Design of Temperature Detection Alarm Circuit Based on Multisim

Weijian Xu; Tao Wu

doi:10.4028/www.scientific.net/AMM.457-458.1627

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 457-458Design of Temperature Detection Alarm Circuit...

Design of Temperature Detection Alarm Circuit Based on Multisim

Abstract:

This paper mainly describes the characteristics of the utilization of thermistor resistance changes with temperature. When temperature is too low or too high, the thermal resistance values change correspondingly. This causes its associating sensor voltage signal changes. The changes of the voltage signal will lead to the subtraction proportional operation and dual comparator threshold voltage change correspondingly. This appearance enables the double threshold voltage comparators output highly, so that the multivibrator starts emitting diode conduct. Therefore the alarm circuit works.

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Periodical:

Applied Mechanics and Materials (Volumes 457-458)

Pages:

1627-1630

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.457-458.1627

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Online since:

October 2013

Authors:

Weijian Xu, Tao Wu*

Keywords:

555 Timer Multi-Vibrator Circuit, Dual Threshold Voltage Comparator, MULTISIM, Simulation

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References

[1] Tong Shibai, Hua Chengying. Fundamentals of Analog Electronic Technology. Higher Education Press. (2001).

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[2] Yuan Xun, shuai hua. Differential amplifier circuit simulation and analysis based on Multisim9. 0. Technology and the Market, Vol. 7(2010), pp.327-330.

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[3] Wang Quanyu. Applications of 555 multi-vibrator in temperature alarm circuit. University Physics Experiment, Vol. 5 (2010), pp.12-17.

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