SENSORS, 2002 IEEE
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
Experimental evaluation of differential thermal errors in magnetoelastic stress sensors for Re<180
SENSORS, 2002 IEEE - Tập 2 - Trang 810-817 vol.2
In this paper we discuss laboratory results from solenoidal magnetoelastic measurements performed on a sample of bridge suspension cable. The experiments were designed to answer basic questions regarding the potential effects of inhomogeneous temperature fields and differential thermal errors between sensor and sample on the accuracy of coercive force measurements. The experiments were conducted w...... hiện toàn bộ
#Thermal stresses #Magnetic sensors #Thermal sensors #Temperature sensors #Magnetic field measurement #Cable shielding #Magnetic levitation #Coercive force #Temperature measurement #Heat transfer
ARROW-based optical accelerometers
SENSORS, 2002 IEEE - Tập 2 - Trang 1075-1079 vol.2
Design, fabrication and characterization of silicon-based stress-free self-aligned quad beam accelerometer is presented. Standard total internal reflection waveguides have been replaced by ARROW structures, enhancing the sensitivity to >4dB/g at the wavelength visible range (633nm) Moreover, as the waveguide core has approximately the same size as the input fiber optic, insertion losses have been ...... hiện toàn bộ
#Accelerometers #Optical waveguides #Optical sensors #Optical attenuators #Electromagnetic waveguides #Optical films #Optical losses #Optical refraction #Integrated optics #Silicon
Practical diffraction-limited angle sensitive detectors
SENSORS, 2002 IEEE - Tập 1 - Trang 121-125 vol.1
In this paper, we study a simple angle-sensitive detector for sensing optical beam deflections. This type of device is sought to replace position sensitive detectors commonly used with optical beam deflection techniques in a variety of applications. The main advantage is that the sensitivity is independent of the distance from the deflection point to the detector. To our knowledge this is the firs...... hiện toàn bộ
#Optical beams #Optical diffraction #Optical detectors #Position sensitive particle detectors #Optical design #Laser beams #Optical reflection #Optical polarization #Temperature dependence #Optical device fabrication
OMNIVIEWS: direct omnidirectional imaging based on a retina-like sensor
SENSORS, 2002 IEEE - Tập 1 - Trang 27-30 vol.1
Traditionally the acquisition of real time panoramic images has been performed by the usage of lenses or mirrors coupled with standard image sensors, which give distorted images. In this paper we will present a system composed of a mirror and a log polar sensor, which is able to provide directly understandable images.
#Image sensors #Cameras #Mirrors #Lenses #Optical distortion #Surveillance #Intelligent sensors #Navigation #Optical sensors #Hardware
Precise calculation of capacitances of complex-shaped capacitive sensor-elements by the method of direct field-strength determination
SENSORS, 2002 IEEE - Tập 2 - Trang 1239-1243 vol.2
The method of direct field-strength determination, in combination with the method of conformal mapping, explained in this paper, is elegantly applied for precise analytical calculation of the capacitances of complex-shaped systems of electrodes. Because of the analogy of mathematical formulations, this method can be also applied for calculation of stationary magnetic, electrical and thermal fields...... hiện toàn bộ
#Capacitance #Electrodes #Permittivity #Conductive films #Insulation #Low voltage #Electrostatics #Equations #Capacitive sensors #Shape
Fiber optic sensing of tissue pH to assess low blood flow states
SENSORS, 2002 IEEE - Tập 1 - Trang 266-269 vol.1
Tissue pH is a regional measure of anaerobic metabolism and low blood flow state that can be measured using near infrared (NIR) spectroscopy (700 - 1100 nm). NIR light passes through the skin to probe muscle and tissue at depths of 5 - 10 mm. We have used a fiber optic probe to collect light both through skin and directly from internal organs during surgical procedures, to investigate the measurem...... hiện toàn bộ
#Optical fibers #Blood flow #Fluid flow measurement #Skin #Probes #Optical saturation #Optical sensors #Biochemistry #Infrared spectra #Spectroscopy
A CMOS smart pixel for active 3D vision applications
SENSORS, 2002 IEEE - Tập 1 - Trang 11-14 vol.1
Fast collection of three-dimensional (3D) data sets is required in a growing number of applications like robotic guidance, security and automotive. Scannerless time-of-flight (TOF) based active 3D vision systems are capable of collecting depth profiles of entire scenes in fractions of seconds but have the disadvantage of using high voltage and expensive electronic components. In this contribution ...... hiện toàn bộ
#Smart pixels #CMOS technology #Robots #Data security #Automotive engineering #Machine vision #Layout #Voltage #Electronic components #Testing
Enhancement of the low temperature response of thin film gas sensors by UV irradiation
SENSORS, 2002 IEEE - Tập 1 - Trang 613-616 vol.1
In this work we present recent results regarding the activation of sensors with high power density light with energy in the range of the energy gap of the semiconductor. We report the measurements registered for tin oxide RGTO deposited layers using CO as a target gas. The influence of the doping on the activated gas sensing properties has been investigated. We have found the value of the incident...... hiện toàn bộ
#Temperature sensors #Thin film sensors #Gas detectors #Tin #Kinetic theory #Pollution #Lattices #Optical sensors #Crystalline materials #Grain boundaries
Studies of semitransparent optoelectronic position sensors
SENSORS, 2002 IEEE - Tập 2 - Trang 829-835 vol.2
Novel semitransparent optoelectronic position sensors, the 'ALMY sensors,' have been developed for high-precision multi-point position and angle measurements of collimated laser beams over a large measurement range. The sensors consist of a thin film of amorphous silicon deposited on a glass substrate between two transparent layers of crossed strip electrodes. They provide a position resolution on...... hiện toàn bộ
#Optoelectronic and photonic sensors #Amorphous silicon #Position measurement #Thin film sensors #Laser stability #Lighting #Goniometers #Collimators #Laser beams #Semiconductor thin films
Local discriminant bases and optimized wavelet to classify ultrasonic echoes: application to indoor mobile robotics
SENSORS, 2002 IEEE - Tập 2 - Trang 1654-1659 vol.2
To localize a robot in an indoor environment, ultrasonic sensors are used. Our aim is to show we can classify targets into four classes (edges, corner, plane, small cylinder) using the whole information in the received echo. However, to classify received echoes we need to extract features from raw data. The extracted features must be discriminant to improve the classifier results. The selection of...... hiện toàn bộ
#Feature extraction #Data mining #Ultrasonic transducers #Mobile robots #Indoor environments #Wavelet packets #Acoustic transducers #Robot sensing systems #Frequency #Sensor phenomena and characterization
Tổng số: 352
- 1
- 2
- 3
- 4
- 5
- 6
- 10