Article

A Thermistor Nomograph for a Three-Point Fit

September 1984
IEEE Circuits & Systems Magazine 6(3):3-10

DOI:10.1109/MCAS.1984.6323946

Authors:

A description is given of a nomograph which has been designed to determine all thermistor three-point fit curves that are 'parallel' to a desired curve. The nomograph first establishes the resistance to the minimum thermistor and the associated minimum network. If the parallel curve for this network is less than the desired curve, it can be realized. A higher resistance thermistor increases the parallel curve. Any such curve that is lower than the desired curve can be used. The difference in resistance is removed with a build-out resistor. The nomograph is designed for temperatures of 4°C (40°F), 32°C (90°F), and 60°C (140°F). These are equal intervals above and below 32°C. 32°C is somewhat higher than the usual room temperatures to allow for the presence of internal heating of the cabinet. The design is based on negligible self-heating of the thermistor.

ResearchGate has not been able to resolve any citations for this publication.

ResearchGate has not been able to resolve any references for this publication.

Article

Full-text available

IJARCCE Development of Wireless Sensor Network as an Application in Aerostats

April 2016

VIMAL KISHORE YADAV

This paper presents wireless sensor network (WSN) for health monitoring system of Aerostats. The paper discusses Aerostat and its health monitoring system; requirements and significance of wireless sensor network for the purpose of data monitoring and control. It also discusses the implementation methodology of such a network. System has been designed using Zigbee based transceiver with various ... [Show full abstract] types of sensors. Detailed description of the design & the components used for system implementation is presented in the paper.

Conference Paper

Full-text available

A Gravitational Search Algorithm for Energy Efficient Multi-sink Placement in Wireless Sensor Networ...

December 2016 · Lecture Notes in Computer Science

Optimal placement of multi-sink has been accepted an energy efficient approaches of extending the life of wireless sensor networks (WSNs). In this paper, a Gravitational Search Algorithm (GSA) based approach called GSA-MSP (Gravitational Search Algorithm based Multi-Sink Placement) for multi-sink placement for sensor network has been proposed. The algorithm has been designed with proper encoding ... [Show full abstract] scheme and a new fitness function. We consider the energy, Euclidian distance from the gateways to the sinks, and data rate of gateways are as parameters for the efficient design of GSA-MSP. The GSA-MSP has been tested vigorously over a varying number of sensors, gateways and sinks on various scenarios of WSNs. To show the efficacy of the GSA-MSP has been compared with some existing algorithms.

Article

Design Reasoning by Association

January 1970

The utility is demonstrated of a parallel distributed processing (PDP) approach to processing certain kinds of information of interest to designers. The information is of the kind that could be stored on a Hypercard stack. A system which facilitates the automatic linking of information on the basis of similarity is demonstrated. This approach fits within an overall framework of design reasoning ... [Show full abstract] by association

Article

Downhole heat exchanger experiments: Rotorua geothermal field

January 1989

The need for research for the application of downhole heat exchangers (DHE) in the Rotorua Geothermal field has arisen from the increased use of DHEs for heating and the limited performance information available to assist effective and efficient design. An experiment was designed in which two 4 in. diameter wells located at the Works depot in Te Ngae Road have been used. RR679 is fitted with a U ... [Show full abstract] tube DHE and well RR520, approximately 15 m away, is monitored for interference effects. The design and installation of the test facility is described and results of some experiments presented. A theoretical model of the installation is also presented which enables studies to be made of the major well and DHE design parameters.

Article

Design reasoning by association

January 1990 · Environment and Planning B Planning and Design

The utility is demonstrated of a parallel distributed processing (PDP) approach to processing certain kinds of information of interest to designers. The information is of the kind that could be stored on a Hypercard stack. A system which facilitates the automatic linking of information on the basis of similarity is demonstrated. This approach fits within an overall framework of design reasoning ... [Show full abstract] by association.

Article

IMPEDANCE MATCHING MADE EASY: A 3-STEP UNCOMPLICATED METHOD.

January 1975

Roy Nardin

Presented is a straightforward approach that requires only three steps to solve either purely resistive or complex impedance-matching problems accurately and without guesswork. Also, the designer has the option of using either a high-pass or low-pass matching section. However, the networks are matched at only one frequency, and the VSWR increases as the frequency moves off the design center.

Article

Full-text available

Design and Performance Study of a Precise Temperature Control Module

January 2012 · International Journal of Systems Signal Control and Engineering Application

In this study, an attempt has been made to describe the design and performance study of a precise temperature control module using the integrated circuit transducer. The transducer produces an output current proportional to absolute temperature. The device acts as a high impedance constant current generator. The highest thermal overshot has been recorded at the lower set point and the lowest at ... [Show full abstract] the higher. This designed module shows 1.53°C (average) thermal overshot and negligible undershot from the set point. This module can be used in any temperature-sensing application between 0 and 150°C in which conventional electrical temperature sensors are currently used.

Article

Design of potentiostat and I-V converter for micro pO2 sensor

January 1994 · Journal of Sensor Science and Technology

Design of potentiostat and I-V converter for micro pO2 sensor is described. Also, The operation of the designed circuit, in connection with the eqivalent model of micro pO2 sensor, is simulated. The potentiostat showed low output resistance of and input voltage range of . And the I-V converter showed low input resistance of and good linearity between input and output.

Article

A non-linear synthesis problem†

November 1980 · International Journal of Control

I. HOROWITZ

There is given a set of n ordered pairs of time functions (ri(t), xi;(t)). A network N is to be designed, whose output is xi(t − τ) in response to input ri(t − τ). A solution is presented consisting of n parallel branches, each with its own unique sampling function followed by a linear, time invariant network. The inputs ri(i) must, however, be linearly independent. If so, N is linear with ... [Show full abstract] respect to linear combinations of the nri(t). A general formula is found for the sensitivity of each response function to variations in the input signal. A slight modification gives a more general network, applicable to inputs ri not linearly independent. It is shown how to design N for stochastic, stationary inputs so that it presents n desired statistical weighting functions to the n inputs.

Article

Full-text available

Networks for sorting multitonic sequences

December 2005 · Journal of Parallel and Distributed Computing

Joel I. Seiferas

Lee and Batcher have designed networks that efficiently merge k separately provided sorted sequences of known lengths totalling n. We show that the design is still possible, and in fact easier to describe, if we do not make use of the lengths, or even the directions of monotonicity, of the individual sequences—the sequences can be provided in a single undelimited concatenation of length n. The ... [Show full abstract] depth of the simplest resulting network to sort sequences that are “k-tonic” and of length n is , generalizing Batcher's 1968 results for the extreme values of k (k=2 corresponding to merging, and k=⌈n/2⌉ corresponding to general sorting).The exposition is self-contained and can serve even as an introduction to sorting networks and Batcher's results.

Article

Full-text available

New high-precision bridge for low-resistance thermometry

August 1986 · Review of Scientific Instruments

We describe a simple four-terminal ac bridge designed to be used with sensors of low resistance, such as platinum thermometer at low temperature.

Article

Design of an AC contactor control module started by closed loop chopping

June 2013 · Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering

In this paper, the chopper control technology was introduced into the intelligent control of the AC contactor and an AC contactor control module starting with closed loop chopping has been designed. With this control module, the AC contactor has the functions of closed-loop DC starting, closed-loop DC keeping and anti-voltage sag. The proposed control module not only satisfies enterprises for ... [Show full abstract] high-capacity AC contactors with the function of anti-voltage sag but also makes it more robust. Starting closed loop uses coil current as feedback and allows the module to adjust the contactor coil current quickly. The optimization of starting process can be realized easier. The keeping closed loop can use coil voltage or coil current as feedback, it depends on the coil resistance. According to the control principle, the transient analysis and the AC analysis have been made, this paper also analyzed the suppression measures of current spike and designed the compensation network. The experimental results verify the validity of the control module.

Last Updated: 22 Oct 2024