Portable device for monitoring consistency of carbon monoxide

Qingyu Zheng; Fuping Liang; Gang Liu; Xiaofei Wang

doi:10.1117/12.469907

11 June 2002 Portable device for monitoring consistency of carbon monoxide

Qingyu Zheng, Fuping Liang, Gang Liu, Xiaofei Wang

Proceedings Volume 4702, Smart Nondestructive Evaluation for Health Monitoring of Structural and Biological Systems; (2002) https://doi.org/10.1117/12.469907
Event: NDE For Health Monitoring and Diagnostics, 2002, San Diego, California, United States

Abstract

The necessity to nondestructively monitor concentration of carbon monoxide (CO), which is a colorless, tasteless and poisonous gas and is harmful to people, is disclosed. The portable device for monitoring concentration of CO plays an important role in health care and environment supervising for civil and industrial purposes. A basic circuit-based principle for the implementation of the device is presented with a detailed analysis for the key issues in designing. Specifically, the designing for the preamplifier is of great importance to the performance of the device. There is also introduced a method for getting standard voltage value from the micro-ampere current signal outputted from a carbon monoxide sensor and for restraining other gases to exert influence on the CO monitoring. Meanwhile, the paper teaches an anti-jamming technique for eliminating interference between analog and digital circuits within a very small system. In said device, a multi-function alarm circuit, which periodically performing its self-checking function, produces alarm with sound and light if the power of a battery is insufficient or the concentration of CO is detected to be over a set threshold. In addition, the major characteristics and applications for the device are also presented.

Citation Download Citation

Qingyu Zheng, Fuping Liang, Gang Liu, and Xiaofei Wang "Portable device for monitoring consistency of carbon monoxide", Proc. SPIE 4702, Smart Nondestructive Evaluation for Health Monitoring of Structural and Biological Systems, (11 June 2002); https://doi.org/10.1117/12.469907

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