Current Sensor Articles | Environmental XPRT

Improving load regulation in current mode control through inductor current filtering

Current mode control (CMC) though offers improved line regulation, phase margin and high bandwidth suffers from high output impedance. Although load regulation can be improved by incorporating an integral gain, it reduces the phase margin and increases the overshoot. The objective of this paper is to achieve improved output impedance without using an integral controller. Incorporating a high pass ...

Dec. 12, 2011

By Inderscience Publishers

The role of nanotechnology in diabetes treatment: current and future perspectives

Diabetes is a chronic disease that currently affects approximately 8% of the US population, and that number is expected to increase significantly by the year 2030. It is imperative that effective monitoring and treatment options be available to patients. Nanotechnology is a focal point in diabetes research, where nanoparticles in particular are showing great promise in improving the treatment and ...

Dec. 3, 2010

By Inderscience Publishers

Current advances in sustainable Metalworking Fluids research

Metalworking Fluids (MWFs) have a history of harming the environment and the health of workers, resulting in pressures to re-design them in accordance with sustainable manufacturing principles. In this paper, we review research being performed at the University of Michigan to minimise the life cycle environmental and health impacts of MWFs while simultaneously improving manufacturing performance. ...

Jul. 3, 2008

By Inderscience Publishers

Response time testing of temperature sensors using loop current step response method

The Loop Current Step Response (LCSR) method is used for in–situ response time testing of temperature sensors as installed in an industrial process. This paper presents the theoretical foundation of the LCSR (test theory, LCSR equation and test procedures) and the author's research to validate its use in nuclear power industry applications. The validity of the LCSR method depends on how ...

Feb. 20, 2013

By Inderscience Publishers

Environmental Sensors in Waste Management

Issue: As part of an increasing sentiment among European consumers that environmental protection is important, concern about the impact of landfill is growing. Sensor technology makes it possible to measure and control inputs to landfill sites and pollutants arising from them. However, the exploitation - or uptake - of such technology has been lower than expected in the waste management sector. ...

Jan. 1, 1999

Sensor data processing for emergency response

A gap with current Emergency Response (ER) is the lack of real-time information on the status of an incident. Wireless sensor networks have shown great potential in addressing this gap. However, sensor data streams often contain 'noise', thus they are too difficult to be directly interpreted. In addition, sensor data are often meaningless unless it is associated with time and location ...

Nov. 22, 2010

By Inderscience Publishers

BLOOM Wastewater Sensor - Case Study

Water is an integral input and vital strategic resource for the Ontario Food and Beverage Processing Sector. Water plays a variety of diverse and convergent functions. It is used for heating and cooling, blending, washing and rinsing, convey- ing, cleaning and sanitation – as well as being a vital product ingredient. However, the use of water inevitably leads to the generation of wastewater ...

Jul. 20, 2016

By MANTECH Inc.

Neural network-based shunt active filter with direct current control for power quality conditioning

In this paper, a novel phase locked loop less control algorithm for harmonic and reactive power compensation with power factor improvement using three-phase shunt active power filter under non-ideal mains voltage conditions is presented. The performance of APF mainly depends upon how quickly and accurately compensation signal are estimated. The artificial neural network trained with conventional ...

Oct. 5, 2011

By Inderscience Publishers

Determining the Right Cable Length and Output for a Sensor

If you’re monitoring a bridge or automating a machine, a high precision sensor is a great solution, but it’s no good if the output signal can’t reach the data logger. Depending on what you need to measure and what environment you’re in, determining how long your cable must run can be crucial. High precision sensors offer three common output types: analog, digital and ...

Feb. 28, 2017

By Jewell Instruments LLC

Towards practicable sensors using one-dimensional nanostructures

Nanomaterials, including nanoparticles, nanowires, nanotubes etc., are the object of much well deserving attention by researchers and the public alike. Because of their novel properties associated with their typically large surface to volume ratios and finite- or quantum-size effects, they offer an avenue of exploration for new and interesting physics, chemistry, biology and materials science. ...

Mar. 10, 2008

By Inderscience Publishers

Lifesaving weather warnings thanks to professional visibility sensors

The new Lufft visibility sensor VS20k is now officially available. But what distinguishes it from the previous model and for which applications is it suitable? In the following article, you learn more about the new Lufft visibility sensor family… Reduced visibility – a risk for all traffic users Traffic accidents, flight cancellations and delays: Reduced visibility is ...

May 19, 2017

By G. Lufft Mess- und Regeltechnik GmbH

Ultrasonic depth sensor to measure water levels

The Dutch algae control company LG Sonic introduced an ultrasonic depth sensor to give the customers real-time insight in the water levels which allows them to adequately deal with water level fluctuations. Reservoirs used for industrial processes or the production of drinking water often deal with strong water level fluctuations. Due to events of high demand and evaporation, water levels in ...

Feb. 3, 2017

By LG Sonic

A blind estimation of speed and rotor position of permanent magnet synchronous motor from the measurements of stator currents using extended Kalman filter

A number of techniques have been developed for estimation of speed or rotor position in motor drives. In this paper, an extended Kalman filter (EKF) is developed for the estimation of speed and rotor position using only the measurements of three phase stator currents. Conventional mechanical sensors are not needed for this estimation. The paper proposes the modelling of the dynamic equations of ...

Aug. 5, 2013

By Inderscience Publishers

Acoustic Doppler Current Profiler measurements near a weir with fish pass: assessing solutions to compass errors, spatial data referencing and spatial flow heterogeneity

There has been an increasing interest in the use of Acoustic Doppler Current Profilers (ADCPs) to characterise the hydraulic conditions near river engineering structures such as dams, fish passes and groins, as part of ecological and hydromorphological assessments. However, such ADCP applications can be limited by compass errors, obstructed view to navigation satellites, frequent loss of ...

Nov. 18, 2015

By IWA Publishing

Online discharge measurement with horizontal doppler-flow sensor

Background The regional authority responsible for the barrages in the Free State of Saxony is in charge of the water management of the Rötha. Reservoir. This reservoir is situated close to the river Pleiße, from which the water is led over a weir into the reservoir.. Knowledge about the inflows of the reservoir is important for the water management there. So far, the ...

May 6, 2010

By The OTT Hydromet Group

Upgrading from Pellistor Gas Sensors to Infrared Technology

In this article Andy Avenell, Crowcon’s Fixed Systems Product Manager, considers the shift towards infrared (IR) gas sensor technology in the oil and gas industry. Abstract Flammable gases and vapours can present considerable dangers in many industrial applications, none more so than the processes involved in extracting, transporting and processing oil and gas. Fast and reliable ...

Feb. 1, 2010

By Crowcon Detection Instruments Ltd - a Halma company

Sensor Setpoint Validation of Reclaimed Water UV Reactors

ABSTRACTReclaimed water ultraviolet light (UV) disinfection system can be a critical component of a multiple barrier approach for public health protection. Current control methodologies rely upon assumed end of lamp life factors and sleeve fouling factors, which often result in overdosing when the lamps are new and the sleeves are clean and underdosing as the lamps ...

Oct. 22, 2006

By Water Environment Federation (WEF)

A Multi-Sensor Piezometer for Shallow Marine Sediments in Coastal Environments

A multi-sensor piezometer has been developed to measure dynamic excess and ambient pore pressures in shallow marine sediments under the effect of surface waves, tides, and currents. The probe consists of a shaft (1.5 m long with five porous stones at subseafloor depths ranging from 0.10 to 0.93 m) and two upper chambers (one that is hermetically sealed for the transducer electronics and another ...

Dec. 1, 1996

By ASTM International

Sulfite Detection in Food Liquids (Beverages) with a Microdisk Array Sensor

The use of a microdisk array sensor for amperometric determination of free and total sulfite in beverages was evaluated. Model solutions resulted in good sensitivity (~1 ppm) and linearity (0-120 ppm) for free SO2. In must, wine or vinegars a non-negligible residual current was observed but a good correlation between sensor response and added sulfite was obtained. Preliminary results ...

Jan. 1, 2004

Innovation in Security will be Driven by Sensor Ubiquity, Smarter Devices & Cloud Technology

Continuing our series of articles on Innovation we talked to Steve Russell, CEO of Prism Skylabs, about how they intend to disrupt the Security Market in 2013 and what he thinks will be the major innovations over the next 5 years. Q. Where will the major innovations in the security industry come from in the next 5 years? A. Over the next 5 years, there will be a number of ...

Jan. 14, 2013

By Memoori Business Intelligence Ltd

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