delay and integration image sensor with high speed ou...

引用

conference on solid state sensor arrays - development and applications ii

作者： Weale, GP Flood, CJ Dykaar, DR DALSA Inc Waterloo ON N2V 2E9 Canada

ISBN: (纸本)0819427411

Today's imaging systems utilize fast operation to increase their throughput. At high line rates the illumination required to collect a reasonable image becomes prohibitive. Time delay and integration (TDI) offers greatly enhanced responsivity to allow faster operation in terms of line rates. This combination of sensitivity and speed is unmatched in other sensor architectures. The standard multi-stage source follower output amplifier usually involves a trade off between speed and sensitivity through sizing of the first FET. We present a high bandwidth (>250 MHz) and sensitivity (>5 mu V/e), scaleable architecture for readout of TDI sensors. A key component of this architecture is the minimization of output amplifier load and parasitic capacitance. The methodologies used in the design and modeling of the output structure will be presented. This basic model has been confirmed over a range of device dimensions. A 4096 element, multi-tap TDI image sensor incorporating this architecture has been fabricated using a standard CCD process. Discrete and in-camera measurements will be presented demonstrating operation at >100 kHz line rates and with >300 V/(mu J/cm(2)) peak responsivity. Methods of controlling and reducing the stray loading on the sensor output will also be discussed.

关键词： CCD charge coupled device high speed output TDI

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：