Temperature Compensation Research Papers - Academia.edu (original) (raw)

Detection of low concentration of air pollution, like cigarette smoke, cooking fumes, etc. is possible with the combination of an air quality sensor and data acquisition system. In present paper is presented approach for design and... more

Detection of low concentration of air pollution, like cigarette smoke, cooking fumes, etc. is possible with the combination of an air quality sensor and data acquisition system. In present paper is presented approach for design and implementation of air quality monitoring system based on tin dioxide gas sensor, integrated temperature and humidity sensors, portable modular data acquisition system and graphical

A fiber Brag grating sensor interrogator has been developed which is capable of gathering vectors of information from individual fiber Bragg gratings by capturing the full optical spectrum 3 kHz. Using a field programmable gate array with... more

A fiber Brag grating sensor interrogator has been developed which is capable of gathering vectors of information from individual fiber Bragg gratings by capturing the full optical spectrum 3 kHz. Using a field programmable gate array with high speed digital-to-analog converters and analog-to-digital components, plus a kilohertz rate MEMS optical filter, the optical spectrum can be scanned at rates in excess of 10 million nanometers per second, allowing sensor sampling rates of many kilohertz while maintaining the necessary resolution to understand sensor changes. The autonomous system design performs all necessary detection and processing of multiple sensors and allows spectral measurements to be exported as fast as Ethernet, USB, or RS232 devices can receive it through a memory mapped interface. The high speed - full spectrum - fiber Bragg grating sensor interrogator enables advanced interrogation of dynamic strain and temperature gradients along the length of a sensor, as well as the use of each sensor for multiple stimuli, such as in temperature compensation. Two examples are described, showing interrogation of rapid laser heating in an optical fiber, as well as complex strain effects in a beam that had an engineered defect.

Clockmakers have long pioneered the design and experimentation of new materials, often in response to demands from the state as well as the market. Late eighteenth and early nineteenth century research into the errors to which marine... more

Clockmakers have long pioneered the design and experimentation of new materials, often in response to demands from the state as well as the market. Late eighteenth and early nineteenth century research into the errors to which marine chronometers were liable is a superb example of this. Balance springs made of hard-drawn gold, resistant to oxidation, were used by John Arnold from the late 1770s, and subsequently by his son John Roger, until Arnold senior’s death. In 1828, Johann Gottlieb Ulrich patented a non-ferrous balance, while, in Glasgow that same year, James Scrymgeour produced a flat spiral made entirely of glass. It is the remarkable application of glass to the construction of balance springs that is the concern of this article. Specifically, the efforts of the firm of Arnold & Dent, and later Dent alone, to secure the performance of their marine chronometers against variations in homogeneity, magnetism, temperature and elasticity, by using new materials for their balance springs.

This paper describes a new circuit of a temperature-compensated CMOS current reference. The temperature dependency of the output current has been compensated by the addition of two currents which have exactly opposite temperature... more

This paper describes a new circuit of a temperature-compensated CMOS current reference. The temperature dependency of the output current has been compensated by the addition of two currents which have exactly opposite temperature dependencies. Using a simple circuit, an appreciably low value of temperature drift of the output current has been obtained. The operation principle of the circuit has been

An integrable temperature compensation technique for CMOS current controlled current conveyor (CCCII) is proposed. It uses a current biasing circuit which has a current that is directly proportional to the absolute temperature and can... more

An integrable temperature compensation technique for CMOS current controlled current conveyor (CCCII) is proposed. It uses a current biasing circuit which has a current that is directly proportional to the absolute temperature and can also be electronically controlled. The HSPICE simulation results through the BSIM3v3 model parameters of 0.5 µm CMOS technology from MOSIS are given here. Furthermore, basic application examples as a current controlled second-order bandpass filter and a floating inductance simulator have been also considered.

Porous silicon based micro-machined peizoresistive pressure sensors are fabricated and tested in the range of 0–1 bar and temperature range of 25–80 °C. The dependence of pressure sensitivity on the variation of ambient temperature is... more

Porous silicon based micro-machined peizoresistive pressure sensors are fabricated and tested in the range of 0–1 bar and temperature range of 25–80 °C. The dependence of pressure sensitivity on the variation of ambient temperature is investigated. An intelligent online temperature compensation scheme using ANN technique has been described. The proposed scheme leads to an error reduction of approximately 98% from temperature uncompensated value. A hardware implementation of the proposed scheme using micro-controller is also described.

Filtration was studied in two Arctic clams, Hiatella arctica and Mya sp., collected in Young Sound, Northeast Greenland. Clearance rates were determined as a function of ambient temperature and algal cell concentration, using the... more

Filtration was studied in two Arctic clams, Hiatella arctica and Mya sp., collected in Young Sound, Northeast Greenland. Clearance rates were determined as a function of ambient temperature and algal cell concentration, using the clearance method and feeding with a unicellular flagellate. For both species, clearance rates increased with increasing temperature from &#1091 up to 4-8°C. At higher temperatures, filtration