Abstract
Ceramic gas sensors used for measuring ambient air quality have features suitable for practical applications such as healthcare and air quality management, but have a major drawback—large power consumption to preheat the sensor for accurate measurements. In this paper; the adaptive preheating duration control (APC) method is proposed to reduce the power consumption of ambient air quality sensor networks. APC reduces the duration of unnecessary preheating, thereby alleviating power consumption. Furthermore, the APC can allow systems to meet user requirements such as accuracy and periodicity factor when detecting the concentration of a target gas. A performance evaluation of the power consumption of gas sensors is conducted with various user requirements and factors that affect the preheating duration of the gas sensor. This shows that the power consumption of the APC is lower than that of continuous power supply methods and constant power supply/cutoff methods.
Highlights
People have moved toward spending more time indoors, such as at home or in the office.This increases the risk of exposure to various factors that are harmful to the human body
We propose a novel approach, called adaptive preheating duration control (APC), for solving the power consumption problem incurred by preheating the gas sensor to facilitate accurate detection
In this paper we have proposed an APC method that considers accuracy and periodicity as user requirements and reduces the power consumption of air quality gas sensor networks
Summary
People have moved toward spending more time indoors, such as at home or in the office. Methods considering the preheating of gas sensors for reducing the largest power consumption of the sensor networks are necessary. A semiconductor gas sensor normally utilizes a porous sintered block body consisting of polycrystalline particles of a semiconducting oxide such as SnO2, WO3, ZnO, or In2O3 [4] This sensor has been widely used in practical applications because it can detect various target gases with a fast response time and low cost. A feasible low-cost method for reducing the power consumption during the preheating of the gas sensors is required. We propose a novel approach, called adaptive preheating duration control (APC), for solving the power consumption problem incurred by preheating the gas sensor to facilitate accurate detection.
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