1 edition of Sensors for harsh environments III found in the catalog.
Sensors for harsh environments III
Includes bibliographical references and author index.
|Statement||Hai Xiao, Anbo Wang, editors ; sponsored and published by SPIE--the International Society for Optical Engineering|
|Series||Proceedings of SPIE -- v. 6757, Proceedings of SPIE--the International Society for Optical Engineering -- v. 6757.|
|Contributions||Society of Photo-optical Instrumentation Engineers|
|LC Classifications||TA1815 .S473 2007|
|The Physical Object|
|Pagination||1 v. (various pagings) :|
|LC Control Number||2010287114|
Design Consideration of SiC Wireless Module The first step of constructing the harsh environment wireless pressure sensing system is to identify what type of the pressure sensing element should be used. So we must research the relationship between the sensor nodes' deployment and the system's power efficient. Food and Other Industries Make Specialized Sensor Demands By Control Design Staff Mar 24, Turning to capture growing markets with harsh environments, manufacturers are creating a new breed of sensor with the operating temperatures, materials and functionality that make them more rugged. However, the testing environment is usually harsh. The temperature dependence of the optical properties was found to be reversible, which indicates that the temperature transducer is reversible as well.
Detailed circuit design of this SiC wireless module is illustrated in Section 3. Pressure measurement based on piezoelectric crystal resonators has advantages over the commercially available methods like capacitive, electromagnetic, optical, potentiometric, and piezo resistive strain gauges. As currently implemented, during massive losses of power across the plant in accidents, the backup batteries for the monitoring sensors will ultimately be drained and can cease to operate. The design and optimization of the radiation shielding systems that can effective protect the duel-mode Langasite sensor inside reactor core were demonstrated. Aguiar; Claudionor Chaves Show Abstract Frequently, assessment and monitoring of mechanical acoustic vibrations is necessary in large structures. For another, the test process is not trivial and inconvenient for real-time modulus monitoring.
Evacuation of the sensor's cavity eliminates the thermally induced inner pressure changes which is a common problem in pressure sensors and therefore improves the accuracy and repeatability. This dissertation presents detailed research work on the design, modeling, implementation, analysis, and performance evaluation of novel optical high temperature sensors suitable for harsh environment applications. Therefore, the resonating frequency of the LC resonator is pressure-dependent and can be detected remotely by measuring the impedance of an inductively coupled antenna as a function of frequency [ 4950 ]. Pressure measurement based on piezoelectric crystal resonators has advantages over the commercially available methods like capacitive, electromagnetic, optical, potentiometric, and piezo resistive strain gauges. The temperature and strain can be detected simultaneously by matrix inversion.
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The sensor features miniature size Author s : F. Pickrell ; Kristie L. We analyze the geometric effects of tubular and pinhole collimators and the effects of curved shields for the case of omni-directional fluxes. The burgeoning food and beverage industry, for example, is attracting more attention from suppliers.
Author s : N. Since wavelet transform can accurately localize sensor signal characteristics both in time and frequency domain, it is very suitable for non-stationary signal analysis. Author s : Juncheng Xu ; Gary R. Existing high temperature sensing devices are briefly introduced in this section, which include high temperature thermocouples, high temperature optical sensors, high temperature surface acoustic sensors SAWas well as the RF powered LC sensors.
The investigation into the piezoresistive effect in 3C-SiC is of significant interest for the development of mechanical transducers such as pressure sensors and strain sensors used for controlling combustion and deep well drilling. Some tests we made in vibration and acceleration were representative of the different phase of the life cycle of these instruments in a ballistic flight environment.
The development of sensor faults diagnose technology offers strong guarantee for using the sensor reliably. The hydrothermal synthesis process was controlled by continuously monitoring the LPFG transmission spectrum evolution, which indicated the zeolite film formation and growth process.
In order for the ground processing software to extract individual emission features from the measured spectra, the data must be filtered for quality and the noise must be characterized on short time scales and introduced as additional basis functions for use with the Multiple Linear Regression MLR feature extraction algorithm.
Through a large amount of simulated examples it indicates that the sensors fault diagnosis method based on the theory of wavelet has characteristic such as good sensitivity, high accuracy rate and robust ability to overcome noise.
Biochemical sensor is one of the most attractive fields of sensor research, especially with the development and occurrence of all kinds of novel theory and technology such as LPG.
This paper presents a comparison of two fiber optic sensing schemes which are demonstrated for the detection of acetylene and carbon monoxide.
Cooper; Gary R. In some hostile environments, they have a limited life of only a few days because of their susceptibility to attack from corrosive chemicals. Nowadays there are many types of pressure sensing technologies for different applications, such as capacitive pressure sensors that utilize a diaphragm and a pressure cavity to create a variable capacitance [ 10 — 13 ]; piezoelectric pressure sensors that utilize the piezoelectric effect in some materials to measure the strain caused by pressure [ 14 — 18 ]; surface acoustic wave SAW pressure sensors that utilize the phase velocity variation of surface acoustic wave on piezoelectric substrate when pressure is applied [ 19 — 23 ]; optical pressure sensors in which the characteristics of optical signal such as intensity, polarization, phase or spectrum are modulated by the pressure stimulus [ 24 — 29 ]; and the most commonly used piezoresistive pressure sensors, for which the resistance of the piezoresistive material can be altered by the pressure applied on it [ 30 — 34 ].
By bending the ELPG, because the different bending curvature yields the different coupling strength, it is used for the dynamic gain flattening despite the different pump power on the EDFA. The complex refractive index of the metal outer clad make the transfer constant to be a complex number.
The main existing techniques for optical thermometry measure temperatures by detecting the thermal radiation emitted by the object [ 6 ] or the change in optical path length of a short piece of material whose thermal expansion coefficient and refractive index change as a function of temperature [ 7 ]; or by detecting the decay time or intensity of a UV stimulated visible fluorescence pulse, which is temperature dependent [ 8 ], or based on temperature dependent optical scatterings [ 9 ].
While the dual-FBG based sensor is based on electrical beating of modulated radio-frequency RF signals reflected from the two FBGs, which act as the sensing element and reference respectively.Pressure measurement under harsh environments, especially at high temperatures, is of great interest to many industries.
The applicability of current pressure sensing technologies in extreme environments is limited by the embedded electronics which cannot survive beyond Cited by: Sep 20, · On the contrary, back-side entry uncovers only the eutectic die attach, glass and silicon to the pressure medium—elements that have been proven to withstand these harsh environments.
Merit Sensor harsh-media, extended-temperature sensors are available with optional ferrule (left), polycarbonate pressure ports (middle) for radial Author: Merit Sensor. acceleration and flow are essential for many harsh environment applications.
We define harsh environment as any environment such as high pressure, high temperature, corrosive and erosive nature that can hinder the operation of the device.
Figure 1(a) represents various MEMS sensors and the associated harsh environment sylvaindez.com by: Telaire T Series is a range of Carbon Dioxide (CO2) Sensors designed to meet the specific needs of customers who require measuring CO2 in harsh or difficult environments.
Based on a series of modules, the casing offers a number of combinations to meet the needs of range, supply voltage, and output type in various applications. May 22, · A capacitive differential pressure sensor for the pressure range of 0–1 bar has been developed.
The primary field of application is hydrodynamic flow measurements in hot petroleum wells. In these harsh environments the sensor has to survive high common mode pressure in the range of bar and temperatures up to °sylvaindez.com by: However, the development of the RF powered LC temperature sensor hasn't been demonstrated so far for harsh environment application up to °C.
In this paper, a novel RF powered LC temperature sensor is developed, capable of operating in harsh environments for Cited by: